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KVM: Remove the usage of page->private field by rmap
[deliverable/linux.git] / drivers / kvm / kvm_main.c
CommitLineData
6aa8b732
AK		 1/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 *
9 * Authors:
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
12 *
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
15 *
16 */
17
18#include "kvm.h"
e495606d
AK		 19#include "x86_emulate.h"
20#include "segment_descriptor.h"
85f455f7 21#include "irq.h"
6aa8b732
AK		 22
23#include <linux/kvm.h>
24#include <linux/module.h>
25#include <linux/errno.h>
6aa8b732
AK		 26#include <linux/percpu.h>
27#include <linux/gfp.h>
6aa8b732
AK		 28#include <linux/mm.h>
29#include <linux/miscdevice.h>
30#include <linux/vmalloc.h>
6aa8b732 31#include <linux/reboot.h>
6aa8b732
AK		 32#include <linux/debugfs.h>
33#include <linux/highmem.h>
34#include <linux/file.h>
59ae6c6b 35#include <linux/sysdev.h>
774c47f1 36#include <linux/cpu.h>
e8edc6e0 37#include <linux/sched.h>
d9e368d6
AK		 38#include <linux/cpumask.h>
39#include <linux/smp.h>
d6d28168 40#include <linux/anon_inodes.h>
04d2cc77 41#include <linux/profile.h>
7aa81cc0 42#include <linux/kvm_para.h>
6aa8b732 43
e495606d
AK		 44#include <asm/processor.h>
45#include <asm/msr.h>
46#include <asm/io.h>
47#include <asm/uaccess.h>
48#include <asm/desc.h>
6aa8b732
AK		 49
50MODULE_AUTHOR("Qumranet");
51MODULE_LICENSE("GPL");
52
133de902
AK		 53static DEFINE_SPINLOCK(kvm_lock);
54static LIST_HEAD(vm_list);
55
1b6c0168
AK		 56static cpumask_t cpus_hardware_enabled;
57
cbdd1bea 58struct kvm_x86_ops *kvm_x86_ops;
c16f862d
RR		 59struct kmem_cache *kvm_vcpu_cache;
60EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 61
15ad7146
AK		 62static __read_mostly struct preempt_ops kvm_preempt_ops;
63
1165f5fe 64#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
6aa8b732
AK		 65
66static struct kvm_stats_debugfs_item {
67 const char *name;
1165f5fe 68 int offset;
6aa8b732
AK		 69 struct dentry *dentry;
70} debugfs_entries[] = {
1165f5fe
AK		 71 { "pf_fixed", STAT_OFFSET(pf_fixed) },
72 { "pf_guest", STAT_OFFSET(pf_guest) },
73 { "tlb_flush", STAT_OFFSET(tlb_flush) },
74 { "invlpg", STAT_OFFSET(invlpg) },
75 { "exits", STAT_OFFSET(exits) },
76 { "io_exits", STAT_OFFSET(io_exits) },
77 { "mmio_exits", STAT_OFFSET(mmio_exits) },
78 { "signal_exits", STAT_OFFSET(signal_exits) },
79 { "irq_window", STAT_OFFSET(irq_window_exits) },
80 { "halt_exits", STAT_OFFSET(halt_exits) },
b6958ce4 81 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
1165f5fe
AK		 82 { "request_irq", STAT_OFFSET(request_irq_exits) },
83 { "irq_exits", STAT_OFFSET(irq_exits) },
e6adf283 84 { "light_exits", STAT_OFFSET(light_exits) },
2cc51560 85 { "efer_reload", STAT_OFFSET(efer_reload) },
1165f5fe 86 { NULL }
6aa8b732
AK		 87};
88
89static struct dentry *debugfs_dir;
90
91#define MAX_IO_MSRS 256
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
6aa8b732
AK		 107// LDT or TSS descriptor in the GDT. 16 bytes.
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;
124 typedef unsigned long ul;
125 unsigned long v;
126
127 if (selector == 0)
128 return 0;
129
130 asm ("sgdt %0" : "=m"(gdt));
131 table_base = gdt.base;
132
133 if (selector & 4) { /* from ldt */
134 u16 ldt_selector;
135
136 asm ("sldt %0" : "=g"(ldt_selector));
137 table_base = segment_base(ldt_selector);
138 }
139 d = (struct segment_descriptor *)(table_base + (selector & ~7));
140 v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
05b3e0c2 141#ifdef CONFIG_X86_64
6aa8b732
AK		 142 if (d->system == 0
143 && (d->type == 2 || d->type == 9 || d->type == 11))
144 v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32;
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 */
180static void 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);
cbdd1bea 187 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146 188 put_cpu();
6aa8b732
AK		 189}
190
6aa8b732
AK		 191static void vcpu_put(struct kvm_vcpu *vcpu)
192{
15ad7146 193 preempt_disable();
cbdd1bea 194 kvm_x86_ops->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;
d9e368d6
AK		 215 if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests))
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
258 return 0;
259
260fail_free_pio_data:
261 free_page((unsigned long)vcpu->pio_data);
262fail_free_run:
263 free_page((unsigned long)vcpu->run);
264fail:
265 return -ENOMEM;
266}
267EXPORT_SYMBOL_GPL(kvm_vcpu_init);
268
269void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
270{
271 kvm_mmu_destroy(vcpu);
1b9778da
ED		 272 if (vcpu->apic)
273 hrtimer_cancel(&vcpu->apic->timer.dev);
97222cc8 274 kvm_free_apic(vcpu->apic);
fb3f0f51
RR		 275 free_page((unsigned long)vcpu->pio_data);
276 free_page((unsigned long)vcpu->run);
277}
278EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
279
f17abe9a 280static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 281{
282 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
6aa8b732
AK		 283
284 if (!kvm)
f17abe9a 285 return ERR_PTR(-ENOMEM);
6aa8b732 286
74906345 287 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 288 mutex_init(&kvm->lock);
6aa8b732 289 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2eeb2e94 290 kvm_io_bus_init(&kvm->mmio_bus);
5e58cfe4
RR		 291 spin_lock(&kvm_lock);
292 list_add(&kvm->vm_list, &vm_list);
293 spin_unlock(&kvm_lock);
f17abe9a
AK		 294 return kvm;
295}
296
6aa8b732
AK		 297/*
298 * Free any memory in @free but not in @dont.
299 */
300static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
301 struct kvm_memory_slot *dont)
302{
303 int i;
304
305 if (!dont || free->phys_mem != dont->phys_mem)
306 if (free->phys_mem) {
307 for (i = 0; i < free->npages; ++i)
55a54f79
AK		 308 if (free->phys_mem[i])
309 __free_page(free->phys_mem[i]);
6aa8b732
AK		 310 vfree(free->phys_mem);
311 }
290fc38d
IE		 312 if (!dont || free->rmap != dont->rmap)
313 vfree(free->rmap);
6aa8b732
AK		 314
315 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
316 vfree(free->dirty_bitmap);
317
8b6d44c7 318 free->phys_mem = NULL;
6aa8b732 319 free->npages = 0;
8b6d44c7 320 free->dirty_bitmap = NULL;
6aa8b732
AK		 321}
322
323static void kvm_free_physmem(struct kvm *kvm)
324{
325 int i;
326
327 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 328 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 329}
330
039576c0
AK		 331static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
332{
333 int i;
334
3077c451 335 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
039576c0
AK		 336 if (vcpu->pio.guest_pages[i]) {
337 __free_page(vcpu->pio.guest_pages[i]);
338 vcpu->pio.guest_pages[i] = NULL;
339 }
340}
341
7b53aa56
AK		 342static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
343{
7b53aa56
AK		 344 vcpu_load(vcpu);
345 kvm_mmu_unload(vcpu);
346 vcpu_put(vcpu);
347}
348
6aa8b732
AK		 349static void kvm_free_vcpus(struct kvm *kvm)
350{
351 unsigned int i;
352
7b53aa56
AK		 353 /*
354 * Unpin any mmu pages first.
355 */
356 for (i = 0; i < KVM_MAX_VCPUS; ++i)
fb3f0f51
RR		 357 if (kvm->vcpus[i])
358 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
359 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
360 if (kvm->vcpus[i]) {
cbdd1bea 361 kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
fb3f0f51
RR		 362 kvm->vcpus[i] = NULL;
363 }
364 }
365
6aa8b732
AK		 366}
367
f17abe9a
AK		 368static void kvm_destroy_vm(struct kvm *kvm)
369{
133de902
AK		 370 spin_lock(&kvm_lock);
371 list_del(&kvm->vm_list);
372 spin_unlock(&kvm_lock);
74906345 373 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 374 kvm_io_bus_destroy(&kvm->mmio_bus);
85f455f7 375 kfree(kvm->vpic);
1fd4f2a5 376 kfree(kvm->vioapic);
6aa8b732
AK		 377 kvm_free_vcpus(kvm);
378 kvm_free_physmem(kvm);
379 kfree(kvm);
f17abe9a
AK		 380}
381
382static int kvm_vm_release(struct inode *inode, struct file *filp)
383{
384 struct kvm *kvm = filp->private_data;
385
386 kvm_destroy_vm(kvm);
6aa8b732
AK		 387 return 0;
388}
389
390static void inject_gp(struct kvm_vcpu *vcpu)
391{
cbdd1bea 392 kvm_x86_ops->inject_gp(vcpu, 0);
6aa8b732
AK		 393}
394
1342d353
AK		 395/*
396 * Load the pae pdptrs. Return true is they are all valid.
397 */
398static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 399{
400 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 401 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732 402 int i;
6aa8b732 403 u64 *pdpt;
1342d353 404 int ret;
954bbbc2 405 struct page *page;
c820c2aa 406 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
6aa8b732 407
11ec2804 408 mutex_lock(&vcpu->kvm->lock);
954bbbc2 409 page = gfn_to_page(vcpu->kvm, pdpt_gfn);
c820c2aa
RR		 410 if (!page) {
411 ret = 0;
412 goto out;
413 }
414
954bbbc2 415 pdpt = kmap_atomic(page, KM_USER0);
c820c2aa
RR		 416 memcpy(pdpte, pdpt+offset, sizeof(pdpte));
417 kunmap_atomic(pdpt, KM_USER0);
6aa8b732 418
c820c2aa
RR		 419 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
420 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
1342d353
AK		 421 ret = 0;
422 goto out;
423 }
6aa8b732 424 }
c820c2aa 425 ret = 1;
6aa8b732 426
c820c2aa 427 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
1342d353 428out:
11ec2804 429 mutex_unlock(&vcpu->kvm->lock);
6aa8b732 430
1342d353 431 return ret;
6aa8b732
AK		 432}
433
434void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
435{
707d92fa 436 if (cr0 & CR0_RESERVED_BITS) {
6aa8b732
AK		 437 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
438 cr0, vcpu->cr0);
439 inject_gp(vcpu);
440 return;
441 }
442
707d92fa 443 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
6aa8b732
AK		 444 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
445 inject_gp(vcpu);
446 return;
447 }
448
707d92fa 449 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
6aa8b732
AK		 450 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
451 "and a clear PE flag\n");
452 inject_gp(vcpu);
453 return;
454 }
455
707d92fa 456 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
05b3e0c2 457#ifdef CONFIG_X86_64
6aa8b732
AK		 458 if ((vcpu->shadow_efer & EFER_LME)) {
459 int cs_db, cs_l;
460
461 if (!is_pae(vcpu)) {
462 printk(KERN_DEBUG "set_cr0: #GP, start paging "
463 "in long mode while PAE is disabled\n");
464 inject_gp(vcpu);
465 return;
466 }
cbdd1bea 467 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
6aa8b732
AK		 468 if (cs_l) {
469 printk(KERN_DEBUG "set_cr0: #GP, start paging "
470 "in long mode while CS.L == 1\n");
471 inject_gp(vcpu);
472 return;
473
474 }
475 } else
476#endif
1342d353 477 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 478 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
479 "reserved bits\n");
480 inject_gp(vcpu);
481 return;
482 }
483
484 }
485
cbdd1bea 486 kvm_x86_ops->set_cr0(vcpu, cr0);
6aa8b732
AK		 487 vcpu->cr0 = cr0;
488
11ec2804 489 mutex_lock(&vcpu->kvm->lock);
6aa8b732 490 kvm_mmu_reset_context(vcpu);
11ec2804 491 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 492 return;
493}
494EXPORT_SYMBOL_GPL(set_cr0);
495
496void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
497{
498 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
499}
500EXPORT_SYMBOL_GPL(lmsw);
501
502void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
503{
66aee91a 504 if (cr4 & CR4_RESERVED_BITS) {
6aa8b732
AK		 505 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
506 inject_gp(vcpu);
507 return;
508 }
509
a9058ecd 510 if (is_long_mode(vcpu)) {
66aee91a 511 if (!(cr4 & X86_CR4_PAE)) {
6aa8b732
AK		 512 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
513 "in long mode\n");
514 inject_gp(vcpu);
515 return;
516 }
66aee91a 517 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
1342d353 518 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 519 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
520 inject_gp(vcpu);
310bc76c 521 return;
6aa8b732
AK		 522 }
523
66aee91a 524 if (cr4 & X86_CR4_VMXE) {
6aa8b732
AK		 525 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
526 inject_gp(vcpu);
527 return;
528 }
cbdd1bea 529 kvm_x86_ops->set_cr4(vcpu, cr4);
81f50e3b 530 vcpu->cr4 = cr4;
11ec2804 531 mutex_lock(&vcpu->kvm->lock);
6aa8b732 532 kvm_mmu_reset_context(vcpu);
11ec2804 533 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 534}
535EXPORT_SYMBOL_GPL(set_cr4);
536
537void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
538{
a9058ecd 539 if (is_long_mode(vcpu)) {
f802a307 540 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
6aa8b732
AK		 541 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
542 inject_gp(vcpu);
543 return;
544 }
545 } else {
f802a307
RR		 546 if (is_pae(vcpu)) {
547 if (cr3 & CR3_PAE_RESERVED_BITS) {
548 printk(KERN_DEBUG
549 "set_cr3: #GP, reserved bits\n");
550 inject_gp(vcpu);
551 return;
552 }
553 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
554 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
555 "reserved bits\n");
556 inject_gp(vcpu);
557 return;
558 }
6aa8b732 559 }
21764863
RH		 560 /*
561 * We don't check reserved bits in nonpae mode, because
562 * this isn't enforced, and VMware depends on this.
563 */
6aa8b732
AK		 564 }
565
11ec2804 566 mutex_lock(&vcpu->kvm->lock);
d21225ee
IM		 567 /*
568 * Does the new cr3 value map to physical memory? (Note, we
569 * catch an invalid cr3 even in real-mode, because it would
570 * cause trouble later on when we turn on paging anyway.)
571 *
572 * A real CPU would silently accept an invalid cr3 and would
573 * attempt to use it - with largely undefined (and often hard
574 * to debug) behavior on the guest side.
575 */
576 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
577 inject_gp(vcpu);
fb764416
RR		 578 else {
579 vcpu->cr3 = cr3;
d21225ee 580 vcpu->mmu.new_cr3(vcpu);
fb764416 581 }
11ec2804 582 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 583}
584EXPORT_SYMBOL_GPL(set_cr3);
585
586void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
587{
7075bc81 588 if (cr8 & CR8_RESERVED_BITS) {
6aa8b732
AK		 589 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
590 inject_gp(vcpu);
591 return;
592 }
97222cc8
ED		 593 if (irqchip_in_kernel(vcpu->kvm))
594 kvm_lapic_set_tpr(vcpu, cr8);
595 else
596 vcpu->cr8 = cr8;
6aa8b732
AK		 597}
598EXPORT_SYMBOL_GPL(set_cr8);
599
7017fc3d
ED		 600unsigned long get_cr8(struct kvm_vcpu *vcpu)
601{
97222cc8
ED		 602 if (irqchip_in_kernel(vcpu->kvm))
603 return kvm_lapic_get_cr8(vcpu);
604 else
605 return vcpu->cr8;
7017fc3d
ED		 606}
607EXPORT_SYMBOL_GPL(get_cr8);
608
609u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
610{
97222cc8
ED		 611 if (irqchip_in_kernel(vcpu->kvm))
612 return vcpu->apic_base;
613 else
614 return vcpu->apic_base;
7017fc3d
ED		 615}
616EXPORT_SYMBOL_GPL(kvm_get_apic_base);
617
618void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
619{
97222cc8
ED		 620 /* TODO: reserve bits check */
621 if (irqchip_in_kernel(vcpu->kvm))
622 kvm_lapic_set_base(vcpu, data);
623 else
624 vcpu->apic_base = data;
7017fc3d
ED		 625}
626EXPORT_SYMBOL_GPL(kvm_set_apic_base);
627
6aa8b732
AK		 628void fx_init(struct kvm_vcpu *vcpu)
629{
b114b080 630 unsigned after_mxcsr_mask;
6aa8b732 631
9bd01506
RR		 632 /* Initialize guest FPU by resetting ours and saving into guest's */
633 preempt_disable();
b114b080 634 fx_save(&vcpu->host_fx_image);
6aa8b732 635 fpu_init();
b114b080
RR		 636 fx_save(&vcpu->guest_fx_image);
637 fx_restore(&vcpu->host_fx_image);
9bd01506 638 preempt_enable();
6aa8b732 639
380102c8 640 vcpu->cr0 |= X86_CR0_ET;
b114b080
RR		 641 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
642 vcpu->guest_fx_image.mxcsr = 0x1f80;
643 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
644 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
6aa8b732
AK		 645}
646EXPORT_SYMBOL_GPL(fx_init);
647
6aa8b732
AK		 648/*
649 * Allocate some memory and give it an address in the guest physical address
650 * space.
651 *
652 * Discontiguous memory is allowed, mostly for framebuffers.
653 */
2c6f5df9
AK		 654static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
655 struct kvm_memory_region *mem)
6aa8b732
AK		 656{
657 int r;
658 gfn_t base_gfn;
659 unsigned long npages;
660 unsigned long i;
661 struct kvm_memory_slot *memslot;
662 struct kvm_memory_slot old, new;
6aa8b732
AK		 663
664 r = -EINVAL;
665 /* General sanity checks */
666 if (mem->memory_size & (PAGE_SIZE - 1))
667 goto out;
668 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
669 goto out;
670 if (mem->slot >= KVM_MEMORY_SLOTS)
671 goto out;
672 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
673 goto out;
674
675 memslot = &kvm->memslots[mem->slot];
676 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
677 npages = mem->memory_size >> PAGE_SHIFT;
678
679 if (!npages)
680 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
681
11ec2804 682 mutex_lock(&kvm->lock);
6aa8b732 683
6aa8b732
AK		 684 new = old = *memslot;
685
686 new.base_gfn = base_gfn;
687 new.npages = npages;
688 new.flags = mem->flags;
689
690 /* Disallow changing a memory slot's size. */
691 r = -EINVAL;
692 if (npages && old.npages && npages != old.npages)
693 goto out_unlock;
694
695 /* Check for overlaps */
696 r = -EEXIST;
697 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
698 struct kvm_memory_slot *s = &kvm->memslots[i];
699
700 if (s == memslot)
701 continue;
702 if (!((base_gfn + npages <= s->base_gfn) ||
703 (base_gfn >= s->base_gfn + s->npages)))
704 goto out_unlock;
705 }
6aa8b732
AK		 706
707 /* Deallocate if slot is being removed */
708 if (!npages)
8b6d44c7 709 new.phys_mem = NULL;
6aa8b732
AK		 710
711 /* Free page dirty bitmap if unneeded */
712 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 713 new.dirty_bitmap = NULL;
6aa8b732
AK		 714
715 r = -ENOMEM;
716
717 /* Allocate if a slot is being created */
718 if (npages && !new.phys_mem) {
719 new.phys_mem = vmalloc(npages * sizeof(struct page *));
720
721 if (!new.phys_mem)
0d8d2bd4 722 goto out_unlock;
6aa8b732 723
290fc38d
IE		 724 new.rmap = vmalloc(npages * sizeof(struct page*));
725
726 if (!new.rmap)
727 goto out_unlock;
728
6aa8b732 729 memset(new.phys_mem, 0, npages * sizeof(struct page *));
290fc38d 730 memset(new.rmap, 0, npages * sizeof(*new.rmap));
6aa8b732
AK		 731 for (i = 0; i < npages; ++i) {
732 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
733 | __GFP_ZERO);
734 if (!new.phys_mem[i])
0d8d2bd4 735 goto out_unlock;
6aa8b732
AK		 736 }
737 }
738
739 /* Allocate page dirty bitmap if needed */
740 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
741 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
742
743 new.dirty_bitmap = vmalloc(dirty_bytes);
744 if (!new.dirty_bitmap)
0d8d2bd4 745 goto out_unlock;
6aa8b732
AK		 746 memset(new.dirty_bitmap, 0, dirty_bytes);
747 }
748
6aa8b732
AK		 749 if (mem->slot >= kvm->nmemslots)
750 kvm->nmemslots = mem->slot + 1;
751
752 *memslot = new;
6aa8b732 753
90cb0529
AK		 754 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
755 kvm_flush_remote_tlbs(kvm);
6aa8b732 756
11ec2804 757 mutex_unlock(&kvm->lock);
6aa8b732
AK		 758
759 kvm_free_physmem_slot(&old, &new);
760 return 0;
761
762out_unlock:
11ec2804 763 mutex_unlock(&kvm->lock);
6aa8b732
AK		 764 kvm_free_physmem_slot(&new, &old);
765out:
766 return r;
767}
768
769/*
770 * Get (and clear) the dirty memory log for a memory slot.
771 */
2c6f5df9
AK		 772static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
773 struct kvm_dirty_log *log)
6aa8b732
AK		 774{
775 struct kvm_memory_slot *memslot;
776 int r, i;
777 int n;
778 unsigned long any = 0;
779
11ec2804 780 mutex_lock(&kvm->lock);
6aa8b732 781
6aa8b732
AK		 782 r = -EINVAL;
783 if (log->slot >= KVM_MEMORY_SLOTS)
784 goto out;
785
786 memslot = &kvm->memslots[log->slot];
787 r = -ENOENT;
788 if (!memslot->dirty_bitmap)
789 goto out;
790
cd1a4a98 791 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 792
cd1a4a98 793 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 794 any = memslot->dirty_bitmap[i];
795
796 r = -EFAULT;
797 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
798 goto out;
799
39214915
RR		 800 /* If nothing is dirty, don't bother messing with page tables. */
801 if (any) {
39214915
RR		 802 kvm_mmu_slot_remove_write_access(kvm, log->slot);
803 kvm_flush_remote_tlbs(kvm);
804 memset(memslot->dirty_bitmap, 0, n);
39214915 805 }
6aa8b732
AK		 806
807 r = 0;
808
809out:
11ec2804 810 mutex_unlock(&kvm->lock);
6aa8b732
AK		 811 return r;
812}
813
e8207547
AK		 814/*
815 * Set a new alias region. Aliases map a portion of physical memory into
816 * another portion. This is useful for memory windows, for example the PC
817 * VGA region.
818 */
819static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
820 struct kvm_memory_alias *alias)
821{
822 int r, n;
823 struct kvm_mem_alias *p;
824
825 r = -EINVAL;
826 /* General sanity checks */
827 if (alias->memory_size & (PAGE_SIZE - 1))
828 goto out;
829 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
830 goto out;
831 if (alias->slot >= KVM_ALIAS_SLOTS)
832 goto out;
833 if (alias->guest_phys_addr + alias->memory_size
834 < alias->guest_phys_addr)
835 goto out;
836 if (alias->target_phys_addr + alias->memory_size
837 < alias->target_phys_addr)
838 goto out;
839
11ec2804 840 mutex_lock(&kvm->lock);
e8207547
AK		 841
842 p = &kvm->aliases[alias->slot];
843 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
844 p->npages = alias->memory_size >> PAGE_SHIFT;
845 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
846
847 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
848 if (kvm->aliases[n - 1].npages)
849 break;
850 kvm->naliases = n;
851
90cb0529 852 kvm_mmu_zap_all(kvm);
e8207547 853
11ec2804 854 mutex_unlock(&kvm->lock);
e8207547
AK		 855
856 return 0;
857
858out:
859 return r;
860}
861
6ceb9d79
HQ		 862static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
863{
864 int r;
865
866 r = 0;
867 switch (chip->chip_id) {
868 case KVM_IRQCHIP_PIC_MASTER:
869 memcpy (&chip->chip.pic,
870 &pic_irqchip(kvm)->pics[0],
871 sizeof(struct kvm_pic_state));
872 break;
873 case KVM_IRQCHIP_PIC_SLAVE:
874 memcpy (&chip->chip.pic,
875 &pic_irqchip(kvm)->pics[1],
876 sizeof(struct kvm_pic_state));
877 break;
6bf9e962
HQ		 878 case KVM_IRQCHIP_IOAPIC:
879 memcpy (&chip->chip.ioapic,
880 ioapic_irqchip(kvm),
881 sizeof(struct kvm_ioapic_state));
882 break;
6ceb9d79
HQ		 883 default:
884 r = -EINVAL;
885 break;
886 }
887 return r;
888}
889
890static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
891{
892 int r;
893
894 r = 0;
895 switch (chip->chip_id) {
896 case KVM_IRQCHIP_PIC_MASTER:
897 memcpy (&pic_irqchip(kvm)->pics[0],
898 &chip->chip.pic,
899 sizeof(struct kvm_pic_state));
900 break;
901 case KVM_IRQCHIP_PIC_SLAVE:
902 memcpy (&pic_irqchip(kvm)->pics[1],
903 &chip->chip.pic,
904 sizeof(struct kvm_pic_state));
905 break;
6bf9e962
HQ		 906 case KVM_IRQCHIP_IOAPIC:
907 memcpy (ioapic_irqchip(kvm),
908 &chip->chip.ioapic,
909 sizeof(struct kvm_ioapic_state));
910 break;
6ceb9d79
HQ		 911 default:
912 r = -EINVAL;
913 break;
914 }
915 kvm_pic_update_irq(pic_irqchip(kvm));
916 return r;
917}
918
290fc38d 919gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
e8207547
AK		 920{
921 int i;
922 struct kvm_mem_alias *alias;
923
924 for (i = 0; i < kvm->naliases; ++i) {
925 alias = &kvm->aliases[i];
926 if (gfn >= alias->base_gfn
927 && gfn < alias->base_gfn + alias->npages)
928 return alias->target_gfn + gfn - alias->base_gfn;
929 }
930 return gfn;
931}
932
933static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 934{
935 int i;
936
937 for (i = 0; i < kvm->nmemslots; ++i) {
938 struct kvm_memory_slot *memslot = &kvm->memslots[i];
939
940 if (gfn >= memslot->base_gfn
941 && gfn < memslot->base_gfn + memslot->npages)
942 return memslot;
943 }
8b6d44c7 944 return NULL;
6aa8b732 945}
e8207547
AK		 946
947struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
948{
949 gfn = unalias_gfn(kvm, gfn);
950 return __gfn_to_memslot(kvm, gfn);
951}
6aa8b732 952
954bbbc2
AK		 953struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
954{
955 struct kvm_memory_slot *slot;
956
e8207547
AK		 957 gfn = unalias_gfn(kvm, gfn);
958 slot = __gfn_to_memslot(kvm, gfn);
954bbbc2
AK		 959 if (!slot)
960 return NULL;
961 return slot->phys_mem[gfn - slot->base_gfn];
962}
963EXPORT_SYMBOL_GPL(gfn_to_page);
964
7e9d619d 965/* WARNING: Does not work on aliased pages. */
6aa8b732
AK		 966void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
967{
31389947 968 struct kvm_memory_slot *memslot;
6aa8b732 969
7e9d619d
RR		 970 memslot = __gfn_to_memslot(kvm, gfn);
971 if (memslot && memslot->dirty_bitmap) {
972 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 973
7e9d619d
RR		 974 /* avoid RMW */
975 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
976 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 977 }
978}
979
e7d5d76c 980int emulator_read_std(unsigned long addr,
4c690a1e 981 void *val,
6aa8b732 982 unsigned int bytes,
cebff02b 983 struct kvm_vcpu *vcpu)
6aa8b732 984{
6aa8b732
AK		 985 void *data = val;
986
987 while (bytes) {
988 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
989 unsigned offset = addr & (PAGE_SIZE-1);
990 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
991 unsigned long pfn;
954bbbc2
AK		 992 struct page *page;
993 void *page_virt;
6aa8b732
AK		 994
995 if (gpa == UNMAPPED_GVA)
996 return X86EMUL_PROPAGATE_FAULT;
997 pfn = gpa >> PAGE_SHIFT;
954bbbc2
AK		 998 page = gfn_to_page(vcpu->kvm, pfn);
999 if (!page)
6aa8b732 1000 return X86EMUL_UNHANDLEABLE;
954bbbc2 1001 page_virt = kmap_atomic(page, KM_USER0);
6aa8b732 1002
954bbbc2 1003 memcpy(data, page_virt + offset, tocopy);
6aa8b732 1004
954bbbc2 1005 kunmap_atomic(page_virt, KM_USER0);
6aa8b732
AK		 1006
1007 bytes -= tocopy;
1008 data += tocopy;
1009 addr += tocopy;
1010 }
1011
1012 return X86EMUL_CONTINUE;
1013}
e7d5d76c 1014EXPORT_SYMBOL_GPL(emulator_read_std);
6aa8b732
AK		 1015
1016static int emulator_write_std(unsigned long addr,
4c690a1e 1017 const void *val,
6aa8b732 1018 unsigned int bytes,
cebff02b 1019 struct kvm_vcpu *vcpu)
6aa8b732 1020{
f0242478 1021 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
6aa8b732
AK		 1022 return X86EMUL_UNHANDLEABLE;
1023}
1024
97222cc8
ED		 1025/*
1026 * Only apic need an MMIO device hook, so shortcut now..
1027 */
1028static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1029 gpa_t addr)
1030{
1031 struct kvm_io_device *dev;
1032
1033 if (vcpu->apic) {
1034 dev = &vcpu->apic->dev;
1035 if (dev->in_range(dev, addr))
1036 return dev;
1037 }
1038 return NULL;
1039}
1040
2eeb2e94
GH		 1041static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1042 gpa_t addr)
1043{
97222cc8
ED		 1044 struct kvm_io_device *dev;
1045
1046 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1047 if (dev == NULL)
1048 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1049 return dev;
2eeb2e94
GH		 1050}
1051
74906345
ED		 1052static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1053 gpa_t addr)
1054{
1055 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1056}
1057
6aa8b732 1058static int emulator_read_emulated(unsigned long addr,
4c690a1e 1059 void *val,
6aa8b732 1060 unsigned int bytes,
cebff02b 1061 struct kvm_vcpu *vcpu)
6aa8b732 1062{
2eeb2e94
GH		 1063 struct kvm_io_device *mmio_dev;
1064 gpa_t gpa;
6aa8b732
AK		 1065
1066 if (vcpu->mmio_read_completed) {
1067 memcpy(val, vcpu->mmio_data, bytes);
1068 vcpu->mmio_read_completed = 0;
1069 return X86EMUL_CONTINUE;
cebff02b 1070 } else if (emulator_read_std(addr, val, bytes, vcpu)
6aa8b732
AK		 1071 == X86EMUL_CONTINUE)
1072 return X86EMUL_CONTINUE;
d27d4aca 1073
2eeb2e94
GH		 1074 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1075 if (gpa == UNMAPPED_GVA)
1076 return X86EMUL_PROPAGATE_FAULT;
6aa8b732 1077
2eeb2e94
GH		 1078 /*
1079 * Is this MMIO handled locally?
1080 */
1081 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1082 if (mmio_dev) {
1083 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1084 return X86EMUL_CONTINUE;
6aa8b732 1085 }
2eeb2e94
GH		 1086
1087 vcpu->mmio_needed = 1;
1088 vcpu->mmio_phys_addr = gpa;
1089 vcpu->mmio_size = bytes;
1090 vcpu->mmio_is_write = 0;
1091
1092 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1093}
1094
da4a00f0 1095static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
4c690a1e 1096 const void *val, int bytes)
da4a00f0 1097{
da4a00f0
AK		 1098 struct page *page;
1099 void *virt;
1100
1101 if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
1102 return 0;
954bbbc2
AK		 1103 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1104 if (!page)
da4a00f0 1105 return 0;
ab51a434 1106 mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
da4a00f0 1107 virt = kmap_atomic(page, KM_USER0);
fe551881 1108 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
7cfa4b0a 1109 memcpy(virt + offset_in_page(gpa), val, bytes);
da4a00f0 1110 kunmap_atomic(virt, KM_USER0);
da4a00f0
AK		 1111 return 1;
1112}
1113
b0fcd903
AK		 1114static int emulator_write_emulated_onepage(unsigned long addr,
1115 const void *val,
1116 unsigned int bytes,
cebff02b 1117 struct kvm_vcpu *vcpu)
6aa8b732 1118{
2eeb2e94
GH		 1119 struct kvm_io_device *mmio_dev;
1120 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
6aa8b732 1121
c9047f53 1122 if (gpa == UNMAPPED_GVA) {
cbdd1bea 1123 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
6aa8b732 1124 return X86EMUL_PROPAGATE_FAULT;
c9047f53 1125 }
6aa8b732 1126
da4a00f0
AK		 1127 if (emulator_write_phys(vcpu, gpa, val, bytes))
1128 return X86EMUL_CONTINUE;
1129
2eeb2e94
GH		 1130 /*
1131 * Is this MMIO handled locally?
1132 */
1133 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1134 if (mmio_dev) {
1135 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1136 return X86EMUL_CONTINUE;
1137 }
1138
6aa8b732
AK		 1139 vcpu->mmio_needed = 1;
1140 vcpu->mmio_phys_addr = gpa;
1141 vcpu->mmio_size = bytes;
1142 vcpu->mmio_is_write = 1;
4c690a1e 1143 memcpy(vcpu->mmio_data, val, bytes);
6aa8b732
AK		 1144
1145 return X86EMUL_CONTINUE;
1146}
1147
e7d5d76c 1148int emulator_write_emulated(unsigned long addr,
b0fcd903
AK		 1149 const void *val,
1150 unsigned int bytes,
cebff02b 1151 struct kvm_vcpu *vcpu)
b0fcd903
AK		 1152{
1153 /* Crossing a page boundary? */
1154 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1155 int rc, now;
1156
1157 now = -addr & ~PAGE_MASK;
cebff02b 1158 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
b0fcd903
AK		 1159 if (rc != X86EMUL_CONTINUE)
1160 return rc;
1161 addr += now;
1162 val += now;
1163 bytes -= now;
1164 }
cebff02b 1165 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
b0fcd903 1166}
e7d5d76c 1167EXPORT_SYMBOL_GPL(emulator_write_emulated);
b0fcd903 1168
6aa8b732 1169static int emulator_cmpxchg_emulated(unsigned long addr,
4c690a1e
AK		 1170 const void *old,
1171 const void *new,
6aa8b732 1172 unsigned int bytes,
cebff02b 1173 struct kvm_vcpu *vcpu)
6aa8b732
AK		 1174{
1175 static int reported;
1176
1177 if (!reported) {
1178 reported = 1;
1179 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1180 }
cebff02b 1181 return emulator_write_emulated(addr, new, bytes, vcpu);
6aa8b732
AK		 1182}
1183
1184static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1185{
cbdd1bea 1186 return kvm_x86_ops->get_segment_base(vcpu, seg);
6aa8b732
AK		 1187}
1188
1189int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1190{
6aa8b732
AK		 1191 return X86EMUL_CONTINUE;
1192}
1193
1194int emulate_clts(struct kvm_vcpu *vcpu)
1195{
404fb881 1196 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
6aa8b732
AK		 1197 return X86EMUL_CONTINUE;
1198}
1199
1200int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
1201{
1202 struct kvm_vcpu *vcpu = ctxt->vcpu;
1203
1204 switch (dr) {
1205 case 0 ... 3:
cbdd1bea 1206 *dest = kvm_x86_ops->get_dr(vcpu, dr);
6aa8b732
AK		 1207 return X86EMUL_CONTINUE;
1208 default:
f0242478 1209 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
6aa8b732
AK		 1210 return X86EMUL_UNHANDLEABLE;
1211 }
1212}
1213
1214int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1215{
1216 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1217 int exception;
1218
cbdd1bea 1219 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
6aa8b732
AK		 1220 if (exception) {
1221 /* FIXME: better handling */
1222 return X86EMUL_UNHANDLEABLE;
1223 }
1224 return X86EMUL_CONTINUE;
1225}
1226
054b1369 1227void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
6aa8b732
AK		 1228{
1229 static int reported;
1230 u8 opcodes[4];
054b1369 1231 unsigned long rip = vcpu->rip;
6aa8b732
AK		 1232 unsigned long rip_linear;
1233
054b1369 1234 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
6aa8b732
AK		 1235
1236 if (reported)
1237 return;
1238
054b1369 1239 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
6aa8b732 1240
054b1369
AK		 1241 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1242 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
6aa8b732
AK		 1243 reported = 1;
1244}
054b1369 1245EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
6aa8b732
AK		 1246
1247struct x86_emulate_ops emulate_ops = {
1248 .read_std = emulator_read_std,
1249 .write_std = emulator_write_std,
1250 .read_emulated = emulator_read_emulated,
1251 .write_emulated = emulator_write_emulated,
1252 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1253};
1254
1255int emulate_instruction(struct kvm_vcpu *vcpu,
1256 struct kvm_run *run,
1257 unsigned long cr2,
3427318f
LV		 1258 u16 error_code,
1259 int no_decode)
6aa8b732 1260{
a22436b7 1261 int r;
6aa8b732 1262
e7df56e4 1263 vcpu->mmio_fault_cr2 = cr2;
cbdd1bea 1264 kvm_x86_ops->cache_regs(vcpu);
6aa8b732 1265
6aa8b732 1266 vcpu->mmio_is_write = 0;
e70669ab 1267 vcpu->pio.string = 0;
3427318f
LV		 1268
1269 if (!no_decode) {
1270 int cs_db, cs_l;
1271 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1272
1273 vcpu->emulate_ctxt.vcpu = vcpu;
1274 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1275 vcpu->emulate_ctxt.cr2 = cr2;
1276 vcpu->emulate_ctxt.mode =
1277 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1278 ? X86EMUL_MODE_REAL : cs_l
1279 ? X86EMUL_MODE_PROT64 : cs_db
1280 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1281
1282 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1283 vcpu->emulate_ctxt.cs_base = 0;
1284 vcpu->emulate_ctxt.ds_base = 0;
1285 vcpu->emulate_ctxt.es_base = 0;
1286 vcpu->emulate_ctxt.ss_base = 0;
1287 } else {
1288 vcpu->emulate_ctxt.cs_base =
1289 get_segment_base(vcpu, VCPU_SREG_CS);
1290 vcpu->emulate_ctxt.ds_base =
1291 get_segment_base(vcpu, VCPU_SREG_DS);
1292 vcpu->emulate_ctxt.es_base =
1293 get_segment_base(vcpu, VCPU_SREG_ES);
1294 vcpu->emulate_ctxt.ss_base =
1295 get_segment_base(vcpu, VCPU_SREG_SS);
1296 }
1297
1298 vcpu->emulate_ctxt.gs_base =
1299 get_segment_base(vcpu, VCPU_SREG_GS);
1300 vcpu->emulate_ctxt.fs_base =
1301 get_segment_base(vcpu, VCPU_SREG_FS);
1302
1303 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
a22436b7
LV		 1304 if (r) {
1305 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1306 return EMULATE_DONE;
1307 return EMULATE_FAIL;
1308 }
3427318f
LV		 1309 }
1310
a22436b7 1311 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1be3aa47 1312
e70669ab
LV		 1313 if (vcpu->pio.string)
1314 return EMULATE_DO_MMIO;
6aa8b732
AK		 1315
1316 if ((r || vcpu->mmio_is_write) && run) {
8fc0d085 1317 run->exit_reason = KVM_EXIT_MMIO;
6aa8b732
AK		 1318 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1319 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1320 run->mmio.len = vcpu->mmio_size;
1321 run->mmio.is_write = vcpu->mmio_is_write;
1322 }
1323
1324 if (r) {
a436036b
AK		 1325 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1326 return EMULATE_DONE;
6aa8b732 1327 if (!vcpu->mmio_needed) {
054b1369 1328 kvm_report_emulation_failure(vcpu, "mmio");
6aa8b732
AK		 1329 return EMULATE_FAIL;
1330 }
1331 return EMULATE_DO_MMIO;
1332 }
1333
cbdd1bea 1334 kvm_x86_ops->decache_regs(vcpu);
3427318f 1335 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
6aa8b732 1336
02c83209
AK		 1337 if (vcpu->mmio_is_write) {
1338 vcpu->mmio_needed = 0;
6aa8b732 1339 return EMULATE_DO_MMIO;
02c83209 1340 }
6aa8b732
AK		 1341
1342 return EMULATE_DONE;
1343}
1344EXPORT_SYMBOL_GPL(emulate_instruction);
1345
b6958ce4
ED		 1346/*
1347 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1348 */
c5ec1534 1349static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
d3bef15f 1350{
b6958ce4
ED		 1351 DECLARE_WAITQUEUE(wait, current);
1352
1353 add_wait_queue(&vcpu->wq, &wait);
1354
1355 /*
1356 * We will block until either an interrupt or a signal wakes us up
1357 */
c5ec1534
HQ		 1358 while (!kvm_cpu_has_interrupt(vcpu)
1359 && !signal_pending(current)
1360 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
1361 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
b6958ce4
ED		 1362 set_current_state(TASK_INTERRUPTIBLE);
1363 vcpu_put(vcpu);
1364 schedule();
1365 vcpu_load(vcpu);
1366 }
d3bef15f 1367
c5ec1534 1368 __set_current_state(TASK_RUNNING);
b6958ce4 1369 remove_wait_queue(&vcpu->wq, &wait);
b6958ce4
ED		 1370}
1371
1372int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1373{
d3bef15f 1374 ++vcpu->stat.halt_exits;
b6958ce4 1375 if (irqchip_in_kernel(vcpu->kvm)) {
c5ec1534
HQ		 1376 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1377 kvm_vcpu_block(vcpu);
1378 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1379 return -EINTR;
b6958ce4
ED		 1380 return 1;
1381 } else {
1382 vcpu->run->exit_reason = KVM_EXIT_HLT;
1383 return 0;
1384 }
d3bef15f
AK		 1385}
1386EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1387
7aa81cc0 1388int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
270fd9b9 1389{
7aa81cc0 1390 unsigned long nr, a0, a1, a2, a3, ret;
270fd9b9 1391
cbdd1bea 1392 kvm_x86_ops->cache_regs(vcpu);
7aa81cc0
AL		 1393
1394 nr = vcpu->regs[VCPU_REGS_RAX];
1395 a0 = vcpu->regs[VCPU_REGS_RBX];
1396 a1 = vcpu->regs[VCPU_REGS_RCX];
1397 a2 = vcpu->regs[VCPU_REGS_RDX];
1398 a3 = vcpu->regs[VCPU_REGS_RSI];
1399
1400 if (!is_long_mode(vcpu)) {
1401 nr &= 0xFFFFFFFF;
1402 a0 &= 0xFFFFFFFF;
1403 a1 &= 0xFFFFFFFF;
1404 a2 &= 0xFFFFFFFF;
1405 a3 &= 0xFFFFFFFF;
270fd9b9 1406 }
7aa81cc0 1407
270fd9b9
AK		 1408 switch (nr) {
1409 default:
7aa81cc0
AL		 1410 ret = -KVM_ENOSYS;
1411 break;
270fd9b9
AK		 1412 }
1413 vcpu->regs[VCPU_REGS_RAX] = ret;
cbdd1bea 1414 kvm_x86_ops->decache_regs(vcpu);
7aa81cc0
AL		 1415 return 0;
1416}
1417EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1418
1419int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1420{
1421 char instruction[3];
1422 int ret = 0;
1423
1424 mutex_lock(&vcpu->kvm->lock);
1425
1426 /*
1427 * Blow out the MMU to ensure that no other VCPU has an active mapping
1428 * to ensure that the updated hypercall appears atomically across all
1429 * VCPUs.
1430 */
1431 kvm_mmu_zap_all(vcpu->kvm);
1432
1433 kvm_x86_ops->cache_regs(vcpu);
1434 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1435 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1436 != X86EMUL_CONTINUE)
1437 ret = -EFAULT;
1438
1439 mutex_unlock(&vcpu->kvm->lock);
1440
1441 return ret;
270fd9b9 1442}
270fd9b9 1443
6aa8b732
AK		 1444static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1445{
1446 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1447}
1448
1449void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1450{
1451 struct descriptor_table dt = { limit, base };
1452
cbdd1bea 1453 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 1454}
1455
1456void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1457{
1458 struct descriptor_table dt = { limit, base };
1459
cbdd1bea 1460 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 1461}
1462
1463void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1464 unsigned long *rflags)
1465{
1466 lmsw(vcpu, msw);
cbdd1bea 1467 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1468}
1469
1470unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1471{
cbdd1bea 1472 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 1473 switch (cr) {
1474 case 0:
1475 return vcpu->cr0;
1476 case 2:
1477 return vcpu->cr2;
1478 case 3:
1479 return vcpu->cr3;
1480 case 4:
1481 return vcpu->cr4;
1482 default:
1483 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1484 return 0;
1485 }
1486}
1487
1488void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1489 unsigned long *rflags)
1490{
1491 switch (cr) {
1492 case 0:
1493 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
cbdd1bea 1494 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1495 break;
1496 case 2:
1497 vcpu->cr2 = val;
1498 break;
1499 case 3:
1500 set_cr3(vcpu, val);
1501 break;
1502 case 4:
1503 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1504 break;
1505 default:
1506 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1507 }
1508}
1509
3bab1f5d
AK		 1510int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1511{
1512 u64 data;
1513
1514 switch (msr) {
1515 case 0xc0010010: /* SYSCFG */
1516 case 0xc0010015: /* HWCR */
1517 case MSR_IA32_PLATFORM_ID:
1518 case MSR_IA32_P5_MC_ADDR:
1519 case MSR_IA32_P5_MC_TYPE:
1520 case MSR_IA32_MC0_CTL:
1521 case MSR_IA32_MCG_STATUS:
1522 case MSR_IA32_MCG_CAP:
1523 case MSR_IA32_MC0_MISC:
1524 case MSR_IA32_MC0_MISC+4:
1525 case MSR_IA32_MC0_MISC+8:
1526 case MSR_IA32_MC0_MISC+12:
1527 case MSR_IA32_MC0_MISC+16:
1528 case MSR_IA32_UCODE_REV:
a8d13ea2 1529 case MSR_IA32_PERF_STATUS:
2dc7094b 1530 case MSR_IA32_EBL_CR_POWERON:
3bab1f5d
AK		 1531 /* MTRR registers */
1532 case 0xfe:
1533 case 0x200 ... 0x2ff:
1534 data = 0;
1535 break;
a8d13ea2
AK		 1536 case 0xcd: /* fsb frequency */
1537 data = 3;
1538 break;
3bab1f5d 1539 case MSR_IA32_APICBASE:
7017fc3d 1540 data = kvm_get_apic_base(vcpu);
3bab1f5d 1541 break;
6f00e68f
AK		 1542 case MSR_IA32_MISC_ENABLE:
1543 data = vcpu->ia32_misc_enable_msr;
1544 break;
3bab1f5d
AK		 1545#ifdef CONFIG_X86_64
1546 case MSR_EFER:
1547 data = vcpu->shadow_efer;
1548 break;
1549#endif
1550 default:
f0242478 1551 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
3bab1f5d
AK		 1552 return 1;
1553 }
1554 *pdata = data;
1555 return 0;
1556}
1557EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1558
6aa8b732
AK		 1559/*
1560 * Reads an msr value (of 'msr_index') into 'pdata'.
1561 * Returns 0 on success, non-0 otherwise.
1562 * Assumes vcpu_load() was already called.
1563 */
35f3f286 1564int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
6aa8b732 1565{
cbdd1bea 1566 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
6aa8b732
AK		 1567}
1568
05b3e0c2 1569#ifdef CONFIG_X86_64
6aa8b732 1570
3bab1f5d 1571static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1572{
6aa8b732
AK		 1573 if (efer & EFER_RESERVED_BITS) {
1574 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1575 efer);
1576 inject_gp(vcpu);
1577 return;
1578 }
1579
1580 if (is_paging(vcpu)
1581 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1582 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1583 inject_gp(vcpu);
1584 return;
1585 }
1586
cbdd1bea 1587 kvm_x86_ops->set_efer(vcpu, efer);
7725f0ba 1588
6aa8b732
AK		 1589 efer &= ~EFER_LMA;
1590 efer |= vcpu->shadow_efer & EFER_LMA;
1591
1592 vcpu->shadow_efer = efer;
6aa8b732 1593}
6aa8b732
AK		 1594
1595#endif
1596
3bab1f5d
AK		 1597int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1598{
1599 switch (msr) {
1600#ifdef CONFIG_X86_64
1601 case MSR_EFER:
1602 set_efer(vcpu, data);
1603 break;
1604#endif
1605 case MSR_IA32_MC0_STATUS:
f0242478 1606 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
3bab1f5d
AK		 1607 __FUNCTION__, data);
1608 break;
0e5bf0d0 1609 case MSR_IA32_MCG_STATUS:
f0242478 1610 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
0e5bf0d0
SK		 1611 __FUNCTION__, data);
1612 break;
3bab1f5d
AK		 1613 case MSR_IA32_UCODE_REV:
1614 case MSR_IA32_UCODE_WRITE:
1615 case 0x200 ... 0x2ff: /* MTRRs */
1616 break;
1617 case MSR_IA32_APICBASE:
7017fc3d 1618 kvm_set_apic_base(vcpu, data);
3bab1f5d 1619 break;
6f00e68f
AK		 1620 case MSR_IA32_MISC_ENABLE:
1621 vcpu->ia32_misc_enable_msr = data;
1622 break;
3bab1f5d 1623 default:
f0242478 1624 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
3bab1f5d
AK		 1625 return 1;
1626 }
1627 return 0;
1628}
1629EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1630
6aa8b732
AK		 1631/*
1632 * Writes msr value into into the appropriate "register".
1633 * Returns 0 on success, non-0 otherwise.
1634 * Assumes vcpu_load() was already called.
1635 */
35f3f286 1636int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
6aa8b732 1637{
cbdd1bea 1638 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
6aa8b732
AK		 1639}
1640
1641void kvm_resched(struct kvm_vcpu *vcpu)
1642{
3fca0365
YD		 1643 if (!need_resched())
1644 return;
6aa8b732 1645 cond_resched();
6aa8b732
AK		 1646}
1647EXPORT_SYMBOL_GPL(kvm_resched);
1648
06465c5a
AK		 1649void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1650{
1651 int i;
1652 u32 function;
1653 struct kvm_cpuid_entry *e, *best;
1654
cbdd1bea 1655 kvm_x86_ops->cache_regs(vcpu);
06465c5a
AK		 1656 function = vcpu->regs[VCPU_REGS_RAX];
1657 vcpu->regs[VCPU_REGS_RAX] = 0;
1658 vcpu->regs[VCPU_REGS_RBX] = 0;
1659 vcpu->regs[VCPU_REGS_RCX] = 0;
1660 vcpu->regs[VCPU_REGS_RDX] = 0;
1661 best = NULL;
1662 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1663 e = &vcpu->cpuid_entries[i];
1664 if (e->function == function) {
1665 best = e;
1666 break;
1667 }
1668 /*
1669 * Both basic or both extended?
1670 */
1671 if (((e->function ^ function) & 0x80000000) == 0)
1672 if (!best || e->function > best->function)
1673 best = e;
1674 }
1675 if (best) {
1676 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1677 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1678 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1679 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1680 }
cbdd1bea
CE		 1681 kvm_x86_ops->decache_regs(vcpu);
1682 kvm_x86_ops->skip_emulated_instruction(vcpu);
06465c5a
AK		 1683}
1684EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1685
039576c0 1686static int pio_copy_data(struct kvm_vcpu *vcpu)
46fc1477 1687{
039576c0
AK		 1688 void *p = vcpu->pio_data;
1689 void *q;
1690 unsigned bytes;
1691 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1692
039576c0
AK		 1693 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1694 PAGE_KERNEL);
1695 if (!q) {
039576c0
AK		 1696 free_pio_guest_pages(vcpu);
1697 return -ENOMEM;
1698 }
1699 q += vcpu->pio.guest_page_offset;
1700 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1701 if (vcpu->pio.in)
1702 memcpy(q, p, bytes);
1703 else
1704 memcpy(p, q, bytes);
1705 q -= vcpu->pio.guest_page_offset;
1706 vunmap(q);
039576c0
AK		 1707 free_pio_guest_pages(vcpu);
1708 return 0;
1709}
1710
1711static int complete_pio(struct kvm_vcpu *vcpu)
1712{
1713 struct kvm_pio_request *io = &vcpu->pio;
46fc1477 1714 long delta;
039576c0 1715 int r;
46fc1477 1716
cbdd1bea 1717 kvm_x86_ops->cache_regs(vcpu);
46fc1477
AK		 1718
1719 if (!io->string) {
039576c0
AK		 1720 if (io->in)
1721 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
46fc1477
AK		 1722 io->size);
1723 } else {
039576c0
AK		 1724 if (io->in) {
1725 r = pio_copy_data(vcpu);
1726 if (r) {
cbdd1bea 1727 kvm_x86_ops->cache_regs(vcpu);
039576c0
AK		 1728 return r;
1729 }
1730 }
1731
46fc1477
AK		 1732 delta = 1;
1733 if (io->rep) {
039576c0 1734 delta *= io->cur_count;
46fc1477
AK		 1735 /*
1736 * The size of the register should really depend on
1737 * current address size.
1738 */
1739 vcpu->regs[VCPU_REGS_RCX] -= delta;
1740 }
039576c0 1741 if (io->down)
46fc1477
AK		 1742 delta = -delta;
1743 delta *= io->size;
039576c0 1744 if (io->in)
46fc1477
AK		 1745 vcpu->regs[VCPU_REGS_RDI] += delta;
1746 else
1747 vcpu->regs[VCPU_REGS_RSI] += delta;
1748 }
1749
cbdd1bea 1750 kvm_x86_ops->decache_regs(vcpu);
46fc1477 1751
039576c0
AK		 1752 io->count -= io->cur_count;
1753 io->cur_count = 0;
1754
039576c0 1755 return 0;
46fc1477
AK		 1756}
1757
65619eb5
ED		 1758static void kernel_pio(struct kvm_io_device *pio_dev,
1759 struct kvm_vcpu *vcpu,
1760 void *pd)
74906345
ED		 1761{
1762 /* TODO: String I/O for in kernel device */
1763
9cf98828 1764 mutex_lock(&vcpu->kvm->lock);
74906345
ED		 1765 if (vcpu->pio.in)
1766 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1767 vcpu->pio.size,
65619eb5 1768 pd);
74906345
ED		 1769 else
1770 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1771 vcpu->pio.size,
65619eb5 1772 pd);
9cf98828 1773 mutex_unlock(&vcpu->kvm->lock);
65619eb5
ED		 1774}
1775
1776static void pio_string_write(struct kvm_io_device *pio_dev,
1777 struct kvm_vcpu *vcpu)
1778{
1779 struct kvm_pio_request *io = &vcpu->pio;
1780 void *pd = vcpu->pio_data;
1781 int i;
1782
9cf98828 1783 mutex_lock(&vcpu->kvm->lock);
65619eb5
ED		 1784 for (i = 0; i < io->cur_count; i++) {
1785 kvm_iodevice_write(pio_dev, io->port,
1786 io->size,
1787 pd);
1788 pd += io->size;
1789 }
9cf98828 1790 mutex_unlock(&vcpu->kvm->lock);
74906345
ED		 1791}
1792
3090dd73
LV		 1793int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1794 int size, unsigned port)
1795{
1796 struct kvm_io_device *pio_dev;
1797
1798 vcpu->run->exit_reason = KVM_EXIT_IO;
1799 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1800 vcpu->run->io.size = vcpu->pio.size = size;
1801 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1802 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1803 vcpu->run->io.port = vcpu->pio.port = port;
1804 vcpu->pio.in = in;
1805 vcpu->pio.string = 0;
1806 vcpu->pio.down = 0;
1807 vcpu->pio.guest_page_offset = 0;
1808 vcpu->pio.rep = 0;
1809
cbdd1bea 1810 kvm_x86_ops->cache_regs(vcpu);
3090dd73 1811 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
cbdd1bea 1812 kvm_x86_ops->decache_regs(vcpu);
3090dd73 1813
0967b7bf
AK		 1814 kvm_x86_ops->skip_emulated_instruction(vcpu);
1815
3090dd73
LV		 1816 pio_dev = vcpu_find_pio_dev(vcpu, port);
1817 if (pio_dev) {
1818 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1819 complete_pio(vcpu);
1820 return 1;
1821 }
1822 return 0;
1823}
1824EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1825
1826int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1827 int size, unsigned long count, int down,
039576c0
AK		 1828 gva_t address, int rep, unsigned port)
1829{
1830 unsigned now, in_page;
65619eb5 1831 int i, ret = 0;
039576c0
AK		 1832 int nr_pages = 1;
1833 struct page *page;
74906345 1834 struct kvm_io_device *pio_dev;
039576c0
AK		 1835
1836 vcpu->run->exit_reason = KVM_EXIT_IO;
1837 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3090dd73 1838 vcpu->run->io.size = vcpu->pio.size = size;
039576c0 1839 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3090dd73
LV		 1840 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1841 vcpu->run->io.port = vcpu->pio.port = port;
039576c0 1842 vcpu->pio.in = in;
3090dd73 1843 vcpu->pio.string = 1;
039576c0
AK		 1844 vcpu->pio.down = down;
1845 vcpu->pio.guest_page_offset = offset_in_page(address);
1846 vcpu->pio.rep = rep;
1847
039576c0 1848 if (!count) {
cbdd1bea 1849 kvm_x86_ops->skip_emulated_instruction(vcpu);
039576c0
AK		 1850 return 1;
1851 }
1852
039576c0
AK		 1853 if (!down)
1854 in_page = PAGE_SIZE - offset_in_page(address);
1855 else
1856 in_page = offset_in_page(address) + size;
1857 now = min(count, (unsigned long)in_page / size);
1858 if (!now) {
1859 /*
1860 * String I/O straddles page boundary. Pin two guest pages
1861 * so that we satisfy atomicity constraints. Do just one
1862 * transaction to avoid complexity.
1863 */
1864 nr_pages = 2;
1865 now = 1;
1866 }
1867 if (down) {
1868 /*
1869 * String I/O in reverse. Yuck. Kill the guest, fix later.
1870 */
f0242478 1871 pr_unimpl(vcpu, "guest string pio down\n");
039576c0
AK		 1872 inject_gp(vcpu);
1873 return 1;
1874 }
1875 vcpu->run->io.count = now;
1876 vcpu->pio.cur_count = now;
1877
0967b7bf
AK		 1878 if (vcpu->pio.cur_count == vcpu->pio.count)
1879 kvm_x86_ops->skip_emulated_instruction(vcpu);
1880
039576c0 1881 for (i = 0; i < nr_pages; ++i) {
11ec2804 1882 mutex_lock(&vcpu->kvm->lock);
039576c0
AK		 1883 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1884 if (page)
1885 get_page(page);
1886 vcpu->pio.guest_pages[i] = page;
11ec2804 1887 mutex_unlock(&vcpu->kvm->lock);
039576c0
AK		 1888 if (!page) {
1889 inject_gp(vcpu);
1890 free_pio_guest_pages(vcpu);
1891 return 1;
1892 }
1893 }
1894
3090dd73 1895 pio_dev = vcpu_find_pio_dev(vcpu, port);
65619eb5
ED		 1896 if (!vcpu->pio.in) {
1897 /* string PIO write */
1898 ret = pio_copy_data(vcpu);
1899 if (ret >= 0 && pio_dev) {
1900 pio_string_write(pio_dev, vcpu);
1901 complete_pio(vcpu);
1902 if (vcpu->pio.count == 0)
1903 ret = 1;
1904 }
1905 } else if (pio_dev)
f0242478 1906 pr_unimpl(vcpu, "no string pio read support yet, "
65619eb5
ED		 1907 "port %x size %d count %ld\n",
1908 port, size, count);
1909
1910 return ret;
039576c0 1911}
3090dd73 1912EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
039576c0 1913
04d2cc77
AK		 1914/*
1915 * Check if userspace requested an interrupt window, and that the
1916 * interrupt window is open.
1917 *
1918 * No need to exit to userspace if we already have an interrupt queued.
1919 */
1920static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1921 struct kvm_run *kvm_run)
1922{
1923 return (!vcpu->irq_summary &&
1924 kvm_run->request_interrupt_window &&
1925 vcpu->interrupt_window_open &&
1926 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
1927}
1928
1929static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1930 struct kvm_run *kvm_run)
1931{
1932 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
1933 kvm_run->cr8 = get_cr8(vcpu);
1934 kvm_run->apic_base = kvm_get_apic_base(vcpu);
1935 if (irqchip_in_kernel(vcpu->kvm))
1936 kvm_run->ready_for_interrupt_injection = 1;
1937 else
1938 kvm_run->ready_for_interrupt_injection =
1939 (vcpu->interrupt_window_open &&
1940 vcpu->irq_summary == 0);
1941}
1942
1943static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1944{
1945 int r;
1946
1947 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
1948 printk("vcpu %d received sipi with vector # %x\n",
1949 vcpu->vcpu_id, vcpu->sipi_vector);
1950 kvm_lapic_reset(vcpu);
1951 kvm_x86_ops->vcpu_reset(vcpu);
1952 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
1953 }
1954
1955preempted:
1956 if (vcpu->guest_debug.enabled)
1957 kvm_x86_ops->guest_debug_pre(vcpu);
1958
1959again:
1960 r = kvm_mmu_reload(vcpu);
1961 if (unlikely(r))
1962 goto out;
1963
1964 preempt_disable();
1965
1966 kvm_x86_ops->prepare_guest_switch(vcpu);
1967 kvm_load_guest_fpu(vcpu);
1968
1969 local_irq_disable();
1970
1971 if (signal_pending(current)) {
1972 local_irq_enable();
1973 preempt_enable();
1974 r = -EINTR;
1975 kvm_run->exit_reason = KVM_EXIT_INTR;
1976 ++vcpu->stat.signal_exits;
1977 goto out;
1978 }
1979
1980 if (irqchip_in_kernel(vcpu->kvm))
1981 kvm_x86_ops->inject_pending_irq(vcpu);
1982 else if (!vcpu->mmio_read_completed)
1983 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
1984
1985 vcpu->guest_mode = 1;
d172fcd3 1986 kvm_guest_enter();
04d2cc77
AK		 1987
1988 if (vcpu->requests)
1989 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
1990 kvm_x86_ops->tlb_flush(vcpu);
1991
1992 kvm_x86_ops->run(vcpu, kvm_run);
1993
1994 vcpu->guest_mode = 0;
1995 local_irq_enable();
1996
1997 ++vcpu->stat.exits;
1998
0552f73b
LV		 1999 /*
2000 * We must have an instruction between local_irq_enable() and
2001 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2002 * the interrupt shadow. The stat.exits increment will do nicely.
2003 * But we need to prevent reordering, hence this barrier():
2004 */
2005 barrier();
2006
2007 kvm_guest_exit();
2008
04d2cc77
AK		 2009 preempt_enable();
2010
2011 /*
2012 * Profile KVM exit RIPs:
2013 */
2014 if (unlikely(prof_on == KVM_PROFILING)) {
2015 kvm_x86_ops->cache_regs(vcpu);
2016 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2017 }
2018
2019 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2020
2021 if (r > 0) {
2022 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2023 r = -EINTR;
2024 kvm_run->exit_reason = KVM_EXIT_INTR;
2025 ++vcpu->stat.request_irq_exits;
2026 goto out;
2027 }
2028 if (!need_resched()) {
2029 ++vcpu->stat.light_exits;
2030 goto again;
2031 }
2032 }
2033
2034out:
2035 if (r > 0) {
2036 kvm_resched(vcpu);
2037 goto preempted;
2038 }
2039
2040 post_kvm_run_save(vcpu, kvm_run);
2041
2042 return r;
2043}
2044
2045
bccf2150 2046static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 2047{
6aa8b732 2048 int r;
1961d276 2049 sigset_t sigsaved;
6aa8b732 2050
bccf2150 2051 vcpu_load(vcpu);
6aa8b732 2052
c5ec1534
HQ		 2053 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2054 kvm_vcpu_block(vcpu);
2055 vcpu_put(vcpu);
2056 return -EAGAIN;
2057 }
2058
1961d276
AK		 2059 if (vcpu->sigset_active)
2060 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2061
54810342 2062 /* re-sync apic's tpr */
5cd4f6fd
HQ		 2063 if (!irqchip_in_kernel(vcpu->kvm))
2064 set_cr8(vcpu, kvm_run->cr8);
54810342 2065
02c83209
AK		 2066 if (vcpu->pio.cur_count) {
2067 r = complete_pio(vcpu);
2068 if (r)
2069 goto out;
2070 }
2071
2072 if (vcpu->mmio_needed) {
2073 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2074 vcpu->mmio_read_completed = 1;
2075 vcpu->mmio_needed = 0;
2076 r = emulate_instruction(vcpu, kvm_run,
3427318f 2077 vcpu->mmio_fault_cr2, 0, 1);
02c83209
AK		 2078 if (r == EMULATE_DO_MMIO) {
2079 /*
2080 * Read-modify-write. Back to userspace.
2081 */
02c83209
AK		 2082 r = 0;
2083 goto out;
46fc1477 2084 }
6aa8b732
AK		 2085 }
2086
8eb7d334 2087 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
cbdd1bea 2088 kvm_x86_ops->cache_regs(vcpu);
b4e63f56 2089 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
cbdd1bea 2090 kvm_x86_ops->decache_regs(vcpu);
b4e63f56
AK		 2091 }
2092
04d2cc77 2093 r = __vcpu_run(vcpu, kvm_run);
6aa8b732 2094
039576c0 2095out:
1961d276
AK		 2096 if (vcpu->sigset_active)
2097 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2098
6aa8b732
AK		 2099 vcpu_put(vcpu);
2100 return r;
2101}
2102
bccf2150
AK		 2103static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2104 struct kvm_regs *regs)
6aa8b732 2105{
bccf2150 2106 vcpu_load(vcpu);
6aa8b732 2107
cbdd1bea 2108 kvm_x86_ops->cache_regs(vcpu);
6aa8b732
AK		 2109
2110 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2111 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2112 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2113 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2114 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2115 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2116 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2117 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 2118#ifdef CONFIG_X86_64
6aa8b732
AK		 2119 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2120 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2121 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2122 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2123 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2124 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2125 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2126 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2127#endif
2128
2129 regs->rip = vcpu->rip;
cbdd1bea 2130 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 2131
2132 /*
2133 * Don't leak debug flags in case they were set for guest debugging
2134 */
2135 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2136 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2137
2138 vcpu_put(vcpu);
2139
2140 return 0;
2141}
2142
bccf2150
AK		 2143static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2144 struct kvm_regs *regs)
6aa8b732 2145{
bccf2150 2146 vcpu_load(vcpu);
6aa8b732
AK		 2147
2148 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2149 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2150 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2151 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2152 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2153 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2154 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2155 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 2156#ifdef CONFIG_X86_64
6aa8b732
AK		 2157 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2158 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2159 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2160 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2161 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2162 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2163 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2164 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2165#endif
2166
2167 vcpu->rip = regs->rip;
cbdd1bea 2168 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
6aa8b732 2169
cbdd1bea 2170 kvm_x86_ops->decache_regs(vcpu);
6aa8b732
AK		 2171
2172 vcpu_put(vcpu);
2173
2174 return 0;
2175}
2176
2177static void get_segment(struct kvm_vcpu *vcpu,
2178 struct kvm_segment *var, int seg)
2179{
cbdd1bea 2180 return kvm_x86_ops->get_segment(vcpu, var, seg);
6aa8b732
AK		 2181}
2182
bccf2150
AK		 2183static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2184 struct kvm_sregs *sregs)
6aa8b732 2185{
6aa8b732 2186 struct descriptor_table dt;
2a8067f1 2187 int pending_vec;
6aa8b732 2188
bccf2150 2189 vcpu_load(vcpu);
6aa8b732
AK		 2190
2191 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2192 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2193 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2194 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2195 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2196 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2197
2198 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2199 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2200
cbdd1bea 2201 kvm_x86_ops->get_idt(vcpu, &dt);
6aa8b732
AK		 2202 sregs->idt.limit = dt.limit;
2203 sregs->idt.base = dt.base;
cbdd1bea 2204 kvm_x86_ops->get_gdt(vcpu, &dt);
6aa8b732
AK		 2205 sregs->gdt.limit = dt.limit;
2206 sregs->gdt.base = dt.base;
2207
cbdd1bea 2208 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 2209 sregs->cr0 = vcpu->cr0;
2210 sregs->cr2 = vcpu->cr2;
2211 sregs->cr3 = vcpu->cr3;
2212 sregs->cr4 = vcpu->cr4;
7017fc3d 2213 sregs->cr8 = get_cr8(vcpu);
6aa8b732 2214 sregs->efer = vcpu->shadow_efer;
7017fc3d 2215 sregs->apic_base = kvm_get_apic_base(vcpu);
6aa8b732 2216
2a8067f1 2217 if (irqchip_in_kernel(vcpu->kvm)) {
c52fb35a
HQ		 2218 memset(sregs->interrupt_bitmap, 0,
2219 sizeof sregs->interrupt_bitmap);
cbdd1bea 2220 pending_vec = kvm_x86_ops->get_irq(vcpu);
2a8067f1
ED		 2221 if (pending_vec >= 0)
2222 set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap);
2223 } else
c52fb35a
HQ		 2224 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2225 sizeof sregs->interrupt_bitmap);
6aa8b732
AK		 2226
2227 vcpu_put(vcpu);
2228
2229 return 0;
2230}
2231
2232static void set_segment(struct kvm_vcpu *vcpu,
2233 struct kvm_segment *var, int seg)
2234{
cbdd1bea 2235 return kvm_x86_ops->set_segment(vcpu, var, seg);
6aa8b732
AK		 2236}
2237
bccf2150
AK		 2238static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2239 struct kvm_sregs *sregs)
6aa8b732 2240{
6aa8b732 2241 int mmu_reset_needed = 0;
2a8067f1 2242 int i, pending_vec, max_bits;
6aa8b732
AK		 2243 struct descriptor_table dt;
2244
bccf2150 2245 vcpu_load(vcpu);
6aa8b732 2246
6aa8b732
AK		 2247 dt.limit = sregs->idt.limit;
2248 dt.base = sregs->idt.base;
cbdd1bea 2249 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 2250 dt.limit = sregs->gdt.limit;
2251 dt.base = sregs->gdt.base;
cbdd1bea 2252 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 2253
2254 vcpu->cr2 = sregs->cr2;
2255 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2256 vcpu->cr3 = sregs->cr3;
2257
7017fc3d 2258 set_cr8(vcpu, sregs->cr8);
6aa8b732
AK		 2259
2260 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 2261#ifdef CONFIG_X86_64
cbdd1bea 2262 kvm_x86_ops->set_efer(vcpu, sregs->efer);
6aa8b732 2263#endif
7017fc3d 2264 kvm_set_apic_base(vcpu, sregs->apic_base);
6aa8b732 2265
cbdd1bea 2266 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
399badf3 2267
6aa8b732 2268 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
81f50e3b 2269 vcpu->cr0 = sregs->cr0;
cbdd1bea 2270 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
6aa8b732
AK		 2271
2272 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
cbdd1bea 2273 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 2274 if (!is_long_mode(vcpu) && is_pae(vcpu))
2275 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 2276
2277 if (mmu_reset_needed)
2278 kvm_mmu_reset_context(vcpu);
2279
c52fb35a
HQ		 2280 if (!irqchip_in_kernel(vcpu->kvm)) {
2281 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2282 sizeof vcpu->irq_pending);
2283 vcpu->irq_summary = 0;
2284 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2285 if (vcpu->irq_pending[i])
2286 __set_bit(i, &vcpu->irq_summary);
2a8067f1
ED		 2287 } else {
2288 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2289 pending_vec = find_first_bit(
2290 (const unsigned long *)sregs->interrupt_bitmap,
2291 max_bits);
2292 /* Only pending external irq is handled here */
2293 if (pending_vec < max_bits) {
cbdd1bea 2294 kvm_x86_ops->set_irq(vcpu, pending_vec);
2a8067f1
ED		 2295 printk("Set back pending irq %d\n", pending_vec);
2296 }
c52fb35a 2297 }
6aa8b732 2298
024aa1c0
AK		 2299 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2300 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2301 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2302 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2303 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2304 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2305
2306 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2307 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2308
6aa8b732
AK		 2309 vcpu_put(vcpu);
2310
2311 return 0;
2312}
2313
1747fb71
RR		 2314void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2315{
2316 struct kvm_segment cs;
2317
2318 get_segment(vcpu, &cs, VCPU_SREG_CS);
2319 *db = cs.db;
2320 *l = cs.l;
2321}
2322EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2323
6aa8b732
AK		 2324/*
2325 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
2326 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
bf591b24
MR		 2327 *
2328 * This list is modified at module load time to reflect the
2329 * capabilities of the host cpu.
6aa8b732
AK		 2330 */
2331static u32 msrs_to_save[] = {
2332 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
2333 MSR_K6_STAR,
05b3e0c2 2334#ifdef CONFIG_X86_64
6aa8b732
AK		 2335 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
2336#endif
2337 MSR_IA32_TIME_STAMP_COUNTER,
2338};
2339
bf591b24
MR		 2340static unsigned num_msrs_to_save;
2341
6f00e68f
AK		 2342static u32 emulated_msrs[] = {
2343 MSR_IA32_MISC_ENABLE,
2344};
2345
bf591b24
MR		 2346static __init void kvm_init_msr_list(void)
2347{
2348 u32 dummy[2];
2349 unsigned i, j;
2350
2351 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
2352 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
2353 continue;
2354 if (j < i)
2355 msrs_to_save[j] = msrs_to_save[i];
2356 j++;
2357 }
2358 num_msrs_to_save = j;
2359}
6aa8b732
AK		 2360
2361/*
2362 * Adapt set_msr() to msr_io()'s calling convention
2363 */
2364static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
2365{
35f3f286 2366 return kvm_set_msr(vcpu, index, *data);
6aa8b732
AK		 2367}
2368
2369/*
2370 * Read or write a bunch of msrs. All parameters are kernel addresses.
2371 *
2372 * @return number of msrs set successfully.
2373 */
bccf2150 2374static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
6aa8b732
AK		 2375 struct kvm_msr_entry *entries,
2376 int (*do_msr)(struct kvm_vcpu *vcpu,
2377 unsigned index, u64 *data))
2378{
6aa8b732
AK		 2379 int i;
2380
bccf2150 2381 vcpu_load(vcpu);
6aa8b732
AK		 2382
2383 for (i = 0; i < msrs->nmsrs; ++i)
2384 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2385 break;
2386
2387 vcpu_put(vcpu);
2388
2389 return i;
2390}
2391
2392/*
2393 * Read or write a bunch of msrs. Parameters are user addresses.
2394 *
2395 * @return number of msrs set successfully.
2396 */
bccf2150 2397static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
6aa8b732
AK		 2398 int (*do_msr)(struct kvm_vcpu *vcpu,
2399 unsigned index, u64 *data),
2400 int writeback)
2401{
2402 struct kvm_msrs msrs;
2403 struct kvm_msr_entry *entries;
2404 int r, n;
2405 unsigned size;
2406
2407 r = -EFAULT;
2408 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2409 goto out;
2410
2411 r = -E2BIG;
2412 if (msrs.nmsrs >= MAX_IO_MSRS)
2413 goto out;
2414
2415 r = -ENOMEM;
2416 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
2417 entries = vmalloc(size);
2418 if (!entries)
2419 goto out;
2420
2421 r = -EFAULT;
2422 if (copy_from_user(entries, user_msrs->entries, size))
2423 goto out_free;
2424
bccf2150 2425 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
6aa8b732
AK		 2426 if (r < 0)
2427 goto out_free;
2428
2429 r = -EFAULT;
2430 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2431 goto out_free;
2432
2433 r = n;
2434
2435out_free:
2436 vfree(entries);
2437out:
2438 return r;
2439}
2440
2441/*
2442 * Translate a guest virtual address to a guest physical address.
2443 */
bccf2150
AK		 2444static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2445 struct kvm_translation *tr)
6aa8b732
AK		 2446{
2447 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 2448 gpa_t gpa;
2449
bccf2150 2450 vcpu_load(vcpu);
11ec2804 2451 mutex_lock(&vcpu->kvm->lock);
6aa8b732
AK		 2452 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2453 tr->physical_address = gpa;
2454 tr->valid = gpa != UNMAPPED_GVA;
2455 tr->writeable = 1;
2456 tr->usermode = 0;
11ec2804 2457 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 2458 vcpu_put(vcpu);
2459
2460 return 0;
2461}
2462
bccf2150
AK		 2463static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2464 struct kvm_interrupt *irq)
6aa8b732 2465{
6aa8b732
AK		 2466 if (irq->irq < 0 || irq->irq >= 256)
2467 return -EINVAL;
97222cc8
ED		 2468 if (irqchip_in_kernel(vcpu->kvm))
2469 return -ENXIO;
bccf2150 2470 vcpu_load(vcpu);
6aa8b732
AK		 2471
2472 set_bit(irq->irq, vcpu->irq_pending);
2473 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2474
2475 vcpu_put(vcpu);
2476
2477 return 0;
2478}
2479
bccf2150
AK		 2480static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2481 struct kvm_debug_guest *dbg)
6aa8b732 2482{
6aa8b732
AK		 2483 int r;
2484
bccf2150 2485 vcpu_load(vcpu);
6aa8b732 2486
cbdd1bea 2487 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
6aa8b732
AK		 2488
2489 vcpu_put(vcpu);
2490
2491 return r;
2492}
2493
9a2bb7f4
AK		 2494static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2495 unsigned long address,
2496 int *type)
2497{
2498 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2499 unsigned long pgoff;
2500 struct page *page;
2501
9a2bb7f4 2502 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
039576c0
AK		 2503 if (pgoff == 0)
2504 page = virt_to_page(vcpu->run);
2505 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2506 page = virt_to_page(vcpu->pio_data);
2507 else
9a2bb7f4 2508 return NOPAGE_SIGBUS;
9a2bb7f4 2509 get_page(page);
cd0d9137
NAQ		 2510 if (type != NULL)
2511 *type = VM_FAULT_MINOR;
2512
9a2bb7f4
AK		 2513 return page;
2514}
2515
2516static struct vm_operations_struct kvm_vcpu_vm_ops = {
2517 .nopage = kvm_vcpu_nopage,
2518};
2519
2520static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2521{
2522 vma->vm_ops = &kvm_vcpu_vm_ops;
2523 return 0;
2524}
2525
bccf2150
AK		 2526static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2527{
2528 struct kvm_vcpu *vcpu = filp->private_data;
2529
2530 fput(vcpu->kvm->filp);
2531 return 0;
2532}
2533
2534static struct file_operations kvm_vcpu_fops = {
2535 .release = kvm_vcpu_release,
2536 .unlocked_ioctl = kvm_vcpu_ioctl,
2537 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 2538 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 2539};
2540
2541/*
2542 * Allocates an inode for the vcpu.
2543 */
2544static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2545{
2546 int fd, r;
2547 struct inode *inode;
2548 struct file *file;
2549
d6d28168
AK		 2550 r = anon_inode_getfd(&fd, &inode, &file,
2551 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2552 if (r)
2553 return r;
bccf2150 2554 atomic_inc(&vcpu->kvm->filp->f_count);
bccf2150 2555 return fd;
bccf2150
AK		 2556}
2557
c5ea7660
AK		 2558/*
2559 * Creates some virtual cpus. Good luck creating more than one.
2560 */
2561static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2562{
2563 int r;
2564 struct kvm_vcpu *vcpu;
2565
c5ea7660 2566 if (!valid_vcpu(n))
fb3f0f51 2567 return -EINVAL;
c5ea7660 2568
cbdd1bea 2569 vcpu = kvm_x86_ops->vcpu_create(kvm, n);
fb3f0f51
RR		 2570 if (IS_ERR(vcpu))
2571 return PTR_ERR(vcpu);
c5ea7660 2572
15ad7146
AK		 2573 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2574
b114b080
RR		 2575 /* We do fxsave: this must be aligned. */
2576 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2577
fb3f0f51 2578 vcpu_load(vcpu);
c5ea7660 2579 r = kvm_mmu_setup(vcpu);
c5ea7660 2580 vcpu_put(vcpu);
c5ea7660 2581 if (r < 0)
fb3f0f51
RR		 2582 goto free_vcpu;
2583
11ec2804 2584 mutex_lock(&kvm->lock);
fb3f0f51
RR		 2585 if (kvm->vcpus[n]) {
2586 r = -EEXIST;
11ec2804 2587 mutex_unlock(&kvm->lock);
fb3f0f51
RR		 2588 goto mmu_unload;
2589 }
2590 kvm->vcpus[n] = vcpu;
11ec2804 2591 mutex_unlock(&kvm->lock);
c5ea7660 2592
fb3f0f51 2593 /* Now it's all set up, let userspace reach it */
bccf2150
AK		 2594 r = create_vcpu_fd(vcpu);
2595 if (r < 0)
fb3f0f51
RR		 2596 goto unlink;
2597 return r;
39c3b86e 2598
fb3f0f51 2599unlink:
11ec2804 2600 mutex_lock(&kvm->lock);
fb3f0f51 2601 kvm->vcpus[n] = NULL;
11ec2804 2602 mutex_unlock(&kvm->lock);
a2fa3e9f 2603
fb3f0f51
RR		 2604mmu_unload:
2605 vcpu_load(vcpu);
2606 kvm_mmu_unload(vcpu);
2607 vcpu_put(vcpu);
c5ea7660 2608
fb3f0f51 2609free_vcpu:
cbdd1bea 2610 kvm_x86_ops->vcpu_free(vcpu);
c5ea7660
AK		 2611 return r;
2612}
2613
2cc51560
ED		 2614static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
2615{
2616 u64 efer;
2617 int i;
2618 struct kvm_cpuid_entry *e, *entry;
2619
2620 rdmsrl(MSR_EFER, efer);
2621 entry = NULL;
2622 for (i = 0; i < vcpu->cpuid_nent; ++i) {
2623 e = &vcpu->cpuid_entries[i];
2624 if (e->function == 0x80000001) {
2625 entry = e;
2626 break;
2627 }
2628 }
4c981b43 2629 if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
2cc51560 2630 entry->edx &= ~(1 << 20);
4c981b43 2631 printk(KERN_INFO "kvm: guest NX capability removed\n");
2cc51560
ED		 2632 }
2633}
2634
06465c5a
AK		 2635static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
2636 struct kvm_cpuid *cpuid,
2637 struct kvm_cpuid_entry __user *entries)
2638{
2639 int r;
2640
2641 r = -E2BIG;
2642 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2643 goto out;
2644 r = -EFAULT;
2645 if (copy_from_user(&vcpu->cpuid_entries, entries,
2646 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
2647 goto out;
2648 vcpu->cpuid_nent = cpuid->nent;
2cc51560 2649 cpuid_fix_nx_cap(vcpu);
06465c5a
AK		 2650 return 0;
2651
2652out:
2653 return r;
2654}
2655
1961d276
AK		 2656static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2657{
2658 if (sigset) {
2659 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2660 vcpu->sigset_active = 1;
2661 vcpu->sigset = *sigset;
2662 } else
2663 vcpu->sigset_active = 0;
2664 return 0;
2665}
2666
b8836737
AK		 2667/*
2668 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2669 * we have asm/x86/processor.h
2670 */
2671struct fxsave {
2672 u16 cwd;
2673 u16 swd;
2674 u16 twd;
2675 u16 fop;
2676 u64 rip;
2677 u64 rdp;
2678 u32 mxcsr;
2679 u32 mxcsr_mask;
2680 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2681#ifdef CONFIG_X86_64
2682 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2683#else
2684 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2685#endif
2686};
2687
2688static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2689{
b114b080 2690 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2691
2692 vcpu_load(vcpu);
2693
2694 memcpy(fpu->fpr, fxsave->st_space, 128);
2695 fpu->fcw = fxsave->cwd;
2696 fpu->fsw = fxsave->swd;
2697 fpu->ftwx = fxsave->twd;
2698 fpu->last_opcode = fxsave->fop;
2699 fpu->last_ip = fxsave->rip;
2700 fpu->last_dp = fxsave->rdp;
2701 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2702
2703 vcpu_put(vcpu);
2704
2705 return 0;
2706}
2707
2708static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2709{
b114b080 2710 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2711
2712 vcpu_load(vcpu);
2713
2714 memcpy(fxsave->st_space, fpu->fpr, 128);
2715 fxsave->cwd = fpu->fcw;
2716 fxsave->swd = fpu->fsw;
2717 fxsave->twd = fpu->ftwx;
2718 fxsave->fop = fpu->last_opcode;
2719 fxsave->rip = fpu->last_ip;
2720 fxsave->rdp = fpu->last_dp;
2721 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2722
2723 vcpu_put(vcpu);
2724
2725 return 0;
2726}
2727
96ad2cc6
ED		 2728static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2729 struct kvm_lapic_state *s)
2730{
2731 vcpu_load(vcpu);
2732 memcpy(s->regs, vcpu->apic->regs, sizeof *s);
2733 vcpu_put(vcpu);
2734
2735 return 0;
2736}
2737
2738static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2739 struct kvm_lapic_state *s)
2740{
2741 vcpu_load(vcpu);
2742 memcpy(vcpu->apic->regs, s->regs, sizeof *s);
2743 kvm_apic_post_state_restore(vcpu);
2744 vcpu_put(vcpu);
2745
2746 return 0;
2747}
2748
bccf2150
AK		 2749static long kvm_vcpu_ioctl(struct file *filp,
2750 unsigned int ioctl, unsigned long arg)
6aa8b732 2751{
bccf2150 2752 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 2753 void __user *argp = (void __user *)arg;
6aa8b732
AK		 2754 int r = -EINVAL;
2755
2756 switch (ioctl) {
9a2bb7f4 2757 case KVM_RUN:
f0fe5108
AK		 2758 r = -EINVAL;
2759 if (arg)
2760 goto out;
9a2bb7f4 2761 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 2762 break;
6aa8b732
AK		 2763 case KVM_GET_REGS: {
2764 struct kvm_regs kvm_regs;
2765
bccf2150
AK		 2766 memset(&kvm_regs, 0, sizeof kvm_regs);
2767 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2768 if (r)
2769 goto out;
2770 r = -EFAULT;
2f366987 2771 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2772 goto out;
2773 r = 0;
2774 break;
2775 }
2776 case KVM_SET_REGS: {
2777 struct kvm_regs kvm_regs;
2778
2779 r = -EFAULT;
2f366987 2780 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2781 goto out;
bccf2150 2782 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2783 if (r)
2784 goto out;
2785 r = 0;
2786 break;
2787 }
2788 case KVM_GET_SREGS: {
2789 struct kvm_sregs kvm_sregs;
2790
bccf2150
AK		 2791 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2792 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2793 if (r)
2794 goto out;
2795 r = -EFAULT;
2f366987 2796 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2797 goto out;
2798 r = 0;
2799 break;
2800 }
2801 case KVM_SET_SREGS: {
2802 struct kvm_sregs kvm_sregs;
2803
2804 r = -EFAULT;
2f366987 2805 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2806 goto out;
bccf2150 2807 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2808 if (r)
2809 goto out;
2810 r = 0;
2811 break;
2812 }
2813 case KVM_TRANSLATE: {
2814 struct kvm_translation tr;
2815
2816 r = -EFAULT;
2f366987 2817 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2818 goto out;
bccf2150 2819 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2820 if (r)
2821 goto out;
2822 r = -EFAULT;
2f366987 2823 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2824 goto out;
2825 r = 0;
2826 break;
2827 }
2828 case KVM_INTERRUPT: {
2829 struct kvm_interrupt irq;
2830
2831 r = -EFAULT;
2f366987 2832 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2833 goto out;
bccf2150 2834 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2835 if (r)
2836 goto out;
2837 r = 0;
2838 break;
2839 }
2840 case KVM_DEBUG_GUEST: {
2841 struct kvm_debug_guest dbg;
2842
2843 r = -EFAULT;
2f366987 2844 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2845 goto out;
bccf2150 2846 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2847 if (r)
2848 goto out;
2849 r = 0;
2850 break;
2851 }
bccf2150 2852 case KVM_GET_MSRS:
35f3f286 2853 r = msr_io(vcpu, argp, kvm_get_msr, 1);
bccf2150
AK		 2854 break;
2855 case KVM_SET_MSRS:
2856 r = msr_io(vcpu, argp, do_set_msr, 0);
2857 break;
06465c5a
AK		 2858 case KVM_SET_CPUID: {
2859 struct kvm_cpuid __user *cpuid_arg = argp;
2860 struct kvm_cpuid cpuid;
2861
2862 r = -EFAULT;
2863 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2864 goto out;
2865 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2866 if (r)
2867 goto out;
2868 break;
2869 }
1961d276
AK		 2870 case KVM_SET_SIGNAL_MASK: {
2871 struct kvm_signal_mask __user *sigmask_arg = argp;
2872 struct kvm_signal_mask kvm_sigmask;
2873 sigset_t sigset, *p;
2874
2875 p = NULL;
2876 if (argp) {
2877 r = -EFAULT;
2878 if (copy_from_user(&kvm_sigmask, argp,
2879 sizeof kvm_sigmask))
2880 goto out;
2881 r = -EINVAL;
2882 if (kvm_sigmask.len != sizeof sigset)
2883 goto out;
2884 r = -EFAULT;
2885 if (copy_from_user(&sigset, sigmask_arg->sigset,
2886 sizeof sigset))
2887 goto out;
2888 p = &sigset;
2889 }
2890 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2891 break;
2892 }
b8836737
AK		 2893 case KVM_GET_FPU: {
2894 struct kvm_fpu fpu;
2895
2896 memset(&fpu, 0, sizeof fpu);
2897 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2898 if (r)
2899 goto out;
2900 r = -EFAULT;
2901 if (copy_to_user(argp, &fpu, sizeof fpu))
2902 goto out;
2903 r = 0;
2904 break;
2905 }
2906 case KVM_SET_FPU: {
2907 struct kvm_fpu fpu;
2908
2909 r = -EFAULT;
2910 if (copy_from_user(&fpu, argp, sizeof fpu))
2911 goto out;
2912 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2913 if (r)
2914 goto out;
2915 r = 0;
2916 break;
2917 }
96ad2cc6
ED		 2918 case KVM_GET_LAPIC: {
2919 struct kvm_lapic_state lapic;
2920
2921 memset(&lapic, 0, sizeof lapic);
2922 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
2923 if (r)
2924 goto out;
2925 r = -EFAULT;
2926 if (copy_to_user(argp, &lapic, sizeof lapic))
2927 goto out;
2928 r = 0;
2929 break;
2930 }
2931 case KVM_SET_LAPIC: {
2932 struct kvm_lapic_state lapic;
2933
2934 r = -EFAULT;
2935 if (copy_from_user(&lapic, argp, sizeof lapic))
2936 goto out;
2937 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
2938 if (r)
2939 goto out;
2940 r = 0;
2941 break;
2942 }
bccf2150
AK		 2943 default:
2944 ;
2945 }
2946out:
2947 return r;
2948}
2949
2950static long kvm_vm_ioctl(struct file *filp,
2951 unsigned int ioctl, unsigned long arg)
2952{
2953 struct kvm *kvm = filp->private_data;
2954 void __user *argp = (void __user *)arg;
2955 int r = -EINVAL;
2956
2957 switch (ioctl) {
2958 case KVM_CREATE_VCPU:
2959 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2960 if (r < 0)
2961 goto out;
2962 break;
6aa8b732
AK		 2963 case KVM_SET_MEMORY_REGION: {
2964 struct kvm_memory_region kvm_mem;
2965
2966 r = -EFAULT;
2f366987 2967 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 2968 goto out;
2c6f5df9 2969 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
6aa8b732
AK		 2970 if (r)
2971 goto out;
2972 break;
2973 }
2974 case KVM_GET_DIRTY_LOG: {
2975 struct kvm_dirty_log log;
2976
2977 r = -EFAULT;
2f366987 2978 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 2979 goto out;
2c6f5df9 2980 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 2981 if (r)
2982 goto out;
2983 break;
2984 }
e8207547
AK		 2985 case KVM_SET_MEMORY_ALIAS: {
2986 struct kvm_memory_alias alias;
2987
2988 r = -EFAULT;
2989 if (copy_from_user(&alias, argp, sizeof alias))
2990 goto out;
2991 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
2992 if (r)
2993 goto out;
2994 break;
2995 }
85f455f7
ED		 2996 case KVM_CREATE_IRQCHIP:
2997 r = -ENOMEM;
2998 kvm->vpic = kvm_create_pic(kvm);
1fd4f2a5
ED		 2999 if (kvm->vpic) {
3000 r = kvm_ioapic_init(kvm);
3001 if (r) {
3002 kfree(kvm->vpic);
3003 kvm->vpic = NULL;
3004 goto out;
3005 }
3006 }
85f455f7
ED		 3007 else
3008 goto out;
3009 break;
3010 case KVM_IRQ_LINE: {
3011 struct kvm_irq_level irq_event;
3012
3013 r = -EFAULT;
3014 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3015 goto out;
3016 if (irqchip_in_kernel(kvm)) {
9cf98828 3017 mutex_lock(&kvm->lock);
85f455f7
ED		 3018 if (irq_event.irq < 16)
3019 kvm_pic_set_irq(pic_irqchip(kvm),
3020 irq_event.irq,
3021 irq_event.level);
1fd4f2a5
ED		 3022 kvm_ioapic_set_irq(kvm->vioapic,
3023 irq_event.irq,
3024 irq_event.level);
9cf98828 3025 mutex_unlock(&kvm->lock);
85f455f7
ED		 3026 r = 0;
3027 }
3028 break;
3029 }
6ceb9d79
HQ		 3030 case KVM_GET_IRQCHIP: {
3031 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3032 struct kvm_irqchip chip;
3033
3034 r = -EFAULT;
3035 if (copy_from_user(&chip, argp, sizeof chip))
3036 goto out;
3037 r = -ENXIO;
3038 if (!irqchip_in_kernel(kvm))
3039 goto out;
3040 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
3041 if (r)
3042 goto out;
3043 r = -EFAULT;
3044 if (copy_to_user(argp, &chip, sizeof chip))
3045 goto out;
3046 r = 0;
3047 break;
3048 }
3049 case KVM_SET_IRQCHIP: {
3050 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3051 struct kvm_irqchip chip;
3052
3053 r = -EFAULT;
3054 if (copy_from_user(&chip, argp, sizeof chip))
3055 goto out;
3056 r = -ENXIO;
3057 if (!irqchip_in_kernel(kvm))
3058 goto out;
3059 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
3060 if (r)
3061 goto out;
3062 r = 0;
3063 break;
3064 }
f17abe9a
AK		 3065 default:
3066 ;
3067 }
3068out:
3069 return r;
3070}
3071
3072static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3073 unsigned long address,
3074 int *type)
3075{
3076 struct kvm *kvm = vma->vm_file->private_data;
3077 unsigned long pgoff;
f17abe9a
AK		 3078 struct page *page;
3079
f17abe9a 3080 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
954bbbc2 3081 page = gfn_to_page(kvm, pgoff);
f17abe9a
AK		 3082 if (!page)
3083 return NOPAGE_SIGBUS;
3084 get_page(page);
cd0d9137
NAQ		 3085 if (type != NULL)
3086 *type = VM_FAULT_MINOR;
3087
f17abe9a
AK		 3088 return page;
3089}
3090
3091static struct vm_operations_struct kvm_vm_vm_ops = {
3092 .nopage = kvm_vm_nopage,
3093};
3094
3095static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3096{
3097 vma->vm_ops = &kvm_vm_vm_ops;
3098 return 0;
3099}
3100
3101static struct file_operations kvm_vm_fops = {
3102 .release = kvm_vm_release,
3103 .unlocked_ioctl = kvm_vm_ioctl,
3104 .compat_ioctl = kvm_vm_ioctl,
3105 .mmap = kvm_vm_mmap,
3106};
3107
3108static int kvm_dev_ioctl_create_vm(void)
3109{
3110 int fd, r;
3111 struct inode *inode;
3112 struct file *file;
3113 struct kvm *kvm;
3114
f17abe9a 3115 kvm = kvm_create_vm();
d6d28168
AK		 3116 if (IS_ERR(kvm))
3117 return PTR_ERR(kvm);
3118 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3119 if (r) {
3120 kvm_destroy_vm(kvm);
3121 return r;
f17abe9a
AK		 3122 }
3123
bccf2150 3124 kvm->filp = file;
f17abe9a 3125
f17abe9a 3126 return fd;
f17abe9a
AK		 3127}
3128
3129static long kvm_dev_ioctl(struct file *filp,
3130 unsigned int ioctl, unsigned long arg)
3131{
3132 void __user *argp = (void __user *)arg;
07c45a36 3133 long r = -EINVAL;
f17abe9a
AK		 3134
3135 switch (ioctl) {
3136 case KVM_GET_API_VERSION:
f0fe5108
AK		 3137 r = -EINVAL;
3138 if (arg)
3139 goto out;
f17abe9a
AK		 3140 r = KVM_API_VERSION;
3141 break;
3142 case KVM_CREATE_VM:
f0fe5108
AK		 3143 r = -EINVAL;
3144 if (arg)
3145 goto out;
f17abe9a
AK		 3146 r = kvm_dev_ioctl_create_vm();
3147 break;
6aa8b732 3148 case KVM_GET_MSR_INDEX_LIST: {
2f366987 3149 struct kvm_msr_list __user *user_msr_list = argp;
6aa8b732
AK		 3150 struct kvm_msr_list msr_list;
3151 unsigned n;
3152
3153 r = -EFAULT;
3154 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
3155 goto out;
3156 n = msr_list.nmsrs;
6f00e68f 3157 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
6aa8b732
AK		 3158 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
3159 goto out;
3160 r = -E2BIG;
bf591b24 3161 if (n < num_msrs_to_save)
6aa8b732
AK		 3162 goto out;
3163 r = -EFAULT;
3164 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
bf591b24 3165 num_msrs_to_save * sizeof(u32)))
6aa8b732 3166 goto out;
6f00e68f
AK		 3167 if (copy_to_user(user_msr_list->indices
3168 + num_msrs_to_save * sizeof(u32),
3169 &emulated_msrs,
3170 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
3171 goto out;
6aa8b732 3172 r = 0;
cc1d8955 3173 break;
6aa8b732 3174 }
85f455f7
ED		 3175 case KVM_CHECK_EXTENSION: {
3176 int ext = (long)argp;
3177
3178 switch (ext) {
3179 case KVM_CAP_IRQCHIP:
b6958ce4 3180 case KVM_CAP_HLT:
85f455f7
ED		 3181 r = 1;
3182 break;
3183 default:
3184 r = 0;
3185 break;
3186 }
5d308f45 3187 break;
85f455f7 3188 }
07c45a36
AK		 3189 case KVM_GET_VCPU_MMAP_SIZE:
3190 r = -EINVAL;
3191 if (arg)
3192 goto out;
039576c0 3193 r = 2 * PAGE_SIZE;
07c45a36 3194 break;
6aa8b732
AK		 3195 default:
3196 ;
3197 }
3198out:
3199 return r;
3200}
3201
6aa8b732 3202static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 3203 .unlocked_ioctl = kvm_dev_ioctl,
3204 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 3205};
3206
3207static struct miscdevice kvm_dev = {
bbe4432e 3208 KVM_MINOR,
6aa8b732
AK		 3209 "kvm",
3210 &kvm_chardev_ops,
3211};
3212
774c47f1
AK		 3213/*
3214 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3215 * cached on it.
3216 */
3217static void decache_vcpus_on_cpu(int cpu)
3218{
3219 struct kvm *vm;
3220 struct kvm_vcpu *vcpu;
3221 int i;
3222
3223 spin_lock(&kvm_lock);
11ec2804 3224 list_for_each_entry(vm, &vm_list, vm_list)
774c47f1 3225 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3226 vcpu = vm->vcpus[i];
3227 if (!vcpu)
3228 continue;
774c47f1
AK		 3229 /*
3230 * If the vcpu is locked, then it is running on some
3231 * other cpu and therefore it is not cached on the
3232 * cpu in question.
3233 *
3234 * If it's not locked, check the last cpu it executed
3235 * on.
3236 */
3237 if (mutex_trylock(&vcpu->mutex)) {
3238 if (vcpu->cpu == cpu) {
cbdd1bea 3239 kvm_x86_ops->vcpu_decache(vcpu);
774c47f1
AK		 3240 vcpu->cpu = -1;
3241 }
3242 mutex_unlock(&vcpu->mutex);
3243 }
3244 }
3245 spin_unlock(&kvm_lock);
3246}
3247
1b6c0168
AK		 3248static void hardware_enable(void *junk)
3249{
3250 int cpu = raw_smp_processor_id();
3251
3252 if (cpu_isset(cpu, cpus_hardware_enabled))
3253 return;
3254 cpu_set(cpu, cpus_hardware_enabled);
cbdd1bea 3255 kvm_x86_ops->hardware_enable(NULL);
1b6c0168
AK		 3256}
3257
3258static void hardware_disable(void *junk)
3259{
3260 int cpu = raw_smp_processor_id();
3261
3262 if (!cpu_isset(cpu, cpus_hardware_enabled))
3263 return;
3264 cpu_clear(cpu, cpus_hardware_enabled);
3265 decache_vcpus_on_cpu(cpu);
cbdd1bea 3266 kvm_x86_ops->hardware_disable(NULL);
1b6c0168
AK		 3267}
3268
774c47f1
AK		 3269static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3270 void *v)
3271{
3272 int cpu = (long)v;
3273
3274 switch (val) {
cec9ad27
AK		 3275 case CPU_DYING:
3276 case CPU_DYING_FROZEN:
6ec8a856
AK		 3277 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3278 cpu);
3279 hardware_disable(NULL);
3280 break;
774c47f1 3281 case CPU_UP_CANCELED:
8bb78442 3282 case CPU_UP_CANCELED_FROZEN:
43934a38
JK		 3283 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3284 cpu);
1b6c0168 3285 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
774c47f1 3286 break;
43934a38 3287 case CPU_ONLINE:
8bb78442 3288 case CPU_ONLINE_FROZEN:
43934a38
JK		 3289 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3290 cpu);
1b6c0168 3291 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
774c47f1
AK		 3292 break;
3293 }
3294 return NOTIFY_OK;
3295}
3296
9a2b85c6
RR		 3297static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
3298 void *v)
3299{
3300 if (val == SYS_RESTART) {
3301 /*
3302 * Some (well, at least mine) BIOSes hang on reboot if
3303 * in vmx root mode.
3304 */
3305 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3306 on_each_cpu(hardware_disable, NULL, 0, 1);
3307 }
3308 return NOTIFY_OK;
3309}
3310
3311static struct notifier_block kvm_reboot_notifier = {
3312 .notifier_call = kvm_reboot,
3313 .priority = 0,
3314};
3315
2eeb2e94
GH		 3316void kvm_io_bus_init(struct kvm_io_bus *bus)
3317{
3318 memset(bus, 0, sizeof(*bus));
3319}
3320
3321void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3322{
3323 int i;
3324
3325 for (i = 0; i < bus->dev_count; i++) {
3326 struct kvm_io_device *pos = bus->devs[i];
3327
3328 kvm_iodevice_destructor(pos);
3329 }
3330}
3331
3332struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3333{
3334 int i;
3335
3336 for (i = 0; i < bus->dev_count; i++) {
3337 struct kvm_io_device *pos = bus->devs[i];
3338
3339 if (pos->in_range(pos, addr))
3340 return pos;
3341 }
3342
3343 return NULL;
3344}
3345
3346void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3347{
3348 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3349
3350 bus->devs[bus->dev_count++] = dev;
3351}
3352
774c47f1
AK		 3353static struct notifier_block kvm_cpu_notifier = {
3354 .notifier_call = kvm_cpu_hotplug,
3355 .priority = 20, /* must be > scheduler priority */
3356};
3357
1165f5fe
AK		 3358static u64 stat_get(void *_offset)
3359{
3360 unsigned offset = (long)_offset;
3361 u64 total = 0;
3362 struct kvm *kvm;
3363 struct kvm_vcpu *vcpu;
3364 int i;
3365
3366 spin_lock(&kvm_lock);
3367 list_for_each_entry(kvm, &vm_list, vm_list)
3368 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3369 vcpu = kvm->vcpus[i];
3370 if (vcpu)
3371 total += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 3372 }
3373 spin_unlock(&kvm_lock);
3374 return total;
3375}
3376
3dea7ca7 3377DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
1165f5fe 3378
6aa8b732
AK		 3379static __init void kvm_init_debug(void)
3380{
3381 struct kvm_stats_debugfs_item *p;
3382
8b6d44c7 3383 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 3384 for (p = debugfs_entries; p->name; ++p)
1165f5fe
AK		 3385 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3386 (void *)(long)p->offset,
3387 &stat_fops);
6aa8b732
AK		 3388}
3389
3390static void kvm_exit_debug(void)
3391{
3392 struct kvm_stats_debugfs_item *p;
3393
3394 for (p = debugfs_entries; p->name; ++p)
3395 debugfs_remove(p->dentry);
3396 debugfs_remove(debugfs_dir);
3397}
3398
59ae6c6b
AK		 3399static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3400{
4267c41a 3401 hardware_disable(NULL);
59ae6c6b
AK		 3402 return 0;
3403}
3404
3405static int kvm_resume(struct sys_device *dev)
3406{
4267c41a 3407 hardware_enable(NULL);
59ae6c6b
AK		 3408 return 0;
3409}
3410
3411static struct sysdev_class kvm_sysdev_class = {
af5ca3f4 3412 .name = "kvm",
59ae6c6b
AK		 3413 .suspend = kvm_suspend,
3414 .resume = kvm_resume,
3415};
3416
3417static struct sys_device kvm_sysdev = {
3418 .id = 0,
3419 .cls = &kvm_sysdev_class,
3420};
3421
6aa8b732
AK		 3422hpa_t bad_page_address;
3423
15ad7146
AK		 3424static inline
3425struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3426{
3427 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3428}
3429
3430static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3431{
3432 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3433
cbdd1bea 3434 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146
AK		 3435}
3436
3437static void kvm_sched_out(struct preempt_notifier *pn,
3438 struct task_struct *next)
3439{
3440 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3441
cbdd1bea 3442 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 3443}
3444
cbdd1bea 3445int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
c16f862d 3446 struct module *module)
6aa8b732
AK		 3447{
3448 int r;
002c7f7c 3449 int cpu;
6aa8b732 3450
cbdd1bea 3451 if (kvm_x86_ops) {
09db28b8
YI		 3452 printk(KERN_ERR "kvm: already loaded the other module\n");
3453 return -EEXIST;
3454 }
3455
e097f35c 3456 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 3457 printk(KERN_ERR "kvm: no hardware support\n");
3458 return -EOPNOTSUPP;
3459 }
e097f35c 3460 if (ops->disabled_by_bios()) {
6aa8b732
AK		 3461 printk(KERN_ERR "kvm: disabled by bios\n");
3462 return -EOPNOTSUPP;
3463 }
3464
cbdd1bea 3465 kvm_x86_ops = ops;
e097f35c 3466
cbdd1bea 3467 r = kvm_x86_ops->hardware_setup();
6aa8b732 3468 if (r < 0)
ca45aaae 3469 goto out;
6aa8b732 3470
002c7f7c
YS		 3471 for_each_online_cpu(cpu) {
3472 smp_call_function_single(cpu,
cbdd1bea 3473 kvm_x86_ops->check_processor_compatibility,
002c7f7c
YS		 3474 &r, 0, 1);
3475 if (r < 0)
3476 goto out_free_0;
3477 }
3478
1b6c0168 3479 on_each_cpu(hardware_enable, NULL, 0, 1);
774c47f1
AK		 3480 r = register_cpu_notifier(&kvm_cpu_notifier);
3481 if (r)
3482 goto out_free_1;
6aa8b732
AK		 3483 register_reboot_notifier(&kvm_reboot_notifier);
3484
59ae6c6b
AK		 3485 r = sysdev_class_register(&kvm_sysdev_class);
3486 if (r)
3487 goto out_free_2;
3488
3489 r = sysdev_register(&kvm_sysdev);
3490 if (r)
3491 goto out_free_3;
3492
c16f862d
RR		 3493 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3494 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3495 __alignof__(struct kvm_vcpu), 0, 0);
3496 if (!kvm_vcpu_cache) {
3497 r = -ENOMEM;
3498 goto out_free_4;
3499 }
3500
6aa8b732
AK		 3501 kvm_chardev_ops.owner = module;
3502
3503 r = misc_register(&kvm_dev);
3504 if (r) {
3505 printk (KERN_ERR "kvm: misc device register failed\n");
3506 goto out_free;
3507 }
3508
15ad7146
AK		 3509 kvm_preempt_ops.sched_in = kvm_sched_in;
3510 kvm_preempt_ops.sched_out = kvm_sched_out;
3511
c7addb90
AK		 3512 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
3513
3514 return 0;
6aa8b732
AK		 3515
3516out_free:
c16f862d
RR		 3517 kmem_cache_destroy(kvm_vcpu_cache);
3518out_free_4:
59ae6c6b
AK		 3519 sysdev_unregister(&kvm_sysdev);
3520out_free_3:
3521 sysdev_class_unregister(&kvm_sysdev_class);
3522out_free_2:
6aa8b732 3523 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 3524 unregister_cpu_notifier(&kvm_cpu_notifier);
3525out_free_1:
1b6c0168 3526 on_each_cpu(hardware_disable, NULL, 0, 1);
002c7f7c 3527out_free_0:
cbdd1bea 3528 kvm_x86_ops->hardware_unsetup();
ca45aaae 3529out:
cbdd1bea 3530 kvm_x86_ops = NULL;
6aa8b732
AK		 3531 return r;
3532}
3533
cbdd1bea 3534void kvm_exit_x86(void)
6aa8b732
AK		 3535{
3536 misc_deregister(&kvm_dev);
c16f862d 3537 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 3538 sysdev_unregister(&kvm_sysdev);
3539 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 3540 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 3541 unregister_cpu_notifier(&kvm_cpu_notifier);
1b6c0168 3542 on_each_cpu(hardware_disable, NULL, 0, 1);
cbdd1bea
CE		 3543 kvm_x86_ops->hardware_unsetup();
3544 kvm_x86_ops = NULL;
6aa8b732
AK		 3545}
3546
3547static __init int kvm_init(void)
3548{
3549 static struct page *bad_page;
37e29d90
AK		 3550 int r;
3551
b5a33a75
AK		 3552 r = kvm_mmu_module_init();
3553 if (r)
3554 goto out4;
3555
6aa8b732
AK		 3556 kvm_init_debug();
3557
bf591b24
MR		 3558 kvm_init_msr_list();
3559
6aa8b732
AK		 3560 if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
3561 r = -ENOMEM;
3562 goto out;
3563 }
3564
3565 bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
3566 memset(__va(bad_page_address), 0, PAGE_SIZE);
3567
58e690e6 3568 return 0;
6aa8b732
AK		 3569
3570out:
3571 kvm_exit_debug();
b5a33a75
AK		 3572 kvm_mmu_module_exit();
3573out4:
6aa8b732
AK		 3574 return r;
3575}
3576
3577static __exit void kvm_exit(void)
3578{
3579 kvm_exit_debug();
3580 __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
b5a33a75 3581 kvm_mmu_module_exit();
6aa8b732
AK		 3582}
3583
3584module_init(kvm_init)
3585module_exit(kvm_exit)
3586
cbdd1bea
CE		 3587EXPORT_SYMBOL_GPL(kvm_init_x86);
3588EXPORT_SYMBOL_GPL(kvm_exit_x86);
Linux kernel - Deliverables
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