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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> | |
e8edc6e0 | 43 | #include <linux/sched.h> |
6aa8b732 AK |
44 | |
45 | #include "x86_emulate.h" | |
46 | #include "segment_descriptor.h" | |
47 | ||
48 | MODULE_AUTHOR("Qumranet"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
133de902 AK |
51 | static DEFINE_SPINLOCK(kvm_lock); |
52 | static LIST_HEAD(vm_list); | |
53 | ||
6aa8b732 | 54 | struct kvm_arch_ops *kvm_arch_ops; |
1165f5fe AK |
55 | |
56 | #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x) | |
6aa8b732 AK |
57 | |
58 | static struct kvm_stats_debugfs_item { | |
59 | const char *name; | |
1165f5fe | 60 | int offset; |
6aa8b732 AK |
61 | struct dentry *dentry; |
62 | } debugfs_entries[] = { | |
1165f5fe AK |
63 | { "pf_fixed", STAT_OFFSET(pf_fixed) }, |
64 | { "pf_guest", STAT_OFFSET(pf_guest) }, | |
65 | { "tlb_flush", STAT_OFFSET(tlb_flush) }, | |
66 | { "invlpg", STAT_OFFSET(invlpg) }, | |
67 | { "exits", STAT_OFFSET(exits) }, | |
68 | { "io_exits", STAT_OFFSET(io_exits) }, | |
69 | { "mmio_exits", STAT_OFFSET(mmio_exits) }, | |
70 | { "signal_exits", STAT_OFFSET(signal_exits) }, | |
71 | { "irq_window", STAT_OFFSET(irq_window_exits) }, | |
72 | { "halt_exits", STAT_OFFSET(halt_exits) }, | |
73 | { "request_irq", STAT_OFFSET(request_irq_exits) }, | |
74 | { "irq_exits", STAT_OFFSET(irq_exits) }, | |
75 | { NULL } | |
6aa8b732 AK |
76 | }; |
77 | ||
78 | static struct dentry *debugfs_dir; | |
79 | ||
37e29d90 AK |
80 | struct vfsmount *kvmfs_mnt; |
81 | ||
6aa8b732 AK |
82 | #define MAX_IO_MSRS 256 |
83 | ||
84 | #define CR0_RESEVED_BITS 0xffffffff1ffaffc0ULL | |
85 | #define LMSW_GUEST_MASK 0x0eULL | |
86 | #define CR4_RESEVED_BITS (~((1ULL << 11) - 1)) | |
87 | #define CR8_RESEVED_BITS (~0x0fULL) | |
88 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe | |
89 | ||
05b3e0c2 | 90 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
91 | // LDT or TSS descriptor in the GDT. 16 bytes. |
92 | struct segment_descriptor_64 { | |
93 | struct segment_descriptor s; | |
94 | u32 base_higher; | |
95 | u32 pad_zero; | |
96 | }; | |
97 | ||
98 | #endif | |
99 | ||
bccf2150 AK |
100 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
101 | unsigned long arg); | |
102 | ||
f17abe9a AK |
103 | static struct inode *kvmfs_inode(struct file_operations *fops) |
104 | { | |
105 | int error = -ENOMEM; | |
106 | struct inode *inode = new_inode(kvmfs_mnt->mnt_sb); | |
107 | ||
108 | if (!inode) | |
109 | goto eexit_1; | |
110 | ||
111 | inode->i_fop = fops; | |
112 | ||
113 | /* | |
114 | * Mark the inode dirty from the very beginning, | |
115 | * that way it will never be moved to the dirty | |
116 | * list because mark_inode_dirty() will think | |
117 | * that it already _is_ on the dirty list. | |
118 | */ | |
119 | inode->i_state = I_DIRTY; | |
120 | inode->i_mode = S_IRUSR | S_IWUSR; | |
121 | inode->i_uid = current->fsuid; | |
122 | inode->i_gid = current->fsgid; | |
123 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
124 | return inode; | |
125 | ||
126 | eexit_1: | |
127 | return ERR_PTR(error); | |
128 | } | |
129 | ||
130 | static struct file *kvmfs_file(struct inode *inode, void *private_data) | |
131 | { | |
132 | struct file *file = get_empty_filp(); | |
133 | ||
134 | if (!file) | |
135 | return ERR_PTR(-ENFILE); | |
136 | ||
137 | file->f_path.mnt = mntget(kvmfs_mnt); | |
138 | file->f_path.dentry = d_alloc_anon(inode); | |
139 | if (!file->f_path.dentry) | |
140 | return ERR_PTR(-ENOMEM); | |
141 | file->f_mapping = inode->i_mapping; | |
142 | ||
143 | file->f_pos = 0; | |
144 | file->f_flags = O_RDWR; | |
145 | file->f_op = inode->i_fop; | |
146 | file->f_mode = FMODE_READ | FMODE_WRITE; | |
147 | file->f_version = 0; | |
148 | file->private_data = private_data; | |
149 | return file; | |
150 | } | |
151 | ||
6aa8b732 AK |
152 | unsigned long segment_base(u16 selector) |
153 | { | |
154 | struct descriptor_table gdt; | |
155 | struct segment_descriptor *d; | |
156 | unsigned long table_base; | |
157 | typedef unsigned long ul; | |
158 | unsigned long v; | |
159 | ||
160 | if (selector == 0) | |
161 | return 0; | |
162 | ||
163 | asm ("sgdt %0" : "=m"(gdt)); | |
164 | table_base = gdt.base; | |
165 | ||
166 | if (selector & 4) { /* from ldt */ | |
167 | u16 ldt_selector; | |
168 | ||
169 | asm ("sldt %0" : "=g"(ldt_selector)); | |
170 | table_base = segment_base(ldt_selector); | |
171 | } | |
172 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
173 | v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24); | |
05b3e0c2 | 174 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
175 | if (d->system == 0 |
176 | && (d->type == 2 || d->type == 9 || d->type == 11)) | |
177 | v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
178 | #endif | |
179 | return v; | |
180 | } | |
181 | EXPORT_SYMBOL_GPL(segment_base); | |
182 | ||
5aacf0ca JM |
183 | static inline int valid_vcpu(int n) |
184 | { | |
185 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
186 | } | |
187 | ||
d27d4aca AK |
188 | int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
189 | void *dest) | |
6aa8b732 AK |
190 | { |
191 | unsigned char *host_buf = dest; | |
192 | unsigned long req_size = size; | |
193 | ||
194 | while (size) { | |
195 | hpa_t paddr; | |
196 | unsigned now; | |
197 | unsigned offset; | |
198 | hva_t guest_buf; | |
199 | ||
200 | paddr = gva_to_hpa(vcpu, addr); | |
201 | ||
202 | if (is_error_hpa(paddr)) | |
203 | break; | |
204 | ||
205 | guest_buf = (hva_t)kmap_atomic( | |
206 | pfn_to_page(paddr >> PAGE_SHIFT), | |
207 | KM_USER0); | |
208 | offset = addr & ~PAGE_MASK; | |
209 | guest_buf |= offset; | |
210 | now = min(size, PAGE_SIZE - offset); | |
211 | memcpy(host_buf, (void*)guest_buf, now); | |
212 | host_buf += now; | |
213 | addr += now; | |
214 | size -= now; | |
215 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
216 | } | |
217 | return req_size - size; | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
220 | ||
d27d4aca AK |
221 | int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
222 | void *data) | |
6aa8b732 AK |
223 | { |
224 | unsigned char *host_buf = data; | |
225 | unsigned long req_size = size; | |
226 | ||
227 | while (size) { | |
228 | hpa_t paddr; | |
229 | unsigned now; | |
230 | unsigned offset; | |
231 | hva_t guest_buf; | |
ab51a434 | 232 | gfn_t gfn; |
6aa8b732 AK |
233 | |
234 | paddr = gva_to_hpa(vcpu, addr); | |
235 | ||
236 | if (is_error_hpa(paddr)) | |
237 | break; | |
238 | ||
ab51a434 UL |
239 | gfn = vcpu->mmu.gva_to_gpa(vcpu, addr) >> PAGE_SHIFT; |
240 | mark_page_dirty(vcpu->kvm, gfn); | |
6aa8b732 AK |
241 | guest_buf = (hva_t)kmap_atomic( |
242 | pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0); | |
243 | offset = addr & ~PAGE_MASK; | |
244 | guest_buf |= offset; | |
245 | now = min(size, PAGE_SIZE - offset); | |
246 | memcpy((void*)guest_buf, host_buf, now); | |
247 | host_buf += now; | |
248 | addr += now; | |
249 | size -= now; | |
250 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
251 | } | |
252 | return req_size - size; | |
253 | } | |
254 | EXPORT_SYMBOL_GPL(kvm_write_guest); | |
255 | ||
7702fd1f AK |
256 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
257 | { | |
258 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
259 | return; | |
260 | ||
261 | vcpu->guest_fpu_loaded = 1; | |
262 | fx_save(vcpu->host_fx_image); | |
263 | fx_restore(vcpu->guest_fx_image); | |
264 | } | |
265 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
266 | ||
267 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
268 | { | |
269 | if (!vcpu->guest_fpu_loaded) | |
270 | return; | |
271 | ||
272 | vcpu->guest_fpu_loaded = 0; | |
273 | fx_save(vcpu->guest_fx_image); | |
274 | fx_restore(vcpu->host_fx_image); | |
275 | } | |
276 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
277 | ||
bccf2150 AK |
278 | /* |
279 | * Switches to specified vcpu, until a matching vcpu_put() | |
280 | */ | |
281 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 282 | { |
bccf2150 AK |
283 | mutex_lock(&vcpu->mutex); |
284 | kvm_arch_ops->vcpu_load(vcpu); | |
6aa8b732 AK |
285 | } |
286 | ||
287 | /* | |
bccf2150 AK |
288 | * Switches to specified vcpu, until a matching vcpu_put(). Will return NULL |
289 | * if the slot is not populated. | |
6aa8b732 | 290 | */ |
bccf2150 | 291 | static struct kvm_vcpu *vcpu_load_slot(struct kvm *kvm, int slot) |
6aa8b732 | 292 | { |
bccf2150 | 293 | struct kvm_vcpu *vcpu = &kvm->vcpus[slot]; |
6aa8b732 AK |
294 | |
295 | mutex_lock(&vcpu->mutex); | |
bccf2150 | 296 | if (!vcpu->vmcs) { |
6aa8b732 | 297 | mutex_unlock(&vcpu->mutex); |
8b6d44c7 | 298 | return NULL; |
6aa8b732 | 299 | } |
bccf2150 AK |
300 | kvm_arch_ops->vcpu_load(vcpu); |
301 | return vcpu; | |
6aa8b732 AK |
302 | } |
303 | ||
304 | static void vcpu_put(struct kvm_vcpu *vcpu) | |
305 | { | |
306 | kvm_arch_ops->vcpu_put(vcpu); | |
6aa8b732 AK |
307 | mutex_unlock(&vcpu->mutex); |
308 | } | |
309 | ||
f17abe9a | 310 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
311 | { |
312 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
313 | int i; | |
314 | ||
315 | if (!kvm) | |
f17abe9a | 316 | return ERR_PTR(-ENOMEM); |
6aa8b732 AK |
317 | |
318 | spin_lock_init(&kvm->lock); | |
319 | INIT_LIST_HEAD(&kvm->active_mmu_pages); | |
320 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
321 | struct kvm_vcpu *vcpu = &kvm->vcpus[i]; | |
322 | ||
323 | mutex_init(&vcpu->mutex); | |
133de902 | 324 | vcpu->cpu = -1; |
86a2b42e | 325 | vcpu->kvm = kvm; |
6aa8b732 AK |
326 | vcpu->mmu.root_hpa = INVALID_PAGE; |
327 | INIT_LIST_HEAD(&vcpu->free_pages); | |
133de902 AK |
328 | spin_lock(&kvm_lock); |
329 | list_add(&kvm->vm_list, &vm_list); | |
330 | spin_unlock(&kvm_lock); | |
6aa8b732 | 331 | } |
f17abe9a AK |
332 | return kvm; |
333 | } | |
334 | ||
335 | static int kvm_dev_open(struct inode *inode, struct file *filp) | |
336 | { | |
6aa8b732 AK |
337 | return 0; |
338 | } | |
339 | ||
340 | /* | |
341 | * Free any memory in @free but not in @dont. | |
342 | */ | |
343 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
344 | struct kvm_memory_slot *dont) | |
345 | { | |
346 | int i; | |
347 | ||
348 | if (!dont || free->phys_mem != dont->phys_mem) | |
349 | if (free->phys_mem) { | |
350 | for (i = 0; i < free->npages; ++i) | |
55a54f79 AK |
351 | if (free->phys_mem[i]) |
352 | __free_page(free->phys_mem[i]); | |
6aa8b732 AK |
353 | vfree(free->phys_mem); |
354 | } | |
355 | ||
356 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
357 | vfree(free->dirty_bitmap); | |
358 | ||
8b6d44c7 | 359 | free->phys_mem = NULL; |
6aa8b732 | 360 | free->npages = 0; |
8b6d44c7 | 361 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
362 | } |
363 | ||
364 | static void kvm_free_physmem(struct kvm *kvm) | |
365 | { | |
366 | int i; | |
367 | ||
368 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 369 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
370 | } |
371 | ||
039576c0 AK |
372 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
373 | { | |
374 | int i; | |
375 | ||
376 | for (i = 0; i < 2; ++i) | |
377 | if (vcpu->pio.guest_pages[i]) { | |
378 | __free_page(vcpu->pio.guest_pages[i]); | |
379 | vcpu->pio.guest_pages[i] = NULL; | |
380 | } | |
381 | } | |
382 | ||
6aa8b732 AK |
383 | static void kvm_free_vcpu(struct kvm_vcpu *vcpu) |
384 | { | |
bccf2150 | 385 | if (!vcpu->vmcs) |
1e8ba6fb IM |
386 | return; |
387 | ||
bccf2150 | 388 | vcpu_load(vcpu); |
6aa8b732 | 389 | kvm_mmu_destroy(vcpu); |
08438475 | 390 | vcpu_put(vcpu); |
9ede74e0 | 391 | kvm_arch_ops->vcpu_free(vcpu); |
9a2bb7f4 AK |
392 | free_page((unsigned long)vcpu->run); |
393 | vcpu->run = NULL; | |
039576c0 AK |
394 | free_page((unsigned long)vcpu->pio_data); |
395 | vcpu->pio_data = NULL; | |
396 | free_pio_guest_pages(vcpu); | |
6aa8b732 AK |
397 | } |
398 | ||
399 | static void kvm_free_vcpus(struct kvm *kvm) | |
400 | { | |
401 | unsigned int i; | |
402 | ||
403 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
404 | kvm_free_vcpu(&kvm->vcpus[i]); | |
405 | } | |
406 | ||
407 | static int kvm_dev_release(struct inode *inode, struct file *filp) | |
408 | { | |
f17abe9a AK |
409 | return 0; |
410 | } | |
6aa8b732 | 411 | |
f17abe9a AK |
412 | static void kvm_destroy_vm(struct kvm *kvm) |
413 | { | |
133de902 AK |
414 | spin_lock(&kvm_lock); |
415 | list_del(&kvm->vm_list); | |
416 | spin_unlock(&kvm_lock); | |
6aa8b732 AK |
417 | kvm_free_vcpus(kvm); |
418 | kvm_free_physmem(kvm); | |
419 | kfree(kvm); | |
f17abe9a AK |
420 | } |
421 | ||
422 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
423 | { | |
424 | struct kvm *kvm = filp->private_data; | |
425 | ||
426 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
427 | return 0; |
428 | } | |
429 | ||
430 | static void inject_gp(struct kvm_vcpu *vcpu) | |
431 | { | |
432 | kvm_arch_ops->inject_gp(vcpu, 0); | |
433 | } | |
434 | ||
1342d353 AK |
435 | /* |
436 | * Load the pae pdptrs. Return true is they are all valid. | |
437 | */ | |
438 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
439 | { |
440 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 441 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 AK |
442 | int i; |
443 | u64 pdpte; | |
444 | u64 *pdpt; | |
1342d353 | 445 | int ret; |
954bbbc2 | 446 | struct page *page; |
6aa8b732 AK |
447 | |
448 | spin_lock(&vcpu->kvm->lock); | |
954bbbc2 AK |
449 | page = gfn_to_page(vcpu->kvm, pdpt_gfn); |
450 | /* FIXME: !page - emulate? 0xff? */ | |
451 | pdpt = kmap_atomic(page, KM_USER0); | |
6aa8b732 | 452 | |
1342d353 | 453 | ret = 1; |
6aa8b732 AK |
454 | for (i = 0; i < 4; ++i) { |
455 | pdpte = pdpt[offset + i]; | |
1342d353 AK |
456 | if ((pdpte & 1) && (pdpte & 0xfffffff0000001e6ull)) { |
457 | ret = 0; | |
458 | goto out; | |
459 | } | |
6aa8b732 AK |
460 | } |
461 | ||
1342d353 AK |
462 | for (i = 0; i < 4; ++i) |
463 | vcpu->pdptrs[i] = pdpt[offset + i]; | |
464 | ||
465 | out: | |
6aa8b732 AK |
466 | kunmap_atomic(pdpt, KM_USER0); |
467 | spin_unlock(&vcpu->kvm->lock); | |
468 | ||
1342d353 | 469 | return ret; |
6aa8b732 AK |
470 | } |
471 | ||
472 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
473 | { | |
474 | if (cr0 & CR0_RESEVED_BITS) { | |
475 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
476 | cr0, vcpu->cr0); | |
477 | inject_gp(vcpu); | |
478 | return; | |
479 | } | |
480 | ||
481 | if ((cr0 & CR0_NW_MASK) && !(cr0 & CR0_CD_MASK)) { | |
482 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
483 | inject_gp(vcpu); | |
484 | return; | |
485 | } | |
486 | ||
487 | if ((cr0 & CR0_PG_MASK) && !(cr0 & CR0_PE_MASK)) { | |
488 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
489 | "and a clear PE flag\n"); | |
490 | inject_gp(vcpu); | |
491 | return; | |
492 | } | |
493 | ||
494 | if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) { | |
05b3e0c2 | 495 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
496 | if ((vcpu->shadow_efer & EFER_LME)) { |
497 | int cs_db, cs_l; | |
498 | ||
499 | if (!is_pae(vcpu)) { | |
500 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
501 | "in long mode while PAE is disabled\n"); | |
502 | inject_gp(vcpu); | |
503 | return; | |
504 | } | |
505 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
506 | if (cs_l) { | |
507 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
508 | "in long mode while CS.L == 1\n"); | |
509 | inject_gp(vcpu); | |
510 | return; | |
511 | ||
512 | } | |
513 | } else | |
514 | #endif | |
1342d353 | 515 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
516 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
517 | "reserved bits\n"); | |
518 | inject_gp(vcpu); | |
519 | return; | |
520 | } | |
521 | ||
522 | } | |
523 | ||
524 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
525 | vcpu->cr0 = cr0; | |
526 | ||
527 | spin_lock(&vcpu->kvm->lock); | |
528 | kvm_mmu_reset_context(vcpu); | |
529 | spin_unlock(&vcpu->kvm->lock); | |
530 | return; | |
531 | } | |
532 | EXPORT_SYMBOL_GPL(set_cr0); | |
533 | ||
534 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
535 | { | |
536 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); | |
537 | } | |
538 | EXPORT_SYMBOL_GPL(lmsw); | |
539 | ||
540 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
541 | { | |
542 | if (cr4 & CR4_RESEVED_BITS) { | |
543 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
544 | inject_gp(vcpu); | |
545 | return; | |
546 | } | |
547 | ||
a9058ecd | 548 | if (is_long_mode(vcpu)) { |
6aa8b732 AK |
549 | if (!(cr4 & CR4_PAE_MASK)) { |
550 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
551 | "in long mode\n"); | |
552 | inject_gp(vcpu); | |
553 | return; | |
554 | } | |
555 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & CR4_PAE_MASK) | |
1342d353 | 556 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
557 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
558 | inject_gp(vcpu); | |
559 | } | |
560 | ||
561 | if (cr4 & CR4_VMXE_MASK) { | |
562 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
563 | inject_gp(vcpu); | |
564 | return; | |
565 | } | |
566 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
567 | spin_lock(&vcpu->kvm->lock); | |
568 | kvm_mmu_reset_context(vcpu); | |
569 | spin_unlock(&vcpu->kvm->lock); | |
570 | } | |
571 | EXPORT_SYMBOL_GPL(set_cr4); | |
572 | ||
573 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
574 | { | |
a9058ecd | 575 | if (is_long_mode(vcpu)) { |
d27d4aca | 576 | if (cr3 & CR3_L_MODE_RESEVED_BITS) { |
6aa8b732 AK |
577 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
578 | inject_gp(vcpu); | |
579 | return; | |
580 | } | |
581 | } else { | |
582 | if (cr3 & CR3_RESEVED_BITS) { | |
583 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
584 | inject_gp(vcpu); | |
585 | return; | |
586 | } | |
587 | if (is_paging(vcpu) && is_pae(vcpu) && | |
1342d353 | 588 | !load_pdptrs(vcpu, cr3)) { |
6aa8b732 AK |
589 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
590 | "reserved bits\n"); | |
591 | inject_gp(vcpu); | |
592 | return; | |
593 | } | |
594 | } | |
595 | ||
596 | vcpu->cr3 = cr3; | |
597 | spin_lock(&vcpu->kvm->lock); | |
d21225ee IM |
598 | /* |
599 | * Does the new cr3 value map to physical memory? (Note, we | |
600 | * catch an invalid cr3 even in real-mode, because it would | |
601 | * cause trouble later on when we turn on paging anyway.) | |
602 | * | |
603 | * A real CPU would silently accept an invalid cr3 and would | |
604 | * attempt to use it - with largely undefined (and often hard | |
605 | * to debug) behavior on the guest side. | |
606 | */ | |
607 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
608 | inject_gp(vcpu); | |
609 | else | |
610 | vcpu->mmu.new_cr3(vcpu); | |
6aa8b732 AK |
611 | spin_unlock(&vcpu->kvm->lock); |
612 | } | |
613 | EXPORT_SYMBOL_GPL(set_cr3); | |
614 | ||
615 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
616 | { | |
617 | if ( cr8 & CR8_RESEVED_BITS) { | |
618 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
619 | inject_gp(vcpu); | |
620 | return; | |
621 | } | |
622 | vcpu->cr8 = cr8; | |
623 | } | |
624 | EXPORT_SYMBOL_GPL(set_cr8); | |
625 | ||
626 | void fx_init(struct kvm_vcpu *vcpu) | |
627 | { | |
628 | struct __attribute__ ((__packed__)) fx_image_s { | |
629 | u16 control; //fcw | |
630 | u16 status; //fsw | |
631 | u16 tag; // ftw | |
632 | u16 opcode; //fop | |
633 | u64 ip; // fpu ip | |
634 | u64 operand;// fpu dp | |
635 | u32 mxcsr; | |
636 | u32 mxcsr_mask; | |
637 | ||
638 | } *fx_image; | |
639 | ||
640 | fx_save(vcpu->host_fx_image); | |
641 | fpu_init(); | |
642 | fx_save(vcpu->guest_fx_image); | |
643 | fx_restore(vcpu->host_fx_image); | |
644 | ||
645 | fx_image = (struct fx_image_s *)vcpu->guest_fx_image; | |
646 | fx_image->mxcsr = 0x1f80; | |
647 | memset(vcpu->guest_fx_image + sizeof(struct fx_image_s), | |
648 | 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s)); | |
649 | } | |
650 | EXPORT_SYMBOL_GPL(fx_init); | |
651 | ||
02b27c1f UL |
652 | static void do_remove_write_access(struct kvm_vcpu *vcpu, int slot) |
653 | { | |
654 | spin_lock(&vcpu->kvm->lock); | |
655 | kvm_mmu_slot_remove_write_access(vcpu, slot); | |
656 | spin_unlock(&vcpu->kvm->lock); | |
657 | } | |
658 | ||
6aa8b732 AK |
659 | /* |
660 | * Allocate some memory and give it an address in the guest physical address | |
661 | * space. | |
662 | * | |
663 | * Discontiguous memory is allowed, mostly for framebuffers. | |
664 | */ | |
2c6f5df9 AK |
665 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
666 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
667 | { |
668 | int r; | |
669 | gfn_t base_gfn; | |
670 | unsigned long npages; | |
671 | unsigned long i; | |
672 | struct kvm_memory_slot *memslot; | |
673 | struct kvm_memory_slot old, new; | |
674 | int memory_config_version; | |
675 | ||
676 | r = -EINVAL; | |
677 | /* General sanity checks */ | |
678 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
679 | goto out; | |
680 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
681 | goto out; | |
682 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
683 | goto out; | |
684 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
685 | goto out; | |
686 | ||
687 | memslot = &kvm->memslots[mem->slot]; | |
688 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
689 | npages = mem->memory_size >> PAGE_SHIFT; | |
690 | ||
691 | if (!npages) | |
692 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
693 | ||
694 | raced: | |
695 | spin_lock(&kvm->lock); | |
696 | ||
697 | memory_config_version = kvm->memory_config_version; | |
698 | new = old = *memslot; | |
699 | ||
700 | new.base_gfn = base_gfn; | |
701 | new.npages = npages; | |
702 | new.flags = mem->flags; | |
703 | ||
704 | /* Disallow changing a memory slot's size. */ | |
705 | r = -EINVAL; | |
706 | if (npages && old.npages && npages != old.npages) | |
707 | goto out_unlock; | |
708 | ||
709 | /* Check for overlaps */ | |
710 | r = -EEXIST; | |
711 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
712 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
713 | ||
714 | if (s == memslot) | |
715 | continue; | |
716 | if (!((base_gfn + npages <= s->base_gfn) || | |
717 | (base_gfn >= s->base_gfn + s->npages))) | |
718 | goto out_unlock; | |
719 | } | |
720 | /* | |
721 | * Do memory allocations outside lock. memory_config_version will | |
722 | * detect any races. | |
723 | */ | |
724 | spin_unlock(&kvm->lock); | |
725 | ||
726 | /* Deallocate if slot is being removed */ | |
727 | if (!npages) | |
8b6d44c7 | 728 | new.phys_mem = NULL; |
6aa8b732 AK |
729 | |
730 | /* Free page dirty bitmap if unneeded */ | |
731 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 732 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
733 | |
734 | r = -ENOMEM; | |
735 | ||
736 | /* Allocate if a slot is being created */ | |
737 | if (npages && !new.phys_mem) { | |
738 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
739 | ||
740 | if (!new.phys_mem) | |
741 | goto out_free; | |
742 | ||
743 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
744 | for (i = 0; i < npages; ++i) { | |
745 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
746 | | __GFP_ZERO); | |
747 | if (!new.phys_mem[i]) | |
748 | goto out_free; | |
5972e953 | 749 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
750 | } |
751 | } | |
752 | ||
753 | /* Allocate page dirty bitmap if needed */ | |
754 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
755 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
756 | ||
757 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
758 | if (!new.dirty_bitmap) | |
759 | goto out_free; | |
760 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
761 | } | |
762 | ||
763 | spin_lock(&kvm->lock); | |
764 | ||
765 | if (memory_config_version != kvm->memory_config_version) { | |
766 | spin_unlock(&kvm->lock); | |
767 | kvm_free_physmem_slot(&new, &old); | |
768 | goto raced; | |
769 | } | |
770 | ||
771 | r = -EAGAIN; | |
772 | if (kvm->busy) | |
773 | goto out_unlock; | |
774 | ||
775 | if (mem->slot >= kvm->nmemslots) | |
776 | kvm->nmemslots = mem->slot + 1; | |
777 | ||
778 | *memslot = new; | |
779 | ++kvm->memory_config_version; | |
780 | ||
781 | spin_unlock(&kvm->lock); | |
782 | ||
783 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
784 | struct kvm_vcpu *vcpu; | |
785 | ||
bccf2150 | 786 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
787 | if (!vcpu) |
788 | continue; | |
ff990d59 UL |
789 | if (new.flags & KVM_MEM_LOG_DIRTY_PAGES) |
790 | do_remove_write_access(vcpu, mem->slot); | |
6aa8b732 AK |
791 | kvm_mmu_reset_context(vcpu); |
792 | vcpu_put(vcpu); | |
793 | } | |
794 | ||
795 | kvm_free_physmem_slot(&old, &new); | |
796 | return 0; | |
797 | ||
798 | out_unlock: | |
799 | spin_unlock(&kvm->lock); | |
800 | out_free: | |
801 | kvm_free_physmem_slot(&new, &old); | |
802 | out: | |
803 | return r; | |
804 | } | |
805 | ||
806 | /* | |
807 | * Get (and clear) the dirty memory log for a memory slot. | |
808 | */ | |
2c6f5df9 AK |
809 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
810 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
811 | { |
812 | struct kvm_memory_slot *memslot; | |
813 | int r, i; | |
814 | int n; | |
714b93da | 815 | int cleared; |
6aa8b732 AK |
816 | unsigned long any = 0; |
817 | ||
818 | spin_lock(&kvm->lock); | |
819 | ||
820 | /* | |
821 | * Prevent changes to guest memory configuration even while the lock | |
822 | * is not taken. | |
823 | */ | |
824 | ++kvm->busy; | |
825 | spin_unlock(&kvm->lock); | |
826 | r = -EINVAL; | |
827 | if (log->slot >= KVM_MEMORY_SLOTS) | |
828 | goto out; | |
829 | ||
830 | memslot = &kvm->memslots[log->slot]; | |
831 | r = -ENOENT; | |
832 | if (!memslot->dirty_bitmap) | |
833 | goto out; | |
834 | ||
cd1a4a98 | 835 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 836 | |
cd1a4a98 | 837 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
838 | any = memslot->dirty_bitmap[i]; |
839 | ||
840 | r = -EFAULT; | |
841 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
842 | goto out; | |
843 | ||
6aa8b732 | 844 | if (any) { |
714b93da | 845 | cleared = 0; |
6aa8b732 | 846 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
bccf2150 | 847 | struct kvm_vcpu *vcpu; |
6aa8b732 | 848 | |
bccf2150 | 849 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
850 | if (!vcpu) |
851 | continue; | |
714b93da AK |
852 | if (!cleared) { |
853 | do_remove_write_access(vcpu, log->slot); | |
854 | memset(memslot->dirty_bitmap, 0, n); | |
855 | cleared = 1; | |
856 | } | |
6aa8b732 AK |
857 | kvm_arch_ops->tlb_flush(vcpu); |
858 | vcpu_put(vcpu); | |
859 | } | |
860 | } | |
861 | ||
862 | r = 0; | |
863 | ||
864 | out: | |
865 | spin_lock(&kvm->lock); | |
866 | --kvm->busy; | |
867 | spin_unlock(&kvm->lock); | |
868 | return r; | |
869 | } | |
870 | ||
e8207547 AK |
871 | /* |
872 | * Set a new alias region. Aliases map a portion of physical memory into | |
873 | * another portion. This is useful for memory windows, for example the PC | |
874 | * VGA region. | |
875 | */ | |
876 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
877 | struct kvm_memory_alias *alias) | |
878 | { | |
879 | int r, n; | |
880 | struct kvm_mem_alias *p; | |
881 | ||
882 | r = -EINVAL; | |
883 | /* General sanity checks */ | |
884 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
885 | goto out; | |
886 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
887 | goto out; | |
888 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
889 | goto out; | |
890 | if (alias->guest_phys_addr + alias->memory_size | |
891 | < alias->guest_phys_addr) | |
892 | goto out; | |
893 | if (alias->target_phys_addr + alias->memory_size | |
894 | < alias->target_phys_addr) | |
895 | goto out; | |
896 | ||
897 | spin_lock(&kvm->lock); | |
898 | ||
899 | p = &kvm->aliases[alias->slot]; | |
900 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
901 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
902 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
903 | ||
904 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
905 | if (kvm->aliases[n - 1].npages) | |
906 | break; | |
907 | kvm->naliases = n; | |
908 | ||
909 | spin_unlock(&kvm->lock); | |
910 | ||
911 | vcpu_load(&kvm->vcpus[0]); | |
912 | spin_lock(&kvm->lock); | |
913 | kvm_mmu_zap_all(&kvm->vcpus[0]); | |
914 | spin_unlock(&kvm->lock); | |
915 | vcpu_put(&kvm->vcpus[0]); | |
916 | ||
917 | return 0; | |
918 | ||
919 | out: | |
920 | return r; | |
921 | } | |
922 | ||
923 | static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
924 | { | |
925 | int i; | |
926 | struct kvm_mem_alias *alias; | |
927 | ||
928 | for (i = 0; i < kvm->naliases; ++i) { | |
929 | alias = &kvm->aliases[i]; | |
930 | if (gfn >= alias->base_gfn | |
931 | && gfn < alias->base_gfn + alias->npages) | |
932 | return alias->target_gfn + gfn - alias->base_gfn; | |
933 | } | |
934 | return gfn; | |
935 | } | |
936 | ||
937 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
938 | { |
939 | int i; | |
940 | ||
941 | for (i = 0; i < kvm->nmemslots; ++i) { | |
942 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
943 | ||
944 | if (gfn >= memslot->base_gfn | |
945 | && gfn < memslot->base_gfn + memslot->npages) | |
946 | return memslot; | |
947 | } | |
8b6d44c7 | 948 | return NULL; |
6aa8b732 | 949 | } |
e8207547 AK |
950 | |
951 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
952 | { | |
953 | gfn = unalias_gfn(kvm, gfn); | |
954 | return __gfn_to_memslot(kvm, gfn); | |
955 | } | |
6aa8b732 | 956 | |
954bbbc2 AK |
957 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
958 | { | |
959 | struct kvm_memory_slot *slot; | |
960 | ||
e8207547 AK |
961 | gfn = unalias_gfn(kvm, gfn); |
962 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
963 | if (!slot) |
964 | return NULL; | |
965 | return slot->phys_mem[gfn - slot->base_gfn]; | |
966 | } | |
967 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
968 | ||
6aa8b732 AK |
969 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
970 | { | |
971 | int i; | |
8b6d44c7 | 972 | struct kvm_memory_slot *memslot = NULL; |
6aa8b732 AK |
973 | unsigned long rel_gfn; |
974 | ||
975 | for (i = 0; i < kvm->nmemslots; ++i) { | |
976 | memslot = &kvm->memslots[i]; | |
977 | ||
978 | if (gfn >= memslot->base_gfn | |
979 | && gfn < memslot->base_gfn + memslot->npages) { | |
980 | ||
981 | if (!memslot || !memslot->dirty_bitmap) | |
982 | return; | |
983 | ||
984 | rel_gfn = gfn - memslot->base_gfn; | |
985 | ||
986 | /* avoid RMW */ | |
987 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
988 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
989 | return; | |
990 | } | |
991 | } | |
992 | } | |
993 | ||
994 | static int emulator_read_std(unsigned long addr, | |
4c690a1e | 995 | void *val, |
6aa8b732 AK |
996 | unsigned int bytes, |
997 | struct x86_emulate_ctxt *ctxt) | |
998 | { | |
999 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1000 | void *data = val; | |
1001 | ||
1002 | while (bytes) { | |
1003 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1004 | unsigned offset = addr & (PAGE_SIZE-1); | |
1005 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1006 | unsigned long pfn; | |
954bbbc2 AK |
1007 | struct page *page; |
1008 | void *page_virt; | |
6aa8b732 AK |
1009 | |
1010 | if (gpa == UNMAPPED_GVA) | |
1011 | return X86EMUL_PROPAGATE_FAULT; | |
1012 | pfn = gpa >> PAGE_SHIFT; | |
954bbbc2 AK |
1013 | page = gfn_to_page(vcpu->kvm, pfn); |
1014 | if (!page) | |
6aa8b732 | 1015 | return X86EMUL_UNHANDLEABLE; |
954bbbc2 | 1016 | page_virt = kmap_atomic(page, KM_USER0); |
6aa8b732 | 1017 | |
954bbbc2 | 1018 | memcpy(data, page_virt + offset, tocopy); |
6aa8b732 | 1019 | |
954bbbc2 | 1020 | kunmap_atomic(page_virt, KM_USER0); |
6aa8b732 AK |
1021 | |
1022 | bytes -= tocopy; | |
1023 | data += tocopy; | |
1024 | addr += tocopy; | |
1025 | } | |
1026 | ||
1027 | return X86EMUL_CONTINUE; | |
1028 | } | |
1029 | ||
1030 | static int emulator_write_std(unsigned long addr, | |
4c690a1e | 1031 | const void *val, |
6aa8b732 AK |
1032 | unsigned int bytes, |
1033 | struct x86_emulate_ctxt *ctxt) | |
1034 | { | |
1035 | printk(KERN_ERR "emulator_write_std: addr %lx n %d\n", | |
1036 | addr, bytes); | |
1037 | return X86EMUL_UNHANDLEABLE; | |
1038 | } | |
1039 | ||
1040 | static int emulator_read_emulated(unsigned long addr, | |
4c690a1e | 1041 | void *val, |
6aa8b732 AK |
1042 | unsigned int bytes, |
1043 | struct x86_emulate_ctxt *ctxt) | |
1044 | { | |
1045 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1046 | ||
1047 | if (vcpu->mmio_read_completed) { | |
1048 | memcpy(val, vcpu->mmio_data, bytes); | |
1049 | vcpu->mmio_read_completed = 0; | |
1050 | return X86EMUL_CONTINUE; | |
1051 | } else if (emulator_read_std(addr, val, bytes, ctxt) | |
1052 | == X86EMUL_CONTINUE) | |
1053 | return X86EMUL_CONTINUE; | |
1054 | else { | |
1055 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
d27d4aca | 1056 | |
6aa8b732 | 1057 | if (gpa == UNMAPPED_GVA) |
d27d4aca | 1058 | return X86EMUL_PROPAGATE_FAULT; |
6aa8b732 AK |
1059 | vcpu->mmio_needed = 1; |
1060 | vcpu->mmio_phys_addr = gpa; | |
1061 | vcpu->mmio_size = bytes; | |
1062 | vcpu->mmio_is_write = 0; | |
1063 | ||
1064 | return X86EMUL_UNHANDLEABLE; | |
1065 | } | |
1066 | } | |
1067 | ||
da4a00f0 | 1068 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
4c690a1e | 1069 | const void *val, int bytes) |
da4a00f0 | 1070 | { |
da4a00f0 AK |
1071 | struct page *page; |
1072 | void *virt; | |
1073 | ||
1074 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
1075 | return 0; | |
954bbbc2 AK |
1076 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
1077 | if (!page) | |
da4a00f0 | 1078 | return 0; |
da4a00f0 | 1079 | kvm_mmu_pre_write(vcpu, gpa, bytes); |
ab51a434 | 1080 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 | 1081 | virt = kmap_atomic(page, KM_USER0); |
4c690a1e | 1082 | memcpy(virt + offset_in_page(gpa), val, bytes); |
da4a00f0 AK |
1083 | kunmap_atomic(virt, KM_USER0); |
1084 | kvm_mmu_post_write(vcpu, gpa, bytes); | |
1085 | return 1; | |
1086 | } | |
1087 | ||
6aa8b732 | 1088 | static int emulator_write_emulated(unsigned long addr, |
4c690a1e | 1089 | const void *val, |
6aa8b732 AK |
1090 | unsigned int bytes, |
1091 | struct x86_emulate_ctxt *ctxt) | |
1092 | { | |
1093 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1094 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1095 | ||
c9047f53 AK |
1096 | if (gpa == UNMAPPED_GVA) { |
1097 | kvm_arch_ops->inject_page_fault(vcpu, addr, 2); | |
6aa8b732 | 1098 | return X86EMUL_PROPAGATE_FAULT; |
c9047f53 | 1099 | } |
6aa8b732 | 1100 | |
da4a00f0 AK |
1101 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1102 | return X86EMUL_CONTINUE; | |
1103 | ||
6aa8b732 AK |
1104 | vcpu->mmio_needed = 1; |
1105 | vcpu->mmio_phys_addr = gpa; | |
1106 | vcpu->mmio_size = bytes; | |
1107 | vcpu->mmio_is_write = 1; | |
4c690a1e | 1108 | memcpy(vcpu->mmio_data, val, bytes); |
6aa8b732 AK |
1109 | |
1110 | return X86EMUL_CONTINUE; | |
1111 | } | |
1112 | ||
1113 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
4c690a1e AK |
1114 | const void *old, |
1115 | const void *new, | |
6aa8b732 AK |
1116 | unsigned int bytes, |
1117 | struct x86_emulate_ctxt *ctxt) | |
1118 | { | |
1119 | static int reported; | |
1120 | ||
1121 | if (!reported) { | |
1122 | reported = 1; | |
1123 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1124 | } | |
1125 | return emulator_write_emulated(addr, new, bytes, ctxt); | |
1126 | } | |
1127 | ||
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 | 1142 | cr0 = vcpu->cr0 & ~CR0_TS_MASK; |
6aa8b732 AK |
1143 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1144 | return X86EMUL_CONTINUE; | |
1145 | } | |
1146 | ||
1147 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1148 | { | |
1149 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1150 | ||
1151 | switch (dr) { | |
1152 | case 0 ... 3: | |
1153 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1154 | return X86EMUL_CONTINUE; | |
1155 | default: | |
1156 | printk(KERN_DEBUG "%s: unexpected dr %u\n", | |
1157 | __FUNCTION__, dr); | |
1158 | return X86EMUL_UNHANDLEABLE; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1163 | { | |
1164 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1165 | int exception; | |
1166 | ||
1167 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1168 | if (exception) { | |
1169 | /* FIXME: better handling */ | |
1170 | return X86EMUL_UNHANDLEABLE; | |
1171 | } | |
1172 | return X86EMUL_CONTINUE; | |
1173 | } | |
1174 | ||
1175 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1176 | { | |
1177 | static int reported; | |
1178 | u8 opcodes[4]; | |
1179 | unsigned long rip = ctxt->vcpu->rip; | |
1180 | unsigned long rip_linear; | |
1181 | ||
1182 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1183 | ||
1184 | if (reported) | |
1185 | return; | |
1186 | ||
1187 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt); | |
1188 | ||
1189 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1190 | " rip %lx %02x %02x %02x %02x\n", | |
1191 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1192 | reported = 1; | |
1193 | } | |
1194 | ||
1195 | struct x86_emulate_ops emulate_ops = { | |
1196 | .read_std = emulator_read_std, | |
1197 | .write_std = emulator_write_std, | |
1198 | .read_emulated = emulator_read_emulated, | |
1199 | .write_emulated = emulator_write_emulated, | |
1200 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1201 | }; | |
1202 | ||
1203 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1204 | struct kvm_run *run, | |
1205 | unsigned long cr2, | |
1206 | u16 error_code) | |
1207 | { | |
1208 | struct x86_emulate_ctxt emulate_ctxt; | |
1209 | int r; | |
1210 | int cs_db, cs_l; | |
1211 | ||
e7df56e4 | 1212 | vcpu->mmio_fault_cr2 = cr2; |
6aa8b732 AK |
1213 | kvm_arch_ops->cache_regs(vcpu); |
1214 | ||
1215 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1216 | ||
1217 | emulate_ctxt.vcpu = vcpu; | |
1218 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1219 | emulate_ctxt.cr2 = cr2; | |
1220 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1221 | ? X86EMUL_MODE_REAL : cs_l | |
1222 | ? X86EMUL_MODE_PROT64 : cs_db | |
1223 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1224 | ||
1225 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1226 | emulate_ctxt.cs_base = 0; | |
1227 | emulate_ctxt.ds_base = 0; | |
1228 | emulate_ctxt.es_base = 0; | |
1229 | emulate_ctxt.ss_base = 0; | |
1230 | } else { | |
1231 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1232 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1233 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1234 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1235 | } | |
1236 | ||
1237 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1238 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1239 | ||
1240 | vcpu->mmio_is_write = 0; | |
1241 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); | |
1242 | ||
1243 | if ((r || vcpu->mmio_is_write) && run) { | |
1244 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
1245 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1246 | run->mmio.len = vcpu->mmio_size; | |
1247 | run->mmio.is_write = vcpu->mmio_is_write; | |
1248 | } | |
1249 | ||
1250 | if (r) { | |
a436036b AK |
1251 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1252 | return EMULATE_DONE; | |
6aa8b732 AK |
1253 | if (!vcpu->mmio_needed) { |
1254 | report_emulation_failure(&emulate_ctxt); | |
1255 | return EMULATE_FAIL; | |
1256 | } | |
1257 | return EMULATE_DO_MMIO; | |
1258 | } | |
1259 | ||
1260 | kvm_arch_ops->decache_regs(vcpu); | |
1261 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1262 | ||
02c83209 AK |
1263 | if (vcpu->mmio_is_write) { |
1264 | vcpu->mmio_needed = 0; | |
6aa8b732 | 1265 | return EMULATE_DO_MMIO; |
02c83209 | 1266 | } |
6aa8b732 AK |
1267 | |
1268 | return EMULATE_DONE; | |
1269 | } | |
1270 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1271 | ||
270fd9b9 AK |
1272 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1273 | { | |
1274 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1275 | ||
9b22bf57 | 1276 | kvm_arch_ops->cache_regs(vcpu); |
270fd9b9 AK |
1277 | ret = -KVM_EINVAL; |
1278 | #ifdef CONFIG_X86_64 | |
1279 | if (is_long_mode(vcpu)) { | |
1280 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1281 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1282 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1283 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1284 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1285 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1286 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1287 | } else | |
1288 | #endif | |
1289 | { | |
1290 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1291 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1292 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1293 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1294 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1295 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1296 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1297 | } | |
1298 | switch (nr) { | |
1299 | default: | |
b4e63f56 AK |
1300 | run->hypercall.args[0] = a0; |
1301 | run->hypercall.args[1] = a1; | |
1302 | run->hypercall.args[2] = a2; | |
1303 | run->hypercall.args[3] = a3; | |
1304 | run->hypercall.args[4] = a4; | |
1305 | run->hypercall.args[5] = a5; | |
1306 | run->hypercall.ret = ret; | |
1307 | run->hypercall.longmode = is_long_mode(vcpu); | |
1308 | kvm_arch_ops->decache_regs(vcpu); | |
1309 | return 0; | |
270fd9b9 AK |
1310 | } |
1311 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
9b22bf57 | 1312 | kvm_arch_ops->decache_regs(vcpu); |
270fd9b9 AK |
1313 | return 1; |
1314 | } | |
1315 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1316 | ||
6aa8b732 AK |
1317 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1318 | { | |
1319 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1320 | } | |
1321 | ||
1322 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1323 | { | |
1324 | struct descriptor_table dt = { limit, base }; | |
1325 | ||
1326 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1327 | } | |
1328 | ||
1329 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1330 | { | |
1331 | struct descriptor_table dt = { limit, base }; | |
1332 | ||
1333 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1334 | } | |
1335 | ||
1336 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1337 | unsigned long *rflags) | |
1338 | { | |
1339 | lmsw(vcpu, msw); | |
1340 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1341 | } | |
1342 | ||
1343 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1344 | { | |
25c4c276 | 1345 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1346 | switch (cr) { |
1347 | case 0: | |
1348 | return vcpu->cr0; | |
1349 | case 2: | |
1350 | return vcpu->cr2; | |
1351 | case 3: | |
1352 | return vcpu->cr3; | |
1353 | case 4: | |
1354 | return vcpu->cr4; | |
1355 | default: | |
1356 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1357 | return 0; | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1362 | unsigned long *rflags) | |
1363 | { | |
1364 | switch (cr) { | |
1365 | case 0: | |
1366 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1367 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1368 | break; | |
1369 | case 2: | |
1370 | vcpu->cr2 = val; | |
1371 | break; | |
1372 | case 3: | |
1373 | set_cr3(vcpu, val); | |
1374 | break; | |
1375 | case 4: | |
1376 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1377 | break; | |
1378 | default: | |
1379 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1380 | } | |
1381 | } | |
1382 | ||
102d8325 IM |
1383 | /* |
1384 | * Register the para guest with the host: | |
1385 | */ | |
1386 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1387 | { | |
1388 | struct kvm_vcpu_para_state *para_state; | |
1389 | hpa_t para_state_hpa, hypercall_hpa; | |
1390 | struct page *para_state_page; | |
1391 | unsigned char *hypercall; | |
1392 | gpa_t hypercall_gpa; | |
1393 | ||
1394 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1395 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1396 | ||
1397 | /* | |
1398 | * Needs to be page aligned: | |
1399 | */ | |
1400 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1401 | goto err_gp; | |
1402 | ||
1403 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1404 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1405 | if (is_error_hpa(para_state_hpa)) | |
1406 | goto err_gp; | |
1407 | ||
ab51a434 | 1408 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 IM |
1409 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
1410 | para_state = kmap_atomic(para_state_page, KM_USER0); | |
1411 | ||
1412 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1413 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1414 | ||
1415 | para_state->host_version = KVM_PARA_API_VERSION; | |
1416 | /* | |
1417 | * We cannot support guests that try to register themselves | |
1418 | * with a newer API version than the host supports: | |
1419 | */ | |
1420 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1421 | para_state->ret = -KVM_EINVAL; | |
1422 | goto err_kunmap_skip; | |
1423 | } | |
1424 | ||
1425 | hypercall_gpa = para_state->hypercall_gpa; | |
1426 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1427 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1428 | if (is_error_hpa(hypercall_hpa)) { | |
1429 | para_state->ret = -KVM_EINVAL; | |
1430 | goto err_kunmap_skip; | |
1431 | } | |
1432 | ||
1433 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1434 | vcpu->para_state_page = para_state_page; | |
1435 | vcpu->para_state_gpa = para_state_gpa; | |
1436 | vcpu->hypercall_gpa = hypercall_gpa; | |
1437 | ||
ab51a434 | 1438 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1439 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1440 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1441 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1442 | kunmap_atomic(hypercall, KM_USER1); | |
1443 | ||
1444 | para_state->ret = 0; | |
1445 | err_kunmap_skip: | |
1446 | kunmap_atomic(para_state, KM_USER0); | |
1447 | return 0; | |
1448 | err_gp: | |
1449 | return 1; | |
1450 | } | |
1451 | ||
3bab1f5d AK |
1452 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1453 | { | |
1454 | u64 data; | |
1455 | ||
1456 | switch (msr) { | |
1457 | case 0xc0010010: /* SYSCFG */ | |
1458 | case 0xc0010015: /* HWCR */ | |
1459 | case MSR_IA32_PLATFORM_ID: | |
1460 | case MSR_IA32_P5_MC_ADDR: | |
1461 | case MSR_IA32_P5_MC_TYPE: | |
1462 | case MSR_IA32_MC0_CTL: | |
1463 | case MSR_IA32_MCG_STATUS: | |
1464 | case MSR_IA32_MCG_CAP: | |
1465 | case MSR_IA32_MC0_MISC: | |
1466 | case MSR_IA32_MC0_MISC+4: | |
1467 | case MSR_IA32_MC0_MISC+8: | |
1468 | case MSR_IA32_MC0_MISC+12: | |
1469 | case MSR_IA32_MC0_MISC+16: | |
1470 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1471 | case MSR_IA32_PERF_STATUS: |
3bab1f5d AK |
1472 | /* MTRR registers */ |
1473 | case 0xfe: | |
1474 | case 0x200 ... 0x2ff: | |
1475 | data = 0; | |
1476 | break; | |
a8d13ea2 AK |
1477 | case 0xcd: /* fsb frequency */ |
1478 | data = 3; | |
1479 | break; | |
3bab1f5d AK |
1480 | case MSR_IA32_APICBASE: |
1481 | data = vcpu->apic_base; | |
1482 | break; | |
6f00e68f AK |
1483 | case MSR_IA32_MISC_ENABLE: |
1484 | data = vcpu->ia32_misc_enable_msr; | |
1485 | break; | |
3bab1f5d AK |
1486 | #ifdef CONFIG_X86_64 |
1487 | case MSR_EFER: | |
1488 | data = vcpu->shadow_efer; | |
1489 | break; | |
1490 | #endif | |
1491 | default: | |
1492 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr); | |
1493 | return 1; | |
1494 | } | |
1495 | *pdata = data; | |
1496 | return 0; | |
1497 | } | |
1498 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1499 | ||
6aa8b732 AK |
1500 | /* |
1501 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1502 | * Returns 0 on success, non-0 otherwise. | |
1503 | * Assumes vcpu_load() was already called. | |
1504 | */ | |
1505 | static int get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1506 | { | |
1507 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1508 | } | |
1509 | ||
05b3e0c2 | 1510 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1511 | |
3bab1f5d | 1512 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1513 | { |
6aa8b732 AK |
1514 | if (efer & EFER_RESERVED_BITS) { |
1515 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1516 | efer); | |
1517 | inject_gp(vcpu); | |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | if (is_paging(vcpu) | |
1522 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1523 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1524 | inject_gp(vcpu); | |
1525 | return; | |
1526 | } | |
1527 | ||
7725f0ba AK |
1528 | kvm_arch_ops->set_efer(vcpu, efer); |
1529 | ||
6aa8b732 AK |
1530 | efer &= ~EFER_LMA; |
1531 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1532 | ||
1533 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1534 | } |
6aa8b732 AK |
1535 | |
1536 | #endif | |
1537 | ||
3bab1f5d AK |
1538 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1539 | { | |
1540 | switch (msr) { | |
1541 | #ifdef CONFIG_X86_64 | |
1542 | case MSR_EFER: | |
1543 | set_efer(vcpu, data); | |
1544 | break; | |
1545 | #endif | |
1546 | case MSR_IA32_MC0_STATUS: | |
1547 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
1548 | __FUNCTION__, data); | |
1549 | break; | |
0e5bf0d0 SK |
1550 | case MSR_IA32_MCG_STATUS: |
1551 | printk(KERN_WARNING "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
1552 | __FUNCTION__, data); | |
1553 | break; | |
3bab1f5d AK |
1554 | case MSR_IA32_UCODE_REV: |
1555 | case MSR_IA32_UCODE_WRITE: | |
1556 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1557 | break; | |
1558 | case MSR_IA32_APICBASE: | |
1559 | vcpu->apic_base = data; | |
1560 | break; | |
6f00e68f AK |
1561 | case MSR_IA32_MISC_ENABLE: |
1562 | vcpu->ia32_misc_enable_msr = data; | |
1563 | break; | |
102d8325 IM |
1564 | /* |
1565 | * This is the 'probe whether the host is KVM' logic: | |
1566 | */ | |
1567 | case MSR_KVM_API_MAGIC: | |
1568 | return vcpu_register_para(vcpu, data); | |
1569 | ||
3bab1f5d AK |
1570 | default: |
1571 | printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr); | |
1572 | return 1; | |
1573 | } | |
1574 | return 0; | |
1575 | } | |
1576 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1577 | ||
6aa8b732 AK |
1578 | /* |
1579 | * Writes msr value into into the appropriate "register". | |
1580 | * Returns 0 on success, non-0 otherwise. | |
1581 | * Assumes vcpu_load() was already called. | |
1582 | */ | |
1583 | static int set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1584 | { | |
1585 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1586 | } | |
1587 | ||
1588 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1589 | { | |
3fca0365 YD |
1590 | if (!need_resched()) |
1591 | return; | |
6aa8b732 AK |
1592 | vcpu_put(vcpu); |
1593 | cond_resched(); | |
bccf2150 | 1594 | vcpu_load(vcpu); |
6aa8b732 AK |
1595 | } |
1596 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1597 | ||
1598 | void load_msrs(struct vmx_msr_entry *e, int n) | |
1599 | { | |
1600 | int i; | |
1601 | ||
1602 | for (i = 0; i < n; ++i) | |
1603 | wrmsrl(e[i].index, e[i].data); | |
1604 | } | |
1605 | EXPORT_SYMBOL_GPL(load_msrs); | |
1606 | ||
1607 | void save_msrs(struct vmx_msr_entry *e, int n) | |
1608 | { | |
1609 | int i; | |
1610 | ||
1611 | for (i = 0; i < n; ++i) | |
1612 | rdmsrl(e[i].index, e[i].data); | |
1613 | } | |
1614 | EXPORT_SYMBOL_GPL(save_msrs); | |
1615 | ||
06465c5a AK |
1616 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1617 | { | |
1618 | int i; | |
1619 | u32 function; | |
1620 | struct kvm_cpuid_entry *e, *best; | |
1621 | ||
1622 | kvm_arch_ops->cache_regs(vcpu); | |
1623 | function = vcpu->regs[VCPU_REGS_RAX]; | |
1624 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1625 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1626 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1627 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1628 | best = NULL; | |
1629 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1630 | e = &vcpu->cpuid_entries[i]; | |
1631 | if (e->function == function) { | |
1632 | best = e; | |
1633 | break; | |
1634 | } | |
1635 | /* | |
1636 | * Both basic or both extended? | |
1637 | */ | |
1638 | if (((e->function ^ function) & 0x80000000) == 0) | |
1639 | if (!best || e->function > best->function) | |
1640 | best = e; | |
1641 | } | |
1642 | if (best) { | |
1643 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1644 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1645 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1646 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1647 | } | |
1648 | kvm_arch_ops->decache_regs(vcpu); | |
1649 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1650 | } | |
1651 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1652 | ||
039576c0 | 1653 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1654 | { |
039576c0 AK |
1655 | void *p = vcpu->pio_data; |
1656 | void *q; | |
1657 | unsigned bytes; | |
1658 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1659 | ||
1660 | kvm_arch_ops->vcpu_put(vcpu); | |
1661 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, | |
1662 | PAGE_KERNEL); | |
1663 | if (!q) { | |
1664 | kvm_arch_ops->vcpu_load(vcpu); | |
1665 | free_pio_guest_pages(vcpu); | |
1666 | return -ENOMEM; | |
1667 | } | |
1668 | q += vcpu->pio.guest_page_offset; | |
1669 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1670 | if (vcpu->pio.in) | |
1671 | memcpy(q, p, bytes); | |
1672 | else | |
1673 | memcpy(p, q, bytes); | |
1674 | q -= vcpu->pio.guest_page_offset; | |
1675 | vunmap(q); | |
1676 | kvm_arch_ops->vcpu_load(vcpu); | |
1677 | free_pio_guest_pages(vcpu); | |
1678 | return 0; | |
1679 | } | |
1680 | ||
1681 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1682 | { | |
1683 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1684 | long delta; |
039576c0 | 1685 | int r; |
46fc1477 AK |
1686 | |
1687 | kvm_arch_ops->cache_regs(vcpu); | |
1688 | ||
1689 | if (!io->string) { | |
039576c0 AK |
1690 | if (io->in) |
1691 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1692 | io->size); |
1693 | } else { | |
039576c0 AK |
1694 | if (io->in) { |
1695 | r = pio_copy_data(vcpu); | |
1696 | if (r) { | |
1697 | kvm_arch_ops->cache_regs(vcpu); | |
1698 | return r; | |
1699 | } | |
1700 | } | |
1701 | ||
46fc1477 AK |
1702 | delta = 1; |
1703 | if (io->rep) { | |
039576c0 | 1704 | delta *= io->cur_count; |
46fc1477 AK |
1705 | /* |
1706 | * The size of the register should really depend on | |
1707 | * current address size. | |
1708 | */ | |
1709 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1710 | } | |
039576c0 | 1711 | if (io->down) |
46fc1477 AK |
1712 | delta = -delta; |
1713 | delta *= io->size; | |
039576c0 | 1714 | if (io->in) |
46fc1477 AK |
1715 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1716 | else | |
1717 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1718 | } | |
1719 | ||
46fc1477 AK |
1720 | kvm_arch_ops->decache_regs(vcpu); |
1721 | ||
039576c0 AK |
1722 | io->count -= io->cur_count; |
1723 | io->cur_count = 0; | |
1724 | ||
1725 | if (!io->count) | |
1726 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1727 | return 0; | |
46fc1477 AK |
1728 | } |
1729 | ||
039576c0 AK |
1730 | int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
1731 | int size, unsigned long count, int string, int down, | |
1732 | gva_t address, int rep, unsigned port) | |
1733 | { | |
1734 | unsigned now, in_page; | |
1735 | int i; | |
1736 | int nr_pages = 1; | |
1737 | struct page *page; | |
1738 | ||
1739 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1740 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1741 | vcpu->run->io.size = size; | |
1742 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1743 | vcpu->run->io.count = count; | |
1744 | vcpu->run->io.port = port; | |
1745 | vcpu->pio.count = count; | |
1746 | vcpu->pio.cur_count = count; | |
1747 | vcpu->pio.size = size; | |
1748 | vcpu->pio.in = in; | |
1749 | vcpu->pio.string = string; | |
1750 | vcpu->pio.down = down; | |
1751 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
1752 | vcpu->pio.rep = rep; | |
1753 | ||
1754 | if (!string) { | |
1755 | kvm_arch_ops->cache_regs(vcpu); | |
1756 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); | |
1757 | kvm_arch_ops->decache_regs(vcpu); | |
1758 | return 0; | |
1759 | } | |
1760 | ||
1761 | if (!count) { | |
1762 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1763 | return 1; | |
1764 | } | |
1765 | ||
1766 | now = min(count, PAGE_SIZE / size); | |
1767 | ||
1768 | if (!down) | |
1769 | in_page = PAGE_SIZE - offset_in_page(address); | |
1770 | else | |
1771 | in_page = offset_in_page(address) + size; | |
1772 | now = min(count, (unsigned long)in_page / size); | |
1773 | if (!now) { | |
1774 | /* | |
1775 | * String I/O straddles page boundary. Pin two guest pages | |
1776 | * so that we satisfy atomicity constraints. Do just one | |
1777 | * transaction to avoid complexity. | |
1778 | */ | |
1779 | nr_pages = 2; | |
1780 | now = 1; | |
1781 | } | |
1782 | if (down) { | |
1783 | /* | |
1784 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
1785 | */ | |
1786 | printk(KERN_ERR "kvm: guest string pio down\n"); | |
1787 | inject_gp(vcpu); | |
1788 | return 1; | |
1789 | } | |
1790 | vcpu->run->io.count = now; | |
1791 | vcpu->pio.cur_count = now; | |
1792 | ||
1793 | for (i = 0; i < nr_pages; ++i) { | |
1794 | spin_lock(&vcpu->kvm->lock); | |
1795 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); | |
1796 | if (page) | |
1797 | get_page(page); | |
1798 | vcpu->pio.guest_pages[i] = page; | |
1799 | spin_unlock(&vcpu->kvm->lock); | |
1800 | if (!page) { | |
1801 | inject_gp(vcpu); | |
1802 | free_pio_guest_pages(vcpu); | |
1803 | return 1; | |
1804 | } | |
1805 | } | |
1806 | ||
1807 | if (!vcpu->pio.in) | |
1808 | return pio_copy_data(vcpu); | |
1809 | return 0; | |
1810 | } | |
1811 | EXPORT_SYMBOL_GPL(kvm_setup_pio); | |
1812 | ||
bccf2150 | 1813 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1814 | { |
6aa8b732 | 1815 | int r; |
1961d276 | 1816 | sigset_t sigsaved; |
6aa8b732 | 1817 | |
bccf2150 | 1818 | vcpu_load(vcpu); |
6aa8b732 | 1819 | |
1961d276 AK |
1820 | if (vcpu->sigset_active) |
1821 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1822 | ||
54810342 DL |
1823 | /* re-sync apic's tpr */ |
1824 | vcpu->cr8 = kvm_run->cr8; | |
1825 | ||
02c83209 AK |
1826 | if (vcpu->pio.cur_count) { |
1827 | r = complete_pio(vcpu); | |
1828 | if (r) | |
1829 | goto out; | |
1830 | } | |
1831 | ||
1832 | if (vcpu->mmio_needed) { | |
1833 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
1834 | vcpu->mmio_read_completed = 1; | |
1835 | vcpu->mmio_needed = 0; | |
1836 | r = emulate_instruction(vcpu, kvm_run, | |
1837 | vcpu->mmio_fault_cr2, 0); | |
1838 | if (r == EMULATE_DO_MMIO) { | |
1839 | /* | |
1840 | * Read-modify-write. Back to userspace. | |
1841 | */ | |
1842 | kvm_run->exit_reason = KVM_EXIT_MMIO; | |
1843 | r = 0; | |
1844 | goto out; | |
46fc1477 | 1845 | } |
6aa8b732 AK |
1846 | } |
1847 | ||
8eb7d334 | 1848 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
b4e63f56 AK |
1849 | kvm_arch_ops->cache_regs(vcpu); |
1850 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; | |
1851 | kvm_arch_ops->decache_regs(vcpu); | |
1852 | } | |
1853 | ||
6aa8b732 AK |
1854 | r = kvm_arch_ops->run(vcpu, kvm_run); |
1855 | ||
039576c0 | 1856 | out: |
1961d276 AK |
1857 | if (vcpu->sigset_active) |
1858 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1859 | ||
6aa8b732 AK |
1860 | vcpu_put(vcpu); |
1861 | return r; | |
1862 | } | |
1863 | ||
bccf2150 AK |
1864 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
1865 | struct kvm_regs *regs) | |
6aa8b732 | 1866 | { |
bccf2150 | 1867 | vcpu_load(vcpu); |
6aa8b732 AK |
1868 | |
1869 | kvm_arch_ops->cache_regs(vcpu); | |
1870 | ||
1871 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
1872 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
1873 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
1874 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
1875 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
1876 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
1877 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
1878 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 1879 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1880 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
1881 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
1882 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
1883 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
1884 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
1885 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
1886 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
1887 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
1888 | #endif | |
1889 | ||
1890 | regs->rip = vcpu->rip; | |
1891 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
1892 | ||
1893 | /* | |
1894 | * Don't leak debug flags in case they were set for guest debugging | |
1895 | */ | |
1896 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
1897 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1898 | ||
1899 | vcpu_put(vcpu); | |
1900 | ||
1901 | return 0; | |
1902 | } | |
1903 | ||
bccf2150 AK |
1904 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
1905 | struct kvm_regs *regs) | |
6aa8b732 | 1906 | { |
bccf2150 | 1907 | vcpu_load(vcpu); |
6aa8b732 AK |
1908 | |
1909 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
1910 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
1911 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
1912 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
1913 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
1914 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
1915 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
1916 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 1917 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1918 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
1919 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
1920 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
1921 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
1922 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
1923 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
1924 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
1925 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
1926 | #endif | |
1927 | ||
1928 | vcpu->rip = regs->rip; | |
1929 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
1930 | ||
1931 | kvm_arch_ops->decache_regs(vcpu); | |
1932 | ||
1933 | vcpu_put(vcpu); | |
1934 | ||
1935 | return 0; | |
1936 | } | |
1937 | ||
1938 | static void get_segment(struct kvm_vcpu *vcpu, | |
1939 | struct kvm_segment *var, int seg) | |
1940 | { | |
1941 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
1942 | } | |
1943 | ||
bccf2150 AK |
1944 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
1945 | struct kvm_sregs *sregs) | |
6aa8b732 | 1946 | { |
6aa8b732 AK |
1947 | struct descriptor_table dt; |
1948 | ||
bccf2150 | 1949 | vcpu_load(vcpu); |
6aa8b732 AK |
1950 | |
1951 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
1952 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
1953 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
1954 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
1955 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
1956 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
1957 | ||
1958 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
1959 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
1960 | ||
1961 | kvm_arch_ops->get_idt(vcpu, &dt); | |
1962 | sregs->idt.limit = dt.limit; | |
1963 | sregs->idt.base = dt.base; | |
1964 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
1965 | sregs->gdt.limit = dt.limit; | |
1966 | sregs->gdt.base = dt.base; | |
1967 | ||
25c4c276 | 1968 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1969 | sregs->cr0 = vcpu->cr0; |
1970 | sregs->cr2 = vcpu->cr2; | |
1971 | sregs->cr3 = vcpu->cr3; | |
1972 | sregs->cr4 = vcpu->cr4; | |
1973 | sregs->cr8 = vcpu->cr8; | |
1974 | sregs->efer = vcpu->shadow_efer; | |
1975 | sregs->apic_base = vcpu->apic_base; | |
1976 | ||
1977 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
1978 | sizeof sregs->interrupt_bitmap); | |
1979 | ||
1980 | vcpu_put(vcpu); | |
1981 | ||
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | static void set_segment(struct kvm_vcpu *vcpu, | |
1986 | struct kvm_segment *var, int seg) | |
1987 | { | |
1988 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
1989 | } | |
1990 | ||
bccf2150 AK |
1991 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
1992 | struct kvm_sregs *sregs) | |
6aa8b732 | 1993 | { |
6aa8b732 AK |
1994 | int mmu_reset_needed = 0; |
1995 | int i; | |
1996 | struct descriptor_table dt; | |
1997 | ||
bccf2150 | 1998 | vcpu_load(vcpu); |
6aa8b732 | 1999 | |
6aa8b732 AK |
2000 | dt.limit = sregs->idt.limit; |
2001 | dt.base = sregs->idt.base; | |
2002 | kvm_arch_ops->set_idt(vcpu, &dt); | |
2003 | dt.limit = sregs->gdt.limit; | |
2004 | dt.base = sregs->gdt.base; | |
2005 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
2006 | ||
2007 | vcpu->cr2 = sregs->cr2; | |
2008 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2009 | vcpu->cr3 = sregs->cr3; | |
2010 | ||
2011 | vcpu->cr8 = sregs->cr8; | |
2012 | ||
2013 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2014 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2015 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
2016 | #endif | |
2017 | vcpu->apic_base = sregs->apic_base; | |
2018 | ||
25c4c276 | 2019 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
399badf3 | 2020 | |
6aa8b732 | 2021 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
f6528b03 | 2022 | kvm_arch_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2023 | |
2024 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
2025 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
2026 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2027 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2028 | |
2029 | if (mmu_reset_needed) | |
2030 | kvm_mmu_reset_context(vcpu); | |
2031 | ||
2032 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2033 | sizeof vcpu->irq_pending); | |
2034 | vcpu->irq_summary = 0; | |
2035 | for (i = 0; i < NR_IRQ_WORDS; ++i) | |
2036 | if (vcpu->irq_pending[i]) | |
2037 | __set_bit(i, &vcpu->irq_summary); | |
2038 | ||
024aa1c0 AK |
2039 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2040 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2041 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2042 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2043 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2044 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2045 | ||
2046 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2047 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2048 | ||
6aa8b732 AK |
2049 | vcpu_put(vcpu); |
2050 | ||
2051 | return 0; | |
2052 | } | |
2053 | ||
2054 | /* | |
2055 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2056 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2057 | * |
2058 | * This list is modified at module load time to reflect the | |
2059 | * capabilities of the host cpu. | |
6aa8b732 AK |
2060 | */ |
2061 | static u32 msrs_to_save[] = { | |
2062 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2063 | MSR_K6_STAR, | |
05b3e0c2 | 2064 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2065 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2066 | #endif | |
2067 | MSR_IA32_TIME_STAMP_COUNTER, | |
2068 | }; | |
2069 | ||
bf591b24 MR |
2070 | static unsigned num_msrs_to_save; |
2071 | ||
6f00e68f AK |
2072 | static u32 emulated_msrs[] = { |
2073 | MSR_IA32_MISC_ENABLE, | |
2074 | }; | |
2075 | ||
bf591b24 MR |
2076 | static __init void kvm_init_msr_list(void) |
2077 | { | |
2078 | u32 dummy[2]; | |
2079 | unsigned i, j; | |
2080 | ||
2081 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2082 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2083 | continue; | |
2084 | if (j < i) | |
2085 | msrs_to_save[j] = msrs_to_save[i]; | |
2086 | j++; | |
2087 | } | |
2088 | num_msrs_to_save = j; | |
2089 | } | |
6aa8b732 AK |
2090 | |
2091 | /* | |
2092 | * Adapt set_msr() to msr_io()'s calling convention | |
2093 | */ | |
2094 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2095 | { | |
2096 | return set_msr(vcpu, index, *data); | |
2097 | } | |
2098 | ||
2099 | /* | |
2100 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2101 | * | |
2102 | * @return number of msrs set successfully. | |
2103 | */ | |
bccf2150 | 2104 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2105 | struct kvm_msr_entry *entries, |
2106 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2107 | unsigned index, u64 *data)) | |
2108 | { | |
6aa8b732 AK |
2109 | int i; |
2110 | ||
bccf2150 | 2111 | vcpu_load(vcpu); |
6aa8b732 AK |
2112 | |
2113 | for (i = 0; i < msrs->nmsrs; ++i) | |
2114 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2115 | break; | |
2116 | ||
2117 | vcpu_put(vcpu); | |
2118 | ||
2119 | return i; | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2124 | * | |
2125 | * @return number of msrs set successfully. | |
2126 | */ | |
bccf2150 | 2127 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2128 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2129 | unsigned index, u64 *data), | |
2130 | int writeback) | |
2131 | { | |
2132 | struct kvm_msrs msrs; | |
2133 | struct kvm_msr_entry *entries; | |
2134 | int r, n; | |
2135 | unsigned size; | |
2136 | ||
2137 | r = -EFAULT; | |
2138 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2139 | goto out; | |
2140 | ||
2141 | r = -E2BIG; | |
2142 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2143 | goto out; | |
2144 | ||
2145 | r = -ENOMEM; | |
2146 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2147 | entries = vmalloc(size); | |
2148 | if (!entries) | |
2149 | goto out; | |
2150 | ||
2151 | r = -EFAULT; | |
2152 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2153 | goto out_free; | |
2154 | ||
bccf2150 | 2155 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2156 | if (r < 0) |
2157 | goto out_free; | |
2158 | ||
2159 | r = -EFAULT; | |
2160 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2161 | goto out_free; | |
2162 | ||
2163 | r = n; | |
2164 | ||
2165 | out_free: | |
2166 | vfree(entries); | |
2167 | out: | |
2168 | return r; | |
2169 | } | |
2170 | ||
2171 | /* | |
2172 | * Translate a guest virtual address to a guest physical address. | |
2173 | */ | |
bccf2150 AK |
2174 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2175 | struct kvm_translation *tr) | |
6aa8b732 AK |
2176 | { |
2177 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2178 | gpa_t gpa; |
2179 | ||
bccf2150 AK |
2180 | vcpu_load(vcpu); |
2181 | spin_lock(&vcpu->kvm->lock); | |
6aa8b732 AK |
2182 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2183 | tr->physical_address = gpa; | |
2184 | tr->valid = gpa != UNMAPPED_GVA; | |
2185 | tr->writeable = 1; | |
2186 | tr->usermode = 0; | |
bccf2150 | 2187 | spin_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2188 | vcpu_put(vcpu); |
2189 | ||
2190 | return 0; | |
2191 | } | |
2192 | ||
bccf2150 AK |
2193 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2194 | struct kvm_interrupt *irq) | |
6aa8b732 | 2195 | { |
6aa8b732 AK |
2196 | if (irq->irq < 0 || irq->irq >= 256) |
2197 | return -EINVAL; | |
bccf2150 | 2198 | vcpu_load(vcpu); |
6aa8b732 AK |
2199 | |
2200 | set_bit(irq->irq, vcpu->irq_pending); | |
2201 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2202 | ||
2203 | vcpu_put(vcpu); | |
2204 | ||
2205 | return 0; | |
2206 | } | |
2207 | ||
bccf2150 AK |
2208 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2209 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2210 | { |
6aa8b732 AK |
2211 | int r; |
2212 | ||
bccf2150 | 2213 | vcpu_load(vcpu); |
6aa8b732 AK |
2214 | |
2215 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
2216 | ||
2217 | vcpu_put(vcpu); | |
2218 | ||
2219 | return r; | |
2220 | } | |
2221 | ||
9a2bb7f4 AK |
2222 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2223 | unsigned long address, | |
2224 | int *type) | |
2225 | { | |
2226 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2227 | unsigned long pgoff; | |
2228 | struct page *page; | |
2229 | ||
2230 | *type = VM_FAULT_MINOR; | |
2231 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
039576c0 AK |
2232 | if (pgoff == 0) |
2233 | page = virt_to_page(vcpu->run); | |
2234 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2235 | page = virt_to_page(vcpu->pio_data); | |
2236 | else | |
9a2bb7f4 | 2237 | return NOPAGE_SIGBUS; |
9a2bb7f4 AK |
2238 | get_page(page); |
2239 | return page; | |
2240 | } | |
2241 | ||
2242 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2243 | .nopage = kvm_vcpu_nopage, | |
2244 | }; | |
2245 | ||
2246 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2247 | { | |
2248 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2249 | return 0; | |
2250 | } | |
2251 | ||
bccf2150 AK |
2252 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2253 | { | |
2254 | struct kvm_vcpu *vcpu = filp->private_data; | |
2255 | ||
2256 | fput(vcpu->kvm->filp); | |
2257 | return 0; | |
2258 | } | |
2259 | ||
2260 | static struct file_operations kvm_vcpu_fops = { | |
2261 | .release = kvm_vcpu_release, | |
2262 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2263 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2264 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2265 | }; |
2266 | ||
2267 | /* | |
2268 | * Allocates an inode for the vcpu. | |
2269 | */ | |
2270 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2271 | { | |
2272 | int fd, r; | |
2273 | struct inode *inode; | |
2274 | struct file *file; | |
2275 | ||
2276 | atomic_inc(&vcpu->kvm->filp->f_count); | |
2277 | inode = kvmfs_inode(&kvm_vcpu_fops); | |
2278 | if (IS_ERR(inode)) { | |
2279 | r = PTR_ERR(inode); | |
2280 | goto out1; | |
2281 | } | |
2282 | ||
2283 | file = kvmfs_file(inode, vcpu); | |
2284 | if (IS_ERR(file)) { | |
2285 | r = PTR_ERR(file); | |
2286 | goto out2; | |
2287 | } | |
2288 | ||
2289 | r = get_unused_fd(); | |
2290 | if (r < 0) | |
2291 | goto out3; | |
2292 | fd = r; | |
2293 | fd_install(fd, file); | |
2294 | ||
2295 | return fd; | |
2296 | ||
2297 | out3: | |
2298 | fput(file); | |
2299 | out2: | |
2300 | iput(inode); | |
2301 | out1: | |
2302 | fput(vcpu->kvm->filp); | |
2303 | return r; | |
2304 | } | |
2305 | ||
c5ea7660 AK |
2306 | /* |
2307 | * Creates some virtual cpus. Good luck creating more than one. | |
2308 | */ | |
2309 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2310 | { | |
2311 | int r; | |
2312 | struct kvm_vcpu *vcpu; | |
9a2bb7f4 | 2313 | struct page *page; |
c5ea7660 AK |
2314 | |
2315 | r = -EINVAL; | |
2316 | if (!valid_vcpu(n)) | |
2317 | goto out; | |
2318 | ||
2319 | vcpu = &kvm->vcpus[n]; | |
2320 | ||
2321 | mutex_lock(&vcpu->mutex); | |
2322 | ||
2323 | if (vcpu->vmcs) { | |
2324 | mutex_unlock(&vcpu->mutex); | |
2325 | return -EEXIST; | |
2326 | } | |
2327 | ||
9a2bb7f4 AK |
2328 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2329 | r = -ENOMEM; | |
2330 | if (!page) | |
2331 | goto out_unlock; | |
2332 | vcpu->run = page_address(page); | |
2333 | ||
039576c0 AK |
2334 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2335 | r = -ENOMEM; | |
2336 | if (!page) | |
2337 | goto out_free_run; | |
2338 | vcpu->pio_data = page_address(page); | |
2339 | ||
c5ea7660 AK |
2340 | vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf, |
2341 | FX_IMAGE_ALIGN); | |
2342 | vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE; | |
d917a6b9 | 2343 | vcpu->cr0 = 0x10; |
c5ea7660 AK |
2344 | |
2345 | r = kvm_arch_ops->vcpu_create(vcpu); | |
2346 | if (r < 0) | |
2347 | goto out_free_vcpus; | |
2348 | ||
2349 | r = kvm_mmu_create(vcpu); | |
2350 | if (r < 0) | |
2351 | goto out_free_vcpus; | |
2352 | ||
2353 | kvm_arch_ops->vcpu_load(vcpu); | |
2354 | r = kvm_mmu_setup(vcpu); | |
2355 | if (r >= 0) | |
2356 | r = kvm_arch_ops->vcpu_setup(vcpu); | |
2357 | vcpu_put(vcpu); | |
2358 | ||
2359 | if (r < 0) | |
2360 | goto out_free_vcpus; | |
2361 | ||
bccf2150 AK |
2362 | r = create_vcpu_fd(vcpu); |
2363 | if (r < 0) | |
2364 | goto out_free_vcpus; | |
2365 | ||
2366 | return r; | |
c5ea7660 AK |
2367 | |
2368 | out_free_vcpus: | |
2369 | kvm_free_vcpu(vcpu); | |
039576c0 AK |
2370 | out_free_run: |
2371 | free_page((unsigned long)vcpu->run); | |
2372 | vcpu->run = NULL; | |
9a2bb7f4 | 2373 | out_unlock: |
c5ea7660 AK |
2374 | mutex_unlock(&vcpu->mutex); |
2375 | out: | |
2376 | return r; | |
2377 | } | |
2378 | ||
06465c5a AK |
2379 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2380 | struct kvm_cpuid *cpuid, | |
2381 | struct kvm_cpuid_entry __user *entries) | |
2382 | { | |
2383 | int r; | |
2384 | ||
2385 | r = -E2BIG; | |
2386 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2387 | goto out; | |
2388 | r = -EFAULT; | |
2389 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2390 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2391 | goto out; | |
2392 | vcpu->cpuid_nent = cpuid->nent; | |
2393 | return 0; | |
2394 | ||
2395 | out: | |
2396 | return r; | |
2397 | } | |
2398 | ||
1961d276 AK |
2399 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2400 | { | |
2401 | if (sigset) { | |
2402 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2403 | vcpu->sigset_active = 1; | |
2404 | vcpu->sigset = *sigset; | |
2405 | } else | |
2406 | vcpu->sigset_active = 0; | |
2407 | return 0; | |
2408 | } | |
2409 | ||
b8836737 AK |
2410 | /* |
2411 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2412 | * we have asm/x86/processor.h | |
2413 | */ | |
2414 | struct fxsave { | |
2415 | u16 cwd; | |
2416 | u16 swd; | |
2417 | u16 twd; | |
2418 | u16 fop; | |
2419 | u64 rip; | |
2420 | u64 rdp; | |
2421 | u32 mxcsr; | |
2422 | u32 mxcsr_mask; | |
2423 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2424 | #ifdef CONFIG_X86_64 | |
2425 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2426 | #else | |
2427 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2428 | #endif | |
2429 | }; | |
2430 | ||
2431 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2432 | { | |
2433 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2434 | ||
2435 | vcpu_load(vcpu); | |
2436 | ||
2437 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2438 | fpu->fcw = fxsave->cwd; | |
2439 | fpu->fsw = fxsave->swd; | |
2440 | fpu->ftwx = fxsave->twd; | |
2441 | fpu->last_opcode = fxsave->fop; | |
2442 | fpu->last_ip = fxsave->rip; | |
2443 | fpu->last_dp = fxsave->rdp; | |
2444 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2445 | ||
2446 | vcpu_put(vcpu); | |
2447 | ||
2448 | return 0; | |
2449 | } | |
2450 | ||
2451 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2452 | { | |
2453 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2454 | ||
2455 | vcpu_load(vcpu); | |
2456 | ||
2457 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2458 | fxsave->cwd = fpu->fcw; | |
2459 | fxsave->swd = fpu->fsw; | |
2460 | fxsave->twd = fpu->ftwx; | |
2461 | fxsave->fop = fpu->last_opcode; | |
2462 | fxsave->rip = fpu->last_ip; | |
2463 | fxsave->rdp = fpu->last_dp; | |
2464 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2465 | ||
2466 | vcpu_put(vcpu); | |
2467 | ||
2468 | return 0; | |
2469 | } | |
2470 | ||
bccf2150 AK |
2471 | static long kvm_vcpu_ioctl(struct file *filp, |
2472 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2473 | { |
bccf2150 | 2474 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2475 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2476 | int r = -EINVAL; |
2477 | ||
2478 | switch (ioctl) { | |
9a2bb7f4 | 2479 | case KVM_RUN: |
f0fe5108 AK |
2480 | r = -EINVAL; |
2481 | if (arg) | |
2482 | goto out; | |
9a2bb7f4 | 2483 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2484 | break; |
6aa8b732 AK |
2485 | case KVM_GET_REGS: { |
2486 | struct kvm_regs kvm_regs; | |
2487 | ||
bccf2150 AK |
2488 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2489 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2490 | if (r) |
2491 | goto out; | |
2492 | r = -EFAULT; | |
2f366987 | 2493 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2494 | goto out; |
2495 | r = 0; | |
2496 | break; | |
2497 | } | |
2498 | case KVM_SET_REGS: { | |
2499 | struct kvm_regs kvm_regs; | |
2500 | ||
2501 | r = -EFAULT; | |
2f366987 | 2502 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2503 | goto out; |
bccf2150 | 2504 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2505 | if (r) |
2506 | goto out; | |
2507 | r = 0; | |
2508 | break; | |
2509 | } | |
2510 | case KVM_GET_SREGS: { | |
2511 | struct kvm_sregs kvm_sregs; | |
2512 | ||
bccf2150 AK |
2513 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2514 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2515 | if (r) |
2516 | goto out; | |
2517 | r = -EFAULT; | |
2f366987 | 2518 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2519 | goto out; |
2520 | r = 0; | |
2521 | break; | |
2522 | } | |
2523 | case KVM_SET_SREGS: { | |
2524 | struct kvm_sregs kvm_sregs; | |
2525 | ||
2526 | r = -EFAULT; | |
2f366987 | 2527 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2528 | goto out; |
bccf2150 | 2529 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2530 | if (r) |
2531 | goto out; | |
2532 | r = 0; | |
2533 | break; | |
2534 | } | |
2535 | case KVM_TRANSLATE: { | |
2536 | struct kvm_translation tr; | |
2537 | ||
2538 | r = -EFAULT; | |
2f366987 | 2539 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2540 | goto out; |
bccf2150 | 2541 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2542 | if (r) |
2543 | goto out; | |
2544 | r = -EFAULT; | |
2f366987 | 2545 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2546 | goto out; |
2547 | r = 0; | |
2548 | break; | |
2549 | } | |
2550 | case KVM_INTERRUPT: { | |
2551 | struct kvm_interrupt irq; | |
2552 | ||
2553 | r = -EFAULT; | |
2f366987 | 2554 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2555 | goto out; |
bccf2150 | 2556 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2557 | if (r) |
2558 | goto out; | |
2559 | r = 0; | |
2560 | break; | |
2561 | } | |
2562 | case KVM_DEBUG_GUEST: { | |
2563 | struct kvm_debug_guest dbg; | |
2564 | ||
2565 | r = -EFAULT; | |
2f366987 | 2566 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2567 | goto out; |
bccf2150 | 2568 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2569 | if (r) |
2570 | goto out; | |
2571 | r = 0; | |
2572 | break; | |
2573 | } | |
bccf2150 AK |
2574 | case KVM_GET_MSRS: |
2575 | r = msr_io(vcpu, argp, get_msr, 1); | |
2576 | break; | |
2577 | case KVM_SET_MSRS: | |
2578 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2579 | break; | |
06465c5a AK |
2580 | case KVM_SET_CPUID: { |
2581 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2582 | struct kvm_cpuid cpuid; | |
2583 | ||
2584 | r = -EFAULT; | |
2585 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2586 | goto out; | |
2587 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2588 | if (r) | |
2589 | goto out; | |
2590 | break; | |
2591 | } | |
1961d276 AK |
2592 | case KVM_SET_SIGNAL_MASK: { |
2593 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2594 | struct kvm_signal_mask kvm_sigmask; | |
2595 | sigset_t sigset, *p; | |
2596 | ||
2597 | p = NULL; | |
2598 | if (argp) { | |
2599 | r = -EFAULT; | |
2600 | if (copy_from_user(&kvm_sigmask, argp, | |
2601 | sizeof kvm_sigmask)) | |
2602 | goto out; | |
2603 | r = -EINVAL; | |
2604 | if (kvm_sigmask.len != sizeof sigset) | |
2605 | goto out; | |
2606 | r = -EFAULT; | |
2607 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2608 | sizeof sigset)) | |
2609 | goto out; | |
2610 | p = &sigset; | |
2611 | } | |
2612 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2613 | break; | |
2614 | } | |
b8836737 AK |
2615 | case KVM_GET_FPU: { |
2616 | struct kvm_fpu fpu; | |
2617 | ||
2618 | memset(&fpu, 0, sizeof fpu); | |
2619 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
2620 | if (r) | |
2621 | goto out; | |
2622 | r = -EFAULT; | |
2623 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
2624 | goto out; | |
2625 | r = 0; | |
2626 | break; | |
2627 | } | |
2628 | case KVM_SET_FPU: { | |
2629 | struct kvm_fpu fpu; | |
2630 | ||
2631 | r = -EFAULT; | |
2632 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
2633 | goto out; | |
2634 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
2635 | if (r) | |
2636 | goto out; | |
2637 | r = 0; | |
2638 | break; | |
2639 | } | |
bccf2150 AK |
2640 | default: |
2641 | ; | |
2642 | } | |
2643 | out: | |
2644 | return r; | |
2645 | } | |
2646 | ||
2647 | static long kvm_vm_ioctl(struct file *filp, | |
2648 | unsigned int ioctl, unsigned long arg) | |
2649 | { | |
2650 | struct kvm *kvm = filp->private_data; | |
2651 | void __user *argp = (void __user *)arg; | |
2652 | int r = -EINVAL; | |
2653 | ||
2654 | switch (ioctl) { | |
2655 | case KVM_CREATE_VCPU: | |
2656 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2657 | if (r < 0) | |
2658 | goto out; | |
2659 | break; | |
6aa8b732 AK |
2660 | case KVM_SET_MEMORY_REGION: { |
2661 | struct kvm_memory_region kvm_mem; | |
2662 | ||
2663 | r = -EFAULT; | |
2f366987 | 2664 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2665 | goto out; |
2c6f5df9 | 2666 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2667 | if (r) |
2668 | goto out; | |
2669 | break; | |
2670 | } | |
2671 | case KVM_GET_DIRTY_LOG: { | |
2672 | struct kvm_dirty_log log; | |
2673 | ||
2674 | r = -EFAULT; | |
2f366987 | 2675 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2676 | goto out; |
2c6f5df9 | 2677 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2678 | if (r) |
2679 | goto out; | |
2680 | break; | |
2681 | } | |
e8207547 AK |
2682 | case KVM_SET_MEMORY_ALIAS: { |
2683 | struct kvm_memory_alias alias; | |
2684 | ||
2685 | r = -EFAULT; | |
2686 | if (copy_from_user(&alias, argp, sizeof alias)) | |
2687 | goto out; | |
2688 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
2689 | if (r) | |
2690 | goto out; | |
2691 | break; | |
2692 | } | |
f17abe9a AK |
2693 | default: |
2694 | ; | |
2695 | } | |
2696 | out: | |
2697 | return r; | |
2698 | } | |
2699 | ||
2700 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2701 | unsigned long address, | |
2702 | int *type) | |
2703 | { | |
2704 | struct kvm *kvm = vma->vm_file->private_data; | |
2705 | unsigned long pgoff; | |
f17abe9a AK |
2706 | struct page *page; |
2707 | ||
2708 | *type = VM_FAULT_MINOR; | |
2709 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
954bbbc2 | 2710 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
2711 | if (!page) |
2712 | return NOPAGE_SIGBUS; | |
2713 | get_page(page); | |
2714 | return page; | |
2715 | } | |
2716 | ||
2717 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2718 | .nopage = kvm_vm_nopage, | |
2719 | }; | |
2720 | ||
2721 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2722 | { | |
2723 | vma->vm_ops = &kvm_vm_vm_ops; | |
2724 | return 0; | |
2725 | } | |
2726 | ||
2727 | static struct file_operations kvm_vm_fops = { | |
2728 | .release = kvm_vm_release, | |
2729 | .unlocked_ioctl = kvm_vm_ioctl, | |
2730 | .compat_ioctl = kvm_vm_ioctl, | |
2731 | .mmap = kvm_vm_mmap, | |
2732 | }; | |
2733 | ||
2734 | static int kvm_dev_ioctl_create_vm(void) | |
2735 | { | |
2736 | int fd, r; | |
2737 | struct inode *inode; | |
2738 | struct file *file; | |
2739 | struct kvm *kvm; | |
2740 | ||
2741 | inode = kvmfs_inode(&kvm_vm_fops); | |
2742 | if (IS_ERR(inode)) { | |
2743 | r = PTR_ERR(inode); | |
2744 | goto out1; | |
2745 | } | |
2746 | ||
2747 | kvm = kvm_create_vm(); | |
2748 | if (IS_ERR(kvm)) { | |
2749 | r = PTR_ERR(kvm); | |
2750 | goto out2; | |
2751 | } | |
2752 | ||
2753 | file = kvmfs_file(inode, kvm); | |
2754 | if (IS_ERR(file)) { | |
2755 | r = PTR_ERR(file); | |
2756 | goto out3; | |
2757 | } | |
bccf2150 | 2758 | kvm->filp = file; |
f17abe9a AK |
2759 | |
2760 | r = get_unused_fd(); | |
2761 | if (r < 0) | |
2762 | goto out4; | |
2763 | fd = r; | |
2764 | fd_install(fd, file); | |
2765 | ||
2766 | return fd; | |
2767 | ||
2768 | out4: | |
2769 | fput(file); | |
2770 | out3: | |
2771 | kvm_destroy_vm(kvm); | |
2772 | out2: | |
2773 | iput(inode); | |
2774 | out1: | |
2775 | return r; | |
2776 | } | |
2777 | ||
2778 | static long kvm_dev_ioctl(struct file *filp, | |
2779 | unsigned int ioctl, unsigned long arg) | |
2780 | { | |
2781 | void __user *argp = (void __user *)arg; | |
07c45a36 | 2782 | long r = -EINVAL; |
f17abe9a AK |
2783 | |
2784 | switch (ioctl) { | |
2785 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2786 | r = -EINVAL; |
2787 | if (arg) | |
2788 | goto out; | |
f17abe9a AK |
2789 | r = KVM_API_VERSION; |
2790 | break; | |
2791 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2792 | r = -EINVAL; |
2793 | if (arg) | |
2794 | goto out; | |
f17abe9a AK |
2795 | r = kvm_dev_ioctl_create_vm(); |
2796 | break; | |
6aa8b732 | 2797 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 2798 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
2799 | struct kvm_msr_list msr_list; |
2800 | unsigned n; | |
2801 | ||
2802 | r = -EFAULT; | |
2803 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2804 | goto out; | |
2805 | n = msr_list.nmsrs; | |
6f00e68f | 2806 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
2807 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2808 | goto out; | |
2809 | r = -E2BIG; | |
bf591b24 | 2810 | if (n < num_msrs_to_save) |
6aa8b732 AK |
2811 | goto out; |
2812 | r = -EFAULT; | |
2813 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 2814 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 2815 | goto out; |
6f00e68f AK |
2816 | if (copy_to_user(user_msr_list->indices |
2817 | + num_msrs_to_save * sizeof(u32), | |
2818 | &emulated_msrs, | |
2819 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2820 | goto out; | |
6aa8b732 | 2821 | r = 0; |
cc1d8955 | 2822 | break; |
6aa8b732 | 2823 | } |
5d308f45 AK |
2824 | case KVM_CHECK_EXTENSION: |
2825 | /* | |
2826 | * No extensions defined at present. | |
2827 | */ | |
2828 | r = 0; | |
2829 | break; | |
07c45a36 AK |
2830 | case KVM_GET_VCPU_MMAP_SIZE: |
2831 | r = -EINVAL; | |
2832 | if (arg) | |
2833 | goto out; | |
039576c0 | 2834 | r = 2 * PAGE_SIZE; |
07c45a36 | 2835 | break; |
6aa8b732 AK |
2836 | default: |
2837 | ; | |
2838 | } | |
2839 | out: | |
2840 | return r; | |
2841 | } | |
2842 | ||
6aa8b732 AK |
2843 | static struct file_operations kvm_chardev_ops = { |
2844 | .open = kvm_dev_open, | |
2845 | .release = kvm_dev_release, | |
2846 | .unlocked_ioctl = kvm_dev_ioctl, | |
2847 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2848 | }; |
2849 | ||
2850 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2851 | KVM_MINOR, |
6aa8b732 AK |
2852 | "kvm", |
2853 | &kvm_chardev_ops, | |
2854 | }; | |
2855 | ||
2856 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, | |
2857 | void *v) | |
2858 | { | |
2859 | if (val == SYS_RESTART) { | |
2860 | /* | |
2861 | * Some (well, at least mine) BIOSes hang on reboot if | |
2862 | * in vmx root mode. | |
2863 | */ | |
2864 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
8b6d44c7 | 2865 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 AK |
2866 | } |
2867 | return NOTIFY_OK; | |
2868 | } | |
2869 | ||
2870 | static struct notifier_block kvm_reboot_notifier = { | |
2871 | .notifier_call = kvm_reboot, | |
2872 | .priority = 0, | |
2873 | }; | |
2874 | ||
774c47f1 AK |
2875 | /* |
2876 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
2877 | * cached on it. | |
2878 | */ | |
2879 | static void decache_vcpus_on_cpu(int cpu) | |
2880 | { | |
2881 | struct kvm *vm; | |
2882 | struct kvm_vcpu *vcpu; | |
2883 | int i; | |
2884 | ||
2885 | spin_lock(&kvm_lock); | |
2886 | list_for_each_entry(vm, &vm_list, vm_list) | |
2887 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
2888 | vcpu = &vm->vcpus[i]; | |
2889 | /* | |
2890 | * If the vcpu is locked, then it is running on some | |
2891 | * other cpu and therefore it is not cached on the | |
2892 | * cpu in question. | |
2893 | * | |
2894 | * If it's not locked, check the last cpu it executed | |
2895 | * on. | |
2896 | */ | |
2897 | if (mutex_trylock(&vcpu->mutex)) { | |
2898 | if (vcpu->cpu == cpu) { | |
2899 | kvm_arch_ops->vcpu_decache(vcpu); | |
2900 | vcpu->cpu = -1; | |
2901 | } | |
2902 | mutex_unlock(&vcpu->mutex); | |
2903 | } | |
2904 | } | |
2905 | spin_unlock(&kvm_lock); | |
2906 | } | |
2907 | ||
2908 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, | |
2909 | void *v) | |
2910 | { | |
2911 | int cpu = (long)v; | |
2912 | ||
2913 | switch (val) { | |
43934a38 | 2914 | case CPU_DOWN_PREPARE: |
8bb78442 | 2915 | case CPU_DOWN_PREPARE_FROZEN: |
774c47f1 | 2916 | case CPU_UP_CANCELED: |
8bb78442 | 2917 | case CPU_UP_CANCELED_FROZEN: |
43934a38 JK |
2918 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2919 | cpu); | |
774c47f1 AK |
2920 | decache_vcpus_on_cpu(cpu); |
2921 | smp_call_function_single(cpu, kvm_arch_ops->hardware_disable, | |
2922 | NULL, 0, 1); | |
2923 | break; | |
43934a38 | 2924 | case CPU_ONLINE: |
8bb78442 | 2925 | case CPU_ONLINE_FROZEN: |
43934a38 JK |
2926 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
2927 | cpu); | |
774c47f1 AK |
2928 | smp_call_function_single(cpu, kvm_arch_ops->hardware_enable, |
2929 | NULL, 0, 1); | |
2930 | break; | |
2931 | } | |
2932 | return NOTIFY_OK; | |
2933 | } | |
2934 | ||
2935 | static struct notifier_block kvm_cpu_notifier = { | |
2936 | .notifier_call = kvm_cpu_hotplug, | |
2937 | .priority = 20, /* must be > scheduler priority */ | |
2938 | }; | |
2939 | ||
1165f5fe AK |
2940 | static u64 stat_get(void *_offset) |
2941 | { | |
2942 | unsigned offset = (long)_offset; | |
2943 | u64 total = 0; | |
2944 | struct kvm *kvm; | |
2945 | struct kvm_vcpu *vcpu; | |
2946 | int i; | |
2947 | ||
2948 | spin_lock(&kvm_lock); | |
2949 | list_for_each_entry(kvm, &vm_list, vm_list) | |
2950 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
2951 | vcpu = &kvm->vcpus[i]; | |
2952 | total += *(u32 *)((void *)vcpu + offset); | |
2953 | } | |
2954 | spin_unlock(&kvm_lock); | |
2955 | return total; | |
2956 | } | |
2957 | ||
2958 | static void stat_set(void *offset, u64 val) | |
2959 | { | |
2960 | } | |
2961 | ||
2962 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, stat_set, "%llu\n"); | |
2963 | ||
6aa8b732 AK |
2964 | static __init void kvm_init_debug(void) |
2965 | { | |
2966 | struct kvm_stats_debugfs_item *p; | |
2967 | ||
8b6d44c7 | 2968 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 2969 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
2970 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
2971 | (void *)(long)p->offset, | |
2972 | &stat_fops); | |
6aa8b732 AK |
2973 | } |
2974 | ||
2975 | static void kvm_exit_debug(void) | |
2976 | { | |
2977 | struct kvm_stats_debugfs_item *p; | |
2978 | ||
2979 | for (p = debugfs_entries; p->name; ++p) | |
2980 | debugfs_remove(p->dentry); | |
2981 | debugfs_remove(debugfs_dir); | |
2982 | } | |
2983 | ||
59ae6c6b AK |
2984 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
2985 | { | |
2986 | decache_vcpus_on_cpu(raw_smp_processor_id()); | |
19d1408d | 2987 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
59ae6c6b AK |
2988 | return 0; |
2989 | } | |
2990 | ||
2991 | static int kvm_resume(struct sys_device *dev) | |
2992 | { | |
19d1408d | 2993 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
59ae6c6b AK |
2994 | return 0; |
2995 | } | |
2996 | ||
2997 | static struct sysdev_class kvm_sysdev_class = { | |
2998 | set_kset_name("kvm"), | |
2999 | .suspend = kvm_suspend, | |
3000 | .resume = kvm_resume, | |
3001 | }; | |
3002 | ||
3003 | static struct sys_device kvm_sysdev = { | |
3004 | .id = 0, | |
3005 | .cls = &kvm_sysdev_class, | |
3006 | }; | |
3007 | ||
6aa8b732 AK |
3008 | hpa_t bad_page_address; |
3009 | ||
37e29d90 AK |
3010 | static int kvmfs_get_sb(struct file_system_type *fs_type, int flags, |
3011 | const char *dev_name, void *data, struct vfsmount *mnt) | |
3012 | { | |
e9cdb1e3 | 3013 | return get_sb_pseudo(fs_type, "kvm:", NULL, KVMFS_SUPER_MAGIC, mnt); |
37e29d90 AK |
3014 | } |
3015 | ||
3016 | static struct file_system_type kvm_fs_type = { | |
3017 | .name = "kvmfs", | |
3018 | .get_sb = kvmfs_get_sb, | |
3019 | .kill_sb = kill_anon_super, | |
3020 | }; | |
3021 | ||
6aa8b732 AK |
3022 | int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module) |
3023 | { | |
3024 | int r; | |
3025 | ||
09db28b8 YI |
3026 | if (kvm_arch_ops) { |
3027 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
3028 | return -EEXIST; | |
3029 | } | |
3030 | ||
e097f35c | 3031 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
3032 | printk(KERN_ERR "kvm: no hardware support\n"); |
3033 | return -EOPNOTSUPP; | |
3034 | } | |
e097f35c | 3035 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3036 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3037 | return -EOPNOTSUPP; | |
3038 | } | |
3039 | ||
e097f35c YI |
3040 | kvm_arch_ops = ops; |
3041 | ||
6aa8b732 AK |
3042 | r = kvm_arch_ops->hardware_setup(); |
3043 | if (r < 0) | |
ca45aaae | 3044 | goto out; |
6aa8b732 | 3045 | |
8b6d44c7 | 3046 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3047 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3048 | if (r) | |
3049 | goto out_free_1; | |
6aa8b732 AK |
3050 | register_reboot_notifier(&kvm_reboot_notifier); |
3051 | ||
59ae6c6b AK |
3052 | r = sysdev_class_register(&kvm_sysdev_class); |
3053 | if (r) | |
3054 | goto out_free_2; | |
3055 | ||
3056 | r = sysdev_register(&kvm_sysdev); | |
3057 | if (r) | |
3058 | goto out_free_3; | |
3059 | ||
6aa8b732 AK |
3060 | kvm_chardev_ops.owner = module; |
3061 | ||
3062 | r = misc_register(&kvm_dev); | |
3063 | if (r) { | |
3064 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
3065 | goto out_free; | |
3066 | } | |
3067 | ||
3068 | return r; | |
3069 | ||
3070 | out_free: | |
59ae6c6b AK |
3071 | sysdev_unregister(&kvm_sysdev); |
3072 | out_free_3: | |
3073 | sysdev_class_unregister(&kvm_sysdev_class); | |
3074 | out_free_2: | |
6aa8b732 | 3075 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3076 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3077 | out_free_1: | |
8b6d44c7 | 3078 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 3079 | kvm_arch_ops->hardware_unsetup(); |
ca45aaae AK |
3080 | out: |
3081 | kvm_arch_ops = NULL; | |
6aa8b732 AK |
3082 | return r; |
3083 | } | |
3084 | ||
3085 | void kvm_exit_arch(void) | |
3086 | { | |
3087 | misc_deregister(&kvm_dev); | |
59ae6c6b AK |
3088 | sysdev_unregister(&kvm_sysdev); |
3089 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3090 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3091 | unregister_cpu_notifier(&kvm_cpu_notifier); |
8b6d44c7 | 3092 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 3093 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 3094 | kvm_arch_ops = NULL; |
6aa8b732 AK |
3095 | } |
3096 | ||
3097 | static __init int kvm_init(void) | |
3098 | { | |
3099 | static struct page *bad_page; | |
37e29d90 AK |
3100 | int r; |
3101 | ||
b5a33a75 AK |
3102 | r = kvm_mmu_module_init(); |
3103 | if (r) | |
3104 | goto out4; | |
3105 | ||
37e29d90 AK |
3106 | r = register_filesystem(&kvm_fs_type); |
3107 | if (r) | |
3108 | goto out3; | |
6aa8b732 | 3109 | |
37e29d90 AK |
3110 | kvmfs_mnt = kern_mount(&kvm_fs_type); |
3111 | r = PTR_ERR(kvmfs_mnt); | |
3112 | if (IS_ERR(kvmfs_mnt)) | |
3113 | goto out2; | |
6aa8b732 AK |
3114 | kvm_init_debug(); |
3115 | ||
bf591b24 MR |
3116 | kvm_init_msr_list(); |
3117 | ||
6aa8b732 AK |
3118 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
3119 | r = -ENOMEM; | |
3120 | goto out; | |
3121 | } | |
3122 | ||
3123 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3124 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3125 | ||
58e690e6 | 3126 | return 0; |
6aa8b732 AK |
3127 | |
3128 | out: | |
3129 | kvm_exit_debug(); | |
37e29d90 AK |
3130 | mntput(kvmfs_mnt); |
3131 | out2: | |
3132 | unregister_filesystem(&kvm_fs_type); | |
3133 | out3: | |
b5a33a75 AK |
3134 | kvm_mmu_module_exit(); |
3135 | out4: | |
6aa8b732 AK |
3136 | return r; |
3137 | } | |
3138 | ||
3139 | static __exit void kvm_exit(void) | |
3140 | { | |
3141 | kvm_exit_debug(); | |
3142 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
37e29d90 AK |
3143 | mntput(kvmfs_mnt); |
3144 | unregister_filesystem(&kvm_fs_type); | |
b5a33a75 | 3145 | kvm_mmu_module_exit(); |
6aa8b732 AK |
3146 | } |
3147 | ||
3148 | module_init(kvm_init) | |
3149 | module_exit(kvm_exit) | |
3150 | ||
3151 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
3152 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |