Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * Yaniv Kamay <yaniv@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "kvm.h" | |
19 | ||
20 | #include <linux/kvm.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/errno.h> | |
e9cdb1e3 | 23 | #include <linux/magic.h> |
6aa8b732 AK |
24 | #include <asm/processor.h> |
25 | #include <linux/percpu.h> | |
26 | #include <linux/gfp.h> | |
27 | #include <asm/msr.h> | |
28 | #include <linux/mm.h> | |
29 | #include <linux/miscdevice.h> | |
30 | #include <linux/vmalloc.h> | |
31 | #include <asm/uaccess.h> | |
32 | #include <linux/reboot.h> | |
33 | #include <asm/io.h> | |
34 | #include <linux/debugfs.h> | |
35 | #include <linux/highmem.h> | |
36 | #include <linux/file.h> | |
37 | #include <asm/desc.h> | |
59ae6c6b | 38 | #include <linux/sysdev.h> |
774c47f1 | 39 | #include <linux/cpu.h> |
f17abe9a | 40 | #include <linux/file.h> |
37e29d90 AK |
41 | #include <linux/fs.h> |
42 | #include <linux/mount.h> | |
6aa8b732 AK |
43 | |
44 | #include "x86_emulate.h" | |
45 | #include "segment_descriptor.h" | |
46 | ||
47 | MODULE_AUTHOR("Qumranet"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
133de902 AK |
50 | static DEFINE_SPINLOCK(kvm_lock); |
51 | static LIST_HEAD(vm_list); | |
52 | ||
6aa8b732 AK |
53 | struct kvm_arch_ops *kvm_arch_ops; |
54 | struct kvm_stat kvm_stat; | |
55 | EXPORT_SYMBOL_GPL(kvm_stat); | |
56 | ||
57 | static struct kvm_stats_debugfs_item { | |
58 | const char *name; | |
59 | u32 *data; | |
60 | struct dentry *dentry; | |
61 | } debugfs_entries[] = { | |
62 | { "pf_fixed", &kvm_stat.pf_fixed }, | |
63 | { "pf_guest", &kvm_stat.pf_guest }, | |
64 | { "tlb_flush", &kvm_stat.tlb_flush }, | |
65 | { "invlpg", &kvm_stat.invlpg }, | |
66 | { "exits", &kvm_stat.exits }, | |
67 | { "io_exits", &kvm_stat.io_exits }, | |
68 | { "mmio_exits", &kvm_stat.mmio_exits }, | |
69 | { "signal_exits", &kvm_stat.signal_exits }, | |
c1150d8c DL |
70 | { "irq_window", &kvm_stat.irq_window_exits }, |
71 | { "halt_exits", &kvm_stat.halt_exits }, | |
72 | { "request_irq", &kvm_stat.request_irq_exits }, | |
6aa8b732 | 73 | { "irq_exits", &kvm_stat.irq_exits }, |
8b6d44c7 | 74 | { NULL, NULL } |
6aa8b732 AK |
75 | }; |
76 | ||
77 | static struct dentry *debugfs_dir; | |
78 | ||
37e29d90 AK |
79 | struct vfsmount *kvmfs_mnt; |
80 | ||
6aa8b732 AK |
81 | #define MAX_IO_MSRS 256 |
82 | ||
83 | #define CR0_RESEVED_BITS 0xffffffff1ffaffc0ULL | |
84 | #define LMSW_GUEST_MASK 0x0eULL | |
85 | #define CR4_RESEVED_BITS (~((1ULL << 11) - 1)) | |
86 | #define CR8_RESEVED_BITS (~0x0fULL) | |
87 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe | |
88 | ||
05b3e0c2 | 89 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
90 | // LDT or TSS descriptor in the GDT. 16 bytes. |
91 | struct segment_descriptor_64 { | |
92 | struct segment_descriptor s; | |
93 | u32 base_higher; | |
94 | u32 pad_zero; | |
95 | }; | |
96 | ||
97 | #endif | |
98 | ||
bccf2150 AK |
99 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
100 | unsigned long arg); | |
101 | ||
f17abe9a AK |
102 | static struct inode *kvmfs_inode(struct file_operations *fops) |
103 | { | |
104 | int error = -ENOMEM; | |
105 | struct inode *inode = new_inode(kvmfs_mnt->mnt_sb); | |
106 | ||
107 | if (!inode) | |
108 | goto eexit_1; | |
109 | ||
110 | inode->i_fop = fops; | |
111 | ||
112 | /* | |
113 | * Mark the inode dirty from the very beginning, | |
114 | * that way it will never be moved to the dirty | |
115 | * list because mark_inode_dirty() will think | |
116 | * that it already _is_ on the dirty list. | |
117 | */ | |
118 | inode->i_state = I_DIRTY; | |
119 | inode->i_mode = S_IRUSR | S_IWUSR; | |
120 | inode->i_uid = current->fsuid; | |
121 | inode->i_gid = current->fsgid; | |
122 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
123 | return inode; | |
124 | ||
125 | eexit_1: | |
126 | return ERR_PTR(error); | |
127 | } | |
128 | ||
129 | static struct file *kvmfs_file(struct inode *inode, void *private_data) | |
130 | { | |
131 | struct file *file = get_empty_filp(); | |
132 | ||
133 | if (!file) | |
134 | return ERR_PTR(-ENFILE); | |
135 | ||
136 | file->f_path.mnt = mntget(kvmfs_mnt); | |
137 | file->f_path.dentry = d_alloc_anon(inode); | |
138 | if (!file->f_path.dentry) | |
139 | return ERR_PTR(-ENOMEM); | |
140 | file->f_mapping = inode->i_mapping; | |
141 | ||
142 | file->f_pos = 0; | |
143 | file->f_flags = O_RDWR; | |
144 | file->f_op = inode->i_fop; | |
145 | file->f_mode = FMODE_READ | FMODE_WRITE; | |
146 | file->f_version = 0; | |
147 | file->private_data = private_data; | |
148 | return file; | |
149 | } | |
150 | ||
6aa8b732 AK |
151 | unsigned long segment_base(u16 selector) |
152 | { | |
153 | struct descriptor_table gdt; | |
154 | struct segment_descriptor *d; | |
155 | unsigned long table_base; | |
156 | typedef unsigned long ul; | |
157 | unsigned long v; | |
158 | ||
159 | if (selector == 0) | |
160 | return 0; | |
161 | ||
162 | asm ("sgdt %0" : "=m"(gdt)); | |
163 | table_base = gdt.base; | |
164 | ||
165 | if (selector & 4) { /* from ldt */ | |
166 | u16 ldt_selector; | |
167 | ||
168 | asm ("sldt %0" : "=g"(ldt_selector)); | |
169 | table_base = segment_base(ldt_selector); | |
170 | } | |
171 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
172 | v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24); | |
05b3e0c2 | 173 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
174 | if (d->system == 0 |
175 | && (d->type == 2 || d->type == 9 || d->type == 11)) | |
176 | v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
177 | #endif | |
178 | return v; | |
179 | } | |
180 | EXPORT_SYMBOL_GPL(segment_base); | |
181 | ||
5aacf0ca JM |
182 | static inline int valid_vcpu(int n) |
183 | { | |
184 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
185 | } | |
186 | ||
d27d4aca AK |
187 | int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
188 | void *dest) | |
6aa8b732 AK |
189 | { |
190 | unsigned char *host_buf = dest; | |
191 | unsigned long req_size = size; | |
192 | ||
193 | while (size) { | |
194 | hpa_t paddr; | |
195 | unsigned now; | |
196 | unsigned offset; | |
197 | hva_t guest_buf; | |
198 | ||
199 | paddr = gva_to_hpa(vcpu, addr); | |
200 | ||
201 | if (is_error_hpa(paddr)) | |
202 | break; | |
203 | ||
204 | guest_buf = (hva_t)kmap_atomic( | |
205 | pfn_to_page(paddr >> PAGE_SHIFT), | |
206 | KM_USER0); | |
207 | offset = addr & ~PAGE_MASK; | |
208 | guest_buf |= offset; | |
209 | now = min(size, PAGE_SIZE - offset); | |
210 | memcpy(host_buf, (void*)guest_buf, now); | |
211 | host_buf += now; | |
212 | addr += now; | |
213 | size -= now; | |
214 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
215 | } | |
216 | return req_size - size; | |
217 | } | |
218 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
219 | ||
d27d4aca AK |
220 | int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
221 | void *data) | |
6aa8b732 AK |
222 | { |
223 | unsigned char *host_buf = data; | |
224 | unsigned long req_size = size; | |
225 | ||
226 | while (size) { | |
227 | hpa_t paddr; | |
228 | unsigned now; | |
229 | unsigned offset; | |
230 | hva_t guest_buf; | |
ab51a434 | 231 | gfn_t gfn; |
6aa8b732 AK |
232 | |
233 | paddr = gva_to_hpa(vcpu, addr); | |
234 | ||
235 | if (is_error_hpa(paddr)) | |
236 | break; | |
237 | ||
ab51a434 UL |
238 | gfn = vcpu->mmu.gva_to_gpa(vcpu, addr) >> PAGE_SHIFT; |
239 | mark_page_dirty(vcpu->kvm, gfn); | |
6aa8b732 AK |
240 | guest_buf = (hva_t)kmap_atomic( |
241 | pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0); | |
242 | offset = addr & ~PAGE_MASK; | |
243 | guest_buf |= offset; | |
244 | now = min(size, PAGE_SIZE - offset); | |
245 | memcpy((void*)guest_buf, host_buf, now); | |
246 | host_buf += now; | |
247 | addr += now; | |
248 | size -= now; | |
249 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
250 | } | |
251 | return req_size - size; | |
252 | } | |
253 | EXPORT_SYMBOL_GPL(kvm_write_guest); | |
254 | ||
bccf2150 AK |
255 | /* |
256 | * Switches to specified vcpu, until a matching vcpu_put() | |
257 | */ | |
258 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 259 | { |
bccf2150 AK |
260 | mutex_lock(&vcpu->mutex); |
261 | kvm_arch_ops->vcpu_load(vcpu); | |
6aa8b732 AK |
262 | } |
263 | ||
264 | /* | |
bccf2150 AK |
265 | * Switches to specified vcpu, until a matching vcpu_put(). Will return NULL |
266 | * if the slot is not populated. | |
6aa8b732 | 267 | */ |
bccf2150 | 268 | static struct kvm_vcpu *vcpu_load_slot(struct kvm *kvm, int slot) |
6aa8b732 | 269 | { |
bccf2150 | 270 | struct kvm_vcpu *vcpu = &kvm->vcpus[slot]; |
6aa8b732 AK |
271 | |
272 | mutex_lock(&vcpu->mutex); | |
bccf2150 | 273 | if (!vcpu->vmcs) { |
6aa8b732 | 274 | mutex_unlock(&vcpu->mutex); |
8b6d44c7 | 275 | return NULL; |
6aa8b732 | 276 | } |
bccf2150 AK |
277 | kvm_arch_ops->vcpu_load(vcpu); |
278 | return vcpu; | |
6aa8b732 AK |
279 | } |
280 | ||
281 | static void vcpu_put(struct kvm_vcpu *vcpu) | |
282 | { | |
283 | kvm_arch_ops->vcpu_put(vcpu); | |
6aa8b732 AK |
284 | mutex_unlock(&vcpu->mutex); |
285 | } | |
286 | ||
f17abe9a | 287 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
288 | { |
289 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
290 | int i; | |
291 | ||
292 | if (!kvm) | |
f17abe9a | 293 | return ERR_PTR(-ENOMEM); |
6aa8b732 AK |
294 | |
295 | spin_lock_init(&kvm->lock); | |
296 | INIT_LIST_HEAD(&kvm->active_mmu_pages); | |
297 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
298 | struct kvm_vcpu *vcpu = &kvm->vcpus[i]; | |
299 | ||
300 | mutex_init(&vcpu->mutex); | |
133de902 | 301 | vcpu->cpu = -1; |
86a2b42e | 302 | vcpu->kvm = kvm; |
6aa8b732 AK |
303 | vcpu->mmu.root_hpa = INVALID_PAGE; |
304 | INIT_LIST_HEAD(&vcpu->free_pages); | |
133de902 AK |
305 | spin_lock(&kvm_lock); |
306 | list_add(&kvm->vm_list, &vm_list); | |
307 | spin_unlock(&kvm_lock); | |
6aa8b732 | 308 | } |
f17abe9a AK |
309 | return kvm; |
310 | } | |
311 | ||
312 | static int kvm_dev_open(struct inode *inode, struct file *filp) | |
313 | { | |
6aa8b732 AK |
314 | return 0; |
315 | } | |
316 | ||
317 | /* | |
318 | * Free any memory in @free but not in @dont. | |
319 | */ | |
320 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
321 | struct kvm_memory_slot *dont) | |
322 | { | |
323 | int i; | |
324 | ||
325 | if (!dont || free->phys_mem != dont->phys_mem) | |
326 | if (free->phys_mem) { | |
327 | for (i = 0; i < free->npages; ++i) | |
55a54f79 AK |
328 | if (free->phys_mem[i]) |
329 | __free_page(free->phys_mem[i]); | |
6aa8b732 AK |
330 | vfree(free->phys_mem); |
331 | } | |
332 | ||
333 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
334 | vfree(free->dirty_bitmap); | |
335 | ||
8b6d44c7 | 336 | free->phys_mem = NULL; |
6aa8b732 | 337 | free->npages = 0; |
8b6d44c7 | 338 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
339 | } |
340 | ||
341 | static void kvm_free_physmem(struct kvm *kvm) | |
342 | { | |
343 | int i; | |
344 | ||
345 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 346 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
347 | } |
348 | ||
039576c0 AK |
349 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
350 | { | |
351 | int i; | |
352 | ||
353 | for (i = 0; i < 2; ++i) | |
354 | if (vcpu->pio.guest_pages[i]) { | |
355 | __free_page(vcpu->pio.guest_pages[i]); | |
356 | vcpu->pio.guest_pages[i] = NULL; | |
357 | } | |
358 | } | |
359 | ||
6aa8b732 AK |
360 | static void kvm_free_vcpu(struct kvm_vcpu *vcpu) |
361 | { | |
bccf2150 | 362 | if (!vcpu->vmcs) |
1e8ba6fb IM |
363 | return; |
364 | ||
bccf2150 | 365 | vcpu_load(vcpu); |
6aa8b732 | 366 | kvm_mmu_destroy(vcpu); |
08438475 | 367 | vcpu_put(vcpu); |
9ede74e0 | 368 | kvm_arch_ops->vcpu_free(vcpu); |
9a2bb7f4 AK |
369 | free_page((unsigned long)vcpu->run); |
370 | vcpu->run = NULL; | |
039576c0 AK |
371 | free_page((unsigned long)vcpu->pio_data); |
372 | vcpu->pio_data = NULL; | |
373 | free_pio_guest_pages(vcpu); | |
6aa8b732 AK |
374 | } |
375 | ||
376 | static void kvm_free_vcpus(struct kvm *kvm) | |
377 | { | |
378 | unsigned int i; | |
379 | ||
380 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
381 | kvm_free_vcpu(&kvm->vcpus[i]); | |
382 | } | |
383 | ||
384 | static int kvm_dev_release(struct inode *inode, struct file *filp) | |
385 | { | |
f17abe9a AK |
386 | return 0; |
387 | } | |
6aa8b732 | 388 | |
f17abe9a AK |
389 | static void kvm_destroy_vm(struct kvm *kvm) |
390 | { | |
133de902 AK |
391 | spin_lock(&kvm_lock); |
392 | list_del(&kvm->vm_list); | |
393 | spin_unlock(&kvm_lock); | |
6aa8b732 AK |
394 | kvm_free_vcpus(kvm); |
395 | kvm_free_physmem(kvm); | |
396 | kfree(kvm); | |
f17abe9a AK |
397 | } |
398 | ||
399 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
400 | { | |
401 | struct kvm *kvm = filp->private_data; | |
402 | ||
403 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
404 | return 0; |
405 | } | |
406 | ||
407 | static void inject_gp(struct kvm_vcpu *vcpu) | |
408 | { | |
409 | kvm_arch_ops->inject_gp(vcpu, 0); | |
410 | } | |
411 | ||
1342d353 AK |
412 | /* |
413 | * Load the pae pdptrs. Return true is they are all valid. | |
414 | */ | |
415 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
416 | { |
417 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 418 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 AK |
419 | int i; |
420 | u64 pdpte; | |
421 | u64 *pdpt; | |
1342d353 | 422 | int ret; |
954bbbc2 | 423 | struct page *page; |
6aa8b732 AK |
424 | |
425 | spin_lock(&vcpu->kvm->lock); | |
954bbbc2 AK |
426 | page = gfn_to_page(vcpu->kvm, pdpt_gfn); |
427 | /* FIXME: !page - emulate? 0xff? */ | |
428 | pdpt = kmap_atomic(page, KM_USER0); | |
6aa8b732 | 429 | |
1342d353 | 430 | ret = 1; |
6aa8b732 AK |
431 | for (i = 0; i < 4; ++i) { |
432 | pdpte = pdpt[offset + i]; | |
1342d353 AK |
433 | if ((pdpte & 1) && (pdpte & 0xfffffff0000001e6ull)) { |
434 | ret = 0; | |
435 | goto out; | |
436 | } | |
6aa8b732 AK |
437 | } |
438 | ||
1342d353 AK |
439 | for (i = 0; i < 4; ++i) |
440 | vcpu->pdptrs[i] = pdpt[offset + i]; | |
441 | ||
442 | out: | |
6aa8b732 AK |
443 | kunmap_atomic(pdpt, KM_USER0); |
444 | spin_unlock(&vcpu->kvm->lock); | |
445 | ||
1342d353 | 446 | return ret; |
6aa8b732 AK |
447 | } |
448 | ||
449 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
450 | { | |
451 | if (cr0 & CR0_RESEVED_BITS) { | |
452 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
453 | cr0, vcpu->cr0); | |
454 | inject_gp(vcpu); | |
455 | return; | |
456 | } | |
457 | ||
458 | if ((cr0 & CR0_NW_MASK) && !(cr0 & CR0_CD_MASK)) { | |
459 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
460 | inject_gp(vcpu); | |
461 | return; | |
462 | } | |
463 | ||
464 | if ((cr0 & CR0_PG_MASK) && !(cr0 & CR0_PE_MASK)) { | |
465 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
466 | "and a clear PE flag\n"); | |
467 | inject_gp(vcpu); | |
468 | return; | |
469 | } | |
470 | ||
471 | if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) { | |
05b3e0c2 | 472 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
473 | if ((vcpu->shadow_efer & EFER_LME)) { |
474 | int cs_db, cs_l; | |
475 | ||
476 | if (!is_pae(vcpu)) { | |
477 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
478 | "in long mode while PAE is disabled\n"); | |
479 | inject_gp(vcpu); | |
480 | return; | |
481 | } | |
482 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
483 | if (cs_l) { | |
484 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
485 | "in long mode while CS.L == 1\n"); | |
486 | inject_gp(vcpu); | |
487 | return; | |
488 | ||
489 | } | |
490 | } else | |
491 | #endif | |
1342d353 | 492 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
493 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
494 | "reserved bits\n"); | |
495 | inject_gp(vcpu); | |
496 | return; | |
497 | } | |
498 | ||
499 | } | |
500 | ||
501 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
502 | vcpu->cr0 = cr0; | |
503 | ||
504 | spin_lock(&vcpu->kvm->lock); | |
505 | kvm_mmu_reset_context(vcpu); | |
506 | spin_unlock(&vcpu->kvm->lock); | |
507 | return; | |
508 | } | |
509 | EXPORT_SYMBOL_GPL(set_cr0); | |
510 | ||
511 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
512 | { | |
399badf3 | 513 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
6aa8b732 AK |
514 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); |
515 | } | |
516 | EXPORT_SYMBOL_GPL(lmsw); | |
517 | ||
518 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
519 | { | |
520 | if (cr4 & CR4_RESEVED_BITS) { | |
521 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
522 | inject_gp(vcpu); | |
523 | return; | |
524 | } | |
525 | ||
a9058ecd | 526 | if (is_long_mode(vcpu)) { |
6aa8b732 AK |
527 | if (!(cr4 & CR4_PAE_MASK)) { |
528 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
529 | "in long mode\n"); | |
530 | inject_gp(vcpu); | |
531 | return; | |
532 | } | |
533 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & CR4_PAE_MASK) | |
1342d353 | 534 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
535 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
536 | inject_gp(vcpu); | |
537 | } | |
538 | ||
539 | if (cr4 & CR4_VMXE_MASK) { | |
540 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
541 | inject_gp(vcpu); | |
542 | return; | |
543 | } | |
544 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
545 | spin_lock(&vcpu->kvm->lock); | |
546 | kvm_mmu_reset_context(vcpu); | |
547 | spin_unlock(&vcpu->kvm->lock); | |
548 | } | |
549 | EXPORT_SYMBOL_GPL(set_cr4); | |
550 | ||
551 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
552 | { | |
a9058ecd | 553 | if (is_long_mode(vcpu)) { |
d27d4aca | 554 | if (cr3 & CR3_L_MODE_RESEVED_BITS) { |
6aa8b732 AK |
555 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
556 | inject_gp(vcpu); | |
557 | return; | |
558 | } | |
559 | } else { | |
560 | if (cr3 & CR3_RESEVED_BITS) { | |
561 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
562 | inject_gp(vcpu); | |
563 | return; | |
564 | } | |
565 | if (is_paging(vcpu) && is_pae(vcpu) && | |
1342d353 | 566 | !load_pdptrs(vcpu, cr3)) { |
6aa8b732 AK |
567 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
568 | "reserved bits\n"); | |
569 | inject_gp(vcpu); | |
570 | return; | |
571 | } | |
572 | } | |
573 | ||
574 | vcpu->cr3 = cr3; | |
575 | spin_lock(&vcpu->kvm->lock); | |
d21225ee IM |
576 | /* |
577 | * Does the new cr3 value map to physical memory? (Note, we | |
578 | * catch an invalid cr3 even in real-mode, because it would | |
579 | * cause trouble later on when we turn on paging anyway.) | |
580 | * | |
581 | * A real CPU would silently accept an invalid cr3 and would | |
582 | * attempt to use it - with largely undefined (and often hard | |
583 | * to debug) behavior on the guest side. | |
584 | */ | |
585 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
586 | inject_gp(vcpu); | |
587 | else | |
588 | vcpu->mmu.new_cr3(vcpu); | |
6aa8b732 AK |
589 | spin_unlock(&vcpu->kvm->lock); |
590 | } | |
591 | EXPORT_SYMBOL_GPL(set_cr3); | |
592 | ||
593 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
594 | { | |
595 | if ( cr8 & CR8_RESEVED_BITS) { | |
596 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
597 | inject_gp(vcpu); | |
598 | return; | |
599 | } | |
600 | vcpu->cr8 = cr8; | |
601 | } | |
602 | EXPORT_SYMBOL_GPL(set_cr8); | |
603 | ||
604 | void fx_init(struct kvm_vcpu *vcpu) | |
605 | { | |
606 | struct __attribute__ ((__packed__)) fx_image_s { | |
607 | u16 control; //fcw | |
608 | u16 status; //fsw | |
609 | u16 tag; // ftw | |
610 | u16 opcode; //fop | |
611 | u64 ip; // fpu ip | |
612 | u64 operand;// fpu dp | |
613 | u32 mxcsr; | |
614 | u32 mxcsr_mask; | |
615 | ||
616 | } *fx_image; | |
617 | ||
618 | fx_save(vcpu->host_fx_image); | |
619 | fpu_init(); | |
620 | fx_save(vcpu->guest_fx_image); | |
621 | fx_restore(vcpu->host_fx_image); | |
622 | ||
623 | fx_image = (struct fx_image_s *)vcpu->guest_fx_image; | |
624 | fx_image->mxcsr = 0x1f80; | |
625 | memset(vcpu->guest_fx_image + sizeof(struct fx_image_s), | |
626 | 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s)); | |
627 | } | |
628 | EXPORT_SYMBOL_GPL(fx_init); | |
629 | ||
02b27c1f UL |
630 | static void do_remove_write_access(struct kvm_vcpu *vcpu, int slot) |
631 | { | |
632 | spin_lock(&vcpu->kvm->lock); | |
633 | kvm_mmu_slot_remove_write_access(vcpu, slot); | |
634 | spin_unlock(&vcpu->kvm->lock); | |
635 | } | |
636 | ||
6aa8b732 AK |
637 | /* |
638 | * Allocate some memory and give it an address in the guest physical address | |
639 | * space. | |
640 | * | |
641 | * Discontiguous memory is allowed, mostly for framebuffers. | |
642 | */ | |
2c6f5df9 AK |
643 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
644 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
645 | { |
646 | int r; | |
647 | gfn_t base_gfn; | |
648 | unsigned long npages; | |
649 | unsigned long i; | |
650 | struct kvm_memory_slot *memslot; | |
651 | struct kvm_memory_slot old, new; | |
652 | int memory_config_version; | |
653 | ||
654 | r = -EINVAL; | |
655 | /* General sanity checks */ | |
656 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
657 | goto out; | |
658 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
659 | goto out; | |
660 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
661 | goto out; | |
662 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
663 | goto out; | |
664 | ||
665 | memslot = &kvm->memslots[mem->slot]; | |
666 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
667 | npages = mem->memory_size >> PAGE_SHIFT; | |
668 | ||
669 | if (!npages) | |
670 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
671 | ||
672 | raced: | |
673 | spin_lock(&kvm->lock); | |
674 | ||
675 | memory_config_version = kvm->memory_config_version; | |
676 | new = old = *memslot; | |
677 | ||
678 | new.base_gfn = base_gfn; | |
679 | new.npages = npages; | |
680 | new.flags = mem->flags; | |
681 | ||
682 | /* Disallow changing a memory slot's size. */ | |
683 | r = -EINVAL; | |
684 | if (npages && old.npages && npages != old.npages) | |
685 | goto out_unlock; | |
686 | ||
687 | /* Check for overlaps */ | |
688 | r = -EEXIST; | |
689 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
690 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
691 | ||
692 | if (s == memslot) | |
693 | continue; | |
694 | if (!((base_gfn + npages <= s->base_gfn) || | |
695 | (base_gfn >= s->base_gfn + s->npages))) | |
696 | goto out_unlock; | |
697 | } | |
698 | /* | |
699 | * Do memory allocations outside lock. memory_config_version will | |
700 | * detect any races. | |
701 | */ | |
702 | spin_unlock(&kvm->lock); | |
703 | ||
704 | /* Deallocate if slot is being removed */ | |
705 | if (!npages) | |
8b6d44c7 | 706 | new.phys_mem = NULL; |
6aa8b732 AK |
707 | |
708 | /* Free page dirty bitmap if unneeded */ | |
709 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 710 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
711 | |
712 | r = -ENOMEM; | |
713 | ||
714 | /* Allocate if a slot is being created */ | |
715 | if (npages && !new.phys_mem) { | |
716 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
717 | ||
718 | if (!new.phys_mem) | |
719 | goto out_free; | |
720 | ||
721 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
722 | for (i = 0; i < npages; ++i) { | |
723 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
724 | | __GFP_ZERO); | |
725 | if (!new.phys_mem[i]) | |
726 | goto out_free; | |
5972e953 | 727 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
728 | } |
729 | } | |
730 | ||
731 | /* Allocate page dirty bitmap if needed */ | |
732 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
733 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
734 | ||
735 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
736 | if (!new.dirty_bitmap) | |
737 | goto out_free; | |
738 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
739 | } | |
740 | ||
741 | spin_lock(&kvm->lock); | |
742 | ||
743 | if (memory_config_version != kvm->memory_config_version) { | |
744 | spin_unlock(&kvm->lock); | |
745 | kvm_free_physmem_slot(&new, &old); | |
746 | goto raced; | |
747 | } | |
748 | ||
749 | r = -EAGAIN; | |
750 | if (kvm->busy) | |
751 | goto out_unlock; | |
752 | ||
753 | if (mem->slot >= kvm->nmemslots) | |
754 | kvm->nmemslots = mem->slot + 1; | |
755 | ||
756 | *memslot = new; | |
757 | ++kvm->memory_config_version; | |
758 | ||
759 | spin_unlock(&kvm->lock); | |
760 | ||
761 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
762 | struct kvm_vcpu *vcpu; | |
763 | ||
bccf2150 | 764 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
765 | if (!vcpu) |
766 | continue; | |
ff990d59 UL |
767 | if (new.flags & KVM_MEM_LOG_DIRTY_PAGES) |
768 | do_remove_write_access(vcpu, mem->slot); | |
6aa8b732 AK |
769 | kvm_mmu_reset_context(vcpu); |
770 | vcpu_put(vcpu); | |
771 | } | |
772 | ||
773 | kvm_free_physmem_slot(&old, &new); | |
774 | return 0; | |
775 | ||
776 | out_unlock: | |
777 | spin_unlock(&kvm->lock); | |
778 | out_free: | |
779 | kvm_free_physmem_slot(&new, &old); | |
780 | out: | |
781 | return r; | |
782 | } | |
783 | ||
784 | /* | |
785 | * Get (and clear) the dirty memory log for a memory slot. | |
786 | */ | |
2c6f5df9 AK |
787 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
788 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
789 | { |
790 | struct kvm_memory_slot *memslot; | |
791 | int r, i; | |
792 | int n; | |
714b93da | 793 | int cleared; |
6aa8b732 AK |
794 | unsigned long any = 0; |
795 | ||
796 | spin_lock(&kvm->lock); | |
797 | ||
798 | /* | |
799 | * Prevent changes to guest memory configuration even while the lock | |
800 | * is not taken. | |
801 | */ | |
802 | ++kvm->busy; | |
803 | spin_unlock(&kvm->lock); | |
804 | r = -EINVAL; | |
805 | if (log->slot >= KVM_MEMORY_SLOTS) | |
806 | goto out; | |
807 | ||
808 | memslot = &kvm->memslots[log->slot]; | |
809 | r = -ENOENT; | |
810 | if (!memslot->dirty_bitmap) | |
811 | goto out; | |
812 | ||
cd1a4a98 | 813 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 814 | |
cd1a4a98 | 815 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
816 | any = memslot->dirty_bitmap[i]; |
817 | ||
818 | r = -EFAULT; | |
819 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
820 | goto out; | |
821 | ||
6aa8b732 | 822 | if (any) { |
714b93da | 823 | cleared = 0; |
6aa8b732 | 824 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
bccf2150 | 825 | struct kvm_vcpu *vcpu; |
6aa8b732 | 826 | |
bccf2150 | 827 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
828 | if (!vcpu) |
829 | continue; | |
714b93da AK |
830 | if (!cleared) { |
831 | do_remove_write_access(vcpu, log->slot); | |
832 | memset(memslot->dirty_bitmap, 0, n); | |
833 | cleared = 1; | |
834 | } | |
6aa8b732 AK |
835 | kvm_arch_ops->tlb_flush(vcpu); |
836 | vcpu_put(vcpu); | |
837 | } | |
838 | } | |
839 | ||
840 | r = 0; | |
841 | ||
842 | out: | |
843 | spin_lock(&kvm->lock); | |
844 | --kvm->busy; | |
845 | spin_unlock(&kvm->lock); | |
846 | return r; | |
847 | } | |
848 | ||
e8207547 AK |
849 | /* |
850 | * Set a new alias region. Aliases map a portion of physical memory into | |
851 | * another portion. This is useful for memory windows, for example the PC | |
852 | * VGA region. | |
853 | */ | |
854 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
855 | struct kvm_memory_alias *alias) | |
856 | { | |
857 | int r, n; | |
858 | struct kvm_mem_alias *p; | |
859 | ||
860 | r = -EINVAL; | |
861 | /* General sanity checks */ | |
862 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
863 | goto out; | |
864 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
865 | goto out; | |
866 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
867 | goto out; | |
868 | if (alias->guest_phys_addr + alias->memory_size | |
869 | < alias->guest_phys_addr) | |
870 | goto out; | |
871 | if (alias->target_phys_addr + alias->memory_size | |
872 | < alias->target_phys_addr) | |
873 | goto out; | |
874 | ||
875 | spin_lock(&kvm->lock); | |
876 | ||
877 | p = &kvm->aliases[alias->slot]; | |
878 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
879 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
880 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
881 | ||
882 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
883 | if (kvm->aliases[n - 1].npages) | |
884 | break; | |
885 | kvm->naliases = n; | |
886 | ||
887 | spin_unlock(&kvm->lock); | |
888 | ||
889 | vcpu_load(&kvm->vcpus[0]); | |
890 | spin_lock(&kvm->lock); | |
891 | kvm_mmu_zap_all(&kvm->vcpus[0]); | |
892 | spin_unlock(&kvm->lock); | |
893 | vcpu_put(&kvm->vcpus[0]); | |
894 | ||
895 | return 0; | |
896 | ||
897 | out: | |
898 | return r; | |
899 | } | |
900 | ||
901 | static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
902 | { | |
903 | int i; | |
904 | struct kvm_mem_alias *alias; | |
905 | ||
906 | for (i = 0; i < kvm->naliases; ++i) { | |
907 | alias = &kvm->aliases[i]; | |
908 | if (gfn >= alias->base_gfn | |
909 | && gfn < alias->base_gfn + alias->npages) | |
910 | return alias->target_gfn + gfn - alias->base_gfn; | |
911 | } | |
912 | return gfn; | |
913 | } | |
914 | ||
915 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
916 | { |
917 | int i; | |
918 | ||
919 | for (i = 0; i < kvm->nmemslots; ++i) { | |
920 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
921 | ||
922 | if (gfn >= memslot->base_gfn | |
923 | && gfn < memslot->base_gfn + memslot->npages) | |
924 | return memslot; | |
925 | } | |
8b6d44c7 | 926 | return NULL; |
6aa8b732 | 927 | } |
e8207547 AK |
928 | |
929 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
930 | { | |
931 | gfn = unalias_gfn(kvm, gfn); | |
932 | return __gfn_to_memslot(kvm, gfn); | |
933 | } | |
6aa8b732 | 934 | |
954bbbc2 AK |
935 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
936 | { | |
937 | struct kvm_memory_slot *slot; | |
938 | ||
e8207547 AK |
939 | gfn = unalias_gfn(kvm, gfn); |
940 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
941 | if (!slot) |
942 | return NULL; | |
943 | return slot->phys_mem[gfn - slot->base_gfn]; | |
944 | } | |
945 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
946 | ||
6aa8b732 AK |
947 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
948 | { | |
949 | int i; | |
8b6d44c7 | 950 | struct kvm_memory_slot *memslot = NULL; |
6aa8b732 AK |
951 | unsigned long rel_gfn; |
952 | ||
953 | for (i = 0; i < kvm->nmemslots; ++i) { | |
954 | memslot = &kvm->memslots[i]; | |
955 | ||
956 | if (gfn >= memslot->base_gfn | |
957 | && gfn < memslot->base_gfn + memslot->npages) { | |
958 | ||
959 | if (!memslot || !memslot->dirty_bitmap) | |
960 | return; | |
961 | ||
962 | rel_gfn = gfn - memslot->base_gfn; | |
963 | ||
964 | /* avoid RMW */ | |
965 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
966 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
967 | return; | |
968 | } | |
969 | } | |
970 | } | |
971 | ||
972 | static int emulator_read_std(unsigned long addr, | |
973 | unsigned long *val, | |
974 | unsigned int bytes, | |
975 | struct x86_emulate_ctxt *ctxt) | |
976 | { | |
977 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
978 | void *data = val; | |
979 | ||
980 | while (bytes) { | |
981 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
982 | unsigned offset = addr & (PAGE_SIZE-1); | |
983 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
984 | unsigned long pfn; | |
954bbbc2 AK |
985 | struct page *page; |
986 | void *page_virt; | |
6aa8b732 AK |
987 | |
988 | if (gpa == UNMAPPED_GVA) | |
989 | return X86EMUL_PROPAGATE_FAULT; | |
990 | pfn = gpa >> PAGE_SHIFT; | |
954bbbc2 AK |
991 | page = gfn_to_page(vcpu->kvm, pfn); |
992 | if (!page) | |
6aa8b732 | 993 | return X86EMUL_UNHANDLEABLE; |
954bbbc2 | 994 | page_virt = kmap_atomic(page, KM_USER0); |
6aa8b732 | 995 | |
954bbbc2 | 996 | memcpy(data, page_virt + offset, tocopy); |
6aa8b732 | 997 | |
954bbbc2 | 998 | kunmap_atomic(page_virt, KM_USER0); |
6aa8b732 AK |
999 | |
1000 | bytes -= tocopy; | |
1001 | data += tocopy; | |
1002 | addr += tocopy; | |
1003 | } | |
1004 | ||
1005 | return X86EMUL_CONTINUE; | |
1006 | } | |
1007 | ||
1008 | static int emulator_write_std(unsigned long addr, | |
1009 | unsigned long val, | |
1010 | unsigned int bytes, | |
1011 | struct x86_emulate_ctxt *ctxt) | |
1012 | { | |
1013 | printk(KERN_ERR "emulator_write_std: addr %lx n %d\n", | |
1014 | addr, bytes); | |
1015 | return X86EMUL_UNHANDLEABLE; | |
1016 | } | |
1017 | ||
1018 | static int emulator_read_emulated(unsigned long addr, | |
1019 | unsigned long *val, | |
1020 | unsigned int bytes, | |
1021 | struct x86_emulate_ctxt *ctxt) | |
1022 | { | |
1023 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1024 | ||
1025 | if (vcpu->mmio_read_completed) { | |
1026 | memcpy(val, vcpu->mmio_data, bytes); | |
1027 | vcpu->mmio_read_completed = 0; | |
1028 | return X86EMUL_CONTINUE; | |
1029 | } else if (emulator_read_std(addr, val, bytes, ctxt) | |
1030 | == X86EMUL_CONTINUE) | |
1031 | return X86EMUL_CONTINUE; | |
1032 | else { | |
1033 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
d27d4aca | 1034 | |
6aa8b732 | 1035 | if (gpa == UNMAPPED_GVA) |
d27d4aca | 1036 | return X86EMUL_PROPAGATE_FAULT; |
6aa8b732 AK |
1037 | vcpu->mmio_needed = 1; |
1038 | vcpu->mmio_phys_addr = gpa; | |
1039 | vcpu->mmio_size = bytes; | |
1040 | vcpu->mmio_is_write = 0; | |
1041 | ||
1042 | return X86EMUL_UNHANDLEABLE; | |
1043 | } | |
1044 | } | |
1045 | ||
da4a00f0 AK |
1046 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
1047 | unsigned long val, int bytes) | |
1048 | { | |
da4a00f0 AK |
1049 | struct page *page; |
1050 | void *virt; | |
1051 | ||
1052 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
1053 | return 0; | |
954bbbc2 AK |
1054 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
1055 | if (!page) | |
da4a00f0 | 1056 | return 0; |
da4a00f0 | 1057 | kvm_mmu_pre_write(vcpu, gpa, bytes); |
ab51a434 | 1058 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 AK |
1059 | virt = kmap_atomic(page, KM_USER0); |
1060 | memcpy(virt + offset_in_page(gpa), &val, bytes); | |
1061 | kunmap_atomic(virt, KM_USER0); | |
1062 | kvm_mmu_post_write(vcpu, gpa, bytes); | |
1063 | return 1; | |
1064 | } | |
1065 | ||
6aa8b732 AK |
1066 | static int emulator_write_emulated(unsigned long addr, |
1067 | unsigned long val, | |
1068 | unsigned int bytes, | |
1069 | struct x86_emulate_ctxt *ctxt) | |
1070 | { | |
1071 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1072 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1073 | ||
1074 | if (gpa == UNMAPPED_GVA) | |
1075 | return X86EMUL_PROPAGATE_FAULT; | |
1076 | ||
da4a00f0 AK |
1077 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1078 | return X86EMUL_CONTINUE; | |
1079 | ||
6aa8b732 AK |
1080 | vcpu->mmio_needed = 1; |
1081 | vcpu->mmio_phys_addr = gpa; | |
1082 | vcpu->mmio_size = bytes; | |
1083 | vcpu->mmio_is_write = 1; | |
1084 | memcpy(vcpu->mmio_data, &val, bytes); | |
1085 | ||
1086 | return X86EMUL_CONTINUE; | |
1087 | } | |
1088 | ||
1089 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
1090 | unsigned long old, | |
1091 | unsigned long new, | |
1092 | unsigned int bytes, | |
1093 | struct x86_emulate_ctxt *ctxt) | |
1094 | { | |
1095 | static int reported; | |
1096 | ||
1097 | if (!reported) { | |
1098 | reported = 1; | |
1099 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1100 | } | |
1101 | return emulator_write_emulated(addr, new, bytes, ctxt); | |
1102 | } | |
1103 | ||
32b35627 AK |
1104 | #ifdef CONFIG_X86_32 |
1105 | ||
1106 | static int emulator_cmpxchg8b_emulated(unsigned long addr, | |
1107 | unsigned long old_lo, | |
1108 | unsigned long old_hi, | |
1109 | unsigned long new_lo, | |
1110 | unsigned long new_hi, | |
1111 | struct x86_emulate_ctxt *ctxt) | |
1112 | { | |
1113 | static int reported; | |
1114 | int r; | |
1115 | ||
1116 | if (!reported) { | |
1117 | reported = 1; | |
1118 | printk(KERN_WARNING "kvm: emulating exchange8b as write\n"); | |
1119 | } | |
1120 | r = emulator_write_emulated(addr, new_lo, 4, ctxt); | |
1121 | if (r != X86EMUL_CONTINUE) | |
1122 | return r; | |
1123 | return emulator_write_emulated(addr+4, new_hi, 4, ctxt); | |
1124 | } | |
1125 | ||
1126 | #endif | |
1127 | ||
6aa8b732 AK |
1128 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
1129 | { | |
1130 | return kvm_arch_ops->get_segment_base(vcpu, seg); | |
1131 | } | |
1132 | ||
1133 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1134 | { | |
6aa8b732 AK |
1135 | return X86EMUL_CONTINUE; |
1136 | } | |
1137 | ||
1138 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1139 | { | |
399badf3 | 1140 | unsigned long cr0; |
6aa8b732 | 1141 | |
399badf3 AK |
1142 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
1143 | cr0 = vcpu->cr0 & ~CR0_TS_MASK; | |
6aa8b732 AK |
1144 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1145 | return X86EMUL_CONTINUE; | |
1146 | } | |
1147 | ||
1148 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1149 | { | |
1150 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1151 | ||
1152 | switch (dr) { | |
1153 | case 0 ... 3: | |
1154 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1155 | return X86EMUL_CONTINUE; | |
1156 | default: | |
1157 | printk(KERN_DEBUG "%s: unexpected dr %u\n", | |
1158 | __FUNCTION__, dr); | |
1159 | return X86EMUL_UNHANDLEABLE; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1164 | { | |
1165 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1166 | int exception; | |
1167 | ||
1168 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1169 | if (exception) { | |
1170 | /* FIXME: better handling */ | |
1171 | return X86EMUL_UNHANDLEABLE; | |
1172 | } | |
1173 | return X86EMUL_CONTINUE; | |
1174 | } | |
1175 | ||
1176 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1177 | { | |
1178 | static int reported; | |
1179 | u8 opcodes[4]; | |
1180 | unsigned long rip = ctxt->vcpu->rip; | |
1181 | unsigned long rip_linear; | |
1182 | ||
1183 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1184 | ||
1185 | if (reported) | |
1186 | return; | |
1187 | ||
1188 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt); | |
1189 | ||
1190 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1191 | " rip %lx %02x %02x %02x %02x\n", | |
1192 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1193 | reported = 1; | |
1194 | } | |
1195 | ||
1196 | struct x86_emulate_ops emulate_ops = { | |
1197 | .read_std = emulator_read_std, | |
1198 | .write_std = emulator_write_std, | |
1199 | .read_emulated = emulator_read_emulated, | |
1200 | .write_emulated = emulator_write_emulated, | |
1201 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
32b35627 AK |
1202 | #ifdef CONFIG_X86_32 |
1203 | .cmpxchg8b_emulated = emulator_cmpxchg8b_emulated, | |
1204 | #endif | |
6aa8b732 AK |
1205 | }; |
1206 | ||
1207 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1208 | struct kvm_run *run, | |
1209 | unsigned long cr2, | |
1210 | u16 error_code) | |
1211 | { | |
1212 | struct x86_emulate_ctxt emulate_ctxt; | |
1213 | int r; | |
1214 | int cs_db, cs_l; | |
1215 | ||
1216 | kvm_arch_ops->cache_regs(vcpu); | |
1217 | ||
1218 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1219 | ||
1220 | emulate_ctxt.vcpu = vcpu; | |
1221 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1222 | emulate_ctxt.cr2 = cr2; | |
1223 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1224 | ? X86EMUL_MODE_REAL : cs_l | |
1225 | ? X86EMUL_MODE_PROT64 : cs_db | |
1226 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1227 | ||
1228 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1229 | emulate_ctxt.cs_base = 0; | |
1230 | emulate_ctxt.ds_base = 0; | |
1231 | emulate_ctxt.es_base = 0; | |
1232 | emulate_ctxt.ss_base = 0; | |
1233 | } else { | |
1234 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1235 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1236 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1237 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1238 | } | |
1239 | ||
1240 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1241 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1242 | ||
1243 | vcpu->mmio_is_write = 0; | |
1244 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); | |
1245 | ||
1246 | if ((r || vcpu->mmio_is_write) && run) { | |
1247 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
1248 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1249 | run->mmio.len = vcpu->mmio_size; | |
1250 | run->mmio.is_write = vcpu->mmio_is_write; | |
1251 | } | |
1252 | ||
1253 | if (r) { | |
a436036b AK |
1254 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1255 | return EMULATE_DONE; | |
6aa8b732 AK |
1256 | if (!vcpu->mmio_needed) { |
1257 | report_emulation_failure(&emulate_ctxt); | |
1258 | return EMULATE_FAIL; | |
1259 | } | |
1260 | return EMULATE_DO_MMIO; | |
1261 | } | |
1262 | ||
1263 | kvm_arch_ops->decache_regs(vcpu); | |
1264 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1265 | ||
1266 | if (vcpu->mmio_is_write) | |
1267 | return EMULATE_DO_MMIO; | |
1268 | ||
1269 | return EMULATE_DONE; | |
1270 | } | |
1271 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1272 | ||
270fd9b9 AK |
1273 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1274 | { | |
1275 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1276 | ||
9b22bf57 | 1277 | kvm_arch_ops->cache_regs(vcpu); |
270fd9b9 AK |
1278 | ret = -KVM_EINVAL; |
1279 | #ifdef CONFIG_X86_64 | |
1280 | if (is_long_mode(vcpu)) { | |
1281 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1282 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1283 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1284 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1285 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1286 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1287 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1288 | } else | |
1289 | #endif | |
1290 | { | |
1291 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1292 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1293 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1294 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1295 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1296 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1297 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1298 | } | |
1299 | switch (nr) { | |
1300 | default: | |
b4e63f56 AK |
1301 | run->hypercall.args[0] = a0; |
1302 | run->hypercall.args[1] = a1; | |
1303 | run->hypercall.args[2] = a2; | |
1304 | run->hypercall.args[3] = a3; | |
1305 | run->hypercall.args[4] = a4; | |
1306 | run->hypercall.args[5] = a5; | |
1307 | run->hypercall.ret = ret; | |
1308 | run->hypercall.longmode = is_long_mode(vcpu); | |
1309 | kvm_arch_ops->decache_regs(vcpu); | |
1310 | return 0; | |
270fd9b9 AK |
1311 | } |
1312 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
9b22bf57 | 1313 | kvm_arch_ops->decache_regs(vcpu); |
270fd9b9 AK |
1314 | return 1; |
1315 | } | |
1316 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1317 | ||
6aa8b732 AK |
1318 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1319 | { | |
1320 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1321 | } | |
1322 | ||
1323 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1324 | { | |
1325 | struct descriptor_table dt = { limit, base }; | |
1326 | ||
1327 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1328 | } | |
1329 | ||
1330 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1331 | { | |
1332 | struct descriptor_table dt = { limit, base }; | |
1333 | ||
1334 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1335 | } | |
1336 | ||
1337 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1338 | unsigned long *rflags) | |
1339 | { | |
1340 | lmsw(vcpu, msw); | |
1341 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1342 | } | |
1343 | ||
1344 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1345 | { | |
399badf3 | 1346 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1347 | switch (cr) { |
1348 | case 0: | |
1349 | return vcpu->cr0; | |
1350 | case 2: | |
1351 | return vcpu->cr2; | |
1352 | case 3: | |
1353 | return vcpu->cr3; | |
1354 | case 4: | |
1355 | return vcpu->cr4; | |
1356 | default: | |
1357 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1358 | return 0; | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1363 | unsigned long *rflags) | |
1364 | { | |
1365 | switch (cr) { | |
1366 | case 0: | |
1367 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1368 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1369 | break; | |
1370 | case 2: | |
1371 | vcpu->cr2 = val; | |
1372 | break; | |
1373 | case 3: | |
1374 | set_cr3(vcpu, val); | |
1375 | break; | |
1376 | case 4: | |
1377 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1378 | break; | |
1379 | default: | |
1380 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1381 | } | |
1382 | } | |
1383 | ||
102d8325 IM |
1384 | /* |
1385 | * Register the para guest with the host: | |
1386 | */ | |
1387 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1388 | { | |
1389 | struct kvm_vcpu_para_state *para_state; | |
1390 | hpa_t para_state_hpa, hypercall_hpa; | |
1391 | struct page *para_state_page; | |
1392 | unsigned char *hypercall; | |
1393 | gpa_t hypercall_gpa; | |
1394 | ||
1395 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1396 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1397 | ||
1398 | /* | |
1399 | * Needs to be page aligned: | |
1400 | */ | |
1401 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1402 | goto err_gp; | |
1403 | ||
1404 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1405 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1406 | if (is_error_hpa(para_state_hpa)) | |
1407 | goto err_gp; | |
1408 | ||
ab51a434 | 1409 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 IM |
1410 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
1411 | para_state = kmap_atomic(para_state_page, KM_USER0); | |
1412 | ||
1413 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1414 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1415 | ||
1416 | para_state->host_version = KVM_PARA_API_VERSION; | |
1417 | /* | |
1418 | * We cannot support guests that try to register themselves | |
1419 | * with a newer API version than the host supports: | |
1420 | */ | |
1421 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1422 | para_state->ret = -KVM_EINVAL; | |
1423 | goto err_kunmap_skip; | |
1424 | } | |
1425 | ||
1426 | hypercall_gpa = para_state->hypercall_gpa; | |
1427 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1428 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1429 | if (is_error_hpa(hypercall_hpa)) { | |
1430 | para_state->ret = -KVM_EINVAL; | |
1431 | goto err_kunmap_skip; | |
1432 | } | |
1433 | ||
1434 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1435 | vcpu->para_state_page = para_state_page; | |
1436 | vcpu->para_state_gpa = para_state_gpa; | |
1437 | vcpu->hypercall_gpa = hypercall_gpa; | |
1438 | ||
ab51a434 | 1439 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1440 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1441 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1442 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1443 | kunmap_atomic(hypercall, KM_USER1); | |
1444 | ||
1445 | para_state->ret = 0; | |
1446 | err_kunmap_skip: | |
1447 | kunmap_atomic(para_state, KM_USER0); | |
1448 | return 0; | |
1449 | err_gp: | |
1450 | return 1; | |
1451 | } | |
1452 | ||
3bab1f5d AK |
1453 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1454 | { | |
1455 | u64 data; | |
1456 | ||
1457 | switch (msr) { | |
1458 | case 0xc0010010: /* SYSCFG */ | |
1459 | case 0xc0010015: /* HWCR */ | |
1460 | case MSR_IA32_PLATFORM_ID: | |
1461 | case MSR_IA32_P5_MC_ADDR: | |
1462 | case MSR_IA32_P5_MC_TYPE: | |
1463 | case MSR_IA32_MC0_CTL: | |
1464 | case MSR_IA32_MCG_STATUS: | |
1465 | case MSR_IA32_MCG_CAP: | |
1466 | case MSR_IA32_MC0_MISC: | |
1467 | case MSR_IA32_MC0_MISC+4: | |
1468 | case MSR_IA32_MC0_MISC+8: | |
1469 | case MSR_IA32_MC0_MISC+12: | |
1470 | case MSR_IA32_MC0_MISC+16: | |
1471 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1472 | case MSR_IA32_PERF_STATUS: |
3bab1f5d AK |
1473 | /* MTRR registers */ |
1474 | case 0xfe: | |
1475 | case 0x200 ... 0x2ff: | |
1476 | data = 0; | |
1477 | break; | |
a8d13ea2 AK |
1478 | case 0xcd: /* fsb frequency */ |
1479 | data = 3; | |
1480 | break; | |
3bab1f5d AK |
1481 | case MSR_IA32_APICBASE: |
1482 | data = vcpu->apic_base; | |
1483 | break; | |
6f00e68f AK |
1484 | case MSR_IA32_MISC_ENABLE: |
1485 | data = vcpu->ia32_misc_enable_msr; | |
1486 | break; | |
3bab1f5d AK |
1487 | #ifdef CONFIG_X86_64 |
1488 | case MSR_EFER: | |
1489 | data = vcpu->shadow_efer; | |
1490 | break; | |
1491 | #endif | |
1492 | default: | |
1493 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr); | |
1494 | return 1; | |
1495 | } | |
1496 | *pdata = data; | |
1497 | return 0; | |
1498 | } | |
1499 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1500 | ||
6aa8b732 AK |
1501 | /* |
1502 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1503 | * Returns 0 on success, non-0 otherwise. | |
1504 | * Assumes vcpu_load() was already called. | |
1505 | */ | |
1506 | static int get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1507 | { | |
1508 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1509 | } | |
1510 | ||
05b3e0c2 | 1511 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1512 | |
3bab1f5d | 1513 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1514 | { |
6aa8b732 AK |
1515 | if (efer & EFER_RESERVED_BITS) { |
1516 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1517 | efer); | |
1518 | inject_gp(vcpu); | |
1519 | return; | |
1520 | } | |
1521 | ||
1522 | if (is_paging(vcpu) | |
1523 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1524 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1525 | inject_gp(vcpu); | |
1526 | return; | |
1527 | } | |
1528 | ||
7725f0ba AK |
1529 | kvm_arch_ops->set_efer(vcpu, efer); |
1530 | ||
6aa8b732 AK |
1531 | efer &= ~EFER_LMA; |
1532 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1533 | ||
1534 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1535 | } |
6aa8b732 AK |
1536 | |
1537 | #endif | |
1538 | ||
3bab1f5d AK |
1539 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1540 | { | |
1541 | switch (msr) { | |
1542 | #ifdef CONFIG_X86_64 | |
1543 | case MSR_EFER: | |
1544 | set_efer(vcpu, data); | |
1545 | break; | |
1546 | #endif | |
1547 | case MSR_IA32_MC0_STATUS: | |
1548 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
1549 | __FUNCTION__, data); | |
1550 | break; | |
0e5bf0d0 SK |
1551 | case MSR_IA32_MCG_STATUS: |
1552 | printk(KERN_WARNING "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
1553 | __FUNCTION__, data); | |
1554 | break; | |
3bab1f5d AK |
1555 | case MSR_IA32_UCODE_REV: |
1556 | case MSR_IA32_UCODE_WRITE: | |
1557 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1558 | break; | |
1559 | case MSR_IA32_APICBASE: | |
1560 | vcpu->apic_base = data; | |
1561 | break; | |
6f00e68f AK |
1562 | case MSR_IA32_MISC_ENABLE: |
1563 | vcpu->ia32_misc_enable_msr = data; | |
1564 | break; | |
102d8325 IM |
1565 | /* |
1566 | * This is the 'probe whether the host is KVM' logic: | |
1567 | */ | |
1568 | case MSR_KVM_API_MAGIC: | |
1569 | return vcpu_register_para(vcpu, data); | |
1570 | ||
3bab1f5d AK |
1571 | default: |
1572 | printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr); | |
1573 | return 1; | |
1574 | } | |
1575 | return 0; | |
1576 | } | |
1577 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1578 | ||
6aa8b732 AK |
1579 | /* |
1580 | * Writes msr value into into the appropriate "register". | |
1581 | * Returns 0 on success, non-0 otherwise. | |
1582 | * Assumes vcpu_load() was already called. | |
1583 | */ | |
1584 | static int set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1585 | { | |
1586 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1587 | } | |
1588 | ||
1589 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1590 | { | |
1591 | vcpu_put(vcpu); | |
1592 | cond_resched(); | |
bccf2150 | 1593 | vcpu_load(vcpu); |
6aa8b732 AK |
1594 | } |
1595 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1596 | ||
1597 | void load_msrs(struct vmx_msr_entry *e, int n) | |
1598 | { | |
1599 | int i; | |
1600 | ||
1601 | for (i = 0; i < n; ++i) | |
1602 | wrmsrl(e[i].index, e[i].data); | |
1603 | } | |
1604 | EXPORT_SYMBOL_GPL(load_msrs); | |
1605 | ||
1606 | void save_msrs(struct vmx_msr_entry *e, int n) | |
1607 | { | |
1608 | int i; | |
1609 | ||
1610 | for (i = 0; i < n; ++i) | |
1611 | rdmsrl(e[i].index, e[i].data); | |
1612 | } | |
1613 | EXPORT_SYMBOL_GPL(save_msrs); | |
1614 | ||
06465c5a AK |
1615 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1616 | { | |
1617 | int i; | |
1618 | u32 function; | |
1619 | struct kvm_cpuid_entry *e, *best; | |
1620 | ||
1621 | kvm_arch_ops->cache_regs(vcpu); | |
1622 | function = vcpu->regs[VCPU_REGS_RAX]; | |
1623 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1624 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1625 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1626 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1627 | best = NULL; | |
1628 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1629 | e = &vcpu->cpuid_entries[i]; | |
1630 | if (e->function == function) { | |
1631 | best = e; | |
1632 | break; | |
1633 | } | |
1634 | /* | |
1635 | * Both basic or both extended? | |
1636 | */ | |
1637 | if (((e->function ^ function) & 0x80000000) == 0) | |
1638 | if (!best || e->function > best->function) | |
1639 | best = e; | |
1640 | } | |
1641 | if (best) { | |
1642 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1643 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1644 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1645 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1646 | } | |
1647 | kvm_arch_ops->decache_regs(vcpu); | |
1648 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1649 | } | |
1650 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1651 | ||
039576c0 | 1652 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1653 | { |
039576c0 AK |
1654 | void *p = vcpu->pio_data; |
1655 | void *q; | |
1656 | unsigned bytes; | |
1657 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1658 | ||
1659 | kvm_arch_ops->vcpu_put(vcpu); | |
1660 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, | |
1661 | PAGE_KERNEL); | |
1662 | if (!q) { | |
1663 | kvm_arch_ops->vcpu_load(vcpu); | |
1664 | free_pio_guest_pages(vcpu); | |
1665 | return -ENOMEM; | |
1666 | } | |
1667 | q += vcpu->pio.guest_page_offset; | |
1668 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1669 | if (vcpu->pio.in) | |
1670 | memcpy(q, p, bytes); | |
1671 | else | |
1672 | memcpy(p, q, bytes); | |
1673 | q -= vcpu->pio.guest_page_offset; | |
1674 | vunmap(q); | |
1675 | kvm_arch_ops->vcpu_load(vcpu); | |
1676 | free_pio_guest_pages(vcpu); | |
1677 | return 0; | |
1678 | } | |
1679 | ||
1680 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1681 | { | |
1682 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1683 | long delta; |
039576c0 | 1684 | int r; |
46fc1477 AK |
1685 | |
1686 | kvm_arch_ops->cache_regs(vcpu); | |
1687 | ||
1688 | if (!io->string) { | |
039576c0 AK |
1689 | if (io->in) |
1690 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1691 | io->size); |
1692 | } else { | |
039576c0 AK |
1693 | if (io->in) { |
1694 | r = pio_copy_data(vcpu); | |
1695 | if (r) { | |
1696 | kvm_arch_ops->cache_regs(vcpu); | |
1697 | return r; | |
1698 | } | |
1699 | } | |
1700 | ||
46fc1477 AK |
1701 | delta = 1; |
1702 | if (io->rep) { | |
039576c0 | 1703 | delta *= io->cur_count; |
46fc1477 AK |
1704 | /* |
1705 | * The size of the register should really depend on | |
1706 | * current address size. | |
1707 | */ | |
1708 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1709 | } | |
039576c0 | 1710 | if (io->down) |
46fc1477 AK |
1711 | delta = -delta; |
1712 | delta *= io->size; | |
039576c0 | 1713 | if (io->in) |
46fc1477 AK |
1714 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1715 | else | |
1716 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1717 | } | |
1718 | ||
46fc1477 AK |
1719 | vcpu->run->io_completed = 0; |
1720 | ||
1721 | kvm_arch_ops->decache_regs(vcpu); | |
1722 | ||
039576c0 AK |
1723 | io->count -= io->cur_count; |
1724 | io->cur_count = 0; | |
1725 | ||
1726 | if (!io->count) | |
1727 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1728 | return 0; | |
46fc1477 AK |
1729 | } |
1730 | ||
039576c0 AK |
1731 | int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
1732 | int size, unsigned long count, int string, int down, | |
1733 | gva_t address, int rep, unsigned port) | |
1734 | { | |
1735 | unsigned now, in_page; | |
1736 | int i; | |
1737 | int nr_pages = 1; | |
1738 | struct page *page; | |
1739 | ||
1740 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1741 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1742 | vcpu->run->io.size = size; | |
1743 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1744 | vcpu->run->io.count = count; | |
1745 | vcpu->run->io.port = port; | |
1746 | vcpu->pio.count = count; | |
1747 | vcpu->pio.cur_count = count; | |
1748 | vcpu->pio.size = size; | |
1749 | vcpu->pio.in = in; | |
1750 | vcpu->pio.string = string; | |
1751 | vcpu->pio.down = down; | |
1752 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
1753 | vcpu->pio.rep = rep; | |
1754 | ||
1755 | if (!string) { | |
1756 | kvm_arch_ops->cache_regs(vcpu); | |
1757 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); | |
1758 | kvm_arch_ops->decache_regs(vcpu); | |
1759 | return 0; | |
1760 | } | |
1761 | ||
1762 | if (!count) { | |
1763 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1764 | return 1; | |
1765 | } | |
1766 | ||
1767 | now = min(count, PAGE_SIZE / size); | |
1768 | ||
1769 | if (!down) | |
1770 | in_page = PAGE_SIZE - offset_in_page(address); | |
1771 | else | |
1772 | in_page = offset_in_page(address) + size; | |
1773 | now = min(count, (unsigned long)in_page / size); | |
1774 | if (!now) { | |
1775 | /* | |
1776 | * String I/O straddles page boundary. Pin two guest pages | |
1777 | * so that we satisfy atomicity constraints. Do just one | |
1778 | * transaction to avoid complexity. | |
1779 | */ | |
1780 | nr_pages = 2; | |
1781 | now = 1; | |
1782 | } | |
1783 | if (down) { | |
1784 | /* | |
1785 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
1786 | */ | |
1787 | printk(KERN_ERR "kvm: guest string pio down\n"); | |
1788 | inject_gp(vcpu); | |
1789 | return 1; | |
1790 | } | |
1791 | vcpu->run->io.count = now; | |
1792 | vcpu->pio.cur_count = now; | |
1793 | ||
1794 | for (i = 0; i < nr_pages; ++i) { | |
1795 | spin_lock(&vcpu->kvm->lock); | |
1796 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); | |
1797 | if (page) | |
1798 | get_page(page); | |
1799 | vcpu->pio.guest_pages[i] = page; | |
1800 | spin_unlock(&vcpu->kvm->lock); | |
1801 | if (!page) { | |
1802 | inject_gp(vcpu); | |
1803 | free_pio_guest_pages(vcpu); | |
1804 | return 1; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | if (!vcpu->pio.in) | |
1809 | return pio_copy_data(vcpu); | |
1810 | return 0; | |
1811 | } | |
1812 | EXPORT_SYMBOL_GPL(kvm_setup_pio); | |
1813 | ||
bccf2150 | 1814 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1815 | { |
6aa8b732 | 1816 | int r; |
1961d276 | 1817 | sigset_t sigsaved; |
6aa8b732 | 1818 | |
bccf2150 | 1819 | vcpu_load(vcpu); |
6aa8b732 | 1820 | |
1961d276 AK |
1821 | if (vcpu->sigset_active) |
1822 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1823 | ||
54810342 DL |
1824 | /* re-sync apic's tpr */ |
1825 | vcpu->cr8 = kvm_run->cr8; | |
1826 | ||
46fc1477 | 1827 | if (kvm_run->io_completed) { |
039576c0 AK |
1828 | if (vcpu->pio.cur_count) { |
1829 | r = complete_pio(vcpu); | |
1830 | if (r) | |
1831 | goto out; | |
1832 | } else { | |
46fc1477 AK |
1833 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); |
1834 | vcpu->mmio_read_completed = 1; | |
1835 | } | |
6aa8b732 AK |
1836 | } |
1837 | ||
1838 | vcpu->mmio_needed = 0; | |
1839 | ||
8eb7d334 | 1840 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
b4e63f56 AK |
1841 | kvm_arch_ops->cache_regs(vcpu); |
1842 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; | |
1843 | kvm_arch_ops->decache_regs(vcpu); | |
1844 | } | |
1845 | ||
6aa8b732 AK |
1846 | r = kvm_arch_ops->run(vcpu, kvm_run); |
1847 | ||
039576c0 | 1848 | out: |
1961d276 AK |
1849 | if (vcpu->sigset_active) |
1850 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1851 | ||
6aa8b732 AK |
1852 | vcpu_put(vcpu); |
1853 | return r; | |
1854 | } | |
1855 | ||
bccf2150 AK |
1856 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
1857 | struct kvm_regs *regs) | |
6aa8b732 | 1858 | { |
bccf2150 | 1859 | vcpu_load(vcpu); |
6aa8b732 AK |
1860 | |
1861 | kvm_arch_ops->cache_regs(vcpu); | |
1862 | ||
1863 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
1864 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
1865 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
1866 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
1867 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
1868 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
1869 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
1870 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 1871 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1872 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
1873 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
1874 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
1875 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
1876 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
1877 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
1878 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
1879 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
1880 | #endif | |
1881 | ||
1882 | regs->rip = vcpu->rip; | |
1883 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
1884 | ||
1885 | /* | |
1886 | * Don't leak debug flags in case they were set for guest debugging | |
1887 | */ | |
1888 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
1889 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1890 | ||
1891 | vcpu_put(vcpu); | |
1892 | ||
1893 | return 0; | |
1894 | } | |
1895 | ||
bccf2150 AK |
1896 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
1897 | struct kvm_regs *regs) | |
6aa8b732 | 1898 | { |
bccf2150 | 1899 | vcpu_load(vcpu); |
6aa8b732 AK |
1900 | |
1901 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
1902 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
1903 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
1904 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
1905 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
1906 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
1907 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
1908 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 1909 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1910 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
1911 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
1912 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
1913 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
1914 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
1915 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
1916 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
1917 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
1918 | #endif | |
1919 | ||
1920 | vcpu->rip = regs->rip; | |
1921 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
1922 | ||
1923 | kvm_arch_ops->decache_regs(vcpu); | |
1924 | ||
1925 | vcpu_put(vcpu); | |
1926 | ||
1927 | return 0; | |
1928 | } | |
1929 | ||
1930 | static void get_segment(struct kvm_vcpu *vcpu, | |
1931 | struct kvm_segment *var, int seg) | |
1932 | { | |
1933 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
1934 | } | |
1935 | ||
bccf2150 AK |
1936 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
1937 | struct kvm_sregs *sregs) | |
6aa8b732 | 1938 | { |
6aa8b732 AK |
1939 | struct descriptor_table dt; |
1940 | ||
bccf2150 | 1941 | vcpu_load(vcpu); |
6aa8b732 AK |
1942 | |
1943 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
1944 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
1945 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
1946 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
1947 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
1948 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
1949 | ||
1950 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
1951 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
1952 | ||
1953 | kvm_arch_ops->get_idt(vcpu, &dt); | |
1954 | sregs->idt.limit = dt.limit; | |
1955 | sregs->idt.base = dt.base; | |
1956 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
1957 | sregs->gdt.limit = dt.limit; | |
1958 | sregs->gdt.base = dt.base; | |
1959 | ||
399badf3 | 1960 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1961 | sregs->cr0 = vcpu->cr0; |
1962 | sregs->cr2 = vcpu->cr2; | |
1963 | sregs->cr3 = vcpu->cr3; | |
1964 | sregs->cr4 = vcpu->cr4; | |
1965 | sregs->cr8 = vcpu->cr8; | |
1966 | sregs->efer = vcpu->shadow_efer; | |
1967 | sregs->apic_base = vcpu->apic_base; | |
1968 | ||
1969 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
1970 | sizeof sregs->interrupt_bitmap); | |
1971 | ||
1972 | vcpu_put(vcpu); | |
1973 | ||
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | static void set_segment(struct kvm_vcpu *vcpu, | |
1978 | struct kvm_segment *var, int seg) | |
1979 | { | |
1980 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
1981 | } | |
1982 | ||
bccf2150 AK |
1983 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
1984 | struct kvm_sregs *sregs) | |
6aa8b732 | 1985 | { |
6aa8b732 AK |
1986 | int mmu_reset_needed = 0; |
1987 | int i; | |
1988 | struct descriptor_table dt; | |
1989 | ||
bccf2150 | 1990 | vcpu_load(vcpu); |
6aa8b732 | 1991 | |
6aa8b732 AK |
1992 | dt.limit = sregs->idt.limit; |
1993 | dt.base = sregs->idt.base; | |
1994 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1995 | dt.limit = sregs->gdt.limit; | |
1996 | dt.base = sregs->gdt.base; | |
1997 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1998 | ||
1999 | vcpu->cr2 = sregs->cr2; | |
2000 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2001 | vcpu->cr3 = sregs->cr3; | |
2002 | ||
2003 | vcpu->cr8 = sregs->cr8; | |
2004 | ||
2005 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2006 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2007 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
2008 | #endif | |
2009 | vcpu->apic_base = sregs->apic_base; | |
2010 | ||
399badf3 AK |
2011 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
2012 | ||
6aa8b732 | 2013 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
f6528b03 | 2014 | kvm_arch_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2015 | |
2016 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
2017 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
2018 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2019 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2020 | |
2021 | if (mmu_reset_needed) | |
2022 | kvm_mmu_reset_context(vcpu); | |
2023 | ||
2024 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2025 | sizeof vcpu->irq_pending); | |
2026 | vcpu->irq_summary = 0; | |
2027 | for (i = 0; i < NR_IRQ_WORDS; ++i) | |
2028 | if (vcpu->irq_pending[i]) | |
2029 | __set_bit(i, &vcpu->irq_summary); | |
2030 | ||
024aa1c0 AK |
2031 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2032 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2033 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2034 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2035 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2036 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2037 | ||
2038 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2039 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2040 | ||
6aa8b732 AK |
2041 | vcpu_put(vcpu); |
2042 | ||
2043 | return 0; | |
2044 | } | |
2045 | ||
2046 | /* | |
2047 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2048 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2049 | * |
2050 | * This list is modified at module load time to reflect the | |
2051 | * capabilities of the host cpu. | |
6aa8b732 AK |
2052 | */ |
2053 | static u32 msrs_to_save[] = { | |
2054 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2055 | MSR_K6_STAR, | |
05b3e0c2 | 2056 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2057 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2058 | #endif | |
2059 | MSR_IA32_TIME_STAMP_COUNTER, | |
2060 | }; | |
2061 | ||
bf591b24 MR |
2062 | static unsigned num_msrs_to_save; |
2063 | ||
6f00e68f AK |
2064 | static u32 emulated_msrs[] = { |
2065 | MSR_IA32_MISC_ENABLE, | |
2066 | }; | |
2067 | ||
bf591b24 MR |
2068 | static __init void kvm_init_msr_list(void) |
2069 | { | |
2070 | u32 dummy[2]; | |
2071 | unsigned i, j; | |
2072 | ||
2073 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2074 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2075 | continue; | |
2076 | if (j < i) | |
2077 | msrs_to_save[j] = msrs_to_save[i]; | |
2078 | j++; | |
2079 | } | |
2080 | num_msrs_to_save = j; | |
2081 | } | |
6aa8b732 AK |
2082 | |
2083 | /* | |
2084 | * Adapt set_msr() to msr_io()'s calling convention | |
2085 | */ | |
2086 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2087 | { | |
2088 | return set_msr(vcpu, index, *data); | |
2089 | } | |
2090 | ||
2091 | /* | |
2092 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2093 | * | |
2094 | * @return number of msrs set successfully. | |
2095 | */ | |
bccf2150 | 2096 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2097 | struct kvm_msr_entry *entries, |
2098 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2099 | unsigned index, u64 *data)) | |
2100 | { | |
6aa8b732 AK |
2101 | int i; |
2102 | ||
bccf2150 | 2103 | vcpu_load(vcpu); |
6aa8b732 AK |
2104 | |
2105 | for (i = 0; i < msrs->nmsrs; ++i) | |
2106 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2107 | break; | |
2108 | ||
2109 | vcpu_put(vcpu); | |
2110 | ||
2111 | return i; | |
2112 | } | |
2113 | ||
2114 | /* | |
2115 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2116 | * | |
2117 | * @return number of msrs set successfully. | |
2118 | */ | |
bccf2150 | 2119 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2120 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2121 | unsigned index, u64 *data), | |
2122 | int writeback) | |
2123 | { | |
2124 | struct kvm_msrs msrs; | |
2125 | struct kvm_msr_entry *entries; | |
2126 | int r, n; | |
2127 | unsigned size; | |
2128 | ||
2129 | r = -EFAULT; | |
2130 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2131 | goto out; | |
2132 | ||
2133 | r = -E2BIG; | |
2134 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2135 | goto out; | |
2136 | ||
2137 | r = -ENOMEM; | |
2138 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2139 | entries = vmalloc(size); | |
2140 | if (!entries) | |
2141 | goto out; | |
2142 | ||
2143 | r = -EFAULT; | |
2144 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2145 | goto out_free; | |
2146 | ||
bccf2150 | 2147 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2148 | if (r < 0) |
2149 | goto out_free; | |
2150 | ||
2151 | r = -EFAULT; | |
2152 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2153 | goto out_free; | |
2154 | ||
2155 | r = n; | |
2156 | ||
2157 | out_free: | |
2158 | vfree(entries); | |
2159 | out: | |
2160 | return r; | |
2161 | } | |
2162 | ||
2163 | /* | |
2164 | * Translate a guest virtual address to a guest physical address. | |
2165 | */ | |
bccf2150 AK |
2166 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2167 | struct kvm_translation *tr) | |
6aa8b732 AK |
2168 | { |
2169 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2170 | gpa_t gpa; |
2171 | ||
bccf2150 AK |
2172 | vcpu_load(vcpu); |
2173 | spin_lock(&vcpu->kvm->lock); | |
6aa8b732 AK |
2174 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2175 | tr->physical_address = gpa; | |
2176 | tr->valid = gpa != UNMAPPED_GVA; | |
2177 | tr->writeable = 1; | |
2178 | tr->usermode = 0; | |
bccf2150 | 2179 | spin_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2180 | vcpu_put(vcpu); |
2181 | ||
2182 | return 0; | |
2183 | } | |
2184 | ||
bccf2150 AK |
2185 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2186 | struct kvm_interrupt *irq) | |
6aa8b732 | 2187 | { |
6aa8b732 AK |
2188 | if (irq->irq < 0 || irq->irq >= 256) |
2189 | return -EINVAL; | |
bccf2150 | 2190 | vcpu_load(vcpu); |
6aa8b732 AK |
2191 | |
2192 | set_bit(irq->irq, vcpu->irq_pending); | |
2193 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2194 | ||
2195 | vcpu_put(vcpu); | |
2196 | ||
2197 | return 0; | |
2198 | } | |
2199 | ||
bccf2150 AK |
2200 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2201 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2202 | { |
6aa8b732 AK |
2203 | int r; |
2204 | ||
bccf2150 | 2205 | vcpu_load(vcpu); |
6aa8b732 AK |
2206 | |
2207 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
2208 | ||
2209 | vcpu_put(vcpu); | |
2210 | ||
2211 | return r; | |
2212 | } | |
2213 | ||
9a2bb7f4 AK |
2214 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2215 | unsigned long address, | |
2216 | int *type) | |
2217 | { | |
2218 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2219 | unsigned long pgoff; | |
2220 | struct page *page; | |
2221 | ||
2222 | *type = VM_FAULT_MINOR; | |
2223 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
039576c0 AK |
2224 | if (pgoff == 0) |
2225 | page = virt_to_page(vcpu->run); | |
2226 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2227 | page = virt_to_page(vcpu->pio_data); | |
2228 | else | |
9a2bb7f4 | 2229 | return NOPAGE_SIGBUS; |
9a2bb7f4 AK |
2230 | get_page(page); |
2231 | return page; | |
2232 | } | |
2233 | ||
2234 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2235 | .nopage = kvm_vcpu_nopage, | |
2236 | }; | |
2237 | ||
2238 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2239 | { | |
2240 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2241 | return 0; | |
2242 | } | |
2243 | ||
bccf2150 AK |
2244 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2245 | { | |
2246 | struct kvm_vcpu *vcpu = filp->private_data; | |
2247 | ||
2248 | fput(vcpu->kvm->filp); | |
2249 | return 0; | |
2250 | } | |
2251 | ||
2252 | static struct file_operations kvm_vcpu_fops = { | |
2253 | .release = kvm_vcpu_release, | |
2254 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2255 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2256 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2257 | }; |
2258 | ||
2259 | /* | |
2260 | * Allocates an inode for the vcpu. | |
2261 | */ | |
2262 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2263 | { | |
2264 | int fd, r; | |
2265 | struct inode *inode; | |
2266 | struct file *file; | |
2267 | ||
2268 | atomic_inc(&vcpu->kvm->filp->f_count); | |
2269 | inode = kvmfs_inode(&kvm_vcpu_fops); | |
2270 | if (IS_ERR(inode)) { | |
2271 | r = PTR_ERR(inode); | |
2272 | goto out1; | |
2273 | } | |
2274 | ||
2275 | file = kvmfs_file(inode, vcpu); | |
2276 | if (IS_ERR(file)) { | |
2277 | r = PTR_ERR(file); | |
2278 | goto out2; | |
2279 | } | |
2280 | ||
2281 | r = get_unused_fd(); | |
2282 | if (r < 0) | |
2283 | goto out3; | |
2284 | fd = r; | |
2285 | fd_install(fd, file); | |
2286 | ||
2287 | return fd; | |
2288 | ||
2289 | out3: | |
2290 | fput(file); | |
2291 | out2: | |
2292 | iput(inode); | |
2293 | out1: | |
2294 | fput(vcpu->kvm->filp); | |
2295 | return r; | |
2296 | } | |
2297 | ||
c5ea7660 AK |
2298 | /* |
2299 | * Creates some virtual cpus. Good luck creating more than one. | |
2300 | */ | |
2301 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2302 | { | |
2303 | int r; | |
2304 | struct kvm_vcpu *vcpu; | |
9a2bb7f4 | 2305 | struct page *page; |
c5ea7660 AK |
2306 | |
2307 | r = -EINVAL; | |
2308 | if (!valid_vcpu(n)) | |
2309 | goto out; | |
2310 | ||
2311 | vcpu = &kvm->vcpus[n]; | |
2312 | ||
2313 | mutex_lock(&vcpu->mutex); | |
2314 | ||
2315 | if (vcpu->vmcs) { | |
2316 | mutex_unlock(&vcpu->mutex); | |
2317 | return -EEXIST; | |
2318 | } | |
2319 | ||
9a2bb7f4 AK |
2320 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2321 | r = -ENOMEM; | |
2322 | if (!page) | |
2323 | goto out_unlock; | |
2324 | vcpu->run = page_address(page); | |
2325 | ||
039576c0 AK |
2326 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2327 | r = -ENOMEM; | |
2328 | if (!page) | |
2329 | goto out_free_run; | |
2330 | vcpu->pio_data = page_address(page); | |
2331 | ||
c5ea7660 AK |
2332 | vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf, |
2333 | FX_IMAGE_ALIGN); | |
2334 | vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE; | |
d917a6b9 | 2335 | vcpu->cr0 = 0x10; |
c5ea7660 AK |
2336 | |
2337 | r = kvm_arch_ops->vcpu_create(vcpu); | |
2338 | if (r < 0) | |
2339 | goto out_free_vcpus; | |
2340 | ||
2341 | r = kvm_mmu_create(vcpu); | |
2342 | if (r < 0) | |
2343 | goto out_free_vcpus; | |
2344 | ||
2345 | kvm_arch_ops->vcpu_load(vcpu); | |
2346 | r = kvm_mmu_setup(vcpu); | |
2347 | if (r >= 0) | |
2348 | r = kvm_arch_ops->vcpu_setup(vcpu); | |
2349 | vcpu_put(vcpu); | |
2350 | ||
2351 | if (r < 0) | |
2352 | goto out_free_vcpus; | |
2353 | ||
bccf2150 AK |
2354 | r = create_vcpu_fd(vcpu); |
2355 | if (r < 0) | |
2356 | goto out_free_vcpus; | |
2357 | ||
2358 | return r; | |
c5ea7660 AK |
2359 | |
2360 | out_free_vcpus: | |
2361 | kvm_free_vcpu(vcpu); | |
039576c0 AK |
2362 | out_free_run: |
2363 | free_page((unsigned long)vcpu->run); | |
2364 | vcpu->run = NULL; | |
9a2bb7f4 | 2365 | out_unlock: |
c5ea7660 AK |
2366 | mutex_unlock(&vcpu->mutex); |
2367 | out: | |
2368 | return r; | |
2369 | } | |
2370 | ||
06465c5a AK |
2371 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2372 | struct kvm_cpuid *cpuid, | |
2373 | struct kvm_cpuid_entry __user *entries) | |
2374 | { | |
2375 | int r; | |
2376 | ||
2377 | r = -E2BIG; | |
2378 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2379 | goto out; | |
2380 | r = -EFAULT; | |
2381 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2382 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2383 | goto out; | |
2384 | vcpu->cpuid_nent = cpuid->nent; | |
2385 | return 0; | |
2386 | ||
2387 | out: | |
2388 | return r; | |
2389 | } | |
2390 | ||
1961d276 AK |
2391 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2392 | { | |
2393 | if (sigset) { | |
2394 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2395 | vcpu->sigset_active = 1; | |
2396 | vcpu->sigset = *sigset; | |
2397 | } else | |
2398 | vcpu->sigset_active = 0; | |
2399 | return 0; | |
2400 | } | |
2401 | ||
b8836737 AK |
2402 | /* |
2403 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2404 | * we have asm/x86/processor.h | |
2405 | */ | |
2406 | struct fxsave { | |
2407 | u16 cwd; | |
2408 | u16 swd; | |
2409 | u16 twd; | |
2410 | u16 fop; | |
2411 | u64 rip; | |
2412 | u64 rdp; | |
2413 | u32 mxcsr; | |
2414 | u32 mxcsr_mask; | |
2415 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2416 | #ifdef CONFIG_X86_64 | |
2417 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2418 | #else | |
2419 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2420 | #endif | |
2421 | }; | |
2422 | ||
2423 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2424 | { | |
2425 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2426 | ||
2427 | vcpu_load(vcpu); | |
2428 | ||
2429 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2430 | fpu->fcw = fxsave->cwd; | |
2431 | fpu->fsw = fxsave->swd; | |
2432 | fpu->ftwx = fxsave->twd; | |
2433 | fpu->last_opcode = fxsave->fop; | |
2434 | fpu->last_ip = fxsave->rip; | |
2435 | fpu->last_dp = fxsave->rdp; | |
2436 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2437 | ||
2438 | vcpu_put(vcpu); | |
2439 | ||
2440 | return 0; | |
2441 | } | |
2442 | ||
2443 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2444 | { | |
2445 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2446 | ||
2447 | vcpu_load(vcpu); | |
2448 | ||
2449 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2450 | fxsave->cwd = fpu->fcw; | |
2451 | fxsave->swd = fpu->fsw; | |
2452 | fxsave->twd = fpu->ftwx; | |
2453 | fxsave->fop = fpu->last_opcode; | |
2454 | fxsave->rip = fpu->last_ip; | |
2455 | fxsave->rdp = fpu->last_dp; | |
2456 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2457 | ||
2458 | vcpu_put(vcpu); | |
2459 | ||
2460 | return 0; | |
2461 | } | |
2462 | ||
bccf2150 AK |
2463 | static long kvm_vcpu_ioctl(struct file *filp, |
2464 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2465 | { |
bccf2150 | 2466 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2467 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2468 | int r = -EINVAL; |
2469 | ||
2470 | switch (ioctl) { | |
9a2bb7f4 | 2471 | case KVM_RUN: |
f0fe5108 AK |
2472 | r = -EINVAL; |
2473 | if (arg) | |
2474 | goto out; | |
9a2bb7f4 | 2475 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2476 | break; |
6aa8b732 AK |
2477 | case KVM_GET_REGS: { |
2478 | struct kvm_regs kvm_regs; | |
2479 | ||
bccf2150 AK |
2480 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2481 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2482 | if (r) |
2483 | goto out; | |
2484 | r = -EFAULT; | |
2f366987 | 2485 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2486 | goto out; |
2487 | r = 0; | |
2488 | break; | |
2489 | } | |
2490 | case KVM_SET_REGS: { | |
2491 | struct kvm_regs kvm_regs; | |
2492 | ||
2493 | r = -EFAULT; | |
2f366987 | 2494 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2495 | goto out; |
bccf2150 | 2496 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2497 | if (r) |
2498 | goto out; | |
2499 | r = 0; | |
2500 | break; | |
2501 | } | |
2502 | case KVM_GET_SREGS: { | |
2503 | struct kvm_sregs kvm_sregs; | |
2504 | ||
bccf2150 AK |
2505 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2506 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2507 | if (r) |
2508 | goto out; | |
2509 | r = -EFAULT; | |
2f366987 | 2510 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2511 | goto out; |
2512 | r = 0; | |
2513 | break; | |
2514 | } | |
2515 | case KVM_SET_SREGS: { | |
2516 | struct kvm_sregs kvm_sregs; | |
2517 | ||
2518 | r = -EFAULT; | |
2f366987 | 2519 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2520 | goto out; |
bccf2150 | 2521 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2522 | if (r) |
2523 | goto out; | |
2524 | r = 0; | |
2525 | break; | |
2526 | } | |
2527 | case KVM_TRANSLATE: { | |
2528 | struct kvm_translation tr; | |
2529 | ||
2530 | r = -EFAULT; | |
2f366987 | 2531 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2532 | goto out; |
bccf2150 | 2533 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2534 | if (r) |
2535 | goto out; | |
2536 | r = -EFAULT; | |
2f366987 | 2537 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2538 | goto out; |
2539 | r = 0; | |
2540 | break; | |
2541 | } | |
2542 | case KVM_INTERRUPT: { | |
2543 | struct kvm_interrupt irq; | |
2544 | ||
2545 | r = -EFAULT; | |
2f366987 | 2546 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2547 | goto out; |
bccf2150 | 2548 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2549 | if (r) |
2550 | goto out; | |
2551 | r = 0; | |
2552 | break; | |
2553 | } | |
2554 | case KVM_DEBUG_GUEST: { | |
2555 | struct kvm_debug_guest dbg; | |
2556 | ||
2557 | r = -EFAULT; | |
2f366987 | 2558 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2559 | goto out; |
bccf2150 | 2560 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2561 | if (r) |
2562 | goto out; | |
2563 | r = 0; | |
2564 | break; | |
2565 | } | |
bccf2150 AK |
2566 | case KVM_GET_MSRS: |
2567 | r = msr_io(vcpu, argp, get_msr, 1); | |
2568 | break; | |
2569 | case KVM_SET_MSRS: | |
2570 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2571 | break; | |
06465c5a AK |
2572 | case KVM_SET_CPUID: { |
2573 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2574 | struct kvm_cpuid cpuid; | |
2575 | ||
2576 | r = -EFAULT; | |
2577 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2578 | goto out; | |
2579 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2580 | if (r) | |
2581 | goto out; | |
2582 | break; | |
2583 | } | |
1961d276 AK |
2584 | case KVM_SET_SIGNAL_MASK: { |
2585 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2586 | struct kvm_signal_mask kvm_sigmask; | |
2587 | sigset_t sigset, *p; | |
2588 | ||
2589 | p = NULL; | |
2590 | if (argp) { | |
2591 | r = -EFAULT; | |
2592 | if (copy_from_user(&kvm_sigmask, argp, | |
2593 | sizeof kvm_sigmask)) | |
2594 | goto out; | |
2595 | r = -EINVAL; | |
2596 | if (kvm_sigmask.len != sizeof sigset) | |
2597 | goto out; | |
2598 | r = -EFAULT; | |
2599 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2600 | sizeof sigset)) | |
2601 | goto out; | |
2602 | p = &sigset; | |
2603 | } | |
2604 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2605 | break; | |
2606 | } | |
b8836737 AK |
2607 | case KVM_GET_FPU: { |
2608 | struct kvm_fpu fpu; | |
2609 | ||
2610 | memset(&fpu, 0, sizeof fpu); | |
2611 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
2612 | if (r) | |
2613 | goto out; | |
2614 | r = -EFAULT; | |
2615 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
2616 | goto out; | |
2617 | r = 0; | |
2618 | break; | |
2619 | } | |
2620 | case KVM_SET_FPU: { | |
2621 | struct kvm_fpu fpu; | |
2622 | ||
2623 | r = -EFAULT; | |
2624 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
2625 | goto out; | |
2626 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
2627 | if (r) | |
2628 | goto out; | |
2629 | r = 0; | |
2630 | break; | |
2631 | } | |
bccf2150 AK |
2632 | default: |
2633 | ; | |
2634 | } | |
2635 | out: | |
2636 | return r; | |
2637 | } | |
2638 | ||
2639 | static long kvm_vm_ioctl(struct file *filp, | |
2640 | unsigned int ioctl, unsigned long arg) | |
2641 | { | |
2642 | struct kvm *kvm = filp->private_data; | |
2643 | void __user *argp = (void __user *)arg; | |
2644 | int r = -EINVAL; | |
2645 | ||
2646 | switch (ioctl) { | |
2647 | case KVM_CREATE_VCPU: | |
2648 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2649 | if (r < 0) | |
2650 | goto out; | |
2651 | break; | |
6aa8b732 AK |
2652 | case KVM_SET_MEMORY_REGION: { |
2653 | struct kvm_memory_region kvm_mem; | |
2654 | ||
2655 | r = -EFAULT; | |
2f366987 | 2656 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2657 | goto out; |
2c6f5df9 | 2658 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2659 | if (r) |
2660 | goto out; | |
2661 | break; | |
2662 | } | |
2663 | case KVM_GET_DIRTY_LOG: { | |
2664 | struct kvm_dirty_log log; | |
2665 | ||
2666 | r = -EFAULT; | |
2f366987 | 2667 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2668 | goto out; |
2c6f5df9 | 2669 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2670 | if (r) |
2671 | goto out; | |
2672 | break; | |
2673 | } | |
e8207547 AK |
2674 | case KVM_SET_MEMORY_ALIAS: { |
2675 | struct kvm_memory_alias alias; | |
2676 | ||
2677 | r = -EFAULT; | |
2678 | if (copy_from_user(&alias, argp, sizeof alias)) | |
2679 | goto out; | |
2680 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
2681 | if (r) | |
2682 | goto out; | |
2683 | break; | |
2684 | } | |
f17abe9a AK |
2685 | default: |
2686 | ; | |
2687 | } | |
2688 | out: | |
2689 | return r; | |
2690 | } | |
2691 | ||
2692 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2693 | unsigned long address, | |
2694 | int *type) | |
2695 | { | |
2696 | struct kvm *kvm = vma->vm_file->private_data; | |
2697 | unsigned long pgoff; | |
f17abe9a AK |
2698 | struct page *page; |
2699 | ||
2700 | *type = VM_FAULT_MINOR; | |
2701 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
954bbbc2 | 2702 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
2703 | if (!page) |
2704 | return NOPAGE_SIGBUS; | |
2705 | get_page(page); | |
2706 | return page; | |
2707 | } | |
2708 | ||
2709 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2710 | .nopage = kvm_vm_nopage, | |
2711 | }; | |
2712 | ||
2713 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2714 | { | |
2715 | vma->vm_ops = &kvm_vm_vm_ops; | |
2716 | return 0; | |
2717 | } | |
2718 | ||
2719 | static struct file_operations kvm_vm_fops = { | |
2720 | .release = kvm_vm_release, | |
2721 | .unlocked_ioctl = kvm_vm_ioctl, | |
2722 | .compat_ioctl = kvm_vm_ioctl, | |
2723 | .mmap = kvm_vm_mmap, | |
2724 | }; | |
2725 | ||
2726 | static int kvm_dev_ioctl_create_vm(void) | |
2727 | { | |
2728 | int fd, r; | |
2729 | struct inode *inode; | |
2730 | struct file *file; | |
2731 | struct kvm *kvm; | |
2732 | ||
2733 | inode = kvmfs_inode(&kvm_vm_fops); | |
2734 | if (IS_ERR(inode)) { | |
2735 | r = PTR_ERR(inode); | |
2736 | goto out1; | |
2737 | } | |
2738 | ||
2739 | kvm = kvm_create_vm(); | |
2740 | if (IS_ERR(kvm)) { | |
2741 | r = PTR_ERR(kvm); | |
2742 | goto out2; | |
2743 | } | |
2744 | ||
2745 | file = kvmfs_file(inode, kvm); | |
2746 | if (IS_ERR(file)) { | |
2747 | r = PTR_ERR(file); | |
2748 | goto out3; | |
2749 | } | |
bccf2150 | 2750 | kvm->filp = file; |
f17abe9a AK |
2751 | |
2752 | r = get_unused_fd(); | |
2753 | if (r < 0) | |
2754 | goto out4; | |
2755 | fd = r; | |
2756 | fd_install(fd, file); | |
2757 | ||
2758 | return fd; | |
2759 | ||
2760 | out4: | |
2761 | fput(file); | |
2762 | out3: | |
2763 | kvm_destroy_vm(kvm); | |
2764 | out2: | |
2765 | iput(inode); | |
2766 | out1: | |
2767 | return r; | |
2768 | } | |
2769 | ||
2770 | static long kvm_dev_ioctl(struct file *filp, | |
2771 | unsigned int ioctl, unsigned long arg) | |
2772 | { | |
2773 | void __user *argp = (void __user *)arg; | |
07c45a36 | 2774 | long r = -EINVAL; |
f17abe9a AK |
2775 | |
2776 | switch (ioctl) { | |
2777 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2778 | r = -EINVAL; |
2779 | if (arg) | |
2780 | goto out; | |
f17abe9a AK |
2781 | r = KVM_API_VERSION; |
2782 | break; | |
2783 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2784 | r = -EINVAL; |
2785 | if (arg) | |
2786 | goto out; | |
f17abe9a AK |
2787 | r = kvm_dev_ioctl_create_vm(); |
2788 | break; | |
6aa8b732 | 2789 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 2790 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
2791 | struct kvm_msr_list msr_list; |
2792 | unsigned n; | |
2793 | ||
2794 | r = -EFAULT; | |
2795 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2796 | goto out; | |
2797 | n = msr_list.nmsrs; | |
6f00e68f | 2798 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
2799 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2800 | goto out; | |
2801 | r = -E2BIG; | |
bf591b24 | 2802 | if (n < num_msrs_to_save) |
6aa8b732 AK |
2803 | goto out; |
2804 | r = -EFAULT; | |
2805 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 2806 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 2807 | goto out; |
6f00e68f AK |
2808 | if (copy_to_user(user_msr_list->indices |
2809 | + num_msrs_to_save * sizeof(u32), | |
2810 | &emulated_msrs, | |
2811 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2812 | goto out; | |
6aa8b732 | 2813 | r = 0; |
cc1d8955 | 2814 | break; |
6aa8b732 | 2815 | } |
5d308f45 AK |
2816 | case KVM_CHECK_EXTENSION: |
2817 | /* | |
2818 | * No extensions defined at present. | |
2819 | */ | |
2820 | r = 0; | |
2821 | break; | |
07c45a36 AK |
2822 | case KVM_GET_VCPU_MMAP_SIZE: |
2823 | r = -EINVAL; | |
2824 | if (arg) | |
2825 | goto out; | |
039576c0 | 2826 | r = 2 * PAGE_SIZE; |
07c45a36 | 2827 | break; |
6aa8b732 AK |
2828 | default: |
2829 | ; | |
2830 | } | |
2831 | out: | |
2832 | return r; | |
2833 | } | |
2834 | ||
6aa8b732 AK |
2835 | static struct file_operations kvm_chardev_ops = { |
2836 | .open = kvm_dev_open, | |
2837 | .release = kvm_dev_release, | |
2838 | .unlocked_ioctl = kvm_dev_ioctl, | |
2839 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2840 | }; |
2841 | ||
2842 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2843 | KVM_MINOR, |
6aa8b732 AK |
2844 | "kvm", |
2845 | &kvm_chardev_ops, | |
2846 | }; | |
2847 | ||
2848 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, | |
2849 | void *v) | |
2850 | { | |
2851 | if (val == SYS_RESTART) { | |
2852 | /* | |
2853 | * Some (well, at least mine) BIOSes hang on reboot if | |
2854 | * in vmx root mode. | |
2855 | */ | |
2856 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
8b6d44c7 | 2857 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 AK |
2858 | } |
2859 | return NOTIFY_OK; | |
2860 | } | |
2861 | ||
2862 | static struct notifier_block kvm_reboot_notifier = { | |
2863 | .notifier_call = kvm_reboot, | |
2864 | .priority = 0, | |
2865 | }; | |
2866 | ||
774c47f1 AK |
2867 | /* |
2868 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
2869 | * cached on it. | |
2870 | */ | |
2871 | static void decache_vcpus_on_cpu(int cpu) | |
2872 | { | |
2873 | struct kvm *vm; | |
2874 | struct kvm_vcpu *vcpu; | |
2875 | int i; | |
2876 | ||
2877 | spin_lock(&kvm_lock); | |
2878 | list_for_each_entry(vm, &vm_list, vm_list) | |
2879 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
2880 | vcpu = &vm->vcpus[i]; | |
2881 | /* | |
2882 | * If the vcpu is locked, then it is running on some | |
2883 | * other cpu and therefore it is not cached on the | |
2884 | * cpu in question. | |
2885 | * | |
2886 | * If it's not locked, check the last cpu it executed | |
2887 | * on. | |
2888 | */ | |
2889 | if (mutex_trylock(&vcpu->mutex)) { | |
2890 | if (vcpu->cpu == cpu) { | |
2891 | kvm_arch_ops->vcpu_decache(vcpu); | |
2892 | vcpu->cpu = -1; | |
2893 | } | |
2894 | mutex_unlock(&vcpu->mutex); | |
2895 | } | |
2896 | } | |
2897 | spin_unlock(&kvm_lock); | |
2898 | } | |
2899 | ||
2900 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, | |
2901 | void *v) | |
2902 | { | |
2903 | int cpu = (long)v; | |
2904 | ||
2905 | switch (val) { | |
43934a38 | 2906 | case CPU_DOWN_PREPARE: |
774c47f1 | 2907 | case CPU_UP_CANCELED: |
43934a38 JK |
2908 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2909 | cpu); | |
774c47f1 AK |
2910 | decache_vcpus_on_cpu(cpu); |
2911 | smp_call_function_single(cpu, kvm_arch_ops->hardware_disable, | |
2912 | NULL, 0, 1); | |
2913 | break; | |
43934a38 JK |
2914 | case CPU_ONLINE: |
2915 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2916 | cpu); | |
774c47f1 AK |
2917 | smp_call_function_single(cpu, kvm_arch_ops->hardware_enable, |
2918 | NULL, 0, 1); | |
2919 | break; | |
2920 | } | |
2921 | return NOTIFY_OK; | |
2922 | } | |
2923 | ||
2924 | static struct notifier_block kvm_cpu_notifier = { | |
2925 | .notifier_call = kvm_cpu_hotplug, | |
2926 | .priority = 20, /* must be > scheduler priority */ | |
2927 | }; | |
2928 | ||
6aa8b732 AK |
2929 | static __init void kvm_init_debug(void) |
2930 | { | |
2931 | struct kvm_stats_debugfs_item *p; | |
2932 | ||
8b6d44c7 | 2933 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 AK |
2934 | for (p = debugfs_entries; p->name; ++p) |
2935 | p->dentry = debugfs_create_u32(p->name, 0444, debugfs_dir, | |
2936 | p->data); | |
2937 | } | |
2938 | ||
2939 | static void kvm_exit_debug(void) | |
2940 | { | |
2941 | struct kvm_stats_debugfs_item *p; | |
2942 | ||
2943 | for (p = debugfs_entries; p->name; ++p) | |
2944 | debugfs_remove(p->dentry); | |
2945 | debugfs_remove(debugfs_dir); | |
2946 | } | |
2947 | ||
59ae6c6b AK |
2948 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2949 | { | |
2950 | decache_vcpus_on_cpu(raw_smp_processor_id()); | |
19d1408d | 2951 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
59ae6c6b AK |
2952 | return 0; |
2953 | } | |
2954 | ||
2955 | static int kvm_resume(struct sys_device *dev) | |
2956 | { | |
19d1408d | 2957 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
59ae6c6b AK |
2958 | return 0; |
2959 | } | |
2960 | ||
2961 | static struct sysdev_class kvm_sysdev_class = { | |
2962 | set_kset_name("kvm"), | |
2963 | .suspend = kvm_suspend, | |
2964 | .resume = kvm_resume, | |
2965 | }; | |
2966 | ||
2967 | static struct sys_device kvm_sysdev = { | |
2968 | .id = 0, | |
2969 | .cls = &kvm_sysdev_class, | |
2970 | }; | |
2971 | ||
6aa8b732 AK |
2972 | hpa_t bad_page_address; |
2973 | ||
37e29d90 AK |
2974 | static int kvmfs_get_sb(struct file_system_type *fs_type, int flags, |
2975 | const char *dev_name, void *data, struct vfsmount *mnt) | |
2976 | { | |
e9cdb1e3 | 2977 | return get_sb_pseudo(fs_type, "kvm:", NULL, KVMFS_SUPER_MAGIC, mnt); |
37e29d90 AK |
2978 | } |
2979 | ||
2980 | static struct file_system_type kvm_fs_type = { | |
2981 | .name = "kvmfs", | |
2982 | .get_sb = kvmfs_get_sb, | |
2983 | .kill_sb = kill_anon_super, | |
2984 | }; | |
2985 | ||
6aa8b732 AK |
2986 | int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module) |
2987 | { | |
2988 | int r; | |
2989 | ||
09db28b8 YI |
2990 | if (kvm_arch_ops) { |
2991 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
2992 | return -EEXIST; | |
2993 | } | |
2994 | ||
e097f35c | 2995 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
2996 | printk(KERN_ERR "kvm: no hardware support\n"); |
2997 | return -EOPNOTSUPP; | |
2998 | } | |
e097f35c | 2999 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3000 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3001 | return -EOPNOTSUPP; | |
3002 | } | |
3003 | ||
e097f35c YI |
3004 | kvm_arch_ops = ops; |
3005 | ||
6aa8b732 AK |
3006 | r = kvm_arch_ops->hardware_setup(); |
3007 | if (r < 0) | |
ca45aaae | 3008 | goto out; |
6aa8b732 | 3009 | |
8b6d44c7 | 3010 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3011 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3012 | if (r) | |
3013 | goto out_free_1; | |
6aa8b732 AK |
3014 | register_reboot_notifier(&kvm_reboot_notifier); |
3015 | ||
59ae6c6b AK |
3016 | r = sysdev_class_register(&kvm_sysdev_class); |
3017 | if (r) | |
3018 | goto out_free_2; | |
3019 | ||
3020 | r = sysdev_register(&kvm_sysdev); | |
3021 | if (r) | |
3022 | goto out_free_3; | |
3023 | ||
6aa8b732 AK |
3024 | kvm_chardev_ops.owner = module; |
3025 | ||
3026 | r = misc_register(&kvm_dev); | |
3027 | if (r) { | |
3028 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
3029 | goto out_free; | |
3030 | } | |
3031 | ||
3032 | return r; | |
3033 | ||
3034 | out_free: | |
59ae6c6b AK |
3035 | sysdev_unregister(&kvm_sysdev); |
3036 | out_free_3: | |
3037 | sysdev_class_unregister(&kvm_sysdev_class); | |
3038 | out_free_2: | |
6aa8b732 | 3039 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3040 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3041 | out_free_1: | |
8b6d44c7 | 3042 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 3043 | kvm_arch_ops->hardware_unsetup(); |
ca45aaae AK |
3044 | out: |
3045 | kvm_arch_ops = NULL; | |
6aa8b732 AK |
3046 | return r; |
3047 | } | |
3048 | ||
3049 | void kvm_exit_arch(void) | |
3050 | { | |
3051 | misc_deregister(&kvm_dev); | |
59ae6c6b AK |
3052 | sysdev_unregister(&kvm_sysdev); |
3053 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3054 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3055 | unregister_cpu_notifier(&kvm_cpu_notifier); |
8b6d44c7 | 3056 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 3057 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 3058 | kvm_arch_ops = NULL; |
6aa8b732 AK |
3059 | } |
3060 | ||
3061 | static __init int kvm_init(void) | |
3062 | { | |
3063 | static struct page *bad_page; | |
37e29d90 AK |
3064 | int r; |
3065 | ||
3066 | r = register_filesystem(&kvm_fs_type); | |
3067 | if (r) | |
3068 | goto out3; | |
6aa8b732 | 3069 | |
37e29d90 AK |
3070 | kvmfs_mnt = kern_mount(&kvm_fs_type); |
3071 | r = PTR_ERR(kvmfs_mnt); | |
3072 | if (IS_ERR(kvmfs_mnt)) | |
3073 | goto out2; | |
6aa8b732 AK |
3074 | kvm_init_debug(); |
3075 | ||
bf591b24 MR |
3076 | kvm_init_msr_list(); |
3077 | ||
6aa8b732 AK |
3078 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
3079 | r = -ENOMEM; | |
3080 | goto out; | |
3081 | } | |
3082 | ||
3083 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3084 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3085 | ||
58e690e6 | 3086 | return 0; |
6aa8b732 AK |
3087 | |
3088 | out: | |
3089 | kvm_exit_debug(); | |
37e29d90 AK |
3090 | mntput(kvmfs_mnt); |
3091 | out2: | |
3092 | unregister_filesystem(&kvm_fs_type); | |
3093 | out3: | |
6aa8b732 AK |
3094 | return r; |
3095 | } | |
3096 | ||
3097 | static __exit void kvm_exit(void) | |
3098 | { | |
3099 | kvm_exit_debug(); | |
3100 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
37e29d90 AK |
3101 | mntput(kvmfs_mnt); |
3102 | unregister_filesystem(&kvm_fs_type); | |
6aa8b732 AK |
3103 | } |
3104 | ||
3105 | module_init(kvm_init) | |
3106 | module_exit(kvm_exit) | |
3107 | ||
3108 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
3109 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |