Commit | Line | Data |
---|---|---|
6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * Yaniv Kamay <yaniv@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "kvm.h" | |
e495606d AK |
19 | #include "x86_emulate.h" |
20 | #include "segment_descriptor.h" | |
6aa8b732 AK |
21 | |
22 | #include <linux/kvm.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/errno.h> | |
6aa8b732 AK |
25 | #include <linux/percpu.h> |
26 | #include <linux/gfp.h> | |
6aa8b732 AK |
27 | #include <linux/mm.h> |
28 | #include <linux/miscdevice.h> | |
29 | #include <linux/vmalloc.h> | |
6aa8b732 | 30 | #include <linux/reboot.h> |
6aa8b732 AK |
31 | #include <linux/debugfs.h> |
32 | #include <linux/highmem.h> | |
33 | #include <linux/file.h> | |
59ae6c6b | 34 | #include <linux/sysdev.h> |
774c47f1 | 35 | #include <linux/cpu.h> |
e8edc6e0 | 36 | #include <linux/sched.h> |
d9e368d6 AK |
37 | #include <linux/cpumask.h> |
38 | #include <linux/smp.h> | |
d6d28168 | 39 | #include <linux/anon_inodes.h> |
6aa8b732 | 40 | |
e495606d AK |
41 | #include <asm/processor.h> |
42 | #include <asm/msr.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/desc.h> | |
6aa8b732 AK |
46 | |
47 | MODULE_AUTHOR("Qumranet"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
133de902 AK |
50 | static DEFINE_SPINLOCK(kvm_lock); |
51 | static LIST_HEAD(vm_list); | |
52 | ||
1b6c0168 AK |
53 | static cpumask_t cpus_hardware_enabled; |
54 | ||
6aa8b732 | 55 | struct kvm_arch_ops *kvm_arch_ops; |
1165f5fe | 56 | |
1b6c0168 AK |
57 | static void hardware_disable(void *ignored); |
58 | ||
1165f5fe | 59 | #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x) |
6aa8b732 AK |
60 | |
61 | static struct kvm_stats_debugfs_item { | |
62 | const char *name; | |
1165f5fe | 63 | int offset; |
6aa8b732 AK |
64 | struct dentry *dentry; |
65 | } debugfs_entries[] = { | |
1165f5fe AK |
66 | { "pf_fixed", STAT_OFFSET(pf_fixed) }, |
67 | { "pf_guest", STAT_OFFSET(pf_guest) }, | |
68 | { "tlb_flush", STAT_OFFSET(tlb_flush) }, | |
69 | { "invlpg", STAT_OFFSET(invlpg) }, | |
70 | { "exits", STAT_OFFSET(exits) }, | |
71 | { "io_exits", STAT_OFFSET(io_exits) }, | |
72 | { "mmio_exits", STAT_OFFSET(mmio_exits) }, | |
73 | { "signal_exits", STAT_OFFSET(signal_exits) }, | |
74 | { "irq_window", STAT_OFFSET(irq_window_exits) }, | |
75 | { "halt_exits", STAT_OFFSET(halt_exits) }, | |
76 | { "request_irq", STAT_OFFSET(request_irq_exits) }, | |
77 | { "irq_exits", STAT_OFFSET(irq_exits) }, | |
e6adf283 | 78 | { "light_exits", STAT_OFFSET(light_exits) }, |
2cc51560 | 79 | { "efer_reload", STAT_OFFSET(efer_reload) }, |
1165f5fe | 80 | { NULL } |
6aa8b732 AK |
81 | }; |
82 | ||
83 | static struct dentry *debugfs_dir; | |
84 | ||
85 | #define MAX_IO_MSRS 256 | |
86 | ||
87 | #define CR0_RESEVED_BITS 0xffffffff1ffaffc0ULL | |
88 | #define LMSW_GUEST_MASK 0x0eULL | |
89 | #define CR4_RESEVED_BITS (~((1ULL << 11) - 1)) | |
90 | #define CR8_RESEVED_BITS (~0x0fULL) | |
91 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe | |
92 | ||
05b3e0c2 | 93 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
94 | // LDT or TSS descriptor in the GDT. 16 bytes. |
95 | struct segment_descriptor_64 { | |
96 | struct segment_descriptor s; | |
97 | u32 base_higher; | |
98 | u32 pad_zero; | |
99 | }; | |
100 | ||
101 | #endif | |
102 | ||
bccf2150 AK |
103 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
104 | unsigned long arg); | |
105 | ||
6aa8b732 AK |
106 | unsigned long segment_base(u16 selector) |
107 | { | |
108 | struct descriptor_table gdt; | |
109 | struct segment_descriptor *d; | |
110 | unsigned long table_base; | |
111 | typedef unsigned long ul; | |
112 | unsigned long v; | |
113 | ||
114 | if (selector == 0) | |
115 | return 0; | |
116 | ||
117 | asm ("sgdt %0" : "=m"(gdt)); | |
118 | table_base = gdt.base; | |
119 | ||
120 | if (selector & 4) { /* from ldt */ | |
121 | u16 ldt_selector; | |
122 | ||
123 | asm ("sldt %0" : "=g"(ldt_selector)); | |
124 | table_base = segment_base(ldt_selector); | |
125 | } | |
126 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
127 | v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24); | |
05b3e0c2 | 128 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
129 | if (d->system == 0 |
130 | && (d->type == 2 || d->type == 9 || d->type == 11)) | |
131 | v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
132 | #endif | |
133 | return v; | |
134 | } | |
135 | EXPORT_SYMBOL_GPL(segment_base); | |
136 | ||
5aacf0ca JM |
137 | static inline int valid_vcpu(int n) |
138 | { | |
139 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
140 | } | |
141 | ||
d27d4aca AK |
142 | int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
143 | void *dest) | |
6aa8b732 AK |
144 | { |
145 | unsigned char *host_buf = dest; | |
146 | unsigned long req_size = size; | |
147 | ||
148 | while (size) { | |
149 | hpa_t paddr; | |
150 | unsigned now; | |
151 | unsigned offset; | |
152 | hva_t guest_buf; | |
153 | ||
154 | paddr = gva_to_hpa(vcpu, addr); | |
155 | ||
156 | if (is_error_hpa(paddr)) | |
157 | break; | |
158 | ||
159 | guest_buf = (hva_t)kmap_atomic( | |
160 | pfn_to_page(paddr >> PAGE_SHIFT), | |
161 | KM_USER0); | |
162 | offset = addr & ~PAGE_MASK; | |
163 | guest_buf |= offset; | |
164 | now = min(size, PAGE_SIZE - offset); | |
165 | memcpy(host_buf, (void*)guest_buf, now); | |
166 | host_buf += now; | |
167 | addr += now; | |
168 | size -= now; | |
169 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
170 | } | |
171 | return req_size - size; | |
172 | } | |
173 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
174 | ||
d27d4aca AK |
175 | int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
176 | void *data) | |
6aa8b732 AK |
177 | { |
178 | unsigned char *host_buf = data; | |
179 | unsigned long req_size = size; | |
180 | ||
181 | while (size) { | |
182 | hpa_t paddr; | |
183 | unsigned now; | |
184 | unsigned offset; | |
185 | hva_t guest_buf; | |
ab51a434 | 186 | gfn_t gfn; |
6aa8b732 AK |
187 | |
188 | paddr = gva_to_hpa(vcpu, addr); | |
189 | ||
190 | if (is_error_hpa(paddr)) | |
191 | break; | |
192 | ||
ab51a434 UL |
193 | gfn = vcpu->mmu.gva_to_gpa(vcpu, addr) >> PAGE_SHIFT; |
194 | mark_page_dirty(vcpu->kvm, gfn); | |
6aa8b732 AK |
195 | guest_buf = (hva_t)kmap_atomic( |
196 | pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0); | |
197 | offset = addr & ~PAGE_MASK; | |
198 | guest_buf |= offset; | |
199 | now = min(size, PAGE_SIZE - offset); | |
200 | memcpy((void*)guest_buf, host_buf, now); | |
201 | host_buf += now; | |
202 | addr += now; | |
203 | size -= now; | |
204 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
205 | } | |
206 | return req_size - size; | |
207 | } | |
208 | EXPORT_SYMBOL_GPL(kvm_write_guest); | |
209 | ||
7702fd1f AK |
210 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
211 | { | |
212 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
213 | return; | |
214 | ||
215 | vcpu->guest_fpu_loaded = 1; | |
216 | fx_save(vcpu->host_fx_image); | |
217 | fx_restore(vcpu->guest_fx_image); | |
218 | } | |
219 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
220 | ||
221 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
222 | { | |
223 | if (!vcpu->guest_fpu_loaded) | |
224 | return; | |
225 | ||
226 | vcpu->guest_fpu_loaded = 0; | |
227 | fx_save(vcpu->guest_fx_image); | |
228 | fx_restore(vcpu->host_fx_image); | |
229 | } | |
230 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
231 | ||
bccf2150 AK |
232 | /* |
233 | * Switches to specified vcpu, until a matching vcpu_put() | |
234 | */ | |
235 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 236 | { |
bccf2150 AK |
237 | mutex_lock(&vcpu->mutex); |
238 | kvm_arch_ops->vcpu_load(vcpu); | |
6aa8b732 AK |
239 | } |
240 | ||
6aa8b732 AK |
241 | static void vcpu_put(struct kvm_vcpu *vcpu) |
242 | { | |
243 | kvm_arch_ops->vcpu_put(vcpu); | |
6aa8b732 AK |
244 | mutex_unlock(&vcpu->mutex); |
245 | } | |
246 | ||
d9e368d6 AK |
247 | static void ack_flush(void *_completed) |
248 | { | |
249 | atomic_t *completed = _completed; | |
250 | ||
251 | atomic_inc(completed); | |
252 | } | |
253 | ||
254 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
255 | { | |
256 | int i, cpu, needed; | |
257 | cpumask_t cpus; | |
258 | struct kvm_vcpu *vcpu; | |
259 | atomic_t completed; | |
260 | ||
261 | atomic_set(&completed, 0); | |
262 | cpus_clear(cpus); | |
263 | needed = 0; | |
264 | for (i = 0; i < kvm->nvcpus; ++i) { | |
265 | vcpu = &kvm->vcpus[i]; | |
266 | if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests)) | |
267 | continue; | |
268 | cpu = vcpu->cpu; | |
269 | if (cpu != -1 && cpu != raw_smp_processor_id()) | |
270 | if (!cpu_isset(cpu, cpus)) { | |
271 | cpu_set(cpu, cpus); | |
272 | ++needed; | |
273 | } | |
274 | } | |
275 | ||
276 | /* | |
277 | * We really want smp_call_function_mask() here. But that's not | |
278 | * available, so ipi all cpus in parallel and wait for them | |
279 | * to complete. | |
280 | */ | |
281 | for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus)) | |
282 | smp_call_function_single(cpu, ack_flush, &completed, 1, 0); | |
283 | while (atomic_read(&completed) != needed) { | |
284 | cpu_relax(); | |
285 | barrier(); | |
286 | } | |
287 | } | |
288 | ||
f17abe9a | 289 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
290 | { |
291 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
292 | int i; | |
293 | ||
294 | if (!kvm) | |
f17abe9a | 295 | return ERR_PTR(-ENOMEM); |
6aa8b732 | 296 | |
74906345 | 297 | kvm_io_bus_init(&kvm->pio_bus); |
6aa8b732 AK |
298 | spin_lock_init(&kvm->lock); |
299 | INIT_LIST_HEAD(&kvm->active_mmu_pages); | |
2eeb2e94 | 300 | kvm_io_bus_init(&kvm->mmio_bus); |
6aa8b732 AK |
301 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
302 | struct kvm_vcpu *vcpu = &kvm->vcpus[i]; | |
303 | ||
304 | mutex_init(&vcpu->mutex); | |
133de902 | 305 | vcpu->cpu = -1; |
86a2b42e | 306 | vcpu->kvm = kvm; |
6aa8b732 | 307 | vcpu->mmu.root_hpa = INVALID_PAGE; |
6aa8b732 | 308 | } |
5e58cfe4 RR |
309 | spin_lock(&kvm_lock); |
310 | list_add(&kvm->vm_list, &vm_list); | |
311 | spin_unlock(&kvm_lock); | |
f17abe9a AK |
312 | return kvm; |
313 | } | |
314 | ||
315 | static int kvm_dev_open(struct inode *inode, struct file *filp) | |
316 | { | |
6aa8b732 AK |
317 | return 0; |
318 | } | |
319 | ||
320 | /* | |
321 | * Free any memory in @free but not in @dont. | |
322 | */ | |
323 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
324 | struct kvm_memory_slot *dont) | |
325 | { | |
326 | int i; | |
327 | ||
328 | if (!dont || free->phys_mem != dont->phys_mem) | |
329 | if (free->phys_mem) { | |
330 | for (i = 0; i < free->npages; ++i) | |
55a54f79 AK |
331 | if (free->phys_mem[i]) |
332 | __free_page(free->phys_mem[i]); | |
6aa8b732 AK |
333 | vfree(free->phys_mem); |
334 | } | |
335 | ||
336 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
337 | vfree(free->dirty_bitmap); | |
338 | ||
8b6d44c7 | 339 | free->phys_mem = NULL; |
6aa8b732 | 340 | free->npages = 0; |
8b6d44c7 | 341 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
342 | } |
343 | ||
344 | static void kvm_free_physmem(struct kvm *kvm) | |
345 | { | |
346 | int i; | |
347 | ||
348 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 349 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
350 | } |
351 | ||
039576c0 AK |
352 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
353 | { | |
354 | int i; | |
355 | ||
356 | for (i = 0; i < 2; ++i) | |
357 | if (vcpu->pio.guest_pages[i]) { | |
358 | __free_page(vcpu->pio.guest_pages[i]); | |
359 | vcpu->pio.guest_pages[i] = NULL; | |
360 | } | |
361 | } | |
362 | ||
7b53aa56 AK |
363 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
364 | { | |
365 | if (!vcpu->vmcs) | |
366 | return; | |
367 | ||
368 | vcpu_load(vcpu); | |
369 | kvm_mmu_unload(vcpu); | |
370 | vcpu_put(vcpu); | |
371 | } | |
372 | ||
6aa8b732 AK |
373 | static void kvm_free_vcpu(struct kvm_vcpu *vcpu) |
374 | { | |
bccf2150 | 375 | if (!vcpu->vmcs) |
1e8ba6fb IM |
376 | return; |
377 | ||
bccf2150 | 378 | vcpu_load(vcpu); |
6aa8b732 | 379 | kvm_mmu_destroy(vcpu); |
08438475 | 380 | vcpu_put(vcpu); |
9ede74e0 | 381 | kvm_arch_ops->vcpu_free(vcpu); |
9a2bb7f4 AK |
382 | free_page((unsigned long)vcpu->run); |
383 | vcpu->run = NULL; | |
039576c0 AK |
384 | free_page((unsigned long)vcpu->pio_data); |
385 | vcpu->pio_data = NULL; | |
386 | free_pio_guest_pages(vcpu); | |
6aa8b732 AK |
387 | } |
388 | ||
389 | static void kvm_free_vcpus(struct kvm *kvm) | |
390 | { | |
391 | unsigned int i; | |
392 | ||
7b53aa56 AK |
393 | /* |
394 | * Unpin any mmu pages first. | |
395 | */ | |
396 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
397 | kvm_unload_vcpu_mmu(&kvm->vcpus[i]); | |
6aa8b732 AK |
398 | for (i = 0; i < KVM_MAX_VCPUS; ++i) |
399 | kvm_free_vcpu(&kvm->vcpus[i]); | |
400 | } | |
401 | ||
402 | static int kvm_dev_release(struct inode *inode, struct file *filp) | |
403 | { | |
f17abe9a AK |
404 | return 0; |
405 | } | |
6aa8b732 | 406 | |
f17abe9a AK |
407 | static void kvm_destroy_vm(struct kvm *kvm) |
408 | { | |
133de902 AK |
409 | spin_lock(&kvm_lock); |
410 | list_del(&kvm->vm_list); | |
411 | spin_unlock(&kvm_lock); | |
74906345 | 412 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 413 | kvm_io_bus_destroy(&kvm->mmio_bus); |
6aa8b732 AK |
414 | kvm_free_vcpus(kvm); |
415 | kvm_free_physmem(kvm); | |
416 | kfree(kvm); | |
f17abe9a AK |
417 | } |
418 | ||
419 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
420 | { | |
421 | struct kvm *kvm = filp->private_data; | |
422 | ||
423 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
424 | return 0; |
425 | } | |
426 | ||
427 | static void inject_gp(struct kvm_vcpu *vcpu) | |
428 | { | |
429 | kvm_arch_ops->inject_gp(vcpu, 0); | |
430 | } | |
431 | ||
1342d353 AK |
432 | /* |
433 | * Load the pae pdptrs. Return true is they are all valid. | |
434 | */ | |
435 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
436 | { |
437 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 438 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 AK |
439 | int i; |
440 | u64 pdpte; | |
441 | u64 *pdpt; | |
1342d353 | 442 | int ret; |
954bbbc2 | 443 | struct page *page; |
6aa8b732 AK |
444 | |
445 | spin_lock(&vcpu->kvm->lock); | |
954bbbc2 AK |
446 | page = gfn_to_page(vcpu->kvm, pdpt_gfn); |
447 | /* FIXME: !page - emulate? 0xff? */ | |
448 | pdpt = kmap_atomic(page, KM_USER0); | |
6aa8b732 | 449 | |
1342d353 | 450 | ret = 1; |
6aa8b732 AK |
451 | for (i = 0; i < 4; ++i) { |
452 | pdpte = pdpt[offset + i]; | |
1342d353 AK |
453 | if ((pdpte & 1) && (pdpte & 0xfffffff0000001e6ull)) { |
454 | ret = 0; | |
455 | goto out; | |
456 | } | |
6aa8b732 AK |
457 | } |
458 | ||
1342d353 AK |
459 | for (i = 0; i < 4; ++i) |
460 | vcpu->pdptrs[i] = pdpt[offset + i]; | |
461 | ||
462 | out: | |
6aa8b732 AK |
463 | kunmap_atomic(pdpt, KM_USER0); |
464 | spin_unlock(&vcpu->kvm->lock); | |
465 | ||
1342d353 | 466 | return ret; |
6aa8b732 AK |
467 | } |
468 | ||
469 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
470 | { | |
471 | if (cr0 & CR0_RESEVED_BITS) { | |
472 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
473 | cr0, vcpu->cr0); | |
474 | inject_gp(vcpu); | |
475 | return; | |
476 | } | |
477 | ||
478 | if ((cr0 & CR0_NW_MASK) && !(cr0 & CR0_CD_MASK)) { | |
479 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
480 | inject_gp(vcpu); | |
481 | return; | |
482 | } | |
483 | ||
484 | if ((cr0 & CR0_PG_MASK) && !(cr0 & CR0_PE_MASK)) { | |
485 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
486 | "and a clear PE flag\n"); | |
487 | inject_gp(vcpu); | |
488 | return; | |
489 | } | |
490 | ||
491 | if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) { | |
05b3e0c2 | 492 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
493 | if ((vcpu->shadow_efer & EFER_LME)) { |
494 | int cs_db, cs_l; | |
495 | ||
496 | if (!is_pae(vcpu)) { | |
497 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
498 | "in long mode while PAE is disabled\n"); | |
499 | inject_gp(vcpu); | |
500 | return; | |
501 | } | |
502 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
503 | if (cs_l) { | |
504 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
505 | "in long mode while CS.L == 1\n"); | |
506 | inject_gp(vcpu); | |
507 | return; | |
508 | ||
509 | } | |
510 | } else | |
511 | #endif | |
1342d353 | 512 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
513 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
514 | "reserved bits\n"); | |
515 | inject_gp(vcpu); | |
516 | return; | |
517 | } | |
518 | ||
519 | } | |
520 | ||
521 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
522 | vcpu->cr0 = cr0; | |
523 | ||
524 | spin_lock(&vcpu->kvm->lock); | |
525 | kvm_mmu_reset_context(vcpu); | |
526 | spin_unlock(&vcpu->kvm->lock); | |
527 | return; | |
528 | } | |
529 | EXPORT_SYMBOL_GPL(set_cr0); | |
530 | ||
531 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
532 | { | |
533 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); | |
534 | } | |
535 | EXPORT_SYMBOL_GPL(lmsw); | |
536 | ||
537 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
538 | { | |
539 | if (cr4 & CR4_RESEVED_BITS) { | |
540 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
541 | inject_gp(vcpu); | |
542 | return; | |
543 | } | |
544 | ||
a9058ecd | 545 | if (is_long_mode(vcpu)) { |
6aa8b732 AK |
546 | if (!(cr4 & CR4_PAE_MASK)) { |
547 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
548 | "in long mode\n"); | |
549 | inject_gp(vcpu); | |
550 | return; | |
551 | } | |
552 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & CR4_PAE_MASK) | |
1342d353 | 553 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
554 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
555 | inject_gp(vcpu); | |
556 | } | |
557 | ||
558 | if (cr4 & CR4_VMXE_MASK) { | |
559 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
560 | inject_gp(vcpu); | |
561 | return; | |
562 | } | |
563 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
564 | spin_lock(&vcpu->kvm->lock); | |
565 | kvm_mmu_reset_context(vcpu); | |
566 | spin_unlock(&vcpu->kvm->lock); | |
567 | } | |
568 | EXPORT_SYMBOL_GPL(set_cr4); | |
569 | ||
570 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
571 | { | |
a9058ecd | 572 | if (is_long_mode(vcpu)) { |
d27d4aca | 573 | if (cr3 & CR3_L_MODE_RESEVED_BITS) { |
6aa8b732 AK |
574 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
575 | inject_gp(vcpu); | |
576 | return; | |
577 | } | |
578 | } else { | |
579 | if (cr3 & CR3_RESEVED_BITS) { | |
580 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
581 | inject_gp(vcpu); | |
582 | return; | |
583 | } | |
584 | if (is_paging(vcpu) && is_pae(vcpu) && | |
1342d353 | 585 | !load_pdptrs(vcpu, cr3)) { |
6aa8b732 AK |
586 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " |
587 | "reserved bits\n"); | |
588 | inject_gp(vcpu); | |
589 | return; | |
590 | } | |
591 | } | |
592 | ||
593 | vcpu->cr3 = cr3; | |
594 | spin_lock(&vcpu->kvm->lock); | |
d21225ee IM |
595 | /* |
596 | * Does the new cr3 value map to physical memory? (Note, we | |
597 | * catch an invalid cr3 even in real-mode, because it would | |
598 | * cause trouble later on when we turn on paging anyway.) | |
599 | * | |
600 | * A real CPU would silently accept an invalid cr3 and would | |
601 | * attempt to use it - with largely undefined (and often hard | |
602 | * to debug) behavior on the guest side. | |
603 | */ | |
604 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
605 | inject_gp(vcpu); | |
606 | else | |
607 | vcpu->mmu.new_cr3(vcpu); | |
6aa8b732 AK |
608 | spin_unlock(&vcpu->kvm->lock); |
609 | } | |
610 | EXPORT_SYMBOL_GPL(set_cr3); | |
611 | ||
612 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
613 | { | |
614 | if ( cr8 & CR8_RESEVED_BITS) { | |
615 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
616 | inject_gp(vcpu); | |
617 | return; | |
618 | } | |
619 | vcpu->cr8 = cr8; | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(set_cr8); | |
622 | ||
623 | void fx_init(struct kvm_vcpu *vcpu) | |
624 | { | |
625 | struct __attribute__ ((__packed__)) fx_image_s { | |
626 | u16 control; //fcw | |
627 | u16 status; //fsw | |
628 | u16 tag; // ftw | |
629 | u16 opcode; //fop | |
630 | u64 ip; // fpu ip | |
631 | u64 operand;// fpu dp | |
632 | u32 mxcsr; | |
633 | u32 mxcsr_mask; | |
634 | ||
635 | } *fx_image; | |
636 | ||
637 | fx_save(vcpu->host_fx_image); | |
638 | fpu_init(); | |
639 | fx_save(vcpu->guest_fx_image); | |
640 | fx_restore(vcpu->host_fx_image); | |
641 | ||
642 | fx_image = (struct fx_image_s *)vcpu->guest_fx_image; | |
643 | fx_image->mxcsr = 0x1f80; | |
644 | memset(vcpu->guest_fx_image + sizeof(struct fx_image_s), | |
645 | 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s)); | |
646 | } | |
647 | EXPORT_SYMBOL_GPL(fx_init); | |
648 | ||
6aa8b732 AK |
649 | /* |
650 | * Allocate some memory and give it an address in the guest physical address | |
651 | * space. | |
652 | * | |
653 | * Discontiguous memory is allowed, mostly for framebuffers. | |
654 | */ | |
2c6f5df9 AK |
655 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
656 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
657 | { |
658 | int r; | |
659 | gfn_t base_gfn; | |
660 | unsigned long npages; | |
661 | unsigned long i; | |
662 | struct kvm_memory_slot *memslot; | |
663 | struct kvm_memory_slot old, new; | |
664 | int memory_config_version; | |
665 | ||
666 | r = -EINVAL; | |
667 | /* General sanity checks */ | |
668 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
669 | goto out; | |
670 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
671 | goto out; | |
672 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
673 | goto out; | |
674 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
675 | goto out; | |
676 | ||
677 | memslot = &kvm->memslots[mem->slot]; | |
678 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
679 | npages = mem->memory_size >> PAGE_SHIFT; | |
680 | ||
681 | if (!npages) | |
682 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
683 | ||
684 | raced: | |
685 | spin_lock(&kvm->lock); | |
686 | ||
687 | memory_config_version = kvm->memory_config_version; | |
688 | new = old = *memslot; | |
689 | ||
690 | new.base_gfn = base_gfn; | |
691 | new.npages = npages; | |
692 | new.flags = mem->flags; | |
693 | ||
694 | /* Disallow changing a memory slot's size. */ | |
695 | r = -EINVAL; | |
696 | if (npages && old.npages && npages != old.npages) | |
697 | goto out_unlock; | |
698 | ||
699 | /* Check for overlaps */ | |
700 | r = -EEXIST; | |
701 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
702 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
703 | ||
704 | if (s == memslot) | |
705 | continue; | |
706 | if (!((base_gfn + npages <= s->base_gfn) || | |
707 | (base_gfn >= s->base_gfn + s->npages))) | |
708 | goto out_unlock; | |
709 | } | |
710 | /* | |
711 | * Do memory allocations outside lock. memory_config_version will | |
712 | * detect any races. | |
713 | */ | |
714 | spin_unlock(&kvm->lock); | |
715 | ||
716 | /* Deallocate if slot is being removed */ | |
717 | if (!npages) | |
8b6d44c7 | 718 | new.phys_mem = NULL; |
6aa8b732 AK |
719 | |
720 | /* Free page dirty bitmap if unneeded */ | |
721 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 722 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
723 | |
724 | r = -ENOMEM; | |
725 | ||
726 | /* Allocate if a slot is being created */ | |
727 | if (npages && !new.phys_mem) { | |
728 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
729 | ||
730 | if (!new.phys_mem) | |
731 | goto out_free; | |
732 | ||
733 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
734 | for (i = 0; i < npages; ++i) { | |
735 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
736 | | __GFP_ZERO); | |
737 | if (!new.phys_mem[i]) | |
738 | goto out_free; | |
5972e953 | 739 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
740 | } |
741 | } | |
742 | ||
743 | /* Allocate page dirty bitmap if needed */ | |
744 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
745 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
746 | ||
747 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
748 | if (!new.dirty_bitmap) | |
749 | goto out_free; | |
750 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
751 | } | |
752 | ||
753 | spin_lock(&kvm->lock); | |
754 | ||
755 | if (memory_config_version != kvm->memory_config_version) { | |
756 | spin_unlock(&kvm->lock); | |
757 | kvm_free_physmem_slot(&new, &old); | |
758 | goto raced; | |
759 | } | |
760 | ||
761 | r = -EAGAIN; | |
762 | if (kvm->busy) | |
763 | goto out_unlock; | |
764 | ||
765 | if (mem->slot >= kvm->nmemslots) | |
766 | kvm->nmemslots = mem->slot + 1; | |
767 | ||
768 | *memslot = new; | |
769 | ++kvm->memory_config_version; | |
770 | ||
90cb0529 AK |
771 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
772 | kvm_flush_remote_tlbs(kvm); | |
6aa8b732 | 773 | |
90cb0529 | 774 | spin_unlock(&kvm->lock); |
6aa8b732 AK |
775 | |
776 | kvm_free_physmem_slot(&old, &new); | |
777 | return 0; | |
778 | ||
779 | out_unlock: | |
780 | spin_unlock(&kvm->lock); | |
781 | out_free: | |
782 | kvm_free_physmem_slot(&new, &old); | |
783 | out: | |
784 | return r; | |
785 | } | |
786 | ||
787 | /* | |
788 | * Get (and clear) the dirty memory log for a memory slot. | |
789 | */ | |
2c6f5df9 AK |
790 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
791 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
792 | { |
793 | struct kvm_memory_slot *memslot; | |
794 | int r, i; | |
795 | int n; | |
796 | unsigned long any = 0; | |
797 | ||
798 | spin_lock(&kvm->lock); | |
799 | ||
800 | /* | |
801 | * Prevent changes to guest memory configuration even while the lock | |
802 | * is not taken. | |
803 | */ | |
804 | ++kvm->busy; | |
805 | spin_unlock(&kvm->lock); | |
806 | r = -EINVAL; | |
807 | if (log->slot >= KVM_MEMORY_SLOTS) | |
808 | goto out; | |
809 | ||
810 | memslot = &kvm->memslots[log->slot]; | |
811 | r = -ENOENT; | |
812 | if (!memslot->dirty_bitmap) | |
813 | goto out; | |
814 | ||
cd1a4a98 | 815 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 816 | |
cd1a4a98 | 817 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
818 | any = memslot->dirty_bitmap[i]; |
819 | ||
820 | r = -EFAULT; | |
821 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
822 | goto out; | |
823 | ||
90cb0529 AK |
824 | spin_lock(&kvm->lock); |
825 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
826 | kvm_flush_remote_tlbs(kvm); | |
827 | memset(memslot->dirty_bitmap, 0, n); | |
828 | spin_unlock(&kvm->lock); | |
6aa8b732 AK |
829 | |
830 | r = 0; | |
831 | ||
832 | out: | |
833 | spin_lock(&kvm->lock); | |
834 | --kvm->busy; | |
835 | spin_unlock(&kvm->lock); | |
836 | return r; | |
837 | } | |
838 | ||
e8207547 AK |
839 | /* |
840 | * Set a new alias region. Aliases map a portion of physical memory into | |
841 | * another portion. This is useful for memory windows, for example the PC | |
842 | * VGA region. | |
843 | */ | |
844 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
845 | struct kvm_memory_alias *alias) | |
846 | { | |
847 | int r, n; | |
848 | struct kvm_mem_alias *p; | |
849 | ||
850 | r = -EINVAL; | |
851 | /* General sanity checks */ | |
852 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
853 | goto out; | |
854 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
855 | goto out; | |
856 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
857 | goto out; | |
858 | if (alias->guest_phys_addr + alias->memory_size | |
859 | < alias->guest_phys_addr) | |
860 | goto out; | |
861 | if (alias->target_phys_addr + alias->memory_size | |
862 | < alias->target_phys_addr) | |
863 | goto out; | |
864 | ||
865 | spin_lock(&kvm->lock); | |
866 | ||
867 | p = &kvm->aliases[alias->slot]; | |
868 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
869 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
870 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
871 | ||
872 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
873 | if (kvm->aliases[n - 1].npages) | |
874 | break; | |
875 | kvm->naliases = n; | |
876 | ||
90cb0529 | 877 | kvm_mmu_zap_all(kvm); |
e8207547 | 878 | |
e8207547 | 879 | spin_unlock(&kvm->lock); |
e8207547 AK |
880 | |
881 | return 0; | |
882 | ||
883 | out: | |
884 | return r; | |
885 | } | |
886 | ||
887 | static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
888 | { | |
889 | int i; | |
890 | struct kvm_mem_alias *alias; | |
891 | ||
892 | for (i = 0; i < kvm->naliases; ++i) { | |
893 | alias = &kvm->aliases[i]; | |
894 | if (gfn >= alias->base_gfn | |
895 | && gfn < alias->base_gfn + alias->npages) | |
896 | return alias->target_gfn + gfn - alias->base_gfn; | |
897 | } | |
898 | return gfn; | |
899 | } | |
900 | ||
901 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
902 | { |
903 | int i; | |
904 | ||
905 | for (i = 0; i < kvm->nmemslots; ++i) { | |
906 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
907 | ||
908 | if (gfn >= memslot->base_gfn | |
909 | && gfn < memslot->base_gfn + memslot->npages) | |
910 | return memslot; | |
911 | } | |
8b6d44c7 | 912 | return NULL; |
6aa8b732 | 913 | } |
e8207547 AK |
914 | |
915 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
916 | { | |
917 | gfn = unalias_gfn(kvm, gfn); | |
918 | return __gfn_to_memslot(kvm, gfn); | |
919 | } | |
6aa8b732 | 920 | |
954bbbc2 AK |
921 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
922 | { | |
923 | struct kvm_memory_slot *slot; | |
924 | ||
e8207547 AK |
925 | gfn = unalias_gfn(kvm, gfn); |
926 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
927 | if (!slot) |
928 | return NULL; | |
929 | return slot->phys_mem[gfn - slot->base_gfn]; | |
930 | } | |
931 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
932 | ||
6aa8b732 AK |
933 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
934 | { | |
935 | int i; | |
31389947 | 936 | struct kvm_memory_slot *memslot; |
6aa8b732 AK |
937 | unsigned long rel_gfn; |
938 | ||
939 | for (i = 0; i < kvm->nmemslots; ++i) { | |
940 | memslot = &kvm->memslots[i]; | |
941 | ||
942 | if (gfn >= memslot->base_gfn | |
943 | && gfn < memslot->base_gfn + memslot->npages) { | |
944 | ||
31389947 | 945 | if (!memslot->dirty_bitmap) |
6aa8b732 AK |
946 | return; |
947 | ||
948 | rel_gfn = gfn - memslot->base_gfn; | |
949 | ||
950 | /* avoid RMW */ | |
951 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
952 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
953 | return; | |
954 | } | |
955 | } | |
956 | } | |
957 | ||
958 | static int emulator_read_std(unsigned long addr, | |
4c690a1e | 959 | void *val, |
6aa8b732 AK |
960 | unsigned int bytes, |
961 | struct x86_emulate_ctxt *ctxt) | |
962 | { | |
963 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
964 | void *data = val; | |
965 | ||
966 | while (bytes) { | |
967 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
968 | unsigned offset = addr & (PAGE_SIZE-1); | |
969 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
970 | unsigned long pfn; | |
954bbbc2 AK |
971 | struct page *page; |
972 | void *page_virt; | |
6aa8b732 AK |
973 | |
974 | if (gpa == UNMAPPED_GVA) | |
975 | return X86EMUL_PROPAGATE_FAULT; | |
976 | pfn = gpa >> PAGE_SHIFT; | |
954bbbc2 AK |
977 | page = gfn_to_page(vcpu->kvm, pfn); |
978 | if (!page) | |
6aa8b732 | 979 | return X86EMUL_UNHANDLEABLE; |
954bbbc2 | 980 | page_virt = kmap_atomic(page, KM_USER0); |
6aa8b732 | 981 | |
954bbbc2 | 982 | memcpy(data, page_virt + offset, tocopy); |
6aa8b732 | 983 | |
954bbbc2 | 984 | kunmap_atomic(page_virt, KM_USER0); |
6aa8b732 AK |
985 | |
986 | bytes -= tocopy; | |
987 | data += tocopy; | |
988 | addr += tocopy; | |
989 | } | |
990 | ||
991 | return X86EMUL_CONTINUE; | |
992 | } | |
993 | ||
994 | static int emulator_write_std(unsigned long addr, | |
4c690a1e | 995 | const void *val, |
6aa8b732 AK |
996 | unsigned int bytes, |
997 | struct x86_emulate_ctxt *ctxt) | |
998 | { | |
999 | printk(KERN_ERR "emulator_write_std: addr %lx n %d\n", | |
1000 | addr, bytes); | |
1001 | return X86EMUL_UNHANDLEABLE; | |
1002 | } | |
1003 | ||
2eeb2e94 GH |
1004 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
1005 | gpa_t addr) | |
1006 | { | |
1007 | /* | |
1008 | * Note that its important to have this wrapper function because | |
1009 | * in the very near future we will be checking for MMIOs against | |
1010 | * the LAPIC as well as the general MMIO bus | |
1011 | */ | |
1012 | return kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
1013 | } | |
1014 | ||
74906345 ED |
1015 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, |
1016 | gpa_t addr) | |
1017 | { | |
1018 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr); | |
1019 | } | |
1020 | ||
6aa8b732 | 1021 | static int emulator_read_emulated(unsigned long addr, |
4c690a1e | 1022 | void *val, |
6aa8b732 AK |
1023 | unsigned int bytes, |
1024 | struct x86_emulate_ctxt *ctxt) | |
1025 | { | |
2eeb2e94 GH |
1026 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
1027 | struct kvm_io_device *mmio_dev; | |
1028 | gpa_t gpa; | |
6aa8b732 AK |
1029 | |
1030 | if (vcpu->mmio_read_completed) { | |
1031 | memcpy(val, vcpu->mmio_data, bytes); | |
1032 | vcpu->mmio_read_completed = 0; | |
1033 | return X86EMUL_CONTINUE; | |
1034 | } else if (emulator_read_std(addr, val, bytes, ctxt) | |
1035 | == X86EMUL_CONTINUE) | |
1036 | return X86EMUL_CONTINUE; | |
d27d4aca | 1037 | |
2eeb2e94 GH |
1038 | gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); |
1039 | if (gpa == UNMAPPED_GVA) | |
1040 | return X86EMUL_PROPAGATE_FAULT; | |
6aa8b732 | 1041 | |
2eeb2e94 GH |
1042 | /* |
1043 | * Is this MMIO handled locally? | |
1044 | */ | |
1045 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1046 | if (mmio_dev) { | |
1047 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
1048 | return X86EMUL_CONTINUE; | |
6aa8b732 | 1049 | } |
2eeb2e94 GH |
1050 | |
1051 | vcpu->mmio_needed = 1; | |
1052 | vcpu->mmio_phys_addr = gpa; | |
1053 | vcpu->mmio_size = bytes; | |
1054 | vcpu->mmio_is_write = 0; | |
1055 | ||
1056 | return X86EMUL_UNHANDLEABLE; | |
6aa8b732 AK |
1057 | } |
1058 | ||
da4a00f0 | 1059 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
4c690a1e | 1060 | const void *val, int bytes) |
da4a00f0 | 1061 | { |
da4a00f0 AK |
1062 | struct page *page; |
1063 | void *virt; | |
09072daf | 1064 | unsigned offset = offset_in_page(gpa); |
da4a00f0 AK |
1065 | |
1066 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
1067 | return 0; | |
954bbbc2 AK |
1068 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
1069 | if (!page) | |
da4a00f0 | 1070 | return 0; |
ab51a434 | 1071 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 | 1072 | virt = kmap_atomic(page, KM_USER0); |
7cfa4b0a AK |
1073 | kvm_mmu_pte_write(vcpu, gpa, virt + offset, val, bytes); |
1074 | memcpy(virt + offset_in_page(gpa), val, bytes); | |
da4a00f0 | 1075 | kunmap_atomic(virt, KM_USER0); |
da4a00f0 AK |
1076 | return 1; |
1077 | } | |
1078 | ||
b0fcd903 AK |
1079 | static int emulator_write_emulated_onepage(unsigned long addr, |
1080 | const void *val, | |
1081 | unsigned int bytes, | |
1082 | struct x86_emulate_ctxt *ctxt) | |
6aa8b732 | 1083 | { |
2eeb2e94 GH |
1084 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
1085 | struct kvm_io_device *mmio_dev; | |
1086 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
6aa8b732 | 1087 | |
c9047f53 AK |
1088 | if (gpa == UNMAPPED_GVA) { |
1089 | kvm_arch_ops->inject_page_fault(vcpu, addr, 2); | |
6aa8b732 | 1090 | return X86EMUL_PROPAGATE_FAULT; |
c9047f53 | 1091 | } |
6aa8b732 | 1092 | |
da4a00f0 AK |
1093 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1094 | return X86EMUL_CONTINUE; | |
1095 | ||
2eeb2e94 GH |
1096 | /* |
1097 | * Is this MMIO handled locally? | |
1098 | */ | |
1099 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1100 | if (mmio_dev) { | |
1101 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
1102 | return X86EMUL_CONTINUE; | |
1103 | } | |
1104 | ||
6aa8b732 AK |
1105 | vcpu->mmio_needed = 1; |
1106 | vcpu->mmio_phys_addr = gpa; | |
1107 | vcpu->mmio_size = bytes; | |
1108 | vcpu->mmio_is_write = 1; | |
4c690a1e | 1109 | memcpy(vcpu->mmio_data, val, bytes); |
6aa8b732 AK |
1110 | |
1111 | return X86EMUL_CONTINUE; | |
1112 | } | |
1113 | ||
b0fcd903 AK |
1114 | static int emulator_write_emulated(unsigned long addr, |
1115 | const void *val, | |
1116 | unsigned int bytes, | |
1117 | struct x86_emulate_ctxt *ctxt) | |
1118 | { | |
1119 | /* Crossing a page boundary? */ | |
1120 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
1121 | int rc, now; | |
1122 | ||
1123 | now = -addr & ~PAGE_MASK; | |
1124 | rc = emulator_write_emulated_onepage(addr, val, now, ctxt); | |
1125 | if (rc != X86EMUL_CONTINUE) | |
1126 | return rc; | |
1127 | addr += now; | |
1128 | val += now; | |
1129 | bytes -= now; | |
1130 | } | |
1131 | return emulator_write_emulated_onepage(addr, val, bytes, ctxt); | |
1132 | } | |
1133 | ||
6aa8b732 | 1134 | static int emulator_cmpxchg_emulated(unsigned long addr, |
4c690a1e AK |
1135 | const void *old, |
1136 | const void *new, | |
6aa8b732 AK |
1137 | unsigned int bytes, |
1138 | struct x86_emulate_ctxt *ctxt) | |
1139 | { | |
1140 | static int reported; | |
1141 | ||
1142 | if (!reported) { | |
1143 | reported = 1; | |
1144 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1145 | } | |
1146 | return emulator_write_emulated(addr, new, bytes, ctxt); | |
1147 | } | |
1148 | ||
1149 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1150 | { | |
1151 | return kvm_arch_ops->get_segment_base(vcpu, seg); | |
1152 | } | |
1153 | ||
1154 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1155 | { | |
6aa8b732 AK |
1156 | return X86EMUL_CONTINUE; |
1157 | } | |
1158 | ||
1159 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1160 | { | |
399badf3 | 1161 | unsigned long cr0; |
6aa8b732 | 1162 | |
399badf3 | 1163 | cr0 = vcpu->cr0 & ~CR0_TS_MASK; |
6aa8b732 AK |
1164 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1165 | return X86EMUL_CONTINUE; | |
1166 | } | |
1167 | ||
1168 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1169 | { | |
1170 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1171 | ||
1172 | switch (dr) { | |
1173 | case 0 ... 3: | |
1174 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1175 | return X86EMUL_CONTINUE; | |
1176 | default: | |
1177 | printk(KERN_DEBUG "%s: unexpected dr %u\n", | |
1178 | __FUNCTION__, dr); | |
1179 | return X86EMUL_UNHANDLEABLE; | |
1180 | } | |
1181 | } | |
1182 | ||
1183 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1184 | { | |
1185 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1186 | int exception; | |
1187 | ||
1188 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1189 | if (exception) { | |
1190 | /* FIXME: better handling */ | |
1191 | return X86EMUL_UNHANDLEABLE; | |
1192 | } | |
1193 | return X86EMUL_CONTINUE; | |
1194 | } | |
1195 | ||
1196 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1197 | { | |
1198 | static int reported; | |
1199 | u8 opcodes[4]; | |
1200 | unsigned long rip = ctxt->vcpu->rip; | |
1201 | unsigned long rip_linear; | |
1202 | ||
1203 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1204 | ||
1205 | if (reported) | |
1206 | return; | |
1207 | ||
1208 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt); | |
1209 | ||
1210 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1211 | " rip %lx %02x %02x %02x %02x\n", | |
1212 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1213 | reported = 1; | |
1214 | } | |
1215 | ||
1216 | struct x86_emulate_ops emulate_ops = { | |
1217 | .read_std = emulator_read_std, | |
1218 | .write_std = emulator_write_std, | |
1219 | .read_emulated = emulator_read_emulated, | |
1220 | .write_emulated = emulator_write_emulated, | |
1221 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1222 | }; | |
1223 | ||
1224 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1225 | struct kvm_run *run, | |
1226 | unsigned long cr2, | |
1227 | u16 error_code) | |
1228 | { | |
1229 | struct x86_emulate_ctxt emulate_ctxt; | |
1230 | int r; | |
1231 | int cs_db, cs_l; | |
1232 | ||
e7df56e4 | 1233 | vcpu->mmio_fault_cr2 = cr2; |
6aa8b732 AK |
1234 | kvm_arch_ops->cache_regs(vcpu); |
1235 | ||
1236 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1237 | ||
1238 | emulate_ctxt.vcpu = vcpu; | |
1239 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1240 | emulate_ctxt.cr2 = cr2; | |
1241 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1242 | ? X86EMUL_MODE_REAL : cs_l | |
1243 | ? X86EMUL_MODE_PROT64 : cs_db | |
1244 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1245 | ||
1246 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1247 | emulate_ctxt.cs_base = 0; | |
1248 | emulate_ctxt.ds_base = 0; | |
1249 | emulate_ctxt.es_base = 0; | |
1250 | emulate_ctxt.ss_base = 0; | |
1251 | } else { | |
1252 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1253 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1254 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1255 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1256 | } | |
1257 | ||
1258 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1259 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1260 | ||
1261 | vcpu->mmio_is_write = 0; | |
1262 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); | |
1263 | ||
1264 | if ((r || vcpu->mmio_is_write) && run) { | |
1265 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
1266 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1267 | run->mmio.len = vcpu->mmio_size; | |
1268 | run->mmio.is_write = vcpu->mmio_is_write; | |
1269 | } | |
1270 | ||
1271 | if (r) { | |
a436036b AK |
1272 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1273 | return EMULATE_DONE; | |
6aa8b732 AK |
1274 | if (!vcpu->mmio_needed) { |
1275 | report_emulation_failure(&emulate_ctxt); | |
1276 | return EMULATE_FAIL; | |
1277 | } | |
1278 | return EMULATE_DO_MMIO; | |
1279 | } | |
1280 | ||
1281 | kvm_arch_ops->decache_regs(vcpu); | |
1282 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1283 | ||
02c83209 AK |
1284 | if (vcpu->mmio_is_write) { |
1285 | vcpu->mmio_needed = 0; | |
6aa8b732 | 1286 | return EMULATE_DO_MMIO; |
02c83209 | 1287 | } |
6aa8b732 AK |
1288 | |
1289 | return EMULATE_DONE; | |
1290 | } | |
1291 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1292 | ||
d3bef15f AK |
1293 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
1294 | { | |
1295 | if (vcpu->irq_summary) | |
1296 | return 1; | |
1297 | ||
1298 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
1299 | ++vcpu->stat.halt_exits; | |
1300 | return 0; | |
1301 | } | |
1302 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
1303 | ||
270fd9b9 AK |
1304 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1305 | { | |
1306 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1307 | ||
9b22bf57 | 1308 | kvm_arch_ops->cache_regs(vcpu); |
270fd9b9 AK |
1309 | ret = -KVM_EINVAL; |
1310 | #ifdef CONFIG_X86_64 | |
1311 | if (is_long_mode(vcpu)) { | |
1312 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1313 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1314 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1315 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1316 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1317 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1318 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1319 | } else | |
1320 | #endif | |
1321 | { | |
1322 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1323 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1324 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1325 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1326 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1327 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1328 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1329 | } | |
1330 | switch (nr) { | |
1331 | default: | |
b4e63f56 AK |
1332 | run->hypercall.args[0] = a0; |
1333 | run->hypercall.args[1] = a1; | |
1334 | run->hypercall.args[2] = a2; | |
1335 | run->hypercall.args[3] = a3; | |
1336 | run->hypercall.args[4] = a4; | |
1337 | run->hypercall.args[5] = a5; | |
1338 | run->hypercall.ret = ret; | |
1339 | run->hypercall.longmode = is_long_mode(vcpu); | |
1340 | kvm_arch_ops->decache_regs(vcpu); | |
1341 | return 0; | |
270fd9b9 AK |
1342 | } |
1343 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
9b22bf57 | 1344 | kvm_arch_ops->decache_regs(vcpu); |
270fd9b9 AK |
1345 | return 1; |
1346 | } | |
1347 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1348 | ||
6aa8b732 AK |
1349 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1350 | { | |
1351 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1352 | } | |
1353 | ||
1354 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1355 | { | |
1356 | struct descriptor_table dt = { limit, base }; | |
1357 | ||
1358 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1359 | } | |
1360 | ||
1361 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1362 | { | |
1363 | struct descriptor_table dt = { limit, base }; | |
1364 | ||
1365 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1366 | } | |
1367 | ||
1368 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1369 | unsigned long *rflags) | |
1370 | { | |
1371 | lmsw(vcpu, msw); | |
1372 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1373 | } | |
1374 | ||
1375 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1376 | { | |
25c4c276 | 1377 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1378 | switch (cr) { |
1379 | case 0: | |
1380 | return vcpu->cr0; | |
1381 | case 2: | |
1382 | return vcpu->cr2; | |
1383 | case 3: | |
1384 | return vcpu->cr3; | |
1385 | case 4: | |
1386 | return vcpu->cr4; | |
1387 | default: | |
1388 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1389 | return 0; | |
1390 | } | |
1391 | } | |
1392 | ||
1393 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1394 | unsigned long *rflags) | |
1395 | { | |
1396 | switch (cr) { | |
1397 | case 0: | |
1398 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1399 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1400 | break; | |
1401 | case 2: | |
1402 | vcpu->cr2 = val; | |
1403 | break; | |
1404 | case 3: | |
1405 | set_cr3(vcpu, val); | |
1406 | break; | |
1407 | case 4: | |
1408 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1409 | break; | |
1410 | default: | |
1411 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1412 | } | |
1413 | } | |
1414 | ||
102d8325 IM |
1415 | /* |
1416 | * Register the para guest with the host: | |
1417 | */ | |
1418 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1419 | { | |
1420 | struct kvm_vcpu_para_state *para_state; | |
1421 | hpa_t para_state_hpa, hypercall_hpa; | |
1422 | struct page *para_state_page; | |
1423 | unsigned char *hypercall; | |
1424 | gpa_t hypercall_gpa; | |
1425 | ||
1426 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1427 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1428 | ||
1429 | /* | |
1430 | * Needs to be page aligned: | |
1431 | */ | |
1432 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1433 | goto err_gp; | |
1434 | ||
1435 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1436 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1437 | if (is_error_hpa(para_state_hpa)) | |
1438 | goto err_gp; | |
1439 | ||
ab51a434 | 1440 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 IM |
1441 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
1442 | para_state = kmap_atomic(para_state_page, KM_USER0); | |
1443 | ||
1444 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1445 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1446 | ||
1447 | para_state->host_version = KVM_PARA_API_VERSION; | |
1448 | /* | |
1449 | * We cannot support guests that try to register themselves | |
1450 | * with a newer API version than the host supports: | |
1451 | */ | |
1452 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1453 | para_state->ret = -KVM_EINVAL; | |
1454 | goto err_kunmap_skip; | |
1455 | } | |
1456 | ||
1457 | hypercall_gpa = para_state->hypercall_gpa; | |
1458 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1459 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1460 | if (is_error_hpa(hypercall_hpa)) { | |
1461 | para_state->ret = -KVM_EINVAL; | |
1462 | goto err_kunmap_skip; | |
1463 | } | |
1464 | ||
1465 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1466 | vcpu->para_state_page = para_state_page; | |
1467 | vcpu->para_state_gpa = para_state_gpa; | |
1468 | vcpu->hypercall_gpa = hypercall_gpa; | |
1469 | ||
ab51a434 | 1470 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1471 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1472 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1473 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1474 | kunmap_atomic(hypercall, KM_USER1); | |
1475 | ||
1476 | para_state->ret = 0; | |
1477 | err_kunmap_skip: | |
1478 | kunmap_atomic(para_state, KM_USER0); | |
1479 | return 0; | |
1480 | err_gp: | |
1481 | return 1; | |
1482 | } | |
1483 | ||
3bab1f5d AK |
1484 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1485 | { | |
1486 | u64 data; | |
1487 | ||
1488 | switch (msr) { | |
1489 | case 0xc0010010: /* SYSCFG */ | |
1490 | case 0xc0010015: /* HWCR */ | |
1491 | case MSR_IA32_PLATFORM_ID: | |
1492 | case MSR_IA32_P5_MC_ADDR: | |
1493 | case MSR_IA32_P5_MC_TYPE: | |
1494 | case MSR_IA32_MC0_CTL: | |
1495 | case MSR_IA32_MCG_STATUS: | |
1496 | case MSR_IA32_MCG_CAP: | |
1497 | case MSR_IA32_MC0_MISC: | |
1498 | case MSR_IA32_MC0_MISC+4: | |
1499 | case MSR_IA32_MC0_MISC+8: | |
1500 | case MSR_IA32_MC0_MISC+12: | |
1501 | case MSR_IA32_MC0_MISC+16: | |
1502 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1503 | case MSR_IA32_PERF_STATUS: |
2dc7094b | 1504 | case MSR_IA32_EBL_CR_POWERON: |
3bab1f5d AK |
1505 | /* MTRR registers */ |
1506 | case 0xfe: | |
1507 | case 0x200 ... 0x2ff: | |
1508 | data = 0; | |
1509 | break; | |
a8d13ea2 AK |
1510 | case 0xcd: /* fsb frequency */ |
1511 | data = 3; | |
1512 | break; | |
3bab1f5d AK |
1513 | case MSR_IA32_APICBASE: |
1514 | data = vcpu->apic_base; | |
1515 | break; | |
6f00e68f AK |
1516 | case MSR_IA32_MISC_ENABLE: |
1517 | data = vcpu->ia32_misc_enable_msr; | |
1518 | break; | |
3bab1f5d AK |
1519 | #ifdef CONFIG_X86_64 |
1520 | case MSR_EFER: | |
1521 | data = vcpu->shadow_efer; | |
1522 | break; | |
1523 | #endif | |
1524 | default: | |
1525 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr); | |
1526 | return 1; | |
1527 | } | |
1528 | *pdata = data; | |
1529 | return 0; | |
1530 | } | |
1531 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1532 | ||
6aa8b732 AK |
1533 | /* |
1534 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1535 | * Returns 0 on success, non-0 otherwise. | |
1536 | * Assumes vcpu_load() was already called. | |
1537 | */ | |
35f3f286 | 1538 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
6aa8b732 AK |
1539 | { |
1540 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1541 | } | |
1542 | ||
05b3e0c2 | 1543 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1544 | |
3bab1f5d | 1545 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1546 | { |
6aa8b732 AK |
1547 | if (efer & EFER_RESERVED_BITS) { |
1548 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1549 | efer); | |
1550 | inject_gp(vcpu); | |
1551 | return; | |
1552 | } | |
1553 | ||
1554 | if (is_paging(vcpu) | |
1555 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1556 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1557 | inject_gp(vcpu); | |
1558 | return; | |
1559 | } | |
1560 | ||
7725f0ba AK |
1561 | kvm_arch_ops->set_efer(vcpu, efer); |
1562 | ||
6aa8b732 AK |
1563 | efer &= ~EFER_LMA; |
1564 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1565 | ||
1566 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1567 | } |
6aa8b732 AK |
1568 | |
1569 | #endif | |
1570 | ||
3bab1f5d AK |
1571 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1572 | { | |
1573 | switch (msr) { | |
1574 | #ifdef CONFIG_X86_64 | |
1575 | case MSR_EFER: | |
1576 | set_efer(vcpu, data); | |
1577 | break; | |
1578 | #endif | |
1579 | case MSR_IA32_MC0_STATUS: | |
1580 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
1581 | __FUNCTION__, data); | |
1582 | break; | |
0e5bf0d0 SK |
1583 | case MSR_IA32_MCG_STATUS: |
1584 | printk(KERN_WARNING "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
1585 | __FUNCTION__, data); | |
1586 | break; | |
3bab1f5d AK |
1587 | case MSR_IA32_UCODE_REV: |
1588 | case MSR_IA32_UCODE_WRITE: | |
1589 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1590 | break; | |
1591 | case MSR_IA32_APICBASE: | |
1592 | vcpu->apic_base = data; | |
1593 | break; | |
6f00e68f AK |
1594 | case MSR_IA32_MISC_ENABLE: |
1595 | vcpu->ia32_misc_enable_msr = data; | |
1596 | break; | |
102d8325 IM |
1597 | /* |
1598 | * This is the 'probe whether the host is KVM' logic: | |
1599 | */ | |
1600 | case MSR_KVM_API_MAGIC: | |
1601 | return vcpu_register_para(vcpu, data); | |
1602 | ||
3bab1f5d AK |
1603 | default: |
1604 | printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr); | |
1605 | return 1; | |
1606 | } | |
1607 | return 0; | |
1608 | } | |
1609 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1610 | ||
6aa8b732 AK |
1611 | /* |
1612 | * Writes msr value into into the appropriate "register". | |
1613 | * Returns 0 on success, non-0 otherwise. | |
1614 | * Assumes vcpu_load() was already called. | |
1615 | */ | |
35f3f286 | 1616 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
6aa8b732 AK |
1617 | { |
1618 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1619 | } | |
1620 | ||
1621 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1622 | { | |
3fca0365 YD |
1623 | if (!need_resched()) |
1624 | return; | |
6aa8b732 AK |
1625 | vcpu_put(vcpu); |
1626 | cond_resched(); | |
bccf2150 | 1627 | vcpu_load(vcpu); |
6aa8b732 AK |
1628 | } |
1629 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1630 | ||
1631 | void load_msrs(struct vmx_msr_entry *e, int n) | |
1632 | { | |
1633 | int i; | |
1634 | ||
1635 | for (i = 0; i < n; ++i) | |
1636 | wrmsrl(e[i].index, e[i].data); | |
1637 | } | |
1638 | EXPORT_SYMBOL_GPL(load_msrs); | |
1639 | ||
1640 | void save_msrs(struct vmx_msr_entry *e, int n) | |
1641 | { | |
1642 | int i; | |
1643 | ||
1644 | for (i = 0; i < n; ++i) | |
1645 | rdmsrl(e[i].index, e[i].data); | |
1646 | } | |
1647 | EXPORT_SYMBOL_GPL(save_msrs); | |
1648 | ||
06465c5a AK |
1649 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1650 | { | |
1651 | int i; | |
1652 | u32 function; | |
1653 | struct kvm_cpuid_entry *e, *best; | |
1654 | ||
1655 | kvm_arch_ops->cache_regs(vcpu); | |
1656 | function = vcpu->regs[VCPU_REGS_RAX]; | |
1657 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1658 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1659 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1660 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1661 | best = NULL; | |
1662 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1663 | e = &vcpu->cpuid_entries[i]; | |
1664 | if (e->function == function) { | |
1665 | best = e; | |
1666 | break; | |
1667 | } | |
1668 | /* | |
1669 | * Both basic or both extended? | |
1670 | */ | |
1671 | if (((e->function ^ function) & 0x80000000) == 0) | |
1672 | if (!best || e->function > best->function) | |
1673 | best = e; | |
1674 | } | |
1675 | if (best) { | |
1676 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1677 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1678 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1679 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1680 | } | |
1681 | kvm_arch_ops->decache_regs(vcpu); | |
1682 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1683 | } | |
1684 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1685 | ||
039576c0 | 1686 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1687 | { |
039576c0 AK |
1688 | void *p = vcpu->pio_data; |
1689 | void *q; | |
1690 | unsigned bytes; | |
1691 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1692 | ||
1693 | kvm_arch_ops->vcpu_put(vcpu); | |
1694 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, | |
1695 | PAGE_KERNEL); | |
1696 | if (!q) { | |
1697 | kvm_arch_ops->vcpu_load(vcpu); | |
1698 | free_pio_guest_pages(vcpu); | |
1699 | return -ENOMEM; | |
1700 | } | |
1701 | q += vcpu->pio.guest_page_offset; | |
1702 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1703 | if (vcpu->pio.in) | |
1704 | memcpy(q, p, bytes); | |
1705 | else | |
1706 | memcpy(p, q, bytes); | |
1707 | q -= vcpu->pio.guest_page_offset; | |
1708 | vunmap(q); | |
1709 | kvm_arch_ops->vcpu_load(vcpu); | |
1710 | free_pio_guest_pages(vcpu); | |
1711 | return 0; | |
1712 | } | |
1713 | ||
1714 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1715 | { | |
1716 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1717 | long delta; |
039576c0 | 1718 | int r; |
46fc1477 AK |
1719 | |
1720 | kvm_arch_ops->cache_regs(vcpu); | |
1721 | ||
1722 | if (!io->string) { | |
039576c0 AK |
1723 | if (io->in) |
1724 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1725 | io->size); |
1726 | } else { | |
039576c0 AK |
1727 | if (io->in) { |
1728 | r = pio_copy_data(vcpu); | |
1729 | if (r) { | |
1730 | kvm_arch_ops->cache_regs(vcpu); | |
1731 | return r; | |
1732 | } | |
1733 | } | |
1734 | ||
46fc1477 AK |
1735 | delta = 1; |
1736 | if (io->rep) { | |
039576c0 | 1737 | delta *= io->cur_count; |
46fc1477 AK |
1738 | /* |
1739 | * The size of the register should really depend on | |
1740 | * current address size. | |
1741 | */ | |
1742 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1743 | } | |
039576c0 | 1744 | if (io->down) |
46fc1477 AK |
1745 | delta = -delta; |
1746 | delta *= io->size; | |
039576c0 | 1747 | if (io->in) |
46fc1477 AK |
1748 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1749 | else | |
1750 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1751 | } | |
1752 | ||
46fc1477 AK |
1753 | kvm_arch_ops->decache_regs(vcpu); |
1754 | ||
039576c0 AK |
1755 | io->count -= io->cur_count; |
1756 | io->cur_count = 0; | |
1757 | ||
1758 | if (!io->count) | |
1759 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1760 | return 0; | |
46fc1477 AK |
1761 | } |
1762 | ||
74906345 ED |
1763 | void kernel_pio(struct kvm_io_device *pio_dev, struct kvm_vcpu *vcpu) |
1764 | { | |
1765 | /* TODO: String I/O for in kernel device */ | |
1766 | ||
1767 | if (vcpu->pio.in) | |
1768 | kvm_iodevice_read(pio_dev, vcpu->pio.port, | |
1769 | vcpu->pio.size, | |
1770 | vcpu->pio_data); | |
1771 | else | |
1772 | kvm_iodevice_write(pio_dev, vcpu->pio.port, | |
1773 | vcpu->pio.size, | |
1774 | vcpu->pio_data); | |
1775 | } | |
1776 | ||
039576c0 AK |
1777 | int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
1778 | int size, unsigned long count, int string, int down, | |
1779 | gva_t address, int rep, unsigned port) | |
1780 | { | |
1781 | unsigned now, in_page; | |
1782 | int i; | |
1783 | int nr_pages = 1; | |
1784 | struct page *page; | |
74906345 | 1785 | struct kvm_io_device *pio_dev; |
039576c0 AK |
1786 | |
1787 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1788 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1789 | vcpu->run->io.size = size; | |
1790 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1791 | vcpu->run->io.count = count; | |
1792 | vcpu->run->io.port = port; | |
1793 | vcpu->pio.count = count; | |
1794 | vcpu->pio.cur_count = count; | |
1795 | vcpu->pio.size = size; | |
1796 | vcpu->pio.in = in; | |
74906345 | 1797 | vcpu->pio.port = port; |
039576c0 AK |
1798 | vcpu->pio.string = string; |
1799 | vcpu->pio.down = down; | |
1800 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
1801 | vcpu->pio.rep = rep; | |
1802 | ||
74906345 | 1803 | pio_dev = vcpu_find_pio_dev(vcpu, port); |
039576c0 AK |
1804 | if (!string) { |
1805 | kvm_arch_ops->cache_regs(vcpu); | |
1806 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); | |
1807 | kvm_arch_ops->decache_regs(vcpu); | |
74906345 ED |
1808 | if (pio_dev) { |
1809 | kernel_pio(pio_dev, vcpu); | |
1810 | complete_pio(vcpu); | |
1811 | return 1; | |
1812 | } | |
039576c0 AK |
1813 | return 0; |
1814 | } | |
74906345 ED |
1815 | /* TODO: String I/O for in kernel device */ |
1816 | if (pio_dev) | |
1817 | printk(KERN_ERR "kvm_setup_pio: no string io support\n"); | |
039576c0 AK |
1818 | |
1819 | if (!count) { | |
1820 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1821 | return 1; | |
1822 | } | |
1823 | ||
1824 | now = min(count, PAGE_SIZE / size); | |
1825 | ||
1826 | if (!down) | |
1827 | in_page = PAGE_SIZE - offset_in_page(address); | |
1828 | else | |
1829 | in_page = offset_in_page(address) + size; | |
1830 | now = min(count, (unsigned long)in_page / size); | |
1831 | if (!now) { | |
1832 | /* | |
1833 | * String I/O straddles page boundary. Pin two guest pages | |
1834 | * so that we satisfy atomicity constraints. Do just one | |
1835 | * transaction to avoid complexity. | |
1836 | */ | |
1837 | nr_pages = 2; | |
1838 | now = 1; | |
1839 | } | |
1840 | if (down) { | |
1841 | /* | |
1842 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
1843 | */ | |
1844 | printk(KERN_ERR "kvm: guest string pio down\n"); | |
1845 | inject_gp(vcpu); | |
1846 | return 1; | |
1847 | } | |
1848 | vcpu->run->io.count = now; | |
1849 | vcpu->pio.cur_count = now; | |
1850 | ||
1851 | for (i = 0; i < nr_pages; ++i) { | |
1852 | spin_lock(&vcpu->kvm->lock); | |
1853 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); | |
1854 | if (page) | |
1855 | get_page(page); | |
1856 | vcpu->pio.guest_pages[i] = page; | |
1857 | spin_unlock(&vcpu->kvm->lock); | |
1858 | if (!page) { | |
1859 | inject_gp(vcpu); | |
1860 | free_pio_guest_pages(vcpu); | |
1861 | return 1; | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | if (!vcpu->pio.in) | |
1866 | return pio_copy_data(vcpu); | |
1867 | return 0; | |
1868 | } | |
1869 | EXPORT_SYMBOL_GPL(kvm_setup_pio); | |
1870 | ||
bccf2150 | 1871 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1872 | { |
6aa8b732 | 1873 | int r; |
1961d276 | 1874 | sigset_t sigsaved; |
6aa8b732 | 1875 | |
bccf2150 | 1876 | vcpu_load(vcpu); |
6aa8b732 | 1877 | |
1961d276 AK |
1878 | if (vcpu->sigset_active) |
1879 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1880 | ||
54810342 DL |
1881 | /* re-sync apic's tpr */ |
1882 | vcpu->cr8 = kvm_run->cr8; | |
1883 | ||
02c83209 AK |
1884 | if (vcpu->pio.cur_count) { |
1885 | r = complete_pio(vcpu); | |
1886 | if (r) | |
1887 | goto out; | |
1888 | } | |
1889 | ||
1890 | if (vcpu->mmio_needed) { | |
1891 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
1892 | vcpu->mmio_read_completed = 1; | |
1893 | vcpu->mmio_needed = 0; | |
1894 | r = emulate_instruction(vcpu, kvm_run, | |
1895 | vcpu->mmio_fault_cr2, 0); | |
1896 | if (r == EMULATE_DO_MMIO) { | |
1897 | /* | |
1898 | * Read-modify-write. Back to userspace. | |
1899 | */ | |
1900 | kvm_run->exit_reason = KVM_EXIT_MMIO; | |
1901 | r = 0; | |
1902 | goto out; | |
46fc1477 | 1903 | } |
6aa8b732 AK |
1904 | } |
1905 | ||
8eb7d334 | 1906 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
b4e63f56 AK |
1907 | kvm_arch_ops->cache_regs(vcpu); |
1908 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; | |
1909 | kvm_arch_ops->decache_regs(vcpu); | |
1910 | } | |
1911 | ||
6aa8b732 AK |
1912 | r = kvm_arch_ops->run(vcpu, kvm_run); |
1913 | ||
039576c0 | 1914 | out: |
1961d276 AK |
1915 | if (vcpu->sigset_active) |
1916 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1917 | ||
6aa8b732 AK |
1918 | vcpu_put(vcpu); |
1919 | return r; | |
1920 | } | |
1921 | ||
bccf2150 AK |
1922 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
1923 | struct kvm_regs *regs) | |
6aa8b732 | 1924 | { |
bccf2150 | 1925 | vcpu_load(vcpu); |
6aa8b732 AK |
1926 | |
1927 | kvm_arch_ops->cache_regs(vcpu); | |
1928 | ||
1929 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
1930 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
1931 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
1932 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
1933 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
1934 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
1935 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
1936 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 1937 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1938 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
1939 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
1940 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
1941 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
1942 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
1943 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
1944 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
1945 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
1946 | #endif | |
1947 | ||
1948 | regs->rip = vcpu->rip; | |
1949 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
1950 | ||
1951 | /* | |
1952 | * Don't leak debug flags in case they were set for guest debugging | |
1953 | */ | |
1954 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
1955 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
1956 | ||
1957 | vcpu_put(vcpu); | |
1958 | ||
1959 | return 0; | |
1960 | } | |
1961 | ||
bccf2150 AK |
1962 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
1963 | struct kvm_regs *regs) | |
6aa8b732 | 1964 | { |
bccf2150 | 1965 | vcpu_load(vcpu); |
6aa8b732 AK |
1966 | |
1967 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
1968 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
1969 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
1970 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
1971 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
1972 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
1973 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
1974 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 1975 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
1976 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
1977 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
1978 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
1979 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
1980 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
1981 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
1982 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
1983 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
1984 | #endif | |
1985 | ||
1986 | vcpu->rip = regs->rip; | |
1987 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
1988 | ||
1989 | kvm_arch_ops->decache_regs(vcpu); | |
1990 | ||
1991 | vcpu_put(vcpu); | |
1992 | ||
1993 | return 0; | |
1994 | } | |
1995 | ||
1996 | static void get_segment(struct kvm_vcpu *vcpu, | |
1997 | struct kvm_segment *var, int seg) | |
1998 | { | |
1999 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
2000 | } | |
2001 | ||
bccf2150 AK |
2002 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
2003 | struct kvm_sregs *sregs) | |
6aa8b732 | 2004 | { |
6aa8b732 AK |
2005 | struct descriptor_table dt; |
2006 | ||
bccf2150 | 2007 | vcpu_load(vcpu); |
6aa8b732 AK |
2008 | |
2009 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2010 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2011 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2012 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2013 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2014 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2015 | ||
2016 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2017 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2018 | ||
2019 | kvm_arch_ops->get_idt(vcpu, &dt); | |
2020 | sregs->idt.limit = dt.limit; | |
2021 | sregs->idt.base = dt.base; | |
2022 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
2023 | sregs->gdt.limit = dt.limit; | |
2024 | sregs->gdt.base = dt.base; | |
2025 | ||
25c4c276 | 2026 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
2027 | sregs->cr0 = vcpu->cr0; |
2028 | sregs->cr2 = vcpu->cr2; | |
2029 | sregs->cr3 = vcpu->cr3; | |
2030 | sregs->cr4 = vcpu->cr4; | |
2031 | sregs->cr8 = vcpu->cr8; | |
2032 | sregs->efer = vcpu->shadow_efer; | |
2033 | sregs->apic_base = vcpu->apic_base; | |
2034 | ||
2035 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
2036 | sizeof sregs->interrupt_bitmap); | |
2037 | ||
2038 | vcpu_put(vcpu); | |
2039 | ||
2040 | return 0; | |
2041 | } | |
2042 | ||
2043 | static void set_segment(struct kvm_vcpu *vcpu, | |
2044 | struct kvm_segment *var, int seg) | |
2045 | { | |
2046 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
2047 | } | |
2048 | ||
bccf2150 AK |
2049 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
2050 | struct kvm_sregs *sregs) | |
6aa8b732 | 2051 | { |
6aa8b732 AK |
2052 | int mmu_reset_needed = 0; |
2053 | int i; | |
2054 | struct descriptor_table dt; | |
2055 | ||
bccf2150 | 2056 | vcpu_load(vcpu); |
6aa8b732 | 2057 | |
6aa8b732 AK |
2058 | dt.limit = sregs->idt.limit; |
2059 | dt.base = sregs->idt.base; | |
2060 | kvm_arch_ops->set_idt(vcpu, &dt); | |
2061 | dt.limit = sregs->gdt.limit; | |
2062 | dt.base = sregs->gdt.base; | |
2063 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
2064 | ||
2065 | vcpu->cr2 = sregs->cr2; | |
2066 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2067 | vcpu->cr3 = sregs->cr3; | |
2068 | ||
2069 | vcpu->cr8 = sregs->cr8; | |
2070 | ||
2071 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2072 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2073 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
2074 | #endif | |
2075 | vcpu->apic_base = sregs->apic_base; | |
2076 | ||
25c4c276 | 2077 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
399badf3 | 2078 | |
6aa8b732 | 2079 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
f6528b03 | 2080 | kvm_arch_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2081 | |
2082 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
2083 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
2084 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2085 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2086 | |
2087 | if (mmu_reset_needed) | |
2088 | kvm_mmu_reset_context(vcpu); | |
2089 | ||
2090 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2091 | sizeof vcpu->irq_pending); | |
2092 | vcpu->irq_summary = 0; | |
2093 | for (i = 0; i < NR_IRQ_WORDS; ++i) | |
2094 | if (vcpu->irq_pending[i]) | |
2095 | __set_bit(i, &vcpu->irq_summary); | |
2096 | ||
024aa1c0 AK |
2097 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2098 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2099 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2100 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2101 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2102 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2103 | ||
2104 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2105 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2106 | ||
6aa8b732 AK |
2107 | vcpu_put(vcpu); |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2114 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2115 | * |
2116 | * This list is modified at module load time to reflect the | |
2117 | * capabilities of the host cpu. | |
6aa8b732 AK |
2118 | */ |
2119 | static u32 msrs_to_save[] = { | |
2120 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2121 | MSR_K6_STAR, | |
05b3e0c2 | 2122 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2123 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2124 | #endif | |
2125 | MSR_IA32_TIME_STAMP_COUNTER, | |
2126 | }; | |
2127 | ||
bf591b24 MR |
2128 | static unsigned num_msrs_to_save; |
2129 | ||
6f00e68f AK |
2130 | static u32 emulated_msrs[] = { |
2131 | MSR_IA32_MISC_ENABLE, | |
2132 | }; | |
2133 | ||
bf591b24 MR |
2134 | static __init void kvm_init_msr_list(void) |
2135 | { | |
2136 | u32 dummy[2]; | |
2137 | unsigned i, j; | |
2138 | ||
2139 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2140 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2141 | continue; | |
2142 | if (j < i) | |
2143 | msrs_to_save[j] = msrs_to_save[i]; | |
2144 | j++; | |
2145 | } | |
2146 | num_msrs_to_save = j; | |
2147 | } | |
6aa8b732 AK |
2148 | |
2149 | /* | |
2150 | * Adapt set_msr() to msr_io()'s calling convention | |
2151 | */ | |
2152 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2153 | { | |
35f3f286 | 2154 | return kvm_set_msr(vcpu, index, *data); |
6aa8b732 AK |
2155 | } |
2156 | ||
2157 | /* | |
2158 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2159 | * | |
2160 | * @return number of msrs set successfully. | |
2161 | */ | |
bccf2150 | 2162 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2163 | struct kvm_msr_entry *entries, |
2164 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2165 | unsigned index, u64 *data)) | |
2166 | { | |
6aa8b732 AK |
2167 | int i; |
2168 | ||
bccf2150 | 2169 | vcpu_load(vcpu); |
6aa8b732 AK |
2170 | |
2171 | for (i = 0; i < msrs->nmsrs; ++i) | |
2172 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2173 | break; | |
2174 | ||
2175 | vcpu_put(vcpu); | |
2176 | ||
2177 | return i; | |
2178 | } | |
2179 | ||
2180 | /* | |
2181 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2182 | * | |
2183 | * @return number of msrs set successfully. | |
2184 | */ | |
bccf2150 | 2185 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2186 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2187 | unsigned index, u64 *data), | |
2188 | int writeback) | |
2189 | { | |
2190 | struct kvm_msrs msrs; | |
2191 | struct kvm_msr_entry *entries; | |
2192 | int r, n; | |
2193 | unsigned size; | |
2194 | ||
2195 | r = -EFAULT; | |
2196 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2197 | goto out; | |
2198 | ||
2199 | r = -E2BIG; | |
2200 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2201 | goto out; | |
2202 | ||
2203 | r = -ENOMEM; | |
2204 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2205 | entries = vmalloc(size); | |
2206 | if (!entries) | |
2207 | goto out; | |
2208 | ||
2209 | r = -EFAULT; | |
2210 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2211 | goto out_free; | |
2212 | ||
bccf2150 | 2213 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2214 | if (r < 0) |
2215 | goto out_free; | |
2216 | ||
2217 | r = -EFAULT; | |
2218 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2219 | goto out_free; | |
2220 | ||
2221 | r = n; | |
2222 | ||
2223 | out_free: | |
2224 | vfree(entries); | |
2225 | out: | |
2226 | return r; | |
2227 | } | |
2228 | ||
2229 | /* | |
2230 | * Translate a guest virtual address to a guest physical address. | |
2231 | */ | |
bccf2150 AK |
2232 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2233 | struct kvm_translation *tr) | |
6aa8b732 AK |
2234 | { |
2235 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2236 | gpa_t gpa; |
2237 | ||
bccf2150 AK |
2238 | vcpu_load(vcpu); |
2239 | spin_lock(&vcpu->kvm->lock); | |
6aa8b732 AK |
2240 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2241 | tr->physical_address = gpa; | |
2242 | tr->valid = gpa != UNMAPPED_GVA; | |
2243 | tr->writeable = 1; | |
2244 | tr->usermode = 0; | |
bccf2150 | 2245 | spin_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2246 | vcpu_put(vcpu); |
2247 | ||
2248 | return 0; | |
2249 | } | |
2250 | ||
bccf2150 AK |
2251 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2252 | struct kvm_interrupt *irq) | |
6aa8b732 | 2253 | { |
6aa8b732 AK |
2254 | if (irq->irq < 0 || irq->irq >= 256) |
2255 | return -EINVAL; | |
bccf2150 | 2256 | vcpu_load(vcpu); |
6aa8b732 AK |
2257 | |
2258 | set_bit(irq->irq, vcpu->irq_pending); | |
2259 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2260 | ||
2261 | vcpu_put(vcpu); | |
2262 | ||
2263 | return 0; | |
2264 | } | |
2265 | ||
bccf2150 AK |
2266 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2267 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2268 | { |
6aa8b732 AK |
2269 | int r; |
2270 | ||
bccf2150 | 2271 | vcpu_load(vcpu); |
6aa8b732 AK |
2272 | |
2273 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
2274 | ||
2275 | vcpu_put(vcpu); | |
2276 | ||
2277 | return r; | |
2278 | } | |
2279 | ||
9a2bb7f4 AK |
2280 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2281 | unsigned long address, | |
2282 | int *type) | |
2283 | { | |
2284 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2285 | unsigned long pgoff; | |
2286 | struct page *page; | |
2287 | ||
2288 | *type = VM_FAULT_MINOR; | |
2289 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
039576c0 AK |
2290 | if (pgoff == 0) |
2291 | page = virt_to_page(vcpu->run); | |
2292 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2293 | page = virt_to_page(vcpu->pio_data); | |
2294 | else | |
9a2bb7f4 | 2295 | return NOPAGE_SIGBUS; |
9a2bb7f4 AK |
2296 | get_page(page); |
2297 | return page; | |
2298 | } | |
2299 | ||
2300 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2301 | .nopage = kvm_vcpu_nopage, | |
2302 | }; | |
2303 | ||
2304 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2305 | { | |
2306 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2307 | return 0; | |
2308 | } | |
2309 | ||
bccf2150 AK |
2310 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2311 | { | |
2312 | struct kvm_vcpu *vcpu = filp->private_data; | |
2313 | ||
2314 | fput(vcpu->kvm->filp); | |
2315 | return 0; | |
2316 | } | |
2317 | ||
2318 | static struct file_operations kvm_vcpu_fops = { | |
2319 | .release = kvm_vcpu_release, | |
2320 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2321 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2322 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2323 | }; |
2324 | ||
2325 | /* | |
2326 | * Allocates an inode for the vcpu. | |
2327 | */ | |
2328 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2329 | { | |
2330 | int fd, r; | |
2331 | struct inode *inode; | |
2332 | struct file *file; | |
2333 | ||
d6d28168 AK |
2334 | r = anon_inode_getfd(&fd, &inode, &file, |
2335 | "kvm-vcpu", &kvm_vcpu_fops, vcpu); | |
2336 | if (r) | |
2337 | return r; | |
bccf2150 | 2338 | atomic_inc(&vcpu->kvm->filp->f_count); |
bccf2150 | 2339 | return fd; |
bccf2150 AK |
2340 | } |
2341 | ||
c5ea7660 AK |
2342 | /* |
2343 | * Creates some virtual cpus. Good luck creating more than one. | |
2344 | */ | |
2345 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2346 | { | |
2347 | int r; | |
2348 | struct kvm_vcpu *vcpu; | |
9a2bb7f4 | 2349 | struct page *page; |
c5ea7660 AK |
2350 | |
2351 | r = -EINVAL; | |
2352 | if (!valid_vcpu(n)) | |
2353 | goto out; | |
2354 | ||
2355 | vcpu = &kvm->vcpus[n]; | |
2356 | ||
2357 | mutex_lock(&vcpu->mutex); | |
2358 | ||
2359 | if (vcpu->vmcs) { | |
2360 | mutex_unlock(&vcpu->mutex); | |
2361 | return -EEXIST; | |
2362 | } | |
2363 | ||
9a2bb7f4 AK |
2364 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2365 | r = -ENOMEM; | |
2366 | if (!page) | |
2367 | goto out_unlock; | |
2368 | vcpu->run = page_address(page); | |
2369 | ||
039576c0 AK |
2370 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
2371 | r = -ENOMEM; | |
2372 | if (!page) | |
2373 | goto out_free_run; | |
2374 | vcpu->pio_data = page_address(page); | |
2375 | ||
c5ea7660 AK |
2376 | vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf, |
2377 | FX_IMAGE_ALIGN); | |
2378 | vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE; | |
d917a6b9 | 2379 | vcpu->cr0 = 0x10; |
c5ea7660 AK |
2380 | |
2381 | r = kvm_arch_ops->vcpu_create(vcpu); | |
2382 | if (r < 0) | |
2383 | goto out_free_vcpus; | |
2384 | ||
2385 | r = kvm_mmu_create(vcpu); | |
2386 | if (r < 0) | |
2387 | goto out_free_vcpus; | |
2388 | ||
2389 | kvm_arch_ops->vcpu_load(vcpu); | |
2390 | r = kvm_mmu_setup(vcpu); | |
2391 | if (r >= 0) | |
2392 | r = kvm_arch_ops->vcpu_setup(vcpu); | |
2393 | vcpu_put(vcpu); | |
2394 | ||
2395 | if (r < 0) | |
2396 | goto out_free_vcpus; | |
2397 | ||
bccf2150 AK |
2398 | r = create_vcpu_fd(vcpu); |
2399 | if (r < 0) | |
2400 | goto out_free_vcpus; | |
2401 | ||
39c3b86e AK |
2402 | spin_lock(&kvm_lock); |
2403 | if (n >= kvm->nvcpus) | |
2404 | kvm->nvcpus = n + 1; | |
2405 | spin_unlock(&kvm_lock); | |
2406 | ||
bccf2150 | 2407 | return r; |
c5ea7660 AK |
2408 | |
2409 | out_free_vcpus: | |
2410 | kvm_free_vcpu(vcpu); | |
039576c0 AK |
2411 | out_free_run: |
2412 | free_page((unsigned long)vcpu->run); | |
2413 | vcpu->run = NULL; | |
9a2bb7f4 | 2414 | out_unlock: |
c5ea7660 AK |
2415 | mutex_unlock(&vcpu->mutex); |
2416 | out: | |
2417 | return r; | |
2418 | } | |
2419 | ||
2cc51560 ED |
2420 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
2421 | { | |
2422 | u64 efer; | |
2423 | int i; | |
2424 | struct kvm_cpuid_entry *e, *entry; | |
2425 | ||
2426 | rdmsrl(MSR_EFER, efer); | |
2427 | entry = NULL; | |
2428 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
2429 | e = &vcpu->cpuid_entries[i]; | |
2430 | if (e->function == 0x80000001) { | |
2431 | entry = e; | |
2432 | break; | |
2433 | } | |
2434 | } | |
2435 | if (entry && (entry->edx & EFER_NX) && !(efer & EFER_NX)) { | |
2436 | entry->edx &= ~(1 << 20); | |
2437 | printk(KERN_INFO ": guest NX capability removed\n"); | |
2438 | } | |
2439 | } | |
2440 | ||
06465c5a AK |
2441 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2442 | struct kvm_cpuid *cpuid, | |
2443 | struct kvm_cpuid_entry __user *entries) | |
2444 | { | |
2445 | int r; | |
2446 | ||
2447 | r = -E2BIG; | |
2448 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2449 | goto out; | |
2450 | r = -EFAULT; | |
2451 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2452 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2453 | goto out; | |
2454 | vcpu->cpuid_nent = cpuid->nent; | |
2cc51560 | 2455 | cpuid_fix_nx_cap(vcpu); |
06465c5a AK |
2456 | return 0; |
2457 | ||
2458 | out: | |
2459 | return r; | |
2460 | } | |
2461 | ||
1961d276 AK |
2462 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2463 | { | |
2464 | if (sigset) { | |
2465 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2466 | vcpu->sigset_active = 1; | |
2467 | vcpu->sigset = *sigset; | |
2468 | } else | |
2469 | vcpu->sigset_active = 0; | |
2470 | return 0; | |
2471 | } | |
2472 | ||
b8836737 AK |
2473 | /* |
2474 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2475 | * we have asm/x86/processor.h | |
2476 | */ | |
2477 | struct fxsave { | |
2478 | u16 cwd; | |
2479 | u16 swd; | |
2480 | u16 twd; | |
2481 | u16 fop; | |
2482 | u64 rip; | |
2483 | u64 rdp; | |
2484 | u32 mxcsr; | |
2485 | u32 mxcsr_mask; | |
2486 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2487 | #ifdef CONFIG_X86_64 | |
2488 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2489 | #else | |
2490 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2491 | #endif | |
2492 | }; | |
2493 | ||
2494 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2495 | { | |
2496 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2497 | ||
2498 | vcpu_load(vcpu); | |
2499 | ||
2500 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2501 | fpu->fcw = fxsave->cwd; | |
2502 | fpu->fsw = fxsave->swd; | |
2503 | fpu->ftwx = fxsave->twd; | |
2504 | fpu->last_opcode = fxsave->fop; | |
2505 | fpu->last_ip = fxsave->rip; | |
2506 | fpu->last_dp = fxsave->rdp; | |
2507 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2508 | ||
2509 | vcpu_put(vcpu); | |
2510 | ||
2511 | return 0; | |
2512 | } | |
2513 | ||
2514 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2515 | { | |
2516 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2517 | ||
2518 | vcpu_load(vcpu); | |
2519 | ||
2520 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2521 | fxsave->cwd = fpu->fcw; | |
2522 | fxsave->swd = fpu->fsw; | |
2523 | fxsave->twd = fpu->ftwx; | |
2524 | fxsave->fop = fpu->last_opcode; | |
2525 | fxsave->rip = fpu->last_ip; | |
2526 | fxsave->rdp = fpu->last_dp; | |
2527 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2528 | ||
2529 | vcpu_put(vcpu); | |
2530 | ||
2531 | return 0; | |
2532 | } | |
2533 | ||
bccf2150 AK |
2534 | static long kvm_vcpu_ioctl(struct file *filp, |
2535 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2536 | { |
bccf2150 | 2537 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2538 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2539 | int r = -EINVAL; |
2540 | ||
2541 | switch (ioctl) { | |
9a2bb7f4 | 2542 | case KVM_RUN: |
f0fe5108 AK |
2543 | r = -EINVAL; |
2544 | if (arg) | |
2545 | goto out; | |
9a2bb7f4 | 2546 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2547 | break; |
6aa8b732 AK |
2548 | case KVM_GET_REGS: { |
2549 | struct kvm_regs kvm_regs; | |
2550 | ||
bccf2150 AK |
2551 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2552 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2553 | if (r) |
2554 | goto out; | |
2555 | r = -EFAULT; | |
2f366987 | 2556 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2557 | goto out; |
2558 | r = 0; | |
2559 | break; | |
2560 | } | |
2561 | case KVM_SET_REGS: { | |
2562 | struct kvm_regs kvm_regs; | |
2563 | ||
2564 | r = -EFAULT; | |
2f366987 | 2565 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2566 | goto out; |
bccf2150 | 2567 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2568 | if (r) |
2569 | goto out; | |
2570 | r = 0; | |
2571 | break; | |
2572 | } | |
2573 | case KVM_GET_SREGS: { | |
2574 | struct kvm_sregs kvm_sregs; | |
2575 | ||
bccf2150 AK |
2576 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2577 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2578 | if (r) |
2579 | goto out; | |
2580 | r = -EFAULT; | |
2f366987 | 2581 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2582 | goto out; |
2583 | r = 0; | |
2584 | break; | |
2585 | } | |
2586 | case KVM_SET_SREGS: { | |
2587 | struct kvm_sregs kvm_sregs; | |
2588 | ||
2589 | r = -EFAULT; | |
2f366987 | 2590 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2591 | goto out; |
bccf2150 | 2592 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2593 | if (r) |
2594 | goto out; | |
2595 | r = 0; | |
2596 | break; | |
2597 | } | |
2598 | case KVM_TRANSLATE: { | |
2599 | struct kvm_translation tr; | |
2600 | ||
2601 | r = -EFAULT; | |
2f366987 | 2602 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2603 | goto out; |
bccf2150 | 2604 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2605 | if (r) |
2606 | goto out; | |
2607 | r = -EFAULT; | |
2f366987 | 2608 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2609 | goto out; |
2610 | r = 0; | |
2611 | break; | |
2612 | } | |
2613 | case KVM_INTERRUPT: { | |
2614 | struct kvm_interrupt irq; | |
2615 | ||
2616 | r = -EFAULT; | |
2f366987 | 2617 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2618 | goto out; |
bccf2150 | 2619 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2620 | if (r) |
2621 | goto out; | |
2622 | r = 0; | |
2623 | break; | |
2624 | } | |
2625 | case KVM_DEBUG_GUEST: { | |
2626 | struct kvm_debug_guest dbg; | |
2627 | ||
2628 | r = -EFAULT; | |
2f366987 | 2629 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2630 | goto out; |
bccf2150 | 2631 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2632 | if (r) |
2633 | goto out; | |
2634 | r = 0; | |
2635 | break; | |
2636 | } | |
bccf2150 | 2637 | case KVM_GET_MSRS: |
35f3f286 | 2638 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
bccf2150 AK |
2639 | break; |
2640 | case KVM_SET_MSRS: | |
2641 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2642 | break; | |
06465c5a AK |
2643 | case KVM_SET_CPUID: { |
2644 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2645 | struct kvm_cpuid cpuid; | |
2646 | ||
2647 | r = -EFAULT; | |
2648 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2649 | goto out; | |
2650 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2651 | if (r) | |
2652 | goto out; | |
2653 | break; | |
2654 | } | |
1961d276 AK |
2655 | case KVM_SET_SIGNAL_MASK: { |
2656 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2657 | struct kvm_signal_mask kvm_sigmask; | |
2658 | sigset_t sigset, *p; | |
2659 | ||
2660 | p = NULL; | |
2661 | if (argp) { | |
2662 | r = -EFAULT; | |
2663 | if (copy_from_user(&kvm_sigmask, argp, | |
2664 | sizeof kvm_sigmask)) | |
2665 | goto out; | |
2666 | r = -EINVAL; | |
2667 | if (kvm_sigmask.len != sizeof sigset) | |
2668 | goto out; | |
2669 | r = -EFAULT; | |
2670 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2671 | sizeof sigset)) | |
2672 | goto out; | |
2673 | p = &sigset; | |
2674 | } | |
2675 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2676 | break; | |
2677 | } | |
b8836737 AK |
2678 | case KVM_GET_FPU: { |
2679 | struct kvm_fpu fpu; | |
2680 | ||
2681 | memset(&fpu, 0, sizeof fpu); | |
2682 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
2683 | if (r) | |
2684 | goto out; | |
2685 | r = -EFAULT; | |
2686 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
2687 | goto out; | |
2688 | r = 0; | |
2689 | break; | |
2690 | } | |
2691 | case KVM_SET_FPU: { | |
2692 | struct kvm_fpu fpu; | |
2693 | ||
2694 | r = -EFAULT; | |
2695 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
2696 | goto out; | |
2697 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
2698 | if (r) | |
2699 | goto out; | |
2700 | r = 0; | |
2701 | break; | |
2702 | } | |
bccf2150 AK |
2703 | default: |
2704 | ; | |
2705 | } | |
2706 | out: | |
2707 | return r; | |
2708 | } | |
2709 | ||
2710 | static long kvm_vm_ioctl(struct file *filp, | |
2711 | unsigned int ioctl, unsigned long arg) | |
2712 | { | |
2713 | struct kvm *kvm = filp->private_data; | |
2714 | void __user *argp = (void __user *)arg; | |
2715 | int r = -EINVAL; | |
2716 | ||
2717 | switch (ioctl) { | |
2718 | case KVM_CREATE_VCPU: | |
2719 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2720 | if (r < 0) | |
2721 | goto out; | |
2722 | break; | |
6aa8b732 AK |
2723 | case KVM_SET_MEMORY_REGION: { |
2724 | struct kvm_memory_region kvm_mem; | |
2725 | ||
2726 | r = -EFAULT; | |
2f366987 | 2727 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2728 | goto out; |
2c6f5df9 | 2729 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2730 | if (r) |
2731 | goto out; | |
2732 | break; | |
2733 | } | |
2734 | case KVM_GET_DIRTY_LOG: { | |
2735 | struct kvm_dirty_log log; | |
2736 | ||
2737 | r = -EFAULT; | |
2f366987 | 2738 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2739 | goto out; |
2c6f5df9 | 2740 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2741 | if (r) |
2742 | goto out; | |
2743 | break; | |
2744 | } | |
e8207547 AK |
2745 | case KVM_SET_MEMORY_ALIAS: { |
2746 | struct kvm_memory_alias alias; | |
2747 | ||
2748 | r = -EFAULT; | |
2749 | if (copy_from_user(&alias, argp, sizeof alias)) | |
2750 | goto out; | |
2751 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
2752 | if (r) | |
2753 | goto out; | |
2754 | break; | |
2755 | } | |
f17abe9a AK |
2756 | default: |
2757 | ; | |
2758 | } | |
2759 | out: | |
2760 | return r; | |
2761 | } | |
2762 | ||
2763 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2764 | unsigned long address, | |
2765 | int *type) | |
2766 | { | |
2767 | struct kvm *kvm = vma->vm_file->private_data; | |
2768 | unsigned long pgoff; | |
f17abe9a AK |
2769 | struct page *page; |
2770 | ||
2771 | *type = VM_FAULT_MINOR; | |
2772 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; | |
954bbbc2 | 2773 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
2774 | if (!page) |
2775 | return NOPAGE_SIGBUS; | |
2776 | get_page(page); | |
2777 | return page; | |
2778 | } | |
2779 | ||
2780 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2781 | .nopage = kvm_vm_nopage, | |
2782 | }; | |
2783 | ||
2784 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2785 | { | |
2786 | vma->vm_ops = &kvm_vm_vm_ops; | |
2787 | return 0; | |
2788 | } | |
2789 | ||
2790 | static struct file_operations kvm_vm_fops = { | |
2791 | .release = kvm_vm_release, | |
2792 | .unlocked_ioctl = kvm_vm_ioctl, | |
2793 | .compat_ioctl = kvm_vm_ioctl, | |
2794 | .mmap = kvm_vm_mmap, | |
2795 | }; | |
2796 | ||
2797 | static int kvm_dev_ioctl_create_vm(void) | |
2798 | { | |
2799 | int fd, r; | |
2800 | struct inode *inode; | |
2801 | struct file *file; | |
2802 | struct kvm *kvm; | |
2803 | ||
f17abe9a | 2804 | kvm = kvm_create_vm(); |
d6d28168 AK |
2805 | if (IS_ERR(kvm)) |
2806 | return PTR_ERR(kvm); | |
2807 | r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm); | |
2808 | if (r) { | |
2809 | kvm_destroy_vm(kvm); | |
2810 | return r; | |
f17abe9a AK |
2811 | } |
2812 | ||
bccf2150 | 2813 | kvm->filp = file; |
f17abe9a | 2814 | |
f17abe9a | 2815 | return fd; |
f17abe9a AK |
2816 | } |
2817 | ||
2818 | static long kvm_dev_ioctl(struct file *filp, | |
2819 | unsigned int ioctl, unsigned long arg) | |
2820 | { | |
2821 | void __user *argp = (void __user *)arg; | |
07c45a36 | 2822 | long r = -EINVAL; |
f17abe9a AK |
2823 | |
2824 | switch (ioctl) { | |
2825 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2826 | r = -EINVAL; |
2827 | if (arg) | |
2828 | goto out; | |
f17abe9a AK |
2829 | r = KVM_API_VERSION; |
2830 | break; | |
2831 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2832 | r = -EINVAL; |
2833 | if (arg) | |
2834 | goto out; | |
f17abe9a AK |
2835 | r = kvm_dev_ioctl_create_vm(); |
2836 | break; | |
6aa8b732 | 2837 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 2838 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
2839 | struct kvm_msr_list msr_list; |
2840 | unsigned n; | |
2841 | ||
2842 | r = -EFAULT; | |
2843 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2844 | goto out; | |
2845 | n = msr_list.nmsrs; | |
6f00e68f | 2846 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
2847 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2848 | goto out; | |
2849 | r = -E2BIG; | |
bf591b24 | 2850 | if (n < num_msrs_to_save) |
6aa8b732 AK |
2851 | goto out; |
2852 | r = -EFAULT; | |
2853 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 2854 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 2855 | goto out; |
6f00e68f AK |
2856 | if (copy_to_user(user_msr_list->indices |
2857 | + num_msrs_to_save * sizeof(u32), | |
2858 | &emulated_msrs, | |
2859 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2860 | goto out; | |
6aa8b732 | 2861 | r = 0; |
cc1d8955 | 2862 | break; |
6aa8b732 | 2863 | } |
5d308f45 AK |
2864 | case KVM_CHECK_EXTENSION: |
2865 | /* | |
2866 | * No extensions defined at present. | |
2867 | */ | |
2868 | r = 0; | |
2869 | break; | |
07c45a36 AK |
2870 | case KVM_GET_VCPU_MMAP_SIZE: |
2871 | r = -EINVAL; | |
2872 | if (arg) | |
2873 | goto out; | |
039576c0 | 2874 | r = 2 * PAGE_SIZE; |
07c45a36 | 2875 | break; |
6aa8b732 AK |
2876 | default: |
2877 | ; | |
2878 | } | |
2879 | out: | |
2880 | return r; | |
2881 | } | |
2882 | ||
6aa8b732 AK |
2883 | static struct file_operations kvm_chardev_ops = { |
2884 | .open = kvm_dev_open, | |
2885 | .release = kvm_dev_release, | |
2886 | .unlocked_ioctl = kvm_dev_ioctl, | |
2887 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2888 | }; |
2889 | ||
2890 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2891 | KVM_MINOR, |
6aa8b732 AK |
2892 | "kvm", |
2893 | &kvm_chardev_ops, | |
2894 | }; | |
2895 | ||
2896 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, | |
2897 | void *v) | |
2898 | { | |
2899 | if (val == SYS_RESTART) { | |
2900 | /* | |
2901 | * Some (well, at least mine) BIOSes hang on reboot if | |
2902 | * in vmx root mode. | |
2903 | */ | |
2904 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
1b6c0168 | 2905 | on_each_cpu(hardware_disable, NULL, 0, 1); |
6aa8b732 AK |
2906 | } |
2907 | return NOTIFY_OK; | |
2908 | } | |
2909 | ||
2910 | static struct notifier_block kvm_reboot_notifier = { | |
2911 | .notifier_call = kvm_reboot, | |
2912 | .priority = 0, | |
2913 | }; | |
2914 | ||
774c47f1 AK |
2915 | /* |
2916 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
2917 | * cached on it. | |
2918 | */ | |
2919 | static void decache_vcpus_on_cpu(int cpu) | |
2920 | { | |
2921 | struct kvm *vm; | |
2922 | struct kvm_vcpu *vcpu; | |
2923 | int i; | |
2924 | ||
2925 | spin_lock(&kvm_lock); | |
2926 | list_for_each_entry(vm, &vm_list, vm_list) | |
2927 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
2928 | vcpu = &vm->vcpus[i]; | |
2929 | /* | |
2930 | * If the vcpu is locked, then it is running on some | |
2931 | * other cpu and therefore it is not cached on the | |
2932 | * cpu in question. | |
2933 | * | |
2934 | * If it's not locked, check the last cpu it executed | |
2935 | * on. | |
2936 | */ | |
2937 | if (mutex_trylock(&vcpu->mutex)) { | |
2938 | if (vcpu->cpu == cpu) { | |
2939 | kvm_arch_ops->vcpu_decache(vcpu); | |
2940 | vcpu->cpu = -1; | |
2941 | } | |
2942 | mutex_unlock(&vcpu->mutex); | |
2943 | } | |
2944 | } | |
2945 | spin_unlock(&kvm_lock); | |
2946 | } | |
2947 | ||
1b6c0168 AK |
2948 | static void hardware_enable(void *junk) |
2949 | { | |
2950 | int cpu = raw_smp_processor_id(); | |
2951 | ||
2952 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
2953 | return; | |
2954 | cpu_set(cpu, cpus_hardware_enabled); | |
2955 | kvm_arch_ops->hardware_enable(NULL); | |
2956 | } | |
2957 | ||
2958 | static void hardware_disable(void *junk) | |
2959 | { | |
2960 | int cpu = raw_smp_processor_id(); | |
2961 | ||
2962 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
2963 | return; | |
2964 | cpu_clear(cpu, cpus_hardware_enabled); | |
2965 | decache_vcpus_on_cpu(cpu); | |
2966 | kvm_arch_ops->hardware_disable(NULL); | |
2967 | } | |
2968 | ||
774c47f1 AK |
2969 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2970 | void *v) | |
2971 | { | |
2972 | int cpu = (long)v; | |
2973 | ||
2974 | switch (val) { | |
cec9ad27 AK |
2975 | case CPU_DYING: |
2976 | case CPU_DYING_FROZEN: | |
774c47f1 | 2977 | case CPU_UP_CANCELED: |
8bb78442 | 2978 | case CPU_UP_CANCELED_FROZEN: |
43934a38 JK |
2979 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
2980 | cpu); | |
1b6c0168 | 2981 | smp_call_function_single(cpu, hardware_disable, NULL, 0, 1); |
774c47f1 | 2982 | break; |
43934a38 | 2983 | case CPU_ONLINE: |
8bb78442 | 2984 | case CPU_ONLINE_FROZEN: |
43934a38 JK |
2985 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
2986 | cpu); | |
1b6c0168 | 2987 | smp_call_function_single(cpu, hardware_enable, NULL, 0, 1); |
774c47f1 AK |
2988 | break; |
2989 | } | |
2990 | return NOTIFY_OK; | |
2991 | } | |
2992 | ||
2eeb2e94 GH |
2993 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
2994 | { | |
2995 | memset(bus, 0, sizeof(*bus)); | |
2996 | } | |
2997 | ||
2998 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
2999 | { | |
3000 | int i; | |
3001 | ||
3002 | for (i = 0; i < bus->dev_count; i++) { | |
3003 | struct kvm_io_device *pos = bus->devs[i]; | |
3004 | ||
3005 | kvm_iodevice_destructor(pos); | |
3006 | } | |
3007 | } | |
3008 | ||
3009 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr) | |
3010 | { | |
3011 | int i; | |
3012 | ||
3013 | for (i = 0; i < bus->dev_count; i++) { | |
3014 | struct kvm_io_device *pos = bus->devs[i]; | |
3015 | ||
3016 | if (pos->in_range(pos, addr)) | |
3017 | return pos; | |
3018 | } | |
3019 | ||
3020 | return NULL; | |
3021 | } | |
3022 | ||
3023 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
3024 | { | |
3025 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
3026 | ||
3027 | bus->devs[bus->dev_count++] = dev; | |
3028 | } | |
3029 | ||
774c47f1 AK |
3030 | static struct notifier_block kvm_cpu_notifier = { |
3031 | .notifier_call = kvm_cpu_hotplug, | |
3032 | .priority = 20, /* must be > scheduler priority */ | |
3033 | }; | |
3034 | ||
1165f5fe AK |
3035 | static u64 stat_get(void *_offset) |
3036 | { | |
3037 | unsigned offset = (long)_offset; | |
3038 | u64 total = 0; | |
3039 | struct kvm *kvm; | |
3040 | struct kvm_vcpu *vcpu; | |
3041 | int i; | |
3042 | ||
3043 | spin_lock(&kvm_lock); | |
3044 | list_for_each_entry(kvm, &vm_list, vm_list) | |
3045 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
3046 | vcpu = &kvm->vcpus[i]; | |
3047 | total += *(u32 *)((void *)vcpu + offset); | |
3048 | } | |
3049 | spin_unlock(&kvm_lock); | |
3050 | return total; | |
3051 | } | |
3052 | ||
3053 | static void stat_set(void *offset, u64 val) | |
3054 | { | |
3055 | } | |
3056 | ||
3057 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, stat_set, "%llu\n"); | |
3058 | ||
6aa8b732 AK |
3059 | static __init void kvm_init_debug(void) |
3060 | { | |
3061 | struct kvm_stats_debugfs_item *p; | |
3062 | ||
8b6d44c7 | 3063 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 3064 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
3065 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
3066 | (void *)(long)p->offset, | |
3067 | &stat_fops); | |
6aa8b732 AK |
3068 | } |
3069 | ||
3070 | static void kvm_exit_debug(void) | |
3071 | { | |
3072 | struct kvm_stats_debugfs_item *p; | |
3073 | ||
3074 | for (p = debugfs_entries; p->name; ++p) | |
3075 | debugfs_remove(p->dentry); | |
3076 | debugfs_remove(debugfs_dir); | |
3077 | } | |
3078 | ||
59ae6c6b AK |
3079 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
3080 | { | |
4267c41a | 3081 | hardware_disable(NULL); |
59ae6c6b AK |
3082 | return 0; |
3083 | } | |
3084 | ||
3085 | static int kvm_resume(struct sys_device *dev) | |
3086 | { | |
4267c41a | 3087 | hardware_enable(NULL); |
59ae6c6b AK |
3088 | return 0; |
3089 | } | |
3090 | ||
3091 | static struct sysdev_class kvm_sysdev_class = { | |
3092 | set_kset_name("kvm"), | |
3093 | .suspend = kvm_suspend, | |
3094 | .resume = kvm_resume, | |
3095 | }; | |
3096 | ||
3097 | static struct sys_device kvm_sysdev = { | |
3098 | .id = 0, | |
3099 | .cls = &kvm_sysdev_class, | |
3100 | }; | |
3101 | ||
6aa8b732 AK |
3102 | hpa_t bad_page_address; |
3103 | ||
3104 | int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module) | |
3105 | { | |
3106 | int r; | |
3107 | ||
09db28b8 YI |
3108 | if (kvm_arch_ops) { |
3109 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
3110 | return -EEXIST; | |
3111 | } | |
3112 | ||
e097f35c | 3113 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
3114 | printk(KERN_ERR "kvm: no hardware support\n"); |
3115 | return -EOPNOTSUPP; | |
3116 | } | |
e097f35c | 3117 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3118 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3119 | return -EOPNOTSUPP; | |
3120 | } | |
3121 | ||
e097f35c YI |
3122 | kvm_arch_ops = ops; |
3123 | ||
6aa8b732 AK |
3124 | r = kvm_arch_ops->hardware_setup(); |
3125 | if (r < 0) | |
ca45aaae | 3126 | goto out; |
6aa8b732 | 3127 | |
1b6c0168 | 3128 | on_each_cpu(hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3129 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3130 | if (r) | |
3131 | goto out_free_1; | |
6aa8b732 AK |
3132 | register_reboot_notifier(&kvm_reboot_notifier); |
3133 | ||
59ae6c6b AK |
3134 | r = sysdev_class_register(&kvm_sysdev_class); |
3135 | if (r) | |
3136 | goto out_free_2; | |
3137 | ||
3138 | r = sysdev_register(&kvm_sysdev); | |
3139 | if (r) | |
3140 | goto out_free_3; | |
3141 | ||
6aa8b732 AK |
3142 | kvm_chardev_ops.owner = module; |
3143 | ||
3144 | r = misc_register(&kvm_dev); | |
3145 | if (r) { | |
3146 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
3147 | goto out_free; | |
3148 | } | |
3149 | ||
3150 | return r; | |
3151 | ||
3152 | out_free: | |
59ae6c6b AK |
3153 | sysdev_unregister(&kvm_sysdev); |
3154 | out_free_3: | |
3155 | sysdev_class_unregister(&kvm_sysdev_class); | |
3156 | out_free_2: | |
6aa8b732 | 3157 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3158 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3159 | out_free_1: | |
1b6c0168 | 3160 | on_each_cpu(hardware_disable, NULL, 0, 1); |
6aa8b732 | 3161 | kvm_arch_ops->hardware_unsetup(); |
ca45aaae AK |
3162 | out: |
3163 | kvm_arch_ops = NULL; | |
6aa8b732 AK |
3164 | return r; |
3165 | } | |
3166 | ||
3167 | void kvm_exit_arch(void) | |
3168 | { | |
3169 | misc_deregister(&kvm_dev); | |
59ae6c6b AK |
3170 | sysdev_unregister(&kvm_sysdev); |
3171 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3172 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3173 | unregister_cpu_notifier(&kvm_cpu_notifier); |
1b6c0168 | 3174 | on_each_cpu(hardware_disable, NULL, 0, 1); |
6aa8b732 | 3175 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 3176 | kvm_arch_ops = NULL; |
6aa8b732 AK |
3177 | } |
3178 | ||
3179 | static __init int kvm_init(void) | |
3180 | { | |
3181 | static struct page *bad_page; | |
37e29d90 AK |
3182 | int r; |
3183 | ||
b5a33a75 AK |
3184 | r = kvm_mmu_module_init(); |
3185 | if (r) | |
3186 | goto out4; | |
3187 | ||
6aa8b732 AK |
3188 | kvm_init_debug(); |
3189 | ||
bf591b24 MR |
3190 | kvm_init_msr_list(); |
3191 | ||
6aa8b732 AK |
3192 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
3193 | r = -ENOMEM; | |
3194 | goto out; | |
3195 | } | |
3196 | ||
3197 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3198 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3199 | ||
58e690e6 | 3200 | return 0; |
6aa8b732 AK |
3201 | |
3202 | out: | |
3203 | kvm_exit_debug(); | |
b5a33a75 AK |
3204 | kvm_mmu_module_exit(); |
3205 | out4: | |
6aa8b732 AK |
3206 | return r; |
3207 | } | |
3208 | ||
3209 | static __exit void kvm_exit(void) | |
3210 | { | |
3211 | kvm_exit_debug(); | |
3212 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
b5a33a75 | 3213 | kvm_mmu_module_exit(); |
6aa8b732 AK |
3214 | } |
3215 | ||
3216 | module_init(kvm_init) | |
3217 | module_exit(kvm_exit) | |
3218 | ||
3219 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
3220 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |