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KVM: MMU: Make gfn_to_page() always safe
[net-next-2.6.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"
043405e1 19#include "x86.h"
e495606d
AK		 20#include "x86_emulate.h"
21#include "segment_descriptor.h"
85f455f7 22#include "irq.h"
6aa8b732
AK		 23
24#include <linux/kvm.h>
25#include <linux/module.h>
26#include <linux/errno.h>
6aa8b732
AK		 27#include <linux/percpu.h>
28#include <linux/gfp.h>
6aa8b732
AK		 29#include <linux/mm.h>
30#include <linux/miscdevice.h>
31#include <linux/vmalloc.h>
6aa8b732 32#include <linux/reboot.h>
6aa8b732
AK		 33#include <linux/debugfs.h>
34#include <linux/highmem.h>
35#include <linux/file.h>
59ae6c6b 36#include <linux/sysdev.h>
774c47f1 37#include <linux/cpu.h>
e8edc6e0 38#include <linux/sched.h>
d9e368d6
AK		 39#include <linux/cpumask.h>
40#include <linux/smp.h>
d6d28168 41#include <linux/anon_inodes.h>
04d2cc77 42#include <linux/profile.h>
7aa81cc0 43#include <linux/kvm_para.h>
6fc138d2 44#include <linux/pagemap.h>
6aa8b732 45
e495606d
AK		 46#include <asm/processor.h>
47#include <asm/msr.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50#include <asm/desc.h>
6aa8b732
AK		 51
52MODULE_AUTHOR("Qumranet");
53MODULE_LICENSE("GPL");
54
133de902
AK		 55static DEFINE_SPINLOCK(kvm_lock);
56static LIST_HEAD(vm_list);
57
1b6c0168
AK		 58static cpumask_t cpus_hardware_enabled;
59
cbdd1bea 60struct kvm_x86_ops *kvm_x86_ops;
c16f862d
RR		 61struct kmem_cache *kvm_vcpu_cache;
62EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 63
15ad7146
AK		 64static __read_mostly struct preempt_ops kvm_preempt_ops;
65
1165f5fe 66#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
6aa8b732
AK		 67
68static struct kvm_stats_debugfs_item {
69 const char *name;
1165f5fe 70 int offset;
6aa8b732
AK		 71 struct dentry *dentry;
72} debugfs_entries[] = {
1165f5fe
AK		 73 { "pf_fixed", STAT_OFFSET(pf_fixed) },
74 { "pf_guest", STAT_OFFSET(pf_guest) },
75 { "tlb_flush", STAT_OFFSET(tlb_flush) },
76 { "invlpg", STAT_OFFSET(invlpg) },
77 { "exits", STAT_OFFSET(exits) },
78 { "io_exits", STAT_OFFSET(io_exits) },
79 { "mmio_exits", STAT_OFFSET(mmio_exits) },
80 { "signal_exits", STAT_OFFSET(signal_exits) },
81 { "irq_window", STAT_OFFSET(irq_window_exits) },
82 { "halt_exits", STAT_OFFSET(halt_exits) },
b6958ce4 83 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
1165f5fe
AK		 84 { "request_irq", STAT_OFFSET(request_irq_exits) },
85 { "irq_exits", STAT_OFFSET(irq_exits) },
e6adf283 86 { "light_exits", STAT_OFFSET(light_exits) },
2cc51560 87 { "efer_reload", STAT_OFFSET(efer_reload) },
1165f5fe 88 { NULL }
6aa8b732
AK		 89};
90
91static struct dentry *debugfs_dir;
92
707d92fa
RR		 93#define CR0_RESERVED_BITS \
94 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
95 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
96 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
66aee91a
RR		 97#define CR4_RESERVED_BITS \
98 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
99 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
100 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
101 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
102
7075bc81 103#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
6aa8b732
AK		 104#define EFER_RESERVED_BITS 0xfffffffffffff2fe
105
05b3e0c2 106#ifdef CONFIG_X86_64
d77c26fc 107/* LDT or TSS descriptor in the GDT. 16 bytes. */
6aa8b732
AK		 108struct segment_descriptor_64 {
109 struct segment_descriptor s;
110 u32 base_higher;
111 u32 pad_zero;
112};
113
114#endif
115
bccf2150
AK		 116static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
117 unsigned long arg);
118
6aa8b732
AK		 119unsigned long segment_base(u16 selector)
120{
121 struct descriptor_table gdt;
122 struct segment_descriptor *d;
123 unsigned long table_base;
6aa8b732
AK		 124 unsigned long v;
125
126 if (selector == 0)
127 return 0;
128
d77c26fc 129 asm("sgdt %0" : "=m"(gdt));
6aa8b732
AK		 130 table_base = gdt.base;
131
132 if (selector & 4) { /* from ldt */
133 u16 ldt_selector;
134
d77c26fc 135 asm("sldt %0" : "=g"(ldt_selector));
6aa8b732
AK		 136 table_base = segment_base(ldt_selector);
137 }
138 d = (struct segment_descriptor *)(table_base + (selector & ~7));
d77c26fc
MD		 139 v = d->base_low | ((unsigned long)d->base_mid << 16) |
140 ((unsigned long)d->base_high << 24);
05b3e0c2 141#ifdef CONFIG_X86_64
d77c26fc
MD		 142 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
143 v |= ((unsigned long) \
144 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
6aa8b732
AK		 145#endif
146 return v;
147}
148EXPORT_SYMBOL_GPL(segment_base);
149
5aacf0ca
JM		 150static inline int valid_vcpu(int n)
151{
152 return likely(n >= 0 && n < KVM_MAX_VCPUS);
153}
154
7702fd1f
AK		 155void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
156{
157 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
158 return;
159
160 vcpu->guest_fpu_loaded = 1;
b114b080
RR		 161 fx_save(&vcpu->host_fx_image);
162 fx_restore(&vcpu->guest_fx_image);
7702fd1f
AK		 163}
164EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
165
166void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
167{
168 if (!vcpu->guest_fpu_loaded)
169 return;
170
171 vcpu->guest_fpu_loaded = 0;
b114b080
RR		 172 fx_save(&vcpu->guest_fx_image);
173 fx_restore(&vcpu->host_fx_image);
7702fd1f
AK		 174}
175EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
176
bccf2150
AK		 177/*
178 * Switches to specified vcpu, until a matching vcpu_put()
179 */
313a3dc7 180void vcpu_load(struct kvm_vcpu *vcpu)
6aa8b732 181{
15ad7146
AK		 182 int cpu;
183
bccf2150 184 mutex_lock(&vcpu->mutex);
15ad7146
AK		 185 cpu = get_cpu();
186 preempt_notifier_register(&vcpu->preempt_notifier);
313a3dc7 187 kvm_arch_vcpu_load(vcpu, cpu);
15ad7146 188 put_cpu();
6aa8b732
AK		 189}
190
313a3dc7 191void vcpu_put(struct kvm_vcpu *vcpu)
6aa8b732 192{
15ad7146 193 preempt_disable();
313a3dc7 194 kvm_arch_vcpu_put(vcpu);
15ad7146
AK		 195 preempt_notifier_unregister(&vcpu->preempt_notifier);
196 preempt_enable();
6aa8b732
AK		 197 mutex_unlock(&vcpu->mutex);
198}
199
d9e368d6
AK		 200static void ack_flush(void *_completed)
201{
d9e368d6
AK		 202}
203
204void kvm_flush_remote_tlbs(struct kvm *kvm)
205{
49d3bd7e 206 int i, cpu;
d9e368d6
AK		 207 cpumask_t cpus;
208 struct kvm_vcpu *vcpu;
d9e368d6 209
d9e368d6 210 cpus_clear(cpus);
fb3f0f51
RR		 211 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
212 vcpu = kvm->vcpus[i];
213 if (!vcpu)
214 continue;
3176bc3e 215 if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
d9e368d6
AK		 216 continue;
217 cpu = vcpu->cpu;
218 if (cpu != -1 && cpu != raw_smp_processor_id())
49d3bd7e 219 cpu_set(cpu, cpus);
d9e368d6 220 }
49d3bd7e 221 smp_call_function_mask(cpus, ack_flush, NULL, 1);
d9e368d6
AK		 222}
223
fb3f0f51
RR		 224int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
225{
226 struct page *page;
227 int r;
228
229 mutex_init(&vcpu->mutex);
230 vcpu->cpu = -1;
231 vcpu->mmu.root_hpa = INVALID_PAGE;
232 vcpu->kvm = kvm;
233 vcpu->vcpu_id = id;
c5ec1534
HQ		 234 if (!irqchip_in_kernel(kvm) || id == 0)
235 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
236 else
237 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
b6958ce4 238 init_waitqueue_head(&vcpu->wq);
fb3f0f51
RR		 239
240 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
241 if (!page) {
242 r = -ENOMEM;
243 goto fail;
244 }
245 vcpu->run = page_address(page);
246
247 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
248 if (!page) {
249 r = -ENOMEM;
250 goto fail_free_run;
251 }
252 vcpu->pio_data = page_address(page);
253
fb3f0f51
RR		 254 r = kvm_mmu_create(vcpu);
255 if (r < 0)
256 goto fail_free_pio_data;
257
76fafa5e
RR		 258 if (irqchip_in_kernel(kvm)) {
259 r = kvm_create_lapic(vcpu);
260 if (r < 0)
261 goto fail_mmu_destroy;
262 }
263
fb3f0f51
RR		 264 return 0;
265
76fafa5e
RR		 266fail_mmu_destroy:
267 kvm_mmu_destroy(vcpu);
fb3f0f51
RR		 268fail_free_pio_data:
269 free_page((unsigned long)vcpu->pio_data);
270fail_free_run:
271 free_page((unsigned long)vcpu->run);
272fail:
76fafa5e 273 return r;
fb3f0f51
RR		 274}
275EXPORT_SYMBOL_GPL(kvm_vcpu_init);
276
277void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
278{
d589444e 279 kvm_free_lapic(vcpu);
fb3f0f51
RR		 280 kvm_mmu_destroy(vcpu);
281 free_page((unsigned long)vcpu->pio_data);
282 free_page((unsigned long)vcpu->run);
283}
284EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
285
f17abe9a 286static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 287{
288 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
6aa8b732
AK		 289
290 if (!kvm)
f17abe9a 291 return ERR_PTR(-ENOMEM);
6aa8b732 292
74906345 293 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 294 mutex_init(&kvm->lock);
6aa8b732 295 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2eeb2e94 296 kvm_io_bus_init(&kvm->mmio_bus);
5e58cfe4
RR		 297 spin_lock(&kvm_lock);
298 list_add(&kvm->vm_list, &vm_list);
299 spin_unlock(&kvm_lock);
f17abe9a
AK		 300 return kvm;
301}
302
6fc138d2
IE		 303static void kvm_free_userspace_physmem(struct kvm_memory_slot *free)
304{
305 int i;
306
307 for (i = 0; i < free->npages; ++i) {
308 if (free->phys_mem[i]) {
309 if (!PageReserved(free->phys_mem[i]))
310 SetPageDirty(free->phys_mem[i]);
311 page_cache_release(free->phys_mem[i]);
312 }
313 }
314}
315
316static void kvm_free_kernel_physmem(struct kvm_memory_slot *free)
317{
318 int i;
319
320 for (i = 0; i < free->npages; ++i)
321 if (free->phys_mem[i])
322 __free_page(free->phys_mem[i]);
323}
324
6aa8b732
AK		 325/*
326 * Free any memory in @free but not in @dont.
327 */
328static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
329 struct kvm_memory_slot *dont)
330{
6aa8b732
AK		 331 if (!dont || free->phys_mem != dont->phys_mem)
332 if (free->phys_mem) {
6fc138d2
IE		 333 if (free->user_alloc)
334 kvm_free_userspace_physmem(free);
335 else
336 kvm_free_kernel_physmem(free);
6aa8b732
AK		 337 vfree(free->phys_mem);
338 }
290fc38d
IE		 339 if (!dont || free->rmap != dont->rmap)
340 vfree(free->rmap);
6aa8b732
AK		 341
342 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
343 vfree(free->dirty_bitmap);
344
8b6d44c7 345 free->phys_mem = NULL;
6aa8b732 346 free->npages = 0;
8b6d44c7 347 free->dirty_bitmap = NULL;
6aa8b732
AK		 348}
349
350static void kvm_free_physmem(struct kvm *kvm)
351{
352 int i;
353
354 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 355 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 356}
357
039576c0
AK		 358static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
359{
360 int i;
361
3077c451 362 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
039576c0
AK		 363 if (vcpu->pio.guest_pages[i]) {
364 __free_page(vcpu->pio.guest_pages[i]);
365 vcpu->pio.guest_pages[i] = NULL;
366 }
367}
368
7b53aa56
AK		 369static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
370{
7b53aa56
AK		 371 vcpu_load(vcpu);
372 kvm_mmu_unload(vcpu);
373 vcpu_put(vcpu);
374}
375
6aa8b732
AK		 376static void kvm_free_vcpus(struct kvm *kvm)
377{
378 unsigned int i;
379
7b53aa56
AK		 380 /*
381 * Unpin any mmu pages first.
382 */
383 for (i = 0; i < KVM_MAX_VCPUS; ++i)
fb3f0f51
RR		 384 if (kvm->vcpus[i])
385 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
386 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
387 if (kvm->vcpus[i]) {
cbdd1bea 388 kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
fb3f0f51
RR		 389 kvm->vcpus[i] = NULL;
390 }
391 }
392
6aa8b732
AK		 393}
394
f17abe9a
AK		 395static void kvm_destroy_vm(struct kvm *kvm)
396{
133de902
AK		 397 spin_lock(&kvm_lock);
398 list_del(&kvm->vm_list);
399 spin_unlock(&kvm_lock);
74906345 400 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 401 kvm_io_bus_destroy(&kvm->mmio_bus);
85f455f7 402 kfree(kvm->vpic);
1fd4f2a5 403 kfree(kvm->vioapic);
6aa8b732
AK		 404 kvm_free_vcpus(kvm);
405 kvm_free_physmem(kvm);
406 kfree(kvm);
f17abe9a
AK		 407}
408
409static int kvm_vm_release(struct inode *inode, struct file *filp)
410{
411 struct kvm *kvm = filp->private_data;
412
413 kvm_destroy_vm(kvm);
6aa8b732
AK		 414 return 0;
415}
416
417static void inject_gp(struct kvm_vcpu *vcpu)
418{
cbdd1bea 419 kvm_x86_ops->inject_gp(vcpu, 0);
6aa8b732
AK		 420}
421
1342d353
AK		 422/*
423 * Load the pae pdptrs. Return true is they are all valid.
424 */
425static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 426{
427 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 428 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732 429 int i;
1342d353 430 int ret;
c820c2aa 431 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
6aa8b732 432
11ec2804 433 mutex_lock(&vcpu->kvm->lock);
195aefde
IE		 434 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
435 offset * sizeof(u64), sizeof(pdpte));
436 if (ret < 0) {
c820c2aa
RR		 437 ret = 0;
438 goto out;
439 }
c820c2aa
RR		 440 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
441 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
1342d353
AK		 442 ret = 0;
443 goto out;
444 }
6aa8b732 445 }
c820c2aa 446 ret = 1;
6aa8b732 447
c820c2aa 448 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
1342d353 449out:
11ec2804 450 mutex_unlock(&vcpu->kvm->lock);
6aa8b732 451
1342d353 452 return ret;
6aa8b732
AK		 453}
454
455void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
456{
707d92fa 457 if (cr0 & CR0_RESERVED_BITS) {
6aa8b732
AK		 458 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
459 cr0, vcpu->cr0);
460 inject_gp(vcpu);
461 return;
462 }
463
707d92fa 464 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
6aa8b732
AK		 465 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
466 inject_gp(vcpu);
467 return;
468 }
469
707d92fa 470 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
6aa8b732
AK		 471 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
472 "and a clear PE flag\n");
473 inject_gp(vcpu);
474 return;
475 }
476
707d92fa 477 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
05b3e0c2 478#ifdef CONFIG_X86_64
6aa8b732
AK		 479 if ((vcpu->shadow_efer & EFER_LME)) {
480 int cs_db, cs_l;
481
482 if (!is_pae(vcpu)) {
483 printk(KERN_DEBUG "set_cr0: #GP, start paging "
484 "in long mode while PAE is disabled\n");
485 inject_gp(vcpu);
486 return;
487 }
cbdd1bea 488 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
6aa8b732
AK		 489 if (cs_l) {
490 printk(KERN_DEBUG "set_cr0: #GP, start paging "
491 "in long mode while CS.L == 1\n");
492 inject_gp(vcpu);
493 return;
494
495 }
496 } else
497#endif
1342d353 498 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 499 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
500 "reserved bits\n");
501 inject_gp(vcpu);
502 return;
503 }
504
505 }
506
cbdd1bea 507 kvm_x86_ops->set_cr0(vcpu, cr0);
6aa8b732
AK		 508 vcpu->cr0 = cr0;
509
11ec2804 510 mutex_lock(&vcpu->kvm->lock);
6aa8b732 511 kvm_mmu_reset_context(vcpu);
11ec2804 512 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 513 return;
514}
515EXPORT_SYMBOL_GPL(set_cr0);
516
517void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
518{
519 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
520}
521EXPORT_SYMBOL_GPL(lmsw);
522
523void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
524{
66aee91a 525 if (cr4 & CR4_RESERVED_BITS) {
6aa8b732
AK		 526 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
527 inject_gp(vcpu);
528 return;
529 }
530
a9058ecd 531 if (is_long_mode(vcpu)) {
66aee91a 532 if (!(cr4 & X86_CR4_PAE)) {
6aa8b732
AK		 533 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
534 "in long mode\n");
535 inject_gp(vcpu);
536 return;
537 }
66aee91a 538 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
1342d353 539 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 540 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
541 inject_gp(vcpu);
310bc76c 542 return;
6aa8b732
AK		 543 }
544
66aee91a 545 if (cr4 & X86_CR4_VMXE) {
6aa8b732
AK		 546 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
547 inject_gp(vcpu);
548 return;
549 }
cbdd1bea 550 kvm_x86_ops->set_cr4(vcpu, cr4);
81f50e3b 551 vcpu->cr4 = cr4;
11ec2804 552 mutex_lock(&vcpu->kvm->lock);
6aa8b732 553 kvm_mmu_reset_context(vcpu);
11ec2804 554 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 555}
556EXPORT_SYMBOL_GPL(set_cr4);
557
558void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
559{
a9058ecd 560 if (is_long_mode(vcpu)) {
f802a307 561 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
6aa8b732
AK		 562 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
563 inject_gp(vcpu);
564 return;
565 }
566 } else {
f802a307
RR		 567 if (is_pae(vcpu)) {
568 if (cr3 & CR3_PAE_RESERVED_BITS) {
569 printk(KERN_DEBUG
570 "set_cr3: #GP, reserved bits\n");
571 inject_gp(vcpu);
572 return;
573 }
574 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
575 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
576 "reserved bits\n");
577 inject_gp(vcpu);
578 return;
579 }
6aa8b732 580 }
21764863
RH		 581 /*
582 * We don't check reserved bits in nonpae mode, because
583 * this isn't enforced, and VMware depends on this.
584 */
6aa8b732
AK		 585 }
586
11ec2804 587 mutex_lock(&vcpu->kvm->lock);
d21225ee
IM		 588 /*
589 * Does the new cr3 value map to physical memory? (Note, we
590 * catch an invalid cr3 even in real-mode, because it would
591 * cause trouble later on when we turn on paging anyway.)
592 *
593 * A real CPU would silently accept an invalid cr3 and would
594 * attempt to use it - with largely undefined (and often hard
595 * to debug) behavior on the guest side.
596 */
597 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
598 inject_gp(vcpu);
fb764416
RR		 599 else {
600 vcpu->cr3 = cr3;
d21225ee 601 vcpu->mmu.new_cr3(vcpu);
fb764416 602 }
11ec2804 603 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 604}
605EXPORT_SYMBOL_GPL(set_cr3);
606
607void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
608{
7075bc81 609 if (cr8 & CR8_RESERVED_BITS) {
6aa8b732
AK		 610 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
611 inject_gp(vcpu);
612 return;
613 }
97222cc8
ED		 614 if (irqchip_in_kernel(vcpu->kvm))
615 kvm_lapic_set_tpr(vcpu, cr8);
616 else
617 vcpu->cr8 = cr8;
6aa8b732
AK		 618}
619EXPORT_SYMBOL_GPL(set_cr8);
620
7017fc3d
ED		 621unsigned long get_cr8(struct kvm_vcpu *vcpu)
622{
97222cc8
ED		 623 if (irqchip_in_kernel(vcpu->kvm))
624 return kvm_lapic_get_cr8(vcpu);
625 else
626 return vcpu->cr8;
7017fc3d
ED		 627}
628EXPORT_SYMBOL_GPL(get_cr8);
629
630u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
631{
97222cc8
ED		 632 if (irqchip_in_kernel(vcpu->kvm))
633 return vcpu->apic_base;
634 else
635 return vcpu->apic_base;
7017fc3d
ED		 636}
637EXPORT_SYMBOL_GPL(kvm_get_apic_base);
638
639void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
640{
97222cc8
ED		 641 /* TODO: reserve bits check */
642 if (irqchip_in_kernel(vcpu->kvm))
643 kvm_lapic_set_base(vcpu, data);
644 else
645 vcpu->apic_base = data;
7017fc3d
ED		 646}
647EXPORT_SYMBOL_GPL(kvm_set_apic_base);
648
6aa8b732
AK		 649void fx_init(struct kvm_vcpu *vcpu)
650{
b114b080 651 unsigned after_mxcsr_mask;
6aa8b732 652
9bd01506
RR		 653 /* Initialize guest FPU by resetting ours and saving into guest's */
654 preempt_disable();
b114b080 655 fx_save(&vcpu->host_fx_image);
6aa8b732 656 fpu_init();
b114b080
RR		 657 fx_save(&vcpu->guest_fx_image);
658 fx_restore(&vcpu->host_fx_image);
9bd01506 659 preempt_enable();
6aa8b732 660
380102c8 661 vcpu->cr0 |= X86_CR0_ET;
b114b080
RR		 662 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
663 vcpu->guest_fx_image.mxcsr = 0x1f80;
664 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
665 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
6aa8b732
AK		 666}
667EXPORT_SYMBOL_GPL(fx_init);
668
6aa8b732
AK		 669/*
670 * Allocate some memory and give it an address in the guest physical address
671 * space.
672 *
673 * Discontiguous memory is allowed, mostly for framebuffers.
674 */
2c6f5df9 675static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
6fc138d2
IE		 676 struct
677 kvm_userspace_memory_region *mem,
678 int user_alloc)
6aa8b732
AK		 679{
680 int r;
681 gfn_t base_gfn;
682 unsigned long npages;
683 unsigned long i;
684 struct kvm_memory_slot *memslot;
685 struct kvm_memory_slot old, new;
6aa8b732
AK		 686
687 r = -EINVAL;
688 /* General sanity checks */
689 if (mem->memory_size & (PAGE_SIZE - 1))
690 goto out;
691 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
692 goto out;
693 if (mem->slot >= KVM_MEMORY_SLOTS)
694 goto out;
695 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
696 goto out;
697
698 memslot = &kvm->memslots[mem->slot];
699 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
700 npages = mem->memory_size >> PAGE_SHIFT;
701
702 if (!npages)
703 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
704
11ec2804 705 mutex_lock(&kvm->lock);
6aa8b732 706
6aa8b732
AK		 707 new = old = *memslot;
708
709 new.base_gfn = base_gfn;
710 new.npages = npages;
711 new.flags = mem->flags;
712
713 /* Disallow changing a memory slot's size. */
714 r = -EINVAL;
715 if (npages && old.npages && npages != old.npages)
716 goto out_unlock;
717
718 /* Check for overlaps */
719 r = -EEXIST;
720 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
721 struct kvm_memory_slot *s = &kvm->memslots[i];
722
723 if (s == memslot)
724 continue;
725 if (!((base_gfn + npages <= s->base_gfn) ||
726 (base_gfn >= s->base_gfn + s->npages)))
727 goto out_unlock;
728 }
6aa8b732
AK		 729
730 /* Deallocate if slot is being removed */
731 if (!npages)
8b6d44c7 732 new.phys_mem = NULL;
6aa8b732
AK		 733
734 /* Free page dirty bitmap if unneeded */
735 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 736 new.dirty_bitmap = NULL;
6aa8b732
AK		 737
738 r = -ENOMEM;
739
740 /* Allocate if a slot is being created */
741 if (npages && !new.phys_mem) {
742 new.phys_mem = vmalloc(npages * sizeof(struct page *));
743
744 if (!new.phys_mem)
0d8d2bd4 745 goto out_unlock;
6aa8b732 746
d77c26fc 747 new.rmap = vmalloc(npages * sizeof(struct page *));
290fc38d
IE		 748
749 if (!new.rmap)
750 goto out_unlock;
751
6aa8b732 752 memset(new.phys_mem, 0, npages * sizeof(struct page *));
290fc38d 753 memset(new.rmap, 0, npages * sizeof(*new.rmap));
6fc138d2
IE		 754 if (user_alloc) {
755 unsigned long pages_num;
756
757 new.user_alloc = 1;
758 down_read(&current->mm->mmap_sem);
759
760 pages_num = get_user_pages(current, current->mm,
761 mem->userspace_addr,
762 npages, 1, 1, new.phys_mem,
763 NULL);
764
765 up_read(&current->mm->mmap_sem);
766 if (pages_num != npages)
0d8d2bd4 767 goto out_unlock;
6fc138d2
IE		 768 } else {
769 for (i = 0; i < npages; ++i) {
770 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
771 | __GFP_ZERO);
772 if (!new.phys_mem[i])
773 goto out_unlock;
774 }
6aa8b732
AK		 775 }
776 }
777
778 /* Allocate page dirty bitmap if needed */
779 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
780 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
781
782 new.dirty_bitmap = vmalloc(dirty_bytes);
783 if (!new.dirty_bitmap)
0d8d2bd4 784 goto out_unlock;
6aa8b732
AK		 785 memset(new.dirty_bitmap, 0, dirty_bytes);
786 }
787
6aa8b732
AK		 788 if (mem->slot >= kvm->nmemslots)
789 kvm->nmemslots = mem->slot + 1;
790
82ce2c96
IE		 791 if (!kvm->n_requested_mmu_pages) {
792 unsigned int n_pages;
793
794 if (npages) {
795 n_pages = npages * KVM_PERMILLE_MMU_PAGES / 1000;
796 kvm_mmu_change_mmu_pages(kvm, kvm->n_alloc_mmu_pages +
797 n_pages);
798 } else {
799 unsigned int nr_mmu_pages;
800
801 n_pages = old.npages * KVM_PERMILLE_MMU_PAGES / 1000;
802 nr_mmu_pages = kvm->n_alloc_mmu_pages - n_pages;
803 nr_mmu_pages = max(nr_mmu_pages,
804 (unsigned int) KVM_MIN_ALLOC_MMU_PAGES);
805 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
806 }
807 }
808
6aa8b732 809 *memslot = new;
6aa8b732 810
90cb0529
AK		 811 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
812 kvm_flush_remote_tlbs(kvm);
6aa8b732 813
11ec2804 814 mutex_unlock(&kvm->lock);
6aa8b732
AK		 815
816 kvm_free_physmem_slot(&old, &new);
817 return 0;
818
819out_unlock:
11ec2804 820 mutex_unlock(&kvm->lock);
6aa8b732
AK		 821 kvm_free_physmem_slot(&new, &old);
822out:
823 return r;
824}
825
82ce2c96
IE		 826static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
827 u32 kvm_nr_mmu_pages)
828{
829 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
830 return -EINVAL;
831
832 mutex_lock(&kvm->lock);
833
834 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
835 kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
836
837 mutex_unlock(&kvm->lock);
838 return 0;
839}
840
841static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
842{
843 return kvm->n_alloc_mmu_pages;
844}
845
6aa8b732
AK		 846/*
847 * Get (and clear) the dirty memory log for a memory slot.
848 */
2c6f5df9
AK		 849static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
850 struct kvm_dirty_log *log)
6aa8b732
AK		 851{
852 struct kvm_memory_slot *memslot;
853 int r, i;
854 int n;
855 unsigned long any = 0;
856
11ec2804 857 mutex_lock(&kvm->lock);
6aa8b732 858
6aa8b732
AK		 859 r = -EINVAL;
860 if (log->slot >= KVM_MEMORY_SLOTS)
861 goto out;
862
863 memslot = &kvm->memslots[log->slot];
864 r = -ENOENT;
865 if (!memslot->dirty_bitmap)
866 goto out;
867
cd1a4a98 868 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 869
cd1a4a98 870 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 871 any = memslot->dirty_bitmap[i];
872
873 r = -EFAULT;
874 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
875 goto out;
876
39214915
RR		 877 /* If nothing is dirty, don't bother messing with page tables. */
878 if (any) {
39214915
RR		 879 kvm_mmu_slot_remove_write_access(kvm, log->slot);
880 kvm_flush_remote_tlbs(kvm);
881 memset(memslot->dirty_bitmap, 0, n);
39214915 882 }
6aa8b732
AK		 883
884 r = 0;
885
886out:
11ec2804 887 mutex_unlock(&kvm->lock);
6aa8b732
AK		 888 return r;
889}
890
e8207547
AK		 891/*
892 * Set a new alias region. Aliases map a portion of physical memory into
893 * another portion. This is useful for memory windows, for example the PC
894 * VGA region.
895 */
896static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
897 struct kvm_memory_alias *alias)
898{
899 int r, n;
900 struct kvm_mem_alias *p;
901
902 r = -EINVAL;
903 /* General sanity checks */
904 if (alias->memory_size & (PAGE_SIZE - 1))
905 goto out;
906 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
907 goto out;
908 if (alias->slot >= KVM_ALIAS_SLOTS)
909 goto out;
910 if (alias->guest_phys_addr + alias->memory_size
911 < alias->guest_phys_addr)
912 goto out;
913 if (alias->target_phys_addr + alias->memory_size
914 < alias->target_phys_addr)
915 goto out;
916
11ec2804 917 mutex_lock(&kvm->lock);
e8207547
AK		 918
919 p = &kvm->aliases[alias->slot];
920 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
921 p->npages = alias->memory_size >> PAGE_SHIFT;
922 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
923
924 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
925 if (kvm->aliases[n - 1].npages)
926 break;
927 kvm->naliases = n;
928
90cb0529 929 kvm_mmu_zap_all(kvm);
e8207547 930
11ec2804 931 mutex_unlock(&kvm->lock);
e8207547
AK		 932
933 return 0;
934
935out:
936 return r;
937}
938
6ceb9d79
HQ		 939static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
940{
941 int r;
942
943 r = 0;
944 switch (chip->chip_id) {
945 case KVM_IRQCHIP_PIC_MASTER:
d77c26fc 946 memcpy(&chip->chip.pic,
6ceb9d79
HQ		 947 &pic_irqchip(kvm)->pics[0],
948 sizeof(struct kvm_pic_state));
949 break;
950 case KVM_IRQCHIP_PIC_SLAVE:
d77c26fc 951 memcpy(&chip->chip.pic,
6ceb9d79
HQ		 952 &pic_irqchip(kvm)->pics[1],
953 sizeof(struct kvm_pic_state));
954 break;
6bf9e962 955 case KVM_IRQCHIP_IOAPIC:
d77c26fc 956 memcpy(&chip->chip.ioapic,
6bf9e962
HQ		 957 ioapic_irqchip(kvm),
958 sizeof(struct kvm_ioapic_state));
959 break;
6ceb9d79
HQ		 960 default:
961 r = -EINVAL;
962 break;
963 }
964 return r;
965}
966
967static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
968{
969 int r;
970
971 r = 0;
972 switch (chip->chip_id) {
973 case KVM_IRQCHIP_PIC_MASTER:
d77c26fc 974 memcpy(&pic_irqchip(kvm)->pics[0],
6ceb9d79
HQ		 975 &chip->chip.pic,
976 sizeof(struct kvm_pic_state));
977 break;
978 case KVM_IRQCHIP_PIC_SLAVE:
d77c26fc 979 memcpy(&pic_irqchip(kvm)->pics[1],
6ceb9d79
HQ		 980 &chip->chip.pic,
981 sizeof(struct kvm_pic_state));
982 break;
6bf9e962 983 case KVM_IRQCHIP_IOAPIC:
d77c26fc 984 memcpy(ioapic_irqchip(kvm),
6bf9e962
HQ		 985 &chip->chip.ioapic,
986 sizeof(struct kvm_ioapic_state));
987 break;
6ceb9d79
HQ		 988 default:
989 r = -EINVAL;
990 break;
991 }
992 kvm_pic_update_irq(pic_irqchip(kvm));
993 return r;
994}
995
cea7bb21
IE		 996int is_error_page(struct page *page)
997{
998 return page == bad_page;
999}
1000EXPORT_SYMBOL_GPL(is_error_page);
1001
290fc38d 1002gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
e8207547
AK		 1003{
1004 int i;
1005 struct kvm_mem_alias *alias;
1006
1007 for (i = 0; i < kvm->naliases; ++i) {
1008 alias = &kvm->aliases[i];
1009 if (gfn >= alias->base_gfn
1010 && gfn < alias->base_gfn + alias->npages)
1011 return alias->target_gfn + gfn - alias->base_gfn;
1012 }
1013 return gfn;
1014}
1015
1016static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 1017{
1018 int i;
1019
1020 for (i = 0; i < kvm->nmemslots; ++i) {
1021 struct kvm_memory_slot *memslot = &kvm->memslots[i];
1022
1023 if (gfn >= memslot->base_gfn
1024 && gfn < memslot->base_gfn + memslot->npages)
1025 return memslot;
1026 }
8b6d44c7 1027 return NULL;
6aa8b732 1028}
e8207547
AK		 1029
1030struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
1031{
1032 gfn = unalias_gfn(kvm, gfn);
1033 return __gfn_to_memslot(kvm, gfn);
1034}
6aa8b732 1035
954bbbc2
AK		 1036struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
1037{
1038 struct kvm_memory_slot *slot;
1039
e8207547
AK		 1040 gfn = unalias_gfn(kvm, gfn);
1041 slot = __gfn_to_memslot(kvm, gfn);
954bbbc2 1042 if (!slot)
cea7bb21 1043 return bad_page;
954bbbc2
AK		 1044 return slot->phys_mem[gfn - slot->base_gfn];
1045}
1046EXPORT_SYMBOL_GPL(gfn_to_page);
1047
195aefde
IE		 1048static int next_segment(unsigned long len, int offset)
1049{
1050 if (len > PAGE_SIZE - offset)
1051 return PAGE_SIZE - offset;
1052 else
1053 return len;
1054}
1055
1056int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
1057 int len)
1058{
1059 void *page_virt;
1060 struct page *page;
1061
1062 page = gfn_to_page(kvm, gfn);
cea7bb21 1063 if (is_error_page(page))
195aefde
IE		 1064 return -EFAULT;
1065 page_virt = kmap_atomic(page, KM_USER0);
1066
1067 memcpy(data, page_virt + offset, len);
1068
1069 kunmap_atomic(page_virt, KM_USER0);
1070 return 0;
1071}
1072EXPORT_SYMBOL_GPL(kvm_read_guest_page);
1073
1074int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
1075{
1076 gfn_t gfn = gpa >> PAGE_SHIFT;
1077 int seg;
1078 int offset = offset_in_page(gpa);
1079 int ret;
1080
1081 while ((seg = next_segment(len, offset)) != 0) {
1082 ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
1083 if (ret < 0)
1084 return ret;
1085 offset = 0;
1086 len -= seg;
1087 data += seg;
1088 ++gfn;
1089 }
1090 return 0;
1091}
1092EXPORT_SYMBOL_GPL(kvm_read_guest);
1093
1094int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
1095 int offset, int len)
1096{
1097 void *page_virt;
1098 struct page *page;
1099
1100 page = gfn_to_page(kvm, gfn);
cea7bb21 1101 if (is_error_page(page))
195aefde
IE		 1102 return -EFAULT;
1103 page_virt = kmap_atomic(page, KM_USER0);
1104
1105 memcpy(page_virt + offset, data, len);
1106
1107 kunmap_atomic(page_virt, KM_USER0);
1108 mark_page_dirty(kvm, gfn);
1109 return 0;
1110}
1111EXPORT_SYMBOL_GPL(kvm_write_guest_page);
1112
1113int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
1114 unsigned long len)
1115{
1116 gfn_t gfn = gpa >> PAGE_SHIFT;
1117 int seg;
1118 int offset = offset_in_page(gpa);
1119 int ret;
1120
1121 while ((seg = next_segment(len, offset)) != 0) {
1122 ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
1123 if (ret < 0)
1124 return ret;
1125 offset = 0;
1126 len -= seg;
1127 data += seg;
1128 ++gfn;
1129 }
1130 return 0;
1131}
1132
1133int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
1134{
1135 void *page_virt;
1136 struct page *page;
1137
1138 page = gfn_to_page(kvm, gfn);
cea7bb21 1139 if (is_error_page(page))
195aefde
IE		 1140 return -EFAULT;
1141 page_virt = kmap_atomic(page, KM_USER0);
1142
1143 memset(page_virt + offset, 0, len);
1144
1145 kunmap_atomic(page_virt, KM_USER0);
1146 return 0;
1147}
1148EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
1149
1150int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
1151{
1152 gfn_t gfn = gpa >> PAGE_SHIFT;
1153 int seg;
1154 int offset = offset_in_page(gpa);
1155 int ret;
1156
1157 while ((seg = next_segment(len, offset)) != 0) {
1158 ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
1159 if (ret < 0)
1160 return ret;
1161 offset = 0;
1162 len -= seg;
1163 ++gfn;
1164 }
1165 return 0;
1166}
1167EXPORT_SYMBOL_GPL(kvm_clear_guest);
1168
7e9d619d 1169/* WARNING: Does not work on aliased pages. */
6aa8b732
AK		 1170void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
1171{
31389947 1172 struct kvm_memory_slot *memslot;
6aa8b732 1173
7e9d619d
RR		 1174 memslot = __gfn_to_memslot(kvm, gfn);
1175 if (memslot && memslot->dirty_bitmap) {
1176 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 1177
7e9d619d
RR		 1178 /* avoid RMW */
1179 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
1180 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 1181 }
1182}
1183
e7d5d76c 1184int emulator_read_std(unsigned long addr,
4c690a1e 1185 void *val,
6aa8b732 1186 unsigned int bytes,
cebff02b 1187 struct kvm_vcpu *vcpu)
6aa8b732 1188{
6aa8b732
AK		 1189 void *data = val;
1190
1191 while (bytes) {
1192 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1193 unsigned offset = addr & (PAGE_SIZE-1);
1194 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
195aefde 1195 int ret;
6aa8b732
AK		 1196
1197 if (gpa == UNMAPPED_GVA)
1198 return X86EMUL_PROPAGATE_FAULT;
195aefde
IE		 1199 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1200 if (ret < 0)
6aa8b732 1201 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1202
1203 bytes -= tocopy;
1204 data += tocopy;
1205 addr += tocopy;
1206 }
1207
1208 return X86EMUL_CONTINUE;
1209}
e7d5d76c 1210EXPORT_SYMBOL_GPL(emulator_read_std);
6aa8b732
AK		 1211
1212static int emulator_write_std(unsigned long addr,
4c690a1e 1213 const void *val,
6aa8b732 1214 unsigned int bytes,
cebff02b 1215 struct kvm_vcpu *vcpu)
6aa8b732 1216{
f0242478 1217 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
6aa8b732
AK		 1218 return X86EMUL_UNHANDLEABLE;
1219}
1220
97222cc8
ED		 1221/*
1222 * Only apic need an MMIO device hook, so shortcut now..
1223 */
1224static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1225 gpa_t addr)
1226{
1227 struct kvm_io_device *dev;
1228
1229 if (vcpu->apic) {
1230 dev = &vcpu->apic->dev;
1231 if (dev->in_range(dev, addr))
1232 return dev;
1233 }
1234 return NULL;
1235}
1236
2eeb2e94
GH		 1237static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1238 gpa_t addr)
1239{
97222cc8
ED		 1240 struct kvm_io_device *dev;
1241
1242 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1243 if (dev == NULL)
1244 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1245 return dev;
2eeb2e94
GH		 1246}
1247
74906345
ED		 1248static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1249 gpa_t addr)
1250{
1251 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1252}
1253
6aa8b732 1254static int emulator_read_emulated(unsigned long addr,
4c690a1e 1255 void *val,
6aa8b732 1256 unsigned int bytes,
cebff02b 1257 struct kvm_vcpu *vcpu)
6aa8b732 1258{
2eeb2e94
GH		 1259 struct kvm_io_device *mmio_dev;
1260 gpa_t gpa;
6aa8b732
AK		 1261
1262 if (vcpu->mmio_read_completed) {
1263 memcpy(val, vcpu->mmio_data, bytes);
1264 vcpu->mmio_read_completed = 0;
1265 return X86EMUL_CONTINUE;
cebff02b 1266 } else if (emulator_read_std(addr, val, bytes, vcpu)
6aa8b732
AK		 1267 == X86EMUL_CONTINUE)
1268 return X86EMUL_CONTINUE;
d27d4aca 1269
2eeb2e94
GH		 1270 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1271 if (gpa == UNMAPPED_GVA)
1272 return X86EMUL_PROPAGATE_FAULT;
6aa8b732 1273
2eeb2e94
GH		 1274 /*
1275 * Is this MMIO handled locally?
1276 */
1277 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1278 if (mmio_dev) {
1279 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1280 return X86EMUL_CONTINUE;
6aa8b732 1281 }
2eeb2e94
GH		 1282
1283 vcpu->mmio_needed = 1;
1284 vcpu->mmio_phys_addr = gpa;
1285 vcpu->mmio_size = bytes;
1286 vcpu->mmio_is_write = 0;
1287
1288 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1289}
1290
da4a00f0 1291static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
4c690a1e 1292 const void *val, int bytes)
da4a00f0 1293{
195aefde 1294 int ret;
da4a00f0 1295
195aefde
IE		 1296 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1297 if (ret < 0)
da4a00f0 1298 return 0;
fe551881 1299 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
da4a00f0
AK		 1300 return 1;
1301}
1302
b0fcd903
AK		 1303static int emulator_write_emulated_onepage(unsigned long addr,
1304 const void *val,
1305 unsigned int bytes,
cebff02b 1306 struct kvm_vcpu *vcpu)
6aa8b732 1307{
2eeb2e94
GH		 1308 struct kvm_io_device *mmio_dev;
1309 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
6aa8b732 1310
c9047f53 1311 if (gpa == UNMAPPED_GVA) {
cbdd1bea 1312 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
6aa8b732 1313 return X86EMUL_PROPAGATE_FAULT;
c9047f53 1314 }
6aa8b732 1315
da4a00f0
AK		 1316 if (emulator_write_phys(vcpu, gpa, val, bytes))
1317 return X86EMUL_CONTINUE;
1318
2eeb2e94
GH		 1319 /*
1320 * Is this MMIO handled locally?
1321 */
1322 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1323 if (mmio_dev) {
1324 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1325 return X86EMUL_CONTINUE;
1326 }
1327
6aa8b732
AK		 1328 vcpu->mmio_needed = 1;
1329 vcpu->mmio_phys_addr = gpa;
1330 vcpu->mmio_size = bytes;
1331 vcpu->mmio_is_write = 1;
4c690a1e 1332 memcpy(vcpu->mmio_data, val, bytes);
6aa8b732
AK		 1333
1334 return X86EMUL_CONTINUE;
1335}
1336
e7d5d76c 1337int emulator_write_emulated(unsigned long addr,
b0fcd903
AK		 1338 const void *val,
1339 unsigned int bytes,
cebff02b 1340 struct kvm_vcpu *vcpu)
b0fcd903
AK		 1341{
1342 /* Crossing a page boundary? */
1343 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1344 int rc, now;
1345
1346 now = -addr & ~PAGE_MASK;
cebff02b 1347 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
b0fcd903
AK		 1348 if (rc != X86EMUL_CONTINUE)
1349 return rc;
1350 addr += now;
1351 val += now;
1352 bytes -= now;
1353 }
cebff02b 1354 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
b0fcd903 1355}
e7d5d76c 1356EXPORT_SYMBOL_GPL(emulator_write_emulated);
b0fcd903 1357
6aa8b732 1358static int emulator_cmpxchg_emulated(unsigned long addr,
4c690a1e
AK		 1359 const void *old,
1360 const void *new,
6aa8b732 1361 unsigned int bytes,
cebff02b 1362 struct kvm_vcpu *vcpu)
6aa8b732
AK		 1363{
1364 static int reported;
1365
1366 if (!reported) {
1367 reported = 1;
1368 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1369 }
cebff02b 1370 return emulator_write_emulated(addr, new, bytes, vcpu);
6aa8b732
AK		 1371}
1372
1373static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1374{
cbdd1bea 1375 return kvm_x86_ops->get_segment_base(vcpu, seg);
6aa8b732
AK		 1376}
1377
1378int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1379{
6aa8b732
AK		 1380 return X86EMUL_CONTINUE;
1381}
1382
1383int emulate_clts(struct kvm_vcpu *vcpu)
1384{
404fb881 1385 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
6aa8b732
AK		 1386 return X86EMUL_CONTINUE;
1387}
1388
d77c26fc 1389int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
6aa8b732
AK		 1390{
1391 struct kvm_vcpu *vcpu = ctxt->vcpu;
1392
1393 switch (dr) {
1394 case 0 ... 3:
cbdd1bea 1395 *dest = kvm_x86_ops->get_dr(vcpu, dr);
6aa8b732
AK		 1396 return X86EMUL_CONTINUE;
1397 default:
f0242478 1398 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
6aa8b732
AK		 1399 return X86EMUL_UNHANDLEABLE;
1400 }
1401}
1402
1403int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1404{
1405 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1406 int exception;
1407
cbdd1bea 1408 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
6aa8b732
AK		 1409 if (exception) {
1410 /* FIXME: better handling */
1411 return X86EMUL_UNHANDLEABLE;
1412 }
1413 return X86EMUL_CONTINUE;
1414}
1415
054b1369 1416void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
6aa8b732
AK		 1417{
1418 static int reported;
1419 u8 opcodes[4];
054b1369 1420 unsigned long rip = vcpu->rip;
6aa8b732
AK		 1421 unsigned long rip_linear;
1422
054b1369 1423 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
6aa8b732
AK		 1424
1425 if (reported)
1426 return;
1427
054b1369 1428 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
6aa8b732 1429
054b1369
AK		 1430 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1431 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
6aa8b732
AK		 1432 reported = 1;
1433}
054b1369 1434EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
6aa8b732
AK		 1435
1436struct x86_emulate_ops emulate_ops = {
1437 .read_std = emulator_read_std,
1438 .write_std = emulator_write_std,
1439 .read_emulated = emulator_read_emulated,
1440 .write_emulated = emulator_write_emulated,
1441 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1442};
1443
1444int emulate_instruction(struct kvm_vcpu *vcpu,
1445 struct kvm_run *run,
1446 unsigned long cr2,
3427318f
LV		 1447 u16 error_code,
1448 int no_decode)
6aa8b732 1449{
a22436b7 1450 int r;
6aa8b732 1451
e7df56e4 1452 vcpu->mmio_fault_cr2 = cr2;
cbdd1bea 1453 kvm_x86_ops->cache_regs(vcpu);
6aa8b732 1454
6aa8b732 1455 vcpu->mmio_is_write = 0;
e70669ab 1456 vcpu->pio.string = 0;
3427318f
LV		 1457
1458 if (!no_decode) {
1459 int cs_db, cs_l;
1460 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1461
1462 vcpu->emulate_ctxt.vcpu = vcpu;
1463 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1464 vcpu->emulate_ctxt.cr2 = cr2;
1465 vcpu->emulate_ctxt.mode =
1466 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1467 ? X86EMUL_MODE_REAL : cs_l
1468 ? X86EMUL_MODE_PROT64 : cs_db
1469 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1470
1471 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1472 vcpu->emulate_ctxt.cs_base = 0;
1473 vcpu->emulate_ctxt.ds_base = 0;
1474 vcpu->emulate_ctxt.es_base = 0;
1475 vcpu->emulate_ctxt.ss_base = 0;
1476 } else {
1477 vcpu->emulate_ctxt.cs_base =
1478 get_segment_base(vcpu, VCPU_SREG_CS);
1479 vcpu->emulate_ctxt.ds_base =
1480 get_segment_base(vcpu, VCPU_SREG_DS);
1481 vcpu->emulate_ctxt.es_base =
1482 get_segment_base(vcpu, VCPU_SREG_ES);
1483 vcpu->emulate_ctxt.ss_base =
1484 get_segment_base(vcpu, VCPU_SREG_SS);
1485 }
1486
1487 vcpu->emulate_ctxt.gs_base =
1488 get_segment_base(vcpu, VCPU_SREG_GS);
1489 vcpu->emulate_ctxt.fs_base =
1490 get_segment_base(vcpu, VCPU_SREG_FS);
1491
1492 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
a22436b7
LV		 1493 if (r) {
1494 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1495 return EMULATE_DONE;
1496 return EMULATE_FAIL;
1497 }
3427318f
LV		 1498 }
1499
a22436b7 1500 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1be3aa47 1501
e70669ab
LV		 1502 if (vcpu->pio.string)
1503 return EMULATE_DO_MMIO;
6aa8b732
AK		 1504
1505 if ((r || vcpu->mmio_is_write) && run) {
8fc0d085 1506 run->exit_reason = KVM_EXIT_MMIO;
6aa8b732
AK		 1507 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1508 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1509 run->mmio.len = vcpu->mmio_size;
1510 run->mmio.is_write = vcpu->mmio_is_write;
1511 }
1512
1513 if (r) {
a436036b
AK		 1514 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1515 return EMULATE_DONE;
6aa8b732 1516 if (!vcpu->mmio_needed) {
054b1369 1517 kvm_report_emulation_failure(vcpu, "mmio");
6aa8b732
AK		 1518 return EMULATE_FAIL;
1519 }
1520 return EMULATE_DO_MMIO;
1521 }
1522
cbdd1bea 1523 kvm_x86_ops->decache_regs(vcpu);
3427318f 1524 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
6aa8b732 1525
02c83209
AK		 1526 if (vcpu->mmio_is_write) {
1527 vcpu->mmio_needed = 0;
6aa8b732 1528 return EMULATE_DO_MMIO;
02c83209 1529 }
6aa8b732
AK		 1530
1531 return EMULATE_DONE;
1532}
1533EXPORT_SYMBOL_GPL(emulate_instruction);
1534
b6958ce4
ED		 1535/*
1536 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1537 */
c5ec1534 1538static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
d3bef15f 1539{
b6958ce4
ED		 1540 DECLARE_WAITQUEUE(wait, current);
1541
1542 add_wait_queue(&vcpu->wq, &wait);
1543
1544 /*
1545 * We will block until either an interrupt or a signal wakes us up
1546 */
c5ec1534
HQ		 1547 while (!kvm_cpu_has_interrupt(vcpu)
1548 && !signal_pending(current)
1549 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
1550 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
b6958ce4
ED		 1551 set_current_state(TASK_INTERRUPTIBLE);
1552 vcpu_put(vcpu);
1553 schedule();
1554 vcpu_load(vcpu);
1555 }
d3bef15f 1556
c5ec1534 1557 __set_current_state(TASK_RUNNING);
b6958ce4 1558 remove_wait_queue(&vcpu->wq, &wait);
b6958ce4
ED		 1559}
1560
1561int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1562{
d3bef15f 1563 ++vcpu->stat.halt_exits;
b6958ce4 1564 if (irqchip_in_kernel(vcpu->kvm)) {
c5ec1534
HQ		 1565 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1566 kvm_vcpu_block(vcpu);
1567 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1568 return -EINTR;
b6958ce4
ED		 1569 return 1;
1570 } else {
1571 vcpu->run->exit_reason = KVM_EXIT_HLT;
1572 return 0;
1573 }
d3bef15f
AK		 1574}
1575EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1576
7aa81cc0 1577int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
270fd9b9 1578{
7aa81cc0 1579 unsigned long nr, a0, a1, a2, a3, ret;
270fd9b9 1580
cbdd1bea 1581 kvm_x86_ops->cache_regs(vcpu);
7aa81cc0
AL		 1582
1583 nr = vcpu->regs[VCPU_REGS_RAX];
1584 a0 = vcpu->regs[VCPU_REGS_RBX];
1585 a1 = vcpu->regs[VCPU_REGS_RCX];
1586 a2 = vcpu->regs[VCPU_REGS_RDX];
1587 a3 = vcpu->regs[VCPU_REGS_RSI];
1588
1589 if (!is_long_mode(vcpu)) {
1590 nr &= 0xFFFFFFFF;
1591 a0 &= 0xFFFFFFFF;
1592 a1 &= 0xFFFFFFFF;
1593 a2 &= 0xFFFFFFFF;
1594 a3 &= 0xFFFFFFFF;
270fd9b9 1595 }
7aa81cc0 1596
270fd9b9
AK		 1597 switch (nr) {
1598 default:
7aa81cc0
AL		 1599 ret = -KVM_ENOSYS;
1600 break;
270fd9b9
AK		 1601 }
1602 vcpu->regs[VCPU_REGS_RAX] = ret;
cbdd1bea 1603 kvm_x86_ops->decache_regs(vcpu);
7aa81cc0
AL		 1604 return 0;
1605}
1606EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1607
1608int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1609{
1610 char instruction[3];
1611 int ret = 0;
1612
1613 mutex_lock(&vcpu->kvm->lock);
1614
1615 /*
1616 * Blow out the MMU to ensure that no other VCPU has an active mapping
1617 * to ensure that the updated hypercall appears atomically across all
1618 * VCPUs.
1619 */
1620 kvm_mmu_zap_all(vcpu->kvm);
1621
1622 kvm_x86_ops->cache_regs(vcpu);
1623 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1624 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1625 != X86EMUL_CONTINUE)
1626 ret = -EFAULT;
1627
1628 mutex_unlock(&vcpu->kvm->lock);
1629
1630 return ret;
270fd9b9 1631}
270fd9b9 1632
6aa8b732
AK		 1633static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1634{
1635 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1636}
1637
1638void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1639{
1640 struct descriptor_table dt = { limit, base };
1641
cbdd1bea 1642 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 1643}
1644
1645void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1646{
1647 struct descriptor_table dt = { limit, base };
1648
cbdd1bea 1649 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 1650}
1651
1652void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1653 unsigned long *rflags)
1654{
1655 lmsw(vcpu, msw);
cbdd1bea 1656 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1657}
1658
1659unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1660{
cbdd1bea 1661 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 1662 switch (cr) {
1663 case 0:
1664 return vcpu->cr0;
1665 case 2:
1666 return vcpu->cr2;
1667 case 3:
1668 return vcpu->cr3;
1669 case 4:
1670 return vcpu->cr4;
1671 default:
1672 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1673 return 0;
1674 }
1675}
1676
1677void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1678 unsigned long *rflags)
1679{
1680 switch (cr) {
1681 case 0:
1682 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
cbdd1bea 1683 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1684 break;
1685 case 2:
1686 vcpu->cr2 = val;
1687 break;
1688 case 3:
1689 set_cr3(vcpu, val);
1690 break;
1691 case 4:
1692 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1693 break;
1694 default:
1695 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1696 }
1697}
1698
3bab1f5d
AK		 1699int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1700{
1701 u64 data;
1702
1703 switch (msr) {
1704 case 0xc0010010: /* SYSCFG */
1705 case 0xc0010015: /* HWCR */
1706 case MSR_IA32_PLATFORM_ID:
1707 case MSR_IA32_P5_MC_ADDR:
1708 case MSR_IA32_P5_MC_TYPE:
1709 case MSR_IA32_MC0_CTL:
1710 case MSR_IA32_MCG_STATUS:
1711 case MSR_IA32_MCG_CAP:
1712 case MSR_IA32_MC0_MISC:
1713 case MSR_IA32_MC0_MISC+4:
1714 case MSR_IA32_MC0_MISC+8:
1715 case MSR_IA32_MC0_MISC+12:
1716 case MSR_IA32_MC0_MISC+16:
1717 case MSR_IA32_UCODE_REV:
a8d13ea2 1718 case MSR_IA32_PERF_STATUS:
2dc7094b 1719 case MSR_IA32_EBL_CR_POWERON:
3bab1f5d
AK		 1720 /* MTRR registers */
1721 case 0xfe:
1722 case 0x200 ... 0x2ff:
1723 data = 0;
1724 break;
a8d13ea2
AK		 1725 case 0xcd: /* fsb frequency */
1726 data = 3;
1727 break;
3bab1f5d 1728 case MSR_IA32_APICBASE:
7017fc3d 1729 data = kvm_get_apic_base(vcpu);
3bab1f5d 1730 break;
6f00e68f
AK		 1731 case MSR_IA32_MISC_ENABLE:
1732 data = vcpu->ia32_misc_enable_msr;
1733 break;
3bab1f5d
AK		 1734#ifdef CONFIG_X86_64
1735 case MSR_EFER:
1736 data = vcpu->shadow_efer;
1737 break;
1738#endif
1739 default:
f0242478 1740 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
3bab1f5d
AK		 1741 return 1;
1742 }
1743 *pdata = data;
1744 return 0;
1745}
1746EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1747
6aa8b732
AK		 1748/*
1749 * Reads an msr value (of 'msr_index') into 'pdata'.
1750 * Returns 0 on success, non-0 otherwise.
1751 * Assumes vcpu_load() was already called.
1752 */
35f3f286 1753int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
6aa8b732 1754{
cbdd1bea 1755 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
6aa8b732
AK		 1756}
1757
05b3e0c2 1758#ifdef CONFIG_X86_64
6aa8b732 1759
3bab1f5d 1760static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1761{
6aa8b732
AK		 1762 if (efer & EFER_RESERVED_BITS) {
1763 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1764 efer);
1765 inject_gp(vcpu);
1766 return;
1767 }
1768
1769 if (is_paging(vcpu)
1770 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1771 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1772 inject_gp(vcpu);
1773 return;
1774 }
1775
cbdd1bea 1776 kvm_x86_ops->set_efer(vcpu, efer);
7725f0ba 1777
6aa8b732
AK		 1778 efer &= ~EFER_LMA;
1779 efer |= vcpu->shadow_efer & EFER_LMA;
1780
1781 vcpu->shadow_efer = efer;
6aa8b732 1782}
6aa8b732
AK		 1783
1784#endif
1785
3bab1f5d
AK		 1786int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1787{
1788 switch (msr) {
1789#ifdef CONFIG_X86_64
1790 case MSR_EFER:
1791 set_efer(vcpu, data);
1792 break;
1793#endif
1794 case MSR_IA32_MC0_STATUS:
f0242478 1795 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
3bab1f5d
AK		 1796 __FUNCTION__, data);
1797 break;
0e5bf0d0 1798 case MSR_IA32_MCG_STATUS:
f0242478 1799 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
0e5bf0d0
SK		 1800 __FUNCTION__, data);
1801 break;
3bab1f5d
AK		 1802 case MSR_IA32_UCODE_REV:
1803 case MSR_IA32_UCODE_WRITE:
1804 case 0x200 ... 0x2ff: /* MTRRs */
1805 break;
1806 case MSR_IA32_APICBASE:
7017fc3d 1807 kvm_set_apic_base(vcpu, data);
3bab1f5d 1808 break;
6f00e68f
AK		 1809 case MSR_IA32_MISC_ENABLE:
1810 vcpu->ia32_misc_enable_msr = data;
1811 break;
3bab1f5d 1812 default:
f0242478 1813 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
3bab1f5d
AK		 1814 return 1;
1815 }
1816 return 0;
1817}
1818EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1819
6aa8b732
AK		 1820/*
1821 * Writes msr value into into the appropriate "register".
1822 * Returns 0 on success, non-0 otherwise.
1823 * Assumes vcpu_load() was already called.
1824 */
35f3f286 1825int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
6aa8b732 1826{
cbdd1bea 1827 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
6aa8b732
AK		 1828}
1829
1830void kvm_resched(struct kvm_vcpu *vcpu)
1831{
3fca0365
YD		 1832 if (!need_resched())
1833 return;
6aa8b732 1834 cond_resched();
6aa8b732
AK		 1835}
1836EXPORT_SYMBOL_GPL(kvm_resched);
1837
06465c5a
AK		 1838void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1839{
1840 int i;
1841 u32 function;
1842 struct kvm_cpuid_entry *e, *best;
1843
cbdd1bea 1844 kvm_x86_ops->cache_regs(vcpu);
06465c5a
AK		 1845 function = vcpu->regs[VCPU_REGS_RAX];
1846 vcpu->regs[VCPU_REGS_RAX] = 0;
1847 vcpu->regs[VCPU_REGS_RBX] = 0;
1848 vcpu->regs[VCPU_REGS_RCX] = 0;
1849 vcpu->regs[VCPU_REGS_RDX] = 0;
1850 best = NULL;
1851 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1852 e = &vcpu->cpuid_entries[i];
1853 if (e->function == function) {
1854 best = e;
1855 break;
1856 }
1857 /*
1858 * Both basic or both extended?
1859 */
1860 if (((e->function ^ function) & 0x80000000) == 0)
1861 if (!best || e->function > best->function)
1862 best = e;
1863 }
1864 if (best) {
1865 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1866 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1867 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1868 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1869 }
cbdd1bea
CE		 1870 kvm_x86_ops->decache_regs(vcpu);
1871 kvm_x86_ops->skip_emulated_instruction(vcpu);
06465c5a
AK		 1872}
1873EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1874
039576c0 1875static int pio_copy_data(struct kvm_vcpu *vcpu)
46fc1477 1876{
039576c0
AK		 1877 void *p = vcpu->pio_data;
1878 void *q;
1879 unsigned bytes;
1880 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1881
039576c0
AK		 1882 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1883 PAGE_KERNEL);
1884 if (!q) {
039576c0
AK		 1885 free_pio_guest_pages(vcpu);
1886 return -ENOMEM;
1887 }
1888 q += vcpu->pio.guest_page_offset;
1889 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1890 if (vcpu->pio.in)
1891 memcpy(q, p, bytes);
1892 else
1893 memcpy(p, q, bytes);
1894 q -= vcpu->pio.guest_page_offset;
1895 vunmap(q);
039576c0
AK		 1896 free_pio_guest_pages(vcpu);
1897 return 0;
1898}
1899
1900static int complete_pio(struct kvm_vcpu *vcpu)
1901{
1902 struct kvm_pio_request *io = &vcpu->pio;
46fc1477 1903 long delta;
039576c0 1904 int r;
46fc1477 1905
cbdd1bea 1906 kvm_x86_ops->cache_regs(vcpu);
46fc1477
AK		 1907
1908 if (!io->string) {
039576c0
AK		 1909 if (io->in)
1910 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
46fc1477
AK		 1911 io->size);
1912 } else {
039576c0
AK		 1913 if (io->in) {
1914 r = pio_copy_data(vcpu);
1915 if (r) {
cbdd1bea 1916 kvm_x86_ops->cache_regs(vcpu);
039576c0
AK		 1917 return r;
1918 }
1919 }
1920
46fc1477
AK		 1921 delta = 1;
1922 if (io->rep) {
039576c0 1923 delta *= io->cur_count;
46fc1477
AK		 1924 /*
1925 * The size of the register should really depend on
1926 * current address size.
1927 */
1928 vcpu->regs[VCPU_REGS_RCX] -= delta;
1929 }
039576c0 1930 if (io->down)
46fc1477
AK		 1931 delta = -delta;
1932 delta *= io->size;
039576c0 1933 if (io->in)
46fc1477
AK		 1934 vcpu->regs[VCPU_REGS_RDI] += delta;
1935 else
1936 vcpu->regs[VCPU_REGS_RSI] += delta;
1937 }
1938
cbdd1bea 1939 kvm_x86_ops->decache_regs(vcpu);
46fc1477 1940
039576c0
AK		 1941 io->count -= io->cur_count;
1942 io->cur_count = 0;
1943
039576c0 1944 return 0;
46fc1477
AK		 1945}
1946
65619eb5
ED		 1947static void kernel_pio(struct kvm_io_device *pio_dev,
1948 struct kvm_vcpu *vcpu,
1949 void *pd)
74906345
ED		 1950{
1951 /* TODO: String I/O for in kernel device */
1952
9cf98828 1953 mutex_lock(&vcpu->kvm->lock);
74906345
ED		 1954 if (vcpu->pio.in)
1955 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1956 vcpu->pio.size,
65619eb5 1957 pd);
74906345
ED		 1958 else
1959 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1960 vcpu->pio.size,
65619eb5 1961 pd);
9cf98828 1962 mutex_unlock(&vcpu->kvm->lock);
65619eb5
ED		 1963}
1964
1965static void pio_string_write(struct kvm_io_device *pio_dev,
1966 struct kvm_vcpu *vcpu)
1967{
1968 struct kvm_pio_request *io = &vcpu->pio;
1969 void *pd = vcpu->pio_data;
1970 int i;
1971
9cf98828 1972 mutex_lock(&vcpu->kvm->lock);
65619eb5
ED		 1973 for (i = 0; i < io->cur_count; i++) {
1974 kvm_iodevice_write(pio_dev, io->port,
1975 io->size,
1976 pd);
1977 pd += io->size;
1978 }
9cf98828 1979 mutex_unlock(&vcpu->kvm->lock);
74906345
ED		 1980}
1981
d77c26fc 1982int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
3090dd73
LV		 1983 int size, unsigned port)
1984{
1985 struct kvm_io_device *pio_dev;
1986
1987 vcpu->run->exit_reason = KVM_EXIT_IO;
1988 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1989 vcpu->run->io.size = vcpu->pio.size = size;
1990 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1991 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1992 vcpu->run->io.port = vcpu->pio.port = port;
1993 vcpu->pio.in = in;
1994 vcpu->pio.string = 0;
1995 vcpu->pio.down = 0;
1996 vcpu->pio.guest_page_offset = 0;
1997 vcpu->pio.rep = 0;
1998
cbdd1bea 1999 kvm_x86_ops->cache_regs(vcpu);
3090dd73 2000 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
cbdd1bea 2001 kvm_x86_ops->decache_regs(vcpu);
3090dd73 2002
0967b7bf
AK		 2003 kvm_x86_ops->skip_emulated_instruction(vcpu);
2004
3090dd73
LV		 2005 pio_dev = vcpu_find_pio_dev(vcpu, port);
2006 if (pio_dev) {
2007 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
2008 complete_pio(vcpu);
2009 return 1;
2010 }
2011 return 0;
2012}
2013EXPORT_SYMBOL_GPL(kvm_emulate_pio);
2014
2015int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2016 int size, unsigned long count, int down,
039576c0
AK		 2017 gva_t address, int rep, unsigned port)
2018{
2019 unsigned now, in_page;
65619eb5 2020 int i, ret = 0;
039576c0
AK		 2021 int nr_pages = 1;
2022 struct page *page;
74906345 2023 struct kvm_io_device *pio_dev;
039576c0
AK		 2024
2025 vcpu->run->exit_reason = KVM_EXIT_IO;
2026 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3090dd73 2027 vcpu->run->io.size = vcpu->pio.size = size;
039576c0 2028 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3090dd73
LV		 2029 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
2030 vcpu->run->io.port = vcpu->pio.port = port;
039576c0 2031 vcpu->pio.in = in;
3090dd73 2032 vcpu->pio.string = 1;
039576c0
AK		 2033 vcpu->pio.down = down;
2034 vcpu->pio.guest_page_offset = offset_in_page(address);
2035 vcpu->pio.rep = rep;
2036
039576c0 2037 if (!count) {
cbdd1bea 2038 kvm_x86_ops->skip_emulated_instruction(vcpu);
039576c0
AK		 2039 return 1;
2040 }
2041
039576c0
AK		 2042 if (!down)
2043 in_page = PAGE_SIZE - offset_in_page(address);
2044 else
2045 in_page = offset_in_page(address) + size;
2046 now = min(count, (unsigned long)in_page / size);
2047 if (!now) {
2048 /*
2049 * String I/O straddles page boundary. Pin two guest pages
2050 * so that we satisfy atomicity constraints. Do just one
2051 * transaction to avoid complexity.
2052 */
2053 nr_pages = 2;
2054 now = 1;
2055 }
2056 if (down) {
2057 /*
2058 * String I/O in reverse. Yuck. Kill the guest, fix later.
2059 */
f0242478 2060 pr_unimpl(vcpu, "guest string pio down\n");
039576c0
AK		 2061 inject_gp(vcpu);
2062 return 1;
2063 }
2064 vcpu->run->io.count = now;
2065 vcpu->pio.cur_count = now;
2066
0967b7bf
AK		 2067 if (vcpu->pio.cur_count == vcpu->pio.count)
2068 kvm_x86_ops->skip_emulated_instruction(vcpu);
2069
039576c0 2070 for (i = 0; i < nr_pages; ++i) {
11ec2804 2071 mutex_lock(&vcpu->kvm->lock);
039576c0
AK		 2072 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
2073 if (page)
2074 get_page(page);
2075 vcpu->pio.guest_pages[i] = page;
11ec2804 2076 mutex_unlock(&vcpu->kvm->lock);
039576c0
AK		 2077 if (!page) {
2078 inject_gp(vcpu);
2079 free_pio_guest_pages(vcpu);
2080 return 1;
2081 }
2082 }
2083
3090dd73 2084 pio_dev = vcpu_find_pio_dev(vcpu, port);
65619eb5
ED		 2085 if (!vcpu->pio.in) {
2086 /* string PIO write */
2087 ret = pio_copy_data(vcpu);
2088 if (ret >= 0 && pio_dev) {
2089 pio_string_write(pio_dev, vcpu);
2090 complete_pio(vcpu);
2091 if (vcpu->pio.count == 0)
2092 ret = 1;
2093 }
2094 } else if (pio_dev)
f0242478 2095 pr_unimpl(vcpu, "no string pio read support yet, "
65619eb5
ED		 2096 "port %x size %d count %ld\n",
2097 port, size, count);
2098
2099 return ret;
039576c0 2100}
3090dd73 2101EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
039576c0 2102
04d2cc77
AK		 2103/*
2104 * Check if userspace requested an interrupt window, and that the
2105 * interrupt window is open.
2106 *
2107 * No need to exit to userspace if we already have an interrupt queued.
2108 */
2109static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2110 struct kvm_run *kvm_run)
2111{
2112 return (!vcpu->irq_summary &&
2113 kvm_run->request_interrupt_window &&
2114 vcpu->interrupt_window_open &&
2115 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
2116}
2117
2118static void post_kvm_run_save(struct kvm_vcpu *vcpu,
2119 struct kvm_run *kvm_run)
2120{
2121 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2122 kvm_run->cr8 = get_cr8(vcpu);
2123 kvm_run->apic_base = kvm_get_apic_base(vcpu);
2124 if (irqchip_in_kernel(vcpu->kvm))
2125 kvm_run->ready_for_interrupt_injection = 1;
2126 else
2127 kvm_run->ready_for_interrupt_injection =
2128 (vcpu->interrupt_window_open &&
2129 vcpu->irq_summary == 0);
2130}
2131
2132static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2133{
2134 int r;
2135
2136 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
d77c26fc 2137 pr_debug("vcpu %d received sipi with vector # %x\n",
04d2cc77
AK		 2138 vcpu->vcpu_id, vcpu->sipi_vector);
2139 kvm_lapic_reset(vcpu);
2140 kvm_x86_ops->vcpu_reset(vcpu);
2141 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
2142 }
2143
2144preempted:
2145 if (vcpu->guest_debug.enabled)
2146 kvm_x86_ops->guest_debug_pre(vcpu);
2147
2148again:
2149 r = kvm_mmu_reload(vcpu);
2150 if (unlikely(r))
2151 goto out;
2152
ab6ef34b
AK		 2153 kvm_inject_pending_timer_irqs(vcpu);
2154
04d2cc77
AK		 2155 preempt_disable();
2156
2157 kvm_x86_ops->prepare_guest_switch(vcpu);
2158 kvm_load_guest_fpu(vcpu);
2159
2160 local_irq_disable();
2161
2162 if (signal_pending(current)) {
2163 local_irq_enable();
2164 preempt_enable();
2165 r = -EINTR;
2166 kvm_run->exit_reason = KVM_EXIT_INTR;
2167 ++vcpu->stat.signal_exits;
2168 goto out;
2169 }
2170
2171 if (irqchip_in_kernel(vcpu->kvm))
2172 kvm_x86_ops->inject_pending_irq(vcpu);
2173 else if (!vcpu->mmio_read_completed)
2174 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2175
2176 vcpu->guest_mode = 1;
d172fcd3 2177 kvm_guest_enter();
04d2cc77
AK		 2178
2179 if (vcpu->requests)
3176bc3e 2180 if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
04d2cc77
AK		 2181 kvm_x86_ops->tlb_flush(vcpu);
2182
2183 kvm_x86_ops->run(vcpu, kvm_run);
2184
2185 vcpu->guest_mode = 0;
2186 local_irq_enable();
2187
2188 ++vcpu->stat.exits;
2189
0552f73b
LV		 2190 /*
2191 * We must have an instruction between local_irq_enable() and
2192 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2193 * the interrupt shadow. The stat.exits increment will do nicely.
2194 * But we need to prevent reordering, hence this barrier():
2195 */
2196 barrier();
2197
2198 kvm_guest_exit();
2199
04d2cc77
AK		 2200 preempt_enable();
2201
2202 /*
2203 * Profile KVM exit RIPs:
2204 */
2205 if (unlikely(prof_on == KVM_PROFILING)) {
2206 kvm_x86_ops->cache_regs(vcpu);
2207 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2208 }
2209
2210 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2211
2212 if (r > 0) {
2213 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2214 r = -EINTR;
2215 kvm_run->exit_reason = KVM_EXIT_INTR;
2216 ++vcpu->stat.request_irq_exits;
2217 goto out;
2218 }
2219 if (!need_resched()) {
2220 ++vcpu->stat.light_exits;
2221 goto again;
2222 }
2223 }
2224
2225out:
2226 if (r > 0) {
2227 kvm_resched(vcpu);
2228 goto preempted;
2229 }
2230
2231 post_kvm_run_save(vcpu, kvm_run);
2232
2233 return r;
2234}
2235
2236
bccf2150 2237static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 2238{
6aa8b732 2239 int r;
1961d276 2240 sigset_t sigsaved;
6aa8b732 2241
bccf2150 2242 vcpu_load(vcpu);
6aa8b732 2243
c5ec1534
HQ		 2244 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2245 kvm_vcpu_block(vcpu);
2246 vcpu_put(vcpu);
2247 return -EAGAIN;
2248 }
2249
1961d276
AK		 2250 if (vcpu->sigset_active)
2251 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2252
54810342 2253 /* re-sync apic's tpr */
5cd4f6fd
HQ		 2254 if (!irqchip_in_kernel(vcpu->kvm))
2255 set_cr8(vcpu, kvm_run->cr8);
54810342 2256
02c83209
AK		 2257 if (vcpu->pio.cur_count) {
2258 r = complete_pio(vcpu);
2259 if (r)
2260 goto out;
2261 }
2262
2263 if (vcpu->mmio_needed) {
2264 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2265 vcpu->mmio_read_completed = 1;
2266 vcpu->mmio_needed = 0;
2267 r = emulate_instruction(vcpu, kvm_run,
3427318f 2268 vcpu->mmio_fault_cr2, 0, 1);
02c83209
AK		 2269 if (r == EMULATE_DO_MMIO) {
2270 /*
2271 * Read-modify-write. Back to userspace.
2272 */
02c83209
AK		 2273 r = 0;
2274 goto out;
46fc1477 2275 }
6aa8b732
AK		 2276 }
2277
8eb7d334 2278 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
cbdd1bea 2279 kvm_x86_ops->cache_regs(vcpu);
b4e63f56 2280 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
cbdd1bea 2281 kvm_x86_ops->decache_regs(vcpu);
b4e63f56
AK		 2282 }
2283
04d2cc77 2284 r = __vcpu_run(vcpu, kvm_run);
6aa8b732 2285
039576c0 2286out:
1961d276
AK		 2287 if (vcpu->sigset_active)
2288 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2289
6aa8b732
AK		 2290 vcpu_put(vcpu);
2291 return r;
2292}
2293
bccf2150
AK		 2294static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2295 struct kvm_regs *regs)
6aa8b732 2296{
bccf2150 2297 vcpu_load(vcpu);
6aa8b732 2298
cbdd1bea 2299 kvm_x86_ops->cache_regs(vcpu);
6aa8b732
AK		 2300
2301 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2302 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2303 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2304 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2305 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2306 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2307 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2308 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 2309#ifdef CONFIG_X86_64
6aa8b732
AK		 2310 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2311 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2312 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2313 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2314 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2315 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2316 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2317 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2318#endif
2319
2320 regs->rip = vcpu->rip;
cbdd1bea 2321 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 2322
2323 /*
2324 * Don't leak debug flags in case they were set for guest debugging
2325 */
2326 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2327 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2328
2329 vcpu_put(vcpu);
2330
2331 return 0;
2332}
2333
bccf2150
AK		 2334static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2335 struct kvm_regs *regs)
6aa8b732 2336{
bccf2150 2337 vcpu_load(vcpu);
6aa8b732
AK		 2338
2339 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2340 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2341 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2342 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2343 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2344 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2345 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2346 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 2347#ifdef CONFIG_X86_64
6aa8b732
AK		 2348 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2349 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2350 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2351 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2352 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2353 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2354 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2355 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2356#endif
2357
2358 vcpu->rip = regs->rip;
cbdd1bea 2359 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
6aa8b732 2360
cbdd1bea 2361 kvm_x86_ops->decache_regs(vcpu);
6aa8b732
AK		 2362
2363 vcpu_put(vcpu);
2364
2365 return 0;
2366}
2367
2368static void get_segment(struct kvm_vcpu *vcpu,
2369 struct kvm_segment *var, int seg)
2370{
cbdd1bea 2371 return kvm_x86_ops->get_segment(vcpu, var, seg);
6aa8b732
AK		 2372}
2373
bccf2150
AK		 2374static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2375 struct kvm_sregs *sregs)
6aa8b732 2376{
6aa8b732 2377 struct descriptor_table dt;
2a8067f1 2378 int pending_vec;
6aa8b732 2379
bccf2150 2380 vcpu_load(vcpu);
6aa8b732
AK		 2381
2382 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2383 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2384 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2385 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2386 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2387 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2388
2389 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2390 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2391
cbdd1bea 2392 kvm_x86_ops->get_idt(vcpu, &dt);
6aa8b732
AK		 2393 sregs->idt.limit = dt.limit;
2394 sregs->idt.base = dt.base;
cbdd1bea 2395 kvm_x86_ops->get_gdt(vcpu, &dt);
6aa8b732
AK		 2396 sregs->gdt.limit = dt.limit;
2397 sregs->gdt.base = dt.base;
2398
cbdd1bea 2399 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 2400 sregs->cr0 = vcpu->cr0;
2401 sregs->cr2 = vcpu->cr2;
2402 sregs->cr3 = vcpu->cr3;
2403 sregs->cr4 = vcpu->cr4;
7017fc3d 2404 sregs->cr8 = get_cr8(vcpu);
6aa8b732 2405 sregs->efer = vcpu->shadow_efer;
7017fc3d 2406 sregs->apic_base = kvm_get_apic_base(vcpu);
6aa8b732 2407
2a8067f1 2408 if (irqchip_in_kernel(vcpu->kvm)) {
c52fb35a
HQ		 2409 memset(sregs->interrupt_bitmap, 0,
2410 sizeof sregs->interrupt_bitmap);
cbdd1bea 2411 pending_vec = kvm_x86_ops->get_irq(vcpu);
2a8067f1 2412 if (pending_vec >= 0)
d77c26fc
MD		 2413 set_bit(pending_vec,
2414 (unsigned long *)sregs->interrupt_bitmap);
2a8067f1 2415 } else
c52fb35a
HQ		 2416 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2417 sizeof sregs->interrupt_bitmap);
6aa8b732
AK		 2418
2419 vcpu_put(vcpu);
2420
2421 return 0;
2422}
2423
2424static void set_segment(struct kvm_vcpu *vcpu,
2425 struct kvm_segment *var, int seg)
2426{
cbdd1bea 2427 return kvm_x86_ops->set_segment(vcpu, var, seg);
6aa8b732
AK		 2428}
2429
bccf2150
AK		 2430static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2431 struct kvm_sregs *sregs)
6aa8b732 2432{
6aa8b732 2433 int mmu_reset_needed = 0;
2a8067f1 2434 int i, pending_vec, max_bits;
6aa8b732
AK		 2435 struct descriptor_table dt;
2436
bccf2150 2437 vcpu_load(vcpu);
6aa8b732 2438
6aa8b732
AK		 2439 dt.limit = sregs->idt.limit;
2440 dt.base = sregs->idt.base;
cbdd1bea 2441 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 2442 dt.limit = sregs->gdt.limit;
2443 dt.base = sregs->gdt.base;
cbdd1bea 2444 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 2445
2446 vcpu->cr2 = sregs->cr2;
2447 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2448 vcpu->cr3 = sregs->cr3;
2449
7017fc3d 2450 set_cr8(vcpu, sregs->cr8);
6aa8b732
AK		 2451
2452 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 2453#ifdef CONFIG_X86_64
cbdd1bea 2454 kvm_x86_ops->set_efer(vcpu, sregs->efer);
6aa8b732 2455#endif
7017fc3d 2456 kvm_set_apic_base(vcpu, sregs->apic_base);
6aa8b732 2457
cbdd1bea 2458 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
399badf3 2459
6aa8b732 2460 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
81f50e3b 2461 vcpu->cr0 = sregs->cr0;
cbdd1bea 2462 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
6aa8b732
AK		 2463
2464 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
cbdd1bea 2465 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 2466 if (!is_long_mode(vcpu) && is_pae(vcpu))
2467 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 2468
2469 if (mmu_reset_needed)
2470 kvm_mmu_reset_context(vcpu);
2471
c52fb35a
HQ		 2472 if (!irqchip_in_kernel(vcpu->kvm)) {
2473 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2474 sizeof vcpu->irq_pending);
2475 vcpu->irq_summary = 0;
2476 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2477 if (vcpu->irq_pending[i])
2478 __set_bit(i, &vcpu->irq_summary);
2a8067f1
ED		 2479 } else {
2480 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2481 pending_vec = find_first_bit(
2482 (const unsigned long *)sregs->interrupt_bitmap,
2483 max_bits);
2484 /* Only pending external irq is handled here */
2485 if (pending_vec < max_bits) {
cbdd1bea 2486 kvm_x86_ops->set_irq(vcpu, pending_vec);
d77c26fc
MD		 2487 pr_debug("Set back pending irq %d\n",
2488 pending_vec);
2a8067f1 2489 }
c52fb35a 2490 }
6aa8b732 2491
024aa1c0
AK		 2492 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2493 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2494 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2495 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2496 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2497 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2498
2499 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2500 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2501
6aa8b732
AK		 2502 vcpu_put(vcpu);
2503
2504 return 0;
2505}
2506
1747fb71
RR		 2507void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2508{
2509 struct kvm_segment cs;
2510
2511 get_segment(vcpu, &cs, VCPU_SREG_CS);
2512 *db = cs.db;
2513 *l = cs.l;
2514}
2515EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2516
6aa8b732
AK		 2517/*
2518 * Translate a guest virtual address to a guest physical address.
2519 */
bccf2150
AK		 2520static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2521 struct kvm_translation *tr)
6aa8b732
AK		 2522{
2523 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 2524 gpa_t gpa;
2525
bccf2150 2526 vcpu_load(vcpu);
11ec2804 2527 mutex_lock(&vcpu->kvm->lock);
6aa8b732
AK		 2528 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2529 tr->physical_address = gpa;
2530 tr->valid = gpa != UNMAPPED_GVA;
2531 tr->writeable = 1;
2532 tr->usermode = 0;
11ec2804 2533 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 2534 vcpu_put(vcpu);
2535
2536 return 0;
2537}
2538
bccf2150
AK		 2539static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2540 struct kvm_interrupt *irq)
6aa8b732 2541{
6aa8b732
AK		 2542 if (irq->irq < 0 || irq->irq >= 256)
2543 return -EINVAL;
97222cc8
ED		 2544 if (irqchip_in_kernel(vcpu->kvm))
2545 return -ENXIO;
bccf2150 2546 vcpu_load(vcpu);
6aa8b732
AK		 2547
2548 set_bit(irq->irq, vcpu->irq_pending);
2549 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2550
2551 vcpu_put(vcpu);
2552
2553 return 0;
2554}
2555
bccf2150
AK		 2556static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2557 struct kvm_debug_guest *dbg)
6aa8b732 2558{
6aa8b732
AK		 2559 int r;
2560
bccf2150 2561 vcpu_load(vcpu);
6aa8b732 2562
cbdd1bea 2563 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
6aa8b732
AK		 2564
2565 vcpu_put(vcpu);
2566
2567 return r;
2568}
2569
9a2bb7f4
AK		 2570static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2571 unsigned long address,
2572 int *type)
2573{
2574 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2575 unsigned long pgoff;
2576 struct page *page;
2577
9a2bb7f4 2578 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
039576c0
AK		 2579 if (pgoff == 0)
2580 page = virt_to_page(vcpu->run);
2581 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2582 page = virt_to_page(vcpu->pio_data);
2583 else
9a2bb7f4 2584 return NOPAGE_SIGBUS;
9a2bb7f4 2585 get_page(page);
cd0d9137
NAQ		 2586 if (type != NULL)
2587 *type = VM_FAULT_MINOR;
2588
9a2bb7f4
AK		 2589 return page;
2590}
2591
2592static struct vm_operations_struct kvm_vcpu_vm_ops = {
2593 .nopage = kvm_vcpu_nopage,
2594};
2595
2596static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2597{
2598 vma->vm_ops = &kvm_vcpu_vm_ops;
2599 return 0;
2600}
2601
bccf2150
AK		 2602static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2603{
2604 struct kvm_vcpu *vcpu = filp->private_data;
2605
2606 fput(vcpu->kvm->filp);
2607 return 0;
2608}
2609
2610static struct file_operations kvm_vcpu_fops = {
2611 .release = kvm_vcpu_release,
2612 .unlocked_ioctl = kvm_vcpu_ioctl,
2613 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 2614 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 2615};
2616
2617/*
2618 * Allocates an inode for the vcpu.
2619 */
2620static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2621{
2622 int fd, r;
2623 struct inode *inode;
2624 struct file *file;
2625
d6d28168
AK		 2626 r = anon_inode_getfd(&fd, &inode, &file,
2627 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2628 if (r)
2629 return r;
bccf2150 2630 atomic_inc(&vcpu->kvm->filp->f_count);
bccf2150 2631 return fd;
bccf2150
AK		 2632}
2633
c5ea7660
AK		 2634/*
2635 * Creates some virtual cpus. Good luck creating more than one.
2636 */
2637static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2638{
2639 int r;
2640 struct kvm_vcpu *vcpu;
2641
c5ea7660 2642 if (!valid_vcpu(n))
fb3f0f51 2643 return -EINVAL;
c5ea7660 2644
cbdd1bea 2645 vcpu = kvm_x86_ops->vcpu_create(kvm, n);
fb3f0f51
RR		 2646 if (IS_ERR(vcpu))
2647 return PTR_ERR(vcpu);
c5ea7660 2648
15ad7146
AK		 2649 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2650
b114b080
RR		 2651 /* We do fxsave: this must be aligned. */
2652 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2653
fb3f0f51 2654 vcpu_load(vcpu);
c5ea7660 2655 r = kvm_mmu_setup(vcpu);
c5ea7660 2656 vcpu_put(vcpu);
c5ea7660 2657 if (r < 0)
fb3f0f51
RR		 2658 goto free_vcpu;
2659
11ec2804 2660 mutex_lock(&kvm->lock);
fb3f0f51
RR		 2661 if (kvm->vcpus[n]) {
2662 r = -EEXIST;
11ec2804 2663 mutex_unlock(&kvm->lock);
fb3f0f51
RR		 2664 goto mmu_unload;
2665 }
2666 kvm->vcpus[n] = vcpu;
11ec2804 2667 mutex_unlock(&kvm->lock);
c5ea7660 2668
fb3f0f51 2669 /* Now it's all set up, let userspace reach it */
bccf2150
AK		 2670 r = create_vcpu_fd(vcpu);
2671 if (r < 0)
fb3f0f51
RR		 2672 goto unlink;
2673 return r;
39c3b86e 2674
fb3f0f51 2675unlink:
11ec2804 2676 mutex_lock(&kvm->lock);
fb3f0f51 2677 kvm->vcpus[n] = NULL;
11ec2804 2678 mutex_unlock(&kvm->lock);
a2fa3e9f 2679
fb3f0f51
RR		 2680mmu_unload:
2681 vcpu_load(vcpu);
2682 kvm_mmu_unload(vcpu);
2683 vcpu_put(vcpu);
c5ea7660 2684
fb3f0f51 2685free_vcpu:
cbdd1bea 2686 kvm_x86_ops->vcpu_free(vcpu);
c5ea7660
AK		 2687 return r;
2688}
2689
1961d276
AK		 2690static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2691{
2692 if (sigset) {
2693 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2694 vcpu->sigset_active = 1;
2695 vcpu->sigset = *sigset;
2696 } else
2697 vcpu->sigset_active = 0;
2698 return 0;
2699}
2700
b8836737
AK		 2701/*
2702 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2703 * we have asm/x86/processor.h
2704 */
2705struct fxsave {
2706 u16 cwd;
2707 u16 swd;
2708 u16 twd;
2709 u16 fop;
2710 u64 rip;
2711 u64 rdp;
2712 u32 mxcsr;
2713 u32 mxcsr_mask;
2714 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2715#ifdef CONFIG_X86_64
2716 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2717#else
2718 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2719#endif
2720};
2721
2722static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2723{
b114b080 2724 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2725
2726 vcpu_load(vcpu);
2727
2728 memcpy(fpu->fpr, fxsave->st_space, 128);
2729 fpu->fcw = fxsave->cwd;
2730 fpu->fsw = fxsave->swd;
2731 fpu->ftwx = fxsave->twd;
2732 fpu->last_opcode = fxsave->fop;
2733 fpu->last_ip = fxsave->rip;
2734 fpu->last_dp = fxsave->rdp;
2735 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2736
2737 vcpu_put(vcpu);
2738
2739 return 0;
2740}
2741
2742static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2743{
b114b080 2744 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2745
2746 vcpu_load(vcpu);
2747
2748 memcpy(fxsave->st_space, fpu->fpr, 128);
2749 fxsave->cwd = fpu->fcw;
2750 fxsave->swd = fpu->fsw;
2751 fxsave->twd = fpu->ftwx;
2752 fxsave->fop = fpu->last_opcode;
2753 fxsave->rip = fpu->last_ip;
2754 fxsave->rdp = fpu->last_dp;
2755 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2756
2757 vcpu_put(vcpu);
2758
2759 return 0;
2760}
2761
bccf2150
AK		 2762static long kvm_vcpu_ioctl(struct file *filp,
2763 unsigned int ioctl, unsigned long arg)
6aa8b732 2764{
bccf2150 2765 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 2766 void __user *argp = (void __user *)arg;
313a3dc7 2767 int r;
6aa8b732
AK		 2768
2769 switch (ioctl) {
9a2bb7f4 2770 case KVM_RUN:
f0fe5108
AK		 2771 r = -EINVAL;
2772 if (arg)
2773 goto out;
9a2bb7f4 2774 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 2775 break;
6aa8b732
AK		 2776 case KVM_GET_REGS: {
2777 struct kvm_regs kvm_regs;
2778
bccf2150
AK		 2779 memset(&kvm_regs, 0, sizeof kvm_regs);
2780 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2781 if (r)
2782 goto out;
2783 r = -EFAULT;
2f366987 2784 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2785 goto out;
2786 r = 0;
2787 break;
2788 }
2789 case KVM_SET_REGS: {
2790 struct kvm_regs kvm_regs;
2791
2792 r = -EFAULT;
2f366987 2793 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2794 goto out;
bccf2150 2795 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2796 if (r)
2797 goto out;
2798 r = 0;
2799 break;
2800 }
2801 case KVM_GET_SREGS: {
2802 struct kvm_sregs kvm_sregs;
2803
bccf2150
AK		 2804 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2805 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2806 if (r)
2807 goto out;
2808 r = -EFAULT;
2f366987 2809 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2810 goto out;
2811 r = 0;
2812 break;
2813 }
2814 case KVM_SET_SREGS: {
2815 struct kvm_sregs kvm_sregs;
2816
2817 r = -EFAULT;
2f366987 2818 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2819 goto out;
bccf2150 2820 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2821 if (r)
2822 goto out;
2823 r = 0;
2824 break;
2825 }
2826 case KVM_TRANSLATE: {
2827 struct kvm_translation tr;
2828
2829 r = -EFAULT;
2f366987 2830 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2831 goto out;
bccf2150 2832 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2833 if (r)
2834 goto out;
2835 r = -EFAULT;
2f366987 2836 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2837 goto out;
2838 r = 0;
2839 break;
2840 }
2841 case KVM_INTERRUPT: {
2842 struct kvm_interrupt irq;
2843
2844 r = -EFAULT;
2f366987 2845 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2846 goto out;
bccf2150 2847 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2848 if (r)
2849 goto out;
2850 r = 0;
2851 break;
2852 }
2853 case KVM_DEBUG_GUEST: {
2854 struct kvm_debug_guest dbg;
2855
2856 r = -EFAULT;
2f366987 2857 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2858 goto out;
bccf2150 2859 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2860 if (r)
2861 goto out;
2862 r = 0;
2863 break;
2864 }
1961d276
AK		 2865 case KVM_SET_SIGNAL_MASK: {
2866 struct kvm_signal_mask __user *sigmask_arg = argp;
2867 struct kvm_signal_mask kvm_sigmask;
2868 sigset_t sigset, *p;
2869
2870 p = NULL;
2871 if (argp) {
2872 r = -EFAULT;
2873 if (copy_from_user(&kvm_sigmask, argp,
2874 sizeof kvm_sigmask))
2875 goto out;
2876 r = -EINVAL;
2877 if (kvm_sigmask.len != sizeof sigset)
2878 goto out;
2879 r = -EFAULT;
2880 if (copy_from_user(&sigset, sigmask_arg->sigset,
2881 sizeof sigset))
2882 goto out;
2883 p = &sigset;
2884 }
2885 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2886 break;
2887 }
b8836737
AK		 2888 case KVM_GET_FPU: {
2889 struct kvm_fpu fpu;
2890
2891 memset(&fpu, 0, sizeof fpu);
2892 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2893 if (r)
2894 goto out;
2895 r = -EFAULT;
2896 if (copy_to_user(argp, &fpu, sizeof fpu))
2897 goto out;
2898 r = 0;
2899 break;
2900 }
2901 case KVM_SET_FPU: {
2902 struct kvm_fpu fpu;
2903
2904 r = -EFAULT;
2905 if (copy_from_user(&fpu, argp, sizeof fpu))
2906 goto out;
2907 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2908 if (r)
2909 goto out;
2910 r = 0;
2911 break;
2912 }
bccf2150 2913 default:
313a3dc7 2914 r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
bccf2150
AK		 2915 }
2916out:
2917 return r;
2918}
2919
2920static long kvm_vm_ioctl(struct file *filp,
2921 unsigned int ioctl, unsigned long arg)
2922{
2923 struct kvm *kvm = filp->private_data;
2924 void __user *argp = (void __user *)arg;
2925 int r = -EINVAL;
2926
2927 switch (ioctl) {
2928 case KVM_CREATE_VCPU:
2929 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2930 if (r < 0)
2931 goto out;
2932 break;
6aa8b732
AK		 2933 case KVM_SET_MEMORY_REGION: {
2934 struct kvm_memory_region kvm_mem;
6fc138d2 2935 struct kvm_userspace_memory_region kvm_userspace_mem;
6aa8b732
AK		 2936
2937 r = -EFAULT;
2f366987 2938 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 2939 goto out;
6fc138d2
IE		 2940 kvm_userspace_mem.slot = kvm_mem.slot;
2941 kvm_userspace_mem.flags = kvm_mem.flags;
2942 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
2943 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
2944 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
2945 if (r)
2946 goto out;
2947 break;
2948 }
2949 case KVM_SET_USER_MEMORY_REGION: {
2950 struct kvm_userspace_memory_region kvm_userspace_mem;
2951
2952 r = -EFAULT;
2953 if (copy_from_user(&kvm_userspace_mem, argp,
2954 sizeof kvm_userspace_mem))
2955 goto out;
2956
2957 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
6aa8b732
AK		 2958 if (r)
2959 goto out;
2960 break;
2961 }
82ce2c96
IE		 2962 case KVM_SET_NR_MMU_PAGES:
2963 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
2964 if (r)
2965 goto out;
2966 break;
2967 case KVM_GET_NR_MMU_PAGES:
2968 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
2969 break;
6aa8b732
AK		 2970 case KVM_GET_DIRTY_LOG: {
2971 struct kvm_dirty_log log;
2972
2973 r = -EFAULT;
2f366987 2974 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 2975 goto out;
2c6f5df9 2976 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 2977 if (r)
2978 goto out;
2979 break;
2980 }
e8207547
AK		 2981 case KVM_SET_MEMORY_ALIAS: {
2982 struct kvm_memory_alias alias;
2983
2984 r = -EFAULT;
2985 if (copy_from_user(&alias, argp, sizeof alias))
2986 goto out;
2987 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
2988 if (r)
2989 goto out;
2990 break;
2991 }
85f455f7
ED		 2992 case KVM_CREATE_IRQCHIP:
2993 r = -ENOMEM;
2994 kvm->vpic = kvm_create_pic(kvm);
1fd4f2a5
ED		 2995 if (kvm->vpic) {
2996 r = kvm_ioapic_init(kvm);
2997 if (r) {
2998 kfree(kvm->vpic);
2999 kvm->vpic = NULL;
3000 goto out;
3001 }
d77c26fc 3002 } else
85f455f7
ED		 3003 goto out;
3004 break;
3005 case KVM_IRQ_LINE: {
3006 struct kvm_irq_level irq_event;
3007
3008 r = -EFAULT;
3009 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3010 goto out;
3011 if (irqchip_in_kernel(kvm)) {
9cf98828 3012 mutex_lock(&kvm->lock);
85f455f7
ED		 3013 if (irq_event.irq < 16)
3014 kvm_pic_set_irq(pic_irqchip(kvm),
3015 irq_event.irq,
3016 irq_event.level);
1fd4f2a5
ED		 3017 kvm_ioapic_set_irq(kvm->vioapic,
3018 irq_event.irq,
3019 irq_event.level);
9cf98828 3020 mutex_unlock(&kvm->lock);
85f455f7
ED		 3021 r = 0;
3022 }
3023 break;
3024 }
6ceb9d79
HQ		 3025 case KVM_GET_IRQCHIP: {
3026 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3027 struct kvm_irqchip chip;
3028
3029 r = -EFAULT;
3030 if (copy_from_user(&chip, argp, sizeof chip))
3031 goto out;
3032 r = -ENXIO;
3033 if (!irqchip_in_kernel(kvm))
3034 goto out;
3035 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
3036 if (r)
3037 goto out;
3038 r = -EFAULT;
3039 if (copy_to_user(argp, &chip, sizeof chip))
3040 goto out;
3041 r = 0;
3042 break;
3043 }
3044 case KVM_SET_IRQCHIP: {
3045 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3046 struct kvm_irqchip chip;
3047
3048 r = -EFAULT;
3049 if (copy_from_user(&chip, argp, sizeof chip))
3050 goto out;
3051 r = -ENXIO;
3052 if (!irqchip_in_kernel(kvm))
3053 goto out;
3054 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
3055 if (r)
3056 goto out;
3057 r = 0;
3058 break;
3059 }
f17abe9a
AK		 3060 default:
3061 ;
3062 }
3063out:
3064 return r;
3065}
3066
3067static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3068 unsigned long address,
3069 int *type)
3070{
3071 struct kvm *kvm = vma->vm_file->private_data;
3072 unsigned long pgoff;
f17abe9a
AK		 3073 struct page *page;
3074
f17abe9a 3075 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
954bbbc2 3076 page = gfn_to_page(kvm, pgoff);
cea7bb21 3077 if (is_error_page(page))
f17abe9a
AK		 3078 return NOPAGE_SIGBUS;
3079 get_page(page);
cd0d9137
NAQ		 3080 if (type != NULL)
3081 *type = VM_FAULT_MINOR;
3082
f17abe9a
AK		 3083 return page;
3084}
3085
3086static struct vm_operations_struct kvm_vm_vm_ops = {
3087 .nopage = kvm_vm_nopage,
3088};
3089
3090static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3091{
3092 vma->vm_ops = &kvm_vm_vm_ops;
3093 return 0;
3094}
3095
3096static struct file_operations kvm_vm_fops = {
3097 .release = kvm_vm_release,
3098 .unlocked_ioctl = kvm_vm_ioctl,
3099 .compat_ioctl = kvm_vm_ioctl,
3100 .mmap = kvm_vm_mmap,
3101};
3102
3103static int kvm_dev_ioctl_create_vm(void)
3104{
3105 int fd, r;
3106 struct inode *inode;
3107 struct file *file;
3108 struct kvm *kvm;
3109
f17abe9a 3110 kvm = kvm_create_vm();
d6d28168
AK		 3111 if (IS_ERR(kvm))
3112 return PTR_ERR(kvm);
3113 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3114 if (r) {
3115 kvm_destroy_vm(kvm);
3116 return r;
f17abe9a
AK		 3117 }
3118
bccf2150 3119 kvm->filp = file;
f17abe9a 3120
f17abe9a 3121 return fd;
f17abe9a
AK		 3122}
3123
3124static long kvm_dev_ioctl(struct file *filp,
3125 unsigned int ioctl, unsigned long arg)
3126{
3127 void __user *argp = (void __user *)arg;
07c45a36 3128 long r = -EINVAL;
f17abe9a
AK		 3129
3130 switch (ioctl) {
3131 case KVM_GET_API_VERSION:
f0fe5108
AK		 3132 r = -EINVAL;
3133 if (arg)
3134 goto out;
f17abe9a
AK		 3135 r = KVM_API_VERSION;
3136 break;
3137 case KVM_CREATE_VM:
f0fe5108
AK		 3138 r = -EINVAL;
3139 if (arg)
3140 goto out;
f17abe9a
AK		 3141 r = kvm_dev_ioctl_create_vm();
3142 break;
85f455f7
ED		 3143 case KVM_CHECK_EXTENSION: {
3144 int ext = (long)argp;
3145
3146 switch (ext) {
3147 case KVM_CAP_IRQCHIP:
b6958ce4 3148 case KVM_CAP_HLT:
82ce2c96 3149 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
6fc138d2 3150 case KVM_CAP_USER_MEMORY:
85f455f7
ED		 3151 r = 1;
3152 break;
3153 default:
3154 r = 0;
3155 break;
3156 }
5d308f45 3157 break;
85f455f7 3158 }
07c45a36
AK		 3159 case KVM_GET_VCPU_MMAP_SIZE:
3160 r = -EINVAL;
3161 if (arg)
3162 goto out;
039576c0 3163 r = 2 * PAGE_SIZE;
07c45a36 3164 break;
6aa8b732 3165 default:
043405e1 3166 return kvm_arch_dev_ioctl(filp, ioctl, arg);
6aa8b732
AK		 3167 }
3168out:
3169 return r;
3170}
3171
6aa8b732 3172static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 3173 .unlocked_ioctl = kvm_dev_ioctl,
3174 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 3175};
3176
3177static struct miscdevice kvm_dev = {
bbe4432e 3178 KVM_MINOR,
6aa8b732
AK		 3179 "kvm",
3180 &kvm_chardev_ops,
3181};
3182
774c47f1
AK		 3183/*
3184 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3185 * cached on it.
3186 */
3187static void decache_vcpus_on_cpu(int cpu)
3188{
3189 struct kvm *vm;
3190 struct kvm_vcpu *vcpu;
3191 int i;
3192
3193 spin_lock(&kvm_lock);
11ec2804 3194 list_for_each_entry(vm, &vm_list, vm_list)
774c47f1 3195 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3196 vcpu = vm->vcpus[i];
3197 if (!vcpu)
3198 continue;
774c47f1
AK		 3199 /*
3200 * If the vcpu is locked, then it is running on some
3201 * other cpu and therefore it is not cached on the
3202 * cpu in question.
3203 *
3204 * If it's not locked, check the last cpu it executed
3205 * on.
3206 */
3207 if (mutex_trylock(&vcpu->mutex)) {
3208 if (vcpu->cpu == cpu) {
cbdd1bea 3209 kvm_x86_ops->vcpu_decache(vcpu);
774c47f1
AK		 3210 vcpu->cpu = -1;
3211 }
3212 mutex_unlock(&vcpu->mutex);
3213 }
3214 }
3215 spin_unlock(&kvm_lock);
3216}
3217
1b6c0168
AK		 3218static void hardware_enable(void *junk)
3219{
3220 int cpu = raw_smp_processor_id();
3221
3222 if (cpu_isset(cpu, cpus_hardware_enabled))
3223 return;
3224 cpu_set(cpu, cpus_hardware_enabled);
cbdd1bea 3225 kvm_x86_ops->hardware_enable(NULL);
1b6c0168
AK		 3226}
3227
3228static void hardware_disable(void *junk)
3229{
3230 int cpu = raw_smp_processor_id();
3231
3232 if (!cpu_isset(cpu, cpus_hardware_enabled))
3233 return;
3234 cpu_clear(cpu, cpus_hardware_enabled);
3235 decache_vcpus_on_cpu(cpu);
cbdd1bea 3236 kvm_x86_ops->hardware_disable(NULL);
1b6c0168
AK		 3237}
3238
774c47f1
AK		 3239static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3240 void *v)
3241{
3242 int cpu = (long)v;
3243
3244 switch (val) {
cec9ad27
AK		 3245 case CPU_DYING:
3246 case CPU_DYING_FROZEN:
6ec8a856
AK		 3247 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3248 cpu);
3249 hardware_disable(NULL);
3250 break;
774c47f1 3251 case CPU_UP_CANCELED:
8bb78442 3252 case CPU_UP_CANCELED_FROZEN:
43934a38
JK		 3253 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3254 cpu);
1b6c0168 3255 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
774c47f1 3256 break;
43934a38 3257 case CPU_ONLINE:
8bb78442 3258 case CPU_ONLINE_FROZEN:
43934a38
JK		 3259 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3260 cpu);
1b6c0168 3261 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
774c47f1
AK		 3262 break;
3263 }
3264 return NOTIFY_OK;
3265}
3266
9a2b85c6 3267static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
d77c26fc 3268 void *v)
9a2b85c6
RR		 3269{
3270 if (val == SYS_RESTART) {
3271 /*
3272 * Some (well, at least mine) BIOSes hang on reboot if
3273 * in vmx root mode.
3274 */
3275 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3276 on_each_cpu(hardware_disable, NULL, 0, 1);
3277 }
3278 return NOTIFY_OK;
3279}
3280
3281static struct notifier_block kvm_reboot_notifier = {
3282 .notifier_call = kvm_reboot,
3283 .priority = 0,
3284};
3285
2eeb2e94
GH		 3286void kvm_io_bus_init(struct kvm_io_bus *bus)
3287{
3288 memset(bus, 0, sizeof(*bus));
3289}
3290
3291void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3292{
3293 int i;
3294
3295 for (i = 0; i < bus->dev_count; i++) {
3296 struct kvm_io_device *pos = bus->devs[i];
3297
3298 kvm_iodevice_destructor(pos);
3299 }
3300}
3301
3302struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3303{
3304 int i;
3305
3306 for (i = 0; i < bus->dev_count; i++) {
3307 struct kvm_io_device *pos = bus->devs[i];
3308
3309 if (pos->in_range(pos, addr))
3310 return pos;
3311 }
3312
3313 return NULL;
3314}
3315
3316void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3317{
3318 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3319
3320 bus->devs[bus->dev_count++] = dev;
3321}
3322
774c47f1
AK		 3323static struct notifier_block kvm_cpu_notifier = {
3324 .notifier_call = kvm_cpu_hotplug,
3325 .priority = 20, /* must be > scheduler priority */
3326};
3327
1165f5fe
AK		 3328static u64 stat_get(void *_offset)
3329{
3330 unsigned offset = (long)_offset;
3331 u64 total = 0;
3332 struct kvm *kvm;
3333 struct kvm_vcpu *vcpu;
3334 int i;
3335
3336 spin_lock(&kvm_lock);
3337 list_for_each_entry(kvm, &vm_list, vm_list)
3338 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3339 vcpu = kvm->vcpus[i];
3340 if (vcpu)
3341 total += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 3342 }
3343 spin_unlock(&kvm_lock);
3344 return total;
3345}
3346
3dea7ca7 3347DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
1165f5fe 3348
6aa8b732
AK		 3349static __init void kvm_init_debug(void)
3350{
3351 struct kvm_stats_debugfs_item *p;
3352
8b6d44c7 3353 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 3354 for (p = debugfs_entries; p->name; ++p)
1165f5fe
AK		 3355 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3356 (void *)(long)p->offset,
3357 &stat_fops);
6aa8b732
AK		 3358}
3359
3360static void kvm_exit_debug(void)
3361{
3362 struct kvm_stats_debugfs_item *p;
3363
3364 for (p = debugfs_entries; p->name; ++p)
3365 debugfs_remove(p->dentry);
3366 debugfs_remove(debugfs_dir);
3367}
3368
59ae6c6b
AK		 3369static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3370{
4267c41a 3371 hardware_disable(NULL);
59ae6c6b
AK		 3372 return 0;
3373}
3374
3375static int kvm_resume(struct sys_device *dev)
3376{
4267c41a 3377 hardware_enable(NULL);
59ae6c6b
AK		 3378 return 0;
3379}
3380
3381static struct sysdev_class kvm_sysdev_class = {
af5ca3f4 3382 .name = "kvm",
59ae6c6b
AK		 3383 .suspend = kvm_suspend,
3384 .resume = kvm_resume,
3385};
3386
3387static struct sys_device kvm_sysdev = {
3388 .id = 0,
3389 .cls = &kvm_sysdev_class,
3390};
3391
cea7bb21 3392struct page *bad_page;
6aa8b732 3393
15ad7146
AK		 3394static inline
3395struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3396{
3397 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3398}
3399
3400static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3401{
3402 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3403
cbdd1bea 3404 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146
AK		 3405}
3406
3407static void kvm_sched_out(struct preempt_notifier *pn,
3408 struct task_struct *next)
3409{
3410 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3411
cbdd1bea 3412 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 3413}
3414
cbdd1bea 3415int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
c16f862d 3416 struct module *module)
6aa8b732
AK		 3417{
3418 int r;
002c7f7c 3419 int cpu;
6aa8b732 3420
cbdd1bea 3421 if (kvm_x86_ops) {
09db28b8
YI		 3422 printk(KERN_ERR "kvm: already loaded the other module\n");
3423 return -EEXIST;
3424 }
3425
e097f35c 3426 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 3427 printk(KERN_ERR "kvm: no hardware support\n");
3428 return -EOPNOTSUPP;
3429 }
e097f35c 3430 if (ops->disabled_by_bios()) {
6aa8b732
AK		 3431 printk(KERN_ERR "kvm: disabled by bios\n");
3432 return -EOPNOTSUPP;
3433 }
3434
cbdd1bea 3435 kvm_x86_ops = ops;
e097f35c 3436
cbdd1bea 3437 r = kvm_x86_ops->hardware_setup();
6aa8b732 3438 if (r < 0)
ca45aaae 3439 goto out;
6aa8b732 3440
002c7f7c
YS		 3441 for_each_online_cpu(cpu) {
3442 smp_call_function_single(cpu,
cbdd1bea 3443 kvm_x86_ops->check_processor_compatibility,
002c7f7c
YS		 3444 &r, 0, 1);
3445 if (r < 0)
3446 goto out_free_0;
3447 }
3448
1b6c0168 3449 on_each_cpu(hardware_enable, NULL, 0, 1);
774c47f1
AK		 3450 r = register_cpu_notifier(&kvm_cpu_notifier);
3451 if (r)
3452 goto out_free_1;
6aa8b732
AK		 3453 register_reboot_notifier(&kvm_reboot_notifier);
3454
59ae6c6b
AK		 3455 r = sysdev_class_register(&kvm_sysdev_class);
3456 if (r)
3457 goto out_free_2;
3458
3459 r = sysdev_register(&kvm_sysdev);
3460 if (r)
3461 goto out_free_3;
3462
c16f862d
RR		 3463 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3464 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3465 __alignof__(struct kvm_vcpu), 0, 0);
3466 if (!kvm_vcpu_cache) {
3467 r = -ENOMEM;
3468 goto out_free_4;
3469 }
3470
6aa8b732
AK		 3471 kvm_chardev_ops.owner = module;
3472
3473 r = misc_register(&kvm_dev);
3474 if (r) {
d77c26fc 3475 printk(KERN_ERR "kvm: misc device register failed\n");
6aa8b732
AK		 3476 goto out_free;
3477 }
3478
15ad7146
AK		 3479 kvm_preempt_ops.sched_in = kvm_sched_in;
3480 kvm_preempt_ops.sched_out = kvm_sched_out;
3481
c7addb90
AK		 3482 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
3483
3484 return 0;
6aa8b732
AK		 3485
3486out_free:
c16f862d
RR		 3487 kmem_cache_destroy(kvm_vcpu_cache);
3488out_free_4:
59ae6c6b
AK		 3489 sysdev_unregister(&kvm_sysdev);
3490out_free_3:
3491 sysdev_class_unregister(&kvm_sysdev_class);
3492out_free_2:
6aa8b732 3493 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 3494 unregister_cpu_notifier(&kvm_cpu_notifier);
3495out_free_1:
1b6c0168 3496 on_each_cpu(hardware_disable, NULL, 0, 1);
002c7f7c 3497out_free_0:
cbdd1bea 3498 kvm_x86_ops->hardware_unsetup();
ca45aaae 3499out:
cbdd1bea 3500 kvm_x86_ops = NULL;
6aa8b732
AK		 3501 return r;
3502}
d77c26fc 3503EXPORT_SYMBOL_GPL(kvm_init_x86);
6aa8b732 3504
cbdd1bea 3505void kvm_exit_x86(void)
6aa8b732
AK		 3506{
3507 misc_deregister(&kvm_dev);
c16f862d 3508 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 3509 sysdev_unregister(&kvm_sysdev);
3510 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 3511 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 3512 unregister_cpu_notifier(&kvm_cpu_notifier);
1b6c0168 3513 on_each_cpu(hardware_disable, NULL, 0, 1);
cbdd1bea
CE		 3514 kvm_x86_ops->hardware_unsetup();
3515 kvm_x86_ops = NULL;
6aa8b732 3516}
d77c26fc 3517EXPORT_SYMBOL_GPL(kvm_exit_x86);
6aa8b732
AK		 3518
3519static __init int kvm_init(void)
3520{
37e29d90
AK		 3521 int r;
3522
b5a33a75
AK		 3523 r = kvm_mmu_module_init();
3524 if (r)
3525 goto out4;
3526
6aa8b732
AK		 3527 kvm_init_debug();
3528
043405e1 3529 kvm_arch_init();
bf591b24 3530
cea7bb21 3531 bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
d77c26fc
MD		 3532
3533 if (bad_page == NULL) {
6aa8b732
AK		 3534 r = -ENOMEM;
3535 goto out;
3536 }
3537
58e690e6 3538 return 0;
6aa8b732
AK		 3539
3540out:
3541 kvm_exit_debug();
b5a33a75
AK		 3542 kvm_mmu_module_exit();
3543out4:
6aa8b732
AK		 3544 return r;
3545}
3546
3547static __exit void kvm_exit(void)
3548{
3549 kvm_exit_debug();
cea7bb21 3550 __free_page(bad_page);
b5a33a75 3551 kvm_mmu_module_exit();
6aa8b732
AK		 3552}
3553
3554module_init(kvm_init)
3555module_exit(kvm_exit)
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