]>
Commit | Line | Data |
---|---|---|
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> | |
23 | #include <asm/processor.h> | |
24 | #include <linux/percpu.h> | |
25 | #include <linux/gfp.h> | |
26 | #include <asm/msr.h> | |
27 | #include <linux/mm.h> | |
28 | #include <linux/miscdevice.h> | |
29 | #include <linux/vmalloc.h> | |
30 | #include <asm/uaccess.h> | |
31 | #include <linux/reboot.h> | |
32 | #include <asm/io.h> | |
33 | #include <linux/debugfs.h> | |
34 | #include <linux/highmem.h> | |
35 | #include <linux/file.h> | |
36 | #include <asm/desc.h> | |
59ae6c6b | 37 | #include <linux/sysdev.h> |
774c47f1 | 38 | #include <linux/cpu.h> |
f17abe9a | 39 | #include <linux/file.h> |
37e29d90 AK |
40 | #include <linux/fs.h> |
41 | #include <linux/mount.h> | |
6aa8b732 AK |
42 | |
43 | #include "x86_emulate.h" | |
44 | #include "segment_descriptor.h" | |
45 | ||
46 | MODULE_AUTHOR("Qumranet"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | ||
133de902 AK |
49 | static DEFINE_SPINLOCK(kvm_lock); |
50 | static LIST_HEAD(vm_list); | |
51 | ||
6aa8b732 AK |
52 | struct kvm_arch_ops *kvm_arch_ops; |
53 | struct kvm_stat kvm_stat; | |
54 | EXPORT_SYMBOL_GPL(kvm_stat); | |
55 | ||
56 | static struct kvm_stats_debugfs_item { | |
57 | const char *name; | |
58 | u32 *data; | |
59 | struct dentry *dentry; | |
60 | } debugfs_entries[] = { | |
61 | { "pf_fixed", &kvm_stat.pf_fixed }, | |
62 | { "pf_guest", &kvm_stat.pf_guest }, | |
63 | { "tlb_flush", &kvm_stat.tlb_flush }, | |
64 | { "invlpg", &kvm_stat.invlpg }, | |
65 | { "exits", &kvm_stat.exits }, | |
66 | { "io_exits", &kvm_stat.io_exits }, | |
67 | { "mmio_exits", &kvm_stat.mmio_exits }, | |
68 | { "signal_exits", &kvm_stat.signal_exits }, | |
c1150d8c DL |
69 | { "irq_window", &kvm_stat.irq_window_exits }, |
70 | { "halt_exits", &kvm_stat.halt_exits }, | |
71 | { "request_irq", &kvm_stat.request_irq_exits }, | |
6aa8b732 | 72 | { "irq_exits", &kvm_stat.irq_exits }, |
8b6d44c7 | 73 | { NULL, NULL } |
6aa8b732 AK |
74 | }; |
75 | ||
76 | static struct dentry *debugfs_dir; | |
77 | ||
37e29d90 AK |
78 | #define KVMFS_MAGIC 0x19700426 |
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 | ||
349 | static void kvm_free_vcpu(struct kvm_vcpu *vcpu) | |
350 | { | |
bccf2150 | 351 | if (!vcpu->vmcs) |
1e8ba6fb IM |
352 | return; |
353 | ||
bccf2150 | 354 | vcpu_load(vcpu); |
6aa8b732 | 355 | kvm_mmu_destroy(vcpu); |
08438475 | 356 | vcpu_put(vcpu); |
9ede74e0 | 357 | kvm_arch_ops->vcpu_free(vcpu); |
6aa8b732 AK |
358 | } |
359 | ||
360 | static void kvm_free_vcpus(struct kvm *kvm) | |
361 | { | |
362 | unsigned int i; | |
363 | ||
364 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
365 | kvm_free_vcpu(&kvm->vcpus[i]); | |
366 | } | |
367 | ||
368 | static int kvm_dev_release(struct inode *inode, struct file *filp) | |
369 | { | |
f17abe9a AK |
370 | return 0; |
371 | } | |
6aa8b732 | 372 | |
f17abe9a AK |
373 | static void kvm_destroy_vm(struct kvm *kvm) |
374 | { | |
133de902 AK |
375 | spin_lock(&kvm_lock); |
376 | list_del(&kvm->vm_list); | |
377 | spin_unlock(&kvm_lock); | |
6aa8b732 AK |
378 | kvm_free_vcpus(kvm); |
379 | kvm_free_physmem(kvm); | |
380 | kfree(kvm); | |
f17abe9a AK |
381 | } |
382 | ||
383 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
384 | { | |
385 | struct kvm *kvm = filp->private_data; | |
386 | ||
387 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
388 | return 0; |
389 | } | |
390 | ||
391 | static void inject_gp(struct kvm_vcpu *vcpu) | |
392 | { | |
393 | kvm_arch_ops->inject_gp(vcpu, 0); | |
394 | } | |
395 | ||
1342d353 AK |
396 | /* |
397 | * Load the pae pdptrs. Return true is they are all valid. | |
398 | */ | |
399 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
400 | { |
401 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 402 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 AK |
403 | int i; |
404 | u64 pdpte; | |
405 | u64 *pdpt; | |
1342d353 | 406 | int ret; |
6aa8b732 AK |
407 | struct kvm_memory_slot *memslot; |
408 | ||
409 | spin_lock(&vcpu->kvm->lock); | |
410 | memslot = gfn_to_memslot(vcpu->kvm, pdpt_gfn); | |
411 | /* FIXME: !memslot - emulate? 0xff? */ | |
412 | pdpt = kmap_atomic(gfn_to_page(memslot, pdpt_gfn), KM_USER0); | |
413 | ||
1342d353 | 414 | ret = 1; |
6aa8b732 AK |
415 | for (i = 0; i < 4; ++i) { |
416 | pdpte = pdpt[offset + i]; | |
1342d353 AK |
417 | if ((pdpte & 1) && (pdpte & 0xfffffff0000001e6ull)) { |
418 | ret = 0; | |
419 | goto out; | |
420 | } | |
6aa8b732 AK |
421 | } |
422 | ||
1342d353 AK |
423 | for (i = 0; i < 4; ++i) |
424 | vcpu->pdptrs[i] = pdpt[offset + i]; | |
425 | ||
426 | out: | |
6aa8b732 AK |
427 | kunmap_atomic(pdpt, KM_USER0); |
428 | spin_unlock(&vcpu->kvm->lock); | |
429 | ||
1342d353 | 430 | return ret; |
6aa8b732 AK |
431 | } |
432 | ||
433 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
434 | { | |
435 | if (cr0 & CR0_RESEVED_BITS) { | |
436 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
437 | cr0, vcpu->cr0); | |
438 | inject_gp(vcpu); | |
439 | return; | |
440 | } | |
441 | ||
442 | if ((cr0 & CR0_NW_MASK) && !(cr0 & CR0_CD_MASK)) { | |
443 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
444 | inject_gp(vcpu); | |
445 | return; | |
446 | } | |
447 | ||
448 | if ((cr0 & CR0_PG_MASK) && !(cr0 & CR0_PE_MASK)) { | |
449 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
450 | "and a clear PE flag\n"); | |
451 | inject_gp(vcpu); | |
452 | return; | |
453 | } | |
454 | ||
455 | if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) { | |
05b3e0c2 | 456 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
457 | if ((vcpu->shadow_efer & EFER_LME)) { |
458 | int cs_db, cs_l; | |
459 | ||
460 | if (!is_pae(vcpu)) { | |
461 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
462 | "in long mode while PAE is disabled\n"); | |
463 | inject_gp(vcpu); | |
464 | return; | |
465 | } | |
466 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
467 | if (cs_l) { | |
468 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
469 | "in long mode while CS.L == 1\n"); | |
470 | inject_gp(vcpu); | |
471 | return; | |
472 | ||
473 | } | |
474 | } else | |
475 | #endif | |
1342d353 | 476 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
477 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
478 | "reserved bits\n"); | |
479 | inject_gp(vcpu); | |
480 | return; | |
481 | } | |
482 | ||
483 | } | |
484 | ||
485 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
486 | vcpu->cr0 = cr0; | |
487 | ||
488 | spin_lock(&vcpu->kvm->lock); | |
489 | kvm_mmu_reset_context(vcpu); | |
490 | spin_unlock(&vcpu->kvm->lock); | |
491 | return; | |
492 | } | |
493 | EXPORT_SYMBOL_GPL(set_cr0); | |
494 | ||
495 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
496 | { | |
399badf3 | 497 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
6aa8b732 AK |
498 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); |
499 | } | |
500 | EXPORT_SYMBOL_GPL(lmsw); | |
501 | ||
502 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
503 | { | |
504 | if (cr4 & CR4_RESEVED_BITS) { | |
505 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
506 | inject_gp(vcpu); | |
507 | return; | |
508 | } | |
509 | ||
a9058ecd | 510 | if (is_long_mode(vcpu)) { |
6aa8b732 AK |
511 | if (!(cr4 & CR4_PAE_MASK)) { |
512 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
513 | "in long mode\n"); | |
514 | inject_gp(vcpu); | |
515 | return; | |
516 | } | |
517 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & CR4_PAE_MASK) | |
1342d353 | 518 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
519 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
520 | inject_gp(vcpu); | |
521 | } | |
522 | ||
523 | if (cr4 & CR4_VMXE_MASK) { | |
524 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
525 | inject_gp(vcpu); | |
526 | return; | |
527 | } | |
528 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
529 | spin_lock(&vcpu->kvm->lock); | |
530 | kvm_mmu_reset_context(vcpu); | |
531 | spin_unlock(&vcpu->kvm->lock); | |
532 | } | |
533 | EXPORT_SYMBOL_GPL(set_cr4); | |
534 | ||
535 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
536 | { | |
a9058ecd | 537 | if (is_long_mode(vcpu)) { |
d27d4aca | 538 | if (cr3 & CR3_L_MODE_RESEVED_BITS) { |
6aa8b732 AK |
539 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
540 | inject_gp(vcpu); | |
541 | return; | |
542 | } | |
543 | } else { | |
544 | if (cr3 & CR3_RESEVED_BITS) { | |
545 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
546 | inject_gp(vcpu); | |
547 | return; | |
548 | } | |
549 | if (is_paging(vcpu) && is_pae(vcpu) && | |
1342d353 | 550 | !load_pdptrs(vcpu, cr3)) { |
6aa8b732 AK |
551 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
552 | "reserved bits\n"); | |
553 | inject_gp(vcpu); | |
554 | return; | |
555 | } | |
556 | } | |
557 | ||
558 | vcpu->cr3 = cr3; | |
559 | spin_lock(&vcpu->kvm->lock); | |
d21225ee IM |
560 | /* |
561 | * Does the new cr3 value map to physical memory? (Note, we | |
562 | * catch an invalid cr3 even in real-mode, because it would | |
563 | * cause trouble later on when we turn on paging anyway.) | |
564 | * | |
565 | * A real CPU would silently accept an invalid cr3 and would | |
566 | * attempt to use it - with largely undefined (and often hard | |
567 | * to debug) behavior on the guest side. | |
568 | */ | |
569 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
570 | inject_gp(vcpu); | |
571 | else | |
572 | vcpu->mmu.new_cr3(vcpu); | |
6aa8b732 AK |
573 | spin_unlock(&vcpu->kvm->lock); |
574 | } | |
575 | EXPORT_SYMBOL_GPL(set_cr3); | |
576 | ||
577 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
578 | { | |
579 | if ( cr8 & CR8_RESEVED_BITS) { | |
580 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
581 | inject_gp(vcpu); | |
582 | return; | |
583 | } | |
584 | vcpu->cr8 = cr8; | |
585 | } | |
586 | EXPORT_SYMBOL_GPL(set_cr8); | |
587 | ||
588 | void fx_init(struct kvm_vcpu *vcpu) | |
589 | { | |
590 | struct __attribute__ ((__packed__)) fx_image_s { | |
591 | u16 control; //fcw | |
592 | u16 status; //fsw | |
593 | u16 tag; // ftw | |
594 | u16 opcode; //fop | |
595 | u64 ip; // fpu ip | |
596 | u64 operand;// fpu dp | |
597 | u32 mxcsr; | |
598 | u32 mxcsr_mask; | |
599 | ||
600 | } *fx_image; | |
601 | ||
602 | fx_save(vcpu->host_fx_image); | |
603 | fpu_init(); | |
604 | fx_save(vcpu->guest_fx_image); | |
605 | fx_restore(vcpu->host_fx_image); | |
606 | ||
607 | fx_image = (struct fx_image_s *)vcpu->guest_fx_image; | |
608 | fx_image->mxcsr = 0x1f80; | |
609 | memset(vcpu->guest_fx_image + sizeof(struct fx_image_s), | |
610 | 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s)); | |
611 | } | |
612 | EXPORT_SYMBOL_GPL(fx_init); | |
613 | ||
02b27c1f UL |
614 | static void do_remove_write_access(struct kvm_vcpu *vcpu, int slot) |
615 | { | |
616 | spin_lock(&vcpu->kvm->lock); | |
617 | kvm_mmu_slot_remove_write_access(vcpu, slot); | |
618 | spin_unlock(&vcpu->kvm->lock); | |
619 | } | |
620 | ||
6aa8b732 AK |
621 | /* |
622 | * Allocate some memory and give it an address in the guest physical address | |
623 | * space. | |
624 | * | |
625 | * Discontiguous memory is allowed, mostly for framebuffers. | |
626 | */ | |
2c6f5df9 AK |
627 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
628 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
629 | { |
630 | int r; | |
631 | gfn_t base_gfn; | |
632 | unsigned long npages; | |
633 | unsigned long i; | |
634 | struct kvm_memory_slot *memslot; | |
635 | struct kvm_memory_slot old, new; | |
636 | int memory_config_version; | |
637 | ||
638 | r = -EINVAL; | |
639 | /* General sanity checks */ | |
640 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
641 | goto out; | |
642 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
643 | goto out; | |
644 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
645 | goto out; | |
646 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
647 | goto out; | |
648 | ||
649 | memslot = &kvm->memslots[mem->slot]; | |
650 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
651 | npages = mem->memory_size >> PAGE_SHIFT; | |
652 | ||
653 | if (!npages) | |
654 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
655 | ||
656 | raced: | |
657 | spin_lock(&kvm->lock); | |
658 | ||
659 | memory_config_version = kvm->memory_config_version; | |
660 | new = old = *memslot; | |
661 | ||
662 | new.base_gfn = base_gfn; | |
663 | new.npages = npages; | |
664 | new.flags = mem->flags; | |
665 | ||
666 | /* Disallow changing a memory slot's size. */ | |
667 | r = -EINVAL; | |
668 | if (npages && old.npages && npages != old.npages) | |
669 | goto out_unlock; | |
670 | ||
671 | /* Check for overlaps */ | |
672 | r = -EEXIST; | |
673 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
674 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
675 | ||
676 | if (s == memslot) | |
677 | continue; | |
678 | if (!((base_gfn + npages <= s->base_gfn) || | |
679 | (base_gfn >= s->base_gfn + s->npages))) | |
680 | goto out_unlock; | |
681 | } | |
682 | /* | |
683 | * Do memory allocations outside lock. memory_config_version will | |
684 | * detect any races. | |
685 | */ | |
686 | spin_unlock(&kvm->lock); | |
687 | ||
688 | /* Deallocate if slot is being removed */ | |
689 | if (!npages) | |
8b6d44c7 | 690 | new.phys_mem = NULL; |
6aa8b732 AK |
691 | |
692 | /* Free page dirty bitmap if unneeded */ | |
693 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 694 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
695 | |
696 | r = -ENOMEM; | |
697 | ||
698 | /* Allocate if a slot is being created */ | |
699 | if (npages && !new.phys_mem) { | |
700 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
701 | ||
702 | if (!new.phys_mem) | |
703 | goto out_free; | |
704 | ||
705 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
706 | for (i = 0; i < npages; ++i) { | |
707 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
708 | | __GFP_ZERO); | |
709 | if (!new.phys_mem[i]) | |
710 | goto out_free; | |
5972e953 | 711 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
712 | } |
713 | } | |
714 | ||
715 | /* Allocate page dirty bitmap if needed */ | |
716 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
717 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
718 | ||
719 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
720 | if (!new.dirty_bitmap) | |
721 | goto out_free; | |
722 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
723 | } | |
724 | ||
725 | spin_lock(&kvm->lock); | |
726 | ||
727 | if (memory_config_version != kvm->memory_config_version) { | |
728 | spin_unlock(&kvm->lock); | |
729 | kvm_free_physmem_slot(&new, &old); | |
730 | goto raced; | |
731 | } | |
732 | ||
733 | r = -EAGAIN; | |
734 | if (kvm->busy) | |
735 | goto out_unlock; | |
736 | ||
737 | if (mem->slot >= kvm->nmemslots) | |
738 | kvm->nmemslots = mem->slot + 1; | |
739 | ||
740 | *memslot = new; | |
741 | ++kvm->memory_config_version; | |
742 | ||
743 | spin_unlock(&kvm->lock); | |
744 | ||
745 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
746 | struct kvm_vcpu *vcpu; | |
747 | ||
bccf2150 | 748 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
749 | if (!vcpu) |
750 | continue; | |
ff990d59 UL |
751 | if (new.flags & KVM_MEM_LOG_DIRTY_PAGES) |
752 | do_remove_write_access(vcpu, mem->slot); | |
6aa8b732 AK |
753 | kvm_mmu_reset_context(vcpu); |
754 | vcpu_put(vcpu); | |
755 | } | |
756 | ||
757 | kvm_free_physmem_slot(&old, &new); | |
758 | return 0; | |
759 | ||
760 | out_unlock: | |
761 | spin_unlock(&kvm->lock); | |
762 | out_free: | |
763 | kvm_free_physmem_slot(&new, &old); | |
764 | out: | |
765 | return r; | |
766 | } | |
767 | ||
768 | /* | |
769 | * Get (and clear) the dirty memory log for a memory slot. | |
770 | */ | |
2c6f5df9 AK |
771 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
772 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
773 | { |
774 | struct kvm_memory_slot *memslot; | |
775 | int r, i; | |
776 | int n; | |
714b93da | 777 | int cleared; |
6aa8b732 AK |
778 | unsigned long any = 0; |
779 | ||
780 | spin_lock(&kvm->lock); | |
781 | ||
782 | /* | |
783 | * Prevent changes to guest memory configuration even while the lock | |
784 | * is not taken. | |
785 | */ | |
786 | ++kvm->busy; | |
787 | spin_unlock(&kvm->lock); | |
788 | r = -EINVAL; | |
789 | if (log->slot >= KVM_MEMORY_SLOTS) | |
790 | goto out; | |
791 | ||
792 | memslot = &kvm->memslots[log->slot]; | |
793 | r = -ENOENT; | |
794 | if (!memslot->dirty_bitmap) | |
795 | goto out; | |
796 | ||
cd1a4a98 | 797 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 798 | |
cd1a4a98 | 799 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
800 | any = memslot->dirty_bitmap[i]; |
801 | ||
802 | r = -EFAULT; | |
803 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
804 | goto out; | |
805 | ||
6aa8b732 | 806 | if (any) { |
714b93da | 807 | cleared = 0; |
6aa8b732 | 808 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
bccf2150 | 809 | struct kvm_vcpu *vcpu; |
6aa8b732 | 810 | |
bccf2150 | 811 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
812 | if (!vcpu) |
813 | continue; | |
714b93da AK |
814 | if (!cleared) { |
815 | do_remove_write_access(vcpu, log->slot); | |
816 | memset(memslot->dirty_bitmap, 0, n); | |
817 | cleared = 1; | |
818 | } | |
6aa8b732 AK |
819 | kvm_arch_ops->tlb_flush(vcpu); |
820 | vcpu_put(vcpu); | |
821 | } | |
822 | } | |
823 | ||
824 | r = 0; | |
825 | ||
826 | out: | |
827 | spin_lock(&kvm->lock); | |
828 | --kvm->busy; | |
829 | spin_unlock(&kvm->lock); | |
830 | return r; | |
831 | } | |
832 | ||
833 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
834 | { | |
835 | int i; | |
836 | ||
837 | for (i = 0; i < kvm->nmemslots; ++i) { | |
838 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
839 | ||
840 | if (gfn >= memslot->base_gfn | |
841 | && gfn < memslot->base_gfn + memslot->npages) | |
842 | return memslot; | |
843 | } | |
8b6d44c7 | 844 | return NULL; |
6aa8b732 AK |
845 | } |
846 | EXPORT_SYMBOL_GPL(gfn_to_memslot); | |
847 | ||
848 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) | |
849 | { | |
850 | int i; | |
8b6d44c7 | 851 | struct kvm_memory_slot *memslot = NULL; |
6aa8b732 AK |
852 | unsigned long rel_gfn; |
853 | ||
854 | for (i = 0; i < kvm->nmemslots; ++i) { | |
855 | memslot = &kvm->memslots[i]; | |
856 | ||
857 | if (gfn >= memslot->base_gfn | |
858 | && gfn < memslot->base_gfn + memslot->npages) { | |
859 | ||
860 | if (!memslot || !memslot->dirty_bitmap) | |
861 | return; | |
862 | ||
863 | rel_gfn = gfn - memslot->base_gfn; | |
864 | ||
865 | /* avoid RMW */ | |
866 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
867 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
868 | return; | |
869 | } | |
870 | } | |
871 | } | |
872 | ||
873 | static int emulator_read_std(unsigned long addr, | |
874 | unsigned long *val, | |
875 | unsigned int bytes, | |
876 | struct x86_emulate_ctxt *ctxt) | |
877 | { | |
878 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
879 | void *data = val; | |
880 | ||
881 | while (bytes) { | |
882 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
883 | unsigned offset = addr & (PAGE_SIZE-1); | |
884 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
885 | unsigned long pfn; | |
886 | struct kvm_memory_slot *memslot; | |
887 | void *page; | |
888 | ||
889 | if (gpa == UNMAPPED_GVA) | |
890 | return X86EMUL_PROPAGATE_FAULT; | |
891 | pfn = gpa >> PAGE_SHIFT; | |
892 | memslot = gfn_to_memslot(vcpu->kvm, pfn); | |
893 | if (!memslot) | |
894 | return X86EMUL_UNHANDLEABLE; | |
895 | page = kmap_atomic(gfn_to_page(memslot, pfn), KM_USER0); | |
896 | ||
897 | memcpy(data, page + offset, tocopy); | |
898 | ||
899 | kunmap_atomic(page, KM_USER0); | |
900 | ||
901 | bytes -= tocopy; | |
902 | data += tocopy; | |
903 | addr += tocopy; | |
904 | } | |
905 | ||
906 | return X86EMUL_CONTINUE; | |
907 | } | |
908 | ||
909 | static int emulator_write_std(unsigned long addr, | |
910 | unsigned long val, | |
911 | unsigned int bytes, | |
912 | struct x86_emulate_ctxt *ctxt) | |
913 | { | |
914 | printk(KERN_ERR "emulator_write_std: addr %lx n %d\n", | |
915 | addr, bytes); | |
916 | return X86EMUL_UNHANDLEABLE; | |
917 | } | |
918 | ||
919 | static int emulator_read_emulated(unsigned long addr, | |
920 | unsigned long *val, | |
921 | unsigned int bytes, | |
922 | struct x86_emulate_ctxt *ctxt) | |
923 | { | |
924 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
925 | ||
926 | if (vcpu->mmio_read_completed) { | |
927 | memcpy(val, vcpu->mmio_data, bytes); | |
928 | vcpu->mmio_read_completed = 0; | |
929 | return X86EMUL_CONTINUE; | |
930 | } else if (emulator_read_std(addr, val, bytes, ctxt) | |
931 | == X86EMUL_CONTINUE) | |
932 | return X86EMUL_CONTINUE; | |
933 | else { | |
934 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
d27d4aca | 935 | |
6aa8b732 | 936 | if (gpa == UNMAPPED_GVA) |
d27d4aca | 937 | return X86EMUL_PROPAGATE_FAULT; |
6aa8b732 AK |
938 | vcpu->mmio_needed = 1; |
939 | vcpu->mmio_phys_addr = gpa; | |
940 | vcpu->mmio_size = bytes; | |
941 | vcpu->mmio_is_write = 0; | |
942 | ||
943 | return X86EMUL_UNHANDLEABLE; | |
944 | } | |
945 | } | |
946 | ||
da4a00f0 AK |
947 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
948 | unsigned long val, int bytes) | |
949 | { | |
950 | struct kvm_memory_slot *m; | |
951 | struct page *page; | |
952 | void *virt; | |
953 | ||
954 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
955 | return 0; | |
956 | m = gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT); | |
957 | if (!m) | |
958 | return 0; | |
959 | page = gfn_to_page(m, gpa >> PAGE_SHIFT); | |
960 | kvm_mmu_pre_write(vcpu, gpa, bytes); | |
ab51a434 | 961 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 AK |
962 | virt = kmap_atomic(page, KM_USER0); |
963 | memcpy(virt + offset_in_page(gpa), &val, bytes); | |
964 | kunmap_atomic(virt, KM_USER0); | |
965 | kvm_mmu_post_write(vcpu, gpa, bytes); | |
966 | return 1; | |
967 | } | |
968 | ||
6aa8b732 AK |
969 | static int emulator_write_emulated(unsigned long addr, |
970 | unsigned long val, | |
971 | unsigned int bytes, | |
972 | struct x86_emulate_ctxt *ctxt) | |
973 | { | |
974 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
975 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
976 | ||
977 | if (gpa == UNMAPPED_GVA) | |
978 | return X86EMUL_PROPAGATE_FAULT; | |
979 | ||
da4a00f0 AK |
980 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
981 | return X86EMUL_CONTINUE; | |
982 | ||
6aa8b732 AK |
983 | vcpu->mmio_needed = 1; |
984 | vcpu->mmio_phys_addr = gpa; | |
985 | vcpu->mmio_size = bytes; | |
986 | vcpu->mmio_is_write = 1; | |
987 | memcpy(vcpu->mmio_data, &val, bytes); | |
988 | ||
989 | return X86EMUL_CONTINUE; | |
990 | } | |
991 | ||
992 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
993 | unsigned long old, | |
994 | unsigned long new, | |
995 | unsigned int bytes, | |
996 | struct x86_emulate_ctxt *ctxt) | |
997 | { | |
998 | static int reported; | |
999 | ||
1000 | if (!reported) { | |
1001 | reported = 1; | |
1002 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1003 | } | |
1004 | return emulator_write_emulated(addr, new, bytes, ctxt); | |
1005 | } | |
1006 | ||
32b35627 AK |
1007 | #ifdef CONFIG_X86_32 |
1008 | ||
1009 | static int emulator_cmpxchg8b_emulated(unsigned long addr, | |
1010 | unsigned long old_lo, | |
1011 | unsigned long old_hi, | |
1012 | unsigned long new_lo, | |
1013 | unsigned long new_hi, | |
1014 | struct x86_emulate_ctxt *ctxt) | |
1015 | { | |
1016 | static int reported; | |
1017 | int r; | |
1018 | ||
1019 | if (!reported) { | |
1020 | reported = 1; | |
1021 | printk(KERN_WARNING "kvm: emulating exchange8b as write\n"); | |
1022 | } | |
1023 | r = emulator_write_emulated(addr, new_lo, 4, ctxt); | |
1024 | if (r != X86EMUL_CONTINUE) | |
1025 | return r; | |
1026 | return emulator_write_emulated(addr+4, new_hi, 4, ctxt); | |
1027 | } | |
1028 | ||
1029 | #endif | |
1030 | ||
6aa8b732 AK |
1031 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) |
1032 | { | |
1033 | return kvm_arch_ops->get_segment_base(vcpu, seg); | |
1034 | } | |
1035 | ||
1036 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1037 | { | |
6aa8b732 AK |
1038 | return X86EMUL_CONTINUE; |
1039 | } | |
1040 | ||
1041 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1042 | { | |
399badf3 | 1043 | unsigned long cr0; |
6aa8b732 | 1044 | |
399badf3 AK |
1045 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
1046 | cr0 = vcpu->cr0 & ~CR0_TS_MASK; | |
6aa8b732 AK |
1047 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1048 | return X86EMUL_CONTINUE; | |
1049 | } | |
1050 | ||
1051 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1052 | { | |
1053 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1054 | ||
1055 | switch (dr) { | |
1056 | case 0 ... 3: | |
1057 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1058 | return X86EMUL_CONTINUE; | |
1059 | default: | |
1060 | printk(KERN_DEBUG "%s: unexpected dr %u\n", | |
1061 | __FUNCTION__, dr); | |
1062 | return X86EMUL_UNHANDLEABLE; | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1067 | { | |
1068 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1069 | int exception; | |
1070 | ||
1071 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1072 | if (exception) { | |
1073 | /* FIXME: better handling */ | |
1074 | return X86EMUL_UNHANDLEABLE; | |
1075 | } | |
1076 | return X86EMUL_CONTINUE; | |
1077 | } | |
1078 | ||
1079 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1080 | { | |
1081 | static int reported; | |
1082 | u8 opcodes[4]; | |
1083 | unsigned long rip = ctxt->vcpu->rip; | |
1084 | unsigned long rip_linear; | |
1085 | ||
1086 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1087 | ||
1088 | if (reported) | |
1089 | return; | |
1090 | ||
1091 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt); | |
1092 | ||
1093 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1094 | " rip %lx %02x %02x %02x %02x\n", | |
1095 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1096 | reported = 1; | |
1097 | } | |
1098 | ||
1099 | struct x86_emulate_ops emulate_ops = { | |
1100 | .read_std = emulator_read_std, | |
1101 | .write_std = emulator_write_std, | |
1102 | .read_emulated = emulator_read_emulated, | |
1103 | .write_emulated = emulator_write_emulated, | |
1104 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
32b35627 AK |
1105 | #ifdef CONFIG_X86_32 |
1106 | .cmpxchg8b_emulated = emulator_cmpxchg8b_emulated, | |
1107 | #endif | |
6aa8b732 AK |
1108 | }; |
1109 | ||
1110 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1111 | struct kvm_run *run, | |
1112 | unsigned long cr2, | |
1113 | u16 error_code) | |
1114 | { | |
1115 | struct x86_emulate_ctxt emulate_ctxt; | |
1116 | int r; | |
1117 | int cs_db, cs_l; | |
1118 | ||
1119 | kvm_arch_ops->cache_regs(vcpu); | |
1120 | ||
1121 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1122 | ||
1123 | emulate_ctxt.vcpu = vcpu; | |
1124 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1125 | emulate_ctxt.cr2 = cr2; | |
1126 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1127 | ? X86EMUL_MODE_REAL : cs_l | |
1128 | ? X86EMUL_MODE_PROT64 : cs_db | |
1129 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1130 | ||
1131 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1132 | emulate_ctxt.cs_base = 0; | |
1133 | emulate_ctxt.ds_base = 0; | |
1134 | emulate_ctxt.es_base = 0; | |
1135 | emulate_ctxt.ss_base = 0; | |
1136 | } else { | |
1137 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1138 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1139 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1140 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1141 | } | |
1142 | ||
1143 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1144 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1145 | ||
1146 | vcpu->mmio_is_write = 0; | |
1147 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); | |
1148 | ||
1149 | if ((r || vcpu->mmio_is_write) && run) { | |
1150 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
1151 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1152 | run->mmio.len = vcpu->mmio_size; | |
1153 | run->mmio.is_write = vcpu->mmio_is_write; | |
1154 | } | |
1155 | ||
1156 | if (r) { | |
a436036b AK |
1157 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1158 | return EMULATE_DONE; | |
6aa8b732 AK |
1159 | if (!vcpu->mmio_needed) { |
1160 | report_emulation_failure(&emulate_ctxt); | |
1161 | return EMULATE_FAIL; | |
1162 | } | |
1163 | return EMULATE_DO_MMIO; | |
1164 | } | |
1165 | ||
1166 | kvm_arch_ops->decache_regs(vcpu); | |
1167 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1168 | ||
1169 | if (vcpu->mmio_is_write) | |
1170 | return EMULATE_DO_MMIO; | |
1171 | ||
1172 | return EMULATE_DONE; | |
1173 | } | |
1174 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1175 | ||
270fd9b9 AK |
1176 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1177 | { | |
1178 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1179 | ||
1180 | kvm_arch_ops->decache_regs(vcpu); | |
1181 | ret = -KVM_EINVAL; | |
1182 | #ifdef CONFIG_X86_64 | |
1183 | if (is_long_mode(vcpu)) { | |
1184 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1185 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1186 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1187 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1188 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1189 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1190 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1191 | } else | |
1192 | #endif | |
1193 | { | |
1194 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1195 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1196 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1197 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1198 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1199 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1200 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1201 | } | |
1202 | switch (nr) { | |
1203 | default: | |
1204 | ; | |
1205 | } | |
1206 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
1207 | kvm_arch_ops->cache_regs(vcpu); | |
1208 | return 1; | |
1209 | } | |
1210 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1211 | ||
6aa8b732 AK |
1212 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1213 | { | |
1214 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1215 | } | |
1216 | ||
1217 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1218 | { | |
1219 | struct descriptor_table dt = { limit, base }; | |
1220 | ||
1221 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1222 | } | |
1223 | ||
1224 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1225 | { | |
1226 | struct descriptor_table dt = { limit, base }; | |
1227 | ||
1228 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1229 | } | |
1230 | ||
1231 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1232 | unsigned long *rflags) | |
1233 | { | |
1234 | lmsw(vcpu, msw); | |
1235 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1236 | } | |
1237 | ||
1238 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1239 | { | |
399badf3 | 1240 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1241 | switch (cr) { |
1242 | case 0: | |
1243 | return vcpu->cr0; | |
1244 | case 2: | |
1245 | return vcpu->cr2; | |
1246 | case 3: | |
1247 | return vcpu->cr3; | |
1248 | case 4: | |
1249 | return vcpu->cr4; | |
1250 | default: | |
1251 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1252 | return 0; | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1257 | unsigned long *rflags) | |
1258 | { | |
1259 | switch (cr) { | |
1260 | case 0: | |
1261 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1262 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1263 | break; | |
1264 | case 2: | |
1265 | vcpu->cr2 = val; | |
1266 | break; | |
1267 | case 3: | |
1268 | set_cr3(vcpu, val); | |
1269 | break; | |
1270 | case 4: | |
1271 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1272 | break; | |
1273 | default: | |
1274 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1275 | } | |
1276 | } | |
1277 | ||
102d8325 IM |
1278 | /* |
1279 | * Register the para guest with the host: | |
1280 | */ | |
1281 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1282 | { | |
1283 | struct kvm_vcpu_para_state *para_state; | |
1284 | hpa_t para_state_hpa, hypercall_hpa; | |
1285 | struct page *para_state_page; | |
1286 | unsigned char *hypercall; | |
1287 | gpa_t hypercall_gpa; | |
1288 | ||
1289 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1290 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1291 | ||
1292 | /* | |
1293 | * Needs to be page aligned: | |
1294 | */ | |
1295 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1296 | goto err_gp; | |
1297 | ||
1298 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1299 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1300 | if (is_error_hpa(para_state_hpa)) | |
1301 | goto err_gp; | |
1302 | ||
ab51a434 | 1303 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 IM |
1304 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
1305 | para_state = kmap_atomic(para_state_page, KM_USER0); | |
1306 | ||
1307 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1308 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1309 | ||
1310 | para_state->host_version = KVM_PARA_API_VERSION; | |
1311 | /* | |
1312 | * We cannot support guests that try to register themselves | |
1313 | * with a newer API version than the host supports: | |
1314 | */ | |
1315 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1316 | para_state->ret = -KVM_EINVAL; | |
1317 | goto err_kunmap_skip; | |
1318 | } | |
1319 | ||
1320 | hypercall_gpa = para_state->hypercall_gpa; | |
1321 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1322 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1323 | if (is_error_hpa(hypercall_hpa)) { | |
1324 | para_state->ret = -KVM_EINVAL; | |
1325 | goto err_kunmap_skip; | |
1326 | } | |
1327 | ||
1328 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1329 | vcpu->para_state_page = para_state_page; | |
1330 | vcpu->para_state_gpa = para_state_gpa; | |
1331 | vcpu->hypercall_gpa = hypercall_gpa; | |
1332 | ||
ab51a434 | 1333 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1334 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1335 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1336 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1337 | kunmap_atomic(hypercall, KM_USER1); | |
1338 | ||
1339 | para_state->ret = 0; | |
1340 | err_kunmap_skip: | |
1341 | kunmap_atomic(para_state, KM_USER0); | |
1342 | return 0; | |
1343 | err_gp: | |
1344 | return 1; | |
1345 | } | |
1346 | ||
3bab1f5d AK |
1347 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1348 | { | |
1349 | u64 data; | |
1350 | ||
1351 | switch (msr) { | |
1352 | case 0xc0010010: /* SYSCFG */ | |
1353 | case 0xc0010015: /* HWCR */ | |
1354 | case MSR_IA32_PLATFORM_ID: | |
1355 | case MSR_IA32_P5_MC_ADDR: | |
1356 | case MSR_IA32_P5_MC_TYPE: | |
1357 | case MSR_IA32_MC0_CTL: | |
1358 | case MSR_IA32_MCG_STATUS: | |
1359 | case MSR_IA32_MCG_CAP: | |
1360 | case MSR_IA32_MC0_MISC: | |
1361 | case MSR_IA32_MC0_MISC+4: | |
1362 | case MSR_IA32_MC0_MISC+8: | |
1363 | case MSR_IA32_MC0_MISC+12: | |
1364 | case MSR_IA32_MC0_MISC+16: | |
1365 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1366 | case MSR_IA32_PERF_STATUS: |
3bab1f5d AK |
1367 | /* MTRR registers */ |
1368 | case 0xfe: | |
1369 | case 0x200 ... 0x2ff: | |
1370 | data = 0; | |
1371 | break; | |
a8d13ea2 AK |
1372 | case 0xcd: /* fsb frequency */ |
1373 | data = 3; | |
1374 | break; | |
3bab1f5d AK |
1375 | case MSR_IA32_APICBASE: |
1376 | data = vcpu->apic_base; | |
1377 | break; | |
6f00e68f AK |
1378 | case MSR_IA32_MISC_ENABLE: |
1379 | data = vcpu->ia32_misc_enable_msr; | |
1380 | break; | |
3bab1f5d AK |
1381 | #ifdef CONFIG_X86_64 |
1382 | case MSR_EFER: | |
1383 | data = vcpu->shadow_efer; | |
1384 | break; | |
1385 | #endif | |
1386 | default: | |
1387 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr); | |
1388 | return 1; | |
1389 | } | |
1390 | *pdata = data; | |
1391 | return 0; | |
1392 | } | |
1393 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1394 | ||
6aa8b732 AK |
1395 | /* |
1396 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1397 | * Returns 0 on success, non-0 otherwise. | |
1398 | * Assumes vcpu_load() was already called. | |
1399 | */ | |
1400 | static int get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1401 | { | |
1402 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1403 | } | |
1404 | ||
05b3e0c2 | 1405 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1406 | |
3bab1f5d | 1407 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1408 | { |
6aa8b732 AK |
1409 | if (efer & EFER_RESERVED_BITS) { |
1410 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1411 | efer); | |
1412 | inject_gp(vcpu); | |
1413 | return; | |
1414 | } | |
1415 | ||
1416 | if (is_paging(vcpu) | |
1417 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1418 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1419 | inject_gp(vcpu); | |
1420 | return; | |
1421 | } | |
1422 | ||
7725f0ba AK |
1423 | kvm_arch_ops->set_efer(vcpu, efer); |
1424 | ||
6aa8b732 AK |
1425 | efer &= ~EFER_LMA; |
1426 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1427 | ||
1428 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1429 | } |
6aa8b732 AK |
1430 | |
1431 | #endif | |
1432 | ||
3bab1f5d AK |
1433 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1434 | { | |
1435 | switch (msr) { | |
1436 | #ifdef CONFIG_X86_64 | |
1437 | case MSR_EFER: | |
1438 | set_efer(vcpu, data); | |
1439 | break; | |
1440 | #endif | |
1441 | case MSR_IA32_MC0_STATUS: | |
1442 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
1443 | __FUNCTION__, data); | |
1444 | break; | |
1445 | case MSR_IA32_UCODE_REV: | |
1446 | case MSR_IA32_UCODE_WRITE: | |
1447 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1448 | break; | |
1449 | case MSR_IA32_APICBASE: | |
1450 | vcpu->apic_base = data; | |
1451 | break; | |
6f00e68f AK |
1452 | case MSR_IA32_MISC_ENABLE: |
1453 | vcpu->ia32_misc_enable_msr = data; | |
1454 | break; | |
102d8325 IM |
1455 | /* |
1456 | * This is the 'probe whether the host is KVM' logic: | |
1457 | */ | |
1458 | case MSR_KVM_API_MAGIC: | |
1459 | return vcpu_register_para(vcpu, data); | |
1460 | ||
3bab1f5d AK |
1461 | default: |
1462 | printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr); | |
1463 | return 1; | |
1464 | } | |
1465 | return 0; | |
1466 | } | |
1467 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1468 | ||
6aa8b732 AK |
1469 | /* |
1470 | * Writes msr value into into the appropriate "register". | |
1471 | * Returns 0 on success, non-0 otherwise. | |
1472 | * Assumes vcpu_load() was already called. | |
1473 | */ | |
1474 | static int set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1475 | { | |
1476 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1477 | } | |
1478 | ||
1479 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1480 | { | |
1481 | vcpu_put(vcpu); | |
1482 | cond_resched(); | |
bccf2150 | 1483 | vcpu_load(vcpu); |
6aa8b732 AK |
1484 | } |
1485 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1486 | ||
1487 | void load_msrs(struct vmx_msr_entry *e, int n) | |
1488 | { | |
1489 | int i; | |
1490 | ||
1491 | for (i = 0; i < n; ++i) | |
1492 | wrmsrl(e[i].index, e[i].data); | |
1493 | } | |
1494 | EXPORT_SYMBOL_GPL(load_msrs); | |
1495 | ||
1496 | void save_msrs(struct vmx_msr_entry *e, int n) | |
1497 | { | |
1498 | int i; | |
1499 | ||
1500 | for (i = 0; i < n; ++i) | |
1501 | rdmsrl(e[i].index, e[i].data); | |
1502 | } | |
1503 | EXPORT_SYMBOL_GPL(save_msrs); | |
1504 | ||
bccf2150 | 1505 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1506 | { |
6aa8b732 AK |
1507 | int r; |
1508 | ||
bccf2150 | 1509 | vcpu_load(vcpu); |
6aa8b732 | 1510 | |
54810342 DL |
1511 | /* re-sync apic's tpr */ |
1512 | vcpu->cr8 = kvm_run->cr8; | |
1513 | ||
6aa8b732 AK |
1514 | if (kvm_run->emulated) { |
1515 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1516 | kvm_run->emulated = 0; | |
1517 | } | |
1518 | ||
1519 | if (kvm_run->mmio_completed) { | |
1520 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
1521 | vcpu->mmio_read_completed = 1; | |
1522 | } | |
1523 | ||
1524 | vcpu->mmio_needed = 0; | |
1525 | ||
1526 | r = kvm_arch_ops->run(vcpu, kvm_run); | |
1527 | ||
1528 | vcpu_put(vcpu); | |
1529 | return r; | |
1530 | } | |
1531 | ||
bccf2150 AK |
1532 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
1533 | struct kvm_regs *regs) | |
6aa8b732 | 1534 | { |
bccf2150 | 1535 | vcpu_load(vcpu); |
6aa8b732 AK |
1536 | |
1537 | kvm_arch_ops->cache_regs(vcpu); | |
1538 | ||
1539 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
1540 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
1541 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
1542 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
1543 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
1544 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
1545 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
1546 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 1547 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1548 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
1549 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
1550 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
1551 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
1552 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
1553 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
1554 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
1555 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
1556 | #endif | |
1557 | ||
1558 | regs->rip = vcpu->rip; | |
1559 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
1560 | ||
1561 | /* | |
1562 | * Don't leak debug flags in case they were set for guest debugging | |
1563 | */ | |
1564 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
1565 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1566 | ||
1567 | vcpu_put(vcpu); | |
1568 | ||
1569 | return 0; | |
1570 | } | |
1571 | ||
bccf2150 AK |
1572 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
1573 | struct kvm_regs *regs) | |
6aa8b732 | 1574 | { |
bccf2150 | 1575 | vcpu_load(vcpu); |
6aa8b732 AK |
1576 | |
1577 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
1578 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
1579 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
1580 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
1581 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
1582 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
1583 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
1584 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 1585 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1586 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
1587 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
1588 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
1589 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
1590 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
1591 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
1592 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
1593 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
1594 | #endif | |
1595 | ||
1596 | vcpu->rip = regs->rip; | |
1597 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
1598 | ||
1599 | kvm_arch_ops->decache_regs(vcpu); | |
1600 | ||
1601 | vcpu_put(vcpu); | |
1602 | ||
1603 | return 0; | |
1604 | } | |
1605 | ||
1606 | static void get_segment(struct kvm_vcpu *vcpu, | |
1607 | struct kvm_segment *var, int seg) | |
1608 | { | |
1609 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
1610 | } | |
1611 | ||
bccf2150 AK |
1612 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
1613 | struct kvm_sregs *sregs) | |
6aa8b732 | 1614 | { |
6aa8b732 AK |
1615 | struct descriptor_table dt; |
1616 | ||
bccf2150 | 1617 | vcpu_load(vcpu); |
6aa8b732 AK |
1618 | |
1619 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
1620 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
1621 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
1622 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
1623 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
1624 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
1625 | ||
1626 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
1627 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
1628 | ||
1629 | kvm_arch_ops->get_idt(vcpu, &dt); | |
1630 | sregs->idt.limit = dt.limit; | |
1631 | sregs->idt.base = dt.base; | |
1632 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
1633 | sregs->gdt.limit = dt.limit; | |
1634 | sregs->gdt.base = dt.base; | |
1635 | ||
399badf3 | 1636 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1637 | sregs->cr0 = vcpu->cr0; |
1638 | sregs->cr2 = vcpu->cr2; | |
1639 | sregs->cr3 = vcpu->cr3; | |
1640 | sregs->cr4 = vcpu->cr4; | |
1641 | sregs->cr8 = vcpu->cr8; | |
1642 | sregs->efer = vcpu->shadow_efer; | |
1643 | sregs->apic_base = vcpu->apic_base; | |
1644 | ||
1645 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
1646 | sizeof sregs->interrupt_bitmap); | |
1647 | ||
1648 | vcpu_put(vcpu); | |
1649 | ||
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | static void set_segment(struct kvm_vcpu *vcpu, | |
1654 | struct kvm_segment *var, int seg) | |
1655 | { | |
1656 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
1657 | } | |
1658 | ||
bccf2150 AK |
1659 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
1660 | struct kvm_sregs *sregs) | |
6aa8b732 | 1661 | { |
6aa8b732 AK |
1662 | int mmu_reset_needed = 0; |
1663 | int i; | |
1664 | struct descriptor_table dt; | |
1665 | ||
bccf2150 | 1666 | vcpu_load(vcpu); |
6aa8b732 AK |
1667 | |
1668 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
1669 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
1670 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
1671 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
1672 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
1673 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
1674 | ||
1675 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
1676 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
1677 | ||
1678 | dt.limit = sregs->idt.limit; | |
1679 | dt.base = sregs->idt.base; | |
1680 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1681 | dt.limit = sregs->gdt.limit; | |
1682 | dt.base = sregs->gdt.base; | |
1683 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1684 | ||
1685 | vcpu->cr2 = sregs->cr2; | |
1686 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
1687 | vcpu->cr3 = sregs->cr3; | |
1688 | ||
1689 | vcpu->cr8 = sregs->cr8; | |
1690 | ||
1691 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 1692 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1693 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
1694 | #endif | |
1695 | vcpu->apic_base = sregs->apic_base; | |
1696 | ||
399badf3 AK |
1697 | kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu); |
1698 | ||
6aa8b732 AK |
1699 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
1700 | kvm_arch_ops->set_cr0_no_modeswitch(vcpu, sregs->cr0); | |
1701 | ||
1702 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
1703 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
1704 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
1705 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
1706 | |
1707 | if (mmu_reset_needed) | |
1708 | kvm_mmu_reset_context(vcpu); | |
1709 | ||
1710 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
1711 | sizeof vcpu->irq_pending); | |
1712 | vcpu->irq_summary = 0; | |
1713 | for (i = 0; i < NR_IRQ_WORDS; ++i) | |
1714 | if (vcpu->irq_pending[i]) | |
1715 | __set_bit(i, &vcpu->irq_summary); | |
1716 | ||
1717 | vcpu_put(vcpu); | |
1718 | ||
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
1724 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
1725 | * |
1726 | * This list is modified at module load time to reflect the | |
1727 | * capabilities of the host cpu. | |
6aa8b732 AK |
1728 | */ |
1729 | static u32 msrs_to_save[] = { | |
1730 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
1731 | MSR_K6_STAR, | |
05b3e0c2 | 1732 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1733 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
1734 | #endif | |
1735 | MSR_IA32_TIME_STAMP_COUNTER, | |
1736 | }; | |
1737 | ||
bf591b24 MR |
1738 | static unsigned num_msrs_to_save; |
1739 | ||
6f00e68f AK |
1740 | static u32 emulated_msrs[] = { |
1741 | MSR_IA32_MISC_ENABLE, | |
1742 | }; | |
1743 | ||
bf591b24 MR |
1744 | static __init void kvm_init_msr_list(void) |
1745 | { | |
1746 | u32 dummy[2]; | |
1747 | unsigned i, j; | |
1748 | ||
1749 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
1750 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
1751 | continue; | |
1752 | if (j < i) | |
1753 | msrs_to_save[j] = msrs_to_save[i]; | |
1754 | j++; | |
1755 | } | |
1756 | num_msrs_to_save = j; | |
1757 | } | |
6aa8b732 AK |
1758 | |
1759 | /* | |
1760 | * Adapt set_msr() to msr_io()'s calling convention | |
1761 | */ | |
1762 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
1763 | { | |
1764 | return set_msr(vcpu, index, *data); | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1769 | * | |
1770 | * @return number of msrs set successfully. | |
1771 | */ | |
bccf2150 | 1772 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
1773 | struct kvm_msr_entry *entries, |
1774 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1775 | unsigned index, u64 *data)) | |
1776 | { | |
6aa8b732 AK |
1777 | int i; |
1778 | ||
bccf2150 | 1779 | vcpu_load(vcpu); |
6aa8b732 AK |
1780 | |
1781 | for (i = 0; i < msrs->nmsrs; ++i) | |
1782 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1783 | break; | |
1784 | ||
1785 | vcpu_put(vcpu); | |
1786 | ||
1787 | return i; | |
1788 | } | |
1789 | ||
1790 | /* | |
1791 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1792 | * | |
1793 | * @return number of msrs set successfully. | |
1794 | */ | |
bccf2150 | 1795 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
1796 | int (*do_msr)(struct kvm_vcpu *vcpu, |
1797 | unsigned index, u64 *data), | |
1798 | int writeback) | |
1799 | { | |
1800 | struct kvm_msrs msrs; | |
1801 | struct kvm_msr_entry *entries; | |
1802 | int r, n; | |
1803 | unsigned size; | |
1804 | ||
1805 | r = -EFAULT; | |
1806 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1807 | goto out; | |
1808 | ||
1809 | r = -E2BIG; | |
1810 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1811 | goto out; | |
1812 | ||
1813 | r = -ENOMEM; | |
1814 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
1815 | entries = vmalloc(size); | |
1816 | if (!entries) | |
1817 | goto out; | |
1818 | ||
1819 | r = -EFAULT; | |
1820 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1821 | goto out_free; | |
1822 | ||
bccf2150 | 1823 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
1824 | if (r < 0) |
1825 | goto out_free; | |
1826 | ||
1827 | r = -EFAULT; | |
1828 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1829 | goto out_free; | |
1830 | ||
1831 | r = n; | |
1832 | ||
1833 | out_free: | |
1834 | vfree(entries); | |
1835 | out: | |
1836 | return r; | |
1837 | } | |
1838 | ||
1839 | /* | |
1840 | * Translate a guest virtual address to a guest physical address. | |
1841 | */ | |
bccf2150 AK |
1842 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
1843 | struct kvm_translation *tr) | |
6aa8b732 AK |
1844 | { |
1845 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
1846 | gpa_t gpa; |
1847 | ||
bccf2150 AK |
1848 | vcpu_load(vcpu); |
1849 | spin_lock(&vcpu->kvm->lock); | |
6aa8b732 AK |
1850 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
1851 | tr->physical_address = gpa; | |
1852 | tr->valid = gpa != UNMAPPED_GVA; | |
1853 | tr->writeable = 1; | |
1854 | tr->usermode = 0; | |
bccf2150 | 1855 | spin_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
1856 | vcpu_put(vcpu); |
1857 | ||
1858 | return 0; | |
1859 | } | |
1860 | ||
bccf2150 AK |
1861 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1862 | struct kvm_interrupt *irq) | |
6aa8b732 | 1863 | { |
6aa8b732 AK |
1864 | if (irq->irq < 0 || irq->irq >= 256) |
1865 | return -EINVAL; | |
bccf2150 | 1866 | vcpu_load(vcpu); |
6aa8b732 AK |
1867 | |
1868 | set_bit(irq->irq, vcpu->irq_pending); | |
1869 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
1870 | ||
1871 | vcpu_put(vcpu); | |
1872 | ||
1873 | return 0; | |
1874 | } | |
1875 | ||
bccf2150 AK |
1876 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
1877 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 1878 | { |
6aa8b732 AK |
1879 | int r; |
1880 | ||
bccf2150 | 1881 | vcpu_load(vcpu); |
6aa8b732 AK |
1882 | |
1883 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
1884 | ||
1885 | vcpu_put(vcpu); | |
1886 | ||
1887 | return r; | |
1888 | } | |
1889 | ||
bccf2150 AK |
1890 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
1891 | { | |
1892 | struct kvm_vcpu *vcpu = filp->private_data; | |
1893 | ||
1894 | fput(vcpu->kvm->filp); | |
1895 | return 0; | |
1896 | } | |
1897 | ||
1898 | static struct file_operations kvm_vcpu_fops = { | |
1899 | .release = kvm_vcpu_release, | |
1900 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
1901 | .compat_ioctl = kvm_vcpu_ioctl, | |
1902 | }; | |
1903 | ||
1904 | /* | |
1905 | * Allocates an inode for the vcpu. | |
1906 | */ | |
1907 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
1908 | { | |
1909 | int fd, r; | |
1910 | struct inode *inode; | |
1911 | struct file *file; | |
1912 | ||
1913 | atomic_inc(&vcpu->kvm->filp->f_count); | |
1914 | inode = kvmfs_inode(&kvm_vcpu_fops); | |
1915 | if (IS_ERR(inode)) { | |
1916 | r = PTR_ERR(inode); | |
1917 | goto out1; | |
1918 | } | |
1919 | ||
1920 | file = kvmfs_file(inode, vcpu); | |
1921 | if (IS_ERR(file)) { | |
1922 | r = PTR_ERR(file); | |
1923 | goto out2; | |
1924 | } | |
1925 | ||
1926 | r = get_unused_fd(); | |
1927 | if (r < 0) | |
1928 | goto out3; | |
1929 | fd = r; | |
1930 | fd_install(fd, file); | |
1931 | ||
1932 | return fd; | |
1933 | ||
1934 | out3: | |
1935 | fput(file); | |
1936 | out2: | |
1937 | iput(inode); | |
1938 | out1: | |
1939 | fput(vcpu->kvm->filp); | |
1940 | return r; | |
1941 | } | |
1942 | ||
c5ea7660 AK |
1943 | /* |
1944 | * Creates some virtual cpus. Good luck creating more than one. | |
1945 | */ | |
1946 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
1947 | { | |
1948 | int r; | |
1949 | struct kvm_vcpu *vcpu; | |
1950 | ||
1951 | r = -EINVAL; | |
1952 | if (!valid_vcpu(n)) | |
1953 | goto out; | |
1954 | ||
1955 | vcpu = &kvm->vcpus[n]; | |
1956 | ||
1957 | mutex_lock(&vcpu->mutex); | |
1958 | ||
1959 | if (vcpu->vmcs) { | |
1960 | mutex_unlock(&vcpu->mutex); | |
1961 | return -EEXIST; | |
1962 | } | |
1963 | ||
1964 | vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf, | |
1965 | FX_IMAGE_ALIGN); | |
1966 | vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE; | |
1967 | ||
1968 | r = kvm_arch_ops->vcpu_create(vcpu); | |
1969 | if (r < 0) | |
1970 | goto out_free_vcpus; | |
1971 | ||
1972 | r = kvm_mmu_create(vcpu); | |
1973 | if (r < 0) | |
1974 | goto out_free_vcpus; | |
1975 | ||
1976 | kvm_arch_ops->vcpu_load(vcpu); | |
1977 | r = kvm_mmu_setup(vcpu); | |
1978 | if (r >= 0) | |
1979 | r = kvm_arch_ops->vcpu_setup(vcpu); | |
1980 | vcpu_put(vcpu); | |
1981 | ||
1982 | if (r < 0) | |
1983 | goto out_free_vcpus; | |
1984 | ||
bccf2150 AK |
1985 | r = create_vcpu_fd(vcpu); |
1986 | if (r < 0) | |
1987 | goto out_free_vcpus; | |
1988 | ||
1989 | return r; | |
c5ea7660 AK |
1990 | |
1991 | out_free_vcpus: | |
1992 | kvm_free_vcpu(vcpu); | |
1993 | mutex_unlock(&vcpu->mutex); | |
1994 | out: | |
1995 | return r; | |
1996 | } | |
1997 | ||
bccf2150 AK |
1998 | static long kvm_vcpu_ioctl(struct file *filp, |
1999 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2000 | { |
bccf2150 | 2001 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2002 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2003 | int r = -EINVAL; |
2004 | ||
2005 | switch (ioctl) { | |
6aa8b732 AK |
2006 | case KVM_RUN: { |
2007 | struct kvm_run kvm_run; | |
2008 | ||
2009 | r = -EFAULT; | |
2f366987 | 2010 | if (copy_from_user(&kvm_run, argp, sizeof kvm_run)) |
6aa8b732 | 2011 | goto out; |
bccf2150 | 2012 | r = kvm_vcpu_ioctl_run(vcpu, &kvm_run); |
c1150d8c | 2013 | if (r < 0 && r != -EINTR) |
6aa8b732 | 2014 | goto out; |
2f366987 | 2015 | if (copy_to_user(argp, &kvm_run, sizeof kvm_run)) { |
c1150d8c | 2016 | r = -EFAULT; |
6aa8b732 | 2017 | goto out; |
c1150d8c | 2018 | } |
6aa8b732 AK |
2019 | break; |
2020 | } | |
2021 | case KVM_GET_REGS: { | |
2022 | struct kvm_regs kvm_regs; | |
2023 | ||
bccf2150 AK |
2024 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2025 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2026 | if (r) |
2027 | goto out; | |
2028 | r = -EFAULT; | |
2f366987 | 2029 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2030 | goto out; |
2031 | r = 0; | |
2032 | break; | |
2033 | } | |
2034 | case KVM_SET_REGS: { | |
2035 | struct kvm_regs kvm_regs; | |
2036 | ||
2037 | r = -EFAULT; | |
2f366987 | 2038 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2039 | goto out; |
bccf2150 | 2040 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2041 | if (r) |
2042 | goto out; | |
2043 | r = 0; | |
2044 | break; | |
2045 | } | |
2046 | case KVM_GET_SREGS: { | |
2047 | struct kvm_sregs kvm_sregs; | |
2048 | ||
bccf2150 AK |
2049 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2050 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2051 | if (r) |
2052 | goto out; | |
2053 | r = -EFAULT; | |
2f366987 | 2054 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2055 | goto out; |
2056 | r = 0; | |
2057 | break; | |
2058 | } | |
2059 | case KVM_SET_SREGS: { | |
2060 | struct kvm_sregs kvm_sregs; | |
2061 | ||
2062 | r = -EFAULT; | |
2f366987 | 2063 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2064 | goto out; |
bccf2150 | 2065 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2066 | if (r) |
2067 | goto out; | |
2068 | r = 0; | |
2069 | break; | |
2070 | } | |
2071 | case KVM_TRANSLATE: { | |
2072 | struct kvm_translation tr; | |
2073 | ||
2074 | r = -EFAULT; | |
2f366987 | 2075 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2076 | goto out; |
bccf2150 | 2077 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2078 | if (r) |
2079 | goto out; | |
2080 | r = -EFAULT; | |
2f366987 | 2081 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2082 | goto out; |
2083 | r = 0; | |
2084 | break; | |
2085 | } | |
2086 | case KVM_INTERRUPT: { | |
2087 | struct kvm_interrupt irq; | |
2088 | ||
2089 | r = -EFAULT; | |
2f366987 | 2090 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2091 | goto out; |
bccf2150 | 2092 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2093 | if (r) |
2094 | goto out; | |
2095 | r = 0; | |
2096 | break; | |
2097 | } | |
2098 | case KVM_DEBUG_GUEST: { | |
2099 | struct kvm_debug_guest dbg; | |
2100 | ||
2101 | r = -EFAULT; | |
2f366987 | 2102 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2103 | goto out; |
bccf2150 | 2104 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2105 | if (r) |
2106 | goto out; | |
2107 | r = 0; | |
2108 | break; | |
2109 | } | |
bccf2150 AK |
2110 | case KVM_GET_MSRS: |
2111 | r = msr_io(vcpu, argp, get_msr, 1); | |
2112 | break; | |
2113 | case KVM_SET_MSRS: | |
2114 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2115 | break; | |
2116 | default: | |
2117 | ; | |
2118 | } | |
2119 | out: | |
2120 | return r; | |
2121 | } | |
2122 | ||
2123 | static long kvm_vm_ioctl(struct file *filp, | |
2124 | unsigned int ioctl, unsigned long arg) | |
2125 | { | |
2126 | struct kvm *kvm = filp->private_data; | |
2127 | void __user *argp = (void __user *)arg; | |
2128 | int r = -EINVAL; | |
2129 | ||
2130 | switch (ioctl) { | |
2131 | case KVM_CREATE_VCPU: | |
2132 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2133 | if (r < 0) | |
2134 | goto out; | |
2135 | break; | |
6aa8b732 AK |
2136 | case KVM_SET_MEMORY_REGION: { |
2137 | struct kvm_memory_region kvm_mem; | |
2138 | ||
2139 | r = -EFAULT; | |
2f366987 | 2140 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2141 | goto out; |
2c6f5df9 | 2142 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2143 | if (r) |
2144 | goto out; | |
2145 | break; | |
2146 | } | |
2147 | case KVM_GET_DIRTY_LOG: { | |
2148 | struct kvm_dirty_log log; | |
2149 | ||
2150 | r = -EFAULT; | |
2f366987 | 2151 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2152 | goto out; |
2c6f5df9 | 2153 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2154 | if (r) |
2155 | goto out; | |
2156 | break; | |
2157 | } | |
f17abe9a AK |
2158 | default: |
2159 | ; | |
2160 | } | |
2161 | out: | |
2162 | return r; | |
2163 | } | |
2164 | ||
2165 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2166 | unsigned long address, | |
2167 | int *type) | |
2168 | { | |
2169 | struct kvm *kvm = vma->vm_file->private_data; | |
2170 | unsigned long pgoff; | |
2171 | struct kvm_memory_slot *slot; | |
2172 | struct page *page; | |
2173 | ||
2174 | *type = VM_FAULT_MINOR; | |
2175 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
2176 | slot = gfn_to_memslot(kvm, pgoff); | |
2177 | if (!slot) | |
2178 | return NOPAGE_SIGBUS; | |
2179 | page = gfn_to_page(slot, pgoff); | |
2180 | if (!page) | |
2181 | return NOPAGE_SIGBUS; | |
2182 | get_page(page); | |
2183 | return page; | |
2184 | } | |
2185 | ||
2186 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2187 | .nopage = kvm_vm_nopage, | |
2188 | }; | |
2189 | ||
2190 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2191 | { | |
2192 | vma->vm_ops = &kvm_vm_vm_ops; | |
2193 | return 0; | |
2194 | } | |
2195 | ||
2196 | static struct file_operations kvm_vm_fops = { | |
2197 | .release = kvm_vm_release, | |
2198 | .unlocked_ioctl = kvm_vm_ioctl, | |
2199 | .compat_ioctl = kvm_vm_ioctl, | |
2200 | .mmap = kvm_vm_mmap, | |
2201 | }; | |
2202 | ||
2203 | static int kvm_dev_ioctl_create_vm(void) | |
2204 | { | |
2205 | int fd, r; | |
2206 | struct inode *inode; | |
2207 | struct file *file; | |
2208 | struct kvm *kvm; | |
2209 | ||
2210 | inode = kvmfs_inode(&kvm_vm_fops); | |
2211 | if (IS_ERR(inode)) { | |
2212 | r = PTR_ERR(inode); | |
2213 | goto out1; | |
2214 | } | |
2215 | ||
2216 | kvm = kvm_create_vm(); | |
2217 | if (IS_ERR(kvm)) { | |
2218 | r = PTR_ERR(kvm); | |
2219 | goto out2; | |
2220 | } | |
2221 | ||
2222 | file = kvmfs_file(inode, kvm); | |
2223 | if (IS_ERR(file)) { | |
2224 | r = PTR_ERR(file); | |
2225 | goto out3; | |
2226 | } | |
bccf2150 | 2227 | kvm->filp = file; |
f17abe9a AK |
2228 | |
2229 | r = get_unused_fd(); | |
2230 | if (r < 0) | |
2231 | goto out4; | |
2232 | fd = r; | |
2233 | fd_install(fd, file); | |
2234 | ||
2235 | return fd; | |
2236 | ||
2237 | out4: | |
2238 | fput(file); | |
2239 | out3: | |
2240 | kvm_destroy_vm(kvm); | |
2241 | out2: | |
2242 | iput(inode); | |
2243 | out1: | |
2244 | return r; | |
2245 | } | |
2246 | ||
2247 | static long kvm_dev_ioctl(struct file *filp, | |
2248 | unsigned int ioctl, unsigned long arg) | |
2249 | { | |
2250 | void __user *argp = (void __user *)arg; | |
2251 | int r = -EINVAL; | |
2252 | ||
2253 | switch (ioctl) { | |
2254 | case KVM_GET_API_VERSION: | |
2255 | r = KVM_API_VERSION; | |
2256 | break; | |
2257 | case KVM_CREATE_VM: | |
2258 | r = kvm_dev_ioctl_create_vm(); | |
2259 | break; | |
6aa8b732 | 2260 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 2261 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
2262 | struct kvm_msr_list msr_list; |
2263 | unsigned n; | |
2264 | ||
2265 | r = -EFAULT; | |
2266 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2267 | goto out; | |
2268 | n = msr_list.nmsrs; | |
6f00e68f | 2269 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
2270 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2271 | goto out; | |
2272 | r = -E2BIG; | |
bf591b24 | 2273 | if (n < num_msrs_to_save) |
6aa8b732 AK |
2274 | goto out; |
2275 | r = -EFAULT; | |
2276 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 2277 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 2278 | goto out; |
6f00e68f AK |
2279 | if (copy_to_user(user_msr_list->indices |
2280 | + num_msrs_to_save * sizeof(u32), | |
2281 | &emulated_msrs, | |
2282 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2283 | goto out; | |
6aa8b732 | 2284 | r = 0; |
cc1d8955 | 2285 | break; |
6aa8b732 AK |
2286 | } |
2287 | default: | |
2288 | ; | |
2289 | } | |
2290 | out: | |
2291 | return r; | |
2292 | } | |
2293 | ||
6aa8b732 AK |
2294 | static struct file_operations kvm_chardev_ops = { |
2295 | .open = kvm_dev_open, | |
2296 | .release = kvm_dev_release, | |
2297 | .unlocked_ioctl = kvm_dev_ioctl, | |
2298 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2299 | }; |
2300 | ||
2301 | static struct miscdevice kvm_dev = { | |
2302 | MISC_DYNAMIC_MINOR, | |
2303 | "kvm", | |
2304 | &kvm_chardev_ops, | |
2305 | }; | |
2306 | ||
2307 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, | |
2308 | void *v) | |
2309 | { | |
2310 | if (val == SYS_RESTART) { | |
2311 | /* | |
2312 | * Some (well, at least mine) BIOSes hang on reboot if | |
2313 | * in vmx root mode. | |
2314 | */ | |
2315 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
8b6d44c7 | 2316 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 AK |
2317 | } |
2318 | return NOTIFY_OK; | |
2319 | } | |
2320 | ||
2321 | static struct notifier_block kvm_reboot_notifier = { | |
2322 | .notifier_call = kvm_reboot, | |
2323 | .priority = 0, | |
2324 | }; | |
2325 | ||
774c47f1 AK |
2326 | /* |
2327 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
2328 | * cached on it. | |
2329 | */ | |
2330 | static void decache_vcpus_on_cpu(int cpu) | |
2331 | { | |
2332 | struct kvm *vm; | |
2333 | struct kvm_vcpu *vcpu; | |
2334 | int i; | |
2335 | ||
2336 | spin_lock(&kvm_lock); | |
2337 | list_for_each_entry(vm, &vm_list, vm_list) | |
2338 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
2339 | vcpu = &vm->vcpus[i]; | |
2340 | /* | |
2341 | * If the vcpu is locked, then it is running on some | |
2342 | * other cpu and therefore it is not cached on the | |
2343 | * cpu in question. | |
2344 | * | |
2345 | * If it's not locked, check the last cpu it executed | |
2346 | * on. | |
2347 | */ | |
2348 | if (mutex_trylock(&vcpu->mutex)) { | |
2349 | if (vcpu->cpu == cpu) { | |
2350 | kvm_arch_ops->vcpu_decache(vcpu); | |
2351 | vcpu->cpu = -1; | |
2352 | } | |
2353 | mutex_unlock(&vcpu->mutex); | |
2354 | } | |
2355 | } | |
2356 | spin_unlock(&kvm_lock); | |
2357 | } | |
2358 | ||
2359 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, | |
2360 | void *v) | |
2361 | { | |
2362 | int cpu = (long)v; | |
2363 | ||
2364 | switch (val) { | |
43934a38 | 2365 | case CPU_DOWN_PREPARE: |
774c47f1 | 2366 | case CPU_UP_CANCELED: |
43934a38 JK |
2367 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2368 | cpu); | |
774c47f1 AK |
2369 | decache_vcpus_on_cpu(cpu); |
2370 | smp_call_function_single(cpu, kvm_arch_ops->hardware_disable, | |
2371 | NULL, 0, 1); | |
2372 | break; | |
43934a38 JK |
2373 | case CPU_ONLINE: |
2374 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", | |
2375 | cpu); | |
774c47f1 AK |
2376 | smp_call_function_single(cpu, kvm_arch_ops->hardware_enable, |
2377 | NULL, 0, 1); | |
2378 | break; | |
2379 | } | |
2380 | return NOTIFY_OK; | |
2381 | } | |
2382 | ||
2383 | static struct notifier_block kvm_cpu_notifier = { | |
2384 | .notifier_call = kvm_cpu_hotplug, | |
2385 | .priority = 20, /* must be > scheduler priority */ | |
2386 | }; | |
2387 | ||
6aa8b732 AK |
2388 | static __init void kvm_init_debug(void) |
2389 | { | |
2390 | struct kvm_stats_debugfs_item *p; | |
2391 | ||
8b6d44c7 | 2392 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 AK |
2393 | for (p = debugfs_entries; p->name; ++p) |
2394 | p->dentry = debugfs_create_u32(p->name, 0444, debugfs_dir, | |
2395 | p->data); | |
2396 | } | |
2397 | ||
2398 | static void kvm_exit_debug(void) | |
2399 | { | |
2400 | struct kvm_stats_debugfs_item *p; | |
2401 | ||
2402 | for (p = debugfs_entries; p->name; ++p) | |
2403 | debugfs_remove(p->dentry); | |
2404 | debugfs_remove(debugfs_dir); | |
2405 | } | |
2406 | ||
59ae6c6b AK |
2407 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2408 | { | |
2409 | decache_vcpus_on_cpu(raw_smp_processor_id()); | |
19d1408d | 2410 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
59ae6c6b AK |
2411 | return 0; |
2412 | } | |
2413 | ||
2414 | static int kvm_resume(struct sys_device *dev) | |
2415 | { | |
19d1408d | 2416 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
59ae6c6b AK |
2417 | return 0; |
2418 | } | |
2419 | ||
2420 | static struct sysdev_class kvm_sysdev_class = { | |
2421 | set_kset_name("kvm"), | |
2422 | .suspend = kvm_suspend, | |
2423 | .resume = kvm_resume, | |
2424 | }; | |
2425 | ||
2426 | static struct sys_device kvm_sysdev = { | |
2427 | .id = 0, | |
2428 | .cls = &kvm_sysdev_class, | |
2429 | }; | |
2430 | ||
6aa8b732 AK |
2431 | hpa_t bad_page_address; |
2432 | ||
37e29d90 AK |
2433 | static int kvmfs_get_sb(struct file_system_type *fs_type, int flags, |
2434 | const char *dev_name, void *data, struct vfsmount *mnt) | |
2435 | { | |
2436 | return get_sb_pseudo(fs_type, "kvm:", NULL, KVMFS_MAGIC, mnt); | |
2437 | } | |
2438 | ||
2439 | static struct file_system_type kvm_fs_type = { | |
2440 | .name = "kvmfs", | |
2441 | .get_sb = kvmfs_get_sb, | |
2442 | .kill_sb = kill_anon_super, | |
2443 | }; | |
2444 | ||
6aa8b732 AK |
2445 | int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module) |
2446 | { | |
2447 | int r; | |
2448 | ||
09db28b8 YI |
2449 | if (kvm_arch_ops) { |
2450 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
2451 | return -EEXIST; | |
2452 | } | |
2453 | ||
e097f35c | 2454 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
2455 | printk(KERN_ERR "kvm: no hardware support\n"); |
2456 | return -EOPNOTSUPP; | |
2457 | } | |
e097f35c | 2458 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
2459 | printk(KERN_ERR "kvm: disabled by bios\n"); |
2460 | return -EOPNOTSUPP; | |
2461 | } | |
2462 | ||
e097f35c YI |
2463 | kvm_arch_ops = ops; |
2464 | ||
6aa8b732 AK |
2465 | r = kvm_arch_ops->hardware_setup(); |
2466 | if (r < 0) | |
2467 | return r; | |
2468 | ||
8b6d44c7 | 2469 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
774c47f1 AK |
2470 | r = register_cpu_notifier(&kvm_cpu_notifier); |
2471 | if (r) | |
2472 | goto out_free_1; | |
6aa8b732 AK |
2473 | register_reboot_notifier(&kvm_reboot_notifier); |
2474 | ||
59ae6c6b AK |
2475 | r = sysdev_class_register(&kvm_sysdev_class); |
2476 | if (r) | |
2477 | goto out_free_2; | |
2478 | ||
2479 | r = sysdev_register(&kvm_sysdev); | |
2480 | if (r) | |
2481 | goto out_free_3; | |
2482 | ||
6aa8b732 AK |
2483 | kvm_chardev_ops.owner = module; |
2484 | ||
2485 | r = misc_register(&kvm_dev); | |
2486 | if (r) { | |
2487 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
2488 | goto out_free; | |
2489 | } | |
2490 | ||
2491 | return r; | |
2492 | ||
2493 | out_free: | |
59ae6c6b AK |
2494 | sysdev_unregister(&kvm_sysdev); |
2495 | out_free_3: | |
2496 | sysdev_class_unregister(&kvm_sysdev_class); | |
2497 | out_free_2: | |
6aa8b732 | 2498 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
2499 | unregister_cpu_notifier(&kvm_cpu_notifier); |
2500 | out_free_1: | |
8b6d44c7 | 2501 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 AK |
2502 | kvm_arch_ops->hardware_unsetup(); |
2503 | return r; | |
2504 | } | |
2505 | ||
2506 | void kvm_exit_arch(void) | |
2507 | { | |
2508 | misc_deregister(&kvm_dev); | |
59ae6c6b AK |
2509 | sysdev_unregister(&kvm_sysdev); |
2510 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 2511 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 2512 | unregister_cpu_notifier(&kvm_cpu_notifier); |
8b6d44c7 | 2513 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 2514 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 2515 | kvm_arch_ops = NULL; |
6aa8b732 AK |
2516 | } |
2517 | ||
2518 | static __init int kvm_init(void) | |
2519 | { | |
2520 | static struct page *bad_page; | |
37e29d90 AK |
2521 | int r; |
2522 | ||
2523 | r = register_filesystem(&kvm_fs_type); | |
2524 | if (r) | |
2525 | goto out3; | |
6aa8b732 | 2526 | |
37e29d90 AK |
2527 | kvmfs_mnt = kern_mount(&kvm_fs_type); |
2528 | r = PTR_ERR(kvmfs_mnt); | |
2529 | if (IS_ERR(kvmfs_mnt)) | |
2530 | goto out2; | |
6aa8b732 AK |
2531 | kvm_init_debug(); |
2532 | ||
bf591b24 MR |
2533 | kvm_init_msr_list(); |
2534 | ||
6aa8b732 AK |
2535 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
2536 | r = -ENOMEM; | |
2537 | goto out; | |
2538 | } | |
2539 | ||
2540 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
2541 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
2542 | ||
2543 | return r; | |
2544 | ||
2545 | out: | |
2546 | kvm_exit_debug(); | |
37e29d90 AK |
2547 | mntput(kvmfs_mnt); |
2548 | out2: | |
2549 | unregister_filesystem(&kvm_fs_type); | |
2550 | out3: | |
6aa8b732 AK |
2551 | return r; |
2552 | } | |
2553 | ||
2554 | static __exit void kvm_exit(void) | |
2555 | { | |
2556 | kvm_exit_debug(); | |
2557 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
37e29d90 AK |
2558 | mntput(kvmfs_mnt); |
2559 | unregister_filesystem(&kvm_fs_type); | |
6aa8b732 AK |
2560 | } |
2561 | ||
2562 | module_init(kvm_init) | |
2563 | module_exit(kvm_exit) | |
2564 | ||
2565 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
2566 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |