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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> |
d9e368d6 AK |
44 | #include <linux/cpumask.h> |
45 | #include <linux/smp.h> | |
6aa8b732 AK |
46 | |
47 | #include "x86_emulate.h" | |
48 | #include "segment_descriptor.h" | |
49 | ||
50 | MODULE_AUTHOR("Qumranet"); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
133de902 AK |
53 | static DEFINE_SPINLOCK(kvm_lock); |
54 | static LIST_HEAD(vm_list); | |
55 | ||
6aa8b732 | 56 | struct kvm_arch_ops *kvm_arch_ops; |
1165f5fe AK |
57 | |
58 | #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x) | |
6aa8b732 AK |
59 | |
60 | static struct kvm_stats_debugfs_item { | |
61 | const char *name; | |
1165f5fe | 62 | int offset; |
6aa8b732 AK |
63 | struct dentry *dentry; |
64 | } debugfs_entries[] = { | |
1165f5fe AK |
65 | { "pf_fixed", STAT_OFFSET(pf_fixed) }, |
66 | { "pf_guest", STAT_OFFSET(pf_guest) }, | |
67 | { "tlb_flush", STAT_OFFSET(tlb_flush) }, | |
68 | { "invlpg", STAT_OFFSET(invlpg) }, | |
69 | { "exits", STAT_OFFSET(exits) }, | |
70 | { "io_exits", STAT_OFFSET(io_exits) }, | |
71 | { "mmio_exits", STAT_OFFSET(mmio_exits) }, | |
72 | { "signal_exits", STAT_OFFSET(signal_exits) }, | |
73 | { "irq_window", STAT_OFFSET(irq_window_exits) }, | |
74 | { "halt_exits", STAT_OFFSET(halt_exits) }, | |
75 | { "request_irq", STAT_OFFSET(request_irq_exits) }, | |
76 | { "irq_exits", STAT_OFFSET(irq_exits) }, | |
e6adf283 | 77 | { "light_exits", STAT_OFFSET(light_exits) }, |
2cc51560 | 78 | { "efer_reload", STAT_OFFSET(efer_reload) }, |
1165f5fe | 79 | { NULL } |
6aa8b732 AK |
80 | }; |
81 | ||
82 | static struct dentry *debugfs_dir; | |
83 | ||
37e29d90 AK |
84 | struct vfsmount *kvmfs_mnt; |
85 | ||
6aa8b732 AK |
86 | #define MAX_IO_MSRS 256 |
87 | ||
88 | #define CR0_RESEVED_BITS 0xffffffff1ffaffc0ULL | |
89 | #define LMSW_GUEST_MASK 0x0eULL | |
90 | #define CR4_RESEVED_BITS (~((1ULL << 11) - 1)) | |
91 | #define CR8_RESEVED_BITS (~0x0fULL) | |
92 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe | |
93 | ||
05b3e0c2 | 94 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
95 | // LDT or TSS descriptor in the GDT. 16 bytes. |
96 | struct segment_descriptor_64 { | |
97 | struct segment_descriptor s; | |
98 | u32 base_higher; | |
99 | u32 pad_zero; | |
100 | }; | |
101 | ||
102 | #endif | |
103 | ||
bccf2150 AK |
104 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
105 | unsigned long arg); | |
106 | ||
f17abe9a AK |
107 | static struct inode *kvmfs_inode(struct file_operations *fops) |
108 | { | |
109 | int error = -ENOMEM; | |
110 | struct inode *inode = new_inode(kvmfs_mnt->mnt_sb); | |
111 | ||
112 | if (!inode) | |
113 | goto eexit_1; | |
114 | ||
115 | inode->i_fop = fops; | |
116 | ||
117 | /* | |
118 | * Mark the inode dirty from the very beginning, | |
119 | * that way it will never be moved to the dirty | |
120 | * list because mark_inode_dirty() will think | |
121 | * that it already _is_ on the dirty list. | |
122 | */ | |
123 | inode->i_state = I_DIRTY; | |
124 | inode->i_mode = S_IRUSR | S_IWUSR; | |
125 | inode->i_uid = current->fsuid; | |
126 | inode->i_gid = current->fsgid; | |
127 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; | |
128 | return inode; | |
129 | ||
130 | eexit_1: | |
131 | return ERR_PTR(error); | |
132 | } | |
133 | ||
134 | static struct file *kvmfs_file(struct inode *inode, void *private_data) | |
135 | { | |
136 | struct file *file = get_empty_filp(); | |
137 | ||
138 | if (!file) | |
139 | return ERR_PTR(-ENFILE); | |
140 | ||
141 | file->f_path.mnt = mntget(kvmfs_mnt); | |
142 | file->f_path.dentry = d_alloc_anon(inode); | |
143 | if (!file->f_path.dentry) | |
144 | return ERR_PTR(-ENOMEM); | |
145 | file->f_mapping = inode->i_mapping; | |
146 | ||
147 | file->f_pos = 0; | |
148 | file->f_flags = O_RDWR; | |
149 | file->f_op = inode->i_fop; | |
150 | file->f_mode = FMODE_READ | FMODE_WRITE; | |
151 | file->f_version = 0; | |
152 | file->private_data = private_data; | |
153 | return file; | |
154 | } | |
155 | ||
6aa8b732 AK |
156 | unsigned long segment_base(u16 selector) |
157 | { | |
158 | struct descriptor_table gdt; | |
159 | struct segment_descriptor *d; | |
160 | unsigned long table_base; | |
161 | typedef unsigned long ul; | |
162 | unsigned long v; | |
163 | ||
164 | if (selector == 0) | |
165 | return 0; | |
166 | ||
167 | asm ("sgdt %0" : "=m"(gdt)); | |
168 | table_base = gdt.base; | |
169 | ||
170 | if (selector & 4) { /* from ldt */ | |
171 | u16 ldt_selector; | |
172 | ||
173 | asm ("sldt %0" : "=g"(ldt_selector)); | |
174 | table_base = segment_base(ldt_selector); | |
175 | } | |
176 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
177 | v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24); | |
05b3e0c2 | 178 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
179 | if (d->system == 0 |
180 | && (d->type == 2 || d->type == 9 || d->type == 11)) | |
181 | v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
182 | #endif | |
183 | return v; | |
184 | } | |
185 | EXPORT_SYMBOL_GPL(segment_base); | |
186 | ||
5aacf0ca JM |
187 | static inline int valid_vcpu(int n) |
188 | { | |
189 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
190 | } | |
191 | ||
d27d4aca AK |
192 | int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
193 | void *dest) | |
6aa8b732 AK |
194 | { |
195 | unsigned char *host_buf = dest; | |
196 | unsigned long req_size = size; | |
197 | ||
198 | while (size) { | |
199 | hpa_t paddr; | |
200 | unsigned now; | |
201 | unsigned offset; | |
202 | hva_t guest_buf; | |
203 | ||
204 | paddr = gva_to_hpa(vcpu, addr); | |
205 | ||
206 | if (is_error_hpa(paddr)) | |
207 | break; | |
208 | ||
209 | guest_buf = (hva_t)kmap_atomic( | |
210 | pfn_to_page(paddr >> PAGE_SHIFT), | |
211 | KM_USER0); | |
212 | offset = addr & ~PAGE_MASK; | |
213 | guest_buf |= offset; | |
214 | now = min(size, PAGE_SIZE - offset); | |
215 | memcpy(host_buf, (void*)guest_buf, now); | |
216 | host_buf += now; | |
217 | addr += now; | |
218 | size -= now; | |
219 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
220 | } | |
221 | return req_size - size; | |
222 | } | |
223 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
224 | ||
d27d4aca AK |
225 | int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
226 | void *data) | |
6aa8b732 AK |
227 | { |
228 | unsigned char *host_buf = data; | |
229 | unsigned long req_size = size; | |
230 | ||
231 | while (size) { | |
232 | hpa_t paddr; | |
233 | unsigned now; | |
234 | unsigned offset; | |
235 | hva_t guest_buf; | |
ab51a434 | 236 | gfn_t gfn; |
6aa8b732 AK |
237 | |
238 | paddr = gva_to_hpa(vcpu, addr); | |
239 | ||
240 | if (is_error_hpa(paddr)) | |
241 | break; | |
242 | ||
ab51a434 UL |
243 | gfn = vcpu->mmu.gva_to_gpa(vcpu, addr) >> PAGE_SHIFT; |
244 | mark_page_dirty(vcpu->kvm, gfn); | |
6aa8b732 AK |
245 | guest_buf = (hva_t)kmap_atomic( |
246 | pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0); | |
247 | offset = addr & ~PAGE_MASK; | |
248 | guest_buf |= offset; | |
249 | now = min(size, PAGE_SIZE - offset); | |
250 | memcpy((void*)guest_buf, host_buf, now); | |
251 | host_buf += now; | |
252 | addr += now; | |
253 | size -= now; | |
254 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
255 | } | |
256 | return req_size - size; | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(kvm_write_guest); | |
259 | ||
7702fd1f AK |
260 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
261 | { | |
262 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
263 | return; | |
264 | ||
265 | vcpu->guest_fpu_loaded = 1; | |
266 | fx_save(vcpu->host_fx_image); | |
267 | fx_restore(vcpu->guest_fx_image); | |
268 | } | |
269 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
270 | ||
271 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
272 | { | |
273 | if (!vcpu->guest_fpu_loaded) | |
274 | return; | |
275 | ||
276 | vcpu->guest_fpu_loaded = 0; | |
277 | fx_save(vcpu->guest_fx_image); | |
278 | fx_restore(vcpu->host_fx_image); | |
279 | } | |
280 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
281 | ||
bccf2150 AK |
282 | /* |
283 | * Switches to specified vcpu, until a matching vcpu_put() | |
284 | */ | |
285 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 286 | { |
bccf2150 AK |
287 | mutex_lock(&vcpu->mutex); |
288 | kvm_arch_ops->vcpu_load(vcpu); | |
6aa8b732 AK |
289 | } |
290 | ||
291 | /* | |
bccf2150 AK |
292 | * Switches to specified vcpu, until a matching vcpu_put(). Will return NULL |
293 | * if the slot is not populated. | |
6aa8b732 | 294 | */ |
bccf2150 | 295 | static struct kvm_vcpu *vcpu_load_slot(struct kvm *kvm, int slot) |
6aa8b732 | 296 | { |
bccf2150 | 297 | struct kvm_vcpu *vcpu = &kvm->vcpus[slot]; |
6aa8b732 AK |
298 | |
299 | mutex_lock(&vcpu->mutex); | |
bccf2150 | 300 | if (!vcpu->vmcs) { |
6aa8b732 | 301 | mutex_unlock(&vcpu->mutex); |
8b6d44c7 | 302 | return NULL; |
6aa8b732 | 303 | } |
bccf2150 AK |
304 | kvm_arch_ops->vcpu_load(vcpu); |
305 | return vcpu; | |
6aa8b732 AK |
306 | } |
307 | ||
308 | static void vcpu_put(struct kvm_vcpu *vcpu) | |
309 | { | |
310 | kvm_arch_ops->vcpu_put(vcpu); | |
6aa8b732 AK |
311 | mutex_unlock(&vcpu->mutex); |
312 | } | |
313 | ||
d9e368d6 AK |
314 | static void ack_flush(void *_completed) |
315 | { | |
316 | atomic_t *completed = _completed; | |
317 | ||
318 | atomic_inc(completed); | |
319 | } | |
320 | ||
321 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
322 | { | |
323 | int i, cpu, needed; | |
324 | cpumask_t cpus; | |
325 | struct kvm_vcpu *vcpu; | |
326 | atomic_t completed; | |
327 | ||
328 | atomic_set(&completed, 0); | |
329 | cpus_clear(cpus); | |
330 | needed = 0; | |
331 | for (i = 0; i < kvm->nvcpus; ++i) { | |
332 | vcpu = &kvm->vcpus[i]; | |
333 | if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests)) | |
334 | continue; | |
335 | cpu = vcpu->cpu; | |
336 | if (cpu != -1 && cpu != raw_smp_processor_id()) | |
337 | if (!cpu_isset(cpu, cpus)) { | |
338 | cpu_set(cpu, cpus); | |
339 | ++needed; | |
340 | } | |
341 | } | |
342 | ||
343 | /* | |
344 | * We really want smp_call_function_mask() here. But that's not | |
345 | * available, so ipi all cpus in parallel and wait for them | |
346 | * to complete. | |
347 | */ | |
348 | for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus)) | |
349 | smp_call_function_single(cpu, ack_flush, &completed, 1, 0); | |
350 | while (atomic_read(&completed) != needed) { | |
351 | cpu_relax(); | |
352 | barrier(); | |
353 | } | |
354 | } | |
355 | ||
f17abe9a | 356 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
357 | { |
358 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
359 | int i; | |
360 | ||
361 | if (!kvm) | |
f17abe9a | 362 | return ERR_PTR(-ENOMEM); |
6aa8b732 AK |
363 | |
364 | spin_lock_init(&kvm->lock); | |
365 | INIT_LIST_HEAD(&kvm->active_mmu_pages); | |
120e9a45 AK |
366 | spin_lock(&kvm_lock); |
367 | list_add(&kvm->vm_list, &vm_list); | |
368 | spin_unlock(&kvm_lock); | |
2eeb2e94 | 369 | kvm_io_bus_init(&kvm->mmio_bus); |
6aa8b732 AK |
370 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
371 | struct kvm_vcpu *vcpu = &kvm->vcpus[i]; | |
372 | ||
373 | mutex_init(&vcpu->mutex); | |
133de902 | 374 | vcpu->cpu = -1; |
86a2b42e | 375 | vcpu->kvm = kvm; |
6aa8b732 | 376 | vcpu->mmu.root_hpa = INVALID_PAGE; |
6aa8b732 | 377 | } |
f17abe9a AK |
378 | return kvm; |
379 | } | |
380 | ||
381 | static int kvm_dev_open(struct inode *inode, struct file *filp) | |
382 | { | |
6aa8b732 AK |
383 | return 0; |
384 | } | |
385 | ||
386 | /* | |
387 | * Free any memory in @free but not in @dont. | |
388 | */ | |
389 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
390 | struct kvm_memory_slot *dont) | |
391 | { | |
392 | int i; | |
393 | ||
394 | if (!dont || free->phys_mem != dont->phys_mem) | |
395 | if (free->phys_mem) { | |
396 | for (i = 0; i < free->npages; ++i) | |
55a54f79 AK |
397 | if (free->phys_mem[i]) |
398 | __free_page(free->phys_mem[i]); | |
6aa8b732 AK |
399 | vfree(free->phys_mem); |
400 | } | |
401 | ||
402 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
403 | vfree(free->dirty_bitmap); | |
404 | ||
8b6d44c7 | 405 | free->phys_mem = NULL; |
6aa8b732 | 406 | free->npages = 0; |
8b6d44c7 | 407 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
408 | } |
409 | ||
410 | static void kvm_free_physmem(struct kvm *kvm) | |
411 | { | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 415 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
416 | } |
417 | ||
039576c0 AK |
418 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
419 | { | |
420 | int i; | |
421 | ||
422 | for (i = 0; i < 2; ++i) | |
423 | if (vcpu->pio.guest_pages[i]) { | |
424 | __free_page(vcpu->pio.guest_pages[i]); | |
425 | vcpu->pio.guest_pages[i] = NULL; | |
426 | } | |
427 | } | |
428 | ||
7b53aa56 AK |
429 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
430 | { | |
431 | if (!vcpu->vmcs) | |
432 | return; | |
433 | ||
434 | vcpu_load(vcpu); | |
435 | kvm_mmu_unload(vcpu); | |
436 | vcpu_put(vcpu); | |
437 | } | |
438 | ||
6aa8b732 AK |
439 | static void kvm_free_vcpu(struct kvm_vcpu *vcpu) |
440 | { | |
bccf2150 | 441 | if (!vcpu->vmcs) |
1e8ba6fb IM |
442 | return; |
443 | ||
bccf2150 | 444 | vcpu_load(vcpu); |
6aa8b732 | 445 | kvm_mmu_destroy(vcpu); |
08438475 | 446 | vcpu_put(vcpu); |
9ede74e0 | 447 | kvm_arch_ops->vcpu_free(vcpu); |
9a2bb7f4 AK |
448 | free_page((unsigned long)vcpu->run); |
449 | vcpu->run = NULL; | |
039576c0 AK |
450 | free_page((unsigned long)vcpu->pio_data); |
451 | vcpu->pio_data = NULL; | |
452 | free_pio_guest_pages(vcpu); | |
6aa8b732 AK |
453 | } |
454 | ||
455 | static void kvm_free_vcpus(struct kvm *kvm) | |
456 | { | |
457 | unsigned int i; | |
458 | ||
7b53aa56 AK |
459 | /* |
460 | * Unpin any mmu pages first. | |
461 | */ | |
462 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
463 | kvm_unload_vcpu_mmu(&kvm->vcpus[i]); | |
6aa8b732 AK |
464 | for (i = 0; i < KVM_MAX_VCPUS; ++i) |
465 | kvm_free_vcpu(&kvm->vcpus[i]); | |
466 | } | |
467 | ||
468 | static int kvm_dev_release(struct inode *inode, struct file *filp) | |
469 | { | |
f17abe9a AK |
470 | return 0; |
471 | } | |
6aa8b732 | 472 | |
f17abe9a AK |
473 | static void kvm_destroy_vm(struct kvm *kvm) |
474 | { | |
133de902 AK |
475 | spin_lock(&kvm_lock); |
476 | list_del(&kvm->vm_list); | |
477 | spin_unlock(&kvm_lock); | |
2eeb2e94 | 478 | kvm_io_bus_destroy(&kvm->mmio_bus); |
6aa8b732 AK |
479 | kvm_free_vcpus(kvm); |
480 | kvm_free_physmem(kvm); | |
481 | kfree(kvm); | |
f17abe9a AK |
482 | } |
483 | ||
484 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
485 | { | |
486 | struct kvm *kvm = filp->private_data; | |
487 | ||
488 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
489 | return 0; |
490 | } | |
491 | ||
492 | static void inject_gp(struct kvm_vcpu *vcpu) | |
493 | { | |
494 | kvm_arch_ops->inject_gp(vcpu, 0); | |
495 | } | |
496 | ||
1342d353 AK |
497 | /* |
498 | * Load the pae pdptrs. Return true is they are all valid. | |
499 | */ | |
500 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
501 | { |
502 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 503 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 AK |
504 | int i; |
505 | u64 pdpte; | |
506 | u64 *pdpt; | |
1342d353 | 507 | int ret; |
954bbbc2 | 508 | struct page *page; |
6aa8b732 AK |
509 | |
510 | spin_lock(&vcpu->kvm->lock); | |
954bbbc2 AK |
511 | page = gfn_to_page(vcpu->kvm, pdpt_gfn); |
512 | /* FIXME: !page - emulate? 0xff? */ | |
513 | pdpt = kmap_atomic(page, KM_USER0); | |
6aa8b732 | 514 | |
1342d353 | 515 | ret = 1; |
6aa8b732 AK |
516 | for (i = 0; i < 4; ++i) { |
517 | pdpte = pdpt[offset + i]; | |
1342d353 AK |
518 | if ((pdpte & 1) && (pdpte & 0xfffffff0000001e6ull)) { |
519 | ret = 0; | |
520 | goto out; | |
521 | } | |
6aa8b732 AK |
522 | } |
523 | ||
1342d353 AK |
524 | for (i = 0; i < 4; ++i) |
525 | vcpu->pdptrs[i] = pdpt[offset + i]; | |
526 | ||
527 | out: | |
6aa8b732 AK |
528 | kunmap_atomic(pdpt, KM_USER0); |
529 | spin_unlock(&vcpu->kvm->lock); | |
530 | ||
1342d353 | 531 | return ret; |
6aa8b732 AK |
532 | } |
533 | ||
534 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
535 | { | |
536 | if (cr0 & CR0_RESEVED_BITS) { | |
537 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
538 | cr0, vcpu->cr0); | |
539 | inject_gp(vcpu); | |
540 | return; | |
541 | } | |
542 | ||
543 | if ((cr0 & CR0_NW_MASK) && !(cr0 & CR0_CD_MASK)) { | |
544 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
545 | inject_gp(vcpu); | |
546 | return; | |
547 | } | |
548 | ||
549 | if ((cr0 & CR0_PG_MASK) && !(cr0 & CR0_PE_MASK)) { | |
550 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
551 | "and a clear PE flag\n"); | |
552 | inject_gp(vcpu); | |
553 | return; | |
554 | } | |
555 | ||
556 | if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) { | |
05b3e0c2 | 557 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
558 | if ((vcpu->shadow_efer & EFER_LME)) { |
559 | int cs_db, cs_l; | |
560 | ||
561 | if (!is_pae(vcpu)) { | |
562 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
563 | "in long mode while PAE is disabled\n"); | |
564 | inject_gp(vcpu); | |
565 | return; | |
566 | } | |
567 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
568 | if (cs_l) { | |
569 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
570 | "in long mode while CS.L == 1\n"); | |
571 | inject_gp(vcpu); | |
572 | return; | |
573 | ||
574 | } | |
575 | } else | |
576 | #endif | |
1342d353 | 577 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
578 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
579 | "reserved bits\n"); | |
580 | inject_gp(vcpu); | |
581 | return; | |
582 | } | |
583 | ||
584 | } | |
585 | ||
586 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
587 | vcpu->cr0 = cr0; | |
588 | ||
589 | spin_lock(&vcpu->kvm->lock); | |
590 | kvm_mmu_reset_context(vcpu); | |
591 | spin_unlock(&vcpu->kvm->lock); | |
592 | return; | |
593 | } | |
594 | EXPORT_SYMBOL_GPL(set_cr0); | |
595 | ||
596 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
597 | { | |
598 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); | |
599 | } | |
600 | EXPORT_SYMBOL_GPL(lmsw); | |
601 | ||
602 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
603 | { | |
604 | if (cr4 & CR4_RESEVED_BITS) { | |
605 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
606 | inject_gp(vcpu); | |
607 | return; | |
608 | } | |
609 | ||
a9058ecd | 610 | if (is_long_mode(vcpu)) { |
6aa8b732 AK |
611 | if (!(cr4 & CR4_PAE_MASK)) { |
612 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
613 | "in long mode\n"); | |
614 | inject_gp(vcpu); | |
615 | return; | |
616 | } | |
617 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & CR4_PAE_MASK) | |
1342d353 | 618 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
619 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
620 | inject_gp(vcpu); | |
621 | } | |
622 | ||
623 | if (cr4 & CR4_VMXE_MASK) { | |
624 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
625 | inject_gp(vcpu); | |
626 | return; | |
627 | } | |
628 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
629 | spin_lock(&vcpu->kvm->lock); | |
630 | kvm_mmu_reset_context(vcpu); | |
631 | spin_unlock(&vcpu->kvm->lock); | |
632 | } | |
633 | EXPORT_SYMBOL_GPL(set_cr4); | |
634 | ||
635 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
636 | { | |
a9058ecd | 637 | if (is_long_mode(vcpu)) { |
d27d4aca | 638 | if (cr3 & CR3_L_MODE_RESEVED_BITS) { |
6aa8b732 AK |
639 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
640 | inject_gp(vcpu); | |
641 | return; | |
642 | } | |
643 | } else { | |
644 | if (cr3 & CR3_RESEVED_BITS) { | |
645 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
646 | inject_gp(vcpu); | |
647 | return; | |
648 | } | |
649 | if (is_paging(vcpu) && is_pae(vcpu) && | |
1342d353 | 650 | !load_pdptrs(vcpu, cr3)) { |
6aa8b732 AK |
651 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
652 | "reserved bits\n"); | |
653 | inject_gp(vcpu); | |
654 | return; | |
655 | } | |
656 | } | |
657 | ||
658 | vcpu->cr3 = cr3; | |
659 | spin_lock(&vcpu->kvm->lock); | |
d21225ee IM |
660 | /* |
661 | * Does the new cr3 value map to physical memory? (Note, we | |
662 | * catch an invalid cr3 even in real-mode, because it would | |
663 | * cause trouble later on when we turn on paging anyway.) | |
664 | * | |
665 | * A real CPU would silently accept an invalid cr3 and would | |
666 | * attempt to use it - with largely undefined (and often hard | |
667 | * to debug) behavior on the guest side. | |
668 | */ | |
669 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
670 | inject_gp(vcpu); | |
671 | else | |
672 | vcpu->mmu.new_cr3(vcpu); | |
6aa8b732 AK |
673 | spin_unlock(&vcpu->kvm->lock); |
674 | } | |
675 | EXPORT_SYMBOL_GPL(set_cr3); | |
676 | ||
677 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
678 | { | |
679 | if ( cr8 & CR8_RESEVED_BITS) { | |
680 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
681 | inject_gp(vcpu); | |
682 | return; | |
683 | } | |
684 | vcpu->cr8 = cr8; | |
685 | } | |
686 | EXPORT_SYMBOL_GPL(set_cr8); | |
687 | ||
688 | void fx_init(struct kvm_vcpu *vcpu) | |
689 | { | |
690 | struct __attribute__ ((__packed__)) fx_image_s { | |
691 | u16 control; //fcw | |
692 | u16 status; //fsw | |
693 | u16 tag; // ftw | |
694 | u16 opcode; //fop | |
695 | u64 ip; // fpu ip | |
696 | u64 operand;// fpu dp | |
697 | u32 mxcsr; | |
698 | u32 mxcsr_mask; | |
699 | ||
700 | } *fx_image; | |
701 | ||
702 | fx_save(vcpu->host_fx_image); | |
703 | fpu_init(); | |
704 | fx_save(vcpu->guest_fx_image); | |
705 | fx_restore(vcpu->host_fx_image); | |
706 | ||
707 | fx_image = (struct fx_image_s *)vcpu->guest_fx_image; | |
708 | fx_image->mxcsr = 0x1f80; | |
709 | memset(vcpu->guest_fx_image + sizeof(struct fx_image_s), | |
710 | 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s)); | |
711 | } | |
712 | EXPORT_SYMBOL_GPL(fx_init); | |
713 | ||
02b27c1f UL |
714 | static void do_remove_write_access(struct kvm_vcpu *vcpu, int slot) |
715 | { | |
716 | spin_lock(&vcpu->kvm->lock); | |
717 | kvm_mmu_slot_remove_write_access(vcpu, slot); | |
718 | spin_unlock(&vcpu->kvm->lock); | |
719 | } | |
720 | ||
6aa8b732 AK |
721 | /* |
722 | * Allocate some memory and give it an address in the guest physical address | |
723 | * space. | |
724 | * | |
725 | * Discontiguous memory is allowed, mostly for framebuffers. | |
726 | */ | |
2c6f5df9 AK |
727 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
728 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
729 | { |
730 | int r; | |
731 | gfn_t base_gfn; | |
732 | unsigned long npages; | |
733 | unsigned long i; | |
734 | struct kvm_memory_slot *memslot; | |
735 | struct kvm_memory_slot old, new; | |
736 | int memory_config_version; | |
737 | ||
738 | r = -EINVAL; | |
739 | /* General sanity checks */ | |
740 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
741 | goto out; | |
742 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
743 | goto out; | |
744 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
745 | goto out; | |
746 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
747 | goto out; | |
748 | ||
749 | memslot = &kvm->memslots[mem->slot]; | |
750 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
751 | npages = mem->memory_size >> PAGE_SHIFT; | |
752 | ||
753 | if (!npages) | |
754 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
755 | ||
756 | raced: | |
757 | spin_lock(&kvm->lock); | |
758 | ||
759 | memory_config_version = kvm->memory_config_version; | |
760 | new = old = *memslot; | |
761 | ||
762 | new.base_gfn = base_gfn; | |
763 | new.npages = npages; | |
764 | new.flags = mem->flags; | |
765 | ||
766 | /* Disallow changing a memory slot's size. */ | |
767 | r = -EINVAL; | |
768 | if (npages && old.npages && npages != old.npages) | |
769 | goto out_unlock; | |
770 | ||
771 | /* Check for overlaps */ | |
772 | r = -EEXIST; | |
773 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
774 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
775 | ||
776 | if (s == memslot) | |
777 | continue; | |
778 | if (!((base_gfn + npages <= s->base_gfn) || | |
779 | (base_gfn >= s->base_gfn + s->npages))) | |
780 | goto out_unlock; | |
781 | } | |
782 | /* | |
783 | * Do memory allocations outside lock. memory_config_version will | |
784 | * detect any races. | |
785 | */ | |
786 | spin_unlock(&kvm->lock); | |
787 | ||
788 | /* Deallocate if slot is being removed */ | |
789 | if (!npages) | |
8b6d44c7 | 790 | new.phys_mem = NULL; |
6aa8b732 AK |
791 | |
792 | /* Free page dirty bitmap if unneeded */ | |
793 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 794 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
795 | |
796 | r = -ENOMEM; | |
797 | ||
798 | /* Allocate if a slot is being created */ | |
799 | if (npages && !new.phys_mem) { | |
800 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
801 | ||
802 | if (!new.phys_mem) | |
803 | goto out_free; | |
804 | ||
805 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
806 | for (i = 0; i < npages; ++i) { | |
807 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
808 | | __GFP_ZERO); | |
809 | if (!new.phys_mem[i]) | |
810 | goto out_free; | |
5972e953 | 811 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
812 | } |
813 | } | |
814 | ||
815 | /* Allocate page dirty bitmap if needed */ | |
816 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
817 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
818 | ||
819 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
820 | if (!new.dirty_bitmap) | |
821 | goto out_free; | |
822 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
823 | } | |
824 | ||
825 | spin_lock(&kvm->lock); | |
826 | ||
827 | if (memory_config_version != kvm->memory_config_version) { | |
828 | spin_unlock(&kvm->lock); | |
829 | kvm_free_physmem_slot(&new, &old); | |
830 | goto raced; | |
831 | } | |
832 | ||
833 | r = -EAGAIN; | |
834 | if (kvm->busy) | |
835 | goto out_unlock; | |
836 | ||
837 | if (mem->slot >= kvm->nmemslots) | |
838 | kvm->nmemslots = mem->slot + 1; | |
839 | ||
840 | *memslot = new; | |
841 | ++kvm->memory_config_version; | |
842 | ||
843 | spin_unlock(&kvm->lock); | |
844 | ||
845 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
846 | struct kvm_vcpu *vcpu; | |
847 | ||
bccf2150 | 848 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
849 | if (!vcpu) |
850 | continue; | |
ff990d59 UL |
851 | if (new.flags & KVM_MEM_LOG_DIRTY_PAGES) |
852 | do_remove_write_access(vcpu, mem->slot); | |
6aa8b732 AK |
853 | kvm_mmu_reset_context(vcpu); |
854 | vcpu_put(vcpu); | |
855 | } | |
856 | ||
857 | kvm_free_physmem_slot(&old, &new); | |
858 | return 0; | |
859 | ||
860 | out_unlock: | |
861 | spin_unlock(&kvm->lock); | |
862 | out_free: | |
863 | kvm_free_physmem_slot(&new, &old); | |
864 | out: | |
865 | return r; | |
866 | } | |
867 | ||
868 | /* | |
869 | * Get (and clear) the dirty memory log for a memory slot. | |
870 | */ | |
2c6f5df9 AK |
871 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
872 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
873 | { |
874 | struct kvm_memory_slot *memslot; | |
875 | int r, i; | |
876 | int n; | |
714b93da | 877 | int cleared; |
6aa8b732 AK |
878 | unsigned long any = 0; |
879 | ||
880 | spin_lock(&kvm->lock); | |
881 | ||
882 | /* | |
883 | * Prevent changes to guest memory configuration even while the lock | |
884 | * is not taken. | |
885 | */ | |
886 | ++kvm->busy; | |
887 | spin_unlock(&kvm->lock); | |
888 | r = -EINVAL; | |
889 | if (log->slot >= KVM_MEMORY_SLOTS) | |
890 | goto out; | |
891 | ||
892 | memslot = &kvm->memslots[log->slot]; | |
893 | r = -ENOENT; | |
894 | if (!memslot->dirty_bitmap) | |
895 | goto out; | |
896 | ||
cd1a4a98 | 897 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 898 | |
cd1a4a98 | 899 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
900 | any = memslot->dirty_bitmap[i]; |
901 | ||
902 | r = -EFAULT; | |
903 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
904 | goto out; | |
905 | ||
6aa8b732 | 906 | if (any) { |
714b93da | 907 | cleared = 0; |
6aa8b732 | 908 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
bccf2150 | 909 | struct kvm_vcpu *vcpu; |
6aa8b732 | 910 | |
bccf2150 | 911 | vcpu = vcpu_load_slot(kvm, i); |
6aa8b732 AK |
912 | if (!vcpu) |
913 | continue; | |
714b93da AK |
914 | if (!cleared) { |
915 | do_remove_write_access(vcpu, log->slot); | |
916 | memset(memslot->dirty_bitmap, 0, n); | |
917 | cleared = 1; | |
918 | } | |
6aa8b732 AK |
919 | kvm_arch_ops->tlb_flush(vcpu); |
920 | vcpu_put(vcpu); | |
921 | } | |
922 | } | |
923 | ||
924 | r = 0; | |
925 | ||
926 | out: | |
927 | spin_lock(&kvm->lock); | |
928 | --kvm->busy; | |
929 | spin_unlock(&kvm->lock); | |
930 | return r; | |
931 | } | |
932 | ||
e8207547 AK |
933 | /* |
934 | * Set a new alias region. Aliases map a portion of physical memory into | |
935 | * another portion. This is useful for memory windows, for example the PC | |
936 | * VGA region. | |
937 | */ | |
938 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
939 | struct kvm_memory_alias *alias) | |
940 | { | |
941 | int r, n; | |
942 | struct kvm_mem_alias *p; | |
943 | ||
944 | r = -EINVAL; | |
945 | /* General sanity checks */ | |
946 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
947 | goto out; | |
948 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
949 | goto out; | |
950 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
951 | goto out; | |
952 | if (alias->guest_phys_addr + alias->memory_size | |
953 | < alias->guest_phys_addr) | |
954 | goto out; | |
955 | if (alias->target_phys_addr + alias->memory_size | |
956 | < alias->target_phys_addr) | |
957 | goto out; | |
958 | ||
959 | spin_lock(&kvm->lock); | |
960 | ||
961 | p = &kvm->aliases[alias->slot]; | |
962 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
963 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
964 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
965 | ||
966 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
967 | if (kvm->aliases[n - 1].npages) | |
968 | break; | |
969 | kvm->naliases = n; | |
970 | ||
971 | spin_unlock(&kvm->lock); | |
972 | ||
973 | vcpu_load(&kvm->vcpus[0]); | |
974 | spin_lock(&kvm->lock); | |
975 | kvm_mmu_zap_all(&kvm->vcpus[0]); | |
976 | spin_unlock(&kvm->lock); | |
977 | vcpu_put(&kvm->vcpus[0]); | |
978 | ||
979 | return 0; | |
980 | ||
981 | out: | |
982 | return r; | |
983 | } | |
984 | ||
985 | static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
986 | { | |
987 | int i; | |
988 | struct kvm_mem_alias *alias; | |
989 | ||
990 | for (i = 0; i < kvm->naliases; ++i) { | |
991 | alias = &kvm->aliases[i]; | |
992 | if (gfn >= alias->base_gfn | |
993 | && gfn < alias->base_gfn + alias->npages) | |
994 | return alias->target_gfn + gfn - alias->base_gfn; | |
995 | } | |
996 | return gfn; | |
997 | } | |
998 | ||
999 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
1000 | { |
1001 | int i; | |
1002 | ||
1003 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1004 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1005 | ||
1006 | if (gfn >= memslot->base_gfn | |
1007 | && gfn < memslot->base_gfn + memslot->npages) | |
1008 | return memslot; | |
1009 | } | |
8b6d44c7 | 1010 | return NULL; |
6aa8b732 | 1011 | } |
e8207547 AK |
1012 | |
1013 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1014 | { | |
1015 | gfn = unalias_gfn(kvm, gfn); | |
1016 | return __gfn_to_memslot(kvm, gfn); | |
1017 | } | |
6aa8b732 | 1018 | |
954bbbc2 AK |
1019 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
1020 | { | |
1021 | struct kvm_memory_slot *slot; | |
1022 | ||
e8207547 AK |
1023 | gfn = unalias_gfn(kvm, gfn); |
1024 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
1025 | if (!slot) |
1026 | return NULL; | |
1027 | return slot->phys_mem[gfn - slot->base_gfn]; | |
1028 | } | |
1029 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
1030 | ||
6aa8b732 AK |
1031 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1032 | { | |
1033 | int i; | |
31389947 | 1034 | struct kvm_memory_slot *memslot; |
6aa8b732 AK |
1035 | unsigned long rel_gfn; |
1036 | ||
1037 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1038 | memslot = &kvm->memslots[i]; | |
1039 | ||
1040 | if (gfn >= memslot->base_gfn | |
1041 | && gfn < memslot->base_gfn + memslot->npages) { | |
1042 | ||
31389947 | 1043 | if (!memslot->dirty_bitmap) |
6aa8b732 AK |
1044 | return; |
1045 | ||
1046 | rel_gfn = gfn - memslot->base_gfn; | |
1047 | ||
1048 | /* avoid RMW */ | |
1049 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1050 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
1051 | return; | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | static int emulator_read_std(unsigned long addr, | |
4c690a1e | 1057 | void *val, |
6aa8b732 AK |
1058 | unsigned int bytes, |
1059 | struct x86_emulate_ctxt *ctxt) | |
1060 | { | |
1061 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1062 | void *data = val; | |
1063 | ||
1064 | while (bytes) { | |
1065 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1066 | unsigned offset = addr & (PAGE_SIZE-1); | |
1067 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1068 | unsigned long pfn; | |
954bbbc2 AK |
1069 | struct page *page; |
1070 | void *page_virt; | |
6aa8b732 AK |
1071 | |
1072 | if (gpa == UNMAPPED_GVA) | |
1073 | return X86EMUL_PROPAGATE_FAULT; | |
1074 | pfn = gpa >> PAGE_SHIFT; | |
954bbbc2 AK |
1075 | page = gfn_to_page(vcpu->kvm, pfn); |
1076 | if (!page) | |
6aa8b732 | 1077 | return X86EMUL_UNHANDLEABLE; |
954bbbc2 | 1078 | page_virt = kmap_atomic(page, KM_USER0); |
6aa8b732 | 1079 | |
954bbbc2 | 1080 | memcpy(data, page_virt + offset, tocopy); |
6aa8b732 | 1081 | |
954bbbc2 | 1082 | kunmap_atomic(page_virt, KM_USER0); |
6aa8b732 AK |
1083 | |
1084 | bytes -= tocopy; | |
1085 | data += tocopy; | |
1086 | addr += tocopy; | |
1087 | } | |
1088 | ||
1089 | return X86EMUL_CONTINUE; | |
1090 | } | |
1091 | ||
1092 | static int emulator_write_std(unsigned long addr, | |
4c690a1e | 1093 | const void *val, |
6aa8b732 AK |
1094 | unsigned int bytes, |
1095 | struct x86_emulate_ctxt *ctxt) | |
1096 | { | |
1097 | printk(KERN_ERR "emulator_write_std: addr %lx n %d\n", | |
1098 | addr, bytes); | |
1099 | return X86EMUL_UNHANDLEABLE; | |
1100 | } | |
1101 | ||
2eeb2e94 GH |
1102 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
1103 | gpa_t addr) | |
1104 | { | |
1105 | /* | |
1106 | * Note that its important to have this wrapper function because | |
1107 | * in the very near future we will be checking for MMIOs against | |
1108 | * the LAPIC as well as the general MMIO bus | |
1109 | */ | |
1110 | return kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
1111 | } | |
1112 | ||
6aa8b732 | 1113 | static int emulator_read_emulated(unsigned long addr, |
4c690a1e | 1114 | void *val, |
6aa8b732 AK |
1115 | unsigned int bytes, |
1116 | struct x86_emulate_ctxt *ctxt) | |
1117 | { | |
2eeb2e94 GH |
1118 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
1119 | struct kvm_io_device *mmio_dev; | |
1120 | gpa_t gpa; | |
6aa8b732 AK |
1121 | |
1122 | if (vcpu->mmio_read_completed) { | |
1123 | memcpy(val, vcpu->mmio_data, bytes); | |
1124 | vcpu->mmio_read_completed = 0; | |
1125 | return X86EMUL_CONTINUE; | |
1126 | } else if (emulator_read_std(addr, val, bytes, ctxt) | |
1127 | == X86EMUL_CONTINUE) | |
1128 | return X86EMUL_CONTINUE; | |
d27d4aca | 1129 | |
2eeb2e94 GH |
1130 | gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); |
1131 | if (gpa == UNMAPPED_GVA) | |
1132 | return X86EMUL_PROPAGATE_FAULT; | |
6aa8b732 | 1133 | |
2eeb2e94 GH |
1134 | /* |
1135 | * Is this MMIO handled locally? | |
1136 | */ | |
1137 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1138 | if (mmio_dev) { | |
1139 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
1140 | return X86EMUL_CONTINUE; | |
6aa8b732 | 1141 | } |
2eeb2e94 GH |
1142 | |
1143 | vcpu->mmio_needed = 1; | |
1144 | vcpu->mmio_phys_addr = gpa; | |
1145 | vcpu->mmio_size = bytes; | |
1146 | vcpu->mmio_is_write = 0; | |
1147 | ||
1148 | return X86EMUL_UNHANDLEABLE; | |
6aa8b732 AK |
1149 | } |
1150 | ||
da4a00f0 | 1151 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
4c690a1e | 1152 | const void *val, int bytes) |
da4a00f0 | 1153 | { |
da4a00f0 AK |
1154 | struct page *page; |
1155 | void *virt; | |
09072daf | 1156 | unsigned offset = offset_in_page(gpa); |
da4a00f0 AK |
1157 | |
1158 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
1159 | return 0; | |
954bbbc2 AK |
1160 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
1161 | if (!page) | |
da4a00f0 | 1162 | return 0; |
ab51a434 | 1163 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 | 1164 | virt = kmap_atomic(page, KM_USER0); |
09072daf | 1165 | kvm_mmu_pte_write(vcpu, gpa, virt + offset, val, bytes); |
4c690a1e | 1166 | memcpy(virt + offset_in_page(gpa), val, bytes); |
da4a00f0 | 1167 | kunmap_atomic(virt, KM_USER0); |
da4a00f0 AK |
1168 | return 1; |
1169 | } | |
1170 | ||
6aa8b732 | 1171 | static int emulator_write_emulated(unsigned long addr, |
4c690a1e | 1172 | const void *val, |
6aa8b732 AK |
1173 | unsigned int bytes, |
1174 | struct x86_emulate_ctxt *ctxt) | |
1175 | { | |
2eeb2e94 GH |
1176 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
1177 | struct kvm_io_device *mmio_dev; | |
1178 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
6aa8b732 | 1179 | |
c9047f53 AK |
1180 | if (gpa == UNMAPPED_GVA) { |
1181 | kvm_arch_ops->inject_page_fault(vcpu, addr, 2); | |
6aa8b732 | 1182 | return X86EMUL_PROPAGATE_FAULT; |
c9047f53 | 1183 | } |
6aa8b732 | 1184 | |
da4a00f0 AK |
1185 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1186 | return X86EMUL_CONTINUE; | |
1187 | ||
2eeb2e94 GH |
1188 | /* |
1189 | * Is this MMIO handled locally? | |
1190 | */ | |
1191 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1192 | if (mmio_dev) { | |
1193 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
1194 | return X86EMUL_CONTINUE; | |
1195 | } | |
1196 | ||
6aa8b732 AK |
1197 | vcpu->mmio_needed = 1; |
1198 | vcpu->mmio_phys_addr = gpa; | |
1199 | vcpu->mmio_size = bytes; | |
1200 | vcpu->mmio_is_write = 1; | |
4c690a1e | 1201 | memcpy(vcpu->mmio_data, val, bytes); |
6aa8b732 AK |
1202 | |
1203 | return X86EMUL_CONTINUE; | |
1204 | } | |
1205 | ||
1206 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
4c690a1e AK |
1207 | const void *old, |
1208 | const void *new, | |
6aa8b732 AK |
1209 | unsigned int bytes, |
1210 | struct x86_emulate_ctxt *ctxt) | |
1211 | { | |
1212 | static int reported; | |
1213 | ||
1214 | if (!reported) { | |
1215 | reported = 1; | |
1216 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1217 | } | |
1218 | return emulator_write_emulated(addr, new, bytes, ctxt); | |
1219 | } | |
1220 | ||
1221 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1222 | { | |
1223 | return kvm_arch_ops->get_segment_base(vcpu, seg); | |
1224 | } | |
1225 | ||
1226 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1227 | { | |
6aa8b732 AK |
1228 | return X86EMUL_CONTINUE; |
1229 | } | |
1230 | ||
1231 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1232 | { | |
399badf3 | 1233 | unsigned long cr0; |
6aa8b732 | 1234 | |
399badf3 | 1235 | cr0 = vcpu->cr0 & ~CR0_TS_MASK; |
6aa8b732 AK |
1236 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1237 | return X86EMUL_CONTINUE; | |
1238 | } | |
1239 | ||
1240 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1241 | { | |
1242 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1243 | ||
1244 | switch (dr) { | |
1245 | case 0 ... 3: | |
1246 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1247 | return X86EMUL_CONTINUE; | |
1248 | default: | |
1249 | printk(KERN_DEBUG "%s: unexpected dr %u\n", | |
1250 | __FUNCTION__, dr); | |
1251 | return X86EMUL_UNHANDLEABLE; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1256 | { | |
1257 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1258 | int exception; | |
1259 | ||
1260 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1261 | if (exception) { | |
1262 | /* FIXME: better handling */ | |
1263 | return X86EMUL_UNHANDLEABLE; | |
1264 | } | |
1265 | return X86EMUL_CONTINUE; | |
1266 | } | |
1267 | ||
1268 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1269 | { | |
1270 | static int reported; | |
1271 | u8 opcodes[4]; | |
1272 | unsigned long rip = ctxt->vcpu->rip; | |
1273 | unsigned long rip_linear; | |
1274 | ||
1275 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1276 | ||
1277 | if (reported) | |
1278 | return; | |
1279 | ||
1280 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt); | |
1281 | ||
1282 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1283 | " rip %lx %02x %02x %02x %02x\n", | |
1284 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1285 | reported = 1; | |
1286 | } | |
1287 | ||
1288 | struct x86_emulate_ops emulate_ops = { | |
1289 | .read_std = emulator_read_std, | |
1290 | .write_std = emulator_write_std, | |
1291 | .read_emulated = emulator_read_emulated, | |
1292 | .write_emulated = emulator_write_emulated, | |
1293 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1294 | }; | |
1295 | ||
1296 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1297 | struct kvm_run *run, | |
1298 | unsigned long cr2, | |
1299 | u16 error_code) | |
1300 | { | |
1301 | struct x86_emulate_ctxt emulate_ctxt; | |
1302 | int r; | |
1303 | int cs_db, cs_l; | |
1304 | ||
e7df56e4 | 1305 | vcpu->mmio_fault_cr2 = cr2; |
6aa8b732 AK |
1306 | kvm_arch_ops->cache_regs(vcpu); |
1307 | ||
1308 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1309 | ||
1310 | emulate_ctxt.vcpu = vcpu; | |
1311 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1312 | emulate_ctxt.cr2 = cr2; | |
1313 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1314 | ? X86EMUL_MODE_REAL : cs_l | |
1315 | ? X86EMUL_MODE_PROT64 : cs_db | |
1316 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1317 | ||
1318 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1319 | emulate_ctxt.cs_base = 0; | |
1320 | emulate_ctxt.ds_base = 0; | |
1321 | emulate_ctxt.es_base = 0; | |
1322 | emulate_ctxt.ss_base = 0; | |
1323 | } else { | |
1324 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1325 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1326 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1327 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1328 | } | |
1329 | ||
1330 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1331 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1332 | ||
1333 | vcpu->mmio_is_write = 0; | |
1334 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); | |
1335 | ||
1336 | if ((r || vcpu->mmio_is_write) && run) { | |
1337 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
1338 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1339 | run->mmio.len = vcpu->mmio_size; | |
1340 | run->mmio.is_write = vcpu->mmio_is_write; | |
1341 | } | |
1342 | ||
1343 | if (r) { | |
a436036b AK |
1344 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1345 | return EMULATE_DONE; | |
6aa8b732 AK |
1346 | if (!vcpu->mmio_needed) { |
1347 | report_emulation_failure(&emulate_ctxt); | |
1348 | return EMULATE_FAIL; | |
1349 | } | |
1350 | return EMULATE_DO_MMIO; | |
1351 | } | |
1352 | ||
1353 | kvm_arch_ops->decache_regs(vcpu); | |
1354 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1355 | ||
02c83209 AK |
1356 | if (vcpu->mmio_is_write) { |
1357 | vcpu->mmio_needed = 0; | |
6aa8b732 | 1358 | return EMULATE_DO_MMIO; |
02c83209 | 1359 | } |
6aa8b732 AK |
1360 | |
1361 | return EMULATE_DONE; | |
1362 | } | |
1363 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1364 | ||
d3bef15f AK |
1365 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
1366 | { | |
1367 | if (vcpu->irq_summary) | |
1368 | return 1; | |
1369 | ||
1370 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
1371 | ++vcpu->stat.halt_exits; | |
1372 | return 0; | |
1373 | } | |
1374 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
1375 | ||
270fd9b9 AK |
1376 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1377 | { | |
1378 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1379 | ||
9b22bf57 | 1380 | kvm_arch_ops->cache_regs(vcpu); |
270fd9b9 AK |
1381 | ret = -KVM_EINVAL; |
1382 | #ifdef CONFIG_X86_64 | |
1383 | if (is_long_mode(vcpu)) { | |
1384 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1385 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1386 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1387 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1388 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1389 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1390 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1391 | } else | |
1392 | #endif | |
1393 | { | |
1394 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1395 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1396 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1397 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1398 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1399 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1400 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1401 | } | |
1402 | switch (nr) { | |
1403 | default: | |
b4e63f56 AK |
1404 | run->hypercall.args[0] = a0; |
1405 | run->hypercall.args[1] = a1; | |
1406 | run->hypercall.args[2] = a2; | |
1407 | run->hypercall.args[3] = a3; | |
1408 | run->hypercall.args[4] = a4; | |
1409 | run->hypercall.args[5] = a5; | |
1410 | run->hypercall.ret = ret; | |
1411 | run->hypercall.longmode = is_long_mode(vcpu); | |
1412 | kvm_arch_ops->decache_regs(vcpu); | |
1413 | return 0; | |
270fd9b9 AK |
1414 | } |
1415 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
9b22bf57 | 1416 | kvm_arch_ops->decache_regs(vcpu); |
270fd9b9 AK |
1417 | return 1; |
1418 | } | |
1419 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1420 | ||
6aa8b732 AK |
1421 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1422 | { | |
1423 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1424 | } | |
1425 | ||
1426 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1427 | { | |
1428 | struct descriptor_table dt = { limit, base }; | |
1429 | ||
1430 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1431 | } | |
1432 | ||
1433 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1434 | { | |
1435 | struct descriptor_table dt = { limit, base }; | |
1436 | ||
1437 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1438 | } | |
1439 | ||
1440 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1441 | unsigned long *rflags) | |
1442 | { | |
1443 | lmsw(vcpu, msw); | |
1444 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1445 | } | |
1446 | ||
1447 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1448 | { | |
25c4c276 | 1449 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1450 | switch (cr) { |
1451 | case 0: | |
1452 | return vcpu->cr0; | |
1453 | case 2: | |
1454 | return vcpu->cr2; | |
1455 | case 3: | |
1456 | return vcpu->cr3; | |
1457 | case 4: | |
1458 | return vcpu->cr4; | |
1459 | default: | |
1460 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1461 | return 0; | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1466 | unsigned long *rflags) | |
1467 | { | |
1468 | switch (cr) { | |
1469 | case 0: | |
1470 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1471 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1472 | break; | |
1473 | case 2: | |
1474 | vcpu->cr2 = val; | |
1475 | break; | |
1476 | case 3: | |
1477 | set_cr3(vcpu, val); | |
1478 | break; | |
1479 | case 4: | |
1480 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1481 | break; | |
1482 | default: | |
1483 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1484 | } | |
1485 | } | |
1486 | ||
102d8325 IM |
1487 | /* |
1488 | * Register the para guest with the host: | |
1489 | */ | |
1490 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1491 | { | |
1492 | struct kvm_vcpu_para_state *para_state; | |
1493 | hpa_t para_state_hpa, hypercall_hpa; | |
1494 | struct page *para_state_page; | |
1495 | unsigned char *hypercall; | |
1496 | gpa_t hypercall_gpa; | |
1497 | ||
1498 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1499 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1500 | ||
1501 | /* | |
1502 | * Needs to be page aligned: | |
1503 | */ | |
1504 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1505 | goto err_gp; | |
1506 | ||
1507 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1508 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1509 | if (is_error_hpa(para_state_hpa)) | |
1510 | goto err_gp; | |
1511 | ||
ab51a434 | 1512 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 IM |
1513 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
1514 | para_state = kmap_atomic(para_state_page, KM_USER0); | |
1515 | ||
1516 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1517 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1518 | ||
1519 | para_state->host_version = KVM_PARA_API_VERSION; | |
1520 | /* | |
1521 | * We cannot support guests that try to register themselves | |
1522 | * with a newer API version than the host supports: | |
1523 | */ | |
1524 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1525 | para_state->ret = -KVM_EINVAL; | |
1526 | goto err_kunmap_skip; | |
1527 | } | |
1528 | ||
1529 | hypercall_gpa = para_state->hypercall_gpa; | |
1530 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1531 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1532 | if (is_error_hpa(hypercall_hpa)) { | |
1533 | para_state->ret = -KVM_EINVAL; | |
1534 | goto err_kunmap_skip; | |
1535 | } | |
1536 | ||
1537 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1538 | vcpu->para_state_page = para_state_page; | |
1539 | vcpu->para_state_gpa = para_state_gpa; | |
1540 | vcpu->hypercall_gpa = hypercall_gpa; | |
1541 | ||
ab51a434 | 1542 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1543 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1544 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1545 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1546 | kunmap_atomic(hypercall, KM_USER1); | |
1547 | ||
1548 | para_state->ret = 0; | |
1549 | err_kunmap_skip: | |
1550 | kunmap_atomic(para_state, KM_USER0); | |
1551 | return 0; | |
1552 | err_gp: | |
1553 | return 1; | |
1554 | } | |
1555 | ||
3bab1f5d AK |
1556 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1557 | { | |
1558 | u64 data; | |
1559 | ||
1560 | switch (msr) { | |
1561 | case 0xc0010010: /* SYSCFG */ | |
1562 | case 0xc0010015: /* HWCR */ | |
1563 | case MSR_IA32_PLATFORM_ID: | |
1564 | case MSR_IA32_P5_MC_ADDR: | |
1565 | case MSR_IA32_P5_MC_TYPE: | |
1566 | case MSR_IA32_MC0_CTL: | |
1567 | case MSR_IA32_MCG_STATUS: | |
1568 | case MSR_IA32_MCG_CAP: | |
1569 | case MSR_IA32_MC0_MISC: | |
1570 | case MSR_IA32_MC0_MISC+4: | |
1571 | case MSR_IA32_MC0_MISC+8: | |
1572 | case MSR_IA32_MC0_MISC+12: | |
1573 | case MSR_IA32_MC0_MISC+16: | |
1574 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1575 | case MSR_IA32_PERF_STATUS: |
2dc7094b | 1576 | case MSR_IA32_EBL_CR_POWERON: |
3bab1f5d AK |
1577 | /* MTRR registers */ |
1578 | case 0xfe: | |
1579 | case 0x200 ... 0x2ff: | |
1580 | data = 0; | |
1581 | break; | |
a8d13ea2 AK |
1582 | case 0xcd: /* fsb frequency */ |
1583 | data = 3; | |
1584 | break; | |
3bab1f5d AK |
1585 | case MSR_IA32_APICBASE: |
1586 | data = vcpu->apic_base; | |
1587 | break; | |
6f00e68f AK |
1588 | case MSR_IA32_MISC_ENABLE: |
1589 | data = vcpu->ia32_misc_enable_msr; | |
1590 | break; | |
3bab1f5d AK |
1591 | #ifdef CONFIG_X86_64 |
1592 | case MSR_EFER: | |
1593 | data = vcpu->shadow_efer; | |
1594 | break; | |
1595 | #endif | |
1596 | default: | |
1597 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr); | |
1598 | return 1; | |
1599 | } | |
1600 | *pdata = data; | |
1601 | return 0; | |
1602 | } | |
1603 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1604 | ||
6aa8b732 AK |
1605 | /* |
1606 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1607 | * Returns 0 on success, non-0 otherwise. | |
1608 | * Assumes vcpu_load() was already called. | |
1609 | */ | |
1610 | static int get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
1611 | { | |
1612 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1613 | } | |
1614 | ||
05b3e0c2 | 1615 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1616 | |
3bab1f5d | 1617 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1618 | { |
6aa8b732 AK |
1619 | if (efer & EFER_RESERVED_BITS) { |
1620 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1621 | efer); | |
1622 | inject_gp(vcpu); | |
1623 | return; | |
1624 | } | |
1625 | ||
1626 | if (is_paging(vcpu) | |
1627 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1628 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1629 | inject_gp(vcpu); | |
1630 | return; | |
1631 | } | |
1632 | ||
7725f0ba AK |
1633 | kvm_arch_ops->set_efer(vcpu, efer); |
1634 | ||
6aa8b732 AK |
1635 | efer &= ~EFER_LMA; |
1636 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1637 | ||
1638 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1639 | } |
6aa8b732 AK |
1640 | |
1641 | #endif | |
1642 | ||
3bab1f5d AK |
1643 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1644 | { | |
1645 | switch (msr) { | |
1646 | #ifdef CONFIG_X86_64 | |
1647 | case MSR_EFER: | |
1648 | set_efer(vcpu, data); | |
1649 | break; | |
1650 | #endif | |
1651 | case MSR_IA32_MC0_STATUS: | |
1652 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
1653 | __FUNCTION__, data); | |
1654 | break; | |
0e5bf0d0 SK |
1655 | case MSR_IA32_MCG_STATUS: |
1656 | printk(KERN_WARNING "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
1657 | __FUNCTION__, data); | |
1658 | break; | |
3bab1f5d AK |
1659 | case MSR_IA32_UCODE_REV: |
1660 | case MSR_IA32_UCODE_WRITE: | |
1661 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1662 | break; | |
1663 | case MSR_IA32_APICBASE: | |
1664 | vcpu->apic_base = data; | |
1665 | break; | |
6f00e68f AK |
1666 | case MSR_IA32_MISC_ENABLE: |
1667 | vcpu->ia32_misc_enable_msr = data; | |
1668 | break; | |
102d8325 IM |
1669 | /* |
1670 | * This is the 'probe whether the host is KVM' logic: | |
1671 | */ | |
1672 | case MSR_KVM_API_MAGIC: | |
1673 | return vcpu_register_para(vcpu, data); | |
1674 | ||
3bab1f5d AK |
1675 | default: |
1676 | printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr); | |
1677 | return 1; | |
1678 | } | |
1679 | return 0; | |
1680 | } | |
1681 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1682 | ||
6aa8b732 AK |
1683 | /* |
1684 | * Writes msr value into into the appropriate "register". | |
1685 | * Returns 0 on success, non-0 otherwise. | |
1686 | * Assumes vcpu_load() was already called. | |
1687 | */ | |
1688 | static int set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
1689 | { | |
1690 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1691 | } | |
1692 | ||
1693 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1694 | { | |
3fca0365 YD |
1695 | if (!need_resched()) |
1696 | return; | |
6aa8b732 AK |
1697 | vcpu_put(vcpu); |
1698 | cond_resched(); | |
bccf2150 | 1699 | vcpu_load(vcpu); |
6aa8b732 AK |
1700 | } |
1701 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1702 | ||
1703 | void load_msrs(struct vmx_msr_entry *e, int n) | |
1704 | { | |
1705 | int i; | |
1706 | ||
1707 | for (i = 0; i < n; ++i) | |
1708 | wrmsrl(e[i].index, e[i].data); | |
1709 | } | |
1710 | EXPORT_SYMBOL_GPL(load_msrs); | |
1711 | ||
1712 | void save_msrs(struct vmx_msr_entry *e, int n) | |
1713 | { | |
1714 | int i; | |
1715 | ||
1716 | for (i = 0; i < n; ++i) | |
1717 | rdmsrl(e[i].index, e[i].data); | |
1718 | } | |
1719 | EXPORT_SYMBOL_GPL(save_msrs); | |
1720 | ||
06465c5a AK |
1721 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1722 | { | |
1723 | int i; | |
1724 | u32 function; | |
1725 | struct kvm_cpuid_entry *e, *best; | |
1726 | ||
1727 | kvm_arch_ops->cache_regs(vcpu); | |
1728 | function = vcpu->regs[VCPU_REGS_RAX]; | |
1729 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1730 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1731 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1732 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1733 | best = NULL; | |
1734 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1735 | e = &vcpu->cpuid_entries[i]; | |
1736 | if (e->function == function) { | |
1737 | best = e; | |
1738 | break; | |
1739 | } | |
1740 | /* | |
1741 | * Both basic or both extended? | |
1742 | */ | |
1743 | if (((e->function ^ function) & 0x80000000) == 0) | |
1744 | if (!best || e->function > best->function) | |
1745 | best = e; | |
1746 | } | |
1747 | if (best) { | |
1748 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1749 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1750 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1751 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1752 | } | |
1753 | kvm_arch_ops->decache_regs(vcpu); | |
1754 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1755 | } | |
1756 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1757 | ||
039576c0 | 1758 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1759 | { |
039576c0 AK |
1760 | void *p = vcpu->pio_data; |
1761 | void *q; | |
1762 | unsigned bytes; | |
1763 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1764 | ||
1765 | kvm_arch_ops->vcpu_put(vcpu); | |
1766 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, | |
1767 | PAGE_KERNEL); | |
1768 | if (!q) { | |
1769 | kvm_arch_ops->vcpu_load(vcpu); | |
1770 | free_pio_guest_pages(vcpu); | |
1771 | return -ENOMEM; | |
1772 | } | |
1773 | q += vcpu->pio.guest_page_offset; | |
1774 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1775 | if (vcpu->pio.in) | |
1776 | memcpy(q, p, bytes); | |
1777 | else | |
1778 | memcpy(p, q, bytes); | |
1779 | q -= vcpu->pio.guest_page_offset; | |
1780 | vunmap(q); | |
1781 | kvm_arch_ops->vcpu_load(vcpu); | |
1782 | free_pio_guest_pages(vcpu); | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1787 | { | |
1788 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1789 | long delta; |
039576c0 | 1790 | int r; |
46fc1477 AK |
1791 | |
1792 | kvm_arch_ops->cache_regs(vcpu); | |
1793 | ||
1794 | if (!io->string) { | |
039576c0 AK |
1795 | if (io->in) |
1796 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1797 | io->size); |
1798 | } else { | |
039576c0 AK |
1799 | if (io->in) { |
1800 | r = pio_copy_data(vcpu); | |
1801 | if (r) { | |
1802 | kvm_arch_ops->cache_regs(vcpu); | |
1803 | return r; | |
1804 | } | |
1805 | } | |
1806 | ||
46fc1477 AK |
1807 | delta = 1; |
1808 | if (io->rep) { | |
039576c0 | 1809 | delta *= io->cur_count; |
46fc1477 AK |
1810 | /* |
1811 | * The size of the register should really depend on | |
1812 | * current address size. | |
1813 | */ | |
1814 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1815 | } | |
039576c0 | 1816 | if (io->down) |
46fc1477 AK |
1817 | delta = -delta; |
1818 | delta *= io->size; | |
039576c0 | 1819 | if (io->in) |
46fc1477 AK |
1820 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1821 | else | |
1822 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1823 | } | |
1824 | ||
46fc1477 AK |
1825 | kvm_arch_ops->decache_regs(vcpu); |
1826 | ||
039576c0 AK |
1827 | io->count -= io->cur_count; |
1828 | io->cur_count = 0; | |
1829 | ||
1830 | if (!io->count) | |
1831 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1832 | return 0; | |
46fc1477 AK |
1833 | } |
1834 | ||
039576c0 AK |
1835 | int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
1836 | int size, unsigned long count, int string, int down, | |
1837 | gva_t address, int rep, unsigned port) | |
1838 | { | |
1839 | unsigned now, in_page; | |
1840 | int i; | |
1841 | int nr_pages = 1; | |
1842 | struct page *page; | |
1843 | ||
1844 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1845 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1846 | vcpu->run->io.size = size; | |
1847 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1848 | vcpu->run->io.count = count; | |
1849 | vcpu->run->io.port = port; | |
1850 | vcpu->pio.count = count; | |
1851 | vcpu->pio.cur_count = count; | |
1852 | vcpu->pio.size = size; | |
1853 | vcpu->pio.in = in; | |
1854 | vcpu->pio.string = string; | |
1855 | vcpu->pio.down = down; | |
1856 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
1857 | vcpu->pio.rep = rep; | |
1858 | ||
1859 | if (!string) { | |
1860 | kvm_arch_ops->cache_regs(vcpu); | |
1861 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); | |
1862 | kvm_arch_ops->decache_regs(vcpu); | |
1863 | return 0; | |
1864 | } | |
1865 | ||
1866 | if (!count) { | |
1867 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1868 | return 1; | |
1869 | } | |
1870 | ||
1871 | now = min(count, PAGE_SIZE / size); | |
1872 | ||
1873 | if (!down) | |
1874 | in_page = PAGE_SIZE - offset_in_page(address); | |
1875 | else | |
1876 | in_page = offset_in_page(address) + size; | |
1877 | now = min(count, (unsigned long)in_page / size); | |
1878 | if (!now) { | |
1879 | /* | |
1880 | * String I/O straddles page boundary. Pin two guest pages | |
1881 | * so that we satisfy atomicity constraints. Do just one | |
1882 | * transaction to avoid complexity. | |
1883 | */ | |
1884 | nr_pages = 2; | |
1885 | now = 1; | |
1886 | } | |
1887 | if (down) { | |
1888 | /* | |
1889 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
1890 | */ | |
1891 | printk(KERN_ERR "kvm: guest string pio down\n"); | |
1892 | inject_gp(vcpu); | |
1893 | return 1; | |
1894 | } | |
1895 | vcpu->run->io.count = now; | |
1896 | vcpu->pio.cur_count = now; | |
1897 | ||
1898 | for (i = 0; i < nr_pages; ++i) { | |
1899 | spin_lock(&vcpu->kvm->lock); | |
1900 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); | |
1901 | if (page) | |
1902 | get_page(page); | |
1903 | vcpu->pio.guest_pages[i] = page; | |
1904 | spin_unlock(&vcpu->kvm->lock); | |
1905 | if (!page) { | |
1906 | inject_gp(vcpu); | |
1907 | free_pio_guest_pages(vcpu); | |
1908 | return 1; | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | if (!vcpu->pio.in) | |
1913 | return pio_copy_data(vcpu); | |
1914 | return 0; | |
1915 | } | |
1916 | EXPORT_SYMBOL_GPL(kvm_setup_pio); | |
1917 | ||
bccf2150 | 1918 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1919 | { |
6aa8b732 | 1920 | int r; |
1961d276 | 1921 | sigset_t sigsaved; |
6aa8b732 | 1922 | |
bccf2150 | 1923 | vcpu_load(vcpu); |
6aa8b732 | 1924 | |
1961d276 AK |
1925 | if (vcpu->sigset_active) |
1926 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1927 | ||
54810342 DL |
1928 | /* re-sync apic's tpr */ |
1929 | vcpu->cr8 = kvm_run->cr8; | |
1930 | ||
02c83209 AK |
1931 | if (vcpu->pio.cur_count) { |
1932 | r = complete_pio(vcpu); | |
1933 | if (r) | |
1934 | goto out; | |
1935 | } | |
1936 | ||
1937 | if (vcpu->mmio_needed) { | |
1938 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
1939 | vcpu->mmio_read_completed = 1; | |
1940 | vcpu->mmio_needed = 0; | |
1941 | r = emulate_instruction(vcpu, kvm_run, | |
1942 | vcpu->mmio_fault_cr2, 0); | |
1943 | if (r == EMULATE_DO_MMIO) { | |
1944 | /* | |
1945 | * Read-modify-write. Back to userspace. | |
1946 | */ | |
1947 | kvm_run->exit_reason = KVM_EXIT_MMIO; | |
1948 | r = 0; | |
1949 | goto out; | |
46fc1477 | 1950 | } |
6aa8b732 AK |
1951 | } |
1952 | ||
8eb7d334 | 1953 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
b4e63f56 AK |
1954 | kvm_arch_ops->cache_regs(vcpu); |
1955 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; | |
1956 | kvm_arch_ops->decache_regs(vcpu); | |
1957 | } | |
1958 | ||
6aa8b732 AK |
1959 | r = kvm_arch_ops->run(vcpu, kvm_run); |
1960 | ||
039576c0 | 1961 | out: |
1961d276 AK |
1962 | if (vcpu->sigset_active) |
1963 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1964 | ||
6aa8b732 AK |
1965 | vcpu_put(vcpu); |
1966 | return r; | |
1967 | } | |
1968 | ||
bccf2150 AK |
1969 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
1970 | struct kvm_regs *regs) | |
6aa8b732 | 1971 | { |
bccf2150 | 1972 | vcpu_load(vcpu); |
6aa8b732 AK |
1973 | |
1974 | kvm_arch_ops->cache_regs(vcpu); | |
1975 | ||
1976 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
1977 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
1978 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
1979 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
1980 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
1981 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
1982 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
1983 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 1984 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1985 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
1986 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
1987 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
1988 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
1989 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
1990 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
1991 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
1992 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
1993 | #endif | |
1994 | ||
1995 | regs->rip = vcpu->rip; | |
1996 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
1997 | ||
1998 | /* | |
1999 | * Don't leak debug flags in case they were set for guest debugging | |
2000 | */ | |
2001 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
2002 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
2003 | ||
2004 | vcpu_put(vcpu); | |
2005 | ||
2006 | return 0; | |
2007 | } | |
2008 | ||
bccf2150 AK |
2009 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
2010 | struct kvm_regs *regs) | |
6aa8b732 | 2011 | { |
bccf2150 | 2012 | vcpu_load(vcpu); |
6aa8b732 AK |
2013 | |
2014 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
2015 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
2016 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
2017 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
2018 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
2019 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
2020 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
2021 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 2022 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2023 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
2024 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
2025 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
2026 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
2027 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
2028 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
2029 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
2030 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
2031 | #endif | |
2032 | ||
2033 | vcpu->rip = regs->rip; | |
2034 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
2035 | ||
2036 | kvm_arch_ops->decache_regs(vcpu); | |
2037 | ||
2038 | vcpu_put(vcpu); | |
2039 | ||
2040 | return 0; | |
2041 | } | |
2042 | ||
2043 | static void get_segment(struct kvm_vcpu *vcpu, | |
2044 | struct kvm_segment *var, int seg) | |
2045 | { | |
2046 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
2047 | } | |
2048 | ||
bccf2150 AK |
2049 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
2050 | struct kvm_sregs *sregs) | |
6aa8b732 | 2051 | { |
6aa8b732 AK |
2052 | struct descriptor_table dt; |
2053 | ||
bccf2150 | 2054 | vcpu_load(vcpu); |
6aa8b732 AK |
2055 | |
2056 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2057 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2058 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2059 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2060 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2061 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2062 | ||
2063 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2064 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2065 | ||
2066 | kvm_arch_ops->get_idt(vcpu, &dt); | |
2067 | sregs->idt.limit = dt.limit; | |
2068 | sregs->idt.base = dt.base; | |
2069 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
2070 | sregs->gdt.limit = dt.limit; | |
2071 | sregs->gdt.base = dt.base; | |
2072 | ||
25c4c276 | 2073 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
2074 | sregs->cr0 = vcpu->cr0; |
2075 | sregs->cr2 = vcpu->cr2; | |
2076 | sregs->cr3 = vcpu->cr3; | |
2077 | sregs->cr4 = vcpu->cr4; | |
2078 | sregs->cr8 = vcpu->cr8; | |
2079 | sregs->efer = vcpu->shadow_efer; | |
2080 | sregs->apic_base = vcpu->apic_base; | |
2081 | ||
2082 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
2083 | sizeof sregs->interrupt_bitmap); | |
2084 | ||
2085 | vcpu_put(vcpu); | |
2086 | ||
2087 | return 0; | |
2088 | } | |
2089 | ||
2090 | static void set_segment(struct kvm_vcpu *vcpu, | |
2091 | struct kvm_segment *var, int seg) | |
2092 | { | |
2093 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
2094 | } | |
2095 | ||
bccf2150 AK |
2096 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
2097 | struct kvm_sregs *sregs) | |
6aa8b732 | 2098 | { |
6aa8b732 AK |
2099 | int mmu_reset_needed = 0; |
2100 | int i; | |
2101 | struct descriptor_table dt; | |
2102 | ||
bccf2150 | 2103 | vcpu_load(vcpu); |
6aa8b732 | 2104 | |
6aa8b732 AK |
2105 | dt.limit = sregs->idt.limit; |
2106 | dt.base = sregs->idt.base; | |
2107 | kvm_arch_ops->set_idt(vcpu, &dt); | |
2108 | dt.limit = sregs->gdt.limit; | |
2109 | dt.base = sregs->gdt.base; | |
2110 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
2111 | ||
2112 | vcpu->cr2 = sregs->cr2; | |
2113 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2114 | vcpu->cr3 = sregs->cr3; | |
2115 | ||
2116 | vcpu->cr8 = sregs->cr8; | |
2117 | ||
2118 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2119 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2120 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
2121 | #endif | |
2122 | vcpu->apic_base = sregs->apic_base; | |
2123 | ||
25c4c276 | 2124 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
399badf3 | 2125 | |
6aa8b732 | 2126 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
f6528b03 | 2127 | kvm_arch_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2128 | |
2129 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
2130 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
2131 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2132 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2133 | |
2134 | if (mmu_reset_needed) | |
2135 | kvm_mmu_reset_context(vcpu); | |
2136 | ||
2137 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2138 | sizeof vcpu->irq_pending); | |
2139 | vcpu->irq_summary = 0; | |
2140 | for (i = 0; i < NR_IRQ_WORDS; ++i) | |
2141 | if (vcpu->irq_pending[i]) | |
2142 | __set_bit(i, &vcpu->irq_summary); | |
2143 | ||
024aa1c0 AK |
2144 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2145 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2146 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2147 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2148 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2149 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2150 | ||
2151 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2152 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2153 | ||
6aa8b732 AK |
2154 | vcpu_put(vcpu); |
2155 | ||
2156 | return 0; | |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2161 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2162 | * |
2163 | * This list is modified at module load time to reflect the | |
2164 | * capabilities of the host cpu. | |
6aa8b732 AK |
2165 | */ |
2166 | static u32 msrs_to_save[] = { | |
2167 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2168 | MSR_K6_STAR, | |
05b3e0c2 | 2169 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2170 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2171 | #endif | |
2172 | MSR_IA32_TIME_STAMP_COUNTER, | |
2173 | }; | |
2174 | ||
bf591b24 MR |
2175 | static unsigned num_msrs_to_save; |
2176 | ||
6f00e68f AK |
2177 | static u32 emulated_msrs[] = { |
2178 | MSR_IA32_MISC_ENABLE, | |
2179 | }; | |
2180 | ||
bf591b24 MR |
2181 | static __init void kvm_init_msr_list(void) |
2182 | { | |
2183 | u32 dummy[2]; | |
2184 | unsigned i, j; | |
2185 | ||
2186 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2187 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2188 | continue; | |
2189 | if (j < i) | |
2190 | msrs_to_save[j] = msrs_to_save[i]; | |
2191 | j++; | |
2192 | } | |
2193 | num_msrs_to_save = j; | |
2194 | } | |
6aa8b732 AK |
2195 | |
2196 | /* | |
2197 | * Adapt set_msr() to msr_io()'s calling convention | |
2198 | */ | |
2199 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2200 | { | |
2201 | return set_msr(vcpu, index, *data); | |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2206 | * | |
2207 | * @return number of msrs set successfully. | |
2208 | */ | |
bccf2150 | 2209 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2210 | struct kvm_msr_entry *entries, |
2211 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2212 | unsigned index, u64 *data)) | |
2213 | { | |
6aa8b732 AK |
2214 | int i; |
2215 | ||
bccf2150 | 2216 | vcpu_load(vcpu); |
6aa8b732 AK |
2217 | |
2218 | for (i = 0; i < msrs->nmsrs; ++i) | |
2219 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2220 | break; | |
2221 | ||
2222 | vcpu_put(vcpu); | |
2223 | ||
2224 | return i; | |
2225 | } | |
2226 | ||
2227 | /* | |
2228 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2229 | * | |
2230 | * @return number of msrs set successfully. | |
2231 | */ | |
bccf2150 | 2232 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2233 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2234 | unsigned index, u64 *data), | |
2235 | int writeback) | |
2236 | { | |
2237 | struct kvm_msrs msrs; | |
2238 | struct kvm_msr_entry *entries; | |
2239 | int r, n; | |
2240 | unsigned size; | |
2241 | ||
2242 | r = -EFAULT; | |
2243 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2244 | goto out; | |
2245 | ||
2246 | r = -E2BIG; | |
2247 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2248 | goto out; | |
2249 | ||
2250 | r = -ENOMEM; | |
2251 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2252 | entries = vmalloc(size); | |
2253 | if (!entries) | |
2254 | goto out; | |
2255 | ||
2256 | r = -EFAULT; | |
2257 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2258 | goto out_free; | |
2259 | ||
bccf2150 | 2260 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2261 | if (r < 0) |
2262 | goto out_free; | |
2263 | ||
2264 | r = -EFAULT; | |
2265 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2266 | goto out_free; | |
2267 | ||
2268 | r = n; | |
2269 | ||
2270 | out_free: | |
2271 | vfree(entries); | |
2272 | out: | |
2273 | return r; | |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * Translate a guest virtual address to a guest physical address. | |
2278 | */ | |
bccf2150 AK |
2279 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2280 | struct kvm_translation *tr) | |
6aa8b732 AK |
2281 | { |
2282 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2283 | gpa_t gpa; |
2284 | ||
bccf2150 AK |
2285 | vcpu_load(vcpu); |
2286 | spin_lock(&vcpu->kvm->lock); | |
6aa8b732 AK |
2287 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2288 | tr->physical_address = gpa; | |
2289 | tr->valid = gpa != UNMAPPED_GVA; | |
2290 | tr->writeable = 1; | |
2291 | tr->usermode = 0; | |
bccf2150 | 2292 | spin_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2293 | vcpu_put(vcpu); |
2294 | ||
2295 | return 0; | |
2296 | } | |
2297 | ||
bccf2150 AK |
2298 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2299 | struct kvm_interrupt *irq) | |
6aa8b732 | 2300 | { |
6aa8b732 AK |
2301 | if (irq->irq < 0 || irq->irq >= 256) |
2302 | return -EINVAL; | |
bccf2150 | 2303 | vcpu_load(vcpu); |
6aa8b732 AK |
2304 | |
2305 | set_bit(irq->irq, vcpu->irq_pending); | |
2306 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2307 | ||
2308 | vcpu_put(vcpu); | |
2309 | ||
2310 | return 0; | |
2311 | } | |
2312 | ||
bccf2150 AK |
2313 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2314 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2315 | { |
6aa8b732 AK |
2316 | int r; |
2317 | ||
bccf2150 | 2318 | vcpu_load(vcpu); |
6aa8b732 AK |
2319 | |
2320 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
2321 | ||
2322 | vcpu_put(vcpu); | |
2323 | ||
2324 | return r; | |
2325 | } | |
2326 | ||
9a2bb7f4 AK |
2327 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2328 | unsigned long address, | |
2329 | int *type) | |
2330 | { | |
2331 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2332 | unsigned long pgoff; | |
2333 | struct page *page; | |
2334 | ||
2335 | *type = VM_FAULT_MINOR; | |
2336 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
039576c0 AK |
2337 | if (pgoff == 0) |
2338 | page = virt_to_page(vcpu->run); | |
2339 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2340 | page = virt_to_page(vcpu->pio_data); | |
2341 | else | |
9a2bb7f4 | 2342 | return NOPAGE_SIGBUS; |
9a2bb7f4 AK |
2343 | get_page(page); |
2344 | return page; | |
2345 | } | |
2346 | ||
2347 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2348 | .nopage = kvm_vcpu_nopage, | |
2349 | }; | |
2350 | ||
2351 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2352 | { | |
2353 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2354 | return 0; | |
2355 | } | |
2356 | ||
bccf2150 AK |
2357 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2358 | { | |
2359 | struct kvm_vcpu *vcpu = filp->private_data; | |
2360 | ||
2361 | fput(vcpu->kvm->filp); | |
2362 | return 0; | |
2363 | } | |
2364 | ||
2365 | static struct file_operations kvm_vcpu_fops = { | |
2366 | .release = kvm_vcpu_release, | |
2367 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2368 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2369 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2370 | }; |
2371 | ||
2372 | /* | |
2373 | * Allocates an inode for the vcpu. | |
2374 | */ | |
2375 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2376 | { | |
2377 | int fd, r; | |
2378 | struct inode *inode; | |
2379 | struct file *file; | |
2380 | ||
2381 | atomic_inc(&vcpu->kvm->filp->f_count); | |
2382 | inode = kvmfs_inode(&kvm_vcpu_fops); | |
2383 | if (IS_ERR(inode)) { | |
2384 | r = PTR_ERR(inode); | |
2385 | goto out1; | |
2386 | } | |
2387 | ||
2388 | file = kvmfs_file(inode, vcpu); | |
2389 | if (IS_ERR(file)) { | |
2390 | r = PTR_ERR(file); | |
2391 | goto out2; | |
2392 | } | |
2393 | ||
2394 | r = get_unused_fd(); | |
2395 | if (r < 0) | |
2396 | goto out3; | |
2397 | fd = r; | |
2398 | fd_install(fd, file); | |
2399 | ||
2400 | return fd; | |
2401 | ||
2402 | out3: | |
2403 | fput(file); | |
2404 | out2: | |
2405 | iput(inode); | |
2406 | out1: | |
2407 | fput(vcpu->kvm->filp); | |
2408 | return r; | |
2409 | } | |
2410 | ||
c5ea7660 AK |
2411 | /* |
2412 | * Creates some virtual cpus. Good luck creating more than one. | |
2413 | */ | |
2414 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2415 | { | |
2416 | int r; | |
2417 | struct kvm_vcpu *vcpu; | |
9a2bb7f4 | 2418 | struct page *page; |
c5ea7660 AK |
2419 | |
2420 | r = -EINVAL; | |
2421 | if (!valid_vcpu(n)) | |
2422 | goto out; | |
2423 | ||
2424 | vcpu = &kvm->vcpus[n]; | |
2425 | ||
2426 | mutex_lock(&vcpu->mutex); | |
2427 | ||
2428 | if (vcpu->vmcs) { | |
2429 | mutex_unlock(&vcpu->mutex); | |
2430 | return -EEXIST; | |
2431 | } | |
2432 | ||
9a2bb7f4 AK |
2433 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2434 | r = -ENOMEM; | |
2435 | if (!page) | |
2436 | goto out_unlock; | |
2437 | vcpu->run = page_address(page); | |
2438 | ||
039576c0 AK |
2439 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2440 | r = -ENOMEM; | |
2441 | if (!page) | |
2442 | goto out_free_run; | |
2443 | vcpu->pio_data = page_address(page); | |
2444 | ||
c5ea7660 AK |
2445 | vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf, |
2446 | FX_IMAGE_ALIGN); | |
2447 | vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE; | |
d917a6b9 | 2448 | vcpu->cr0 = 0x10; |
c5ea7660 AK |
2449 | |
2450 | r = kvm_arch_ops->vcpu_create(vcpu); | |
2451 | if (r < 0) | |
2452 | goto out_free_vcpus; | |
2453 | ||
2454 | r = kvm_mmu_create(vcpu); | |
2455 | if (r < 0) | |
2456 | goto out_free_vcpus; | |
2457 | ||
2458 | kvm_arch_ops->vcpu_load(vcpu); | |
2459 | r = kvm_mmu_setup(vcpu); | |
2460 | if (r >= 0) | |
2461 | r = kvm_arch_ops->vcpu_setup(vcpu); | |
2462 | vcpu_put(vcpu); | |
2463 | ||
2464 | if (r < 0) | |
2465 | goto out_free_vcpus; | |
2466 | ||
bccf2150 AK |
2467 | r = create_vcpu_fd(vcpu); |
2468 | if (r < 0) | |
2469 | goto out_free_vcpus; | |
2470 | ||
39c3b86e AK |
2471 | spin_lock(&kvm_lock); |
2472 | if (n >= kvm->nvcpus) | |
2473 | kvm->nvcpus = n + 1; | |
2474 | spin_unlock(&kvm_lock); | |
2475 | ||
bccf2150 | 2476 | return r; |
c5ea7660 AK |
2477 | |
2478 | out_free_vcpus: | |
2479 | kvm_free_vcpu(vcpu); | |
039576c0 AK |
2480 | out_free_run: |
2481 | free_page((unsigned long)vcpu->run); | |
2482 | vcpu->run = NULL; | |
9a2bb7f4 | 2483 | out_unlock: |
c5ea7660 AK |
2484 | mutex_unlock(&vcpu->mutex); |
2485 | out: | |
2486 | return r; | |
2487 | } | |
2488 | ||
2cc51560 ED |
2489 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
2490 | { | |
2491 | u64 efer; | |
2492 | int i; | |
2493 | struct kvm_cpuid_entry *e, *entry; | |
2494 | ||
2495 | rdmsrl(MSR_EFER, efer); | |
2496 | entry = NULL; | |
2497 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
2498 | e = &vcpu->cpuid_entries[i]; | |
2499 | if (e->function == 0x80000001) { | |
2500 | entry = e; | |
2501 | break; | |
2502 | } | |
2503 | } | |
2504 | if (entry && (entry->edx & EFER_NX) && !(efer & EFER_NX)) { | |
2505 | entry->edx &= ~(1 << 20); | |
2506 | printk(KERN_INFO ": guest NX capability removed\n"); | |
2507 | } | |
2508 | } | |
2509 | ||
06465c5a AK |
2510 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2511 | struct kvm_cpuid *cpuid, | |
2512 | struct kvm_cpuid_entry __user *entries) | |
2513 | { | |
2514 | int r; | |
2515 | ||
2516 | r = -E2BIG; | |
2517 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2518 | goto out; | |
2519 | r = -EFAULT; | |
2520 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2521 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2522 | goto out; | |
2523 | vcpu->cpuid_nent = cpuid->nent; | |
2cc51560 | 2524 | cpuid_fix_nx_cap(vcpu); |
06465c5a AK |
2525 | return 0; |
2526 | ||
2527 | out: | |
2528 | return r; | |
2529 | } | |
2530 | ||
1961d276 AK |
2531 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2532 | { | |
2533 | if (sigset) { | |
2534 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2535 | vcpu->sigset_active = 1; | |
2536 | vcpu->sigset = *sigset; | |
2537 | } else | |
2538 | vcpu->sigset_active = 0; | |
2539 | return 0; | |
2540 | } | |
2541 | ||
b8836737 AK |
2542 | /* |
2543 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2544 | * we have asm/x86/processor.h | |
2545 | */ | |
2546 | struct fxsave { | |
2547 | u16 cwd; | |
2548 | u16 swd; | |
2549 | u16 twd; | |
2550 | u16 fop; | |
2551 | u64 rip; | |
2552 | u64 rdp; | |
2553 | u32 mxcsr; | |
2554 | u32 mxcsr_mask; | |
2555 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2556 | #ifdef CONFIG_X86_64 | |
2557 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2558 | #else | |
2559 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2560 | #endif | |
2561 | }; | |
2562 | ||
2563 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2564 | { | |
2565 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2566 | ||
2567 | vcpu_load(vcpu); | |
2568 | ||
2569 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2570 | fpu->fcw = fxsave->cwd; | |
2571 | fpu->fsw = fxsave->swd; | |
2572 | fpu->ftwx = fxsave->twd; | |
2573 | fpu->last_opcode = fxsave->fop; | |
2574 | fpu->last_ip = fxsave->rip; | |
2575 | fpu->last_dp = fxsave->rdp; | |
2576 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2577 | ||
2578 | vcpu_put(vcpu); | |
2579 | ||
2580 | return 0; | |
2581 | } | |
2582 | ||
2583 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2584 | { | |
2585 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2586 | ||
2587 | vcpu_load(vcpu); | |
2588 | ||
2589 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2590 | fxsave->cwd = fpu->fcw; | |
2591 | fxsave->swd = fpu->fsw; | |
2592 | fxsave->twd = fpu->ftwx; | |
2593 | fxsave->fop = fpu->last_opcode; | |
2594 | fxsave->rip = fpu->last_ip; | |
2595 | fxsave->rdp = fpu->last_dp; | |
2596 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2597 | ||
2598 | vcpu_put(vcpu); | |
2599 | ||
2600 | return 0; | |
2601 | } | |
2602 | ||
bccf2150 AK |
2603 | static long kvm_vcpu_ioctl(struct file *filp, |
2604 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2605 | { |
bccf2150 | 2606 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2607 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2608 | int r = -EINVAL; |
2609 | ||
2610 | switch (ioctl) { | |
9a2bb7f4 | 2611 | case KVM_RUN: |
f0fe5108 AK |
2612 | r = -EINVAL; |
2613 | if (arg) | |
2614 | goto out; | |
9a2bb7f4 | 2615 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2616 | break; |
6aa8b732 AK |
2617 | case KVM_GET_REGS: { |
2618 | struct kvm_regs kvm_regs; | |
2619 | ||
bccf2150 AK |
2620 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2621 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2622 | if (r) |
2623 | goto out; | |
2624 | r = -EFAULT; | |
2f366987 | 2625 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2626 | goto out; |
2627 | r = 0; | |
2628 | break; | |
2629 | } | |
2630 | case KVM_SET_REGS: { | |
2631 | struct kvm_regs kvm_regs; | |
2632 | ||
2633 | r = -EFAULT; | |
2f366987 | 2634 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2635 | goto out; |
bccf2150 | 2636 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2637 | if (r) |
2638 | goto out; | |
2639 | r = 0; | |
2640 | break; | |
2641 | } | |
2642 | case KVM_GET_SREGS: { | |
2643 | struct kvm_sregs kvm_sregs; | |
2644 | ||
bccf2150 AK |
2645 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2646 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2647 | if (r) |
2648 | goto out; | |
2649 | r = -EFAULT; | |
2f366987 | 2650 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2651 | goto out; |
2652 | r = 0; | |
2653 | break; | |
2654 | } | |
2655 | case KVM_SET_SREGS: { | |
2656 | struct kvm_sregs kvm_sregs; | |
2657 | ||
2658 | r = -EFAULT; | |
2f366987 | 2659 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2660 | goto out; |
bccf2150 | 2661 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2662 | if (r) |
2663 | goto out; | |
2664 | r = 0; | |
2665 | break; | |
2666 | } | |
2667 | case KVM_TRANSLATE: { | |
2668 | struct kvm_translation tr; | |
2669 | ||
2670 | r = -EFAULT; | |
2f366987 | 2671 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2672 | goto out; |
bccf2150 | 2673 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2674 | if (r) |
2675 | goto out; | |
2676 | r = -EFAULT; | |
2f366987 | 2677 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2678 | goto out; |
2679 | r = 0; | |
2680 | break; | |
2681 | } | |
2682 | case KVM_INTERRUPT: { | |
2683 | struct kvm_interrupt irq; | |
2684 | ||
2685 | r = -EFAULT; | |
2f366987 | 2686 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2687 | goto out; |
bccf2150 | 2688 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2689 | if (r) |
2690 | goto out; | |
2691 | r = 0; | |
2692 | break; | |
2693 | } | |
2694 | case KVM_DEBUG_GUEST: { | |
2695 | struct kvm_debug_guest dbg; | |
2696 | ||
2697 | r = -EFAULT; | |
2f366987 | 2698 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2699 | goto out; |
bccf2150 | 2700 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2701 | if (r) |
2702 | goto out; | |
2703 | r = 0; | |
2704 | break; | |
2705 | } | |
bccf2150 AK |
2706 | case KVM_GET_MSRS: |
2707 | r = msr_io(vcpu, argp, get_msr, 1); | |
2708 | break; | |
2709 | case KVM_SET_MSRS: | |
2710 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2711 | break; | |
06465c5a AK |
2712 | case KVM_SET_CPUID: { |
2713 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2714 | struct kvm_cpuid cpuid; | |
2715 | ||
2716 | r = -EFAULT; | |
2717 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2718 | goto out; | |
2719 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2720 | if (r) | |
2721 | goto out; | |
2722 | break; | |
2723 | } | |
1961d276 AK |
2724 | case KVM_SET_SIGNAL_MASK: { |
2725 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2726 | struct kvm_signal_mask kvm_sigmask; | |
2727 | sigset_t sigset, *p; | |
2728 | ||
2729 | p = NULL; | |
2730 | if (argp) { | |
2731 | r = -EFAULT; | |
2732 | if (copy_from_user(&kvm_sigmask, argp, | |
2733 | sizeof kvm_sigmask)) | |
2734 | goto out; | |
2735 | r = -EINVAL; | |
2736 | if (kvm_sigmask.len != sizeof sigset) | |
2737 | goto out; | |
2738 | r = -EFAULT; | |
2739 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2740 | sizeof sigset)) | |
2741 | goto out; | |
2742 | p = &sigset; | |
2743 | } | |
2744 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2745 | break; | |
2746 | } | |
b8836737 AK |
2747 | case KVM_GET_FPU: { |
2748 | struct kvm_fpu fpu; | |
2749 | ||
2750 | memset(&fpu, 0, sizeof fpu); | |
2751 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
2752 | if (r) | |
2753 | goto out; | |
2754 | r = -EFAULT; | |
2755 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
2756 | goto out; | |
2757 | r = 0; | |
2758 | break; | |
2759 | } | |
2760 | case KVM_SET_FPU: { | |
2761 | struct kvm_fpu fpu; | |
2762 | ||
2763 | r = -EFAULT; | |
2764 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
2765 | goto out; | |
2766 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
2767 | if (r) | |
2768 | goto out; | |
2769 | r = 0; | |
2770 | break; | |
2771 | } | |
bccf2150 AK |
2772 | default: |
2773 | ; | |
2774 | } | |
2775 | out: | |
2776 | return r; | |
2777 | } | |
2778 | ||
2779 | static long kvm_vm_ioctl(struct file *filp, | |
2780 | unsigned int ioctl, unsigned long arg) | |
2781 | { | |
2782 | struct kvm *kvm = filp->private_data; | |
2783 | void __user *argp = (void __user *)arg; | |
2784 | int r = -EINVAL; | |
2785 | ||
2786 | switch (ioctl) { | |
2787 | case KVM_CREATE_VCPU: | |
2788 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2789 | if (r < 0) | |
2790 | goto out; | |
2791 | break; | |
6aa8b732 AK |
2792 | case KVM_SET_MEMORY_REGION: { |
2793 | struct kvm_memory_region kvm_mem; | |
2794 | ||
2795 | r = -EFAULT; | |
2f366987 | 2796 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2797 | goto out; |
2c6f5df9 | 2798 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2799 | if (r) |
2800 | goto out; | |
2801 | break; | |
2802 | } | |
2803 | case KVM_GET_DIRTY_LOG: { | |
2804 | struct kvm_dirty_log log; | |
2805 | ||
2806 | r = -EFAULT; | |
2f366987 | 2807 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2808 | goto out; |
2c6f5df9 | 2809 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2810 | if (r) |
2811 | goto out; | |
2812 | break; | |
2813 | } | |
e8207547 AK |
2814 | case KVM_SET_MEMORY_ALIAS: { |
2815 | struct kvm_memory_alias alias; | |
2816 | ||
2817 | r = -EFAULT; | |
2818 | if (copy_from_user(&alias, argp, sizeof alias)) | |
2819 | goto out; | |
2820 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
2821 | if (r) | |
2822 | goto out; | |
2823 | break; | |
2824 | } | |
f17abe9a AK |
2825 | default: |
2826 | ; | |
2827 | } | |
2828 | out: | |
2829 | return r; | |
2830 | } | |
2831 | ||
2832 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2833 | unsigned long address, | |
2834 | int *type) | |
2835 | { | |
2836 | struct kvm *kvm = vma->vm_file->private_data; | |
2837 | unsigned long pgoff; | |
f17abe9a AK |
2838 | struct page *page; |
2839 | ||
2840 | *type = VM_FAULT_MINOR; | |
2841 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
954bbbc2 | 2842 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
2843 | if (!page) |
2844 | return NOPAGE_SIGBUS; | |
2845 | get_page(page); | |
2846 | return page; | |
2847 | } | |
2848 | ||
2849 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2850 | .nopage = kvm_vm_nopage, | |
2851 | }; | |
2852 | ||
2853 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2854 | { | |
2855 | vma->vm_ops = &kvm_vm_vm_ops; | |
2856 | return 0; | |
2857 | } | |
2858 | ||
2859 | static struct file_operations kvm_vm_fops = { | |
2860 | .release = kvm_vm_release, | |
2861 | .unlocked_ioctl = kvm_vm_ioctl, | |
2862 | .compat_ioctl = kvm_vm_ioctl, | |
2863 | .mmap = kvm_vm_mmap, | |
2864 | }; | |
2865 | ||
2866 | static int kvm_dev_ioctl_create_vm(void) | |
2867 | { | |
2868 | int fd, r; | |
2869 | struct inode *inode; | |
2870 | struct file *file; | |
2871 | struct kvm *kvm; | |
2872 | ||
2873 | inode = kvmfs_inode(&kvm_vm_fops); | |
2874 | if (IS_ERR(inode)) { | |
2875 | r = PTR_ERR(inode); | |
2876 | goto out1; | |
2877 | } | |
2878 | ||
2879 | kvm = kvm_create_vm(); | |
2880 | if (IS_ERR(kvm)) { | |
2881 | r = PTR_ERR(kvm); | |
2882 | goto out2; | |
2883 | } | |
2884 | ||
2885 | file = kvmfs_file(inode, kvm); | |
2886 | if (IS_ERR(file)) { | |
2887 | r = PTR_ERR(file); | |
2888 | goto out3; | |
2889 | } | |
bccf2150 | 2890 | kvm->filp = file; |
f17abe9a AK |
2891 | |
2892 | r = get_unused_fd(); | |
2893 | if (r < 0) | |
2894 | goto out4; | |
2895 | fd = r; | |
2896 | fd_install(fd, file); | |
2897 | ||
2898 | return fd; | |
2899 | ||
2900 | out4: | |
2901 | fput(file); | |
2902 | out3: | |
2903 | kvm_destroy_vm(kvm); | |
2904 | out2: | |
2905 | iput(inode); | |
2906 | out1: | |
2907 | return r; | |
2908 | } | |
2909 | ||
2910 | static long kvm_dev_ioctl(struct file *filp, | |
2911 | unsigned int ioctl, unsigned long arg) | |
2912 | { | |
2913 | void __user *argp = (void __user *)arg; | |
07c45a36 | 2914 | long r = -EINVAL; |
f17abe9a AK |
2915 | |
2916 | switch (ioctl) { | |
2917 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2918 | r = -EINVAL; |
2919 | if (arg) | |
2920 | goto out; | |
f17abe9a AK |
2921 | r = KVM_API_VERSION; |
2922 | break; | |
2923 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2924 | r = -EINVAL; |
2925 | if (arg) | |
2926 | goto out; | |
f17abe9a AK |
2927 | r = kvm_dev_ioctl_create_vm(); |
2928 | break; | |
6aa8b732 | 2929 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 2930 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
2931 | struct kvm_msr_list msr_list; |
2932 | unsigned n; | |
2933 | ||
2934 | r = -EFAULT; | |
2935 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2936 | goto out; | |
2937 | n = msr_list.nmsrs; | |
6f00e68f | 2938 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
2939 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2940 | goto out; | |
2941 | r = -E2BIG; | |
bf591b24 | 2942 | if (n < num_msrs_to_save) |
6aa8b732 AK |
2943 | goto out; |
2944 | r = -EFAULT; | |
2945 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 2946 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 2947 | goto out; |
6f00e68f AK |
2948 | if (copy_to_user(user_msr_list->indices |
2949 | + num_msrs_to_save * sizeof(u32), | |
2950 | &emulated_msrs, | |
2951 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2952 | goto out; | |
6aa8b732 | 2953 | r = 0; |
cc1d8955 | 2954 | break; |
6aa8b732 | 2955 | } |
5d308f45 AK |
2956 | case KVM_CHECK_EXTENSION: |
2957 | /* | |
2958 | * No extensions defined at present. | |
2959 | */ | |
2960 | r = 0; | |
2961 | break; | |
07c45a36 AK |
2962 | case KVM_GET_VCPU_MMAP_SIZE: |
2963 | r = -EINVAL; | |
2964 | if (arg) | |
2965 | goto out; | |
039576c0 | 2966 | r = 2 * PAGE_SIZE; |
07c45a36 | 2967 | break; |
6aa8b732 AK |
2968 | default: |
2969 | ; | |
2970 | } | |
2971 | out: | |
2972 | return r; | |
2973 | } | |
2974 | ||
6aa8b732 AK |
2975 | static struct file_operations kvm_chardev_ops = { |
2976 | .open = kvm_dev_open, | |
2977 | .release = kvm_dev_release, | |
2978 | .unlocked_ioctl = kvm_dev_ioctl, | |
2979 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2980 | }; |
2981 | ||
2982 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2983 | KVM_MINOR, |
6aa8b732 AK |
2984 | "kvm", |
2985 | &kvm_chardev_ops, | |
2986 | }; | |
2987 | ||
2988 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, | |
2989 | void *v) | |
2990 | { | |
2991 | if (val == SYS_RESTART) { | |
2992 | /* | |
2993 | * Some (well, at least mine) BIOSes hang on reboot if | |
2994 | * in vmx root mode. | |
2995 | */ | |
2996 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
8b6d44c7 | 2997 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 AK |
2998 | } |
2999 | return NOTIFY_OK; | |
3000 | } | |
3001 | ||
3002 | static struct notifier_block kvm_reboot_notifier = { | |
3003 | .notifier_call = kvm_reboot, | |
3004 | .priority = 0, | |
3005 | }; | |
3006 | ||
774c47f1 AK |
3007 | /* |
3008 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
3009 | * cached on it. | |
3010 | */ | |
3011 | static void decache_vcpus_on_cpu(int cpu) | |
3012 | { | |
3013 | struct kvm *vm; | |
3014 | struct kvm_vcpu *vcpu; | |
3015 | int i; | |
3016 | ||
3017 | spin_lock(&kvm_lock); | |
3018 | list_for_each_entry(vm, &vm_list, vm_list) | |
3019 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
3020 | vcpu = &vm->vcpus[i]; | |
3021 | /* | |
3022 | * If the vcpu is locked, then it is running on some | |
3023 | * other cpu and therefore it is not cached on the | |
3024 | * cpu in question. | |
3025 | * | |
3026 | * If it's not locked, check the last cpu it executed | |
3027 | * on. | |
3028 | */ | |
3029 | if (mutex_trylock(&vcpu->mutex)) { | |
3030 | if (vcpu->cpu == cpu) { | |
3031 | kvm_arch_ops->vcpu_decache(vcpu); | |
3032 | vcpu->cpu = -1; | |
3033 | } | |
3034 | mutex_unlock(&vcpu->mutex); | |
3035 | } | |
3036 | } | |
3037 | spin_unlock(&kvm_lock); | |
3038 | } | |
3039 | ||
3040 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, | |
3041 | void *v) | |
3042 | { | |
3043 | int cpu = (long)v; | |
3044 | ||
3045 | switch (val) { | |
43934a38 | 3046 | case CPU_DOWN_PREPARE: |
8bb78442 | 3047 | case CPU_DOWN_PREPARE_FROZEN: |
774c47f1 | 3048 | case CPU_UP_CANCELED: |
8bb78442 | 3049 | case CPU_UP_CANCELED_FROZEN: |
43934a38 JK |
3050 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3051 | cpu); | |
774c47f1 AK |
3052 | decache_vcpus_on_cpu(cpu); |
3053 | smp_call_function_single(cpu, kvm_arch_ops->hardware_disable, | |
3054 | NULL, 0, 1); | |
3055 | break; | |
43934a38 | 3056 | case CPU_ONLINE: |
8bb78442 | 3057 | case CPU_ONLINE_FROZEN: |
43934a38 JK |
3058 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
3059 | cpu); | |
774c47f1 AK |
3060 | smp_call_function_single(cpu, kvm_arch_ops->hardware_enable, |
3061 | NULL, 0, 1); | |
3062 | break; | |
3063 | } | |
3064 | return NOTIFY_OK; | |
3065 | } | |
3066 | ||
2eeb2e94 GH |
3067 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
3068 | { | |
3069 | memset(bus, 0, sizeof(*bus)); | |
3070 | } | |
3071 | ||
3072 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
3073 | { | |
3074 | int i; | |
3075 | ||
3076 | for (i = 0; i < bus->dev_count; i++) { | |
3077 | struct kvm_io_device *pos = bus->devs[i]; | |
3078 | ||
3079 | kvm_iodevice_destructor(pos); | |
3080 | } | |
3081 | } | |
3082 | ||
3083 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr) | |
3084 | { | |
3085 | int i; | |
3086 | ||
3087 | for (i = 0; i < bus->dev_count; i++) { | |
3088 | struct kvm_io_device *pos = bus->devs[i]; | |
3089 | ||
3090 | if (pos->in_range(pos, addr)) | |
3091 | return pos; | |
3092 | } | |
3093 | ||
3094 | return NULL; | |
3095 | } | |
3096 | ||
3097 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
3098 | { | |
3099 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
3100 | ||
3101 | bus->devs[bus->dev_count++] = dev; | |
3102 | } | |
3103 | ||
774c47f1 AK |
3104 | static struct notifier_block kvm_cpu_notifier = { |
3105 | .notifier_call = kvm_cpu_hotplug, | |
3106 | .priority = 20, /* must be > scheduler priority */ | |
3107 | }; | |
3108 | ||
1165f5fe AK |
3109 | static u64 stat_get(void *_offset) |
3110 | { | |
3111 | unsigned offset = (long)_offset; | |
3112 | u64 total = 0; | |
3113 | struct kvm *kvm; | |
3114 | struct kvm_vcpu *vcpu; | |
3115 | int i; | |
3116 | ||
3117 | spin_lock(&kvm_lock); | |
3118 | list_for_each_entry(kvm, &vm_list, vm_list) | |
3119 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
3120 | vcpu = &kvm->vcpus[i]; | |
3121 | total += *(u32 *)((void *)vcpu + offset); | |
3122 | } | |
3123 | spin_unlock(&kvm_lock); | |
3124 | return total; | |
3125 | } | |
3126 | ||
3127 | static void stat_set(void *offset, u64 val) | |
3128 | { | |
3129 | } | |
3130 | ||
3131 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, stat_set, "%llu\n"); | |
3132 | ||
6aa8b732 AK |
3133 | static __init void kvm_init_debug(void) |
3134 | { | |
3135 | struct kvm_stats_debugfs_item *p; | |
3136 | ||
8b6d44c7 | 3137 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 3138 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
3139 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
3140 | (void *)(long)p->offset, | |
3141 | &stat_fops); | |
6aa8b732 AK |
3142 | } |
3143 | ||
3144 | static void kvm_exit_debug(void) | |
3145 | { | |
3146 | struct kvm_stats_debugfs_item *p; | |
3147 | ||
3148 | for (p = debugfs_entries; p->name; ++p) | |
3149 | debugfs_remove(p->dentry); | |
3150 | debugfs_remove(debugfs_dir); | |
3151 | } | |
3152 | ||
59ae6c6b AK |
3153 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
3154 | { | |
3155 | decache_vcpus_on_cpu(raw_smp_processor_id()); | |
19d1408d | 3156 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
59ae6c6b AK |
3157 | return 0; |
3158 | } | |
3159 | ||
3160 | static int kvm_resume(struct sys_device *dev) | |
3161 | { | |
19d1408d | 3162 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
59ae6c6b AK |
3163 | return 0; |
3164 | } | |
3165 | ||
3166 | static struct sysdev_class kvm_sysdev_class = { | |
3167 | set_kset_name("kvm"), | |
3168 | .suspend = kvm_suspend, | |
3169 | .resume = kvm_resume, | |
3170 | }; | |
3171 | ||
3172 | static struct sys_device kvm_sysdev = { | |
3173 | .id = 0, | |
3174 | .cls = &kvm_sysdev_class, | |
3175 | }; | |
3176 | ||
6aa8b732 AK |
3177 | hpa_t bad_page_address; |
3178 | ||
37e29d90 AK |
3179 | static int kvmfs_get_sb(struct file_system_type *fs_type, int flags, |
3180 | const char *dev_name, void *data, struct vfsmount *mnt) | |
3181 | { | |
e9cdb1e3 | 3182 | return get_sb_pseudo(fs_type, "kvm:", NULL, KVMFS_SUPER_MAGIC, mnt); |
37e29d90 AK |
3183 | } |
3184 | ||
3185 | static struct file_system_type kvm_fs_type = { | |
3186 | .name = "kvmfs", | |
3187 | .get_sb = kvmfs_get_sb, | |
3188 | .kill_sb = kill_anon_super, | |
3189 | }; | |
3190 | ||
6aa8b732 AK |
3191 | int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module) |
3192 | { | |
3193 | int r; | |
3194 | ||
09db28b8 YI |
3195 | if (kvm_arch_ops) { |
3196 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
3197 | return -EEXIST; | |
3198 | } | |
3199 | ||
e097f35c | 3200 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
3201 | printk(KERN_ERR "kvm: no hardware support\n"); |
3202 | return -EOPNOTSUPP; | |
3203 | } | |
e097f35c | 3204 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3205 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3206 | return -EOPNOTSUPP; | |
3207 | } | |
3208 | ||
e097f35c YI |
3209 | kvm_arch_ops = ops; |
3210 | ||
6aa8b732 AK |
3211 | r = kvm_arch_ops->hardware_setup(); |
3212 | if (r < 0) | |
ca45aaae | 3213 | goto out; |
6aa8b732 | 3214 | |
8b6d44c7 | 3215 | on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3216 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3217 | if (r) | |
3218 | goto out_free_1; | |
6aa8b732 AK |
3219 | register_reboot_notifier(&kvm_reboot_notifier); |
3220 | ||
59ae6c6b AK |
3221 | r = sysdev_class_register(&kvm_sysdev_class); |
3222 | if (r) | |
3223 | goto out_free_2; | |
3224 | ||
3225 | r = sysdev_register(&kvm_sysdev); | |
3226 | if (r) | |
3227 | goto out_free_3; | |
3228 | ||
6aa8b732 AK |
3229 | kvm_chardev_ops.owner = module; |
3230 | ||
3231 | r = misc_register(&kvm_dev); | |
3232 | if (r) { | |
3233 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
3234 | goto out_free; | |
3235 | } | |
3236 | ||
3237 | return r; | |
3238 | ||
3239 | out_free: | |
59ae6c6b AK |
3240 | sysdev_unregister(&kvm_sysdev); |
3241 | out_free_3: | |
3242 | sysdev_class_unregister(&kvm_sysdev_class); | |
3243 | out_free_2: | |
6aa8b732 | 3244 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3245 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3246 | out_free_1: | |
8b6d44c7 | 3247 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 3248 | kvm_arch_ops->hardware_unsetup(); |
ca45aaae AK |
3249 | out: |
3250 | kvm_arch_ops = NULL; | |
6aa8b732 AK |
3251 | return r; |
3252 | } | |
3253 | ||
3254 | void kvm_exit_arch(void) | |
3255 | { | |
3256 | misc_deregister(&kvm_dev); | |
59ae6c6b AK |
3257 | sysdev_unregister(&kvm_sysdev); |
3258 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3259 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3260 | unregister_cpu_notifier(&kvm_cpu_notifier); |
8b6d44c7 | 3261 | on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1); |
6aa8b732 | 3262 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 3263 | kvm_arch_ops = NULL; |
6aa8b732 AK |
3264 | } |
3265 | ||
3266 | static __init int kvm_init(void) | |
3267 | { | |
3268 | static struct page *bad_page; | |
37e29d90 AK |
3269 | int r; |
3270 | ||
b5a33a75 AK |
3271 | r = kvm_mmu_module_init(); |
3272 | if (r) | |
3273 | goto out4; | |
3274 | ||
37e29d90 AK |
3275 | r = register_filesystem(&kvm_fs_type); |
3276 | if (r) | |
3277 | goto out3; | |
6aa8b732 | 3278 | |
37e29d90 AK |
3279 | kvmfs_mnt = kern_mount(&kvm_fs_type); |
3280 | r = PTR_ERR(kvmfs_mnt); | |
3281 | if (IS_ERR(kvmfs_mnt)) | |
3282 | goto out2; | |
6aa8b732 AK |
3283 | kvm_init_debug(); |
3284 | ||
bf591b24 MR |
3285 | kvm_init_msr_list(); |
3286 | ||
6aa8b732 AK |
3287 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
3288 | r = -ENOMEM; | |
3289 | goto out; | |
3290 | } | |
3291 | ||
3292 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3293 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3294 | ||
58e690e6 | 3295 | return 0; |
6aa8b732 AK |
3296 | |
3297 | out: | |
3298 | kvm_exit_debug(); | |
37e29d90 AK |
3299 | mntput(kvmfs_mnt); |
3300 | out2: | |
3301 | unregister_filesystem(&kvm_fs_type); | |
3302 | out3: | |
b5a33a75 AK |
3303 | kvm_mmu_module_exit(); |
3304 | out4: | |
6aa8b732 AK |
3305 | return r; |
3306 | } | |
3307 | ||
3308 | static __exit void kvm_exit(void) | |
3309 | { | |
3310 | kvm_exit_debug(); | |
3311 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
37e29d90 AK |
3312 | mntput(kvmfs_mnt); |
3313 | unregister_filesystem(&kvm_fs_type); | |
b5a33a75 | 3314 | kvm_mmu_module_exit(); |
6aa8b732 AK |
3315 | } |
3316 | ||
3317 | module_init(kvm_init) | |
3318 | module_exit(kvm_exit) | |
3319 | ||
3320 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
3321 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |