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KVM: round robin for APIC lowest priority delivery mode
[deliverable/linux.git] / drivers / kvm / kvm_main.c
CommitLineData
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"
85f455f7 21#include "irq.h"
6aa8b732
AK		 22
23#include <linux/kvm.h>
24#include <linux/module.h>
25#include <linux/errno.h>
6aa8b732
AK		 26#include <linux/percpu.h>
27#include <linux/gfp.h>
6aa8b732
AK		 28#include <linux/mm.h>
29#include <linux/miscdevice.h>
30#include <linux/vmalloc.h>
6aa8b732 31#include <linux/reboot.h>
6aa8b732
AK		 32#include <linux/debugfs.h>
33#include <linux/highmem.h>
34#include <linux/file.h>
59ae6c6b 35#include <linux/sysdev.h>
774c47f1 36#include <linux/cpu.h>
e8edc6e0 37#include <linux/sched.h>
d9e368d6
AK		 38#include <linux/cpumask.h>
39#include <linux/smp.h>
d6d28168 40#include <linux/anon_inodes.h>
6aa8b732 41
e495606d
AK		 42#include <asm/processor.h>
43#include <asm/msr.h>
44#include <asm/io.h>
45#include <asm/uaccess.h>
46#include <asm/desc.h>
6aa8b732
AK		 47
48MODULE_AUTHOR("Qumranet");
49MODULE_LICENSE("GPL");
50
133de902
AK		 51static DEFINE_SPINLOCK(kvm_lock);
52static LIST_HEAD(vm_list);
53
1b6c0168
AK		 54static cpumask_t cpus_hardware_enabled;
55
6aa8b732 56struct kvm_arch_ops *kvm_arch_ops;
c16f862d
RR		 57struct kmem_cache *kvm_vcpu_cache;
58EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 59
15ad7146
AK		 60static __read_mostly struct preempt_ops kvm_preempt_ops;
61
1165f5fe 62#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
6aa8b732
AK		 63
64static struct kvm_stats_debugfs_item {
65 const char *name;
1165f5fe 66 int offset;
6aa8b732
AK		 67 struct dentry *dentry;
68} debugfs_entries[] = {
1165f5fe
AK		 69 { "pf_fixed", STAT_OFFSET(pf_fixed) },
70 { "pf_guest", STAT_OFFSET(pf_guest) },
71 { "tlb_flush", STAT_OFFSET(tlb_flush) },
72 { "invlpg", STAT_OFFSET(invlpg) },
73 { "exits", STAT_OFFSET(exits) },
74 { "io_exits", STAT_OFFSET(io_exits) },
75 { "mmio_exits", STAT_OFFSET(mmio_exits) },
76 { "signal_exits", STAT_OFFSET(signal_exits) },
77 { "irq_window", STAT_OFFSET(irq_window_exits) },
78 { "halt_exits", STAT_OFFSET(halt_exits) },
b6958ce4 79 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
1165f5fe
AK		 80 { "request_irq", STAT_OFFSET(request_irq_exits) },
81 { "irq_exits", STAT_OFFSET(irq_exits) },
e6adf283 82 { "light_exits", STAT_OFFSET(light_exits) },
2cc51560 83 { "efer_reload", STAT_OFFSET(efer_reload) },
1165f5fe 84 { NULL }
6aa8b732
AK		 85};
86
87static struct dentry *debugfs_dir;
88
89#define MAX_IO_MSRS 256
90
707d92fa
RR		 91#define CR0_RESERVED_BITS \
92 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
93 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
94 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
66aee91a
RR		 95#define CR4_RESERVED_BITS \
96 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
97 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
98 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
99 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
100
7075bc81 101#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
6aa8b732
AK		 102#define EFER_RESERVED_BITS 0xfffffffffffff2fe
103
05b3e0c2 104#ifdef CONFIG_X86_64
6aa8b732
AK		 105// LDT or TSS descriptor in the GDT. 16 bytes.
106struct segment_descriptor_64 {
107 struct segment_descriptor s;
108 u32 base_higher;
109 u32 pad_zero;
110};
111
112#endif
113
bccf2150
AK		 114static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
115 unsigned long arg);
116
6aa8b732
AK		 117unsigned long segment_base(u16 selector)
118{
119 struct descriptor_table gdt;
120 struct segment_descriptor *d;
121 unsigned long table_base;
122 typedef unsigned long ul;
123 unsigned long v;
124
125 if (selector == 0)
126 return 0;
127
128 asm ("sgdt %0" : "=m"(gdt));
129 table_base = gdt.base;
130
131 if (selector & 4) { /* from ldt */
132 u16 ldt_selector;
133
134 asm ("sldt %0" : "=g"(ldt_selector));
135 table_base = segment_base(ldt_selector);
136 }
137 d = (struct segment_descriptor *)(table_base + (selector & ~7));
138 v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
05b3e0c2 139#ifdef CONFIG_X86_64
6aa8b732
AK		 140 if (d->system == 0
141 && (d->type == 2 || d->type == 9 || d->type == 11))
142 v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32;
143#endif
144 return v;
145}
146EXPORT_SYMBOL_GPL(segment_base);
147
5aacf0ca
JM		 148static inline int valid_vcpu(int n)
149{
150 return likely(n >= 0 && n < KVM_MAX_VCPUS);
151}
152
7702fd1f
AK		 153void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
154{
155 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
156 return;
157
158 vcpu->guest_fpu_loaded = 1;
b114b080
RR		 159 fx_save(&vcpu->host_fx_image);
160 fx_restore(&vcpu->guest_fx_image);
7702fd1f
AK		 161}
162EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
163
164void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
165{
166 if (!vcpu->guest_fpu_loaded)
167 return;
168
169 vcpu->guest_fpu_loaded = 0;
b114b080
RR		 170 fx_save(&vcpu->guest_fx_image);
171 fx_restore(&vcpu->host_fx_image);
7702fd1f
AK		 172}
173EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
174
bccf2150
AK		 175/*
176 * Switches to specified vcpu, until a matching vcpu_put()
177 */
178static void vcpu_load(struct kvm_vcpu *vcpu)
6aa8b732 179{
15ad7146
AK		 180 int cpu;
181
bccf2150 182 mutex_lock(&vcpu->mutex);
15ad7146
AK		 183 cpu = get_cpu();
184 preempt_notifier_register(&vcpu->preempt_notifier);
185 kvm_arch_ops->vcpu_load(vcpu, cpu);
186 put_cpu();
6aa8b732
AK		 187}
188
6aa8b732
AK		 189static void vcpu_put(struct kvm_vcpu *vcpu)
190{
15ad7146 191 preempt_disable();
6aa8b732 192 kvm_arch_ops->vcpu_put(vcpu);
15ad7146
AK		 193 preempt_notifier_unregister(&vcpu->preempt_notifier);
194 preempt_enable();
6aa8b732
AK		 195 mutex_unlock(&vcpu->mutex);
196}
197
d9e368d6
AK		 198static void ack_flush(void *_completed)
199{
200 atomic_t *completed = _completed;
201
202 atomic_inc(completed);
203}
204
205void kvm_flush_remote_tlbs(struct kvm *kvm)
206{
207 int i, cpu, needed;
208 cpumask_t cpus;
209 struct kvm_vcpu *vcpu;
210 atomic_t completed;
211
212 atomic_set(&completed, 0);
213 cpus_clear(cpus);
214 needed = 0;
fb3f0f51
RR		 215 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
216 vcpu = kvm->vcpus[i];
217 if (!vcpu)
218 continue;
d9e368d6
AK		 219 if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests))
220 continue;
221 cpu = vcpu->cpu;
222 if (cpu != -1 && cpu != raw_smp_processor_id())
223 if (!cpu_isset(cpu, cpus)) {
224 cpu_set(cpu, cpus);
225 ++needed;
226 }
227 }
228
229 /*
230 * We really want smp_call_function_mask() here. But that's not
231 * available, so ipi all cpus in parallel and wait for them
232 * to complete.
233 */
234 for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus))
235 smp_call_function_single(cpu, ack_flush, &completed, 1, 0);
236 while (atomic_read(&completed) != needed) {
237 cpu_relax();
238 barrier();
239 }
240}
241
fb3f0f51
RR		 242int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
243{
244 struct page *page;
245 int r;
246
247 mutex_init(&vcpu->mutex);
248 vcpu->cpu = -1;
249 vcpu->mmu.root_hpa = INVALID_PAGE;
250 vcpu->kvm = kvm;
251 vcpu->vcpu_id = id;
b6958ce4 252 init_waitqueue_head(&vcpu->wq);
fb3f0f51
RR		 253
254 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
255 if (!page) {
256 r = -ENOMEM;
257 goto fail;
258 }
259 vcpu->run = page_address(page);
260
261 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
262 if (!page) {
263 r = -ENOMEM;
264 goto fail_free_run;
265 }
266 vcpu->pio_data = page_address(page);
267
fb3f0f51
RR		 268 r = kvm_mmu_create(vcpu);
269 if (r < 0)
270 goto fail_free_pio_data;
271
272 return 0;
273
274fail_free_pio_data:
275 free_page((unsigned long)vcpu->pio_data);
276fail_free_run:
277 free_page((unsigned long)vcpu->run);
278fail:
279 return -ENOMEM;
280}
281EXPORT_SYMBOL_GPL(kvm_vcpu_init);
282
283void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
284{
285 kvm_mmu_destroy(vcpu);
1b9778da
ED		 286 if (vcpu->apic)
287 hrtimer_cancel(&vcpu->apic->timer.dev);
97222cc8 288 kvm_free_apic(vcpu->apic);
fb3f0f51
RR		 289 free_page((unsigned long)vcpu->pio_data);
290 free_page((unsigned long)vcpu->run);
291}
292EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
293
f17abe9a 294static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 295{
296 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
6aa8b732
AK		 297
298 if (!kvm)
f17abe9a 299 return ERR_PTR(-ENOMEM);
6aa8b732 300
74906345 301 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 302 mutex_init(&kvm->lock);
6aa8b732 303 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2eeb2e94 304 kvm_io_bus_init(&kvm->mmio_bus);
5e58cfe4
RR		 305 spin_lock(&kvm_lock);
306 list_add(&kvm->vm_list, &vm_list);
307 spin_unlock(&kvm_lock);
f17abe9a
AK		 308 return kvm;
309}
310
6aa8b732
AK		 311/*
312 * Free any memory in @free but not in @dont.
313 */
314static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
315 struct kvm_memory_slot *dont)
316{
317 int i;
318
319 if (!dont || free->phys_mem != dont->phys_mem)
320 if (free->phys_mem) {
321 for (i = 0; i < free->npages; ++i)
55a54f79
AK		 322 if (free->phys_mem[i])
323 __free_page(free->phys_mem[i]);
6aa8b732
AK		 324 vfree(free->phys_mem);
325 }
326
327 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
328 vfree(free->dirty_bitmap);
329
8b6d44c7 330 free->phys_mem = NULL;
6aa8b732 331 free->npages = 0;
8b6d44c7 332 free->dirty_bitmap = NULL;
6aa8b732
AK		 333}
334
335static void kvm_free_physmem(struct kvm *kvm)
336{
337 int i;
338
339 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 340 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 341}
342
039576c0
AK		 343static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
344{
345 int i;
346
3077c451 347 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
039576c0
AK		 348 if (vcpu->pio.guest_pages[i]) {
349 __free_page(vcpu->pio.guest_pages[i]);
350 vcpu->pio.guest_pages[i] = NULL;
351 }
352}
353
7b53aa56
AK		 354static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
355{
7b53aa56
AK		 356 vcpu_load(vcpu);
357 kvm_mmu_unload(vcpu);
358 vcpu_put(vcpu);
359}
360
6aa8b732
AK		 361static void kvm_free_vcpus(struct kvm *kvm)
362{
363 unsigned int i;
364
7b53aa56
AK		 365 /*
366 * Unpin any mmu pages first.
367 */
368 for (i = 0; i < KVM_MAX_VCPUS; ++i)
fb3f0f51
RR		 369 if (kvm->vcpus[i])
370 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
371 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
372 if (kvm->vcpus[i]) {
373 kvm_arch_ops->vcpu_free(kvm->vcpus[i]);
374 kvm->vcpus[i] = NULL;
375 }
376 }
377
6aa8b732
AK		 378}
379
f17abe9a
AK		 380static void kvm_destroy_vm(struct kvm *kvm)
381{
133de902
AK		 382 spin_lock(&kvm_lock);
383 list_del(&kvm->vm_list);
384 spin_unlock(&kvm_lock);
74906345 385 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 386 kvm_io_bus_destroy(&kvm->mmio_bus);
85f455f7 387 kfree(kvm->vpic);
1fd4f2a5 388 kfree(kvm->vioapic);
6aa8b732
AK		 389 kvm_free_vcpus(kvm);
390 kvm_free_physmem(kvm);
391 kfree(kvm);
f17abe9a
AK		 392}
393
394static int kvm_vm_release(struct inode *inode, struct file *filp)
395{
396 struct kvm *kvm = filp->private_data;
397
398 kvm_destroy_vm(kvm);
6aa8b732
AK		 399 return 0;
400}
401
402static void inject_gp(struct kvm_vcpu *vcpu)
403{
404 kvm_arch_ops->inject_gp(vcpu, 0);
405}
406
1342d353
AK		 407/*
408 * Load the pae pdptrs. Return true is they are all valid.
409 */
410static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 411{
412 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 413 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732 414 int i;
6aa8b732 415 u64 *pdpt;
1342d353 416 int ret;
954bbbc2 417 struct page *page;
c820c2aa 418 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
6aa8b732 419
11ec2804 420 mutex_lock(&vcpu->kvm->lock);
954bbbc2 421 page = gfn_to_page(vcpu->kvm, pdpt_gfn);
c820c2aa
RR		 422 if (!page) {
423 ret = 0;
424 goto out;
425 }
426
954bbbc2 427 pdpt = kmap_atomic(page, KM_USER0);
c820c2aa
RR		 428 memcpy(pdpte, pdpt+offset, sizeof(pdpte));
429 kunmap_atomic(pdpt, KM_USER0);
6aa8b732 430
c820c2aa
RR		 431 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
432 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
1342d353
AK		 433 ret = 0;
434 goto out;
435 }
6aa8b732 436 }
c820c2aa 437 ret = 1;
6aa8b732 438
c820c2aa 439 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
1342d353 440out:
11ec2804 441 mutex_unlock(&vcpu->kvm->lock);
6aa8b732 442
1342d353 443 return ret;
6aa8b732
AK		 444}
445
446void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
447{
707d92fa 448 if (cr0 & CR0_RESERVED_BITS) {
6aa8b732
AK		 449 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
450 cr0, vcpu->cr0);
451 inject_gp(vcpu);
452 return;
453 }
454
707d92fa 455 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
6aa8b732
AK		 456 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
457 inject_gp(vcpu);
458 return;
459 }
460
707d92fa 461 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
6aa8b732
AK		 462 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
463 "and a clear PE flag\n");
464 inject_gp(vcpu);
465 return;
466 }
467
707d92fa 468 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
05b3e0c2 469#ifdef CONFIG_X86_64
6aa8b732
AK		 470 if ((vcpu->shadow_efer & EFER_LME)) {
471 int cs_db, cs_l;
472
473 if (!is_pae(vcpu)) {
474 printk(KERN_DEBUG "set_cr0: #GP, start paging "
475 "in long mode while PAE is disabled\n");
476 inject_gp(vcpu);
477 return;
478 }
479 kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
480 if (cs_l) {
481 printk(KERN_DEBUG "set_cr0: #GP, start paging "
482 "in long mode while CS.L == 1\n");
483 inject_gp(vcpu);
484 return;
485
486 }
487 } else
488#endif
1342d353 489 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 490 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
491 "reserved bits\n");
492 inject_gp(vcpu);
493 return;
494 }
495
496 }
497
498 kvm_arch_ops->set_cr0(vcpu, cr0);
499 vcpu->cr0 = cr0;
500
11ec2804 501 mutex_lock(&vcpu->kvm->lock);
6aa8b732 502 kvm_mmu_reset_context(vcpu);
11ec2804 503 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 504 return;
505}
506EXPORT_SYMBOL_GPL(set_cr0);
507
508void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
509{
510 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
511}
512EXPORT_SYMBOL_GPL(lmsw);
513
514void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
515{
66aee91a 516 if (cr4 & CR4_RESERVED_BITS) {
6aa8b732
AK		 517 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
518 inject_gp(vcpu);
519 return;
520 }
521
a9058ecd 522 if (is_long_mode(vcpu)) {
66aee91a 523 if (!(cr4 & X86_CR4_PAE)) {
6aa8b732
AK		 524 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
525 "in long mode\n");
526 inject_gp(vcpu);
527 return;
528 }
66aee91a 529 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
1342d353 530 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 531 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
532 inject_gp(vcpu);
310bc76c 533 return;
6aa8b732
AK		 534 }
535
66aee91a 536 if (cr4 & X86_CR4_VMXE) {
6aa8b732
AK		 537 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
538 inject_gp(vcpu);
539 return;
540 }
541 kvm_arch_ops->set_cr4(vcpu, cr4);
11ec2804 542 mutex_lock(&vcpu->kvm->lock);
6aa8b732 543 kvm_mmu_reset_context(vcpu);
11ec2804 544 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 545}
546EXPORT_SYMBOL_GPL(set_cr4);
547
548void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
549{
a9058ecd 550 if (is_long_mode(vcpu)) {
f802a307 551 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
6aa8b732
AK		 552 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
553 inject_gp(vcpu);
554 return;
555 }
556 } else {
f802a307
RR		 557 if (is_pae(vcpu)) {
558 if (cr3 & CR3_PAE_RESERVED_BITS) {
559 printk(KERN_DEBUG
560 "set_cr3: #GP, reserved bits\n");
561 inject_gp(vcpu);
562 return;
563 }
564 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
565 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
566 "reserved bits\n");
567 inject_gp(vcpu);
568 return;
569 }
570 } else {
571 if (cr3 & CR3_NONPAE_RESERVED_BITS) {
572 printk(KERN_DEBUG
573 "set_cr3: #GP, reserved bits\n");
574 inject_gp(vcpu);
575 return;
576 }
6aa8b732
AK		 577 }
578 }
579
11ec2804 580 mutex_lock(&vcpu->kvm->lock);
d21225ee
IM		 581 /*
582 * Does the new cr3 value map to physical memory? (Note, we
583 * catch an invalid cr3 even in real-mode, because it would
584 * cause trouble later on when we turn on paging anyway.)
585 *
586 * A real CPU would silently accept an invalid cr3 and would
587 * attempt to use it - with largely undefined (and often hard
588 * to debug) behavior on the guest side.
589 */
590 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
591 inject_gp(vcpu);
fb764416
RR		 592 else {
593 vcpu->cr3 = cr3;
d21225ee 594 vcpu->mmu.new_cr3(vcpu);
fb764416 595 }
11ec2804 596 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 597}
598EXPORT_SYMBOL_GPL(set_cr3);
599
600void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
601{
7075bc81 602 if (cr8 & CR8_RESERVED_BITS) {
6aa8b732
AK		 603 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
604 inject_gp(vcpu);
605 return;
606 }
97222cc8
ED		 607 if (irqchip_in_kernel(vcpu->kvm))
608 kvm_lapic_set_tpr(vcpu, cr8);
609 else
610 vcpu->cr8 = cr8;
6aa8b732
AK		 611}
612EXPORT_SYMBOL_GPL(set_cr8);
613
7017fc3d
ED		 614unsigned long get_cr8(struct kvm_vcpu *vcpu)
615{
97222cc8
ED		 616 if (irqchip_in_kernel(vcpu->kvm))
617 return kvm_lapic_get_cr8(vcpu);
618 else
619 return vcpu->cr8;
7017fc3d
ED		 620}
621EXPORT_SYMBOL_GPL(get_cr8);
622
623u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
624{
97222cc8
ED		 625 if (irqchip_in_kernel(vcpu->kvm))
626 return vcpu->apic_base;
627 else
628 return vcpu->apic_base;
7017fc3d
ED		 629}
630EXPORT_SYMBOL_GPL(kvm_get_apic_base);
631
632void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
633{
97222cc8
ED		 634 /* TODO: reserve bits check */
635 if (irqchip_in_kernel(vcpu->kvm))
636 kvm_lapic_set_base(vcpu, data);
637 else
638 vcpu->apic_base = data;
7017fc3d
ED		 639}
640EXPORT_SYMBOL_GPL(kvm_set_apic_base);
641
6aa8b732
AK		 642void fx_init(struct kvm_vcpu *vcpu)
643{
b114b080 644 unsigned after_mxcsr_mask;
6aa8b732 645
9bd01506
RR		 646 /* Initialize guest FPU by resetting ours and saving into guest's */
647 preempt_disable();
b114b080 648 fx_save(&vcpu->host_fx_image);
6aa8b732 649 fpu_init();
b114b080
RR		 650 fx_save(&vcpu->guest_fx_image);
651 fx_restore(&vcpu->host_fx_image);
9bd01506 652 preempt_enable();
6aa8b732 653
b114b080
RR		 654 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
655 vcpu->guest_fx_image.mxcsr = 0x1f80;
656 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
657 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
6aa8b732
AK		 658}
659EXPORT_SYMBOL_GPL(fx_init);
660
6aa8b732
AK		 661/*
662 * Allocate some memory and give it an address in the guest physical address
663 * space.
664 *
665 * Discontiguous memory is allowed, mostly for framebuffers.
666 */
2c6f5df9
AK		 667static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
668 struct kvm_memory_region *mem)
6aa8b732
AK		 669{
670 int r;
671 gfn_t base_gfn;
672 unsigned long npages;
673 unsigned long i;
674 struct kvm_memory_slot *memslot;
675 struct kvm_memory_slot old, new;
676 int memory_config_version;
677
678 r = -EINVAL;
679 /* General sanity checks */
680 if (mem->memory_size & (PAGE_SIZE - 1))
681 goto out;
682 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
683 goto out;
684 if (mem->slot >= KVM_MEMORY_SLOTS)
685 goto out;
686 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
687 goto out;
688
689 memslot = &kvm->memslots[mem->slot];
690 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
691 npages = mem->memory_size >> PAGE_SHIFT;
692
693 if (!npages)
694 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
695
696raced:
11ec2804 697 mutex_lock(&kvm->lock);
6aa8b732
AK		 698
699 memory_config_version = kvm->memory_config_version;
700 new = old = *memslot;
701
702 new.base_gfn = base_gfn;
703 new.npages = npages;
704 new.flags = mem->flags;
705
706 /* Disallow changing a memory slot's size. */
707 r = -EINVAL;
708 if (npages && old.npages && npages != old.npages)
709 goto out_unlock;
710
711 /* Check for overlaps */
712 r = -EEXIST;
713 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
714 struct kvm_memory_slot *s = &kvm->memslots[i];
715
716 if (s == memslot)
717 continue;
718 if (!((base_gfn + npages <= s->base_gfn) ||
719 (base_gfn >= s->base_gfn + s->npages)))
720 goto out_unlock;
721 }
722 /*
723 * Do memory allocations outside lock. memory_config_version will
724 * detect any races.
725 */
11ec2804 726 mutex_unlock(&kvm->lock);
6aa8b732
AK		 727
728 /* Deallocate if slot is being removed */
729 if (!npages)
8b6d44c7 730 new.phys_mem = NULL;
6aa8b732
AK		 731
732 /* Free page dirty bitmap if unneeded */
733 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 734 new.dirty_bitmap = NULL;
6aa8b732
AK		 735
736 r = -ENOMEM;
737
738 /* Allocate if a slot is being created */
739 if (npages && !new.phys_mem) {
740 new.phys_mem = vmalloc(npages * sizeof(struct page *));
741
742 if (!new.phys_mem)
743 goto out_free;
744
745 memset(new.phys_mem, 0, npages * sizeof(struct page *));
746 for (i = 0; i < npages; ++i) {
747 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
748 | __GFP_ZERO);
749 if (!new.phys_mem[i])
750 goto out_free;
5972e953 751 set_page_private(new.phys_mem[i],0);
6aa8b732
AK		 752 }
753 }
754
755 /* Allocate page dirty bitmap if needed */
756 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
757 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
758
759 new.dirty_bitmap = vmalloc(dirty_bytes);
760 if (!new.dirty_bitmap)
761 goto out_free;
762 memset(new.dirty_bitmap, 0, dirty_bytes);
763 }
764
11ec2804 765 mutex_lock(&kvm->lock);
6aa8b732
AK		 766
767 if (memory_config_version != kvm->memory_config_version) {
11ec2804 768 mutex_unlock(&kvm->lock);
6aa8b732
AK		 769 kvm_free_physmem_slot(&new, &old);
770 goto raced;
771 }
772
773 r = -EAGAIN;
774 if (kvm->busy)
775 goto out_unlock;
776
777 if (mem->slot >= kvm->nmemslots)
778 kvm->nmemslots = mem->slot + 1;
779
780 *memslot = new;
781 ++kvm->memory_config_version;
782
90cb0529
AK		 783 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
784 kvm_flush_remote_tlbs(kvm);
6aa8b732 785
11ec2804 786 mutex_unlock(&kvm->lock);
6aa8b732
AK		 787
788 kvm_free_physmem_slot(&old, &new);
789 return 0;
790
791out_unlock:
11ec2804 792 mutex_unlock(&kvm->lock);
6aa8b732
AK		 793out_free:
794 kvm_free_physmem_slot(&new, &old);
795out:
796 return r;
797}
798
799/*
800 * Get (and clear) the dirty memory log for a memory slot.
801 */
2c6f5df9
AK		 802static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
803 struct kvm_dirty_log *log)
6aa8b732
AK		 804{
805 struct kvm_memory_slot *memslot;
806 int r, i;
807 int n;
808 unsigned long any = 0;
809
11ec2804 810 mutex_lock(&kvm->lock);
6aa8b732
AK		 811
812 /*
813 * Prevent changes to guest memory configuration even while the lock
814 * is not taken.
815 */
816 ++kvm->busy;
11ec2804 817 mutex_unlock(&kvm->lock);
6aa8b732
AK		 818 r = -EINVAL;
819 if (log->slot >= KVM_MEMORY_SLOTS)
820 goto out;
821
822 memslot = &kvm->memslots[log->slot];
823 r = -ENOENT;
824 if (!memslot->dirty_bitmap)
825 goto out;
826
cd1a4a98 827 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 828
cd1a4a98 829 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 830 any = memslot->dirty_bitmap[i];
831
832 r = -EFAULT;
833 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
834 goto out;
835
39214915
RR		 836 /* If nothing is dirty, don't bother messing with page tables. */
837 if (any) {
838 mutex_lock(&kvm->lock);
839 kvm_mmu_slot_remove_write_access(kvm, log->slot);
840 kvm_flush_remote_tlbs(kvm);
841 memset(memslot->dirty_bitmap, 0, n);
842 mutex_unlock(&kvm->lock);
843 }
6aa8b732
AK		 844
845 r = 0;
846
847out:
11ec2804 848 mutex_lock(&kvm->lock);
6aa8b732 849 --kvm->busy;
11ec2804 850 mutex_unlock(&kvm->lock);
6aa8b732
AK		 851 return r;
852}
853
e8207547
AK		 854/*
855 * Set a new alias region. Aliases map a portion of physical memory into
856 * another portion. This is useful for memory windows, for example the PC
857 * VGA region.
858 */
859static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
860 struct kvm_memory_alias *alias)
861{
862 int r, n;
863 struct kvm_mem_alias *p;
864
865 r = -EINVAL;
866 /* General sanity checks */
867 if (alias->memory_size & (PAGE_SIZE - 1))
868 goto out;
869 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
870 goto out;
871 if (alias->slot >= KVM_ALIAS_SLOTS)
872 goto out;
873 if (alias->guest_phys_addr + alias->memory_size
874 < alias->guest_phys_addr)
875 goto out;
876 if (alias->target_phys_addr + alias->memory_size
877 < alias->target_phys_addr)
878 goto out;
879
11ec2804 880 mutex_lock(&kvm->lock);
e8207547
AK		 881
882 p = &kvm->aliases[alias->slot];
883 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
884 p->npages = alias->memory_size >> PAGE_SHIFT;
885 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
886
887 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
888 if (kvm->aliases[n - 1].npages)
889 break;
890 kvm->naliases = n;
891
90cb0529 892 kvm_mmu_zap_all(kvm);
e8207547 893
11ec2804 894 mutex_unlock(&kvm->lock);
e8207547
AK		 895
896 return 0;
897
898out:
899 return r;
900}
901
6ceb9d79
HQ		 902static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
903{
904 int r;
905
906 r = 0;
907 switch (chip->chip_id) {
908 case KVM_IRQCHIP_PIC_MASTER:
909 memcpy (&chip->chip.pic,
910 &pic_irqchip(kvm)->pics[0],
911 sizeof(struct kvm_pic_state));
912 break;
913 case KVM_IRQCHIP_PIC_SLAVE:
914 memcpy (&chip->chip.pic,
915 &pic_irqchip(kvm)->pics[1],
916 sizeof(struct kvm_pic_state));
917 break;
6bf9e962
HQ		 918 case KVM_IRQCHIP_IOAPIC:
919 memcpy (&chip->chip.ioapic,
920 ioapic_irqchip(kvm),
921 sizeof(struct kvm_ioapic_state));
922 break;
6ceb9d79
HQ		 923 default:
924 r = -EINVAL;
925 break;
926 }
927 return r;
928}
929
930static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
931{
932 int r;
933
934 r = 0;
935 switch (chip->chip_id) {
936 case KVM_IRQCHIP_PIC_MASTER:
937 memcpy (&pic_irqchip(kvm)->pics[0],
938 &chip->chip.pic,
939 sizeof(struct kvm_pic_state));
940 break;
941 case KVM_IRQCHIP_PIC_SLAVE:
942 memcpy (&pic_irqchip(kvm)->pics[1],
943 &chip->chip.pic,
944 sizeof(struct kvm_pic_state));
945 break;
6bf9e962
HQ		 946 case KVM_IRQCHIP_IOAPIC:
947 memcpy (ioapic_irqchip(kvm),
948 &chip->chip.ioapic,
949 sizeof(struct kvm_ioapic_state));
950 break;
6ceb9d79
HQ		 951 default:
952 r = -EINVAL;
953 break;
954 }
955 kvm_pic_update_irq(pic_irqchip(kvm));
956 return r;
957}
958
e8207547
AK		 959static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
960{
961 int i;
962 struct kvm_mem_alias *alias;
963
964 for (i = 0; i < kvm->naliases; ++i) {
965 alias = &kvm->aliases[i];
966 if (gfn >= alias->base_gfn
967 && gfn < alias->base_gfn + alias->npages)
968 return alias->target_gfn + gfn - alias->base_gfn;
969 }
970 return gfn;
971}
972
973static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 974{
975 int i;
976
977 for (i = 0; i < kvm->nmemslots; ++i) {
978 struct kvm_memory_slot *memslot = &kvm->memslots[i];
979
980 if (gfn >= memslot->base_gfn
981 && gfn < memslot->base_gfn + memslot->npages)
982 return memslot;
983 }
8b6d44c7 984 return NULL;
6aa8b732 985}
e8207547
AK		 986
987struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
988{
989 gfn = unalias_gfn(kvm, gfn);
990 return __gfn_to_memslot(kvm, gfn);
991}
6aa8b732 992
954bbbc2
AK		 993struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
994{
995 struct kvm_memory_slot *slot;
996
e8207547
AK		 997 gfn = unalias_gfn(kvm, gfn);
998 slot = __gfn_to_memslot(kvm, gfn);
954bbbc2
AK		 999 if (!slot)
1000 return NULL;
1001 return slot->phys_mem[gfn - slot->base_gfn];
1002}
1003EXPORT_SYMBOL_GPL(gfn_to_page);
1004
7e9d619d 1005/* WARNING: Does not work on aliased pages. */
6aa8b732
AK		 1006void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
1007{
31389947 1008 struct kvm_memory_slot *memslot;
6aa8b732 1009
7e9d619d
RR		 1010 memslot = __gfn_to_memslot(kvm, gfn);
1011 if (memslot && memslot->dirty_bitmap) {
1012 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 1013
7e9d619d
RR		 1014 /* avoid RMW */
1015 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
1016 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 1017 }
1018}
1019
e7d5d76c 1020int emulator_read_std(unsigned long addr,
4c690a1e 1021 void *val,
6aa8b732 1022 unsigned int bytes,
cebff02b 1023 struct kvm_vcpu *vcpu)
6aa8b732 1024{
6aa8b732
AK		 1025 void *data = val;
1026
1027 while (bytes) {
1028 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1029 unsigned offset = addr & (PAGE_SIZE-1);
1030 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
1031 unsigned long pfn;
954bbbc2
AK		 1032 struct page *page;
1033 void *page_virt;
6aa8b732
AK		 1034
1035 if (gpa == UNMAPPED_GVA)
1036 return X86EMUL_PROPAGATE_FAULT;
1037 pfn = gpa >> PAGE_SHIFT;
954bbbc2
AK		 1038 page = gfn_to_page(vcpu->kvm, pfn);
1039 if (!page)
6aa8b732 1040 return X86EMUL_UNHANDLEABLE;
954bbbc2 1041 page_virt = kmap_atomic(page, KM_USER0);
6aa8b732 1042
954bbbc2 1043 memcpy(data, page_virt + offset, tocopy);
6aa8b732 1044
954bbbc2 1045 kunmap_atomic(page_virt, KM_USER0);
6aa8b732
AK		 1046
1047 bytes -= tocopy;
1048 data += tocopy;
1049 addr += tocopy;
1050 }
1051
1052 return X86EMUL_CONTINUE;
1053}
e7d5d76c 1054EXPORT_SYMBOL_GPL(emulator_read_std);
6aa8b732
AK		 1055
1056static int emulator_write_std(unsigned long addr,
4c690a1e 1057 const void *val,
6aa8b732 1058 unsigned int bytes,
cebff02b 1059 struct kvm_vcpu *vcpu)
6aa8b732 1060{
f0242478 1061 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
6aa8b732
AK		 1062 return X86EMUL_UNHANDLEABLE;
1063}
1064
97222cc8
ED		 1065/*
1066 * Only apic need an MMIO device hook, so shortcut now..
1067 */
1068static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1069 gpa_t addr)
1070{
1071 struct kvm_io_device *dev;
1072
1073 if (vcpu->apic) {
1074 dev = &vcpu->apic->dev;
1075 if (dev->in_range(dev, addr))
1076 return dev;
1077 }
1078 return NULL;
1079}
1080
2eeb2e94
GH		 1081static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1082 gpa_t addr)
1083{
97222cc8
ED		 1084 struct kvm_io_device *dev;
1085
1086 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1087 if (dev == NULL)
1088 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1089 return dev;
2eeb2e94
GH		 1090}
1091
74906345
ED		 1092static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1093 gpa_t addr)
1094{
1095 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1096}
1097
6aa8b732 1098static int emulator_read_emulated(unsigned long addr,
4c690a1e 1099 void *val,
6aa8b732 1100 unsigned int bytes,
cebff02b 1101 struct kvm_vcpu *vcpu)
6aa8b732 1102{
2eeb2e94
GH		 1103 struct kvm_io_device *mmio_dev;
1104 gpa_t gpa;
6aa8b732
AK		 1105
1106 if (vcpu->mmio_read_completed) {
1107 memcpy(val, vcpu->mmio_data, bytes);
1108 vcpu->mmio_read_completed = 0;
1109 return X86EMUL_CONTINUE;
cebff02b 1110 } else if (emulator_read_std(addr, val, bytes, vcpu)
6aa8b732
AK		 1111 == X86EMUL_CONTINUE)
1112 return X86EMUL_CONTINUE;
d27d4aca 1113
2eeb2e94
GH		 1114 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1115 if (gpa == UNMAPPED_GVA)
1116 return X86EMUL_PROPAGATE_FAULT;
6aa8b732 1117
2eeb2e94
GH		 1118 /*
1119 * Is this MMIO handled locally?
1120 */
1121 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1122 if (mmio_dev) {
1123 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1124 return X86EMUL_CONTINUE;
6aa8b732 1125 }
2eeb2e94
GH		 1126
1127 vcpu->mmio_needed = 1;
1128 vcpu->mmio_phys_addr = gpa;
1129 vcpu->mmio_size = bytes;
1130 vcpu->mmio_is_write = 0;
1131
1132 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1133}
1134
da4a00f0 1135static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
4c690a1e 1136 const void *val, int bytes)
da4a00f0 1137{
da4a00f0
AK		 1138 struct page *page;
1139 void *virt;
1140
1141 if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
1142 return 0;
954bbbc2
AK		 1143 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1144 if (!page)
da4a00f0 1145 return 0;
ab51a434 1146 mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
da4a00f0 1147 virt = kmap_atomic(page, KM_USER0);
fe551881 1148 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
7cfa4b0a 1149 memcpy(virt + offset_in_page(gpa), val, bytes);
da4a00f0 1150 kunmap_atomic(virt, KM_USER0);
da4a00f0
AK		 1151 return 1;
1152}
1153
b0fcd903
AK		 1154static int emulator_write_emulated_onepage(unsigned long addr,
1155 const void *val,
1156 unsigned int bytes,
cebff02b 1157 struct kvm_vcpu *vcpu)
6aa8b732 1158{
2eeb2e94
GH		 1159 struct kvm_io_device *mmio_dev;
1160 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
6aa8b732 1161
c9047f53
AK		 1162 if (gpa == UNMAPPED_GVA) {
1163 kvm_arch_ops->inject_page_fault(vcpu, addr, 2);
6aa8b732 1164 return X86EMUL_PROPAGATE_FAULT;
c9047f53 1165 }
6aa8b732 1166
da4a00f0
AK		 1167 if (emulator_write_phys(vcpu, gpa, val, bytes))
1168 return X86EMUL_CONTINUE;
1169
2eeb2e94
GH		 1170 /*
1171 * Is this MMIO handled locally?
1172 */
1173 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1174 if (mmio_dev) {
1175 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1176 return X86EMUL_CONTINUE;
1177 }
1178
6aa8b732
AK		 1179 vcpu->mmio_needed = 1;
1180 vcpu->mmio_phys_addr = gpa;
1181 vcpu->mmio_size = bytes;
1182 vcpu->mmio_is_write = 1;
4c690a1e 1183 memcpy(vcpu->mmio_data, val, bytes);
6aa8b732
AK		 1184
1185 return X86EMUL_CONTINUE;
1186}
1187
e7d5d76c 1188int emulator_write_emulated(unsigned long addr,
b0fcd903
AK		 1189 const void *val,
1190 unsigned int bytes,
cebff02b 1191 struct kvm_vcpu *vcpu)
b0fcd903
AK		 1192{
1193 /* Crossing a page boundary? */
1194 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1195 int rc, now;
1196
1197 now = -addr & ~PAGE_MASK;
cebff02b 1198 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
b0fcd903
AK		 1199 if (rc != X86EMUL_CONTINUE)
1200 return rc;
1201 addr += now;
1202 val += now;
1203 bytes -= now;
1204 }
cebff02b 1205 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
b0fcd903 1206}
e7d5d76c 1207EXPORT_SYMBOL_GPL(emulator_write_emulated);
b0fcd903 1208
6aa8b732 1209static int emulator_cmpxchg_emulated(unsigned long addr,
4c690a1e
AK		 1210 const void *old,
1211 const void *new,
6aa8b732 1212 unsigned int bytes,
cebff02b 1213 struct kvm_vcpu *vcpu)
6aa8b732
AK		 1214{
1215 static int reported;
1216
1217 if (!reported) {
1218 reported = 1;
1219 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1220 }
cebff02b 1221 return emulator_write_emulated(addr, new, bytes, vcpu);
6aa8b732
AK		 1222}
1223
1224static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1225{
1226 return kvm_arch_ops->get_segment_base(vcpu, seg);
1227}
1228
1229int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1230{
6aa8b732
AK		 1231 return X86EMUL_CONTINUE;
1232}
1233
1234int emulate_clts(struct kvm_vcpu *vcpu)
1235{
399badf3 1236 unsigned long cr0;
6aa8b732 1237
707d92fa 1238 cr0 = vcpu->cr0 & ~X86_CR0_TS;
6aa8b732
AK		 1239 kvm_arch_ops->set_cr0(vcpu, cr0);
1240 return X86EMUL_CONTINUE;
1241}
1242
1243int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
1244{
1245 struct kvm_vcpu *vcpu = ctxt->vcpu;
1246
1247 switch (dr) {
1248 case 0 ... 3:
1249 *dest = kvm_arch_ops->get_dr(vcpu, dr);
1250 return X86EMUL_CONTINUE;
1251 default:
f0242478 1252 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
6aa8b732
AK		 1253 return X86EMUL_UNHANDLEABLE;
1254 }
1255}
1256
1257int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1258{
1259 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1260 int exception;
1261
1262 kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1263 if (exception) {
1264 /* FIXME: better handling */
1265 return X86EMUL_UNHANDLEABLE;
1266 }
1267 return X86EMUL_CONTINUE;
1268}
1269
1270static void report_emulation_failure(struct x86_emulate_ctxt *ctxt)
1271{
1272 static int reported;
1273 u8 opcodes[4];
1274 unsigned long rip = ctxt->vcpu->rip;
1275 unsigned long rip_linear;
1276
1277 rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS);
1278
1279 if (reported)
1280 return;
1281
cebff02b 1282 emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt->vcpu);
6aa8b732
AK		 1283
1284 printk(KERN_ERR "emulation failed but !mmio_needed?"
1285 " rip %lx %02x %02x %02x %02x\n",
1286 rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1287 reported = 1;
1288}
1289
1290struct x86_emulate_ops emulate_ops = {
1291 .read_std = emulator_read_std,
1292 .write_std = emulator_write_std,
1293 .read_emulated = emulator_read_emulated,
1294 .write_emulated = emulator_write_emulated,
1295 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1296};
1297
1298int emulate_instruction(struct kvm_vcpu *vcpu,
1299 struct kvm_run *run,
1300 unsigned long cr2,
1301 u16 error_code)
1302{
1303 struct x86_emulate_ctxt emulate_ctxt;
1304 int r;
1305 int cs_db, cs_l;
1306
e7df56e4 1307 vcpu->mmio_fault_cr2 = cr2;
6aa8b732
AK		 1308 kvm_arch_ops->cache_regs(vcpu);
1309
1310 kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1311
1312 emulate_ctxt.vcpu = vcpu;
1313 emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu);
1314 emulate_ctxt.cr2 = cr2;
1315 emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM)
1316 ? X86EMUL_MODE_REAL : cs_l
1317 ? X86EMUL_MODE_PROT64 : cs_db
1318 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1319
1320 if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1321 emulate_ctxt.cs_base = 0;
1322 emulate_ctxt.ds_base = 0;
1323 emulate_ctxt.es_base = 0;
1324 emulate_ctxt.ss_base = 0;
1325 } else {
1326 emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS);
1327 emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS);
1328 emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES);
1329 emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS);
1330 }
1331
1332 emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS);
1333 emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS);
1334
1335 vcpu->mmio_is_write = 0;
e70669ab 1336 vcpu->pio.string = 0;
6aa8b732 1337 r = x86_emulate_memop(&emulate_ctxt, &emulate_ops);
e70669ab
LV		 1338 if (vcpu->pio.string)
1339 return EMULATE_DO_MMIO;
6aa8b732
AK		 1340
1341 if ((r || vcpu->mmio_is_write) && run) {
8fc0d085 1342 run->exit_reason = KVM_EXIT_MMIO;
6aa8b732
AK		 1343 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1344 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1345 run->mmio.len = vcpu->mmio_size;
1346 run->mmio.is_write = vcpu->mmio_is_write;
1347 }
1348
1349 if (r) {
a436036b
AK		 1350 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1351 return EMULATE_DONE;
6aa8b732
AK		 1352 if (!vcpu->mmio_needed) {
1353 report_emulation_failure(&emulate_ctxt);
1354 return EMULATE_FAIL;
1355 }
1356 return EMULATE_DO_MMIO;
1357 }
1358
1359 kvm_arch_ops->decache_regs(vcpu);
1360 kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags);
1361
02c83209
AK		 1362 if (vcpu->mmio_is_write) {
1363 vcpu->mmio_needed = 0;
6aa8b732 1364 return EMULATE_DO_MMIO;
02c83209 1365 }
6aa8b732
AK		 1366
1367 return EMULATE_DONE;
1368}
1369EXPORT_SYMBOL_GPL(emulate_instruction);
1370
b6958ce4
ED		 1371/*
1372 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1373 */
1374static void kvm_vcpu_kernel_halt(struct kvm_vcpu *vcpu)
d3bef15f 1375{
b6958ce4
ED		 1376 DECLARE_WAITQUEUE(wait, current);
1377
1378 add_wait_queue(&vcpu->wq, &wait);
1379
1380 /*
1381 * We will block until either an interrupt or a signal wakes us up
1382 */
1383 while(!(irqchip_in_kernel(vcpu->kvm) && kvm_cpu_has_interrupt(vcpu))
1384 && !vcpu->irq_summary
1385 && !signal_pending(current)) {
1386 set_current_state(TASK_INTERRUPTIBLE);
1387 vcpu_put(vcpu);
1388 schedule();
1389 vcpu_load(vcpu);
1390 }
d3bef15f 1391
b6958ce4
ED		 1392 remove_wait_queue(&vcpu->wq, &wait);
1393 set_current_state(TASK_RUNNING);
1394}
1395
1396int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1397{
d3bef15f 1398 ++vcpu->stat.halt_exits;
b6958ce4
ED		 1399 if (irqchip_in_kernel(vcpu->kvm)) {
1400 kvm_vcpu_kernel_halt(vcpu);
1401 return 1;
1402 } else {
1403 vcpu->run->exit_reason = KVM_EXIT_HLT;
1404 return 0;
1405 }
d3bef15f
AK		 1406}
1407EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1408
270fd9b9
AK		 1409int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
1410{
1411 unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
1412
9b22bf57 1413 kvm_arch_ops->cache_regs(vcpu);
270fd9b9
AK		 1414 ret = -KVM_EINVAL;
1415#ifdef CONFIG_X86_64
1416 if (is_long_mode(vcpu)) {
1417 nr = vcpu->regs[VCPU_REGS_RAX];
1418 a0 = vcpu->regs[VCPU_REGS_RDI];
1419 a1 = vcpu->regs[VCPU_REGS_RSI];
1420 a2 = vcpu->regs[VCPU_REGS_RDX];
1421 a3 = vcpu->regs[VCPU_REGS_RCX];
1422 a4 = vcpu->regs[VCPU_REGS_R8];
1423 a5 = vcpu->regs[VCPU_REGS_R9];
1424 } else
1425#endif
1426 {
1427 nr = vcpu->regs[VCPU_REGS_RBX] & -1u;
1428 a0 = vcpu->regs[VCPU_REGS_RAX] & -1u;
1429 a1 = vcpu->regs[VCPU_REGS_RCX] & -1u;
1430 a2 = vcpu->regs[VCPU_REGS_RDX] & -1u;
1431 a3 = vcpu->regs[VCPU_REGS_RSI] & -1u;
1432 a4 = vcpu->regs[VCPU_REGS_RDI] & -1u;
1433 a5 = vcpu->regs[VCPU_REGS_RBP] & -1u;
1434 }
1435 switch (nr) {
1436 default:
519ef353 1437 run->hypercall.nr = nr;
b4e63f56
AK		 1438 run->hypercall.args[0] = a0;
1439 run->hypercall.args[1] = a1;
1440 run->hypercall.args[2] = a2;
1441 run->hypercall.args[3] = a3;
1442 run->hypercall.args[4] = a4;
1443 run->hypercall.args[5] = a5;
1444 run->hypercall.ret = ret;
1445 run->hypercall.longmode = is_long_mode(vcpu);
1446 kvm_arch_ops->decache_regs(vcpu);
1447 return 0;
270fd9b9
AK		 1448 }
1449 vcpu->regs[VCPU_REGS_RAX] = ret;
9b22bf57 1450 kvm_arch_ops->decache_regs(vcpu);
270fd9b9
AK		 1451 return 1;
1452}
1453EXPORT_SYMBOL_GPL(kvm_hypercall);
1454
6aa8b732
AK		 1455static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1456{
1457 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1458}
1459
1460void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1461{
1462 struct descriptor_table dt = { limit, base };
1463
1464 kvm_arch_ops->set_gdt(vcpu, &dt);
1465}
1466
1467void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1468{
1469 struct descriptor_table dt = { limit, base };
1470
1471 kvm_arch_ops->set_idt(vcpu, &dt);
1472}
1473
1474void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1475 unsigned long *rflags)
1476{
1477 lmsw(vcpu, msw);
1478 *rflags = kvm_arch_ops->get_rflags(vcpu);
1479}
1480
1481unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1482{
25c4c276 1483 kvm_arch_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 1484 switch (cr) {
1485 case 0:
1486 return vcpu->cr0;
1487 case 2:
1488 return vcpu->cr2;
1489 case 3:
1490 return vcpu->cr3;
1491 case 4:
1492 return vcpu->cr4;
1493 default:
1494 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1495 return 0;
1496 }
1497}
1498
1499void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1500 unsigned long *rflags)
1501{
1502 switch (cr) {
1503 case 0:
1504 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
1505 *rflags = kvm_arch_ops->get_rflags(vcpu);
1506 break;
1507 case 2:
1508 vcpu->cr2 = val;
1509 break;
1510 case 3:
1511 set_cr3(vcpu, val);
1512 break;
1513 case 4:
1514 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1515 break;
1516 default:
1517 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1518 }
1519}
1520
102d8325
IM		 1521/*
1522 * Register the para guest with the host:
1523 */
1524static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa)
1525{
1526 struct kvm_vcpu_para_state *para_state;
1527 hpa_t para_state_hpa, hypercall_hpa;
1528 struct page *para_state_page;
1529 unsigned char *hypercall;
1530 gpa_t hypercall_gpa;
1531
1532 printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n");
1533 printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa);
1534
1535 /*
1536 * Needs to be page aligned:
1537 */
1538 if (para_state_gpa != PAGE_ALIGN(para_state_gpa))
1539 goto err_gp;
1540
1541 para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa);
1542 printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa);
1543 if (is_error_hpa(para_state_hpa))
1544 goto err_gp;
1545
ab51a434 1546 mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT);
102d8325 1547 para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT);
fe551881 1548 para_state = kmap(para_state_page);
102d8325
IM		 1549
1550 printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version);
1551 printk(KERN_DEBUG ".... size: %d\n", para_state->size);
1552
1553 para_state->host_version = KVM_PARA_API_VERSION;
1554 /*
1555 * We cannot support guests that try to register themselves
1556 * with a newer API version than the host supports:
1557 */
1558 if (para_state->guest_version > KVM_PARA_API_VERSION) {
1559 para_state->ret = -KVM_EINVAL;
1560 goto err_kunmap_skip;
1561 }
1562
1563 hypercall_gpa = para_state->hypercall_gpa;
1564 hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa);
1565 printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa);
1566 if (is_error_hpa(hypercall_hpa)) {
1567 para_state->ret = -KVM_EINVAL;
1568 goto err_kunmap_skip;
1569 }
1570
1571 printk(KERN_DEBUG "kvm: para guest successfully registered.\n");
1572 vcpu->para_state_page = para_state_page;
1573 vcpu->para_state_gpa = para_state_gpa;
1574 vcpu->hypercall_gpa = hypercall_gpa;
1575
ab51a434 1576 mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT);
102d8325
IM		 1577 hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT),
1578 KM_USER1) + (hypercall_hpa & ~PAGE_MASK);
1579 kvm_arch_ops->patch_hypercall(vcpu, hypercall);
1580 kunmap_atomic(hypercall, KM_USER1);
1581
1582 para_state->ret = 0;
1583err_kunmap_skip:
fe551881 1584 kunmap(para_state_page);
102d8325
IM		 1585 return 0;
1586err_gp:
1587 return 1;
1588}
1589
3bab1f5d
AK		 1590int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1591{
1592 u64 data;
1593
1594 switch (msr) {
1595 case 0xc0010010: /* SYSCFG */
1596 case 0xc0010015: /* HWCR */
1597 case MSR_IA32_PLATFORM_ID:
1598 case MSR_IA32_P5_MC_ADDR:
1599 case MSR_IA32_P5_MC_TYPE:
1600 case MSR_IA32_MC0_CTL:
1601 case MSR_IA32_MCG_STATUS:
1602 case MSR_IA32_MCG_CAP:
1603 case MSR_IA32_MC0_MISC:
1604 case MSR_IA32_MC0_MISC+4:
1605 case MSR_IA32_MC0_MISC+8:
1606 case MSR_IA32_MC0_MISC+12:
1607 case MSR_IA32_MC0_MISC+16:
1608 case MSR_IA32_UCODE_REV:
a8d13ea2 1609 case MSR_IA32_PERF_STATUS:
2dc7094b 1610 case MSR_IA32_EBL_CR_POWERON:
3bab1f5d
AK		 1611 /* MTRR registers */
1612 case 0xfe:
1613 case 0x200 ... 0x2ff:
1614 data = 0;
1615 break;
a8d13ea2
AK		 1616 case 0xcd: /* fsb frequency */
1617 data = 3;
1618 break;
3bab1f5d 1619 case MSR_IA32_APICBASE:
7017fc3d 1620 data = kvm_get_apic_base(vcpu);
3bab1f5d 1621 break;
6f00e68f
AK		 1622 case MSR_IA32_MISC_ENABLE:
1623 data = vcpu->ia32_misc_enable_msr;
1624 break;
3bab1f5d
AK		 1625#ifdef CONFIG_X86_64
1626 case MSR_EFER:
1627 data = vcpu->shadow_efer;
1628 break;
1629#endif
1630 default:
f0242478 1631 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
3bab1f5d
AK		 1632 return 1;
1633 }
1634 *pdata = data;
1635 return 0;
1636}
1637EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1638
6aa8b732
AK		 1639/*
1640 * Reads an msr value (of 'msr_index') into 'pdata'.
1641 * Returns 0 on success, non-0 otherwise.
1642 * Assumes vcpu_load() was already called.
1643 */
35f3f286 1644int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
6aa8b732
AK		 1645{
1646 return kvm_arch_ops->get_msr(vcpu, msr_index, pdata);
1647}
1648
05b3e0c2 1649#ifdef CONFIG_X86_64
6aa8b732 1650
3bab1f5d 1651static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1652{
6aa8b732
AK		 1653 if (efer & EFER_RESERVED_BITS) {
1654 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1655 efer);
1656 inject_gp(vcpu);
1657 return;
1658 }
1659
1660 if (is_paging(vcpu)
1661 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1662 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1663 inject_gp(vcpu);
1664 return;
1665 }
1666
7725f0ba
AK		 1667 kvm_arch_ops->set_efer(vcpu, efer);
1668
6aa8b732
AK		 1669 efer &= ~EFER_LMA;
1670 efer |= vcpu->shadow_efer & EFER_LMA;
1671
1672 vcpu->shadow_efer = efer;
6aa8b732 1673}
6aa8b732
AK		 1674
1675#endif
1676
3bab1f5d
AK		 1677int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1678{
1679 switch (msr) {
1680#ifdef CONFIG_X86_64
1681 case MSR_EFER:
1682 set_efer(vcpu, data);
1683 break;
1684#endif
1685 case MSR_IA32_MC0_STATUS:
f0242478 1686 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
3bab1f5d
AK		 1687 __FUNCTION__, data);
1688 break;
0e5bf0d0 1689 case MSR_IA32_MCG_STATUS:
f0242478 1690 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
0e5bf0d0
SK		 1691 __FUNCTION__, data);
1692 break;
3bab1f5d
AK		 1693 case MSR_IA32_UCODE_REV:
1694 case MSR_IA32_UCODE_WRITE:
1695 case 0x200 ... 0x2ff: /* MTRRs */
1696 break;
1697 case MSR_IA32_APICBASE:
7017fc3d 1698 kvm_set_apic_base(vcpu, data);
3bab1f5d 1699 break;
6f00e68f
AK		 1700 case MSR_IA32_MISC_ENABLE:
1701 vcpu->ia32_misc_enable_msr = data;
1702 break;
102d8325
IM		 1703 /*
1704 * This is the 'probe whether the host is KVM' logic:
1705 */
1706 case MSR_KVM_API_MAGIC:
1707 return vcpu_register_para(vcpu, data);
1708
3bab1f5d 1709 default:
f0242478 1710 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
3bab1f5d
AK		 1711 return 1;
1712 }
1713 return 0;
1714}
1715EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1716
6aa8b732
AK		 1717/*
1718 * Writes msr value into into the appropriate "register".
1719 * Returns 0 on success, non-0 otherwise.
1720 * Assumes vcpu_load() was already called.
1721 */
35f3f286 1722int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
6aa8b732
AK		 1723{
1724 return kvm_arch_ops->set_msr(vcpu, msr_index, data);
1725}
1726
1727void kvm_resched(struct kvm_vcpu *vcpu)
1728{
3fca0365
YD		 1729 if (!need_resched())
1730 return;
6aa8b732 1731 cond_resched();
6aa8b732
AK		 1732}
1733EXPORT_SYMBOL_GPL(kvm_resched);
1734
06465c5a
AK		 1735void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1736{
1737 int i;
1738 u32 function;
1739 struct kvm_cpuid_entry *e, *best;
1740
1741 kvm_arch_ops->cache_regs(vcpu);
1742 function = vcpu->regs[VCPU_REGS_RAX];
1743 vcpu->regs[VCPU_REGS_RAX] = 0;
1744 vcpu->regs[VCPU_REGS_RBX] = 0;
1745 vcpu->regs[VCPU_REGS_RCX] = 0;
1746 vcpu->regs[VCPU_REGS_RDX] = 0;
1747 best = NULL;
1748 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1749 e = &vcpu->cpuid_entries[i];
1750 if (e->function == function) {
1751 best = e;
1752 break;
1753 }
1754 /*
1755 * Both basic or both extended?
1756 */
1757 if (((e->function ^ function) & 0x80000000) == 0)
1758 if (!best || e->function > best->function)
1759 best = e;
1760 }
1761 if (best) {
1762 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1763 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1764 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1765 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1766 }
1767 kvm_arch_ops->decache_regs(vcpu);
1768 kvm_arch_ops->skip_emulated_instruction(vcpu);
1769}
1770EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1771
039576c0 1772static int pio_copy_data(struct kvm_vcpu *vcpu)
46fc1477 1773{
039576c0
AK		 1774 void *p = vcpu->pio_data;
1775 void *q;
1776 unsigned bytes;
1777 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1778
039576c0
AK		 1779 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1780 PAGE_KERNEL);
1781 if (!q) {
039576c0
AK		 1782 free_pio_guest_pages(vcpu);
1783 return -ENOMEM;
1784 }
1785 q += vcpu->pio.guest_page_offset;
1786 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1787 if (vcpu->pio.in)
1788 memcpy(q, p, bytes);
1789 else
1790 memcpy(p, q, bytes);
1791 q -= vcpu->pio.guest_page_offset;
1792 vunmap(q);
039576c0
AK		 1793 free_pio_guest_pages(vcpu);
1794 return 0;
1795}
1796
1797static int complete_pio(struct kvm_vcpu *vcpu)
1798{
1799 struct kvm_pio_request *io = &vcpu->pio;
46fc1477 1800 long delta;
039576c0 1801 int r;
46fc1477
AK		 1802
1803 kvm_arch_ops->cache_regs(vcpu);
1804
1805 if (!io->string) {
039576c0
AK		 1806 if (io->in)
1807 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
46fc1477
AK		 1808 io->size);
1809 } else {
039576c0
AK		 1810 if (io->in) {
1811 r = pio_copy_data(vcpu);
1812 if (r) {
1813 kvm_arch_ops->cache_regs(vcpu);
1814 return r;
1815 }
1816 }
1817
46fc1477
AK		 1818 delta = 1;
1819 if (io->rep) {
039576c0 1820 delta *= io->cur_count;
46fc1477
AK		 1821 /*
1822 * The size of the register should really depend on
1823 * current address size.
1824 */
1825 vcpu->regs[VCPU_REGS_RCX] -= delta;
1826 }
039576c0 1827 if (io->down)
46fc1477
AK		 1828 delta = -delta;
1829 delta *= io->size;
039576c0 1830 if (io->in)
46fc1477
AK		 1831 vcpu->regs[VCPU_REGS_RDI] += delta;
1832 else
1833 vcpu->regs[VCPU_REGS_RSI] += delta;
1834 }
1835
46fc1477
AK		 1836 kvm_arch_ops->decache_regs(vcpu);
1837
039576c0
AK		 1838 io->count -= io->cur_count;
1839 io->cur_count = 0;
1840
1841 if (!io->count)
1842 kvm_arch_ops->skip_emulated_instruction(vcpu);
1843 return 0;
46fc1477
AK		 1844}
1845
65619eb5
ED		 1846static void kernel_pio(struct kvm_io_device *pio_dev,
1847 struct kvm_vcpu *vcpu,
1848 void *pd)
74906345
ED		 1849{
1850 /* TODO: String I/O for in kernel device */
1851
9cf98828 1852 mutex_lock(&vcpu->kvm->lock);
74906345
ED		 1853 if (vcpu->pio.in)
1854 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1855 vcpu->pio.size,
65619eb5 1856 pd);
74906345
ED		 1857 else
1858 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1859 vcpu->pio.size,
65619eb5 1860 pd);
9cf98828 1861 mutex_unlock(&vcpu->kvm->lock);
65619eb5
ED		 1862}
1863
1864static void pio_string_write(struct kvm_io_device *pio_dev,
1865 struct kvm_vcpu *vcpu)
1866{
1867 struct kvm_pio_request *io = &vcpu->pio;
1868 void *pd = vcpu->pio_data;
1869 int i;
1870
9cf98828 1871 mutex_lock(&vcpu->kvm->lock);
65619eb5
ED		 1872 for (i = 0; i < io->cur_count; i++) {
1873 kvm_iodevice_write(pio_dev, io->port,
1874 io->size,
1875 pd);
1876 pd += io->size;
1877 }
9cf98828 1878 mutex_unlock(&vcpu->kvm->lock);
74906345
ED		 1879}
1880
3090dd73
LV		 1881int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1882 int size, unsigned port)
1883{
1884 struct kvm_io_device *pio_dev;
1885
1886 vcpu->run->exit_reason = KVM_EXIT_IO;
1887 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1888 vcpu->run->io.size = vcpu->pio.size = size;
1889 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1890 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1891 vcpu->run->io.port = vcpu->pio.port = port;
1892 vcpu->pio.in = in;
1893 vcpu->pio.string = 0;
1894 vcpu->pio.down = 0;
1895 vcpu->pio.guest_page_offset = 0;
1896 vcpu->pio.rep = 0;
1897
1898 kvm_arch_ops->cache_regs(vcpu);
1899 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
1900 kvm_arch_ops->decache_regs(vcpu);
1901
1902 pio_dev = vcpu_find_pio_dev(vcpu, port);
1903 if (pio_dev) {
1904 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1905 complete_pio(vcpu);
1906 return 1;
1907 }
1908 return 0;
1909}
1910EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1911
1912int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1913 int size, unsigned long count, int down,
039576c0
AK		 1914 gva_t address, int rep, unsigned port)
1915{
1916 unsigned now, in_page;
65619eb5 1917 int i, ret = 0;
039576c0
AK		 1918 int nr_pages = 1;
1919 struct page *page;
74906345 1920 struct kvm_io_device *pio_dev;
039576c0
AK		 1921
1922 vcpu->run->exit_reason = KVM_EXIT_IO;
1923 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3090dd73 1924 vcpu->run->io.size = vcpu->pio.size = size;
039576c0 1925 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3090dd73
LV		 1926 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1927 vcpu->run->io.port = vcpu->pio.port = port;
039576c0 1928 vcpu->pio.in = in;
3090dd73 1929 vcpu->pio.string = 1;
039576c0
AK		 1930 vcpu->pio.down = down;
1931 vcpu->pio.guest_page_offset = offset_in_page(address);
1932 vcpu->pio.rep = rep;
1933
039576c0
AK		 1934 if (!count) {
1935 kvm_arch_ops->skip_emulated_instruction(vcpu);
1936 return 1;
1937 }
1938
039576c0
AK		 1939 if (!down)
1940 in_page = PAGE_SIZE - offset_in_page(address);
1941 else
1942 in_page = offset_in_page(address) + size;
1943 now = min(count, (unsigned long)in_page / size);
1944 if (!now) {
1945 /*
1946 * String I/O straddles page boundary. Pin two guest pages
1947 * so that we satisfy atomicity constraints. Do just one
1948 * transaction to avoid complexity.
1949 */
1950 nr_pages = 2;
1951 now = 1;
1952 }
1953 if (down) {
1954 /*
1955 * String I/O in reverse. Yuck. Kill the guest, fix later.
1956 */
f0242478 1957 pr_unimpl(vcpu, "guest string pio down\n");
039576c0
AK		 1958 inject_gp(vcpu);
1959 return 1;
1960 }
1961 vcpu->run->io.count = now;
1962 vcpu->pio.cur_count = now;
1963
1964 for (i = 0; i < nr_pages; ++i) {
11ec2804 1965 mutex_lock(&vcpu->kvm->lock);
039576c0
AK		 1966 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1967 if (page)
1968 get_page(page);
1969 vcpu->pio.guest_pages[i] = page;
11ec2804 1970 mutex_unlock(&vcpu->kvm->lock);
039576c0
AK		 1971 if (!page) {
1972 inject_gp(vcpu);
1973 free_pio_guest_pages(vcpu);
1974 return 1;
1975 }
1976 }
1977
3090dd73 1978 pio_dev = vcpu_find_pio_dev(vcpu, port);
65619eb5
ED		 1979 if (!vcpu->pio.in) {
1980 /* string PIO write */
1981 ret = pio_copy_data(vcpu);
1982 if (ret >= 0 && pio_dev) {
1983 pio_string_write(pio_dev, vcpu);
1984 complete_pio(vcpu);
1985 if (vcpu->pio.count == 0)
1986 ret = 1;
1987 }
1988 } else if (pio_dev)
f0242478 1989 pr_unimpl(vcpu, "no string pio read support yet, "
65619eb5
ED		 1990 "port %x size %d count %ld\n",
1991 port, size, count);
1992
1993 return ret;
039576c0 1994}
3090dd73 1995EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
039576c0 1996
bccf2150 1997static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 1998{
6aa8b732 1999 int r;
1961d276 2000 sigset_t sigsaved;
6aa8b732 2001
bccf2150 2002 vcpu_load(vcpu);
6aa8b732 2003
1961d276
AK		 2004 if (vcpu->sigset_active)
2005 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2006
54810342 2007 /* re-sync apic's tpr */
5cd4f6fd
HQ		 2008 if (!irqchip_in_kernel(vcpu->kvm))
2009 set_cr8(vcpu, kvm_run->cr8);
54810342 2010
02c83209
AK		 2011 if (vcpu->pio.cur_count) {
2012 r = complete_pio(vcpu);
2013 if (r)
2014 goto out;
2015 }
2016
2017 if (vcpu->mmio_needed) {
2018 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2019 vcpu->mmio_read_completed = 1;
2020 vcpu->mmio_needed = 0;
2021 r = emulate_instruction(vcpu, kvm_run,
2022 vcpu->mmio_fault_cr2, 0);
2023 if (r == EMULATE_DO_MMIO) {
2024 /*
2025 * Read-modify-write. Back to userspace.
2026 */
02c83209
AK		 2027 r = 0;
2028 goto out;
46fc1477 2029 }
6aa8b732
AK		 2030 }
2031
8eb7d334 2032 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
b4e63f56
AK		 2033 kvm_arch_ops->cache_regs(vcpu);
2034 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
2035 kvm_arch_ops->decache_regs(vcpu);
2036 }
2037
6aa8b732
AK		 2038 r = kvm_arch_ops->run(vcpu, kvm_run);
2039
039576c0 2040out:
1961d276
AK		 2041 if (vcpu->sigset_active)
2042 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2043
6aa8b732
AK		 2044 vcpu_put(vcpu);
2045 return r;
2046}
2047
bccf2150
AK		 2048static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2049 struct kvm_regs *regs)
6aa8b732 2050{
bccf2150 2051 vcpu_load(vcpu);
6aa8b732
AK		 2052
2053 kvm_arch_ops->cache_regs(vcpu);
2054
2055 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2056 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2057 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2058 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2059 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2060 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2061 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2062 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 2063#ifdef CONFIG_X86_64
6aa8b732
AK		 2064 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2065 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2066 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2067 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2068 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2069 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2070 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2071 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2072#endif
2073
2074 regs->rip = vcpu->rip;
2075 regs->rflags = kvm_arch_ops->get_rflags(vcpu);
2076
2077 /*
2078 * Don't leak debug flags in case they were set for guest debugging
2079 */
2080 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2081 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2082
2083 vcpu_put(vcpu);
2084
2085 return 0;
2086}
2087
bccf2150
AK		 2088static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2089 struct kvm_regs *regs)
6aa8b732 2090{
bccf2150 2091 vcpu_load(vcpu);
6aa8b732
AK		 2092
2093 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2094 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2095 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2096 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2097 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2098 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2099 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2100 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 2101#ifdef CONFIG_X86_64
6aa8b732
AK		 2102 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2103 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2104 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2105 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2106 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2107 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2108 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2109 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2110#endif
2111
2112 vcpu->rip = regs->rip;
2113 kvm_arch_ops->set_rflags(vcpu, regs->rflags);
2114
2115 kvm_arch_ops->decache_regs(vcpu);
2116
2117 vcpu_put(vcpu);
2118
2119 return 0;
2120}
2121
2122static void get_segment(struct kvm_vcpu *vcpu,
2123 struct kvm_segment *var, int seg)
2124{
2125 return kvm_arch_ops->get_segment(vcpu, var, seg);
2126}
2127
bccf2150
AK		 2128static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2129 struct kvm_sregs *sregs)
6aa8b732 2130{
6aa8b732 2131 struct descriptor_table dt;
2a8067f1 2132 int pending_vec;
6aa8b732 2133
bccf2150 2134 vcpu_load(vcpu);
6aa8b732
AK		 2135
2136 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2137 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2138 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2139 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2140 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2141 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2142
2143 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2144 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2145
2146 kvm_arch_ops->get_idt(vcpu, &dt);
2147 sregs->idt.limit = dt.limit;
2148 sregs->idt.base = dt.base;
2149 kvm_arch_ops->get_gdt(vcpu, &dt);
2150 sregs->gdt.limit = dt.limit;
2151 sregs->gdt.base = dt.base;
2152
25c4c276 2153 kvm_arch_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 2154 sregs->cr0 = vcpu->cr0;
2155 sregs->cr2 = vcpu->cr2;
2156 sregs->cr3 = vcpu->cr3;
2157 sregs->cr4 = vcpu->cr4;
7017fc3d 2158 sregs->cr8 = get_cr8(vcpu);
6aa8b732 2159 sregs->efer = vcpu->shadow_efer;
7017fc3d 2160 sregs->apic_base = kvm_get_apic_base(vcpu);
6aa8b732 2161
2a8067f1 2162 if (irqchip_in_kernel(vcpu->kvm)) {
c52fb35a
HQ		 2163 memset(sregs->interrupt_bitmap, 0,
2164 sizeof sregs->interrupt_bitmap);
2a8067f1
ED		 2165 pending_vec = kvm_arch_ops->get_irq(vcpu);
2166 if (pending_vec >= 0)
2167 set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap);
2168 } else
c52fb35a
HQ		 2169 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2170 sizeof sregs->interrupt_bitmap);
6aa8b732
AK		 2171
2172 vcpu_put(vcpu);
2173
2174 return 0;
2175}
2176
2177static void set_segment(struct kvm_vcpu *vcpu,
2178 struct kvm_segment *var, int seg)
2179{
2180 return kvm_arch_ops->set_segment(vcpu, var, seg);
2181}
2182
bccf2150
AK		 2183static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2184 struct kvm_sregs *sregs)
6aa8b732 2185{
6aa8b732 2186 int mmu_reset_needed = 0;
2a8067f1 2187 int i, pending_vec, max_bits;
6aa8b732
AK		 2188 struct descriptor_table dt;
2189
bccf2150 2190 vcpu_load(vcpu);
6aa8b732 2191
6aa8b732
AK		 2192 dt.limit = sregs->idt.limit;
2193 dt.base = sregs->idt.base;
2194 kvm_arch_ops->set_idt(vcpu, &dt);
2195 dt.limit = sregs->gdt.limit;
2196 dt.base = sregs->gdt.base;
2197 kvm_arch_ops->set_gdt(vcpu, &dt);
2198
2199 vcpu->cr2 = sregs->cr2;
2200 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2201 vcpu->cr3 = sregs->cr3;
2202
7017fc3d 2203 set_cr8(vcpu, sregs->cr8);
6aa8b732
AK		 2204
2205 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 2206#ifdef CONFIG_X86_64
6aa8b732
AK		 2207 kvm_arch_ops->set_efer(vcpu, sregs->efer);
2208#endif
7017fc3d 2209 kvm_set_apic_base(vcpu, sregs->apic_base);
6aa8b732 2210
25c4c276 2211 kvm_arch_ops->decache_cr4_guest_bits(vcpu);
399badf3 2212
6aa8b732 2213 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
f6528b03 2214 kvm_arch_ops->set_cr0(vcpu, sregs->cr0);
6aa8b732
AK		 2215
2216 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
2217 kvm_arch_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 2218 if (!is_long_mode(vcpu) && is_pae(vcpu))
2219 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 2220
2221 if (mmu_reset_needed)
2222 kvm_mmu_reset_context(vcpu);
2223
c52fb35a
HQ		 2224 if (!irqchip_in_kernel(vcpu->kvm)) {
2225 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2226 sizeof vcpu->irq_pending);
2227 vcpu->irq_summary = 0;
2228 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2229 if (vcpu->irq_pending[i])
2230 __set_bit(i, &vcpu->irq_summary);
2a8067f1
ED		 2231 } else {
2232 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2233 pending_vec = find_first_bit(
2234 (const unsigned long *)sregs->interrupt_bitmap,
2235 max_bits);
2236 /* Only pending external irq is handled here */
2237 if (pending_vec < max_bits) {
2238 kvm_arch_ops->set_irq(vcpu, pending_vec);
2239 printk("Set back pending irq %d\n", pending_vec);
2240 }
c52fb35a 2241 }
6aa8b732 2242
024aa1c0
AK		 2243 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2244 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2245 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2246 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2247 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2248 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2249
2250 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2251 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2252
6aa8b732
AK		 2253 vcpu_put(vcpu);
2254
2255 return 0;
2256}
2257
2258/*
2259 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
2260 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
bf591b24
MR		 2261 *
2262 * This list is modified at module load time to reflect the
2263 * capabilities of the host cpu.
6aa8b732
AK		 2264 */
2265static u32 msrs_to_save[] = {
2266 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
2267 MSR_K6_STAR,
05b3e0c2 2268#ifdef CONFIG_X86_64
6aa8b732
AK		 2269 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
2270#endif
2271 MSR_IA32_TIME_STAMP_COUNTER,
2272};
2273
bf591b24
MR		 2274static unsigned num_msrs_to_save;
2275
6f00e68f
AK		 2276static u32 emulated_msrs[] = {
2277 MSR_IA32_MISC_ENABLE,
2278};
2279
bf591b24
MR		 2280static __init void kvm_init_msr_list(void)
2281{
2282 u32 dummy[2];
2283 unsigned i, j;
2284
2285 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
2286 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
2287 continue;
2288 if (j < i)
2289 msrs_to_save[j] = msrs_to_save[i];
2290 j++;
2291 }
2292 num_msrs_to_save = j;
2293}
6aa8b732
AK		 2294
2295/*
2296 * Adapt set_msr() to msr_io()'s calling convention
2297 */
2298static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
2299{
35f3f286 2300 return kvm_set_msr(vcpu, index, *data);
6aa8b732
AK		 2301}
2302
2303/*
2304 * Read or write a bunch of msrs. All parameters are kernel addresses.
2305 *
2306 * @return number of msrs set successfully.
2307 */
bccf2150 2308static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
6aa8b732
AK		 2309 struct kvm_msr_entry *entries,
2310 int (*do_msr)(struct kvm_vcpu *vcpu,
2311 unsigned index, u64 *data))
2312{
6aa8b732
AK		 2313 int i;
2314
bccf2150 2315 vcpu_load(vcpu);
6aa8b732
AK		 2316
2317 for (i = 0; i < msrs->nmsrs; ++i)
2318 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2319 break;
2320
2321 vcpu_put(vcpu);
2322
2323 return i;
2324}
2325
2326/*
2327 * Read or write a bunch of msrs. Parameters are user addresses.
2328 *
2329 * @return number of msrs set successfully.
2330 */
bccf2150 2331static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
6aa8b732
AK		 2332 int (*do_msr)(struct kvm_vcpu *vcpu,
2333 unsigned index, u64 *data),
2334 int writeback)
2335{
2336 struct kvm_msrs msrs;
2337 struct kvm_msr_entry *entries;
2338 int r, n;
2339 unsigned size;
2340
2341 r = -EFAULT;
2342 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2343 goto out;
2344
2345 r = -E2BIG;
2346 if (msrs.nmsrs >= MAX_IO_MSRS)
2347 goto out;
2348
2349 r = -ENOMEM;
2350 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
2351 entries = vmalloc(size);
2352 if (!entries)
2353 goto out;
2354
2355 r = -EFAULT;
2356 if (copy_from_user(entries, user_msrs->entries, size))
2357 goto out_free;
2358
bccf2150 2359 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
6aa8b732
AK		 2360 if (r < 0)
2361 goto out_free;
2362
2363 r = -EFAULT;
2364 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2365 goto out_free;
2366
2367 r = n;
2368
2369out_free:
2370 vfree(entries);
2371out:
2372 return r;
2373}
2374
2375/*
2376 * Translate a guest virtual address to a guest physical address.
2377 */
bccf2150
AK		 2378static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2379 struct kvm_translation *tr)
6aa8b732
AK		 2380{
2381 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 2382 gpa_t gpa;
2383
bccf2150 2384 vcpu_load(vcpu);
11ec2804 2385 mutex_lock(&vcpu->kvm->lock);
6aa8b732
AK		 2386 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2387 tr->physical_address = gpa;
2388 tr->valid = gpa != UNMAPPED_GVA;
2389 tr->writeable = 1;
2390 tr->usermode = 0;
11ec2804 2391 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 2392 vcpu_put(vcpu);
2393
2394 return 0;
2395}
2396
bccf2150
AK		 2397static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2398 struct kvm_interrupt *irq)
6aa8b732 2399{
6aa8b732
AK		 2400 if (irq->irq < 0 || irq->irq >= 256)
2401 return -EINVAL;
97222cc8
ED		 2402 if (irqchip_in_kernel(vcpu->kvm))
2403 return -ENXIO;
bccf2150 2404 vcpu_load(vcpu);
6aa8b732
AK		 2405
2406 set_bit(irq->irq, vcpu->irq_pending);
2407 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2408
2409 vcpu_put(vcpu);
2410
2411 return 0;
2412}
2413
bccf2150
AK		 2414static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2415 struct kvm_debug_guest *dbg)
6aa8b732 2416{
6aa8b732
AK		 2417 int r;
2418
bccf2150 2419 vcpu_load(vcpu);
6aa8b732
AK		 2420
2421 r = kvm_arch_ops->set_guest_debug(vcpu, dbg);
2422
2423 vcpu_put(vcpu);
2424
2425 return r;
2426}
2427
9a2bb7f4
AK		 2428static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2429 unsigned long address,
2430 int *type)
2431{
2432 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2433 unsigned long pgoff;
2434 struct page *page;
2435
9a2bb7f4 2436 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
039576c0
AK		 2437 if (pgoff == 0)
2438 page = virt_to_page(vcpu->run);
2439 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2440 page = virt_to_page(vcpu->pio_data);
2441 else
9a2bb7f4 2442 return NOPAGE_SIGBUS;
9a2bb7f4 2443 get_page(page);
cd0d9137
NAQ		 2444 if (type != NULL)
2445 *type = VM_FAULT_MINOR;
2446
9a2bb7f4
AK		 2447 return page;
2448}
2449
2450static struct vm_operations_struct kvm_vcpu_vm_ops = {
2451 .nopage = kvm_vcpu_nopage,
2452};
2453
2454static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2455{
2456 vma->vm_ops = &kvm_vcpu_vm_ops;
2457 return 0;
2458}
2459
bccf2150
AK		 2460static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2461{
2462 struct kvm_vcpu *vcpu = filp->private_data;
2463
2464 fput(vcpu->kvm->filp);
2465 return 0;
2466}
2467
2468static struct file_operations kvm_vcpu_fops = {
2469 .release = kvm_vcpu_release,
2470 .unlocked_ioctl = kvm_vcpu_ioctl,
2471 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 2472 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 2473};
2474
2475/*
2476 * Allocates an inode for the vcpu.
2477 */
2478static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2479{
2480 int fd, r;
2481 struct inode *inode;
2482 struct file *file;
2483
d6d28168
AK		 2484 r = anon_inode_getfd(&fd, &inode, &file,
2485 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2486 if (r)
2487 return r;
bccf2150 2488 atomic_inc(&vcpu->kvm->filp->f_count);
bccf2150 2489 return fd;
bccf2150
AK		 2490}
2491
c5ea7660
AK		 2492/*
2493 * Creates some virtual cpus. Good luck creating more than one.
2494 */
2495static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2496{
2497 int r;
2498 struct kvm_vcpu *vcpu;
2499
c5ea7660 2500 if (!valid_vcpu(n))
fb3f0f51 2501 return -EINVAL;
c5ea7660 2502
fb3f0f51
RR		 2503 vcpu = kvm_arch_ops->vcpu_create(kvm, n);
2504 if (IS_ERR(vcpu))
2505 return PTR_ERR(vcpu);
c5ea7660 2506
15ad7146
AK		 2507 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2508
b114b080
RR		 2509 /* We do fxsave: this must be aligned. */
2510 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2511
fb3f0f51 2512 vcpu_load(vcpu);
c5ea7660 2513 r = kvm_mmu_setup(vcpu);
c5ea7660 2514 vcpu_put(vcpu);
c5ea7660 2515 if (r < 0)
fb3f0f51
RR		 2516 goto free_vcpu;
2517
11ec2804 2518 mutex_lock(&kvm->lock);
fb3f0f51
RR		 2519 if (kvm->vcpus[n]) {
2520 r = -EEXIST;
11ec2804 2521 mutex_unlock(&kvm->lock);
fb3f0f51
RR		 2522 goto mmu_unload;
2523 }
2524 kvm->vcpus[n] = vcpu;
11ec2804 2525 mutex_unlock(&kvm->lock);
c5ea7660 2526
fb3f0f51 2527 /* Now it's all set up, let userspace reach it */
bccf2150
AK		 2528 r = create_vcpu_fd(vcpu);
2529 if (r < 0)
fb3f0f51
RR		 2530 goto unlink;
2531 return r;
39c3b86e 2532
fb3f0f51 2533unlink:
11ec2804 2534 mutex_lock(&kvm->lock);
fb3f0f51 2535 kvm->vcpus[n] = NULL;
11ec2804 2536 mutex_unlock(&kvm->lock);
a2fa3e9f 2537
fb3f0f51
RR		 2538mmu_unload:
2539 vcpu_load(vcpu);
2540 kvm_mmu_unload(vcpu);
2541 vcpu_put(vcpu);
c5ea7660 2542
fb3f0f51
RR		 2543free_vcpu:
2544 kvm_arch_ops->vcpu_free(vcpu);
c5ea7660
AK		 2545 return r;
2546}
2547
2cc51560
ED		 2548static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
2549{
2550 u64 efer;
2551 int i;
2552 struct kvm_cpuid_entry *e, *entry;
2553
2554 rdmsrl(MSR_EFER, efer);
2555 entry = NULL;
2556 for (i = 0; i < vcpu->cpuid_nent; ++i) {
2557 e = &vcpu->cpuid_entries[i];
2558 if (e->function == 0x80000001) {
2559 entry = e;
2560 break;
2561 }
2562 }
4c981b43 2563 if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
2cc51560 2564 entry->edx &= ~(1 << 20);
4c981b43 2565 printk(KERN_INFO "kvm: guest NX capability removed\n");
2cc51560
ED		 2566 }
2567}
2568
06465c5a
AK		 2569static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
2570 struct kvm_cpuid *cpuid,
2571 struct kvm_cpuid_entry __user *entries)
2572{
2573 int r;
2574
2575 r = -E2BIG;
2576 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2577 goto out;
2578 r = -EFAULT;
2579 if (copy_from_user(&vcpu->cpuid_entries, entries,
2580 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
2581 goto out;
2582 vcpu->cpuid_nent = cpuid->nent;
2cc51560 2583 cpuid_fix_nx_cap(vcpu);
06465c5a
AK		 2584 return 0;
2585
2586out:
2587 return r;
2588}
2589
1961d276
AK		 2590static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2591{
2592 if (sigset) {
2593 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2594 vcpu->sigset_active = 1;
2595 vcpu->sigset = *sigset;
2596 } else
2597 vcpu->sigset_active = 0;
2598 return 0;
2599}
2600
b8836737
AK		 2601/*
2602 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2603 * we have asm/x86/processor.h
2604 */
2605struct fxsave {
2606 u16 cwd;
2607 u16 swd;
2608 u16 twd;
2609 u16 fop;
2610 u64 rip;
2611 u64 rdp;
2612 u32 mxcsr;
2613 u32 mxcsr_mask;
2614 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2615#ifdef CONFIG_X86_64
2616 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2617#else
2618 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2619#endif
2620};
2621
2622static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2623{
b114b080 2624 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2625
2626 vcpu_load(vcpu);
2627
2628 memcpy(fpu->fpr, fxsave->st_space, 128);
2629 fpu->fcw = fxsave->cwd;
2630 fpu->fsw = fxsave->swd;
2631 fpu->ftwx = fxsave->twd;
2632 fpu->last_opcode = fxsave->fop;
2633 fpu->last_ip = fxsave->rip;
2634 fpu->last_dp = fxsave->rdp;
2635 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2636
2637 vcpu_put(vcpu);
2638
2639 return 0;
2640}
2641
2642static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2643{
b114b080 2644 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2645
2646 vcpu_load(vcpu);
2647
2648 memcpy(fxsave->st_space, fpu->fpr, 128);
2649 fxsave->cwd = fpu->fcw;
2650 fxsave->swd = fpu->fsw;
2651 fxsave->twd = fpu->ftwx;
2652 fxsave->fop = fpu->last_opcode;
2653 fxsave->rip = fpu->last_ip;
2654 fxsave->rdp = fpu->last_dp;
2655 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2656
2657 vcpu_put(vcpu);
2658
2659 return 0;
2660}
2661
96ad2cc6
ED		 2662static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2663 struct kvm_lapic_state *s)
2664{
2665 vcpu_load(vcpu);
2666 memcpy(s->regs, vcpu->apic->regs, sizeof *s);
2667 vcpu_put(vcpu);
2668
2669 return 0;
2670}
2671
2672static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2673 struct kvm_lapic_state *s)
2674{
2675 vcpu_load(vcpu);
2676 memcpy(vcpu->apic->regs, s->regs, sizeof *s);
2677 kvm_apic_post_state_restore(vcpu);
2678 vcpu_put(vcpu);
2679
2680 return 0;
2681}
2682
bccf2150
AK		 2683static long kvm_vcpu_ioctl(struct file *filp,
2684 unsigned int ioctl, unsigned long arg)
6aa8b732 2685{
bccf2150 2686 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 2687 void __user *argp = (void __user *)arg;
6aa8b732
AK		 2688 int r = -EINVAL;
2689
2690 switch (ioctl) {
9a2bb7f4 2691 case KVM_RUN:
f0fe5108
AK		 2692 r = -EINVAL;
2693 if (arg)
2694 goto out;
9a2bb7f4 2695 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 2696 break;
6aa8b732
AK		 2697 case KVM_GET_REGS: {
2698 struct kvm_regs kvm_regs;
2699
bccf2150
AK		 2700 memset(&kvm_regs, 0, sizeof kvm_regs);
2701 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2702 if (r)
2703 goto out;
2704 r = -EFAULT;
2f366987 2705 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2706 goto out;
2707 r = 0;
2708 break;
2709 }
2710 case KVM_SET_REGS: {
2711 struct kvm_regs kvm_regs;
2712
2713 r = -EFAULT;
2f366987 2714 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2715 goto out;
bccf2150 2716 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2717 if (r)
2718 goto out;
2719 r = 0;
2720 break;
2721 }
2722 case KVM_GET_SREGS: {
2723 struct kvm_sregs kvm_sregs;
2724
bccf2150
AK		 2725 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2726 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2727 if (r)
2728 goto out;
2729 r = -EFAULT;
2f366987 2730 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2731 goto out;
2732 r = 0;
2733 break;
2734 }
2735 case KVM_SET_SREGS: {
2736 struct kvm_sregs kvm_sregs;
2737
2738 r = -EFAULT;
2f366987 2739 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2740 goto out;
bccf2150 2741 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2742 if (r)
2743 goto out;
2744 r = 0;
2745 break;
2746 }
2747 case KVM_TRANSLATE: {
2748 struct kvm_translation tr;
2749
2750 r = -EFAULT;
2f366987 2751 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2752 goto out;
bccf2150 2753 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2754 if (r)
2755 goto out;
2756 r = -EFAULT;
2f366987 2757 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2758 goto out;
2759 r = 0;
2760 break;
2761 }
2762 case KVM_INTERRUPT: {
2763 struct kvm_interrupt irq;
2764
2765 r = -EFAULT;
2f366987 2766 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2767 goto out;
bccf2150 2768 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2769 if (r)
2770 goto out;
2771 r = 0;
2772 break;
2773 }
2774 case KVM_DEBUG_GUEST: {
2775 struct kvm_debug_guest dbg;
2776
2777 r = -EFAULT;
2f366987 2778 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2779 goto out;
bccf2150 2780 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2781 if (r)
2782 goto out;
2783 r = 0;
2784 break;
2785 }
bccf2150 2786 case KVM_GET_MSRS:
35f3f286 2787 r = msr_io(vcpu, argp, kvm_get_msr, 1);
bccf2150
AK		 2788 break;
2789 case KVM_SET_MSRS:
2790 r = msr_io(vcpu, argp, do_set_msr, 0);
2791 break;
06465c5a
AK		 2792 case KVM_SET_CPUID: {
2793 struct kvm_cpuid __user *cpuid_arg = argp;
2794 struct kvm_cpuid cpuid;
2795
2796 r = -EFAULT;
2797 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2798 goto out;
2799 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2800 if (r)
2801 goto out;
2802 break;
2803 }
1961d276
AK		 2804 case KVM_SET_SIGNAL_MASK: {
2805 struct kvm_signal_mask __user *sigmask_arg = argp;
2806 struct kvm_signal_mask kvm_sigmask;
2807 sigset_t sigset, *p;
2808
2809 p = NULL;
2810 if (argp) {
2811 r = -EFAULT;
2812 if (copy_from_user(&kvm_sigmask, argp,
2813 sizeof kvm_sigmask))
2814 goto out;
2815 r = -EINVAL;
2816 if (kvm_sigmask.len != sizeof sigset)
2817 goto out;
2818 r = -EFAULT;
2819 if (copy_from_user(&sigset, sigmask_arg->sigset,
2820 sizeof sigset))
2821 goto out;
2822 p = &sigset;
2823 }
2824 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2825 break;
2826 }
b8836737
AK		 2827 case KVM_GET_FPU: {
2828 struct kvm_fpu fpu;
2829
2830 memset(&fpu, 0, sizeof fpu);
2831 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2832 if (r)
2833 goto out;
2834 r = -EFAULT;
2835 if (copy_to_user(argp, &fpu, sizeof fpu))
2836 goto out;
2837 r = 0;
2838 break;
2839 }
2840 case KVM_SET_FPU: {
2841 struct kvm_fpu fpu;
2842
2843 r = -EFAULT;
2844 if (copy_from_user(&fpu, argp, sizeof fpu))
2845 goto out;
2846 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2847 if (r)
2848 goto out;
2849 r = 0;
2850 break;
2851 }
96ad2cc6
ED		 2852 case KVM_GET_LAPIC: {
2853 struct kvm_lapic_state lapic;
2854
2855 memset(&lapic, 0, sizeof lapic);
2856 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
2857 if (r)
2858 goto out;
2859 r = -EFAULT;
2860 if (copy_to_user(argp, &lapic, sizeof lapic))
2861 goto out;
2862 r = 0;
2863 break;
2864 }
2865 case KVM_SET_LAPIC: {
2866 struct kvm_lapic_state lapic;
2867
2868 r = -EFAULT;
2869 if (copy_from_user(&lapic, argp, sizeof lapic))
2870 goto out;
2871 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
2872 if (r)
2873 goto out;
2874 r = 0;
2875 break;
2876 }
bccf2150
AK		 2877 default:
2878 ;
2879 }
2880out:
2881 return r;
2882}
2883
2884static long kvm_vm_ioctl(struct file *filp,
2885 unsigned int ioctl, unsigned long arg)
2886{
2887 struct kvm *kvm = filp->private_data;
2888 void __user *argp = (void __user *)arg;
2889 int r = -EINVAL;
2890
2891 switch (ioctl) {
2892 case KVM_CREATE_VCPU:
2893 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2894 if (r < 0)
2895 goto out;
2896 break;
6aa8b732
AK		 2897 case KVM_SET_MEMORY_REGION: {
2898 struct kvm_memory_region kvm_mem;
2899
2900 r = -EFAULT;
2f366987 2901 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 2902 goto out;
2c6f5df9 2903 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
6aa8b732
AK		 2904 if (r)
2905 goto out;
2906 break;
2907 }
2908 case KVM_GET_DIRTY_LOG: {
2909 struct kvm_dirty_log log;
2910
2911 r = -EFAULT;
2f366987 2912 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 2913 goto out;
2c6f5df9 2914 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 2915 if (r)
2916 goto out;
2917 break;
2918 }
e8207547
AK		 2919 case KVM_SET_MEMORY_ALIAS: {
2920 struct kvm_memory_alias alias;
2921
2922 r = -EFAULT;
2923 if (copy_from_user(&alias, argp, sizeof alias))
2924 goto out;
2925 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
2926 if (r)
2927 goto out;
2928 break;
2929 }
85f455f7
ED		 2930 case KVM_CREATE_IRQCHIP:
2931 r = -ENOMEM;
2932 kvm->vpic = kvm_create_pic(kvm);
1fd4f2a5
ED		 2933 if (kvm->vpic) {
2934 r = kvm_ioapic_init(kvm);
2935 if (r) {
2936 kfree(kvm->vpic);
2937 kvm->vpic = NULL;
2938 goto out;
2939 }
2940 }
85f455f7
ED		 2941 else
2942 goto out;
2943 break;
2944 case KVM_IRQ_LINE: {
2945 struct kvm_irq_level irq_event;
2946
2947 r = -EFAULT;
2948 if (copy_from_user(&irq_event, argp, sizeof irq_event))
2949 goto out;
2950 if (irqchip_in_kernel(kvm)) {
9cf98828 2951 mutex_lock(&kvm->lock);
85f455f7
ED		 2952 if (irq_event.irq < 16)
2953 kvm_pic_set_irq(pic_irqchip(kvm),
2954 irq_event.irq,
2955 irq_event.level);
1fd4f2a5
ED		 2956 kvm_ioapic_set_irq(kvm->vioapic,
2957 irq_event.irq,
2958 irq_event.level);
9cf98828 2959 mutex_unlock(&kvm->lock);
85f455f7
ED		 2960 r = 0;
2961 }
2962 break;
2963 }
6ceb9d79
HQ		 2964 case KVM_GET_IRQCHIP: {
2965 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2966 struct kvm_irqchip chip;
2967
2968 r = -EFAULT;
2969 if (copy_from_user(&chip, argp, sizeof chip))
2970 goto out;
2971 r = -ENXIO;
2972 if (!irqchip_in_kernel(kvm))
2973 goto out;
2974 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
2975 if (r)
2976 goto out;
2977 r = -EFAULT;
2978 if (copy_to_user(argp, &chip, sizeof chip))
2979 goto out;
2980 r = 0;
2981 break;
2982 }
2983 case KVM_SET_IRQCHIP: {
2984 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
2985 struct kvm_irqchip chip;
2986
2987 r = -EFAULT;
2988 if (copy_from_user(&chip, argp, sizeof chip))
2989 goto out;
2990 r = -ENXIO;
2991 if (!irqchip_in_kernel(kvm))
2992 goto out;
2993 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
2994 if (r)
2995 goto out;
2996 r = 0;
2997 break;
2998 }
f17abe9a
AK		 2999 default:
3000 ;
3001 }
3002out:
3003 return r;
3004}
3005
3006static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3007 unsigned long address,
3008 int *type)
3009{
3010 struct kvm *kvm = vma->vm_file->private_data;
3011 unsigned long pgoff;
f17abe9a
AK		 3012 struct page *page;
3013
f17abe9a 3014 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
954bbbc2 3015 page = gfn_to_page(kvm, pgoff);
f17abe9a
AK		 3016 if (!page)
3017 return NOPAGE_SIGBUS;
3018 get_page(page);
cd0d9137
NAQ		 3019 if (type != NULL)
3020 *type = VM_FAULT_MINOR;
3021
f17abe9a
AK		 3022 return page;
3023}
3024
3025static struct vm_operations_struct kvm_vm_vm_ops = {
3026 .nopage = kvm_vm_nopage,
3027};
3028
3029static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3030{
3031 vma->vm_ops = &kvm_vm_vm_ops;
3032 return 0;
3033}
3034
3035static struct file_operations kvm_vm_fops = {
3036 .release = kvm_vm_release,
3037 .unlocked_ioctl = kvm_vm_ioctl,
3038 .compat_ioctl = kvm_vm_ioctl,
3039 .mmap = kvm_vm_mmap,
3040};
3041
3042static int kvm_dev_ioctl_create_vm(void)
3043{
3044 int fd, r;
3045 struct inode *inode;
3046 struct file *file;
3047 struct kvm *kvm;
3048
f17abe9a 3049 kvm = kvm_create_vm();
d6d28168
AK		 3050 if (IS_ERR(kvm))
3051 return PTR_ERR(kvm);
3052 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3053 if (r) {
3054 kvm_destroy_vm(kvm);
3055 return r;
f17abe9a
AK		 3056 }
3057
bccf2150 3058 kvm->filp = file;
f17abe9a 3059
f17abe9a 3060 return fd;
f17abe9a
AK		 3061}
3062
3063static long kvm_dev_ioctl(struct file *filp,
3064 unsigned int ioctl, unsigned long arg)
3065{
3066 void __user *argp = (void __user *)arg;
07c45a36 3067 long r = -EINVAL;
f17abe9a
AK		 3068
3069 switch (ioctl) {
3070 case KVM_GET_API_VERSION:
f0fe5108
AK		 3071 r = -EINVAL;
3072 if (arg)
3073 goto out;
f17abe9a
AK		 3074 r = KVM_API_VERSION;
3075 break;
3076 case KVM_CREATE_VM:
f0fe5108
AK		 3077 r = -EINVAL;
3078 if (arg)
3079 goto out;
f17abe9a
AK		 3080 r = kvm_dev_ioctl_create_vm();
3081 break;
6aa8b732 3082 case KVM_GET_MSR_INDEX_LIST: {
2f366987 3083 struct kvm_msr_list __user *user_msr_list = argp;
6aa8b732
AK		 3084 struct kvm_msr_list msr_list;
3085 unsigned n;
3086
3087 r = -EFAULT;
3088 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
3089 goto out;
3090 n = msr_list.nmsrs;
6f00e68f 3091 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
6aa8b732
AK		 3092 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
3093 goto out;
3094 r = -E2BIG;
bf591b24 3095 if (n < num_msrs_to_save)
6aa8b732
AK		 3096 goto out;
3097 r = -EFAULT;
3098 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
bf591b24 3099 num_msrs_to_save * sizeof(u32)))
6aa8b732 3100 goto out;
6f00e68f
AK		 3101 if (copy_to_user(user_msr_list->indices
3102 + num_msrs_to_save * sizeof(u32),
3103 &emulated_msrs,
3104 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
3105 goto out;
6aa8b732 3106 r = 0;
cc1d8955 3107 break;
6aa8b732 3108 }
85f455f7
ED		 3109 case KVM_CHECK_EXTENSION: {
3110 int ext = (long)argp;
3111
3112 switch (ext) {
3113 case KVM_CAP_IRQCHIP:
b6958ce4 3114 case KVM_CAP_HLT:
85f455f7
ED		 3115 r = 1;
3116 break;
3117 default:
3118 r = 0;
3119 break;
3120 }
5d308f45 3121 break;
85f455f7 3122 }
07c45a36
AK		 3123 case KVM_GET_VCPU_MMAP_SIZE:
3124 r = -EINVAL;
3125 if (arg)
3126 goto out;
039576c0 3127 r = 2 * PAGE_SIZE;
07c45a36 3128 break;
6aa8b732
AK		 3129 default:
3130 ;
3131 }
3132out:
3133 return r;
3134}
3135
6aa8b732 3136static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 3137 .unlocked_ioctl = kvm_dev_ioctl,
3138 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 3139};
3140
3141static struct miscdevice kvm_dev = {
bbe4432e 3142 KVM_MINOR,
6aa8b732
AK		 3143 "kvm",
3144 &kvm_chardev_ops,
3145};
3146
774c47f1
AK		 3147/*
3148 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3149 * cached on it.
3150 */
3151static void decache_vcpus_on_cpu(int cpu)
3152{
3153 struct kvm *vm;
3154 struct kvm_vcpu *vcpu;
3155 int i;
3156
3157 spin_lock(&kvm_lock);
11ec2804 3158 list_for_each_entry(vm, &vm_list, vm_list)
774c47f1 3159 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3160 vcpu = vm->vcpus[i];
3161 if (!vcpu)
3162 continue;
774c47f1
AK		 3163 /*
3164 * If the vcpu is locked, then it is running on some
3165 * other cpu and therefore it is not cached on the
3166 * cpu in question.
3167 *
3168 * If it's not locked, check the last cpu it executed
3169 * on.
3170 */
3171 if (mutex_trylock(&vcpu->mutex)) {
3172 if (vcpu->cpu == cpu) {
3173 kvm_arch_ops->vcpu_decache(vcpu);
3174 vcpu->cpu = -1;
3175 }
3176 mutex_unlock(&vcpu->mutex);
3177 }
3178 }
3179 spin_unlock(&kvm_lock);
3180}
3181
1b6c0168
AK		 3182static void hardware_enable(void *junk)
3183{
3184 int cpu = raw_smp_processor_id();
3185
3186 if (cpu_isset(cpu, cpus_hardware_enabled))
3187 return;
3188 cpu_set(cpu, cpus_hardware_enabled);
3189 kvm_arch_ops->hardware_enable(NULL);
3190}
3191
3192static void hardware_disable(void *junk)
3193{
3194 int cpu = raw_smp_processor_id();
3195
3196 if (!cpu_isset(cpu, cpus_hardware_enabled))
3197 return;
3198 cpu_clear(cpu, cpus_hardware_enabled);
3199 decache_vcpus_on_cpu(cpu);
3200 kvm_arch_ops->hardware_disable(NULL);
3201}
3202
774c47f1
AK		 3203static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3204 void *v)
3205{
3206 int cpu = (long)v;
3207
3208 switch (val) {
cec9ad27
AK		 3209 case CPU_DYING:
3210 case CPU_DYING_FROZEN:
6ec8a856
AK		 3211 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3212 cpu);
3213 hardware_disable(NULL);
3214 break;
774c47f1 3215 case CPU_UP_CANCELED:
8bb78442 3216 case CPU_UP_CANCELED_FROZEN:
43934a38
JK		 3217 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3218 cpu);
1b6c0168 3219 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
774c47f1 3220 break;
43934a38 3221 case CPU_ONLINE:
8bb78442 3222 case CPU_ONLINE_FROZEN:
43934a38
JK		 3223 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3224 cpu);
1b6c0168 3225 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
774c47f1
AK		 3226 break;
3227 }
3228 return NOTIFY_OK;
3229}
3230
9a2b85c6
RR		 3231static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
3232 void *v)
3233{
3234 if (val == SYS_RESTART) {
3235 /*
3236 * Some (well, at least mine) BIOSes hang on reboot if
3237 * in vmx root mode.
3238 */
3239 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3240 on_each_cpu(hardware_disable, NULL, 0, 1);
3241 }
3242 return NOTIFY_OK;
3243}
3244
3245static struct notifier_block kvm_reboot_notifier = {
3246 .notifier_call = kvm_reboot,
3247 .priority = 0,
3248};
3249
2eeb2e94
GH		 3250void kvm_io_bus_init(struct kvm_io_bus *bus)
3251{
3252 memset(bus, 0, sizeof(*bus));
3253}
3254
3255void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3256{
3257 int i;
3258
3259 for (i = 0; i < bus->dev_count; i++) {
3260 struct kvm_io_device *pos = bus->devs[i];
3261
3262 kvm_iodevice_destructor(pos);
3263 }
3264}
3265
3266struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3267{
3268 int i;
3269
3270 for (i = 0; i < bus->dev_count; i++) {
3271 struct kvm_io_device *pos = bus->devs[i];
3272
3273 if (pos->in_range(pos, addr))
3274 return pos;
3275 }
3276
3277 return NULL;
3278}
3279
3280void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3281{
3282 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3283
3284 bus->devs[bus->dev_count++] = dev;
3285}
3286
774c47f1
AK		 3287static struct notifier_block kvm_cpu_notifier = {
3288 .notifier_call = kvm_cpu_hotplug,
3289 .priority = 20, /* must be > scheduler priority */
3290};
3291
1165f5fe
AK		 3292static u64 stat_get(void *_offset)
3293{
3294 unsigned offset = (long)_offset;
3295 u64 total = 0;
3296 struct kvm *kvm;
3297 struct kvm_vcpu *vcpu;
3298 int i;
3299
3300 spin_lock(&kvm_lock);
3301 list_for_each_entry(kvm, &vm_list, vm_list)
3302 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3303 vcpu = kvm->vcpus[i];
3304 if (vcpu)
3305 total += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 3306 }
3307 spin_unlock(&kvm_lock);
3308 return total;
3309}
3310
3dea7ca7 3311DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
1165f5fe 3312
6aa8b732
AK		 3313static __init void kvm_init_debug(void)
3314{
3315 struct kvm_stats_debugfs_item *p;
3316
8b6d44c7 3317 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 3318 for (p = debugfs_entries; p->name; ++p)
1165f5fe
AK		 3319 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3320 (void *)(long)p->offset,
3321 &stat_fops);
6aa8b732
AK		 3322}
3323
3324static void kvm_exit_debug(void)
3325{
3326 struct kvm_stats_debugfs_item *p;
3327
3328 for (p = debugfs_entries; p->name; ++p)
3329 debugfs_remove(p->dentry);
3330 debugfs_remove(debugfs_dir);
3331}
3332
59ae6c6b
AK		 3333static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3334{
4267c41a 3335 hardware_disable(NULL);
59ae6c6b
AK		 3336 return 0;
3337}
3338
3339static int kvm_resume(struct sys_device *dev)
3340{
4267c41a 3341 hardware_enable(NULL);
59ae6c6b
AK		 3342 return 0;
3343}
3344
3345static struct sysdev_class kvm_sysdev_class = {
3346 set_kset_name("kvm"),
3347 .suspend = kvm_suspend,
3348 .resume = kvm_resume,
3349};
3350
3351static struct sys_device kvm_sysdev = {
3352 .id = 0,
3353 .cls = &kvm_sysdev_class,
3354};
3355
6aa8b732
AK		 3356hpa_t bad_page_address;
3357
15ad7146
AK		 3358static inline
3359struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3360{
3361 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3362}
3363
3364static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3365{
3366 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3367
3368 kvm_arch_ops->vcpu_load(vcpu, cpu);
3369}
3370
3371static void kvm_sched_out(struct preempt_notifier *pn,
3372 struct task_struct *next)
3373{
3374 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3375
3376 kvm_arch_ops->vcpu_put(vcpu);
3377}
3378
c16f862d
RR		 3379int kvm_init_arch(struct kvm_arch_ops *ops, unsigned int vcpu_size,
3380 struct module *module)
6aa8b732
AK		 3381{
3382 int r;
002c7f7c 3383 int cpu;
6aa8b732 3384
09db28b8
YI		 3385 if (kvm_arch_ops) {
3386 printk(KERN_ERR "kvm: already loaded the other module\n");
3387 return -EEXIST;
3388 }
3389
e097f35c 3390 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 3391 printk(KERN_ERR "kvm: no hardware support\n");
3392 return -EOPNOTSUPP;
3393 }
e097f35c 3394 if (ops->disabled_by_bios()) {
6aa8b732
AK		 3395 printk(KERN_ERR "kvm: disabled by bios\n");
3396 return -EOPNOTSUPP;
3397 }
3398
e097f35c
YI		 3399 kvm_arch_ops = ops;
3400
6aa8b732
AK		 3401 r = kvm_arch_ops->hardware_setup();
3402 if (r < 0)
ca45aaae 3403 goto out;
6aa8b732 3404
002c7f7c
YS		 3405 for_each_online_cpu(cpu) {
3406 smp_call_function_single(cpu,
3407 kvm_arch_ops->check_processor_compatibility,
3408 &r, 0, 1);
3409 if (r < 0)
3410 goto out_free_0;
3411 }
3412
1b6c0168 3413 on_each_cpu(hardware_enable, NULL, 0, 1);
774c47f1
AK		 3414 r = register_cpu_notifier(&kvm_cpu_notifier);
3415 if (r)
3416 goto out_free_1;
6aa8b732
AK		 3417 register_reboot_notifier(&kvm_reboot_notifier);
3418
59ae6c6b
AK		 3419 r = sysdev_class_register(&kvm_sysdev_class);
3420 if (r)
3421 goto out_free_2;
3422
3423 r = sysdev_register(&kvm_sysdev);
3424 if (r)
3425 goto out_free_3;
3426
c16f862d
RR		 3427 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3428 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3429 __alignof__(struct kvm_vcpu), 0, 0);
3430 if (!kvm_vcpu_cache) {
3431 r = -ENOMEM;
3432 goto out_free_4;
3433 }
3434
6aa8b732
AK		 3435 kvm_chardev_ops.owner = module;
3436
3437 r = misc_register(&kvm_dev);
3438 if (r) {
3439 printk (KERN_ERR "kvm: misc device register failed\n");
3440 goto out_free;
3441 }
3442
15ad7146
AK		 3443 kvm_preempt_ops.sched_in = kvm_sched_in;
3444 kvm_preempt_ops.sched_out = kvm_sched_out;
3445
6aa8b732
AK		 3446 return r;
3447
3448out_free:
c16f862d
RR		 3449 kmem_cache_destroy(kvm_vcpu_cache);
3450out_free_4:
59ae6c6b
AK		 3451 sysdev_unregister(&kvm_sysdev);
3452out_free_3:
3453 sysdev_class_unregister(&kvm_sysdev_class);
3454out_free_2:
6aa8b732 3455 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 3456 unregister_cpu_notifier(&kvm_cpu_notifier);
3457out_free_1:
1b6c0168 3458 on_each_cpu(hardware_disable, NULL, 0, 1);
002c7f7c 3459out_free_0:
6aa8b732 3460 kvm_arch_ops->hardware_unsetup();
ca45aaae
AK		 3461out:
3462 kvm_arch_ops = NULL;
6aa8b732
AK		 3463 return r;
3464}
3465
3466void kvm_exit_arch(void)
3467{
3468 misc_deregister(&kvm_dev);
c16f862d 3469 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 3470 sysdev_unregister(&kvm_sysdev);
3471 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 3472 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 3473 unregister_cpu_notifier(&kvm_cpu_notifier);
1b6c0168 3474 on_each_cpu(hardware_disable, NULL, 0, 1);
6aa8b732 3475 kvm_arch_ops->hardware_unsetup();
09db28b8 3476 kvm_arch_ops = NULL;
6aa8b732
AK		 3477}
3478
3479static __init int kvm_init(void)
3480{
3481 static struct page *bad_page;
37e29d90
AK		 3482 int r;
3483
b5a33a75
AK		 3484 r = kvm_mmu_module_init();
3485 if (r)
3486 goto out4;
3487
6aa8b732
AK		 3488 kvm_init_debug();
3489
bf591b24
MR		 3490 kvm_init_msr_list();
3491
6aa8b732
AK		 3492 if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
3493 r = -ENOMEM;
3494 goto out;
3495 }
3496
3497 bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
3498 memset(__va(bad_page_address), 0, PAGE_SIZE);
3499
58e690e6 3500 return 0;
6aa8b732
AK		 3501
3502out:
3503 kvm_exit_debug();
b5a33a75
AK		 3504 kvm_mmu_module_exit();
3505out4:
6aa8b732
AK		 3506 return r;
3507}
3508
3509static __exit void kvm_exit(void)
3510{
3511 kvm_exit_debug();
3512 __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
b5a33a75 3513 kvm_mmu_module_exit();
6aa8b732
AK		 3514}
3515
3516module_init(kvm_init)
3517module_exit(kvm_exit)
3518
3519EXPORT_SYMBOL_GPL(kvm_init_arch);
3520EXPORT_SYMBOL_GPL(kvm_exit_arch);
Linux kernel - Deliverables
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