Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
043405e1 CO |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
13 | * Amit Shah <amit.shah@qumranet.com> |
14 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
15 | * |
16 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
17 | * the COPYING file in the top-level directory. | |
18 | * | |
19 | */ | |
20 | ||
edf88417 | 21 | #include <linux/kvm_host.h> |
313a3dc7 | 22 | #include "irq.h" |
1d737c8a | 23 | #include "mmu.h" |
7837699f | 24 | #include "i8254.h" |
37817f29 | 25 | #include "tss.h" |
5fdbf976 | 26 | #include "kvm_cache_regs.h" |
26eef70c | 27 | #include "x86.h" |
313a3dc7 | 28 | |
18068523 | 29 | #include <linux/clocksource.h> |
4d5c5d0f | 30 | #include <linux/interrupt.h> |
313a3dc7 CO |
31 | #include <linux/kvm.h> |
32 | #include <linux/fs.h> | |
33 | #include <linux/vmalloc.h> | |
5fb76f9b | 34 | #include <linux/module.h> |
0de10343 | 35 | #include <linux/mman.h> |
2bacc55c | 36 | #include <linux/highmem.h> |
19de40a8 | 37 | #include <linux/iommu.h> |
62c476c7 | 38 | #include <linux/intel-iommu.h> |
c8076604 | 39 | #include <linux/cpufreq.h> |
aec51dc4 AK |
40 | #include <trace/events/kvm.h> |
41 | #undef TRACE_INCLUDE_FILE | |
229456fc MT |
42 | #define CREATE_TRACE_POINTS |
43 | #include "trace.h" | |
043405e1 CO |
44 | |
45 | #include <asm/uaccess.h> | |
d825ed0a | 46 | #include <asm/msr.h> |
a5f61300 | 47 | #include <asm/desc.h> |
0bed3b56 | 48 | #include <asm/mtrr.h> |
890ca9ae | 49 | #include <asm/mce.h> |
043405e1 | 50 | |
313a3dc7 | 51 | #define MAX_IO_MSRS 256 |
a03490ed CO |
52 | #define CR0_RESERVED_BITS \ |
53 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
54 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
55 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
56 | #define CR4_RESERVED_BITS \ | |
57 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
58 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
59 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
60 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
61 | ||
62 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
63 | |
64 | #define KVM_MAX_MCE_BANKS 32 | |
65 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
66 | ||
50a37eb4 JR |
67 | /* EFER defaults: |
68 | * - enable syscall per default because its emulated by KVM | |
69 | * - enable LME and LMA per default on 64 bit KVM | |
70 | */ | |
71 | #ifdef CONFIG_X86_64 | |
72 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
73 | #else | |
74 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
75 | #endif | |
313a3dc7 | 76 | |
ba1389b7 AK |
77 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
78 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 79 | |
674eea0f AK |
80 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
81 | struct kvm_cpuid_entry2 __user *entries); | |
82 | ||
97896d04 | 83 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 84 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 85 | |
ed85c068 AP |
86 | int ignore_msrs = 0; |
87 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
88 | ||
417bc304 | 89 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
90 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
91 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
92 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
93 | { "invlpg", VCPU_STAT(invlpg) }, | |
94 | { "exits", VCPU_STAT(exits) }, | |
95 | { "io_exits", VCPU_STAT(io_exits) }, | |
96 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
97 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
98 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 99 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
100 | { "halt_exits", VCPU_STAT(halt_exits) }, |
101 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 102 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
103 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
104 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
105 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
106 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
107 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
108 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
109 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 110 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 111 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
112 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
113 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
114 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
115 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
116 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
117 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 118 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 119 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 120 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 121 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
122 | { NULL } |
123 | }; | |
124 | ||
5fb76f9b CO |
125 | unsigned long segment_base(u16 selector) |
126 | { | |
127 | struct descriptor_table gdt; | |
a5f61300 | 128 | struct desc_struct *d; |
5fb76f9b CO |
129 | unsigned long table_base; |
130 | unsigned long v; | |
131 | ||
132 | if (selector == 0) | |
133 | return 0; | |
134 | ||
b792c344 | 135 | kvm_get_gdt(&gdt); |
5fb76f9b CO |
136 | table_base = gdt.base; |
137 | ||
138 | if (selector & 4) { /* from ldt */ | |
b792c344 | 139 | u16 ldt_selector = kvm_read_ldt(); |
5fb76f9b | 140 | |
5fb76f9b CO |
141 | table_base = segment_base(ldt_selector); |
142 | } | |
a5f61300 | 143 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
46a359e7 | 144 | v = get_desc_base(d); |
5fb76f9b | 145 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
146 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
147 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
148 | #endif |
149 | return v; | |
150 | } | |
151 | EXPORT_SYMBOL_GPL(segment_base); | |
152 | ||
6866b83e CO |
153 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
154 | { | |
155 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 156 | return vcpu->arch.apic_base; |
6866b83e | 157 | else |
ad312c7c | 158 | return vcpu->arch.apic_base; |
6866b83e CO |
159 | } |
160 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
161 | ||
162 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
163 | { | |
164 | /* TODO: reserve bits check */ | |
165 | if (irqchip_in_kernel(vcpu->kvm)) | |
166 | kvm_lapic_set_base(vcpu, data); | |
167 | else | |
ad312c7c | 168 | vcpu->arch.apic_base = data; |
6866b83e CO |
169 | } |
170 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
171 | ||
298101da AK |
172 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
173 | { | |
ad312c7c ZX |
174 | WARN_ON(vcpu->arch.exception.pending); |
175 | vcpu->arch.exception.pending = true; | |
176 | vcpu->arch.exception.has_error_code = false; | |
177 | vcpu->arch.exception.nr = nr; | |
298101da AK |
178 | } |
179 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
180 | ||
c3c91fee AK |
181 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
182 | u32 error_code) | |
183 | { | |
184 | ++vcpu->stat.pf_guest; | |
d8017474 | 185 | |
71c4dfaf | 186 | if (vcpu->arch.exception.pending) { |
6edf14d8 GN |
187 | switch(vcpu->arch.exception.nr) { |
188 | case DF_VECTOR: | |
71c4dfaf JR |
189 | /* triple fault -> shutdown */ |
190 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
6edf14d8 GN |
191 | return; |
192 | case PF_VECTOR: | |
193 | vcpu->arch.exception.nr = DF_VECTOR; | |
194 | vcpu->arch.exception.error_code = 0; | |
195 | return; | |
196 | default: | |
197 | /* replace previous exception with a new one in a hope | |
198 | that instruction re-execution will regenerate lost | |
199 | exception */ | |
200 | vcpu->arch.exception.pending = false; | |
201 | break; | |
71c4dfaf | 202 | } |
c3c91fee | 203 | } |
ad312c7c | 204 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
205 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
206 | } | |
207 | ||
3419ffc8 SY |
208 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
209 | { | |
210 | vcpu->arch.nmi_pending = 1; | |
211 | } | |
212 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
213 | ||
298101da AK |
214 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
215 | { | |
ad312c7c ZX |
216 | WARN_ON(vcpu->arch.exception.pending); |
217 | vcpu->arch.exception.pending = true; | |
218 | vcpu->arch.exception.has_error_code = true; | |
219 | vcpu->arch.exception.nr = nr; | |
220 | vcpu->arch.exception.error_code = error_code; | |
298101da AK |
221 | } |
222 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
223 | ||
a03490ed CO |
224 | /* |
225 | * Load the pae pdptrs. Return true is they are all valid. | |
226 | */ | |
227 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
228 | { | |
229 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
230 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
231 | int i; | |
232 | int ret; | |
ad312c7c | 233 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 234 | |
a03490ed CO |
235 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
236 | offset * sizeof(u64), sizeof(pdpte)); | |
237 | if (ret < 0) { | |
238 | ret = 0; | |
239 | goto out; | |
240 | } | |
241 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 242 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 243 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
244 | ret = 0; |
245 | goto out; | |
246 | } | |
247 | } | |
248 | ret = 1; | |
249 | ||
ad312c7c | 250 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
251 | __set_bit(VCPU_EXREG_PDPTR, |
252 | (unsigned long *)&vcpu->arch.regs_avail); | |
253 | __set_bit(VCPU_EXREG_PDPTR, | |
254 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 255 | out: |
a03490ed CO |
256 | |
257 | return ret; | |
258 | } | |
cc4b6871 | 259 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 260 | |
d835dfec AK |
261 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
262 | { | |
ad312c7c | 263 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
264 | bool changed = true; |
265 | int r; | |
266 | ||
267 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
268 | return false; | |
269 | ||
6de4f3ad AK |
270 | if (!test_bit(VCPU_EXREG_PDPTR, |
271 | (unsigned long *)&vcpu->arch.regs_avail)) | |
272 | return true; | |
273 | ||
ad312c7c | 274 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
275 | if (r < 0) |
276 | goto out; | |
ad312c7c | 277 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 278 | out: |
d835dfec AK |
279 | |
280 | return changed; | |
281 | } | |
282 | ||
2d3ad1f4 | 283 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed CO |
284 | { |
285 | if (cr0 & CR0_RESERVED_BITS) { | |
286 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 287 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 288 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
289 | return; |
290 | } | |
291 | ||
292 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
293 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 294 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
295 | return; |
296 | } | |
297 | ||
298 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
299 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
300 | "and a clear PE flag\n"); | |
c1a5d4f9 | 301 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
302 | return; |
303 | } | |
304 | ||
305 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
306 | #ifdef CONFIG_X86_64 | |
ad312c7c | 307 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
308 | int cs_db, cs_l; |
309 | ||
310 | if (!is_pae(vcpu)) { | |
311 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
312 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 313 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
314 | return; |
315 | } | |
316 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
317 | if (cs_l) { | |
318 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
319 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 320 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
321 | return; |
322 | ||
323 | } | |
324 | } else | |
325 | #endif | |
ad312c7c | 326 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
327 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
328 | "reserved bits\n"); | |
c1a5d4f9 | 329 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
330 | return; |
331 | } | |
332 | ||
333 | } | |
334 | ||
335 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 336 | vcpu->arch.cr0 = cr0; |
a03490ed | 337 | |
a03490ed | 338 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
339 | return; |
340 | } | |
2d3ad1f4 | 341 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 342 | |
2d3ad1f4 | 343 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 344 | { |
2d3ad1f4 | 345 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
a03490ed | 346 | } |
2d3ad1f4 | 347 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 348 | |
2d3ad1f4 | 349 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 350 | { |
a2edf57f AK |
351 | unsigned long old_cr4 = vcpu->arch.cr4; |
352 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; | |
353 | ||
a03490ed CO |
354 | if (cr4 & CR4_RESERVED_BITS) { |
355 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 356 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
357 | return; |
358 | } | |
359 | ||
360 | if (is_long_mode(vcpu)) { | |
361 | if (!(cr4 & X86_CR4_PAE)) { | |
362 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
363 | "in long mode\n"); | |
c1a5d4f9 | 364 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
365 | return; |
366 | } | |
a2edf57f AK |
367 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
368 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ad312c7c | 369 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 370 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 371 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
372 | return; |
373 | } | |
374 | ||
375 | if (cr4 & X86_CR4_VMXE) { | |
376 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 377 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
378 | return; |
379 | } | |
380 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 381 | vcpu->arch.cr4 = cr4; |
5a41accd | 382 | vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled; |
a03490ed | 383 | kvm_mmu_reset_context(vcpu); |
a03490ed | 384 | } |
2d3ad1f4 | 385 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 386 | |
2d3ad1f4 | 387 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 388 | { |
ad312c7c | 389 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 390 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
391 | kvm_mmu_flush_tlb(vcpu); |
392 | return; | |
393 | } | |
394 | ||
a03490ed CO |
395 | if (is_long_mode(vcpu)) { |
396 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
397 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 398 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
399 | return; |
400 | } | |
401 | } else { | |
402 | if (is_pae(vcpu)) { | |
403 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
404 | printk(KERN_DEBUG | |
405 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 406 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
407 | return; |
408 | } | |
409 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
410 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
411 | "reserved bits\n"); | |
c1a5d4f9 | 412 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
413 | return; |
414 | } | |
415 | } | |
416 | /* | |
417 | * We don't check reserved bits in nonpae mode, because | |
418 | * this isn't enforced, and VMware depends on this. | |
419 | */ | |
420 | } | |
421 | ||
a03490ed CO |
422 | /* |
423 | * Does the new cr3 value map to physical memory? (Note, we | |
424 | * catch an invalid cr3 even in real-mode, because it would | |
425 | * cause trouble later on when we turn on paging anyway.) | |
426 | * | |
427 | * A real CPU would silently accept an invalid cr3 and would | |
428 | * attempt to use it - with largely undefined (and often hard | |
429 | * to debug) behavior on the guest side. | |
430 | */ | |
431 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 432 | kvm_inject_gp(vcpu, 0); |
a03490ed | 433 | else { |
ad312c7c ZX |
434 | vcpu->arch.cr3 = cr3; |
435 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 436 | } |
a03490ed | 437 | } |
2d3ad1f4 | 438 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 439 | |
2d3ad1f4 | 440 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
441 | { |
442 | if (cr8 & CR8_RESERVED_BITS) { | |
443 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 444 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
445 | return; |
446 | } | |
447 | if (irqchip_in_kernel(vcpu->kvm)) | |
448 | kvm_lapic_set_tpr(vcpu, cr8); | |
449 | else | |
ad312c7c | 450 | vcpu->arch.cr8 = cr8; |
a03490ed | 451 | } |
2d3ad1f4 | 452 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 453 | |
2d3ad1f4 | 454 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
455 | { |
456 | if (irqchip_in_kernel(vcpu->kvm)) | |
457 | return kvm_lapic_get_cr8(vcpu); | |
458 | else | |
ad312c7c | 459 | return vcpu->arch.cr8; |
a03490ed | 460 | } |
2d3ad1f4 | 461 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 462 | |
d8017474 AG |
463 | static inline u32 bit(int bitno) |
464 | { | |
465 | return 1 << (bitno & 31); | |
466 | } | |
467 | ||
043405e1 CO |
468 | /* |
469 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
470 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
471 | * | |
472 | * This list is modified at module load time to reflect the | |
473 | * capabilities of the host cpu. | |
474 | */ | |
475 | static u32 msrs_to_save[] = { | |
476 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
477 | MSR_K6_STAR, | |
478 | #ifdef CONFIG_X86_64 | |
479 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
480 | #endif | |
af24a4e4 | 481 | MSR_IA32_TSC, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
b286d5d8 | 482 | MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
483 | }; |
484 | ||
485 | static unsigned num_msrs_to_save; | |
486 | ||
487 | static u32 emulated_msrs[] = { | |
488 | MSR_IA32_MISC_ENABLE, | |
489 | }; | |
490 | ||
15c4a640 CO |
491 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
492 | { | |
f2b4b7dd | 493 | if (efer & efer_reserved_bits) { |
15c4a640 CO |
494 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
495 | efer); | |
c1a5d4f9 | 496 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
497 | return; |
498 | } | |
499 | ||
500 | if (is_paging(vcpu) | |
ad312c7c | 501 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 502 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 503 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
504 | return; |
505 | } | |
506 | ||
1b2fd70c AG |
507 | if (efer & EFER_FFXSR) { |
508 | struct kvm_cpuid_entry2 *feat; | |
509 | ||
510 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
511 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { | |
512 | printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n"); | |
513 | kvm_inject_gp(vcpu, 0); | |
514 | return; | |
515 | } | |
516 | } | |
517 | ||
d8017474 AG |
518 | if (efer & EFER_SVME) { |
519 | struct kvm_cpuid_entry2 *feat; | |
520 | ||
521 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
522 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { | |
523 | printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n"); | |
524 | kvm_inject_gp(vcpu, 0); | |
525 | return; | |
526 | } | |
527 | } | |
528 | ||
15c4a640 CO |
529 | kvm_x86_ops->set_efer(vcpu, efer); |
530 | ||
531 | efer &= ~EFER_LMA; | |
ad312c7c | 532 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 533 | |
ad312c7c | 534 | vcpu->arch.shadow_efer = efer; |
9645bb56 AK |
535 | |
536 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; | |
537 | kvm_mmu_reset_context(vcpu); | |
15c4a640 CO |
538 | } |
539 | ||
f2b4b7dd JR |
540 | void kvm_enable_efer_bits(u64 mask) |
541 | { | |
542 | efer_reserved_bits &= ~mask; | |
543 | } | |
544 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
545 | ||
546 | ||
15c4a640 CO |
547 | /* |
548 | * Writes msr value into into the appropriate "register". | |
549 | * Returns 0 on success, non-0 otherwise. | |
550 | * Assumes vcpu_load() was already called. | |
551 | */ | |
552 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
553 | { | |
554 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
555 | } | |
556 | ||
313a3dc7 CO |
557 | /* |
558 | * Adapt set_msr() to msr_io()'s calling convention | |
559 | */ | |
560 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
561 | { | |
562 | return kvm_set_msr(vcpu, index, *data); | |
563 | } | |
564 | ||
18068523 GOC |
565 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
566 | { | |
567 | static int version; | |
50d0a0f9 GH |
568 | struct pvclock_wall_clock wc; |
569 | struct timespec now, sys, boot; | |
18068523 GOC |
570 | |
571 | if (!wall_clock) | |
572 | return; | |
573 | ||
574 | version++; | |
575 | ||
18068523 GOC |
576 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
577 | ||
50d0a0f9 GH |
578 | /* |
579 | * The guest calculates current wall clock time by adding | |
580 | * system time (updated by kvm_write_guest_time below) to the | |
581 | * wall clock specified here. guest system time equals host | |
582 | * system time for us, thus we must fill in host boot time here. | |
583 | */ | |
584 | now = current_kernel_time(); | |
585 | ktime_get_ts(&sys); | |
586 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); | |
587 | ||
588 | wc.sec = boot.tv_sec; | |
589 | wc.nsec = boot.tv_nsec; | |
590 | wc.version = version; | |
18068523 GOC |
591 | |
592 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
593 | ||
594 | version++; | |
595 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
596 | } |
597 | ||
50d0a0f9 GH |
598 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
599 | { | |
600 | uint32_t quotient, remainder; | |
601 | ||
602 | /* Don't try to replace with do_div(), this one calculates | |
603 | * "(dividend << 32) / divisor" */ | |
604 | __asm__ ( "divl %4" | |
605 | : "=a" (quotient), "=d" (remainder) | |
606 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
607 | return quotient; | |
608 | } | |
609 | ||
610 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
611 | { | |
612 | uint64_t nsecs = 1000000000LL; | |
613 | int32_t shift = 0; | |
614 | uint64_t tps64; | |
615 | uint32_t tps32; | |
616 | ||
617 | tps64 = tsc_khz * 1000LL; | |
618 | while (tps64 > nsecs*2) { | |
619 | tps64 >>= 1; | |
620 | shift--; | |
621 | } | |
622 | ||
623 | tps32 = (uint32_t)tps64; | |
624 | while (tps32 <= (uint32_t)nsecs) { | |
625 | tps32 <<= 1; | |
626 | shift++; | |
627 | } | |
628 | ||
629 | hv_clock->tsc_shift = shift; | |
630 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
631 | ||
632 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 633 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
634 | hv_clock->tsc_to_system_mul); |
635 | } | |
636 | ||
c8076604 GH |
637 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
638 | ||
18068523 GOC |
639 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
640 | { | |
641 | struct timespec ts; | |
642 | unsigned long flags; | |
643 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
644 | void *shared_kaddr; | |
463656c0 | 645 | unsigned long this_tsc_khz; |
18068523 GOC |
646 | |
647 | if ((!vcpu->time_page)) | |
648 | return; | |
649 | ||
463656c0 AK |
650 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
651 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
652 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
653 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 654 | } |
463656c0 | 655 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 656 | |
18068523 GOC |
657 | /* Keep irq disabled to prevent changes to the clock */ |
658 | local_irq_save(flags); | |
af24a4e4 | 659 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 GOC |
660 | ktime_get_ts(&ts); |
661 | local_irq_restore(flags); | |
662 | ||
663 | /* With all the info we got, fill in the values */ | |
664 | ||
665 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
666 | (NSEC_PER_SEC * (u64)ts.tv_sec); | |
667 | /* | |
668 | * The interface expects us to write an even number signaling that the | |
669 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 670 | * state, we just increase by 2 at the end. |
18068523 | 671 | */ |
50d0a0f9 | 672 | vcpu->hv_clock.version += 2; |
18068523 GOC |
673 | |
674 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
675 | ||
676 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 677 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
678 | |
679 | kunmap_atomic(shared_kaddr, KM_USER0); | |
680 | ||
681 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
682 | } | |
683 | ||
c8076604 GH |
684 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
685 | { | |
686 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
687 | ||
688 | if (!vcpu->time_page) | |
689 | return 0; | |
690 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
691 | return 1; | |
692 | } | |
693 | ||
9ba075a6 AK |
694 | static bool msr_mtrr_valid(unsigned msr) |
695 | { | |
696 | switch (msr) { | |
697 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
698 | case MSR_MTRRfix64K_00000: | |
699 | case MSR_MTRRfix16K_80000: | |
700 | case MSR_MTRRfix16K_A0000: | |
701 | case MSR_MTRRfix4K_C0000: | |
702 | case MSR_MTRRfix4K_C8000: | |
703 | case MSR_MTRRfix4K_D0000: | |
704 | case MSR_MTRRfix4K_D8000: | |
705 | case MSR_MTRRfix4K_E0000: | |
706 | case MSR_MTRRfix4K_E8000: | |
707 | case MSR_MTRRfix4K_F0000: | |
708 | case MSR_MTRRfix4K_F8000: | |
709 | case MSR_MTRRdefType: | |
710 | case MSR_IA32_CR_PAT: | |
711 | return true; | |
712 | case 0x2f8: | |
713 | return true; | |
714 | } | |
715 | return false; | |
716 | } | |
717 | ||
d6289b93 MT |
718 | static bool valid_pat_type(unsigned t) |
719 | { | |
720 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
721 | } | |
722 | ||
723 | static bool valid_mtrr_type(unsigned t) | |
724 | { | |
725 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
726 | } | |
727 | ||
728 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
729 | { | |
730 | int i; | |
731 | ||
732 | if (!msr_mtrr_valid(msr)) | |
733 | return false; | |
734 | ||
735 | if (msr == MSR_IA32_CR_PAT) { | |
736 | for (i = 0; i < 8; i++) | |
737 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
738 | return false; | |
739 | return true; | |
740 | } else if (msr == MSR_MTRRdefType) { | |
741 | if (data & ~0xcff) | |
742 | return false; | |
743 | return valid_mtrr_type(data & 0xff); | |
744 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
745 | for (i = 0; i < 8 ; i++) | |
746 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
747 | return false; | |
748 | return true; | |
749 | } | |
750 | ||
751 | /* variable MTRRs */ | |
752 | return valid_mtrr_type(data & 0xff); | |
753 | } | |
754 | ||
9ba075a6 AK |
755 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
756 | { | |
0bed3b56 SY |
757 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
758 | ||
d6289b93 | 759 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
760 | return 1; |
761 | ||
0bed3b56 SY |
762 | if (msr == MSR_MTRRdefType) { |
763 | vcpu->arch.mtrr_state.def_type = data; | |
764 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
765 | } else if (msr == MSR_MTRRfix64K_00000) | |
766 | p[0] = data; | |
767 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
768 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
769 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
770 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
771 | else if (msr == MSR_IA32_CR_PAT) | |
772 | vcpu->arch.pat = data; | |
773 | else { /* Variable MTRRs */ | |
774 | int idx, is_mtrr_mask; | |
775 | u64 *pt; | |
776 | ||
777 | idx = (msr - 0x200) / 2; | |
778 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
779 | if (!is_mtrr_mask) | |
780 | pt = | |
781 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
782 | else | |
783 | pt = | |
784 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
785 | *pt = data; | |
786 | } | |
787 | ||
788 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
789 | return 0; |
790 | } | |
15c4a640 | 791 | |
890ca9ae | 792 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 793 | { |
890ca9ae HY |
794 | u64 mcg_cap = vcpu->arch.mcg_cap; |
795 | unsigned bank_num = mcg_cap & 0xff; | |
796 | ||
15c4a640 | 797 | switch (msr) { |
15c4a640 | 798 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 799 | vcpu->arch.mcg_status = data; |
15c4a640 | 800 | break; |
c7ac679c | 801 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
802 | if (!(mcg_cap & MCG_CTL_P)) |
803 | return 1; | |
804 | if (data != 0 && data != ~(u64)0) | |
805 | return -1; | |
806 | vcpu->arch.mcg_ctl = data; | |
807 | break; | |
808 | default: | |
809 | if (msr >= MSR_IA32_MC0_CTL && | |
810 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
811 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
812 | /* only 0 or all 1s can be written to IA32_MCi_CTL */ | |
813 | if ((offset & 0x3) == 0 && | |
814 | data != 0 && data != ~(u64)0) | |
815 | return -1; | |
816 | vcpu->arch.mce_banks[offset] = data; | |
817 | break; | |
818 | } | |
819 | return 1; | |
820 | } | |
821 | return 0; | |
822 | } | |
823 | ||
824 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
825 | { | |
826 | switch (msr) { | |
827 | case MSR_EFER: | |
828 | set_efer(vcpu, data); | |
c7ac679c | 829 | break; |
8f1589d9 AP |
830 | case MSR_K7_HWCR: |
831 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
832 | if (data != 0) { | |
833 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
834 | data); | |
835 | return 1; | |
836 | } | |
837 | break; | |
f7c6d140 AP |
838 | case MSR_FAM10H_MMIO_CONF_BASE: |
839 | if (data != 0) { | |
840 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
841 | "0x%llx\n", data); | |
842 | return 1; | |
843 | } | |
844 | break; | |
c323c0e5 AP |
845 | case MSR_AMD64_NB_CFG: |
846 | break; | |
b5e2fec0 AG |
847 | case MSR_IA32_DEBUGCTLMSR: |
848 | if (!data) { | |
849 | /* We support the non-activated case already */ | |
850 | break; | |
851 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
852 | /* Values other than LBR and BTF are vendor-specific, | |
853 | thus reserved and should throw a #GP */ | |
854 | return 1; | |
855 | } | |
856 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
857 | __func__, data); | |
858 | break; | |
15c4a640 CO |
859 | case MSR_IA32_UCODE_REV: |
860 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 861 | case MSR_VM_HSAVE_PA: |
6098ca93 | 862 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 863 | break; |
9ba075a6 AK |
864 | case 0x200 ... 0x2ff: |
865 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
866 | case MSR_IA32_APICBASE: |
867 | kvm_set_apic_base(vcpu, data); | |
868 | break; | |
0105d1a5 GN |
869 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
870 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 871 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 872 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 873 | break; |
18068523 GOC |
874 | case MSR_KVM_WALL_CLOCK: |
875 | vcpu->kvm->arch.wall_clock = data; | |
876 | kvm_write_wall_clock(vcpu->kvm, data); | |
877 | break; | |
878 | case MSR_KVM_SYSTEM_TIME: { | |
879 | if (vcpu->arch.time_page) { | |
880 | kvm_release_page_dirty(vcpu->arch.time_page); | |
881 | vcpu->arch.time_page = NULL; | |
882 | } | |
883 | ||
884 | vcpu->arch.time = data; | |
885 | ||
886 | /* we verify if the enable bit is set... */ | |
887 | if (!(data & 1)) | |
888 | break; | |
889 | ||
890 | /* ...but clean it before doing the actual write */ | |
891 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
892 | ||
18068523 GOC |
893 | vcpu->arch.time_page = |
894 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
895 | |
896 | if (is_error_page(vcpu->arch.time_page)) { | |
897 | kvm_release_page_clean(vcpu->arch.time_page); | |
898 | vcpu->arch.time_page = NULL; | |
899 | } | |
900 | ||
c8076604 | 901 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
902 | break; |
903 | } | |
890ca9ae HY |
904 | case MSR_IA32_MCG_CTL: |
905 | case MSR_IA32_MCG_STATUS: | |
906 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
907 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
908 | |
909 | /* Performance counters are not protected by a CPUID bit, | |
910 | * so we should check all of them in the generic path for the sake of | |
911 | * cross vendor migration. | |
912 | * Writing a zero into the event select MSRs disables them, | |
913 | * which we perfectly emulate ;-). Any other value should be at least | |
914 | * reported, some guests depend on them. | |
915 | */ | |
916 | case MSR_P6_EVNTSEL0: | |
917 | case MSR_P6_EVNTSEL1: | |
918 | case MSR_K7_EVNTSEL0: | |
919 | case MSR_K7_EVNTSEL1: | |
920 | case MSR_K7_EVNTSEL2: | |
921 | case MSR_K7_EVNTSEL3: | |
922 | if (data != 0) | |
923 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
924 | "0x%x data 0x%llx\n", msr, data); | |
925 | break; | |
926 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
927 | * so we ignore writes to make it happy. | |
928 | */ | |
929 | case MSR_P6_PERFCTR0: | |
930 | case MSR_P6_PERFCTR1: | |
931 | case MSR_K7_PERFCTR0: | |
932 | case MSR_K7_PERFCTR1: | |
933 | case MSR_K7_PERFCTR2: | |
934 | case MSR_K7_PERFCTR3: | |
935 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
936 | "0x%x data 0x%llx\n", msr, data); | |
937 | break; | |
15c4a640 | 938 | default: |
ed85c068 AP |
939 | if (!ignore_msrs) { |
940 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
941 | msr, data); | |
942 | return 1; | |
943 | } else { | |
944 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
945 | msr, data); | |
946 | break; | |
947 | } | |
15c4a640 CO |
948 | } |
949 | return 0; | |
950 | } | |
951 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
952 | ||
953 | ||
954 | /* | |
955 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
956 | * Returns 0 on success, non-0 otherwise. | |
957 | * Assumes vcpu_load() was already called. | |
958 | */ | |
959 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
960 | { | |
961 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
962 | } | |
963 | ||
9ba075a6 AK |
964 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
965 | { | |
0bed3b56 SY |
966 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
967 | ||
9ba075a6 AK |
968 | if (!msr_mtrr_valid(msr)) |
969 | return 1; | |
970 | ||
0bed3b56 SY |
971 | if (msr == MSR_MTRRdefType) |
972 | *pdata = vcpu->arch.mtrr_state.def_type + | |
973 | (vcpu->arch.mtrr_state.enabled << 10); | |
974 | else if (msr == MSR_MTRRfix64K_00000) | |
975 | *pdata = p[0]; | |
976 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
977 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
978 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
979 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
980 | else if (msr == MSR_IA32_CR_PAT) | |
981 | *pdata = vcpu->arch.pat; | |
982 | else { /* Variable MTRRs */ | |
983 | int idx, is_mtrr_mask; | |
984 | u64 *pt; | |
985 | ||
986 | idx = (msr - 0x200) / 2; | |
987 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
988 | if (!is_mtrr_mask) | |
989 | pt = | |
990 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
991 | else | |
992 | pt = | |
993 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
994 | *pdata = *pt; | |
995 | } | |
996 | ||
9ba075a6 AK |
997 | return 0; |
998 | } | |
999 | ||
890ca9ae | 1000 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1001 | { |
1002 | u64 data; | |
890ca9ae HY |
1003 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1004 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1005 | |
1006 | switch (msr) { | |
15c4a640 CO |
1007 | case MSR_IA32_P5_MC_ADDR: |
1008 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1009 | data = 0; |
1010 | break; | |
15c4a640 | 1011 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1012 | data = vcpu->arch.mcg_cap; |
1013 | break; | |
c7ac679c | 1014 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1015 | if (!(mcg_cap & MCG_CTL_P)) |
1016 | return 1; | |
1017 | data = vcpu->arch.mcg_ctl; | |
1018 | break; | |
1019 | case MSR_IA32_MCG_STATUS: | |
1020 | data = vcpu->arch.mcg_status; | |
1021 | break; | |
1022 | default: | |
1023 | if (msr >= MSR_IA32_MC0_CTL && | |
1024 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1025 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1026 | data = vcpu->arch.mce_banks[offset]; | |
1027 | break; | |
1028 | } | |
1029 | return 1; | |
1030 | } | |
1031 | *pdata = data; | |
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1036 | { | |
1037 | u64 data; | |
1038 | ||
1039 | switch (msr) { | |
890ca9ae | 1040 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1041 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1042 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1043 | case MSR_IA32_DEBUGCTLMSR: |
1044 | case MSR_IA32_LASTBRANCHFROMIP: | |
1045 | case MSR_IA32_LASTBRANCHTOIP: | |
1046 | case MSR_IA32_LASTINTFROMIP: | |
1047 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1048 | case MSR_K8_SYSCFG: |
1049 | case MSR_K7_HWCR: | |
61a6bd67 | 1050 | case MSR_VM_HSAVE_PA: |
7fe29e0f AS |
1051 | case MSR_P6_EVNTSEL0: |
1052 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1053 | case MSR_K7_EVNTSEL0: |
1fdbd48c | 1054 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1055 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1056 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1057 | data = 0; |
1058 | break; | |
9ba075a6 AK |
1059 | case MSR_MTRRcap: |
1060 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1061 | break; | |
1062 | case 0x200 ... 0x2ff: | |
1063 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1064 | case 0xcd: /* fsb frequency */ |
1065 | data = 3; | |
1066 | break; | |
1067 | case MSR_IA32_APICBASE: | |
1068 | data = kvm_get_apic_base(vcpu); | |
1069 | break; | |
0105d1a5 GN |
1070 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1071 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1072 | break; | |
15c4a640 | 1073 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1074 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1075 | break; |
847f0ad8 AG |
1076 | case MSR_IA32_PERF_STATUS: |
1077 | /* TSC increment by tick */ | |
1078 | data = 1000ULL; | |
1079 | /* CPU multiplier */ | |
1080 | data |= (((uint64_t)4ULL) << 40); | |
1081 | break; | |
15c4a640 | 1082 | case MSR_EFER: |
ad312c7c | 1083 | data = vcpu->arch.shadow_efer; |
15c4a640 | 1084 | break; |
18068523 GOC |
1085 | case MSR_KVM_WALL_CLOCK: |
1086 | data = vcpu->kvm->arch.wall_clock; | |
1087 | break; | |
1088 | case MSR_KVM_SYSTEM_TIME: | |
1089 | data = vcpu->arch.time; | |
1090 | break; | |
890ca9ae HY |
1091 | case MSR_IA32_P5_MC_ADDR: |
1092 | case MSR_IA32_P5_MC_TYPE: | |
1093 | case MSR_IA32_MCG_CAP: | |
1094 | case MSR_IA32_MCG_CTL: | |
1095 | case MSR_IA32_MCG_STATUS: | |
1096 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1097 | return get_msr_mce(vcpu, msr, pdata); | |
15c4a640 | 1098 | default: |
ed85c068 AP |
1099 | if (!ignore_msrs) { |
1100 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1101 | return 1; | |
1102 | } else { | |
1103 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1104 | data = 0; | |
1105 | } | |
1106 | break; | |
15c4a640 CO |
1107 | } |
1108 | *pdata = data; | |
1109 | return 0; | |
1110 | } | |
1111 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1112 | ||
313a3dc7 CO |
1113 | /* |
1114 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1115 | * | |
1116 | * @return number of msrs set successfully. | |
1117 | */ | |
1118 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1119 | struct kvm_msr_entry *entries, | |
1120 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1121 | unsigned index, u64 *data)) | |
1122 | { | |
1123 | int i; | |
1124 | ||
1125 | vcpu_load(vcpu); | |
1126 | ||
3200f405 | 1127 | down_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
1128 | for (i = 0; i < msrs->nmsrs; ++i) |
1129 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1130 | break; | |
3200f405 | 1131 | up_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
1132 | |
1133 | vcpu_put(vcpu); | |
1134 | ||
1135 | return i; | |
1136 | } | |
1137 | ||
1138 | /* | |
1139 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1140 | * | |
1141 | * @return number of msrs set successfully. | |
1142 | */ | |
1143 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1144 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1145 | unsigned index, u64 *data), | |
1146 | int writeback) | |
1147 | { | |
1148 | struct kvm_msrs msrs; | |
1149 | struct kvm_msr_entry *entries; | |
1150 | int r, n; | |
1151 | unsigned size; | |
1152 | ||
1153 | r = -EFAULT; | |
1154 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1155 | goto out; | |
1156 | ||
1157 | r = -E2BIG; | |
1158 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1159 | goto out; | |
1160 | ||
1161 | r = -ENOMEM; | |
1162 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
1163 | entries = vmalloc(size); | |
1164 | if (!entries) | |
1165 | goto out; | |
1166 | ||
1167 | r = -EFAULT; | |
1168 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1169 | goto out_free; | |
1170 | ||
1171 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1172 | if (r < 0) | |
1173 | goto out_free; | |
1174 | ||
1175 | r = -EFAULT; | |
1176 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1177 | goto out_free; | |
1178 | ||
1179 | r = n; | |
1180 | ||
1181 | out_free: | |
1182 | vfree(entries); | |
1183 | out: | |
1184 | return r; | |
1185 | } | |
1186 | ||
018d00d2 ZX |
1187 | int kvm_dev_ioctl_check_extension(long ext) |
1188 | { | |
1189 | int r; | |
1190 | ||
1191 | switch (ext) { | |
1192 | case KVM_CAP_IRQCHIP: | |
1193 | case KVM_CAP_HLT: | |
1194 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1195 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1196 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1197 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1198 | case KVM_CAP_PIT: |
a28e4f5a | 1199 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1200 | case KVM_CAP_MP_STATE: |
ed848624 | 1201 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1202 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1203 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1204 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1205 | case KVM_CAP_IRQFD: |
d34e6b17 | 1206 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1207 | case KVM_CAP_PIT2: |
e9f42757 | 1208 | case KVM_CAP_PIT_STATE2: |
b927a3ce | 1209 | case KVM_CAP_SET_IDENTITY_MAP_ADDR: |
018d00d2 ZX |
1210 | r = 1; |
1211 | break; | |
542472b5 LV |
1212 | case KVM_CAP_COALESCED_MMIO: |
1213 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1214 | break; | |
774ead3a AK |
1215 | case KVM_CAP_VAPIC: |
1216 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1217 | break; | |
f725230a AK |
1218 | case KVM_CAP_NR_VCPUS: |
1219 | r = KVM_MAX_VCPUS; | |
1220 | break; | |
a988b910 AK |
1221 | case KVM_CAP_NR_MEMSLOTS: |
1222 | r = KVM_MEMORY_SLOTS; | |
1223 | break; | |
2f333bcb MT |
1224 | case KVM_CAP_PV_MMU: |
1225 | r = !tdp_enabled; | |
1226 | break; | |
62c476c7 | 1227 | case KVM_CAP_IOMMU: |
19de40a8 | 1228 | r = iommu_found(); |
62c476c7 | 1229 | break; |
890ca9ae HY |
1230 | case KVM_CAP_MCE: |
1231 | r = KVM_MAX_MCE_BANKS; | |
1232 | break; | |
018d00d2 ZX |
1233 | default: |
1234 | r = 0; | |
1235 | break; | |
1236 | } | |
1237 | return r; | |
1238 | ||
1239 | } | |
1240 | ||
043405e1 CO |
1241 | long kvm_arch_dev_ioctl(struct file *filp, |
1242 | unsigned int ioctl, unsigned long arg) | |
1243 | { | |
1244 | void __user *argp = (void __user *)arg; | |
1245 | long r; | |
1246 | ||
1247 | switch (ioctl) { | |
1248 | case KVM_GET_MSR_INDEX_LIST: { | |
1249 | struct kvm_msr_list __user *user_msr_list = argp; | |
1250 | struct kvm_msr_list msr_list; | |
1251 | unsigned n; | |
1252 | ||
1253 | r = -EFAULT; | |
1254 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1255 | goto out; | |
1256 | n = msr_list.nmsrs; | |
1257 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1258 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1259 | goto out; | |
1260 | r = -E2BIG; | |
e125e7b6 | 1261 | if (n < msr_list.nmsrs) |
043405e1 CO |
1262 | goto out; |
1263 | r = -EFAULT; | |
1264 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1265 | num_msrs_to_save * sizeof(u32))) | |
1266 | goto out; | |
e125e7b6 | 1267 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1268 | &emulated_msrs, |
1269 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1270 | goto out; | |
1271 | r = 0; | |
1272 | break; | |
1273 | } | |
674eea0f AK |
1274 | case KVM_GET_SUPPORTED_CPUID: { |
1275 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1276 | struct kvm_cpuid2 cpuid; | |
1277 | ||
1278 | r = -EFAULT; | |
1279 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1280 | goto out; | |
1281 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1282 | cpuid_arg->entries); |
674eea0f AK |
1283 | if (r) |
1284 | goto out; | |
1285 | ||
1286 | r = -EFAULT; | |
1287 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1288 | goto out; | |
1289 | r = 0; | |
1290 | break; | |
1291 | } | |
890ca9ae HY |
1292 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1293 | u64 mce_cap; | |
1294 | ||
1295 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1296 | r = -EFAULT; | |
1297 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1298 | goto out; | |
1299 | r = 0; | |
1300 | break; | |
1301 | } | |
043405e1 CO |
1302 | default: |
1303 | r = -EINVAL; | |
1304 | } | |
1305 | out: | |
1306 | return r; | |
1307 | } | |
1308 | ||
313a3dc7 CO |
1309 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1310 | { | |
1311 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
c8076604 | 1312 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1313 | } |
1314 | ||
1315 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1316 | { | |
1317 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 1318 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1319 | } |
1320 | ||
07716717 | 1321 | static int is_efer_nx(void) |
313a3dc7 | 1322 | { |
e286e86e | 1323 | unsigned long long efer = 0; |
313a3dc7 | 1324 | |
e286e86e | 1325 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1326 | return efer & EFER_NX; |
1327 | } | |
1328 | ||
1329 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1330 | { | |
1331 | int i; | |
1332 | struct kvm_cpuid_entry2 *e, *entry; | |
1333 | ||
313a3dc7 | 1334 | entry = NULL; |
ad312c7c ZX |
1335 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1336 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1337 | if (e->function == 0x80000001) { |
1338 | entry = e; | |
1339 | break; | |
1340 | } | |
1341 | } | |
07716717 | 1342 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1343 | entry->edx &= ~(1 << 20); |
1344 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1345 | } | |
1346 | } | |
1347 | ||
07716717 | 1348 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1349 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1350 | struct kvm_cpuid *cpuid, | |
1351 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1352 | { |
1353 | int r, i; | |
1354 | struct kvm_cpuid_entry *cpuid_entries; | |
1355 | ||
1356 | r = -E2BIG; | |
1357 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1358 | goto out; | |
1359 | r = -ENOMEM; | |
1360 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1361 | if (!cpuid_entries) | |
1362 | goto out; | |
1363 | r = -EFAULT; | |
1364 | if (copy_from_user(cpuid_entries, entries, | |
1365 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1366 | goto out_free; | |
1367 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1368 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1369 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1370 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1371 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1372 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1373 | vcpu->arch.cpuid_entries[i].index = 0; | |
1374 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1375 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1376 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1377 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1378 | } | |
1379 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1380 | cpuid_fix_nx_cap(vcpu); |
1381 | r = 0; | |
fc61b800 | 1382 | kvm_apic_set_version(vcpu); |
07716717 DK |
1383 | |
1384 | out_free: | |
1385 | vfree(cpuid_entries); | |
1386 | out: | |
1387 | return r; | |
1388 | } | |
1389 | ||
1390 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1391 | struct kvm_cpuid2 *cpuid, |
1392 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1393 | { |
1394 | int r; | |
1395 | ||
1396 | r = -E2BIG; | |
1397 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1398 | goto out; | |
1399 | r = -EFAULT; | |
ad312c7c | 1400 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1401 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1402 | goto out; |
ad312c7c | 1403 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1404 | kvm_apic_set_version(vcpu); |
313a3dc7 CO |
1405 | return 0; |
1406 | ||
1407 | out: | |
1408 | return r; | |
1409 | } | |
1410 | ||
07716717 | 1411 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1412 | struct kvm_cpuid2 *cpuid, |
1413 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1414 | { |
1415 | int r; | |
1416 | ||
1417 | r = -E2BIG; | |
ad312c7c | 1418 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1419 | goto out; |
1420 | r = -EFAULT; | |
ad312c7c | 1421 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1422 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1423 | goto out; |
1424 | return 0; | |
1425 | ||
1426 | out: | |
ad312c7c | 1427 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1428 | return r; |
1429 | } | |
1430 | ||
07716717 | 1431 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1432 | u32 index) |
07716717 DK |
1433 | { |
1434 | entry->function = function; | |
1435 | entry->index = index; | |
1436 | cpuid_count(entry->function, entry->index, | |
19355475 | 1437 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1438 | entry->flags = 0; |
1439 | } | |
1440 | ||
7faa4ee1 AK |
1441 | #define F(x) bit(X86_FEATURE_##x) |
1442 | ||
07716717 DK |
1443 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1444 | u32 index, int *nent, int maxnent) | |
1445 | { | |
7faa4ee1 | 1446 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
344f414f | 1447 | unsigned f_gbpages = kvm_x86_ops->gb_page_enable() ? F(GBPAGES) : 0; |
07716717 | 1448 | #ifdef CONFIG_X86_64 |
7faa4ee1 AK |
1449 | unsigned f_lm = F(LM); |
1450 | #else | |
1451 | unsigned f_lm = 0; | |
07716717 | 1452 | #endif |
7faa4ee1 AK |
1453 | |
1454 | /* cpuid 1.edx */ | |
1455 | const u32 kvm_supported_word0_x86_features = | |
1456 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1457 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1458 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1459 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1460 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1461 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1462 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1463 | 0 /* HTT, TM, Reserved, PBE */; | |
1464 | /* cpuid 0x80000001.edx */ | |
1465 | const u32 kvm_supported_word1_x86_features = | |
1466 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1467 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1468 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1469 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1470 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1471 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
344f414f | 1472 | F(FXSR) | F(FXSR_OPT) | f_gbpages | 0 /* RDTSCP */ | |
7faa4ee1 AK |
1473 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); |
1474 | /* cpuid 1.ecx */ | |
1475 | const u32 kvm_supported_word4_x86_features = | |
d149c731 AK |
1476 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
1477 | 0 /* DS-CPL, VMX, SMX, EST */ | | |
1478 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1479 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1480 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1481 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
d149c731 | 1482 | 0 /* Reserved, XSAVE, OSXSAVE */; |
7faa4ee1 | 1483 | /* cpuid 0x80000001.ecx */ |
07716717 | 1484 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1485 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1486 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1487 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
1488 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 1489 | |
19355475 | 1490 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1491 | get_cpu(); |
1492 | do_cpuid_1_ent(entry, function, index); | |
1493 | ++*nent; | |
1494 | ||
1495 | switch (function) { | |
1496 | case 0: | |
1497 | entry->eax = min(entry->eax, (u32)0xb); | |
1498 | break; | |
1499 | case 1: | |
1500 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 1501 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
1502 | /* we support x2apic emulation even if host does not support |
1503 | * it since we emulate x2apic in software */ | |
1504 | entry->ecx |= F(X2APIC); | |
07716717 DK |
1505 | break; |
1506 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1507 | * may return different values. This forces us to get_cpu() before | |
1508 | * issuing the first command, and also to emulate this annoying behavior | |
1509 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1510 | case 2: { | |
1511 | int t, times = entry->eax & 0xff; | |
1512 | ||
1513 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1514 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1515 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1516 | do_cpuid_1_ent(&entry[t], function, 0); | |
1517 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1518 | ++*nent; | |
1519 | } | |
1520 | break; | |
1521 | } | |
1522 | /* function 4 and 0xb have additional index. */ | |
1523 | case 4: { | |
14af3f3c | 1524 | int i, cache_type; |
07716717 DK |
1525 | |
1526 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1527 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1528 | for (i = 1; *nent < maxnent; ++i) { |
1529 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1530 | if (!cache_type) |
1531 | break; | |
14af3f3c HH |
1532 | do_cpuid_1_ent(&entry[i], function, i); |
1533 | entry[i].flags |= | |
07716717 DK |
1534 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1535 | ++*nent; | |
1536 | } | |
1537 | break; | |
1538 | } | |
1539 | case 0xb: { | |
14af3f3c | 1540 | int i, level_type; |
07716717 DK |
1541 | |
1542 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1543 | /* read more entries until level_type is zero */ | |
14af3f3c | 1544 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1545 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1546 | if (!level_type) |
1547 | break; | |
14af3f3c HH |
1548 | do_cpuid_1_ent(&entry[i], function, i); |
1549 | entry[i].flags |= | |
07716717 DK |
1550 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1551 | ++*nent; | |
1552 | } | |
1553 | break; | |
1554 | } | |
1555 | case 0x80000000: | |
1556 | entry->eax = min(entry->eax, 0x8000001a); | |
1557 | break; | |
1558 | case 0x80000001: | |
1559 | entry->edx &= kvm_supported_word1_x86_features; | |
1560 | entry->ecx &= kvm_supported_word6_x86_features; | |
1561 | break; | |
1562 | } | |
1563 | put_cpu(); | |
1564 | } | |
1565 | ||
7faa4ee1 AK |
1566 | #undef F |
1567 | ||
674eea0f | 1568 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 1569 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
1570 | { |
1571 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1572 | int limit, nent = 0, r = -E2BIG; | |
1573 | u32 func; | |
1574 | ||
1575 | if (cpuid->nent < 1) | |
1576 | goto out; | |
1577 | r = -ENOMEM; | |
1578 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1579 | if (!cpuid_entries) | |
1580 | goto out; | |
1581 | ||
1582 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1583 | limit = cpuid_entries[0].eax; | |
1584 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1585 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1586 | &nent, cpuid->nent); |
07716717 DK |
1587 | r = -E2BIG; |
1588 | if (nent >= cpuid->nent) | |
1589 | goto out_free; | |
1590 | ||
1591 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1592 | limit = cpuid_entries[nent - 1].eax; | |
1593 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1594 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1595 | &nent, cpuid->nent); |
cb007648 MM |
1596 | r = -E2BIG; |
1597 | if (nent >= cpuid->nent) | |
1598 | goto out_free; | |
1599 | ||
07716717 DK |
1600 | r = -EFAULT; |
1601 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 1602 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1603 | goto out_free; |
1604 | cpuid->nent = nent; | |
1605 | r = 0; | |
1606 | ||
1607 | out_free: | |
1608 | vfree(cpuid_entries); | |
1609 | out: | |
1610 | return r; | |
1611 | } | |
1612 | ||
313a3dc7 CO |
1613 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1614 | struct kvm_lapic_state *s) | |
1615 | { | |
1616 | vcpu_load(vcpu); | |
ad312c7c | 1617 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1618 | vcpu_put(vcpu); |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
1623 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1624 | struct kvm_lapic_state *s) | |
1625 | { | |
1626 | vcpu_load(vcpu); | |
ad312c7c | 1627 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 CO |
1628 | kvm_apic_post_state_restore(vcpu); |
1629 | vcpu_put(vcpu); | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
f77bc6a4 ZX |
1634 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1635 | struct kvm_interrupt *irq) | |
1636 | { | |
1637 | if (irq->irq < 0 || irq->irq >= 256) | |
1638 | return -EINVAL; | |
1639 | if (irqchip_in_kernel(vcpu->kvm)) | |
1640 | return -ENXIO; | |
1641 | vcpu_load(vcpu); | |
1642 | ||
66fd3f7f | 1643 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 ZX |
1644 | |
1645 | vcpu_put(vcpu); | |
1646 | ||
1647 | return 0; | |
1648 | } | |
1649 | ||
c4abb7c9 JK |
1650 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
1651 | { | |
1652 | vcpu_load(vcpu); | |
1653 | kvm_inject_nmi(vcpu); | |
1654 | vcpu_put(vcpu); | |
1655 | ||
1656 | return 0; | |
1657 | } | |
1658 | ||
b209749f AK |
1659 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1660 | struct kvm_tpr_access_ctl *tac) | |
1661 | { | |
1662 | if (tac->flags) | |
1663 | return -EINVAL; | |
1664 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1665 | return 0; | |
1666 | } | |
1667 | ||
890ca9ae HY |
1668 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
1669 | u64 mcg_cap) | |
1670 | { | |
1671 | int r; | |
1672 | unsigned bank_num = mcg_cap & 0xff, bank; | |
1673 | ||
1674 | r = -EINVAL; | |
1675 | if (!bank_num) | |
1676 | goto out; | |
1677 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
1678 | goto out; | |
1679 | r = 0; | |
1680 | vcpu->arch.mcg_cap = mcg_cap; | |
1681 | /* Init IA32_MCG_CTL to all 1s */ | |
1682 | if (mcg_cap & MCG_CTL_P) | |
1683 | vcpu->arch.mcg_ctl = ~(u64)0; | |
1684 | /* Init IA32_MCi_CTL to all 1s */ | |
1685 | for (bank = 0; bank < bank_num; bank++) | |
1686 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
1687 | out: | |
1688 | return r; | |
1689 | } | |
1690 | ||
1691 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
1692 | struct kvm_x86_mce *mce) | |
1693 | { | |
1694 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
1695 | unsigned bank_num = mcg_cap & 0xff; | |
1696 | u64 *banks = vcpu->arch.mce_banks; | |
1697 | ||
1698 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
1699 | return -EINVAL; | |
1700 | /* | |
1701 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
1702 | * reporting is disabled | |
1703 | */ | |
1704 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
1705 | vcpu->arch.mcg_ctl != ~(u64)0) | |
1706 | return 0; | |
1707 | banks += 4 * mce->bank; | |
1708 | /* | |
1709 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
1710 | * reporting is disabled for the bank | |
1711 | */ | |
1712 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
1713 | return 0; | |
1714 | if (mce->status & MCI_STATUS_UC) { | |
1715 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
1716 | !(vcpu->arch.cr4 & X86_CR4_MCE)) { | |
1717 | printk(KERN_DEBUG "kvm: set_mce: " | |
1718 | "injects mce exception while " | |
1719 | "previous one is in progress!\n"); | |
1720 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
1721 | return 0; | |
1722 | } | |
1723 | if (banks[1] & MCI_STATUS_VAL) | |
1724 | mce->status |= MCI_STATUS_OVER; | |
1725 | banks[2] = mce->addr; | |
1726 | banks[3] = mce->misc; | |
1727 | vcpu->arch.mcg_status = mce->mcg_status; | |
1728 | banks[1] = mce->status; | |
1729 | kvm_queue_exception(vcpu, MC_VECTOR); | |
1730 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
1731 | || !(banks[1] & MCI_STATUS_UC)) { | |
1732 | if (banks[1] & MCI_STATUS_VAL) | |
1733 | mce->status |= MCI_STATUS_OVER; | |
1734 | banks[2] = mce->addr; | |
1735 | banks[3] = mce->misc; | |
1736 | banks[1] = mce->status; | |
1737 | } else | |
1738 | banks[1] |= MCI_STATUS_OVER; | |
1739 | return 0; | |
1740 | } | |
1741 | ||
313a3dc7 CO |
1742 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1743 | unsigned int ioctl, unsigned long arg) | |
1744 | { | |
1745 | struct kvm_vcpu *vcpu = filp->private_data; | |
1746 | void __user *argp = (void __user *)arg; | |
1747 | int r; | |
b772ff36 | 1748 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
1749 | |
1750 | switch (ioctl) { | |
1751 | case KVM_GET_LAPIC: { | |
b772ff36 | 1752 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 1753 | |
b772ff36 DH |
1754 | r = -ENOMEM; |
1755 | if (!lapic) | |
1756 | goto out; | |
1757 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
1758 | if (r) |
1759 | goto out; | |
1760 | r = -EFAULT; | |
b772ff36 | 1761 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
1762 | goto out; |
1763 | r = 0; | |
1764 | break; | |
1765 | } | |
1766 | case KVM_SET_LAPIC: { | |
b772ff36 DH |
1767 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
1768 | r = -ENOMEM; | |
1769 | if (!lapic) | |
1770 | goto out; | |
313a3dc7 | 1771 | r = -EFAULT; |
b772ff36 | 1772 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 1773 | goto out; |
b772ff36 | 1774 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
1775 | if (r) |
1776 | goto out; | |
1777 | r = 0; | |
1778 | break; | |
1779 | } | |
f77bc6a4 ZX |
1780 | case KVM_INTERRUPT: { |
1781 | struct kvm_interrupt irq; | |
1782 | ||
1783 | r = -EFAULT; | |
1784 | if (copy_from_user(&irq, argp, sizeof irq)) | |
1785 | goto out; | |
1786 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
1787 | if (r) | |
1788 | goto out; | |
1789 | r = 0; | |
1790 | break; | |
1791 | } | |
c4abb7c9 JK |
1792 | case KVM_NMI: { |
1793 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
1794 | if (r) | |
1795 | goto out; | |
1796 | r = 0; | |
1797 | break; | |
1798 | } | |
313a3dc7 CO |
1799 | case KVM_SET_CPUID: { |
1800 | struct kvm_cpuid __user *cpuid_arg = argp; | |
1801 | struct kvm_cpuid cpuid; | |
1802 | ||
1803 | r = -EFAULT; | |
1804 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1805 | goto out; | |
1806 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
1807 | if (r) | |
1808 | goto out; | |
1809 | break; | |
1810 | } | |
07716717 DK |
1811 | case KVM_SET_CPUID2: { |
1812 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1813 | struct kvm_cpuid2 cpuid; | |
1814 | ||
1815 | r = -EFAULT; | |
1816 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1817 | goto out; | |
1818 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 1819 | cpuid_arg->entries); |
07716717 DK |
1820 | if (r) |
1821 | goto out; | |
1822 | break; | |
1823 | } | |
1824 | case KVM_GET_CPUID2: { | |
1825 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1826 | struct kvm_cpuid2 cpuid; | |
1827 | ||
1828 | r = -EFAULT; | |
1829 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1830 | goto out; | |
1831 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 1832 | cpuid_arg->entries); |
07716717 DK |
1833 | if (r) |
1834 | goto out; | |
1835 | r = -EFAULT; | |
1836 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1837 | goto out; | |
1838 | r = 0; | |
1839 | break; | |
1840 | } | |
313a3dc7 CO |
1841 | case KVM_GET_MSRS: |
1842 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
1843 | break; | |
1844 | case KVM_SET_MSRS: | |
1845 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
1846 | break; | |
b209749f AK |
1847 | case KVM_TPR_ACCESS_REPORTING: { |
1848 | struct kvm_tpr_access_ctl tac; | |
1849 | ||
1850 | r = -EFAULT; | |
1851 | if (copy_from_user(&tac, argp, sizeof tac)) | |
1852 | goto out; | |
1853 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
1854 | if (r) | |
1855 | goto out; | |
1856 | r = -EFAULT; | |
1857 | if (copy_to_user(argp, &tac, sizeof tac)) | |
1858 | goto out; | |
1859 | r = 0; | |
1860 | break; | |
1861 | }; | |
b93463aa AK |
1862 | case KVM_SET_VAPIC_ADDR: { |
1863 | struct kvm_vapic_addr va; | |
1864 | ||
1865 | r = -EINVAL; | |
1866 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1867 | goto out; | |
1868 | r = -EFAULT; | |
1869 | if (copy_from_user(&va, argp, sizeof va)) | |
1870 | goto out; | |
1871 | r = 0; | |
1872 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
1873 | break; | |
1874 | } | |
890ca9ae HY |
1875 | case KVM_X86_SETUP_MCE: { |
1876 | u64 mcg_cap; | |
1877 | ||
1878 | r = -EFAULT; | |
1879 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
1880 | goto out; | |
1881 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
1882 | break; | |
1883 | } | |
1884 | case KVM_X86_SET_MCE: { | |
1885 | struct kvm_x86_mce mce; | |
1886 | ||
1887 | r = -EFAULT; | |
1888 | if (copy_from_user(&mce, argp, sizeof mce)) | |
1889 | goto out; | |
1890 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
1891 | break; | |
1892 | } | |
313a3dc7 CO |
1893 | default: |
1894 | r = -EINVAL; | |
1895 | } | |
1896 | out: | |
7a6ce84c | 1897 | kfree(lapic); |
313a3dc7 CO |
1898 | return r; |
1899 | } | |
1900 | ||
1fe779f8 CO |
1901 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
1902 | { | |
1903 | int ret; | |
1904 | ||
1905 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
1906 | return -1; | |
1907 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
1908 | return ret; | |
1909 | } | |
1910 | ||
b927a3ce SY |
1911 | static int kvm_vm_ioctl_set_identity_map_addr(struct kvm *kvm, |
1912 | u64 ident_addr) | |
1913 | { | |
1914 | kvm->arch.ept_identity_map_addr = ident_addr; | |
1915 | return 0; | |
1916 | } | |
1917 | ||
1fe779f8 CO |
1918 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
1919 | u32 kvm_nr_mmu_pages) | |
1920 | { | |
1921 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
1922 | return -EINVAL; | |
1923 | ||
72dc67a6 | 1924 | down_write(&kvm->slots_lock); |
7c8a83b7 | 1925 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
1926 | |
1927 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 1928 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 1929 | |
7c8a83b7 | 1930 | spin_unlock(&kvm->mmu_lock); |
72dc67a6 | 1931 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1932 | return 0; |
1933 | } | |
1934 | ||
1935 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
1936 | { | |
f05e70ac | 1937 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
1938 | } |
1939 | ||
e9f85cde ZX |
1940 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1941 | { | |
1942 | int i; | |
1943 | struct kvm_mem_alias *alias; | |
1944 | ||
d69fb81f ZX |
1945 | for (i = 0; i < kvm->arch.naliases; ++i) { |
1946 | alias = &kvm->arch.aliases[i]; | |
e9f85cde ZX |
1947 | if (gfn >= alias->base_gfn |
1948 | && gfn < alias->base_gfn + alias->npages) | |
1949 | return alias->target_gfn + gfn - alias->base_gfn; | |
1950 | } | |
1951 | return gfn; | |
1952 | } | |
1953 | ||
1fe779f8 CO |
1954 | /* |
1955 | * Set a new alias region. Aliases map a portion of physical memory into | |
1956 | * another portion. This is useful for memory windows, for example the PC | |
1957 | * VGA region. | |
1958 | */ | |
1959 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
1960 | struct kvm_memory_alias *alias) | |
1961 | { | |
1962 | int r, n; | |
1963 | struct kvm_mem_alias *p; | |
1964 | ||
1965 | r = -EINVAL; | |
1966 | /* General sanity checks */ | |
1967 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
1968 | goto out; | |
1969 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
1970 | goto out; | |
1971 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
1972 | goto out; | |
1973 | if (alias->guest_phys_addr + alias->memory_size | |
1974 | < alias->guest_phys_addr) | |
1975 | goto out; | |
1976 | if (alias->target_phys_addr + alias->memory_size | |
1977 | < alias->target_phys_addr) | |
1978 | goto out; | |
1979 | ||
72dc67a6 | 1980 | down_write(&kvm->slots_lock); |
a1708ce8 | 1981 | spin_lock(&kvm->mmu_lock); |
1fe779f8 | 1982 | |
d69fb81f | 1983 | p = &kvm->arch.aliases[alias->slot]; |
1fe779f8 CO |
1984 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
1985 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
1986 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
1987 | ||
1988 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
d69fb81f | 1989 | if (kvm->arch.aliases[n - 1].npages) |
1fe779f8 | 1990 | break; |
d69fb81f | 1991 | kvm->arch.naliases = n; |
1fe779f8 | 1992 | |
a1708ce8 | 1993 | spin_unlock(&kvm->mmu_lock); |
1fe779f8 CO |
1994 | kvm_mmu_zap_all(kvm); |
1995 | ||
72dc67a6 | 1996 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1997 | |
1998 | return 0; | |
1999 | ||
2000 | out: | |
2001 | return r; | |
2002 | } | |
2003 | ||
2004 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2005 | { | |
2006 | int r; | |
2007 | ||
2008 | r = 0; | |
2009 | switch (chip->chip_id) { | |
2010 | case KVM_IRQCHIP_PIC_MASTER: | |
2011 | memcpy(&chip->chip.pic, | |
2012 | &pic_irqchip(kvm)->pics[0], | |
2013 | sizeof(struct kvm_pic_state)); | |
2014 | break; | |
2015 | case KVM_IRQCHIP_PIC_SLAVE: | |
2016 | memcpy(&chip->chip.pic, | |
2017 | &pic_irqchip(kvm)->pics[1], | |
2018 | sizeof(struct kvm_pic_state)); | |
2019 | break; | |
2020 | case KVM_IRQCHIP_IOAPIC: | |
2021 | memcpy(&chip->chip.ioapic, | |
2022 | ioapic_irqchip(kvm), | |
2023 | sizeof(struct kvm_ioapic_state)); | |
2024 | break; | |
2025 | default: | |
2026 | r = -EINVAL; | |
2027 | break; | |
2028 | } | |
2029 | return r; | |
2030 | } | |
2031 | ||
2032 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2033 | { | |
2034 | int r; | |
2035 | ||
2036 | r = 0; | |
2037 | switch (chip->chip_id) { | |
2038 | case KVM_IRQCHIP_PIC_MASTER: | |
894a9c55 | 2039 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2040 | memcpy(&pic_irqchip(kvm)->pics[0], |
2041 | &chip->chip.pic, | |
2042 | sizeof(struct kvm_pic_state)); | |
894a9c55 | 2043 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2044 | break; |
2045 | case KVM_IRQCHIP_PIC_SLAVE: | |
894a9c55 | 2046 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2047 | memcpy(&pic_irqchip(kvm)->pics[1], |
2048 | &chip->chip.pic, | |
2049 | sizeof(struct kvm_pic_state)); | |
894a9c55 | 2050 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2051 | break; |
2052 | case KVM_IRQCHIP_IOAPIC: | |
894a9c55 | 2053 | mutex_lock(&kvm->irq_lock); |
1fe779f8 CO |
2054 | memcpy(ioapic_irqchip(kvm), |
2055 | &chip->chip.ioapic, | |
2056 | sizeof(struct kvm_ioapic_state)); | |
894a9c55 | 2057 | mutex_unlock(&kvm->irq_lock); |
1fe779f8 CO |
2058 | break; |
2059 | default: | |
2060 | r = -EINVAL; | |
2061 | break; | |
2062 | } | |
2063 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2064 | return r; | |
2065 | } | |
2066 | ||
e0f63cb9 SY |
2067 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2068 | { | |
2069 | int r = 0; | |
2070 | ||
894a9c55 | 2071 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2072 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2073 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2074 | return r; |
2075 | } | |
2076 | ||
2077 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2078 | { | |
2079 | int r = 0; | |
2080 | ||
894a9c55 | 2081 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2082 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2083 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2084 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2085 | return r; | |
2086 | } | |
2087 | ||
2088 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2089 | { | |
2090 | int r = 0; | |
2091 | ||
2092 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2093 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2094 | sizeof(ps->channels)); | |
2095 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2096 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2097 | return r; | |
2098 | } | |
2099 | ||
2100 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2101 | { | |
2102 | int r = 0, start = 0; | |
2103 | u32 prev_legacy, cur_legacy; | |
2104 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2105 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2106 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2107 | if (!prev_legacy && cur_legacy) | |
2108 | start = 1; | |
2109 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2110 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2111 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2112 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2113 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2114 | return r; |
2115 | } | |
2116 | ||
52d939a0 MT |
2117 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2118 | struct kvm_reinject_control *control) | |
2119 | { | |
2120 | if (!kvm->arch.vpit) | |
2121 | return -ENXIO; | |
894a9c55 | 2122 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2123 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2124 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2125 | return 0; |
2126 | } | |
2127 | ||
5bb064dc ZX |
2128 | /* |
2129 | * Get (and clear) the dirty memory log for a memory slot. | |
2130 | */ | |
2131 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2132 | struct kvm_dirty_log *log) | |
2133 | { | |
2134 | int r; | |
2135 | int n; | |
2136 | struct kvm_memory_slot *memslot; | |
2137 | int is_dirty = 0; | |
2138 | ||
72dc67a6 | 2139 | down_write(&kvm->slots_lock); |
5bb064dc ZX |
2140 | |
2141 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
2142 | if (r) | |
2143 | goto out; | |
2144 | ||
2145 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2146 | if (is_dirty) { | |
7c8a83b7 | 2147 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2148 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2149 | spin_unlock(&kvm->mmu_lock); |
5bb064dc ZX |
2150 | kvm_flush_remote_tlbs(kvm); |
2151 | memslot = &kvm->memslots[log->slot]; | |
2152 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
2153 | memset(memslot->dirty_bitmap, 0, n); | |
2154 | } | |
2155 | r = 0; | |
2156 | out: | |
72dc67a6 | 2157 | up_write(&kvm->slots_lock); |
5bb064dc ZX |
2158 | return r; |
2159 | } | |
2160 | ||
1fe779f8 CO |
2161 | long kvm_arch_vm_ioctl(struct file *filp, |
2162 | unsigned int ioctl, unsigned long arg) | |
2163 | { | |
2164 | struct kvm *kvm = filp->private_data; | |
2165 | void __user *argp = (void __user *)arg; | |
2166 | int r = -EINVAL; | |
f0d66275 DH |
2167 | /* |
2168 | * This union makes it completely explicit to gcc-3.x | |
2169 | * that these two variables' stack usage should be | |
2170 | * combined, not added together. | |
2171 | */ | |
2172 | union { | |
2173 | struct kvm_pit_state ps; | |
e9f42757 | 2174 | struct kvm_pit_state2 ps2; |
f0d66275 | 2175 | struct kvm_memory_alias alias; |
c5ff41ce | 2176 | struct kvm_pit_config pit_config; |
f0d66275 | 2177 | } u; |
1fe779f8 CO |
2178 | |
2179 | switch (ioctl) { | |
2180 | case KVM_SET_TSS_ADDR: | |
2181 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2182 | if (r < 0) | |
2183 | goto out; | |
2184 | break; | |
b927a3ce SY |
2185 | case KVM_SET_IDENTITY_MAP_ADDR: { |
2186 | u64 ident_addr; | |
2187 | ||
2188 | r = -EFAULT; | |
2189 | if (copy_from_user(&ident_addr, argp, sizeof ident_addr)) | |
2190 | goto out; | |
2191 | r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr); | |
2192 | if (r < 0) | |
2193 | goto out; | |
2194 | break; | |
2195 | } | |
1fe779f8 CO |
2196 | case KVM_SET_MEMORY_REGION: { |
2197 | struct kvm_memory_region kvm_mem; | |
2198 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2199 | ||
2200 | r = -EFAULT; | |
2201 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
2202 | goto out; | |
2203 | kvm_userspace_mem.slot = kvm_mem.slot; | |
2204 | kvm_userspace_mem.flags = kvm_mem.flags; | |
2205 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
2206 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
2207 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2208 | if (r) | |
2209 | goto out; | |
2210 | break; | |
2211 | } | |
2212 | case KVM_SET_NR_MMU_PAGES: | |
2213 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2214 | if (r) | |
2215 | goto out; | |
2216 | break; | |
2217 | case KVM_GET_NR_MMU_PAGES: | |
2218 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2219 | break; | |
f0d66275 | 2220 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 2221 | r = -EFAULT; |
f0d66275 | 2222 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 2223 | goto out; |
f0d66275 | 2224 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
2225 | if (r) |
2226 | goto out; | |
2227 | break; | |
1fe779f8 CO |
2228 | case KVM_CREATE_IRQCHIP: |
2229 | r = -ENOMEM; | |
d7deeeb0 ZX |
2230 | kvm->arch.vpic = kvm_create_pic(kvm); |
2231 | if (kvm->arch.vpic) { | |
1fe779f8 CO |
2232 | r = kvm_ioapic_init(kvm); |
2233 | if (r) { | |
d7deeeb0 ZX |
2234 | kfree(kvm->arch.vpic); |
2235 | kvm->arch.vpic = NULL; | |
1fe779f8 CO |
2236 | goto out; |
2237 | } | |
2238 | } else | |
2239 | goto out; | |
399ec807 AK |
2240 | r = kvm_setup_default_irq_routing(kvm); |
2241 | if (r) { | |
2242 | kfree(kvm->arch.vpic); | |
2243 | kfree(kvm->arch.vioapic); | |
2244 | goto out; | |
2245 | } | |
1fe779f8 | 2246 | break; |
7837699f | 2247 | case KVM_CREATE_PIT: |
c5ff41ce JK |
2248 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
2249 | goto create_pit; | |
2250 | case KVM_CREATE_PIT2: | |
2251 | r = -EFAULT; | |
2252 | if (copy_from_user(&u.pit_config, argp, | |
2253 | sizeof(struct kvm_pit_config))) | |
2254 | goto out; | |
2255 | create_pit: | |
108b5669 | 2256 | down_write(&kvm->slots_lock); |
269e05e4 AK |
2257 | r = -EEXIST; |
2258 | if (kvm->arch.vpit) | |
2259 | goto create_pit_unlock; | |
7837699f | 2260 | r = -ENOMEM; |
c5ff41ce | 2261 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
2262 | if (kvm->arch.vpit) |
2263 | r = 0; | |
269e05e4 | 2264 | create_pit_unlock: |
108b5669 | 2265 | up_write(&kvm->slots_lock); |
7837699f | 2266 | break; |
4925663a | 2267 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
2268 | case KVM_IRQ_LINE: { |
2269 | struct kvm_irq_level irq_event; | |
2270 | ||
2271 | r = -EFAULT; | |
2272 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2273 | goto out; | |
2274 | if (irqchip_in_kernel(kvm)) { | |
4925663a | 2275 | __s32 status; |
fa40a821 | 2276 | mutex_lock(&kvm->irq_lock); |
4925663a GN |
2277 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
2278 | irq_event.irq, irq_event.level); | |
fa40a821 | 2279 | mutex_unlock(&kvm->irq_lock); |
4925663a GN |
2280 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
2281 | irq_event.status = status; | |
2282 | if (copy_to_user(argp, &irq_event, | |
2283 | sizeof irq_event)) | |
2284 | goto out; | |
2285 | } | |
1fe779f8 CO |
2286 | r = 0; |
2287 | } | |
2288 | break; | |
2289 | } | |
2290 | case KVM_GET_IRQCHIP: { | |
2291 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2292 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2293 | |
f0d66275 DH |
2294 | r = -ENOMEM; |
2295 | if (!chip) | |
1fe779f8 | 2296 | goto out; |
f0d66275 DH |
2297 | r = -EFAULT; |
2298 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2299 | goto get_irqchip_out; | |
1fe779f8 CO |
2300 | r = -ENXIO; |
2301 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2302 | goto get_irqchip_out; |
2303 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 2304 | if (r) |
f0d66275 | 2305 | goto get_irqchip_out; |
1fe779f8 | 2306 | r = -EFAULT; |
f0d66275 DH |
2307 | if (copy_to_user(argp, chip, sizeof *chip)) |
2308 | goto get_irqchip_out; | |
1fe779f8 | 2309 | r = 0; |
f0d66275 DH |
2310 | get_irqchip_out: |
2311 | kfree(chip); | |
2312 | if (r) | |
2313 | goto out; | |
1fe779f8 CO |
2314 | break; |
2315 | } | |
2316 | case KVM_SET_IRQCHIP: { | |
2317 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2318 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2319 | |
f0d66275 DH |
2320 | r = -ENOMEM; |
2321 | if (!chip) | |
1fe779f8 | 2322 | goto out; |
f0d66275 DH |
2323 | r = -EFAULT; |
2324 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2325 | goto set_irqchip_out; | |
1fe779f8 CO |
2326 | r = -ENXIO; |
2327 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2328 | goto set_irqchip_out; |
2329 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 2330 | if (r) |
f0d66275 | 2331 | goto set_irqchip_out; |
1fe779f8 | 2332 | r = 0; |
f0d66275 DH |
2333 | set_irqchip_out: |
2334 | kfree(chip); | |
2335 | if (r) | |
2336 | goto out; | |
1fe779f8 CO |
2337 | break; |
2338 | } | |
e0f63cb9 | 2339 | case KVM_GET_PIT: { |
e0f63cb9 | 2340 | r = -EFAULT; |
f0d66275 | 2341 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2342 | goto out; |
2343 | r = -ENXIO; | |
2344 | if (!kvm->arch.vpit) | |
2345 | goto out; | |
f0d66275 | 2346 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
2347 | if (r) |
2348 | goto out; | |
2349 | r = -EFAULT; | |
f0d66275 | 2350 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2351 | goto out; |
2352 | r = 0; | |
2353 | break; | |
2354 | } | |
2355 | case KVM_SET_PIT: { | |
e0f63cb9 | 2356 | r = -EFAULT; |
f0d66275 | 2357 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
2358 | goto out; |
2359 | r = -ENXIO; | |
2360 | if (!kvm->arch.vpit) | |
2361 | goto out; | |
f0d66275 | 2362 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
2363 | if (r) |
2364 | goto out; | |
2365 | r = 0; | |
2366 | break; | |
2367 | } | |
e9f42757 BK |
2368 | case KVM_GET_PIT2: { |
2369 | r = -ENXIO; | |
2370 | if (!kvm->arch.vpit) | |
2371 | goto out; | |
2372 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
2373 | if (r) | |
2374 | goto out; | |
2375 | r = -EFAULT; | |
2376 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
2377 | goto out; | |
2378 | r = 0; | |
2379 | break; | |
2380 | } | |
2381 | case KVM_SET_PIT2: { | |
2382 | r = -EFAULT; | |
2383 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
2384 | goto out; | |
2385 | r = -ENXIO; | |
2386 | if (!kvm->arch.vpit) | |
2387 | goto out; | |
2388 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
2389 | if (r) | |
2390 | goto out; | |
2391 | r = 0; | |
2392 | break; | |
2393 | } | |
52d939a0 MT |
2394 | case KVM_REINJECT_CONTROL: { |
2395 | struct kvm_reinject_control control; | |
2396 | r = -EFAULT; | |
2397 | if (copy_from_user(&control, argp, sizeof(control))) | |
2398 | goto out; | |
2399 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
2400 | if (r) | |
2401 | goto out; | |
2402 | r = 0; | |
2403 | break; | |
2404 | } | |
1fe779f8 CO |
2405 | default: |
2406 | ; | |
2407 | } | |
2408 | out: | |
2409 | return r; | |
2410 | } | |
2411 | ||
a16b043c | 2412 | static void kvm_init_msr_list(void) |
043405e1 CO |
2413 | { |
2414 | u32 dummy[2]; | |
2415 | unsigned i, j; | |
2416 | ||
2417 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2418 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2419 | continue; | |
2420 | if (j < i) | |
2421 | msrs_to_save[j] = msrs_to_save[i]; | |
2422 | j++; | |
2423 | } | |
2424 | num_msrs_to_save = j; | |
2425 | } | |
2426 | ||
bda9020e MT |
2427 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
2428 | const void *v) | |
bbd9b64e | 2429 | { |
bda9020e MT |
2430 | if (vcpu->arch.apic && |
2431 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
2432 | return 0; | |
bbd9b64e | 2433 | |
bda9020e | 2434 | return kvm_io_bus_write(&vcpu->kvm->mmio_bus, addr, len, v); |
bbd9b64e CO |
2435 | } |
2436 | ||
bda9020e | 2437 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 2438 | { |
bda9020e MT |
2439 | if (vcpu->arch.apic && |
2440 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
2441 | return 0; | |
bbd9b64e | 2442 | |
bda9020e | 2443 | return kvm_io_bus_read(&vcpu->kvm->mmio_bus, addr, len, v); |
bbd9b64e CO |
2444 | } |
2445 | ||
cded19f3 HE |
2446 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2447 | struct kvm_vcpu *vcpu) | |
bbd9b64e CO |
2448 | { |
2449 | void *data = val; | |
10589a46 | 2450 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
2451 | |
2452 | while (bytes) { | |
ad312c7c | 2453 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e | 2454 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 2455 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
2456 | int ret; |
2457 | ||
10589a46 MT |
2458 | if (gpa == UNMAPPED_GVA) { |
2459 | r = X86EMUL_PROPAGATE_FAULT; | |
2460 | goto out; | |
2461 | } | |
77c2002e | 2462 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 MT |
2463 | if (ret < 0) { |
2464 | r = X86EMUL_UNHANDLEABLE; | |
2465 | goto out; | |
2466 | } | |
bbd9b64e | 2467 | |
77c2002e IE |
2468 | bytes -= toread; |
2469 | data += toread; | |
2470 | addr += toread; | |
bbd9b64e | 2471 | } |
10589a46 | 2472 | out: |
10589a46 | 2473 | return r; |
bbd9b64e | 2474 | } |
77c2002e | 2475 | |
cded19f3 HE |
2476 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2477 | struct kvm_vcpu *vcpu) | |
77c2002e IE |
2478 | { |
2479 | void *data = val; | |
2480 | int r = X86EMUL_CONTINUE; | |
2481 | ||
2482 | while (bytes) { | |
2483 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); | |
2484 | unsigned offset = addr & (PAGE_SIZE-1); | |
2485 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
2486 | int ret; | |
2487 | ||
2488 | if (gpa == UNMAPPED_GVA) { | |
2489 | r = X86EMUL_PROPAGATE_FAULT; | |
2490 | goto out; | |
2491 | } | |
2492 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
2493 | if (ret < 0) { | |
2494 | r = X86EMUL_UNHANDLEABLE; | |
2495 | goto out; | |
2496 | } | |
2497 | ||
2498 | bytes -= towrite; | |
2499 | data += towrite; | |
2500 | addr += towrite; | |
2501 | } | |
2502 | out: | |
2503 | return r; | |
2504 | } | |
2505 | ||
bbd9b64e | 2506 | |
bbd9b64e CO |
2507 | static int emulator_read_emulated(unsigned long addr, |
2508 | void *val, | |
2509 | unsigned int bytes, | |
2510 | struct kvm_vcpu *vcpu) | |
2511 | { | |
bbd9b64e CO |
2512 | gpa_t gpa; |
2513 | ||
2514 | if (vcpu->mmio_read_completed) { | |
2515 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
2516 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
2517 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
2518 | vcpu->mmio_read_completed = 0; |
2519 | return X86EMUL_CONTINUE; | |
2520 | } | |
2521 | ||
ad312c7c | 2522 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2523 | |
2524 | /* For APIC access vmexit */ | |
2525 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2526 | goto mmio; | |
2527 | ||
77c2002e IE |
2528 | if (kvm_read_guest_virt(addr, val, bytes, vcpu) |
2529 | == X86EMUL_CONTINUE) | |
bbd9b64e CO |
2530 | return X86EMUL_CONTINUE; |
2531 | if (gpa == UNMAPPED_GVA) | |
2532 | return X86EMUL_PROPAGATE_FAULT; | |
2533 | ||
2534 | mmio: | |
2535 | /* | |
2536 | * Is this MMIO handled locally? | |
2537 | */ | |
aec51dc4 AK |
2538 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
2539 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e | 2540 | return X86EMUL_CONTINUE; |
aec51dc4 AK |
2541 | } |
2542 | ||
2543 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
2544 | |
2545 | vcpu->mmio_needed = 1; | |
2546 | vcpu->mmio_phys_addr = gpa; | |
2547 | vcpu->mmio_size = bytes; | |
2548 | vcpu->mmio_is_write = 0; | |
2549 | ||
2550 | return X86EMUL_UNHANDLEABLE; | |
2551 | } | |
2552 | ||
3200f405 | 2553 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 2554 | const void *val, int bytes) |
bbd9b64e CO |
2555 | { |
2556 | int ret; | |
2557 | ||
2558 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 2559 | if (ret < 0) |
bbd9b64e | 2560 | return 0; |
ad218f85 | 2561 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
2562 | return 1; |
2563 | } | |
2564 | ||
2565 | static int emulator_write_emulated_onepage(unsigned long addr, | |
2566 | const void *val, | |
2567 | unsigned int bytes, | |
2568 | struct kvm_vcpu *vcpu) | |
2569 | { | |
10589a46 MT |
2570 | gpa_t gpa; |
2571 | ||
10589a46 | 2572 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2573 | |
2574 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 2575 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
2576 | return X86EMUL_PROPAGATE_FAULT; |
2577 | } | |
2578 | ||
2579 | /* For APIC access vmexit */ | |
2580 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2581 | goto mmio; | |
2582 | ||
2583 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
2584 | return X86EMUL_CONTINUE; | |
2585 | ||
2586 | mmio: | |
aec51dc4 | 2587 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
2588 | /* |
2589 | * Is this MMIO handled locally? | |
2590 | */ | |
bda9020e | 2591 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 2592 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
2593 | |
2594 | vcpu->mmio_needed = 1; | |
2595 | vcpu->mmio_phys_addr = gpa; | |
2596 | vcpu->mmio_size = bytes; | |
2597 | vcpu->mmio_is_write = 1; | |
2598 | memcpy(vcpu->mmio_data, val, bytes); | |
2599 | ||
2600 | return X86EMUL_CONTINUE; | |
2601 | } | |
2602 | ||
2603 | int emulator_write_emulated(unsigned long addr, | |
2604 | const void *val, | |
2605 | unsigned int bytes, | |
2606 | struct kvm_vcpu *vcpu) | |
2607 | { | |
2608 | /* Crossing a page boundary? */ | |
2609 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
2610 | int rc, now; | |
2611 | ||
2612 | now = -addr & ~PAGE_MASK; | |
2613 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
2614 | if (rc != X86EMUL_CONTINUE) | |
2615 | return rc; | |
2616 | addr += now; | |
2617 | val += now; | |
2618 | bytes -= now; | |
2619 | } | |
2620 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
2621 | } | |
2622 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
2623 | ||
2624 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
2625 | const void *old, | |
2626 | const void *new, | |
2627 | unsigned int bytes, | |
2628 | struct kvm_vcpu *vcpu) | |
2629 | { | |
2630 | static int reported; | |
2631 | ||
2632 | if (!reported) { | |
2633 | reported = 1; | |
2634 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
2635 | } | |
2bacc55c MT |
2636 | #ifndef CONFIG_X86_64 |
2637 | /* guests cmpxchg8b have to be emulated atomically */ | |
2638 | if (bytes == 8) { | |
10589a46 | 2639 | gpa_t gpa; |
2bacc55c | 2640 | struct page *page; |
c0b49b0d | 2641 | char *kaddr; |
2bacc55c MT |
2642 | u64 val; |
2643 | ||
10589a46 MT |
2644 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
2645 | ||
2bacc55c MT |
2646 | if (gpa == UNMAPPED_GVA || |
2647 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2648 | goto emul_write; | |
2649 | ||
2650 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
2651 | goto emul_write; | |
2652 | ||
2653 | val = *(u64 *)new; | |
72dc67a6 | 2654 | |
2bacc55c | 2655 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 2656 | |
c0b49b0d AM |
2657 | kaddr = kmap_atomic(page, KM_USER0); |
2658 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
2659 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
2660 | kvm_release_page_dirty(page); |
2661 | } | |
3200f405 | 2662 | emul_write: |
2bacc55c MT |
2663 | #endif |
2664 | ||
bbd9b64e CO |
2665 | return emulator_write_emulated(addr, new, bytes, vcpu); |
2666 | } | |
2667 | ||
2668 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
2669 | { | |
2670 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
2671 | } | |
2672 | ||
2673 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
2674 | { | |
a7052897 | 2675 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
2676 | return X86EMUL_CONTINUE; |
2677 | } | |
2678 | ||
2679 | int emulate_clts(struct kvm_vcpu *vcpu) | |
2680 | { | |
ad312c7c | 2681 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
2682 | return X86EMUL_CONTINUE; |
2683 | } | |
2684 | ||
2685 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
2686 | { | |
2687 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
2688 | ||
2689 | switch (dr) { | |
2690 | case 0 ... 3: | |
2691 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
2692 | return X86EMUL_CONTINUE; | |
2693 | default: | |
b8688d51 | 2694 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
bbd9b64e CO |
2695 | return X86EMUL_UNHANDLEABLE; |
2696 | } | |
2697 | } | |
2698 | ||
2699 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
2700 | { | |
2701 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
2702 | int exception; | |
2703 | ||
2704 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
2705 | if (exception) { | |
2706 | /* FIXME: better handling */ | |
2707 | return X86EMUL_UNHANDLEABLE; | |
2708 | } | |
2709 | return X86EMUL_CONTINUE; | |
2710 | } | |
2711 | ||
2712 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
2713 | { | |
bbd9b64e | 2714 | u8 opcodes[4]; |
5fdbf976 | 2715 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
2716 | unsigned long rip_linear; |
2717 | ||
f76c710d | 2718 | if (!printk_ratelimit()) |
bbd9b64e CO |
2719 | return; |
2720 | ||
25be4608 GC |
2721 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
2722 | ||
77c2002e | 2723 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu); |
bbd9b64e CO |
2724 | |
2725 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
2726 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
2727 | } |
2728 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
2729 | ||
14af3f3c | 2730 | static struct x86_emulate_ops emulate_ops = { |
77c2002e | 2731 | .read_std = kvm_read_guest_virt, |
bbd9b64e CO |
2732 | .read_emulated = emulator_read_emulated, |
2733 | .write_emulated = emulator_write_emulated, | |
2734 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
2735 | }; | |
2736 | ||
5fdbf976 MT |
2737 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
2738 | { | |
2739 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2740 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
2741 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
2742 | vcpu->arch.regs_dirty = ~0; | |
2743 | } | |
2744 | ||
bbd9b64e CO |
2745 | int emulate_instruction(struct kvm_vcpu *vcpu, |
2746 | struct kvm_run *run, | |
2747 | unsigned long cr2, | |
2748 | u16 error_code, | |
571008da | 2749 | int emulation_type) |
bbd9b64e | 2750 | { |
310b5d30 | 2751 | int r, shadow_mask; |
571008da | 2752 | struct decode_cache *c; |
bbd9b64e | 2753 | |
26eef70c | 2754 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 2755 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 MT |
2756 | /* |
2757 | * TODO: fix x86_emulate.c to use guest_read/write_register | |
2758 | * instead of direct ->regs accesses, can save hundred cycles | |
2759 | * on Intel for instructions that don't read/change RSP, for | |
2760 | * for example. | |
2761 | */ | |
2762 | cache_all_regs(vcpu); | |
bbd9b64e CO |
2763 | |
2764 | vcpu->mmio_is_write = 0; | |
ad312c7c | 2765 | vcpu->arch.pio.string = 0; |
bbd9b64e | 2766 | |
571008da | 2767 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
2768 | int cs_db, cs_l; |
2769 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
2770 | ||
ad312c7c ZX |
2771 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
2772 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
2773 | vcpu->arch.emulate_ctxt.mode = | |
2774 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
2775 | ? X86EMUL_MODE_REAL : cs_l |
2776 | ? X86EMUL_MODE_PROT64 : cs_db | |
2777 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
2778 | ||
ad312c7c | 2779 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da | 2780 | |
0cb5762e AP |
2781 | /* Only allow emulation of specific instructions on #UD |
2782 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
571008da | 2783 | c = &vcpu->arch.emulate_ctxt.decode; |
0cb5762e AP |
2784 | if (emulation_type & EMULTYPE_TRAP_UD) { |
2785 | if (!c->twobyte) | |
2786 | return EMULATE_FAIL; | |
2787 | switch (c->b) { | |
2788 | case 0x01: /* VMMCALL */ | |
2789 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
2790 | return EMULATE_FAIL; | |
2791 | break; | |
2792 | case 0x34: /* sysenter */ | |
2793 | case 0x35: /* sysexit */ | |
2794 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
2795 | return EMULATE_FAIL; | |
2796 | break; | |
2797 | case 0x05: /* syscall */ | |
2798 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
2799 | return EMULATE_FAIL; | |
2800 | break; | |
2801 | default: | |
2802 | return EMULATE_FAIL; | |
2803 | } | |
2804 | ||
2805 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
2806 | return EMULATE_FAIL; | |
2807 | } | |
571008da | 2808 | |
f2b5756b | 2809 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 2810 | if (r) { |
f2b5756b | 2811 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
2812 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
2813 | return EMULATE_DONE; | |
2814 | return EMULATE_FAIL; | |
2815 | } | |
2816 | } | |
2817 | ||
ba8afb6b GN |
2818 | if (emulation_type & EMULTYPE_SKIP) { |
2819 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
2820 | return EMULATE_DONE; | |
2821 | } | |
2822 | ||
ad312c7c | 2823 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
310b5d30 GC |
2824 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
2825 | ||
2826 | if (r == 0) | |
2827 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); | |
bbd9b64e | 2828 | |
ad312c7c | 2829 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
2830 | return EMULATE_DO_MMIO; |
2831 | ||
2832 | if ((r || vcpu->mmio_is_write) && run) { | |
2833 | run->exit_reason = KVM_EXIT_MMIO; | |
2834 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
2835 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
2836 | run->mmio.len = vcpu->mmio_size; | |
2837 | run->mmio.is_write = vcpu->mmio_is_write; | |
2838 | } | |
2839 | ||
2840 | if (r) { | |
2841 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
2842 | return EMULATE_DONE; | |
2843 | if (!vcpu->mmio_needed) { | |
2844 | kvm_report_emulation_failure(vcpu, "mmio"); | |
2845 | return EMULATE_FAIL; | |
2846 | } | |
2847 | return EMULATE_DO_MMIO; | |
2848 | } | |
2849 | ||
ad312c7c | 2850 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
2851 | |
2852 | if (vcpu->mmio_is_write) { | |
2853 | vcpu->mmio_needed = 0; | |
2854 | return EMULATE_DO_MMIO; | |
2855 | } | |
2856 | ||
2857 | return EMULATE_DONE; | |
2858 | } | |
2859 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
2860 | ||
de7d789a CO |
2861 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
2862 | { | |
ad312c7c | 2863 | void *p = vcpu->arch.pio_data; |
0f346074 | 2864 | gva_t q = vcpu->arch.pio.guest_gva; |
de7d789a | 2865 | unsigned bytes; |
0f346074 | 2866 | int ret; |
de7d789a | 2867 | |
ad312c7c ZX |
2868 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
2869 | if (vcpu->arch.pio.in) | |
0f346074 | 2870 | ret = kvm_write_guest_virt(q, p, bytes, vcpu); |
de7d789a | 2871 | else |
0f346074 IE |
2872 | ret = kvm_read_guest_virt(q, p, bytes, vcpu); |
2873 | return ret; | |
de7d789a CO |
2874 | } |
2875 | ||
2876 | int complete_pio(struct kvm_vcpu *vcpu) | |
2877 | { | |
ad312c7c | 2878 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
2879 | long delta; |
2880 | int r; | |
5fdbf976 | 2881 | unsigned long val; |
de7d789a CO |
2882 | |
2883 | if (!io->string) { | |
5fdbf976 MT |
2884 | if (io->in) { |
2885 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2886 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
2887 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
2888 | } | |
de7d789a CO |
2889 | } else { |
2890 | if (io->in) { | |
2891 | r = pio_copy_data(vcpu); | |
5fdbf976 | 2892 | if (r) |
de7d789a | 2893 | return r; |
de7d789a CO |
2894 | } |
2895 | ||
2896 | delta = 1; | |
2897 | if (io->rep) { | |
2898 | delta *= io->cur_count; | |
2899 | /* | |
2900 | * The size of the register should really depend on | |
2901 | * current address size. | |
2902 | */ | |
5fdbf976 MT |
2903 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
2904 | val -= delta; | |
2905 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
2906 | } |
2907 | if (io->down) | |
2908 | delta = -delta; | |
2909 | delta *= io->size; | |
5fdbf976 MT |
2910 | if (io->in) { |
2911 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
2912 | val += delta; | |
2913 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
2914 | } else { | |
2915 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
2916 | val += delta; | |
2917 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
2918 | } | |
de7d789a CO |
2919 | } |
2920 | ||
de7d789a CO |
2921 | io->count -= io->cur_count; |
2922 | io->cur_count = 0; | |
2923 | ||
2924 | return 0; | |
2925 | } | |
2926 | ||
bda9020e | 2927 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
de7d789a CO |
2928 | { |
2929 | /* TODO: String I/O for in kernel device */ | |
bda9020e | 2930 | int r; |
de7d789a | 2931 | |
ad312c7c | 2932 | if (vcpu->arch.pio.in) |
bda9020e MT |
2933 | r = kvm_io_bus_read(&vcpu->kvm->pio_bus, vcpu->arch.pio.port, |
2934 | vcpu->arch.pio.size, pd); | |
de7d789a | 2935 | else |
bda9020e MT |
2936 | r = kvm_io_bus_write(&vcpu->kvm->pio_bus, vcpu->arch.pio.port, |
2937 | vcpu->arch.pio.size, pd); | |
2938 | return r; | |
de7d789a CO |
2939 | } |
2940 | ||
bda9020e | 2941 | static int pio_string_write(struct kvm_vcpu *vcpu) |
de7d789a | 2942 | { |
ad312c7c ZX |
2943 | struct kvm_pio_request *io = &vcpu->arch.pio; |
2944 | void *pd = vcpu->arch.pio_data; | |
bda9020e | 2945 | int i, r = 0; |
de7d789a | 2946 | |
de7d789a | 2947 | for (i = 0; i < io->cur_count; i++) { |
bda9020e MT |
2948 | if (kvm_io_bus_write(&vcpu->kvm->pio_bus, |
2949 | io->port, io->size, pd)) { | |
2950 | r = -EOPNOTSUPP; | |
2951 | break; | |
2952 | } | |
de7d789a CO |
2953 | pd += io->size; |
2954 | } | |
bda9020e | 2955 | return r; |
de7d789a CO |
2956 | } |
2957 | ||
2958 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2959 | int size, unsigned port) | |
2960 | { | |
5fdbf976 | 2961 | unsigned long val; |
de7d789a CO |
2962 | |
2963 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2964 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2965 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2966 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2967 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
2968 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2969 | vcpu->arch.pio.in = in; | |
2970 | vcpu->arch.pio.string = 0; | |
2971 | vcpu->arch.pio.down = 0; | |
ad312c7c | 2972 | vcpu->arch.pio.rep = 0; |
de7d789a | 2973 | |
229456fc MT |
2974 | trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, |
2975 | size, 1); | |
2714d1d3 | 2976 | |
5fdbf976 MT |
2977 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2978 | memcpy(vcpu->arch.pio_data, &val, 4); | |
de7d789a | 2979 | |
bda9020e | 2980 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { |
de7d789a CO |
2981 | complete_pio(vcpu); |
2982 | return 1; | |
2983 | } | |
2984 | return 0; | |
2985 | } | |
2986 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2987 | ||
2988 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2989 | int size, unsigned long count, int down, | |
2990 | gva_t address, int rep, unsigned port) | |
2991 | { | |
2992 | unsigned now, in_page; | |
0f346074 | 2993 | int ret = 0; |
de7d789a CO |
2994 | |
2995 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2996 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2997 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2998 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2999 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
3000 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
3001 | vcpu->arch.pio.in = in; | |
3002 | vcpu->arch.pio.string = 1; | |
3003 | vcpu->arch.pio.down = down; | |
ad312c7c | 3004 | vcpu->arch.pio.rep = rep; |
de7d789a | 3005 | |
229456fc MT |
3006 | trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, |
3007 | size, count); | |
2714d1d3 | 3008 | |
de7d789a CO |
3009 | if (!count) { |
3010 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
3011 | return 1; | |
3012 | } | |
3013 | ||
3014 | if (!down) | |
3015 | in_page = PAGE_SIZE - offset_in_page(address); | |
3016 | else | |
3017 | in_page = offset_in_page(address) + size; | |
3018 | now = min(count, (unsigned long)in_page / size); | |
0f346074 | 3019 | if (!now) |
de7d789a | 3020 | now = 1; |
de7d789a CO |
3021 | if (down) { |
3022 | /* | |
3023 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
3024 | */ | |
3025 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 3026 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
3027 | return 1; |
3028 | } | |
3029 | vcpu->run->io.count = now; | |
ad312c7c | 3030 | vcpu->arch.pio.cur_count = now; |
de7d789a | 3031 | |
ad312c7c | 3032 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
3033 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
3034 | ||
0f346074 | 3035 | vcpu->arch.pio.guest_gva = address; |
de7d789a | 3036 | |
ad312c7c | 3037 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
3038 | /* string PIO write */ |
3039 | ret = pio_copy_data(vcpu); | |
0f346074 IE |
3040 | if (ret == X86EMUL_PROPAGATE_FAULT) { |
3041 | kvm_inject_gp(vcpu, 0); | |
3042 | return 1; | |
3043 | } | |
bda9020e | 3044 | if (ret == 0 && !pio_string_write(vcpu)) { |
de7d789a | 3045 | complete_pio(vcpu); |
ad312c7c | 3046 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
3047 | ret = 1; |
3048 | } | |
bda9020e MT |
3049 | } |
3050 | /* no string PIO read support yet */ | |
de7d789a CO |
3051 | |
3052 | return ret; | |
3053 | } | |
3054 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
3055 | ||
c8076604 GH |
3056 | static void bounce_off(void *info) |
3057 | { | |
3058 | /* nothing */ | |
3059 | } | |
3060 | ||
3061 | static unsigned int ref_freq; | |
3062 | static unsigned long tsc_khz_ref; | |
3063 | ||
3064 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, | |
3065 | void *data) | |
3066 | { | |
3067 | struct cpufreq_freqs *freq = data; | |
3068 | struct kvm *kvm; | |
3069 | struct kvm_vcpu *vcpu; | |
3070 | int i, send_ipi = 0; | |
3071 | ||
3072 | if (!ref_freq) | |
3073 | ref_freq = freq->old; | |
3074 | ||
3075 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) | |
3076 | return 0; | |
3077 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
3078 | return 0; | |
3079 | per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new); | |
3080 | ||
3081 | spin_lock(&kvm_lock); | |
3082 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 3083 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
3084 | if (vcpu->cpu != freq->cpu) |
3085 | continue; | |
3086 | if (!kvm_request_guest_time_update(vcpu)) | |
3087 | continue; | |
3088 | if (vcpu->cpu != smp_processor_id()) | |
3089 | send_ipi++; | |
3090 | } | |
3091 | } | |
3092 | spin_unlock(&kvm_lock); | |
3093 | ||
3094 | if (freq->old < freq->new && send_ipi) { | |
3095 | /* | |
3096 | * We upscale the frequency. Must make the guest | |
3097 | * doesn't see old kvmclock values while running with | |
3098 | * the new frequency, otherwise we risk the guest sees | |
3099 | * time go backwards. | |
3100 | * | |
3101 | * In case we update the frequency for another cpu | |
3102 | * (which might be in guest context) send an interrupt | |
3103 | * to kick the cpu out of guest context. Next time | |
3104 | * guest context is entered kvmclock will be updated, | |
3105 | * so the guest will not see stale values. | |
3106 | */ | |
3107 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
3108 | } | |
3109 | return 0; | |
3110 | } | |
3111 | ||
3112 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
3113 | .notifier_call = kvmclock_cpufreq_notifier | |
3114 | }; | |
3115 | ||
f8c16bba | 3116 | int kvm_arch_init(void *opaque) |
043405e1 | 3117 | { |
c8076604 | 3118 | int r, cpu; |
f8c16bba ZX |
3119 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
3120 | ||
f8c16bba ZX |
3121 | if (kvm_x86_ops) { |
3122 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
3123 | r = -EEXIST; |
3124 | goto out; | |
f8c16bba ZX |
3125 | } |
3126 | ||
3127 | if (!ops->cpu_has_kvm_support()) { | |
3128 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
3129 | r = -EOPNOTSUPP; |
3130 | goto out; | |
f8c16bba ZX |
3131 | } |
3132 | if (ops->disabled_by_bios()) { | |
3133 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
3134 | r = -EOPNOTSUPP; |
3135 | goto out; | |
f8c16bba ZX |
3136 | } |
3137 | ||
97db56ce AK |
3138 | r = kvm_mmu_module_init(); |
3139 | if (r) | |
3140 | goto out; | |
3141 | ||
3142 | kvm_init_msr_list(); | |
3143 | ||
f8c16bba | 3144 | kvm_x86_ops = ops; |
56c6d28a | 3145 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
3146 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
3147 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 3148 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 GH |
3149 | |
3150 | for_each_possible_cpu(cpu) | |
3151 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
3152 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
3153 | tsc_khz_ref = tsc_khz; | |
3154 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, | |
3155 | CPUFREQ_TRANSITION_NOTIFIER); | |
3156 | } | |
3157 | ||
f8c16bba | 3158 | return 0; |
56c6d28a ZX |
3159 | |
3160 | out: | |
56c6d28a | 3161 | return r; |
043405e1 | 3162 | } |
8776e519 | 3163 | |
f8c16bba ZX |
3164 | void kvm_arch_exit(void) |
3165 | { | |
888d256e JK |
3166 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
3167 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
3168 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 3169 | kvm_x86_ops = NULL; |
56c6d28a ZX |
3170 | kvm_mmu_module_exit(); |
3171 | } | |
f8c16bba | 3172 | |
8776e519 HB |
3173 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
3174 | { | |
3175 | ++vcpu->stat.halt_exits; | |
3176 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 3177 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
3178 | return 1; |
3179 | } else { | |
3180 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
3181 | return 0; | |
3182 | } | |
3183 | } | |
3184 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
3185 | ||
2f333bcb MT |
3186 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
3187 | unsigned long a1) | |
3188 | { | |
3189 | if (is_long_mode(vcpu)) | |
3190 | return a0; | |
3191 | else | |
3192 | return a0 | ((gpa_t)a1 << 32); | |
3193 | } | |
3194 | ||
8776e519 HB |
3195 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
3196 | { | |
3197 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 3198 | int r = 1; |
8776e519 | 3199 | |
5fdbf976 MT |
3200 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3201 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3202 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3203 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3204 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 3205 | |
229456fc | 3206 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 3207 | |
8776e519 HB |
3208 | if (!is_long_mode(vcpu)) { |
3209 | nr &= 0xFFFFFFFF; | |
3210 | a0 &= 0xFFFFFFFF; | |
3211 | a1 &= 0xFFFFFFFF; | |
3212 | a2 &= 0xFFFFFFFF; | |
3213 | a3 &= 0xFFFFFFFF; | |
3214 | } | |
3215 | ||
3216 | switch (nr) { | |
b93463aa AK |
3217 | case KVM_HC_VAPIC_POLL_IRQ: |
3218 | ret = 0; | |
3219 | break; | |
2f333bcb MT |
3220 | case KVM_HC_MMU_OP: |
3221 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
3222 | break; | |
8776e519 HB |
3223 | default: |
3224 | ret = -KVM_ENOSYS; | |
3225 | break; | |
3226 | } | |
5fdbf976 | 3227 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 3228 | ++vcpu->stat.hypercalls; |
2f333bcb | 3229 | return r; |
8776e519 HB |
3230 | } |
3231 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
3232 | ||
3233 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
3234 | { | |
3235 | char instruction[3]; | |
3236 | int ret = 0; | |
5fdbf976 | 3237 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 3238 | |
8776e519 HB |
3239 | |
3240 | /* | |
3241 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
3242 | * to ensure that the updated hypercall appears atomically across all | |
3243 | * VCPUs. | |
3244 | */ | |
3245 | kvm_mmu_zap_all(vcpu->kvm); | |
3246 | ||
8776e519 | 3247 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
5fdbf976 | 3248 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
8776e519 HB |
3249 | != X86EMUL_CONTINUE) |
3250 | ret = -EFAULT; | |
3251 | ||
8776e519 HB |
3252 | return ret; |
3253 | } | |
3254 | ||
3255 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
3256 | { | |
3257 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
3258 | } | |
3259 | ||
3260 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3261 | { | |
3262 | struct descriptor_table dt = { limit, base }; | |
3263 | ||
3264 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3265 | } | |
3266 | ||
3267 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3268 | { | |
3269 | struct descriptor_table dt = { limit, base }; | |
3270 | ||
3271 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3272 | } | |
3273 | ||
3274 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
3275 | unsigned long *rflags) | |
3276 | { | |
2d3ad1f4 | 3277 | kvm_lmsw(vcpu, msw); |
8776e519 HB |
3278 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
3279 | } | |
3280 | ||
3281 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
3282 | { | |
54e445ca JR |
3283 | unsigned long value; |
3284 | ||
8776e519 HB |
3285 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
3286 | switch (cr) { | |
3287 | case 0: | |
54e445ca JR |
3288 | value = vcpu->arch.cr0; |
3289 | break; | |
8776e519 | 3290 | case 2: |
54e445ca JR |
3291 | value = vcpu->arch.cr2; |
3292 | break; | |
8776e519 | 3293 | case 3: |
54e445ca JR |
3294 | value = vcpu->arch.cr3; |
3295 | break; | |
8776e519 | 3296 | case 4: |
54e445ca JR |
3297 | value = vcpu->arch.cr4; |
3298 | break; | |
152ff9be | 3299 | case 8: |
54e445ca JR |
3300 | value = kvm_get_cr8(vcpu); |
3301 | break; | |
8776e519 | 3302 | default: |
b8688d51 | 3303 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3304 | return 0; |
3305 | } | |
54e445ca JR |
3306 | |
3307 | return value; | |
8776e519 HB |
3308 | } |
3309 | ||
3310 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
3311 | unsigned long *rflags) | |
3312 | { | |
3313 | switch (cr) { | |
3314 | case 0: | |
2d3ad1f4 | 3315 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
8776e519 HB |
3316 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
3317 | break; | |
3318 | case 2: | |
ad312c7c | 3319 | vcpu->arch.cr2 = val; |
8776e519 HB |
3320 | break; |
3321 | case 3: | |
2d3ad1f4 | 3322 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
3323 | break; |
3324 | case 4: | |
2d3ad1f4 | 3325 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
8776e519 | 3326 | break; |
152ff9be | 3327 | case 8: |
2d3ad1f4 | 3328 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 3329 | break; |
8776e519 | 3330 | default: |
b8688d51 | 3331 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3332 | } |
3333 | } | |
3334 | ||
07716717 DK |
3335 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
3336 | { | |
ad312c7c ZX |
3337 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
3338 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
3339 | |
3340 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
3341 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 3342 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 3343 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
3344 | if (ej->function == e->function) { |
3345 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
3346 | return j; | |
3347 | } | |
3348 | } | |
3349 | return 0; /* silence gcc, even though control never reaches here */ | |
3350 | } | |
3351 | ||
3352 | /* find an entry with matching function, matching index (if needed), and that | |
3353 | * should be read next (if it's stateful) */ | |
3354 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
3355 | u32 function, u32 index) | |
3356 | { | |
3357 | if (e->function != function) | |
3358 | return 0; | |
3359 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
3360 | return 0; | |
3361 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 3362 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
3363 | return 0; |
3364 | return 1; | |
3365 | } | |
3366 | ||
d8017474 AG |
3367 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
3368 | u32 function, u32 index) | |
8776e519 HB |
3369 | { |
3370 | int i; | |
d8017474 | 3371 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 3372 | |
ad312c7c | 3373 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
3374 | struct kvm_cpuid_entry2 *e; |
3375 | ||
ad312c7c | 3376 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
3377 | if (is_matching_cpuid_entry(e, function, index)) { |
3378 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
3379 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
3380 | best = e; |
3381 | break; | |
3382 | } | |
3383 | /* | |
3384 | * Both basic or both extended? | |
3385 | */ | |
3386 | if (((e->function ^ function) & 0x80000000) == 0) | |
3387 | if (!best || e->function > best->function) | |
3388 | best = e; | |
3389 | } | |
d8017474 AG |
3390 | return best; |
3391 | } | |
3392 | ||
82725b20 DE |
3393 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
3394 | { | |
3395 | struct kvm_cpuid_entry2 *best; | |
3396 | ||
3397 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); | |
3398 | if (best) | |
3399 | return best->eax & 0xff; | |
3400 | return 36; | |
3401 | } | |
3402 | ||
d8017474 AG |
3403 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
3404 | { | |
3405 | u32 function, index; | |
3406 | struct kvm_cpuid_entry2 *best; | |
3407 | ||
3408 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3409 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3410 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
3411 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
3412 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
3413 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
3414 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 3415 | if (best) { |
5fdbf976 MT |
3416 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
3417 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
3418 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
3419 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 3420 | } |
8776e519 | 3421 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
3422 | trace_kvm_cpuid(function, |
3423 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
3424 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
3425 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
3426 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
3427 | } |
3428 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 3429 | |
b6c7a5dc HB |
3430 | /* |
3431 | * Check if userspace requested an interrupt window, and that the | |
3432 | * interrupt window is open. | |
3433 | * | |
3434 | * No need to exit to userspace if we already have an interrupt queued. | |
3435 | */ | |
3436 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
3437 | struct kvm_run *kvm_run) | |
3438 | { | |
8061823a | 3439 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
b6c7a5dc | 3440 | kvm_run->request_interrupt_window && |
5df56646 | 3441 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
3442 | } |
3443 | ||
3444 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
3445 | struct kvm_run *kvm_run) | |
3446 | { | |
3447 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2d3ad1f4 | 3448 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 3449 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 3450 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 3451 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 3452 | else |
b6c7a5dc | 3453 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
3454 | kvm_arch_interrupt_allowed(vcpu) && |
3455 | !kvm_cpu_has_interrupt(vcpu) && | |
3456 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
3457 | } |
3458 | ||
b93463aa AK |
3459 | static void vapic_enter(struct kvm_vcpu *vcpu) |
3460 | { | |
3461 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3462 | struct page *page; | |
3463 | ||
3464 | if (!apic || !apic->vapic_addr) | |
3465 | return; | |
3466 | ||
3467 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
3468 | |
3469 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
3470 | } |
3471 | ||
3472 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
3473 | { | |
3474 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3475 | ||
3476 | if (!apic || !apic->vapic_addr) | |
3477 | return; | |
3478 | ||
f8b78fa3 | 3479 | down_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3480 | kvm_release_page_dirty(apic->vapic_page); |
3481 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f8b78fa3 | 3482 | up_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3483 | } |
3484 | ||
95ba8273 GN |
3485 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
3486 | { | |
3487 | int max_irr, tpr; | |
3488 | ||
3489 | if (!kvm_x86_ops->update_cr8_intercept) | |
3490 | return; | |
3491 | ||
8db3baa2 GN |
3492 | if (!vcpu->arch.apic->vapic_addr) |
3493 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
3494 | else | |
3495 | max_irr = -1; | |
95ba8273 GN |
3496 | |
3497 | if (max_irr != -1) | |
3498 | max_irr >>= 4; | |
3499 | ||
3500 | tpr = kvm_lapic_get_cr8(vcpu); | |
3501 | ||
3502 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
3503 | } | |
3504 | ||
b59bb7bd | 3505 | static void inject_pending_event(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
95ba8273 GN |
3506 | { |
3507 | /* try to reinject previous events if any */ | |
b59bb7bd GN |
3508 | if (vcpu->arch.exception.pending) { |
3509 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, | |
3510 | vcpu->arch.exception.has_error_code, | |
3511 | vcpu->arch.exception.error_code); | |
3512 | return; | |
3513 | } | |
3514 | ||
95ba8273 GN |
3515 | if (vcpu->arch.nmi_injected) { |
3516 | kvm_x86_ops->set_nmi(vcpu); | |
3517 | return; | |
3518 | } | |
3519 | ||
3520 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 3521 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
3522 | return; |
3523 | } | |
3524 | ||
3525 | /* try to inject new event if pending */ | |
3526 | if (vcpu->arch.nmi_pending) { | |
3527 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
3528 | vcpu->arch.nmi_pending = false; | |
3529 | vcpu->arch.nmi_injected = true; | |
3530 | kvm_x86_ops->set_nmi(vcpu); | |
3531 | } | |
3532 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
3533 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
3534 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
3535 | false); | |
3536 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
3537 | } |
3538 | } | |
3539 | } | |
3540 | ||
d7690175 | 3541 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
b6c7a5dc HB |
3542 | { |
3543 | int r; | |
6a8b1d13 GN |
3544 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
3545 | kvm_run->request_interrupt_window; | |
b6c7a5dc | 3546 | |
2e53d63a MT |
3547 | if (vcpu->requests) |
3548 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
3549 | kvm_mmu_unload(vcpu); | |
3550 | ||
b6c7a5dc HB |
3551 | r = kvm_mmu_reload(vcpu); |
3552 | if (unlikely(r)) | |
3553 | goto out; | |
3554 | ||
2f52d58c AK |
3555 | if (vcpu->requests) { |
3556 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 3557 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
3558 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
3559 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
3560 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
3561 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
3562 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
3563 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
3564 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
3565 | &vcpu->requests)) { | |
3566 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; | |
3567 | r = 0; | |
3568 | goto out; | |
3569 | } | |
71c4dfaf JR |
3570 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
3571 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
3572 | r = 0; | |
3573 | goto out; | |
3574 | } | |
2f52d58c | 3575 | } |
b93463aa | 3576 | |
b6c7a5dc HB |
3577 | preempt_disable(); |
3578 | ||
3579 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
3580 | kvm_load_guest_fpu(vcpu); | |
3581 | ||
3582 | local_irq_disable(); | |
3583 | ||
32f88400 MT |
3584 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
3585 | smp_mb__after_clear_bit(); | |
3586 | ||
d7690175 | 3587 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
c7f0f24b | 3588 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
6c142801 AK |
3589 | local_irq_enable(); |
3590 | preempt_enable(); | |
3591 | r = 1; | |
3592 | goto out; | |
3593 | } | |
3594 | ||
b59bb7bd | 3595 | inject_pending_event(vcpu, kvm_run); |
b6c7a5dc | 3596 | |
6a8b1d13 GN |
3597 | /* enable NMI/IRQ window open exits if needed */ |
3598 | if (vcpu->arch.nmi_pending) | |
3599 | kvm_x86_ops->enable_nmi_window(vcpu); | |
3600 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
3601 | kvm_x86_ops->enable_irq_window(vcpu); | |
3602 | ||
95ba8273 | 3603 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
3604 | update_cr8_intercept(vcpu); |
3605 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 3606 | } |
b93463aa | 3607 | |
3200f405 MT |
3608 | up_read(&vcpu->kvm->slots_lock); |
3609 | ||
b6c7a5dc HB |
3610 | kvm_guest_enter(); |
3611 | ||
42dbaa5a JK |
3612 | get_debugreg(vcpu->arch.host_dr6, 6); |
3613 | get_debugreg(vcpu->arch.host_dr7, 7); | |
3614 | if (unlikely(vcpu->arch.switch_db_regs)) { | |
3615 | get_debugreg(vcpu->arch.host_db[0], 0); | |
3616 | get_debugreg(vcpu->arch.host_db[1], 1); | |
3617 | get_debugreg(vcpu->arch.host_db[2], 2); | |
3618 | get_debugreg(vcpu->arch.host_db[3], 3); | |
3619 | ||
3620 | set_debugreg(0, 7); | |
3621 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
3622 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
3623 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
3624 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
3625 | } | |
b6c7a5dc | 3626 | |
229456fc | 3627 | trace_kvm_entry(vcpu->vcpu_id); |
b6c7a5dc HB |
3628 | kvm_x86_ops->run(vcpu, kvm_run); |
3629 | ||
42dbaa5a JK |
3630 | if (unlikely(vcpu->arch.switch_db_regs)) { |
3631 | set_debugreg(0, 7); | |
3632 | set_debugreg(vcpu->arch.host_db[0], 0); | |
3633 | set_debugreg(vcpu->arch.host_db[1], 1); | |
3634 | set_debugreg(vcpu->arch.host_db[2], 2); | |
3635 | set_debugreg(vcpu->arch.host_db[3], 3); | |
3636 | } | |
3637 | set_debugreg(vcpu->arch.host_dr6, 6); | |
3638 | set_debugreg(vcpu->arch.host_dr7, 7); | |
3639 | ||
32f88400 | 3640 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
b6c7a5dc HB |
3641 | local_irq_enable(); |
3642 | ||
3643 | ++vcpu->stat.exits; | |
3644 | ||
3645 | /* | |
3646 | * We must have an instruction between local_irq_enable() and | |
3647 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
3648 | * the interrupt shadow. The stat.exits increment will do nicely. | |
3649 | * But we need to prevent reordering, hence this barrier(): | |
3650 | */ | |
3651 | barrier(); | |
3652 | ||
3653 | kvm_guest_exit(); | |
3654 | ||
3655 | preempt_enable(); | |
3656 | ||
3200f405 MT |
3657 | down_read(&vcpu->kvm->slots_lock); |
3658 | ||
b6c7a5dc HB |
3659 | /* |
3660 | * Profile KVM exit RIPs: | |
3661 | */ | |
3662 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
3663 | unsigned long rip = kvm_rip_read(vcpu); |
3664 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
3665 | } |
3666 | ||
298101da | 3667 | |
b93463aa AK |
3668 | kvm_lapic_sync_from_vapic(vcpu); |
3669 | ||
b6c7a5dc | 3670 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
d7690175 MT |
3671 | out: |
3672 | return r; | |
3673 | } | |
b6c7a5dc | 3674 | |
09cec754 | 3675 | |
d7690175 MT |
3676 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
3677 | { | |
3678 | int r; | |
3679 | ||
3680 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
3681 | pr_debug("vcpu %d received sipi with vector # %x\n", |
3682 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 3683 | kvm_lapic_reset(vcpu); |
5f179287 | 3684 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
3685 | if (r) |
3686 | return r; | |
3687 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
3688 | } |
3689 | ||
d7690175 MT |
3690 | down_read(&vcpu->kvm->slots_lock); |
3691 | vapic_enter(vcpu); | |
3692 | ||
3693 | r = 1; | |
3694 | while (r > 0) { | |
af2152f5 | 3695 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
d7690175 MT |
3696 | r = vcpu_enter_guest(vcpu, kvm_run); |
3697 | else { | |
3698 | up_read(&vcpu->kvm->slots_lock); | |
3699 | kvm_vcpu_block(vcpu); | |
3700 | down_read(&vcpu->kvm->slots_lock); | |
3701 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) | |
09cec754 GN |
3702 | { |
3703 | switch(vcpu->arch.mp_state) { | |
3704 | case KVM_MP_STATE_HALTED: | |
d7690175 | 3705 | vcpu->arch.mp_state = |
09cec754 GN |
3706 | KVM_MP_STATE_RUNNABLE; |
3707 | case KVM_MP_STATE_RUNNABLE: | |
3708 | break; | |
3709 | case KVM_MP_STATE_SIPI_RECEIVED: | |
3710 | default: | |
3711 | r = -EINTR; | |
3712 | break; | |
3713 | } | |
3714 | } | |
d7690175 MT |
3715 | } |
3716 | ||
09cec754 GN |
3717 | if (r <= 0) |
3718 | break; | |
3719 | ||
3720 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
3721 | if (kvm_cpu_has_pending_timer(vcpu)) | |
3722 | kvm_inject_pending_timer_irqs(vcpu); | |
3723 | ||
3724 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
3725 | r = -EINTR; | |
3726 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3727 | ++vcpu->stat.request_irq_exits; | |
3728 | } | |
3729 | if (signal_pending(current)) { | |
3730 | r = -EINTR; | |
3731 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3732 | ++vcpu->stat.signal_exits; | |
3733 | } | |
3734 | if (need_resched()) { | |
3735 | up_read(&vcpu->kvm->slots_lock); | |
3736 | kvm_resched(vcpu); | |
3737 | down_read(&vcpu->kvm->slots_lock); | |
d7690175 | 3738 | } |
b6c7a5dc HB |
3739 | } |
3740 | ||
d7690175 | 3741 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3742 | post_kvm_run_save(vcpu, kvm_run); |
3743 | ||
b93463aa AK |
3744 | vapic_exit(vcpu); |
3745 | ||
b6c7a5dc HB |
3746 | return r; |
3747 | } | |
3748 | ||
3749 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
3750 | { | |
3751 | int r; | |
3752 | sigset_t sigsaved; | |
3753 | ||
3754 | vcpu_load(vcpu); | |
3755 | ||
ac9f6dc0 AK |
3756 | if (vcpu->sigset_active) |
3757 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
3758 | ||
a4535290 | 3759 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 3760 | kvm_vcpu_block(vcpu); |
d7690175 | 3761 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
3762 | r = -EAGAIN; |
3763 | goto out; | |
b6c7a5dc HB |
3764 | } |
3765 | ||
b6c7a5dc HB |
3766 | /* re-sync apic's tpr */ |
3767 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 3768 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 3769 | |
ad312c7c | 3770 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
3771 | r = complete_pio(vcpu); |
3772 | if (r) | |
3773 | goto out; | |
3774 | } | |
3775 | #if CONFIG_HAS_IOMEM | |
3776 | if (vcpu->mmio_needed) { | |
3777 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
3778 | vcpu->mmio_read_completed = 1; | |
3779 | vcpu->mmio_needed = 0; | |
3200f405 MT |
3780 | |
3781 | down_read(&vcpu->kvm->slots_lock); | |
b6c7a5dc | 3782 | r = emulate_instruction(vcpu, kvm_run, |
571008da SY |
3783 | vcpu->arch.mmio_fault_cr2, 0, |
3784 | EMULTYPE_NO_DECODE); | |
3200f405 | 3785 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3786 | if (r == EMULATE_DO_MMIO) { |
3787 | /* | |
3788 | * Read-modify-write. Back to userspace. | |
3789 | */ | |
3790 | r = 0; | |
3791 | goto out; | |
3792 | } | |
3793 | } | |
3794 | #endif | |
5fdbf976 MT |
3795 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
3796 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
3797 | kvm_run->hypercall.ret); | |
b6c7a5dc HB |
3798 | |
3799 | r = __vcpu_run(vcpu, kvm_run); | |
3800 | ||
3801 | out: | |
3802 | if (vcpu->sigset_active) | |
3803 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
3804 | ||
3805 | vcpu_put(vcpu); | |
3806 | return r; | |
3807 | } | |
3808 | ||
3809 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3810 | { | |
3811 | vcpu_load(vcpu); | |
3812 | ||
5fdbf976 MT |
3813 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3814 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3815 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3816 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3817 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3818 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3819 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3820 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 3821 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3822 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
3823 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
3824 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
3825 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
3826 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
3827 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
3828 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
3829 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
3830 | #endif |
3831 | ||
5fdbf976 | 3832 | regs->rip = kvm_rip_read(vcpu); |
b6c7a5dc HB |
3833 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
3834 | ||
3835 | /* | |
3836 | * Don't leak debug flags in case they were set for guest debugging | |
3837 | */ | |
d0bfb940 | 3838 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
b6c7a5dc HB |
3839 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
3840 | ||
3841 | vcpu_put(vcpu); | |
3842 | ||
3843 | return 0; | |
3844 | } | |
3845 | ||
3846 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3847 | { | |
3848 | vcpu_load(vcpu); | |
3849 | ||
5fdbf976 MT |
3850 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
3851 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
3852 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
3853 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
3854 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
3855 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
3856 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
3857 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 3858 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3859 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
3860 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
3861 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
3862 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
3863 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
3864 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
3865 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
3866 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
3867 | ||
b6c7a5dc HB |
3868 | #endif |
3869 | ||
5fdbf976 | 3870 | kvm_rip_write(vcpu, regs->rip); |
b6c7a5dc HB |
3871 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
3872 | ||
b6c7a5dc | 3873 | |
b4f14abd JK |
3874 | vcpu->arch.exception.pending = false; |
3875 | ||
b6c7a5dc HB |
3876 | vcpu_put(vcpu); |
3877 | ||
3878 | return 0; | |
3879 | } | |
3880 | ||
3e6e0aab GT |
3881 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
3882 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 3883 | { |
14af3f3c | 3884 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
3885 | } |
3886 | ||
3887 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
3888 | { | |
3889 | struct kvm_segment cs; | |
3890 | ||
3e6e0aab | 3891 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
3892 | *db = cs.db; |
3893 | *l = cs.l; | |
3894 | } | |
3895 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
3896 | ||
3897 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
3898 | struct kvm_sregs *sregs) | |
3899 | { | |
3900 | struct descriptor_table dt; | |
b6c7a5dc HB |
3901 | |
3902 | vcpu_load(vcpu); | |
3903 | ||
3e6e0aab GT |
3904 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3905 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3906 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3907 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3908 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3909 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3910 | |
3e6e0aab GT |
3911 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3912 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
3913 | |
3914 | kvm_x86_ops->get_idt(vcpu, &dt); | |
3915 | sregs->idt.limit = dt.limit; | |
3916 | sregs->idt.base = dt.base; | |
3917 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
3918 | sregs->gdt.limit = dt.limit; | |
3919 | sregs->gdt.base = dt.base; | |
3920 | ||
3921 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
ad312c7c ZX |
3922 | sregs->cr0 = vcpu->arch.cr0; |
3923 | sregs->cr2 = vcpu->arch.cr2; | |
3924 | sregs->cr3 = vcpu->arch.cr3; | |
3925 | sregs->cr4 = vcpu->arch.cr4; | |
2d3ad1f4 | 3926 | sregs->cr8 = kvm_get_cr8(vcpu); |
ad312c7c | 3927 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
3928 | sregs->apic_base = kvm_get_apic_base(vcpu); |
3929 | ||
923c61bb | 3930 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 3931 | |
36752c9b | 3932 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
3933 | set_bit(vcpu->arch.interrupt.nr, |
3934 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 3935 | |
b6c7a5dc HB |
3936 | vcpu_put(vcpu); |
3937 | ||
3938 | return 0; | |
3939 | } | |
3940 | ||
62d9f0db MT |
3941 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
3942 | struct kvm_mp_state *mp_state) | |
3943 | { | |
3944 | vcpu_load(vcpu); | |
3945 | mp_state->mp_state = vcpu->arch.mp_state; | |
3946 | vcpu_put(vcpu); | |
3947 | return 0; | |
3948 | } | |
3949 | ||
3950 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
3951 | struct kvm_mp_state *mp_state) | |
3952 | { | |
3953 | vcpu_load(vcpu); | |
3954 | vcpu->arch.mp_state = mp_state->mp_state; | |
3955 | vcpu_put(vcpu); | |
3956 | return 0; | |
3957 | } | |
3958 | ||
3e6e0aab | 3959 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
3960 | struct kvm_segment *var, int seg) |
3961 | { | |
14af3f3c | 3962 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
3963 | } |
3964 | ||
37817f29 IE |
3965 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
3966 | struct kvm_segment *kvm_desct) | |
3967 | { | |
46a359e7 AM |
3968 | kvm_desct->base = get_desc_base(seg_desc); |
3969 | kvm_desct->limit = get_desc_limit(seg_desc); | |
c93cd3a5 MT |
3970 | if (seg_desc->g) { |
3971 | kvm_desct->limit <<= 12; | |
3972 | kvm_desct->limit |= 0xfff; | |
3973 | } | |
37817f29 IE |
3974 | kvm_desct->selector = selector; |
3975 | kvm_desct->type = seg_desc->type; | |
3976 | kvm_desct->present = seg_desc->p; | |
3977 | kvm_desct->dpl = seg_desc->dpl; | |
3978 | kvm_desct->db = seg_desc->d; | |
3979 | kvm_desct->s = seg_desc->s; | |
3980 | kvm_desct->l = seg_desc->l; | |
3981 | kvm_desct->g = seg_desc->g; | |
3982 | kvm_desct->avl = seg_desc->avl; | |
3983 | if (!selector) | |
3984 | kvm_desct->unusable = 1; | |
3985 | else | |
3986 | kvm_desct->unusable = 0; | |
3987 | kvm_desct->padding = 0; | |
3988 | } | |
3989 | ||
b8222ad2 AS |
3990 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
3991 | u16 selector, | |
3992 | struct descriptor_table *dtable) | |
37817f29 IE |
3993 | { |
3994 | if (selector & 1 << 2) { | |
3995 | struct kvm_segment kvm_seg; | |
3996 | ||
3e6e0aab | 3997 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
3998 | |
3999 | if (kvm_seg.unusable) | |
4000 | dtable->limit = 0; | |
4001 | else | |
4002 | dtable->limit = kvm_seg.limit; | |
4003 | dtable->base = kvm_seg.base; | |
4004 | } | |
4005 | else | |
4006 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
4007 | } | |
4008 | ||
4009 | /* allowed just for 8 bytes segments */ | |
4010 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4011 | struct desc_struct *seg_desc) | |
4012 | { | |
98899aa0 | 4013 | gpa_t gpa; |
37817f29 IE |
4014 | struct descriptor_table dtable; |
4015 | u16 index = selector >> 3; | |
4016 | ||
b8222ad2 | 4017 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4018 | |
4019 | if (dtable.limit < index * 8 + 7) { | |
4020 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
4021 | return 1; | |
4022 | } | |
98899aa0 MT |
4023 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
4024 | gpa += index * 8; | |
4025 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
4026 | } |
4027 | ||
4028 | /* allowed just for 8 bytes segments */ | |
4029 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4030 | struct desc_struct *seg_desc) | |
4031 | { | |
98899aa0 | 4032 | gpa_t gpa; |
37817f29 IE |
4033 | struct descriptor_table dtable; |
4034 | u16 index = selector >> 3; | |
4035 | ||
b8222ad2 | 4036 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4037 | |
4038 | if (dtable.limit < index * 8 + 7) | |
4039 | return 1; | |
98899aa0 MT |
4040 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
4041 | gpa += index * 8; | |
4042 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
4043 | } |
4044 | ||
4045 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, | |
4046 | struct desc_struct *seg_desc) | |
4047 | { | |
46a359e7 | 4048 | u32 base_addr = get_desc_base(seg_desc); |
37817f29 | 4049 | |
98899aa0 | 4050 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
37817f29 IE |
4051 | } |
4052 | ||
37817f29 IE |
4053 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
4054 | { | |
4055 | struct kvm_segment kvm_seg; | |
4056 | ||
3e6e0aab | 4057 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4058 | return kvm_seg.selector; |
4059 | } | |
4060 | ||
4061 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, | |
4062 | u16 selector, | |
4063 | struct kvm_segment *kvm_seg) | |
4064 | { | |
4065 | struct desc_struct seg_desc; | |
4066 | ||
4067 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) | |
4068 | return 1; | |
4069 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); | |
4070 | return 0; | |
4071 | } | |
4072 | ||
2259e3a7 | 4073 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
4074 | { |
4075 | struct kvm_segment segvar = { | |
4076 | .base = selector << 4, | |
4077 | .limit = 0xffff, | |
4078 | .selector = selector, | |
4079 | .type = 3, | |
4080 | .present = 1, | |
4081 | .dpl = 3, | |
4082 | .db = 0, | |
4083 | .s = 1, | |
4084 | .l = 0, | |
4085 | .g = 0, | |
4086 | .avl = 0, | |
4087 | .unusable = 0, | |
4088 | }; | |
4089 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
4090 | return 0; | |
4091 | } | |
4092 | ||
3e6e0aab GT |
4093 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
4094 | int type_bits, int seg) | |
37817f29 IE |
4095 | { |
4096 | struct kvm_segment kvm_seg; | |
4097 | ||
f4bbd9aa AK |
4098 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
4099 | return kvm_load_realmode_segment(vcpu, selector, seg); | |
37817f29 IE |
4100 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
4101 | return 1; | |
4102 | kvm_seg.type |= type_bits; | |
4103 | ||
4104 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && | |
4105 | seg != VCPU_SREG_LDTR) | |
4106 | if (!kvm_seg.s) | |
4107 | kvm_seg.unusable = 1; | |
4108 | ||
3e6e0aab | 4109 | kvm_set_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4110 | return 0; |
4111 | } | |
4112 | ||
4113 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
4114 | struct tss_segment_32 *tss) | |
4115 | { | |
4116 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 4117 | tss->eip = kvm_rip_read(vcpu); |
37817f29 | 4118 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
4119 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4120 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4121 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4122 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4123 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4124 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4125 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4126 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4127 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
4128 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4129 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4130 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4131 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
4132 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
4133 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
37817f29 IE |
4134 | } |
4135 | ||
4136 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, | |
4137 | struct tss_segment_32 *tss) | |
4138 | { | |
4139 | kvm_set_cr3(vcpu, tss->cr3); | |
4140 | ||
5fdbf976 | 4141 | kvm_rip_write(vcpu, tss->eip); |
37817f29 IE |
4142 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
4143 | ||
5fdbf976 MT |
4144 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
4145 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
4146 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
4147 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
4148 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
4149 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
4150 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
4151 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 4152 | |
3e6e0aab | 4153 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
4154 | return 1; |
4155 | ||
3e6e0aab | 4156 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
4157 | return 1; |
4158 | ||
3e6e0aab | 4159 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
4160 | return 1; |
4161 | ||
3e6e0aab | 4162 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
4163 | return 1; |
4164 | ||
3e6e0aab | 4165 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
4166 | return 1; |
4167 | ||
3e6e0aab | 4168 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
37817f29 IE |
4169 | return 1; |
4170 | ||
3e6e0aab | 4171 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
37817f29 IE |
4172 | return 1; |
4173 | return 0; | |
4174 | } | |
4175 | ||
4176 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
4177 | struct tss_segment_16 *tss) | |
4178 | { | |
5fdbf976 | 4179 | tss->ip = kvm_rip_read(vcpu); |
37817f29 | 4180 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
4181 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4182 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4183 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4184 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4185 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4186 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4187 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4188 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4189 | |
4190 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
4191 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4192 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4193 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4194 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
4195 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
4196 | } | |
4197 | ||
4198 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
4199 | struct tss_segment_16 *tss) | |
4200 | { | |
5fdbf976 | 4201 | kvm_rip_write(vcpu, tss->ip); |
37817f29 | 4202 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
4203 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
4204 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
4205 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
4206 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
4207 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
4208 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
4209 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
4210 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 4211 | |
3e6e0aab | 4212 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
4213 | return 1; |
4214 | ||
3e6e0aab | 4215 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
4216 | return 1; |
4217 | ||
3e6e0aab | 4218 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
4219 | return 1; |
4220 | ||
3e6e0aab | 4221 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
4222 | return 1; |
4223 | ||
3e6e0aab | 4224 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
4225 | return 1; |
4226 | return 0; | |
4227 | } | |
4228 | ||
8b2cf73c | 4229 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 GN |
4230 | u16 old_tss_sel, u32 old_tss_base, |
4231 | struct desc_struct *nseg_desc) | |
37817f29 IE |
4232 | { |
4233 | struct tss_segment_16 tss_segment_16; | |
4234 | int ret = 0; | |
4235 | ||
34198bf8 MT |
4236 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
4237 | sizeof tss_segment_16)) | |
37817f29 IE |
4238 | goto out; |
4239 | ||
4240 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 4241 | |
34198bf8 MT |
4242 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
4243 | sizeof tss_segment_16)) | |
37817f29 | 4244 | goto out; |
34198bf8 MT |
4245 | |
4246 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
4247 | &tss_segment_16, sizeof tss_segment_16)) | |
4248 | goto out; | |
4249 | ||
b237ac37 GN |
4250 | if (old_tss_sel != 0xffff) { |
4251 | tss_segment_16.prev_task_link = old_tss_sel; | |
4252 | ||
4253 | if (kvm_write_guest(vcpu->kvm, | |
4254 | get_tss_base_addr(vcpu, nseg_desc), | |
4255 | &tss_segment_16.prev_task_link, | |
4256 | sizeof tss_segment_16.prev_task_link)) | |
4257 | goto out; | |
4258 | } | |
4259 | ||
37817f29 IE |
4260 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
4261 | goto out; | |
4262 | ||
4263 | ret = 1; | |
4264 | out: | |
4265 | return ret; | |
4266 | } | |
4267 | ||
8b2cf73c | 4268 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 | 4269 | u16 old_tss_sel, u32 old_tss_base, |
37817f29 IE |
4270 | struct desc_struct *nseg_desc) |
4271 | { | |
4272 | struct tss_segment_32 tss_segment_32; | |
4273 | int ret = 0; | |
4274 | ||
34198bf8 MT |
4275 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
4276 | sizeof tss_segment_32)) | |
37817f29 IE |
4277 | goto out; |
4278 | ||
4279 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 4280 | |
34198bf8 MT |
4281 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
4282 | sizeof tss_segment_32)) | |
4283 | goto out; | |
4284 | ||
4285 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
4286 | &tss_segment_32, sizeof tss_segment_32)) | |
37817f29 | 4287 | goto out; |
34198bf8 | 4288 | |
b237ac37 GN |
4289 | if (old_tss_sel != 0xffff) { |
4290 | tss_segment_32.prev_task_link = old_tss_sel; | |
4291 | ||
4292 | if (kvm_write_guest(vcpu->kvm, | |
4293 | get_tss_base_addr(vcpu, nseg_desc), | |
4294 | &tss_segment_32.prev_task_link, | |
4295 | sizeof tss_segment_32.prev_task_link)) | |
4296 | goto out; | |
4297 | } | |
4298 | ||
37817f29 IE |
4299 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
4300 | goto out; | |
4301 | ||
4302 | ret = 1; | |
4303 | out: | |
4304 | return ret; | |
4305 | } | |
4306 | ||
4307 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
4308 | { | |
4309 | struct kvm_segment tr_seg; | |
4310 | struct desc_struct cseg_desc; | |
4311 | struct desc_struct nseg_desc; | |
4312 | int ret = 0; | |
34198bf8 MT |
4313 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
4314 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 4315 | |
34198bf8 | 4316 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
37817f29 | 4317 | |
34198bf8 MT |
4318 | /* FIXME: Handle errors. Failure to read either TSS or their |
4319 | * descriptors should generate a pagefault. | |
4320 | */ | |
37817f29 IE |
4321 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
4322 | goto out; | |
4323 | ||
34198bf8 | 4324 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
4325 | goto out; |
4326 | ||
37817f29 IE |
4327 | if (reason != TASK_SWITCH_IRET) { |
4328 | int cpl; | |
4329 | ||
4330 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
4331 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
4332 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
4333 | return 1; | |
4334 | } | |
4335 | } | |
4336 | ||
46a359e7 | 4337 | if (!nseg_desc.p || get_desc_limit(&nseg_desc) < 0x67) { |
37817f29 IE |
4338 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); |
4339 | return 1; | |
4340 | } | |
4341 | ||
4342 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 4343 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 4344 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
4345 | } |
4346 | ||
4347 | if (reason == TASK_SWITCH_IRET) { | |
4348 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
4349 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
4350 | } | |
4351 | ||
64a7ec06 GN |
4352 | /* set back link to prev task only if NT bit is set in eflags |
4353 | note that old_tss_sel is not used afetr this point */ | |
4354 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) | |
4355 | old_tss_sel = 0xffff; | |
37817f29 | 4356 | |
b237ac37 GN |
4357 | /* set back link to prev task only if NT bit is set in eflags |
4358 | note that old_tss_sel is not used afetr this point */ | |
4359 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) | |
4360 | old_tss_sel = 0xffff; | |
4361 | ||
37817f29 | 4362 | if (nseg_desc.type & 8) |
b237ac37 GN |
4363 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel, |
4364 | old_tss_base, &nseg_desc); | |
37817f29 | 4365 | else |
b237ac37 GN |
4366 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel, |
4367 | old_tss_base, &nseg_desc); | |
37817f29 IE |
4368 | |
4369 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
4370 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
4371 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
4372 | } | |
4373 | ||
4374 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 4375 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
4376 | save_guest_segment_descriptor(vcpu, tss_selector, |
4377 | &nseg_desc); | |
4378 | } | |
4379 | ||
4380 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); | |
4381 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); | |
4382 | tr_seg.type = 11; | |
3e6e0aab | 4383 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 4384 | out: |
37817f29 IE |
4385 | return ret; |
4386 | } | |
4387 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
4388 | ||
b6c7a5dc HB |
4389 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
4390 | struct kvm_sregs *sregs) | |
4391 | { | |
4392 | int mmu_reset_needed = 0; | |
923c61bb | 4393 | int pending_vec, max_bits; |
b6c7a5dc HB |
4394 | struct descriptor_table dt; |
4395 | ||
4396 | vcpu_load(vcpu); | |
4397 | ||
4398 | dt.limit = sregs->idt.limit; | |
4399 | dt.base = sregs->idt.base; | |
4400 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4401 | dt.limit = sregs->gdt.limit; | |
4402 | dt.base = sregs->gdt.base; | |
4403 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4404 | ||
ad312c7c ZX |
4405 | vcpu->arch.cr2 = sregs->cr2; |
4406 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 4407 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 4408 | |
2d3ad1f4 | 4409 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 4410 | |
ad312c7c | 4411 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc | 4412 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
4413 | kvm_set_apic_base(vcpu, sregs->apic_base); |
4414 | ||
4415 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
4416 | ||
ad312c7c | 4417 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 4418 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 4419 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 4420 | |
ad312c7c | 4421 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
b6c7a5dc HB |
4422 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
4423 | if (!is_long_mode(vcpu) && is_pae(vcpu)) | |
ad312c7c | 4424 | load_pdptrs(vcpu, vcpu->arch.cr3); |
b6c7a5dc HB |
4425 | |
4426 | if (mmu_reset_needed) | |
4427 | kvm_mmu_reset_context(vcpu); | |
4428 | ||
923c61bb GN |
4429 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
4430 | pending_vec = find_first_bit( | |
4431 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
4432 | if (pending_vec < max_bits) { | |
66fd3f7f | 4433 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
4434 | pr_debug("Set back pending irq %d\n", pending_vec); |
4435 | if (irqchip_in_kernel(vcpu->kvm)) | |
4436 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
4437 | } |
4438 | ||
3e6e0aab GT |
4439 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4440 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4441 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4442 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4443 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4444 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4445 | |
3e6e0aab GT |
4446 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4447 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 4448 | |
5f0269f5 ME |
4449 | update_cr8_intercept(vcpu); |
4450 | ||
9c3e4aab | 4451 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 4452 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab MT |
4453 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
4454 | !(vcpu->arch.cr0 & X86_CR0_PE)) | |
4455 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
4456 | ||
b6c7a5dc HB |
4457 | vcpu_put(vcpu); |
4458 | ||
4459 | return 0; | |
4460 | } | |
4461 | ||
d0bfb940 JK |
4462 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
4463 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 4464 | { |
ae675ef0 | 4465 | int i, r; |
b6c7a5dc HB |
4466 | |
4467 | vcpu_load(vcpu); | |
4468 | ||
ae675ef0 JK |
4469 | if ((dbg->control & (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) == |
4470 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) { | |
4471 | for (i = 0; i < KVM_NR_DB_REGS; ++i) | |
4472 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
4473 | vcpu->arch.switch_db_regs = | |
4474 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
4475 | } else { | |
4476 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
4477 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
4478 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
4479 | } | |
4480 | ||
b6c7a5dc HB |
4481 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); |
4482 | ||
d0bfb940 JK |
4483 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
4484 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4485 | else if (dbg->control & KVM_GUESTDBG_INJECT_BP) | |
4486 | kvm_queue_exception(vcpu, BP_VECTOR); | |
4487 | ||
b6c7a5dc HB |
4488 | vcpu_put(vcpu); |
4489 | ||
4490 | return r; | |
4491 | } | |
4492 | ||
d0752060 HB |
4493 | /* |
4494 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
4495 | * we have asm/x86/processor.h | |
4496 | */ | |
4497 | struct fxsave { | |
4498 | u16 cwd; | |
4499 | u16 swd; | |
4500 | u16 twd; | |
4501 | u16 fop; | |
4502 | u64 rip; | |
4503 | u64 rdp; | |
4504 | u32 mxcsr; | |
4505 | u32 mxcsr_mask; | |
4506 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
4507 | #ifdef CONFIG_X86_64 | |
4508 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
4509 | #else | |
4510 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
4511 | #endif | |
4512 | }; | |
4513 | ||
8b006791 ZX |
4514 | /* |
4515 | * Translate a guest virtual address to a guest physical address. | |
4516 | */ | |
4517 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
4518 | struct kvm_translation *tr) | |
4519 | { | |
4520 | unsigned long vaddr = tr->linear_address; | |
4521 | gpa_t gpa; | |
4522 | ||
4523 | vcpu_load(vcpu); | |
72dc67a6 | 4524 | down_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4525 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
72dc67a6 | 4526 | up_read(&vcpu->kvm->slots_lock); |
8b006791 ZX |
4527 | tr->physical_address = gpa; |
4528 | tr->valid = gpa != UNMAPPED_GVA; | |
4529 | tr->writeable = 1; | |
4530 | tr->usermode = 0; | |
8b006791 ZX |
4531 | vcpu_put(vcpu); |
4532 | ||
4533 | return 0; | |
4534 | } | |
4535 | ||
d0752060 HB |
4536 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
4537 | { | |
ad312c7c | 4538 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4539 | |
4540 | vcpu_load(vcpu); | |
4541 | ||
4542 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
4543 | fpu->fcw = fxsave->cwd; | |
4544 | fpu->fsw = fxsave->swd; | |
4545 | fpu->ftwx = fxsave->twd; | |
4546 | fpu->last_opcode = fxsave->fop; | |
4547 | fpu->last_ip = fxsave->rip; | |
4548 | fpu->last_dp = fxsave->rdp; | |
4549 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
4550 | ||
4551 | vcpu_put(vcpu); | |
4552 | ||
4553 | return 0; | |
4554 | } | |
4555 | ||
4556 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
4557 | { | |
ad312c7c | 4558 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4559 | |
4560 | vcpu_load(vcpu); | |
4561 | ||
4562 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
4563 | fxsave->cwd = fpu->fcw; | |
4564 | fxsave->swd = fpu->fsw; | |
4565 | fxsave->twd = fpu->ftwx; | |
4566 | fxsave->fop = fpu->last_opcode; | |
4567 | fxsave->rip = fpu->last_ip; | |
4568 | fxsave->rdp = fpu->last_dp; | |
4569 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
4570 | ||
4571 | vcpu_put(vcpu); | |
4572 | ||
4573 | return 0; | |
4574 | } | |
4575 | ||
4576 | void fx_init(struct kvm_vcpu *vcpu) | |
4577 | { | |
4578 | unsigned after_mxcsr_mask; | |
4579 | ||
bc1a34f1 AA |
4580 | /* |
4581 | * Touch the fpu the first time in non atomic context as if | |
4582 | * this is the first fpu instruction the exception handler | |
4583 | * will fire before the instruction returns and it'll have to | |
4584 | * allocate ram with GFP_KERNEL. | |
4585 | */ | |
4586 | if (!used_math()) | |
d6e88aec | 4587 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 4588 | |
d0752060 HB |
4589 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
4590 | preempt_disable(); | |
d6e88aec AK |
4591 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4592 | kvm_fx_finit(); | |
4593 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
4594 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
4595 | preempt_enable(); |
4596 | ||
ad312c7c | 4597 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 4598 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
4599 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
4600 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
4601 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
4602 | } | |
4603 | EXPORT_SYMBOL_GPL(fx_init); | |
4604 | ||
4605 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
4606 | { | |
4607 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
4608 | return; | |
4609 | ||
4610 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
4611 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4612 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
4613 | } |
4614 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
4615 | ||
4616 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
4617 | { | |
4618 | if (!vcpu->guest_fpu_loaded) | |
4619 | return; | |
4620 | ||
4621 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
4622 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
4623 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 4624 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
4625 | } |
4626 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
4627 | |
4628 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
4629 | { | |
7f1ea208 JR |
4630 | if (vcpu->arch.time_page) { |
4631 | kvm_release_page_dirty(vcpu->arch.time_page); | |
4632 | vcpu->arch.time_page = NULL; | |
4633 | } | |
4634 | ||
e9b11c17 ZX |
4635 | kvm_x86_ops->vcpu_free(vcpu); |
4636 | } | |
4637 | ||
4638 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
4639 | unsigned int id) | |
4640 | { | |
26e5215f AK |
4641 | return kvm_x86_ops->vcpu_create(kvm, id); |
4642 | } | |
e9b11c17 | 4643 | |
26e5215f AK |
4644 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
4645 | { | |
4646 | int r; | |
e9b11c17 ZX |
4647 | |
4648 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 4649 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 4650 | |
0bed3b56 | 4651 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
4652 | vcpu_load(vcpu); |
4653 | r = kvm_arch_vcpu_reset(vcpu); | |
4654 | if (r == 0) | |
4655 | r = kvm_mmu_setup(vcpu); | |
4656 | vcpu_put(vcpu); | |
4657 | if (r < 0) | |
4658 | goto free_vcpu; | |
4659 | ||
26e5215f | 4660 | return 0; |
e9b11c17 ZX |
4661 | free_vcpu: |
4662 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 4663 | return r; |
e9b11c17 ZX |
4664 | } |
4665 | ||
d40ccc62 | 4666 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
4667 | { |
4668 | vcpu_load(vcpu); | |
4669 | kvm_mmu_unload(vcpu); | |
4670 | vcpu_put(vcpu); | |
4671 | ||
4672 | kvm_x86_ops->vcpu_free(vcpu); | |
4673 | } | |
4674 | ||
4675 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
4676 | { | |
448fa4a9 JK |
4677 | vcpu->arch.nmi_pending = false; |
4678 | vcpu->arch.nmi_injected = false; | |
4679 | ||
42dbaa5a JK |
4680 | vcpu->arch.switch_db_regs = 0; |
4681 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
4682 | vcpu->arch.dr6 = DR6_FIXED_1; | |
4683 | vcpu->arch.dr7 = DR7_FIXED_1; | |
4684 | ||
e9b11c17 ZX |
4685 | return kvm_x86_ops->vcpu_reset(vcpu); |
4686 | } | |
4687 | ||
4688 | void kvm_arch_hardware_enable(void *garbage) | |
4689 | { | |
4690 | kvm_x86_ops->hardware_enable(garbage); | |
4691 | } | |
4692 | ||
4693 | void kvm_arch_hardware_disable(void *garbage) | |
4694 | { | |
4695 | kvm_x86_ops->hardware_disable(garbage); | |
4696 | } | |
4697 | ||
4698 | int kvm_arch_hardware_setup(void) | |
4699 | { | |
4700 | return kvm_x86_ops->hardware_setup(); | |
4701 | } | |
4702 | ||
4703 | void kvm_arch_hardware_unsetup(void) | |
4704 | { | |
4705 | kvm_x86_ops->hardware_unsetup(); | |
4706 | } | |
4707 | ||
4708 | void kvm_arch_check_processor_compat(void *rtn) | |
4709 | { | |
4710 | kvm_x86_ops->check_processor_compatibility(rtn); | |
4711 | } | |
4712 | ||
4713 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
4714 | { | |
4715 | struct page *page; | |
4716 | struct kvm *kvm; | |
4717 | int r; | |
4718 | ||
4719 | BUG_ON(vcpu->kvm == NULL); | |
4720 | kvm = vcpu->kvm; | |
4721 | ||
ad312c7c | 4722 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 4723 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 4724 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 4725 | else |
a4535290 | 4726 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
4727 | |
4728 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
4729 | if (!page) { | |
4730 | r = -ENOMEM; | |
4731 | goto fail; | |
4732 | } | |
ad312c7c | 4733 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
4734 | |
4735 | r = kvm_mmu_create(vcpu); | |
4736 | if (r < 0) | |
4737 | goto fail_free_pio_data; | |
4738 | ||
4739 | if (irqchip_in_kernel(kvm)) { | |
4740 | r = kvm_create_lapic(vcpu); | |
4741 | if (r < 0) | |
4742 | goto fail_mmu_destroy; | |
4743 | } | |
4744 | ||
890ca9ae HY |
4745 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
4746 | GFP_KERNEL); | |
4747 | if (!vcpu->arch.mce_banks) { | |
4748 | r = -ENOMEM; | |
4749 | goto fail_mmu_destroy; | |
4750 | } | |
4751 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
4752 | ||
e9b11c17 ZX |
4753 | return 0; |
4754 | ||
4755 | fail_mmu_destroy: | |
4756 | kvm_mmu_destroy(vcpu); | |
4757 | fail_free_pio_data: | |
ad312c7c | 4758 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
4759 | fail: |
4760 | return r; | |
4761 | } | |
4762 | ||
4763 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
4764 | { | |
4765 | kvm_free_lapic(vcpu); | |
3200f405 | 4766 | down_read(&vcpu->kvm->slots_lock); |
e9b11c17 | 4767 | kvm_mmu_destroy(vcpu); |
3200f405 | 4768 | up_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4769 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 4770 | } |
d19a9cd2 ZX |
4771 | |
4772 | struct kvm *kvm_arch_create_vm(void) | |
4773 | { | |
4774 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
4775 | ||
4776 | if (!kvm) | |
4777 | return ERR_PTR(-ENOMEM); | |
4778 | ||
f05e70ac | 4779 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 4780 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 4781 | |
5550af4d SY |
4782 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
4783 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
4784 | ||
53f658b3 MT |
4785 | rdtscll(kvm->arch.vm_init_tsc); |
4786 | ||
d19a9cd2 ZX |
4787 | return kvm; |
4788 | } | |
4789 | ||
4790 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
4791 | { | |
4792 | vcpu_load(vcpu); | |
4793 | kvm_mmu_unload(vcpu); | |
4794 | vcpu_put(vcpu); | |
4795 | } | |
4796 | ||
4797 | static void kvm_free_vcpus(struct kvm *kvm) | |
4798 | { | |
4799 | unsigned int i; | |
988a2cae | 4800 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
4801 | |
4802 | /* | |
4803 | * Unpin any mmu pages first. | |
4804 | */ | |
988a2cae GN |
4805 | kvm_for_each_vcpu(i, vcpu, kvm) |
4806 | kvm_unload_vcpu_mmu(vcpu); | |
4807 | kvm_for_each_vcpu(i, vcpu, kvm) | |
4808 | kvm_arch_vcpu_free(vcpu); | |
4809 | ||
4810 | mutex_lock(&kvm->lock); | |
4811 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
4812 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 4813 | |
988a2cae GN |
4814 | atomic_set(&kvm->online_vcpus, 0); |
4815 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
4816 | } |
4817 | ||
ad8ba2cd SY |
4818 | void kvm_arch_sync_events(struct kvm *kvm) |
4819 | { | |
ba4cef31 | 4820 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
4821 | } |
4822 | ||
d19a9cd2 ZX |
4823 | void kvm_arch_destroy_vm(struct kvm *kvm) |
4824 | { | |
6eb55818 | 4825 | kvm_iommu_unmap_guest(kvm); |
7837699f | 4826 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
4827 | kfree(kvm->arch.vpic); |
4828 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
4829 | kvm_free_vcpus(kvm); |
4830 | kvm_free_physmem(kvm); | |
3d45830c AK |
4831 | if (kvm->arch.apic_access_page) |
4832 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
4833 | if (kvm->arch.ept_identity_pagetable) |
4834 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 ZX |
4835 | kfree(kvm); |
4836 | } | |
0de10343 ZX |
4837 | |
4838 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
4839 | struct kvm_userspace_memory_region *mem, | |
4840 | struct kvm_memory_slot old, | |
4841 | int user_alloc) | |
4842 | { | |
4843 | int npages = mem->memory_size >> PAGE_SHIFT; | |
4844 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
4845 | ||
4846 | /*To keep backward compatibility with older userspace, | |
4847 | *x86 needs to hanlde !user_alloc case. | |
4848 | */ | |
4849 | if (!user_alloc) { | |
4850 | if (npages && !old.rmap) { | |
604b38ac AA |
4851 | unsigned long userspace_addr; |
4852 | ||
72dc67a6 | 4853 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
4854 | userspace_addr = do_mmap(NULL, 0, |
4855 | npages * PAGE_SIZE, | |
4856 | PROT_READ | PROT_WRITE, | |
acee3c04 | 4857 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 4858 | 0); |
72dc67a6 | 4859 | up_write(¤t->mm->mmap_sem); |
0de10343 | 4860 | |
604b38ac AA |
4861 | if (IS_ERR((void *)userspace_addr)) |
4862 | return PTR_ERR((void *)userspace_addr); | |
4863 | ||
4864 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ | |
4865 | spin_lock(&kvm->mmu_lock); | |
4866 | memslot->userspace_addr = userspace_addr; | |
4867 | spin_unlock(&kvm->mmu_lock); | |
0de10343 ZX |
4868 | } else { |
4869 | if (!old.user_alloc && old.rmap) { | |
4870 | int ret; | |
4871 | ||
72dc67a6 | 4872 | down_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4873 | ret = do_munmap(current->mm, old.userspace_addr, |
4874 | old.npages * PAGE_SIZE); | |
72dc67a6 | 4875 | up_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4876 | if (ret < 0) |
4877 | printk(KERN_WARNING | |
4878 | "kvm_vm_ioctl_set_memory_region: " | |
4879 | "failed to munmap memory\n"); | |
4880 | } | |
4881 | } | |
4882 | } | |
4883 | ||
7c8a83b7 | 4884 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 4885 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
4886 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
4887 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
4888 | } | |
4889 | ||
4890 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 4891 | spin_unlock(&kvm->mmu_lock); |
0de10343 ZX |
4892 | kvm_flush_remote_tlbs(kvm); |
4893 | ||
4894 | return 0; | |
4895 | } | |
1d737c8a | 4896 | |
34d4cb8f MT |
4897 | void kvm_arch_flush_shadow(struct kvm *kvm) |
4898 | { | |
4899 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 4900 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
4901 | } |
4902 | ||
1d737c8a ZX |
4903 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
4904 | { | |
a4535290 | 4905 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
a1b37100 GN |
4906 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
4907 | || vcpu->arch.nmi_pending || | |
4908 | (kvm_arch_interrupt_allowed(vcpu) && | |
4909 | kvm_cpu_has_interrupt(vcpu)); | |
1d737c8a | 4910 | } |
5736199a | 4911 | |
5736199a ZX |
4912 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
4913 | { | |
32f88400 MT |
4914 | int me; |
4915 | int cpu = vcpu->cpu; | |
5736199a ZX |
4916 | |
4917 | if (waitqueue_active(&vcpu->wq)) { | |
4918 | wake_up_interruptible(&vcpu->wq); | |
4919 | ++vcpu->stat.halt_wakeup; | |
4920 | } | |
32f88400 MT |
4921 | |
4922 | me = get_cpu(); | |
4923 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
4924 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) | |
4925 | smp_send_reschedule(cpu); | |
e9571ed5 | 4926 | put_cpu(); |
5736199a | 4927 | } |
78646121 GN |
4928 | |
4929 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
4930 | { | |
4931 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
4932 | } | |
229456fc MT |
4933 | |
4934 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); | |
4935 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
4936 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
4937 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
4938 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); |