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KVM: Portability: Move kvm_vcpu_ioctl_get_dirty_log to arch-specific file
[linux-2.6-block.git] / drivers / kvm / x86.c
CommitLineData
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.
7 *
8 * Authors:
9 * Avi Kivity <avi@qumranet.com>
10 * Yaniv Kamay <yaniv@qumranet.com>
11 *
12 * This work is licensed under the terms of the GNU GPL, version 2. See
13 * the COPYING file in the top-level directory.
14 *
15 */
16
313a3dc7 17#include "kvm.h"
043405e1 18#include "x86.h"
d825ed0a 19#include "x86_emulate.h"
5fb76f9b 20#include "segment_descriptor.h"
313a3dc7
CO		 21#include "irq.h"
22
23#include <linux/kvm.h>
24#include <linux/fs.h>
25#include <linux/vmalloc.h>
5fb76f9b 26#include <linux/module.h>
043405e1
CO		 27
28#include <asm/uaccess.h>
d825ed0a 29#include <asm/msr.h>
043405e1 30
313a3dc7 31#define MAX_IO_MSRS 256
a03490ed
CO		 32#define CR0_RESERVED_BITS \
33 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
34 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
35 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
36#define CR4_RESERVED_BITS \
37 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
38 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
39 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
40 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
41
42#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
15c4a640 43#define EFER_RESERVED_BITS 0xfffffffffffff2fe
313a3dc7 44
ba1389b7
AK		 45#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
46#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
417bc304 47
97896d04
ZX		 48struct kvm_x86_ops *kvm_x86_ops;
49
417bc304 50struct kvm_stats_debugfs_item debugfs_entries[] = {
ba1389b7
AK		 51 { "pf_fixed", VCPU_STAT(pf_fixed) },
52 { "pf_guest", VCPU_STAT(pf_guest) },
53 { "tlb_flush", VCPU_STAT(tlb_flush) },
54 { "invlpg", VCPU_STAT(invlpg) },
55 { "exits", VCPU_STAT(exits) },
56 { "io_exits", VCPU_STAT(io_exits) },
57 { "mmio_exits", VCPU_STAT(mmio_exits) },
58 { "signal_exits", VCPU_STAT(signal_exits) },
59 { "irq_window", VCPU_STAT(irq_window_exits) },
60 { "halt_exits", VCPU_STAT(halt_exits) },
61 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
62 { "request_irq", VCPU_STAT(request_irq_exits) },
63 { "irq_exits", VCPU_STAT(irq_exits) },
64 { "host_state_reload", VCPU_STAT(host_state_reload) },
65 { "efer_reload", VCPU_STAT(efer_reload) },
66 { "fpu_reload", VCPU_STAT(fpu_reload) },
67 { "insn_emulation", VCPU_STAT(insn_emulation) },
68 { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
4cee5764
AK		 69 { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
70 { "mmu_pte_write", VM_STAT(mmu_pte_write) },
71 { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
72 { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) },
73 { "mmu_flooded", VM_STAT(mmu_flooded) },
74 { "mmu_recycled", VM_STAT(mmu_recycled) },
417bc304
HB		 75 { NULL }
76};
77
78
5fb76f9b
CO		 79unsigned long segment_base(u16 selector)
80{
81 struct descriptor_table gdt;
82 struct segment_descriptor *d;
83 unsigned long table_base;
84 unsigned long v;
85
86 if (selector == 0)
87 return 0;
88
89 asm("sgdt %0" : "=m"(gdt));
90 table_base = gdt.base;
91
92 if (selector & 4) { /* from ldt */
93 u16 ldt_selector;
94
95 asm("sldt %0" : "=g"(ldt_selector));
96 table_base = segment_base(ldt_selector);
97 }
98 d = (struct segment_descriptor *)(table_base + (selector & ~7));
99 v = d->base_low | ((unsigned long)d->base_mid << 16) |
100 ((unsigned long)d->base_high << 24);
101#ifdef CONFIG_X86_64
102 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
103 v |= ((unsigned long) \
104 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
105#endif
106 return v;
107}
108EXPORT_SYMBOL_GPL(segment_base);
109
6866b83e
CO		 110u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
111{
112 if (irqchip_in_kernel(vcpu->kvm))
113 return vcpu->apic_base;
114 else
115 return vcpu->apic_base;
116}
117EXPORT_SYMBOL_GPL(kvm_get_apic_base);
118
119void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
120{
121 /* TODO: reserve bits check */
122 if (irqchip_in_kernel(vcpu->kvm))
123 kvm_lapic_set_base(vcpu, data);
124 else
125 vcpu->apic_base = data;
126}
127EXPORT_SYMBOL_GPL(kvm_set_apic_base);
128
a03490ed
CO		 129static void inject_gp(struct kvm_vcpu *vcpu)
130{
131 kvm_x86_ops->inject_gp(vcpu, 0);
132}
133
134/*
135 * Load the pae pdptrs. Return true is they are all valid.
136 */
137int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
138{
139 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
140 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
141 int i;
142 int ret;
143 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
144
145 mutex_lock(&vcpu->kvm->lock);
146 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
147 offset * sizeof(u64), sizeof(pdpte));
148 if (ret < 0) {
149 ret = 0;
150 goto out;
151 }
152 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
153 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
154 ret = 0;
155 goto out;
156 }
157 }
158 ret = 1;
159
160 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
161out:
162 mutex_unlock(&vcpu->kvm->lock);
163
164 return ret;
165}
166
167void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
168{
169 if (cr0 & CR0_RESERVED_BITS) {
170 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
171 cr0, vcpu->cr0);
172 inject_gp(vcpu);
173 return;
174 }
175
176 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
177 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
178 inject_gp(vcpu);
179 return;
180 }
181
182 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
183 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
184 "and a clear PE flag\n");
185 inject_gp(vcpu);
186 return;
187 }
188
189 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
190#ifdef CONFIG_X86_64
191 if ((vcpu->shadow_efer & EFER_LME)) {
192 int cs_db, cs_l;
193
194 if (!is_pae(vcpu)) {
195 printk(KERN_DEBUG "set_cr0: #GP, start paging "
196 "in long mode while PAE is disabled\n");
197 inject_gp(vcpu);
198 return;
199 }
200 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
201 if (cs_l) {
202 printk(KERN_DEBUG "set_cr0: #GP, start paging "
203 "in long mode while CS.L == 1\n");
204 inject_gp(vcpu);
205 return;
206
207 }
208 } else
209#endif
210 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
211 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
212 "reserved bits\n");
213 inject_gp(vcpu);
214 return;
215 }
216
217 }
218
219 kvm_x86_ops->set_cr0(vcpu, cr0);
220 vcpu->cr0 = cr0;
221
222 mutex_lock(&vcpu->kvm->lock);
223 kvm_mmu_reset_context(vcpu);
224 mutex_unlock(&vcpu->kvm->lock);
225 return;
226}
227EXPORT_SYMBOL_GPL(set_cr0);
228
229void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
230{
231 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
232}
233EXPORT_SYMBOL_GPL(lmsw);
234
235void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
236{
237 if (cr4 & CR4_RESERVED_BITS) {
238 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
239 inject_gp(vcpu);
240 return;
241 }
242
243 if (is_long_mode(vcpu)) {
244 if (!(cr4 & X86_CR4_PAE)) {
245 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
246 "in long mode\n");
247 inject_gp(vcpu);
248 return;
249 }
250 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
251 && !load_pdptrs(vcpu, vcpu->cr3)) {
252 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
253 inject_gp(vcpu);
254 return;
255 }
256
257 if (cr4 & X86_CR4_VMXE) {
258 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
259 inject_gp(vcpu);
260 return;
261 }
262 kvm_x86_ops->set_cr4(vcpu, cr4);
263 vcpu->cr4 = cr4;
264 mutex_lock(&vcpu->kvm->lock);
265 kvm_mmu_reset_context(vcpu);
266 mutex_unlock(&vcpu->kvm->lock);
267}
268EXPORT_SYMBOL_GPL(set_cr4);
269
270void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
271{
272 if (is_long_mode(vcpu)) {
273 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
274 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
275 inject_gp(vcpu);
276 return;
277 }
278 } else {
279 if (is_pae(vcpu)) {
280 if (cr3 & CR3_PAE_RESERVED_BITS) {
281 printk(KERN_DEBUG
282 "set_cr3: #GP, reserved bits\n");
283 inject_gp(vcpu);
284 return;
285 }
286 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
287 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
288 "reserved bits\n");
289 inject_gp(vcpu);
290 return;
291 }
292 }
293 /*
294 * We don't check reserved bits in nonpae mode, because
295 * this isn't enforced, and VMware depends on this.
296 */
297 }
298
299 mutex_lock(&vcpu->kvm->lock);
300 /*
301 * Does the new cr3 value map to physical memory? (Note, we
302 * catch an invalid cr3 even in real-mode, because it would
303 * cause trouble later on when we turn on paging anyway.)
304 *
305 * A real CPU would silently accept an invalid cr3 and would
306 * attempt to use it - with largely undefined (and often hard
307 * to debug) behavior on the guest side.
308 */
309 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
310 inject_gp(vcpu);
311 else {
312 vcpu->cr3 = cr3;
313 vcpu->mmu.new_cr3(vcpu);
314 }
315 mutex_unlock(&vcpu->kvm->lock);
316}
317EXPORT_SYMBOL_GPL(set_cr3);
318
319void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
320{
321 if (cr8 & CR8_RESERVED_BITS) {
322 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
323 inject_gp(vcpu);
324 return;
325 }
326 if (irqchip_in_kernel(vcpu->kvm))
327 kvm_lapic_set_tpr(vcpu, cr8);
328 else
329 vcpu->cr8 = cr8;
330}
331EXPORT_SYMBOL_GPL(set_cr8);
332
333unsigned long get_cr8(struct kvm_vcpu *vcpu)
334{
335 if (irqchip_in_kernel(vcpu->kvm))
336 return kvm_lapic_get_cr8(vcpu);
337 else
338 return vcpu->cr8;
339}
340EXPORT_SYMBOL_GPL(get_cr8);
341
043405e1
CO		 342/*
343 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
344 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
345 *
346 * This list is modified at module load time to reflect the
347 * capabilities of the host cpu.
348 */
349static u32 msrs_to_save[] = {
350 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
351 MSR_K6_STAR,
352#ifdef CONFIG_X86_64
353 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
354#endif
355 MSR_IA32_TIME_STAMP_COUNTER,
356};
357
358static unsigned num_msrs_to_save;
359
360static u32 emulated_msrs[] = {
361 MSR_IA32_MISC_ENABLE,
362};
363
15c4a640
CO		 364#ifdef CONFIG_X86_64
365
366static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
367{
368 if (efer & EFER_RESERVED_BITS) {
369 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
370 efer);
371 inject_gp(vcpu);
372 return;
373 }
374
375 if (is_paging(vcpu)
376 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
377 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
378 inject_gp(vcpu);
379 return;
380 }
381
382 kvm_x86_ops->set_efer(vcpu, efer);
383
384 efer &= ~EFER_LMA;
385 efer |= vcpu->shadow_efer & EFER_LMA;
386
387 vcpu->shadow_efer = efer;
388}
389
390#endif
391
392/*
393 * Writes msr value into into the appropriate "register".
394 * Returns 0 on success, non-0 otherwise.
395 * Assumes vcpu_load() was already called.
396 */
397int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
398{
399 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
400}
401
313a3dc7
CO		 402/*
403 * Adapt set_msr() to msr_io()'s calling convention
404 */
405static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
406{
407 return kvm_set_msr(vcpu, index, *data);
408}
409
15c4a640
CO		 410
411int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
412{
413 switch (msr) {
414#ifdef CONFIG_X86_64
415 case MSR_EFER:
416 set_efer(vcpu, data);
417 break;
418#endif
419 case MSR_IA32_MC0_STATUS:
420 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
421 __FUNCTION__, data);
422 break;
423 case MSR_IA32_MCG_STATUS:
424 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
425 __FUNCTION__, data);
426 break;
427 case MSR_IA32_UCODE_REV:
428 case MSR_IA32_UCODE_WRITE:
429 case 0x200 ... 0x2ff: /* MTRRs */
430 break;
431 case MSR_IA32_APICBASE:
432 kvm_set_apic_base(vcpu, data);
433 break;
434 case MSR_IA32_MISC_ENABLE:
435 vcpu->ia32_misc_enable_msr = data;
436 break;
437 default:
438 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
439 return 1;
440 }
441 return 0;
442}
443EXPORT_SYMBOL_GPL(kvm_set_msr_common);
444
445
446/*
447 * Reads an msr value (of 'msr_index') into 'pdata'.
448 * Returns 0 on success, non-0 otherwise.
449 * Assumes vcpu_load() was already called.
450 */
451int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
452{
453 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
454}
455
456int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
457{
458 u64 data;
459
460 switch (msr) {
461 case 0xc0010010: /* SYSCFG */
462 case 0xc0010015: /* HWCR */
463 case MSR_IA32_PLATFORM_ID:
464 case MSR_IA32_P5_MC_ADDR:
465 case MSR_IA32_P5_MC_TYPE:
466 case MSR_IA32_MC0_CTL:
467 case MSR_IA32_MCG_STATUS:
468 case MSR_IA32_MCG_CAP:
469 case MSR_IA32_MC0_MISC:
470 case MSR_IA32_MC0_MISC+4:
471 case MSR_IA32_MC0_MISC+8:
472 case MSR_IA32_MC0_MISC+12:
473 case MSR_IA32_MC0_MISC+16:
474 case MSR_IA32_UCODE_REV:
475 case MSR_IA32_PERF_STATUS:
476 case MSR_IA32_EBL_CR_POWERON:
477 /* MTRR registers */
478 case 0xfe:
479 case 0x200 ... 0x2ff:
480 data = 0;
481 break;
482 case 0xcd: /* fsb frequency */
483 data = 3;
484 break;
485 case MSR_IA32_APICBASE:
486 data = kvm_get_apic_base(vcpu);
487 break;
488 case MSR_IA32_MISC_ENABLE:
489 data = vcpu->ia32_misc_enable_msr;
490 break;
491#ifdef CONFIG_X86_64
492 case MSR_EFER:
493 data = vcpu->shadow_efer;
494 break;
495#endif
496 default:
497 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
498 return 1;
499 }
500 *pdata = data;
501 return 0;
502}
503EXPORT_SYMBOL_GPL(kvm_get_msr_common);
504
313a3dc7
CO		 505/*
506 * Read or write a bunch of msrs. All parameters are kernel addresses.
507 *
508 * @return number of msrs set successfully.
509 */
510static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
511 struct kvm_msr_entry *entries,
512 int (*do_msr)(struct kvm_vcpu *vcpu,
513 unsigned index, u64 *data))
514{
515 int i;
516
517 vcpu_load(vcpu);
518
519 for (i = 0; i < msrs->nmsrs; ++i)
520 if (do_msr(vcpu, entries[i].index, &entries[i].data))
521 break;
522
523 vcpu_put(vcpu);
524
525 return i;
526}
527
528/*
529 * Read or write a bunch of msrs. Parameters are user addresses.
530 *
531 * @return number of msrs set successfully.
532 */
533static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
534 int (*do_msr)(struct kvm_vcpu *vcpu,
535 unsigned index, u64 *data),
536 int writeback)
537{
538 struct kvm_msrs msrs;
539 struct kvm_msr_entry *entries;
540 int r, n;
541 unsigned size;
542
543 r = -EFAULT;
544 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
545 goto out;
546
547 r = -E2BIG;
548 if (msrs.nmsrs >= MAX_IO_MSRS)
549 goto out;
550
551 r = -ENOMEM;
552 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
553 entries = vmalloc(size);
554 if (!entries)
555 goto out;
556
557 r = -EFAULT;
558 if (copy_from_user(entries, user_msrs->entries, size))
559 goto out_free;
560
561 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
562 if (r < 0)
563 goto out_free;
564
565 r = -EFAULT;
566 if (writeback && copy_to_user(user_msrs->entries, entries, size))
567 goto out_free;
568
569 r = n;
570
571out_free:
572 vfree(entries);
573out:
574 return r;
575}
576
e9b11c17
ZX		 577/*
578 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
579 * cached on it.
580 */
581void decache_vcpus_on_cpu(int cpu)
582{
583 struct kvm *vm;
584 struct kvm_vcpu *vcpu;
585 int i;
586
587 spin_lock(&kvm_lock);
588 list_for_each_entry(vm, &vm_list, vm_list)
589 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
590 vcpu = vm->vcpus[i];
591 if (!vcpu)
592 continue;
593 /*
594 * If the vcpu is locked, then it is running on some
595 * other cpu and therefore it is not cached on the
596 * cpu in question.
597 *
598 * If it's not locked, check the last cpu it executed
599 * on.
600 */
601 if (mutex_trylock(&vcpu->mutex)) {
602 if (vcpu->cpu == cpu) {
603 kvm_x86_ops->vcpu_decache(vcpu);
604 vcpu->cpu = -1;
605 }
606 mutex_unlock(&vcpu->mutex);
607 }
608 }
609 spin_unlock(&kvm_lock);
610}
611
018d00d2
ZX		 612int kvm_dev_ioctl_check_extension(long ext)
613{
614 int r;
615
616 switch (ext) {
617 case KVM_CAP_IRQCHIP:
618 case KVM_CAP_HLT:
619 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
620 case KVM_CAP_USER_MEMORY:
621 case KVM_CAP_SET_TSS_ADDR:
622 r = 1;
623 break;
624 default:
625 r = 0;
626 break;
627 }
628 return r;
629
630}
631
043405e1
CO		 632long kvm_arch_dev_ioctl(struct file *filp,
633 unsigned int ioctl, unsigned long arg)
634{
635 void __user *argp = (void __user *)arg;
636 long r;
637
638 switch (ioctl) {
639 case KVM_GET_MSR_INDEX_LIST: {
640 struct kvm_msr_list __user *user_msr_list = argp;
641 struct kvm_msr_list msr_list;
642 unsigned n;
643
644 r = -EFAULT;
645 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
646 goto out;
647 n = msr_list.nmsrs;
648 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
649 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
650 goto out;
651 r = -E2BIG;
652 if (n < num_msrs_to_save)
653 goto out;
654 r = -EFAULT;
655 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
656 num_msrs_to_save * sizeof(u32)))
657 goto out;
658 if (copy_to_user(user_msr_list->indices
659 + num_msrs_to_save * sizeof(u32),
660 &emulated_msrs,
661 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
662 goto out;
663 r = 0;
664 break;
665 }
666 default:
667 r = -EINVAL;
668 }
669out:
670 return r;
671}
672
313a3dc7
CO		 673void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
674{
675 kvm_x86_ops->vcpu_load(vcpu, cpu);
676}
677
678void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
679{
680 kvm_x86_ops->vcpu_put(vcpu);
9327fd11 681 kvm_put_guest_fpu(vcpu);
313a3dc7
CO		 682}
683
684static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
685{
686 u64 efer;
687 int i;
688 struct kvm_cpuid_entry *e, *entry;
689
690 rdmsrl(MSR_EFER, efer);
691 entry = NULL;
692 for (i = 0; i < vcpu->cpuid_nent; ++i) {
693 e = &vcpu->cpuid_entries[i];
694 if (e->function == 0x80000001) {
695 entry = e;
696 break;
697 }
698 }
699 if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
700 entry->edx &= ~(1 << 20);
701 printk(KERN_INFO "kvm: guest NX capability removed\n");
702 }
703}
704
705static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
706 struct kvm_cpuid *cpuid,
707 struct kvm_cpuid_entry __user *entries)
708{
709 int r;
710
711 r = -E2BIG;
712 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
713 goto out;
714 r = -EFAULT;
715 if (copy_from_user(&vcpu->cpuid_entries, entries,
716 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
717 goto out;
718 vcpu->cpuid_nent = cpuid->nent;
719 cpuid_fix_nx_cap(vcpu);
720 return 0;
721
722out:
723 return r;
724}
725
726static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
727 struct kvm_lapic_state *s)
728{
729 vcpu_load(vcpu);
730 memcpy(s->regs, vcpu->apic->regs, sizeof *s);
731 vcpu_put(vcpu);
732
733 return 0;
734}
735
736static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
737 struct kvm_lapic_state *s)
738{
739 vcpu_load(vcpu);
740 memcpy(vcpu->apic->regs, s->regs, sizeof *s);
741 kvm_apic_post_state_restore(vcpu);
742 vcpu_put(vcpu);
743
744 return 0;
745}
746
747long kvm_arch_vcpu_ioctl(struct file *filp,
748 unsigned int ioctl, unsigned long arg)
749{
750 struct kvm_vcpu *vcpu = filp->private_data;
751 void __user *argp = (void __user *)arg;
752 int r;
753
754 switch (ioctl) {
755 case KVM_GET_LAPIC: {
756 struct kvm_lapic_state lapic;
757
758 memset(&lapic, 0, sizeof lapic);
759 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
760 if (r)
761 goto out;
762 r = -EFAULT;
763 if (copy_to_user(argp, &lapic, sizeof lapic))
764 goto out;
765 r = 0;
766 break;
767 }
768 case KVM_SET_LAPIC: {
769 struct kvm_lapic_state lapic;
770
771 r = -EFAULT;
772 if (copy_from_user(&lapic, argp, sizeof lapic))
773 goto out;
774 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
775 if (r)
776 goto out;
777 r = 0;
778 break;
779 }
780 case KVM_SET_CPUID: {
781 struct kvm_cpuid __user *cpuid_arg = argp;
782 struct kvm_cpuid cpuid;
783
784 r = -EFAULT;
785 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
786 goto out;
787 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
788 if (r)
789 goto out;
790 break;
791 }
792 case KVM_GET_MSRS:
793 r = msr_io(vcpu, argp, kvm_get_msr, 1);
794 break;
795 case KVM_SET_MSRS:
796 r = msr_io(vcpu, argp, do_set_msr, 0);
797 break;
798 default:
799 r = -EINVAL;
800 }
801out:
802 return r;
803}
804
1fe779f8
CO		 805static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr)
806{
807 int ret;
808
809 if (addr > (unsigned int)(-3 * PAGE_SIZE))
810 return -1;
811 ret = kvm_x86_ops->set_tss_addr(kvm, addr);
812 return ret;
813}
814
815static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
816 u32 kvm_nr_mmu_pages)
817{
818 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
819 return -EINVAL;
820
821 mutex_lock(&kvm->lock);
822
823 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
824 kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
825
826 mutex_unlock(&kvm->lock);
827 return 0;
828}
829
830static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
831{
832 return kvm->n_alloc_mmu_pages;
833}
834
835/*
836 * Set a new alias region. Aliases map a portion of physical memory into
837 * another portion. This is useful for memory windows, for example the PC
838 * VGA region.
839 */
840static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
841 struct kvm_memory_alias *alias)
842{
843 int r, n;
844 struct kvm_mem_alias *p;
845
846 r = -EINVAL;
847 /* General sanity checks */
848 if (alias->memory_size & (PAGE_SIZE - 1))
849 goto out;
850 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
851 goto out;
852 if (alias->slot >= KVM_ALIAS_SLOTS)
853 goto out;
854 if (alias->guest_phys_addr + alias->memory_size
855 < alias->guest_phys_addr)
856 goto out;
857 if (alias->target_phys_addr + alias->memory_size
858 < alias->target_phys_addr)
859 goto out;
860
861 mutex_lock(&kvm->lock);
862
863 p = &kvm->aliases[alias->slot];
864 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
865 p->npages = alias->memory_size >> PAGE_SHIFT;
866 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
867
868 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
869 if (kvm->aliases[n - 1].npages)
870 break;
871 kvm->naliases = n;
872
873 kvm_mmu_zap_all(kvm);
874
875 mutex_unlock(&kvm->lock);
876
877 return 0;
878
879out:
880 return r;
881}
882
883static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
884{
885 int r;
886
887 r = 0;
888 switch (chip->chip_id) {
889 case KVM_IRQCHIP_PIC_MASTER:
890 memcpy(&chip->chip.pic,
891 &pic_irqchip(kvm)->pics[0],
892 sizeof(struct kvm_pic_state));
893 break;
894 case KVM_IRQCHIP_PIC_SLAVE:
895 memcpy(&chip->chip.pic,
896 &pic_irqchip(kvm)->pics[1],
897 sizeof(struct kvm_pic_state));
898 break;
899 case KVM_IRQCHIP_IOAPIC:
900 memcpy(&chip->chip.ioapic,
901 ioapic_irqchip(kvm),
902 sizeof(struct kvm_ioapic_state));
903 break;
904 default:
905 r = -EINVAL;
906 break;
907 }
908 return r;
909}
910
911static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
912{
913 int r;
914
915 r = 0;
916 switch (chip->chip_id) {
917 case KVM_IRQCHIP_PIC_MASTER:
918 memcpy(&pic_irqchip(kvm)->pics[0],
919 &chip->chip.pic,
920 sizeof(struct kvm_pic_state));
921 break;
922 case KVM_IRQCHIP_PIC_SLAVE:
923 memcpy(&pic_irqchip(kvm)->pics[1],
924 &chip->chip.pic,
925 sizeof(struct kvm_pic_state));
926 break;
927 case KVM_IRQCHIP_IOAPIC:
928 memcpy(ioapic_irqchip(kvm),
929 &chip->chip.ioapic,
930 sizeof(struct kvm_ioapic_state));
931 break;
932 default:
933 r = -EINVAL;
934 break;
935 }
936 kvm_pic_update_irq(pic_irqchip(kvm));
937 return r;
938}
939
5bb064dc
ZX		 940/*
941 * Get (and clear) the dirty memory log for a memory slot.
942 */
943int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
944 struct kvm_dirty_log *log)
945{
946 int r;
947 int n;
948 struct kvm_memory_slot *memslot;
949 int is_dirty = 0;
950
951 mutex_lock(&kvm->lock);
952
953 r = kvm_get_dirty_log(kvm, log, &is_dirty);
954 if (r)
955 goto out;
956
957 /* If nothing is dirty, don't bother messing with page tables. */
958 if (is_dirty) {
959 kvm_mmu_slot_remove_write_access(kvm, log->slot);
960 kvm_flush_remote_tlbs(kvm);
961 memslot = &kvm->memslots[log->slot];
962 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
963 memset(memslot->dirty_bitmap, 0, n);
964 }
965 r = 0;
966out:
967 mutex_unlock(&kvm->lock);
968 return r;
969}
970
1fe779f8
CO		 971long kvm_arch_vm_ioctl(struct file *filp,
972 unsigned int ioctl, unsigned long arg)
973{
974 struct kvm *kvm = filp->private_data;
975 void __user *argp = (void __user *)arg;
976 int r = -EINVAL;
977
978 switch (ioctl) {
979 case KVM_SET_TSS_ADDR:
980 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
981 if (r < 0)
982 goto out;
983 break;
984 case KVM_SET_MEMORY_REGION: {
985 struct kvm_memory_region kvm_mem;
986 struct kvm_userspace_memory_region kvm_userspace_mem;
987
988 r = -EFAULT;
989 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
990 goto out;
991 kvm_userspace_mem.slot = kvm_mem.slot;
992 kvm_userspace_mem.flags = kvm_mem.flags;
993 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
994 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
995 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
996 if (r)
997 goto out;
998 break;
999 }
1000 case KVM_SET_NR_MMU_PAGES:
1001 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
1002 if (r)
1003 goto out;
1004 break;
1005 case KVM_GET_NR_MMU_PAGES:
1006 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
1007 break;
1008 case KVM_SET_MEMORY_ALIAS: {
1009 struct kvm_memory_alias alias;
1010
1011 r = -EFAULT;
1012 if (copy_from_user(&alias, argp, sizeof alias))
1013 goto out;
1014 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
1015 if (r)
1016 goto out;
1017 break;
1018 }
1019 case KVM_CREATE_IRQCHIP:
1020 r = -ENOMEM;
1021 kvm->vpic = kvm_create_pic(kvm);
1022 if (kvm->vpic) {
1023 r = kvm_ioapic_init(kvm);
1024 if (r) {
1025 kfree(kvm->vpic);
1026 kvm->vpic = NULL;
1027 goto out;
1028 }
1029 } else
1030 goto out;
1031 break;
1032 case KVM_IRQ_LINE: {
1033 struct kvm_irq_level irq_event;
1034
1035 r = -EFAULT;
1036 if (copy_from_user(&irq_event, argp, sizeof irq_event))
1037 goto out;
1038 if (irqchip_in_kernel(kvm)) {
1039 mutex_lock(&kvm->lock);
1040 if (irq_event.irq < 16)
1041 kvm_pic_set_irq(pic_irqchip(kvm),
1042 irq_event.irq,
1043 irq_event.level);
1044 kvm_ioapic_set_irq(kvm->vioapic,
1045 irq_event.irq,
1046 irq_event.level);
1047 mutex_unlock(&kvm->lock);
1048 r = 0;
1049 }
1050 break;
1051 }
1052 case KVM_GET_IRQCHIP: {
1053 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1054 struct kvm_irqchip chip;
1055
1056 r = -EFAULT;
1057 if (copy_from_user(&chip, argp, sizeof chip))
1058 goto out;
1059 r = -ENXIO;
1060 if (!irqchip_in_kernel(kvm))
1061 goto out;
1062 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1063 if (r)
1064 goto out;
1065 r = -EFAULT;
1066 if (copy_to_user(argp, &chip, sizeof chip))
1067 goto out;
1068 r = 0;
1069 break;
1070 }
1071 case KVM_SET_IRQCHIP: {
1072 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1073 struct kvm_irqchip chip;
1074
1075 r = -EFAULT;
1076 if (copy_from_user(&chip, argp, sizeof chip))
1077 goto out;
1078 r = -ENXIO;
1079 if (!irqchip_in_kernel(kvm))
1080 goto out;
1081 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1082 if (r)
1083 goto out;
1084 r = 0;
1085 break;
1086 }
1087 default:
1088 ;
1089 }
1090out:
1091 return r;
1092}
1093
a16b043c 1094static void kvm_init_msr_list(void)
043405e1
CO		 1095{
1096 u32 dummy[2];
1097 unsigned i, j;
1098
1099 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1100 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1101 continue;
1102 if (j < i)
1103 msrs_to_save[j] = msrs_to_save[i];
1104 j++;
1105 }
1106 num_msrs_to_save = j;
1107}
1108
bbd9b64e
CO		 1109/*
1110 * Only apic need an MMIO device hook, so shortcut now..
1111 */
1112static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1113 gpa_t addr)
1114{
1115 struct kvm_io_device *dev;
1116
1117 if (vcpu->apic) {
1118 dev = &vcpu->apic->dev;
1119 if (dev->in_range(dev, addr))
1120 return dev;
1121 }
1122 return NULL;
1123}
1124
1125
1126static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1127 gpa_t addr)
1128{
1129 struct kvm_io_device *dev;
1130
1131 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1132 if (dev == NULL)
1133 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1134 return dev;
1135}
1136
1137int emulator_read_std(unsigned long addr,
1138 void *val,
1139 unsigned int bytes,
1140 struct kvm_vcpu *vcpu)
1141{
1142 void *data = val;
1143
1144 while (bytes) {
1145 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1146 unsigned offset = addr & (PAGE_SIZE-1);
1147 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1148 int ret;
1149
1150 if (gpa == UNMAPPED_GVA)
1151 return X86EMUL_PROPAGATE_FAULT;
1152 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1153 if (ret < 0)
1154 return X86EMUL_UNHANDLEABLE;
1155
1156 bytes -= tocopy;
1157 data += tocopy;
1158 addr += tocopy;
1159 }
1160
1161 return X86EMUL_CONTINUE;
1162}
1163EXPORT_SYMBOL_GPL(emulator_read_std);
1164
1165static int emulator_write_std(unsigned long addr,
1166 const void *val,
1167 unsigned int bytes,
1168 struct kvm_vcpu *vcpu)
1169{
1170 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
1171 return X86EMUL_UNHANDLEABLE;
1172}
1173
1174static int emulator_read_emulated(unsigned long addr,
1175 void *val,
1176 unsigned int bytes,
1177 struct kvm_vcpu *vcpu)
1178{
1179 struct kvm_io_device *mmio_dev;
1180 gpa_t gpa;
1181
1182 if (vcpu->mmio_read_completed) {
1183 memcpy(val, vcpu->mmio_data, bytes);
1184 vcpu->mmio_read_completed = 0;
1185 return X86EMUL_CONTINUE;
1186 }
1187
1188 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1189
1190 /* For APIC access vmexit */
1191 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1192 goto mmio;
1193
1194 if (emulator_read_std(addr, val, bytes, vcpu)
1195 == X86EMUL_CONTINUE)
1196 return X86EMUL_CONTINUE;
1197 if (gpa == UNMAPPED_GVA)
1198 return X86EMUL_PROPAGATE_FAULT;
1199
1200mmio:
1201 /*
1202 * Is this MMIO handled locally?
1203 */
1204 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1205 if (mmio_dev) {
1206 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1207 return X86EMUL_CONTINUE;
1208 }
1209
1210 vcpu->mmio_needed = 1;
1211 vcpu->mmio_phys_addr = gpa;
1212 vcpu->mmio_size = bytes;
1213 vcpu->mmio_is_write = 0;
1214
1215 return X86EMUL_UNHANDLEABLE;
1216}
1217
1218static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1219 const void *val, int bytes)
1220{
1221 int ret;
1222
1223 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1224 if (ret < 0)
1225 return 0;
1226 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
1227 return 1;
1228}
1229
1230static int emulator_write_emulated_onepage(unsigned long addr,
1231 const void *val,
1232 unsigned int bytes,
1233 struct kvm_vcpu *vcpu)
1234{
1235 struct kvm_io_device *mmio_dev;
1236 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1237
1238 if (gpa == UNMAPPED_GVA) {
1239 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
1240 return X86EMUL_PROPAGATE_FAULT;
1241 }
1242
1243 /* For APIC access vmexit */
1244 if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
1245 goto mmio;
1246
1247 if (emulator_write_phys(vcpu, gpa, val, bytes))
1248 return X86EMUL_CONTINUE;
1249
1250mmio:
1251 /*
1252 * Is this MMIO handled locally?
1253 */
1254 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1255 if (mmio_dev) {
1256 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1257 return X86EMUL_CONTINUE;
1258 }
1259
1260 vcpu->mmio_needed = 1;
1261 vcpu->mmio_phys_addr = gpa;
1262 vcpu->mmio_size = bytes;
1263 vcpu->mmio_is_write = 1;
1264 memcpy(vcpu->mmio_data, val, bytes);
1265
1266 return X86EMUL_CONTINUE;
1267}
1268
1269int emulator_write_emulated(unsigned long addr,
1270 const void *val,
1271 unsigned int bytes,
1272 struct kvm_vcpu *vcpu)
1273{
1274 /* Crossing a page boundary? */
1275 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1276 int rc, now;
1277
1278 now = -addr & ~PAGE_MASK;
1279 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
1280 if (rc != X86EMUL_CONTINUE)
1281 return rc;
1282 addr += now;
1283 val += now;
1284 bytes -= now;
1285 }
1286 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
1287}
1288EXPORT_SYMBOL_GPL(emulator_write_emulated);
1289
1290static int emulator_cmpxchg_emulated(unsigned long addr,
1291 const void *old,
1292 const void *new,
1293 unsigned int bytes,
1294 struct kvm_vcpu *vcpu)
1295{
1296 static int reported;
1297
1298 if (!reported) {
1299 reported = 1;
1300 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1301 }
1302 return emulator_write_emulated(addr, new, bytes, vcpu);
1303}
1304
1305static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1306{
1307 return kvm_x86_ops->get_segment_base(vcpu, seg);
1308}
1309
1310int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1311{
1312 return X86EMUL_CONTINUE;
1313}
1314
1315int emulate_clts(struct kvm_vcpu *vcpu)
1316{
1317 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
1318 return X86EMUL_CONTINUE;
1319}
1320
1321int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
1322{
1323 struct kvm_vcpu *vcpu = ctxt->vcpu;
1324
1325 switch (dr) {
1326 case 0 ... 3:
1327 *dest = kvm_x86_ops->get_dr(vcpu, dr);
1328 return X86EMUL_CONTINUE;
1329 default:
1330 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
1331 return X86EMUL_UNHANDLEABLE;
1332 }
1333}
1334
1335int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1336{
1337 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1338 int exception;
1339
1340 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1341 if (exception) {
1342 /* FIXME: better handling */
1343 return X86EMUL_UNHANDLEABLE;
1344 }
1345 return X86EMUL_CONTINUE;
1346}
1347
1348void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
1349{
1350 static int reported;
1351 u8 opcodes[4];
1352 unsigned long rip = vcpu->rip;
1353 unsigned long rip_linear;
1354
1355 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
1356
1357 if (reported)
1358 return;
1359
1360 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
1361
1362 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1363 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1364 reported = 1;
1365}
1366EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
1367
1368struct x86_emulate_ops emulate_ops = {
1369 .read_std = emulator_read_std,
1370 .write_std = emulator_write_std,
1371 .read_emulated = emulator_read_emulated,
1372 .write_emulated = emulator_write_emulated,
1373 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1374};
1375
1376int emulate_instruction(struct kvm_vcpu *vcpu,
1377 struct kvm_run *run,
1378 unsigned long cr2,
1379 u16 error_code,
1380 int no_decode)
1381{
1382 int r;
1383
1384 vcpu->mmio_fault_cr2 = cr2;
1385 kvm_x86_ops->cache_regs(vcpu);
1386
1387 vcpu->mmio_is_write = 0;
1388 vcpu->pio.string = 0;
1389
1390 if (!no_decode) {
1391 int cs_db, cs_l;
1392 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1393
1394 vcpu->emulate_ctxt.vcpu = vcpu;
1395 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1396 vcpu->emulate_ctxt.cr2 = cr2;
1397 vcpu->emulate_ctxt.mode =
1398 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1399 ? X86EMUL_MODE_REAL : cs_l
1400 ? X86EMUL_MODE_PROT64 : cs_db
1401 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1402
1403 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1404 vcpu->emulate_ctxt.cs_base = 0;
1405 vcpu->emulate_ctxt.ds_base = 0;
1406 vcpu->emulate_ctxt.es_base = 0;
1407 vcpu->emulate_ctxt.ss_base = 0;
1408 } else {
1409 vcpu->emulate_ctxt.cs_base =
1410 get_segment_base(vcpu, VCPU_SREG_CS);
1411 vcpu->emulate_ctxt.ds_base =
1412 get_segment_base(vcpu, VCPU_SREG_DS);
1413 vcpu->emulate_ctxt.es_base =
1414 get_segment_base(vcpu, VCPU_SREG_ES);
1415 vcpu->emulate_ctxt.ss_base =
1416 get_segment_base(vcpu, VCPU_SREG_SS);
1417 }
1418
1419 vcpu->emulate_ctxt.gs_base =
1420 get_segment_base(vcpu, VCPU_SREG_GS);
1421 vcpu->emulate_ctxt.fs_base =
1422 get_segment_base(vcpu, VCPU_SREG_FS);
1423
1424 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
f2b5756b 1425 ++vcpu->stat.insn_emulation;
bbd9b64e 1426 if (r) {
f2b5756b 1427 ++vcpu->stat.insn_emulation_fail;
bbd9b64e
CO		 1428 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1429 return EMULATE_DONE;
1430 return EMULATE_FAIL;
1431 }
1432 }
1433
1434 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1435
1436 if (vcpu->pio.string)
1437 return EMULATE_DO_MMIO;
1438
1439 if ((r || vcpu->mmio_is_write) && run) {
1440 run->exit_reason = KVM_EXIT_MMIO;
1441 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1442 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1443 run->mmio.len = vcpu->mmio_size;
1444 run->mmio.is_write = vcpu->mmio_is_write;
1445 }
1446
1447 if (r) {
1448 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1449 return EMULATE_DONE;
1450 if (!vcpu->mmio_needed) {
1451 kvm_report_emulation_failure(vcpu, "mmio");
1452 return EMULATE_FAIL;
1453 }
1454 return EMULATE_DO_MMIO;
1455 }
1456
1457 kvm_x86_ops->decache_regs(vcpu);
1458 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
1459
1460 if (vcpu->mmio_is_write) {
1461 vcpu->mmio_needed = 0;
1462 return EMULATE_DO_MMIO;
1463 }
1464
1465 return EMULATE_DONE;
1466}
1467EXPORT_SYMBOL_GPL(emulate_instruction);
1468
de7d789a
CO		 1469static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
1470{
1471 int i;
1472
1473 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
1474 if (vcpu->pio.guest_pages[i]) {
1475 kvm_release_page(vcpu->pio.guest_pages[i]);
1476 vcpu->pio.guest_pages[i] = NULL;
1477 }
1478}
1479
1480static int pio_copy_data(struct kvm_vcpu *vcpu)
1481{
1482 void *p = vcpu->pio_data;
1483 void *q;
1484 unsigned bytes;
1485 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1486
1487 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1488 PAGE_KERNEL);
1489 if (!q) {
1490 free_pio_guest_pages(vcpu);
1491 return -ENOMEM;
1492 }
1493 q += vcpu->pio.guest_page_offset;
1494 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1495 if (vcpu->pio.in)
1496 memcpy(q, p, bytes);
1497 else
1498 memcpy(p, q, bytes);
1499 q -= vcpu->pio.guest_page_offset;
1500 vunmap(q);
1501 free_pio_guest_pages(vcpu);
1502 return 0;
1503}
1504
1505int complete_pio(struct kvm_vcpu *vcpu)
1506{
1507 struct kvm_pio_request *io = &vcpu->pio;
1508 long delta;
1509 int r;
1510
1511 kvm_x86_ops->cache_regs(vcpu);
1512
1513 if (!io->string) {
1514 if (io->in)
1515 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
1516 io->size);
1517 } else {
1518 if (io->in) {
1519 r = pio_copy_data(vcpu);
1520 if (r) {
1521 kvm_x86_ops->cache_regs(vcpu);
1522 return r;
1523 }
1524 }
1525
1526 delta = 1;
1527 if (io->rep) {
1528 delta *= io->cur_count;
1529 /*
1530 * The size of the register should really depend on
1531 * current address size.
1532 */
1533 vcpu->regs[VCPU_REGS_RCX] -= delta;
1534 }
1535 if (io->down)
1536 delta = -delta;
1537 delta *= io->size;
1538 if (io->in)
1539 vcpu->regs[VCPU_REGS_RDI] += delta;
1540 else
1541 vcpu->regs[VCPU_REGS_RSI] += delta;
1542 }
1543
1544 kvm_x86_ops->decache_regs(vcpu);
1545
1546 io->count -= io->cur_count;
1547 io->cur_count = 0;
1548
1549 return 0;
1550}
1551
1552static void kernel_pio(struct kvm_io_device *pio_dev,
1553 struct kvm_vcpu *vcpu,
1554 void *pd)
1555{
1556 /* TODO: String I/O for in kernel device */
1557
1558 mutex_lock(&vcpu->kvm->lock);
1559 if (vcpu->pio.in)
1560 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1561 vcpu->pio.size,
1562 pd);
1563 else
1564 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1565 vcpu->pio.size,
1566 pd);
1567 mutex_unlock(&vcpu->kvm->lock);
1568}
1569
1570static void pio_string_write(struct kvm_io_device *pio_dev,
1571 struct kvm_vcpu *vcpu)
1572{
1573 struct kvm_pio_request *io = &vcpu->pio;
1574 void *pd = vcpu->pio_data;
1575 int i;
1576
1577 mutex_lock(&vcpu->kvm->lock);
1578 for (i = 0; i < io->cur_count; i++) {
1579 kvm_iodevice_write(pio_dev, io->port,
1580 io->size,
1581 pd);
1582 pd += io->size;
1583 }
1584 mutex_unlock(&vcpu->kvm->lock);
1585}
1586
1587static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1588 gpa_t addr)
1589{
1590 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1591}
1592
1593int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1594 int size, unsigned port)
1595{
1596 struct kvm_io_device *pio_dev;
1597
1598 vcpu->run->exit_reason = KVM_EXIT_IO;
1599 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1600 vcpu->run->io.size = vcpu->pio.size = size;
1601 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1602 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1603 vcpu->run->io.port = vcpu->pio.port = port;
1604 vcpu->pio.in = in;
1605 vcpu->pio.string = 0;
1606 vcpu->pio.down = 0;
1607 vcpu->pio.guest_page_offset = 0;
1608 vcpu->pio.rep = 0;
1609
1610 kvm_x86_ops->cache_regs(vcpu);
1611 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
1612 kvm_x86_ops->decache_regs(vcpu);
1613
1614 kvm_x86_ops->skip_emulated_instruction(vcpu);
1615
1616 pio_dev = vcpu_find_pio_dev(vcpu, port);
1617 if (pio_dev) {
1618 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1619 complete_pio(vcpu);
1620 return 1;
1621 }
1622 return 0;
1623}
1624EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1625
1626int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1627 int size, unsigned long count, int down,
1628 gva_t address, int rep, unsigned port)
1629{
1630 unsigned now, in_page;
1631 int i, ret = 0;
1632 int nr_pages = 1;
1633 struct page *page;
1634 struct kvm_io_device *pio_dev;
1635
1636 vcpu->run->exit_reason = KVM_EXIT_IO;
1637 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1638 vcpu->run->io.size = vcpu->pio.size = size;
1639 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1640 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1641 vcpu->run->io.port = vcpu->pio.port = port;
1642 vcpu->pio.in = in;
1643 vcpu->pio.string = 1;
1644 vcpu->pio.down = down;
1645 vcpu->pio.guest_page_offset = offset_in_page(address);
1646 vcpu->pio.rep = rep;
1647
1648 if (!count) {
1649 kvm_x86_ops->skip_emulated_instruction(vcpu);
1650 return 1;
1651 }
1652
1653 if (!down)
1654 in_page = PAGE_SIZE - offset_in_page(address);
1655 else
1656 in_page = offset_in_page(address) + size;
1657 now = min(count, (unsigned long)in_page / size);
1658 if (!now) {
1659 /*
1660 * String I/O straddles page boundary. Pin two guest pages
1661 * so that we satisfy atomicity constraints. Do just one
1662 * transaction to avoid complexity.
1663 */
1664 nr_pages = 2;
1665 now = 1;
1666 }
1667 if (down) {
1668 /*
1669 * String I/O in reverse. Yuck. Kill the guest, fix later.
1670 */
1671 pr_unimpl(vcpu, "guest string pio down\n");
1672 inject_gp(vcpu);
1673 return 1;
1674 }
1675 vcpu->run->io.count = now;
1676 vcpu->pio.cur_count = now;
1677
1678 if (vcpu->pio.cur_count == vcpu->pio.count)
1679 kvm_x86_ops->skip_emulated_instruction(vcpu);
1680
1681 for (i = 0; i < nr_pages; ++i) {
1682 mutex_lock(&vcpu->kvm->lock);
1683 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1684 vcpu->pio.guest_pages[i] = page;
1685 mutex_unlock(&vcpu->kvm->lock);
1686 if (!page) {
1687 inject_gp(vcpu);
1688 free_pio_guest_pages(vcpu);
1689 return 1;
1690 }
1691 }
1692
1693 pio_dev = vcpu_find_pio_dev(vcpu, port);
1694 if (!vcpu->pio.in) {
1695 /* string PIO write */
1696 ret = pio_copy_data(vcpu);
1697 if (ret >= 0 && pio_dev) {
1698 pio_string_write(pio_dev, vcpu);
1699 complete_pio(vcpu);
1700 if (vcpu->pio.count == 0)
1701 ret = 1;
1702 }
1703 } else if (pio_dev)
1704 pr_unimpl(vcpu, "no string pio read support yet, "
1705 "port %x size %d count %ld\n",
1706 port, size, count);
1707
1708 return ret;
1709}
1710EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
1711
f8c16bba 1712int kvm_arch_init(void *opaque)
043405e1 1713{
f8c16bba
ZX		 1714 struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque;
1715
043405e1 1716 kvm_init_msr_list();
f8c16bba
ZX		 1717
1718 if (kvm_x86_ops) {
1719 printk(KERN_ERR "kvm: already loaded the other module\n");
1720 return -EEXIST;
1721 }
1722
1723 if (!ops->cpu_has_kvm_support()) {
1724 printk(KERN_ERR "kvm: no hardware support\n");
1725 return -EOPNOTSUPP;
1726 }
1727 if (ops->disabled_by_bios()) {
1728 printk(KERN_ERR "kvm: disabled by bios\n");
1729 return -EOPNOTSUPP;
1730 }
1731
1732 kvm_x86_ops = ops;
1733
1734 return 0;
043405e1 1735}
8776e519 1736
f8c16bba
ZX		 1737void kvm_arch_exit(void)
1738{
1739 kvm_x86_ops = NULL;
1740 }
1741
8776e519
HB		 1742int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1743{
1744 ++vcpu->stat.halt_exits;
1745 if (irqchip_in_kernel(vcpu->kvm)) {
1746 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1747 kvm_vcpu_block(vcpu);
1748 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1749 return -EINTR;
1750 return 1;
1751 } else {
1752 vcpu->run->exit_reason = KVM_EXIT_HLT;
1753 return 0;
1754 }
1755}
1756EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1757
1758int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
1759{
1760 unsigned long nr, a0, a1, a2, a3, ret;
1761
1762 kvm_x86_ops->cache_regs(vcpu);
1763
1764 nr = vcpu->regs[VCPU_REGS_RAX];
1765 a0 = vcpu->regs[VCPU_REGS_RBX];
1766 a1 = vcpu->regs[VCPU_REGS_RCX];
1767 a2 = vcpu->regs[VCPU_REGS_RDX];
1768 a3 = vcpu->regs[VCPU_REGS_RSI];
1769
1770 if (!is_long_mode(vcpu)) {
1771 nr &= 0xFFFFFFFF;
1772 a0 &= 0xFFFFFFFF;
1773 a1 &= 0xFFFFFFFF;
1774 a2 &= 0xFFFFFFFF;
1775 a3 &= 0xFFFFFFFF;
1776 }
1777
1778 switch (nr) {
1779 default:
1780 ret = -KVM_ENOSYS;
1781 break;
1782 }
1783 vcpu->regs[VCPU_REGS_RAX] = ret;
1784 kvm_x86_ops->decache_regs(vcpu);
1785 return 0;
1786}
1787EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1788
1789int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1790{
1791 char instruction[3];
1792 int ret = 0;
1793
1794 mutex_lock(&vcpu->kvm->lock);
1795
1796 /*
1797 * Blow out the MMU to ensure that no other VCPU has an active mapping
1798 * to ensure that the updated hypercall appears atomically across all
1799 * VCPUs.
1800 */
1801 kvm_mmu_zap_all(vcpu->kvm);
1802
1803 kvm_x86_ops->cache_regs(vcpu);
1804 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1805 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1806 != X86EMUL_CONTINUE)
1807 ret = -EFAULT;
1808
1809 mutex_unlock(&vcpu->kvm->lock);
1810
1811 return ret;
1812}
1813
1814static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1815{
1816 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1817}
1818
1819void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1820{
1821 struct descriptor_table dt = { limit, base };
1822
1823 kvm_x86_ops->set_gdt(vcpu, &dt);
1824}
1825
1826void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1827{
1828 struct descriptor_table dt = { limit, base };
1829
1830 kvm_x86_ops->set_idt(vcpu, &dt);
1831}
1832
1833void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1834 unsigned long *rflags)
1835{
1836 lmsw(vcpu, msw);
1837 *rflags = kvm_x86_ops->get_rflags(vcpu);
1838}
1839
1840unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1841{
1842 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
1843 switch (cr) {
1844 case 0:
1845 return vcpu->cr0;
1846 case 2:
1847 return vcpu->cr2;
1848 case 3:
1849 return vcpu->cr3;
1850 case 4:
1851 return vcpu->cr4;
1852 default:
1853 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1854 return 0;
1855 }
1856}
1857
1858void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1859 unsigned long *rflags)
1860{
1861 switch (cr) {
1862 case 0:
1863 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
1864 *rflags = kvm_x86_ops->get_rflags(vcpu);
1865 break;
1866 case 2:
1867 vcpu->cr2 = val;
1868 break;
1869 case 3:
1870 set_cr3(vcpu, val);
1871 break;
1872 case 4:
1873 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1874 break;
1875 default:
1876 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1877 }
1878}
1879
1880void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1881{
1882 int i;
1883 u32 function;
1884 struct kvm_cpuid_entry *e, *best;
1885
1886 kvm_x86_ops->cache_regs(vcpu);
1887 function = vcpu->regs[VCPU_REGS_RAX];
1888 vcpu->regs[VCPU_REGS_RAX] = 0;
1889 vcpu->regs[VCPU_REGS_RBX] = 0;
1890 vcpu->regs[VCPU_REGS_RCX] = 0;
1891 vcpu->regs[VCPU_REGS_RDX] = 0;
1892 best = NULL;
1893 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1894 e = &vcpu->cpuid_entries[i];
1895 if (e->function == function) {
1896 best = e;
1897 break;
1898 }
1899 /*
1900 * Both basic or both extended?
1901 */
1902 if (((e->function ^ function) & 0x80000000) == 0)
1903 if (!best || e->function > best->function)
1904 best = e;
1905 }
1906 if (best) {
1907 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1908 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1909 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1910 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1911 }
1912 kvm_x86_ops->decache_regs(vcpu);
1913 kvm_x86_ops->skip_emulated_instruction(vcpu);
1914}
1915EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
d0752060 1916
b6c7a5dc
HB		 1917/*
1918 * Check if userspace requested an interrupt window, and that the
1919 * interrupt window is open.
1920 *
1921 * No need to exit to userspace if we already have an interrupt queued.
1922 */
1923static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1924 struct kvm_run *kvm_run)
1925{
1926 return (!vcpu->irq_summary &&
1927 kvm_run->request_interrupt_window &&
1928 vcpu->interrupt_window_open &&
1929 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
1930}
1931
1932static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1933 struct kvm_run *kvm_run)
1934{
1935 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
1936 kvm_run->cr8 = get_cr8(vcpu);
1937 kvm_run->apic_base = kvm_get_apic_base(vcpu);
1938 if (irqchip_in_kernel(vcpu->kvm))
1939 kvm_run->ready_for_interrupt_injection = 1;
1940 else
1941 kvm_run->ready_for_interrupt_injection =
1942 (vcpu->interrupt_window_open &&
1943 vcpu->irq_summary == 0);
1944}
1945
1946static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1947{
1948 int r;
1949
1950 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
1951 pr_debug("vcpu %d received sipi with vector # %x\n",
1952 vcpu->vcpu_id, vcpu->sipi_vector);
1953 kvm_lapic_reset(vcpu);
1954 r = kvm_x86_ops->vcpu_reset(vcpu);
1955 if (r)
1956 return r;
1957 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
1958 }
1959
1960preempted:
1961 if (vcpu->guest_debug.enabled)
1962 kvm_x86_ops->guest_debug_pre(vcpu);
1963
1964again:
1965 r = kvm_mmu_reload(vcpu);
1966 if (unlikely(r))
1967 goto out;
1968
1969 kvm_inject_pending_timer_irqs(vcpu);
1970
1971 preempt_disable();
1972
1973 kvm_x86_ops->prepare_guest_switch(vcpu);
1974 kvm_load_guest_fpu(vcpu);
1975
1976 local_irq_disable();
1977
1978 if (signal_pending(current)) {
1979 local_irq_enable();
1980 preempt_enable();
1981 r = -EINTR;
1982 kvm_run->exit_reason = KVM_EXIT_INTR;
1983 ++vcpu->stat.signal_exits;
1984 goto out;
1985 }
1986
1987 if (irqchip_in_kernel(vcpu->kvm))
1988 kvm_x86_ops->inject_pending_irq(vcpu);
1989 else if (!vcpu->mmio_read_completed)
1990 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
1991
1992 vcpu->guest_mode = 1;
1993 kvm_guest_enter();
1994
1995 if (vcpu->requests)
1996 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
1997 kvm_x86_ops->tlb_flush(vcpu);
1998
1999 kvm_x86_ops->run(vcpu, kvm_run);
2000
2001 vcpu->guest_mode = 0;
2002 local_irq_enable();
2003
2004 ++vcpu->stat.exits;
2005
2006 /*
2007 * We must have an instruction between local_irq_enable() and
2008 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2009 * the interrupt shadow. The stat.exits increment will do nicely.
2010 * But we need to prevent reordering, hence this barrier():
2011 */
2012 barrier();
2013
2014 kvm_guest_exit();
2015
2016 preempt_enable();
2017
2018 /*
2019 * Profile KVM exit RIPs:
2020 */
2021 if (unlikely(prof_on == KVM_PROFILING)) {
2022 kvm_x86_ops->cache_regs(vcpu);
2023 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2024 }
2025
2026 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2027
2028 if (r > 0) {
2029 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2030 r = -EINTR;
2031 kvm_run->exit_reason = KVM_EXIT_INTR;
2032 ++vcpu->stat.request_irq_exits;
2033 goto out;
2034 }
e1beb1d3 2035 if (!need_resched())
b6c7a5dc 2036 goto again;
b6c7a5dc
HB		 2037 }
2038
2039out:
2040 if (r > 0) {
2041 kvm_resched(vcpu);
2042 goto preempted;
2043 }
2044
2045 post_kvm_run_save(vcpu, kvm_run);
2046
2047 return r;
2048}
2049
2050int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2051{
2052 int r;
2053 sigset_t sigsaved;
2054
2055 vcpu_load(vcpu);
2056
2057 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2058 kvm_vcpu_block(vcpu);
2059 vcpu_put(vcpu);
2060 return -EAGAIN;
2061 }
2062
2063 if (vcpu->sigset_active)
2064 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2065
2066 /* re-sync apic's tpr */
2067 if (!irqchip_in_kernel(vcpu->kvm))
2068 set_cr8(vcpu, kvm_run->cr8);
2069
2070 if (vcpu->pio.cur_count) {
2071 r = complete_pio(vcpu);
2072 if (r)
2073 goto out;
2074 }
2075#if CONFIG_HAS_IOMEM
2076 if (vcpu->mmio_needed) {
2077 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2078 vcpu->mmio_read_completed = 1;
2079 vcpu->mmio_needed = 0;
2080 r = emulate_instruction(vcpu, kvm_run,
2081 vcpu->mmio_fault_cr2, 0, 1);
2082 if (r == EMULATE_DO_MMIO) {
2083 /*
2084 * Read-modify-write. Back to userspace.
2085 */
2086 r = 0;
2087 goto out;
2088 }
2089 }
2090#endif
2091 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
2092 kvm_x86_ops->cache_regs(vcpu);
2093 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2094 kvm_x86_ops->decache_regs(vcpu);
2095 }
2096
2097 r = __vcpu_run(vcpu, kvm_run);
2098
2099out:
2100 if (vcpu->sigset_active)
2101 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2102
2103 vcpu_put(vcpu);
2104 return r;
2105}
2106
2107int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2108{
2109 vcpu_load(vcpu);
2110
2111 kvm_x86_ops->cache_regs(vcpu);
2112
2113 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2114 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2115 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2116 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2117 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2118 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2119 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2120 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
2121#ifdef CONFIG_X86_64
2122 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2123 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2124 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2125 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2126 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2127 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2128 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2129 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2130#endif
2131
2132 regs->rip = vcpu->rip;
2133 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
2134
2135 /*
2136 * Don't leak debug flags in case they were set for guest debugging
2137 */
2138 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2139 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2140
2141 vcpu_put(vcpu);
2142
2143 return 0;
2144}
2145
2146int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
2147{
2148 vcpu_load(vcpu);
2149
2150 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2151 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2152 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2153 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2154 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2155 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2156 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2157 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
2158#ifdef CONFIG_X86_64
2159 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2160 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2161 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2162 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2163 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2164 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2165 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2166 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2167#endif
2168
2169 vcpu->rip = regs->rip;
2170 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
2171
2172 kvm_x86_ops->decache_regs(vcpu);
2173
2174 vcpu_put(vcpu);
2175
2176 return 0;
2177}
2178
2179static void get_segment(struct kvm_vcpu *vcpu,
2180 struct kvm_segment *var, int seg)
2181{
2182 return kvm_x86_ops->get_segment(vcpu, var, seg);
2183}
2184
2185void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2186{
2187 struct kvm_segment cs;
2188
2189 get_segment(vcpu, &cs, VCPU_SREG_CS);
2190 *db = cs.db;
2191 *l = cs.l;
2192}
2193EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2194
2195int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2196 struct kvm_sregs *sregs)
2197{
2198 struct descriptor_table dt;
2199 int pending_vec;
2200
2201 vcpu_load(vcpu);
2202
2203 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2204 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2205 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2206 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2207 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2208 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2209
2210 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2211 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2212
2213 kvm_x86_ops->get_idt(vcpu, &dt);
2214 sregs->idt.limit = dt.limit;
2215 sregs->idt.base = dt.base;
2216 kvm_x86_ops->get_gdt(vcpu, &dt);
2217 sregs->gdt.limit = dt.limit;
2218 sregs->gdt.base = dt.base;
2219
2220 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2221 sregs->cr0 = vcpu->cr0;
2222 sregs->cr2 = vcpu->cr2;
2223 sregs->cr3 = vcpu->cr3;
2224 sregs->cr4 = vcpu->cr4;
2225 sregs->cr8 = get_cr8(vcpu);
2226 sregs->efer = vcpu->shadow_efer;
2227 sregs->apic_base = kvm_get_apic_base(vcpu);
2228
2229 if (irqchip_in_kernel(vcpu->kvm)) {
2230 memset(sregs->interrupt_bitmap, 0,
2231 sizeof sregs->interrupt_bitmap);
2232 pending_vec = kvm_x86_ops->get_irq(vcpu);
2233 if (pending_vec >= 0)
2234 set_bit(pending_vec,
2235 (unsigned long *)sregs->interrupt_bitmap);
2236 } else
2237 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2238 sizeof sregs->interrupt_bitmap);
2239
2240 vcpu_put(vcpu);
2241
2242 return 0;
2243}
2244
2245static void set_segment(struct kvm_vcpu *vcpu,
2246 struct kvm_segment *var, int seg)
2247{
2248 return kvm_x86_ops->set_segment(vcpu, var, seg);
2249}
2250
2251int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2252 struct kvm_sregs *sregs)
2253{
2254 int mmu_reset_needed = 0;
2255 int i, pending_vec, max_bits;
2256 struct descriptor_table dt;
2257
2258 vcpu_load(vcpu);
2259
2260 dt.limit = sregs->idt.limit;
2261 dt.base = sregs->idt.base;
2262 kvm_x86_ops->set_idt(vcpu, &dt);
2263 dt.limit = sregs->gdt.limit;
2264 dt.base = sregs->gdt.base;
2265 kvm_x86_ops->set_gdt(vcpu, &dt);
2266
2267 vcpu->cr2 = sregs->cr2;
2268 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2269 vcpu->cr3 = sregs->cr3;
2270
2271 set_cr8(vcpu, sregs->cr8);
2272
2273 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
2274#ifdef CONFIG_X86_64
2275 kvm_x86_ops->set_efer(vcpu, sregs->efer);
2276#endif
2277 kvm_set_apic_base(vcpu, sregs->apic_base);
2278
2279 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
2280
2281 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
2282 vcpu->cr0 = sregs->cr0;
2283 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
2284
2285 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
2286 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
2287 if (!is_long_mode(vcpu) && is_pae(vcpu))
2288 load_pdptrs(vcpu, vcpu->cr3);
2289
2290 if (mmu_reset_needed)
2291 kvm_mmu_reset_context(vcpu);
2292
2293 if (!irqchip_in_kernel(vcpu->kvm)) {
2294 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2295 sizeof vcpu->irq_pending);
2296 vcpu->irq_summary = 0;
2297 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2298 if (vcpu->irq_pending[i])
2299 __set_bit(i, &vcpu->irq_summary);
2300 } else {
2301 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2302 pending_vec = find_first_bit(
2303 (const unsigned long *)sregs->interrupt_bitmap,
2304 max_bits);
2305 /* Only pending external irq is handled here */
2306 if (pending_vec < max_bits) {
2307 kvm_x86_ops->set_irq(vcpu, pending_vec);
2308 pr_debug("Set back pending irq %d\n",
2309 pending_vec);
2310 }
2311 }
2312
2313 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2314 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2315 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2316 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2317 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2318 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2319
2320 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2321 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2322
2323 vcpu_put(vcpu);
2324
2325 return 0;
2326}
2327
2328int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2329 struct kvm_debug_guest *dbg)
2330{
2331 int r;
2332
2333 vcpu_load(vcpu);
2334
2335 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
2336
2337 vcpu_put(vcpu);
2338
2339 return r;
2340}
2341
d0752060
HB		 2342/*
2343 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2344 * we have asm/x86/processor.h
2345 */
2346struct fxsave {
2347 u16 cwd;
2348 u16 swd;
2349 u16 twd;
2350 u16 fop;
2351 u64 rip;
2352 u64 rdp;
2353 u32 mxcsr;
2354 u32 mxcsr_mask;
2355 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2356#ifdef CONFIG_X86_64
2357 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2358#else
2359 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2360#endif
2361};
2362
8b006791
ZX		 2363/*
2364 * Translate a guest virtual address to a guest physical address.
2365 */
2366int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2367 struct kvm_translation *tr)
2368{
2369 unsigned long vaddr = tr->linear_address;
2370 gpa_t gpa;
2371
2372 vcpu_load(vcpu);
2373 mutex_lock(&vcpu->kvm->lock);
2374 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2375 tr->physical_address = gpa;
2376 tr->valid = gpa != UNMAPPED_GVA;
2377 tr->writeable = 1;
2378 tr->usermode = 0;
2379 mutex_unlock(&vcpu->kvm->lock);
2380 vcpu_put(vcpu);
2381
2382 return 0;
2383}
2384
d0752060
HB		 2385int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2386{
2387 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2388
2389 vcpu_load(vcpu);
2390
2391 memcpy(fpu->fpr, fxsave->st_space, 128);
2392 fpu->fcw = fxsave->cwd;
2393 fpu->fsw = fxsave->swd;
2394 fpu->ftwx = fxsave->twd;
2395 fpu->last_opcode = fxsave->fop;
2396 fpu->last_ip = fxsave->rip;
2397 fpu->last_dp = fxsave->rdp;
2398 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2399
2400 vcpu_put(vcpu);
2401
2402 return 0;
2403}
2404
2405int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2406{
2407 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
2408
2409 vcpu_load(vcpu);
2410
2411 memcpy(fxsave->st_space, fpu->fpr, 128);
2412 fxsave->cwd = fpu->fcw;
2413 fxsave->swd = fpu->fsw;
2414 fxsave->twd = fpu->ftwx;
2415 fxsave->fop = fpu->last_opcode;
2416 fxsave->rip = fpu->last_ip;
2417 fxsave->rdp = fpu->last_dp;
2418 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2419
2420 vcpu_put(vcpu);
2421
2422 return 0;
2423}
2424
2425void fx_init(struct kvm_vcpu *vcpu)
2426{
2427 unsigned after_mxcsr_mask;
2428
2429 /* Initialize guest FPU by resetting ours and saving into guest's */
2430 preempt_disable();
2431 fx_save(&vcpu->host_fx_image);
2432 fpu_init();
2433 fx_save(&vcpu->guest_fx_image);
2434 fx_restore(&vcpu->host_fx_image);
2435 preempt_enable();
2436
2437 vcpu->cr0 |= X86_CR0_ET;
2438 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
2439 vcpu->guest_fx_image.mxcsr = 0x1f80;
2440 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
2441 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
2442}
2443EXPORT_SYMBOL_GPL(fx_init);
2444
2445void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
2446{
2447 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
2448 return;
2449
2450 vcpu->guest_fpu_loaded = 1;
2451 fx_save(&vcpu->host_fx_image);
2452 fx_restore(&vcpu->guest_fx_image);
2453}
2454EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
2455
2456void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
2457{
2458 if (!vcpu->guest_fpu_loaded)
2459 return;
2460
2461 vcpu->guest_fpu_loaded = 0;
2462 fx_save(&vcpu->guest_fx_image);
2463 fx_restore(&vcpu->host_fx_image);
f096ed85 2464 ++vcpu->stat.fpu_reload;
d0752060
HB		 2465}
2466EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
e9b11c17
ZX		 2467
2468void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
2469{
2470 kvm_x86_ops->vcpu_free(vcpu);
2471}
2472
2473struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
2474 unsigned int id)
2475{
2476 int r;
2477 struct kvm_vcpu *vcpu = kvm_x86_ops->vcpu_create(kvm, id);
2478
2479 if (IS_ERR(vcpu)) {
2480 r = -ENOMEM;
2481 goto fail;
2482 }
2483
2484 /* We do fxsave: this must be aligned. */
2485 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2486
2487 vcpu_load(vcpu);
2488 r = kvm_arch_vcpu_reset(vcpu);
2489 if (r == 0)
2490 r = kvm_mmu_setup(vcpu);
2491 vcpu_put(vcpu);
2492 if (r < 0)
2493 goto free_vcpu;
2494
2495 return vcpu;
2496free_vcpu:
2497 kvm_x86_ops->vcpu_free(vcpu);
2498fail:
2499 return ERR_PTR(r);
2500}
2501
2502void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu)
2503{
2504 vcpu_load(vcpu);
2505 kvm_mmu_unload(vcpu);
2506 vcpu_put(vcpu);
2507
2508 kvm_x86_ops->vcpu_free(vcpu);
2509}
2510
2511int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu)
2512{
2513 return kvm_x86_ops->vcpu_reset(vcpu);
2514}
2515
2516void kvm_arch_hardware_enable(void *garbage)
2517{
2518 kvm_x86_ops->hardware_enable(garbage);
2519}
2520
2521void kvm_arch_hardware_disable(void *garbage)
2522{
2523 kvm_x86_ops->hardware_disable(garbage);
2524}
2525
2526int kvm_arch_hardware_setup(void)
2527{
2528 return kvm_x86_ops->hardware_setup();
2529}
2530
2531void kvm_arch_hardware_unsetup(void)
2532{
2533 kvm_x86_ops->hardware_unsetup();
2534}
2535
2536void kvm_arch_check_processor_compat(void *rtn)
2537{
2538 kvm_x86_ops->check_processor_compatibility(rtn);
2539}
2540
2541int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
2542{
2543 struct page *page;
2544 struct kvm *kvm;
2545 int r;
2546
2547 BUG_ON(vcpu->kvm == NULL);
2548 kvm = vcpu->kvm;
2549
2550 vcpu->mmu.root_hpa = INVALID_PAGE;
2551 if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0)
2552 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
2553 else
2554 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
2555
2556 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
2557 if (!page) {
2558 r = -ENOMEM;
2559 goto fail;
2560 }
2561 vcpu->pio_data = page_address(page);
2562
2563 r = kvm_mmu_create(vcpu);
2564 if (r < 0)
2565 goto fail_free_pio_data;
2566
2567 if (irqchip_in_kernel(kvm)) {
2568 r = kvm_create_lapic(vcpu);
2569 if (r < 0)
2570 goto fail_mmu_destroy;
2571 }
2572
2573 return 0;
2574
2575fail_mmu_destroy:
2576 kvm_mmu_destroy(vcpu);
2577fail_free_pio_data:
2578 free_page((unsigned long)vcpu->pio_data);
2579fail:
2580 return r;
2581}
2582
2583void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
2584{
2585 kvm_free_lapic(vcpu);
2586 kvm_mmu_destroy(vcpu);
2587 free_page((unsigned long)vcpu->pio_data);
2588}
d19a9cd2
ZX		 2589
2590struct kvm *kvm_arch_create_vm(void)
2591{
2592 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
2593
2594 if (!kvm)
2595 return ERR_PTR(-ENOMEM);
2596
2597 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2598
2599 return kvm;
2600}
2601
2602static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
2603{
2604 vcpu_load(vcpu);
2605 kvm_mmu_unload(vcpu);
2606 vcpu_put(vcpu);
2607}
2608
2609static void kvm_free_vcpus(struct kvm *kvm)
2610{
2611 unsigned int i;
2612
2613 /*
2614 * Unpin any mmu pages first.
2615 */
2616 for (i = 0; i < KVM_MAX_VCPUS; ++i)
2617 if (kvm->vcpus[i])
2618 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
2619 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
2620 if (kvm->vcpus[i]) {
2621 kvm_arch_vcpu_free(kvm->vcpus[i]);
2622 kvm->vcpus[i] = NULL;
2623 }
2624 }
2625
2626}
2627
2628void kvm_arch_destroy_vm(struct kvm *kvm)
2629{
2630 kfree(kvm->vpic);
2631 kfree(kvm->vioapic);
2632 kvm_free_vcpus(kvm);
2633 kvm_free_physmem(kvm);
2634 kfree(kvm);
2635}
Linux 6.x block layer and io_uring tree(s)