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KVM: x86 emulator: Add vmmcall/vmcall to x86_emulate (v3)
[net-next-2.6.git] / drivers / kvm / kvm_main.c
CommitLineData
6aa8b732
AK		 1/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 *
9 * Authors:
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
12 *
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
15 *
16 */
17
18#include "kvm.h"
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>
6aa8b732 42
e495606d
AK		 43#include <asm/processor.h>
44#include <asm/msr.h>
45#include <asm/io.h>
46#include <asm/uaccess.h>
47#include <asm/desc.h>
6aa8b732
AK		 48
49MODULE_AUTHOR("Qumranet");
50MODULE_LICENSE("GPL");
51
133de902
AK		 52static DEFINE_SPINLOCK(kvm_lock);
53static LIST_HEAD(vm_list);
54
1b6c0168
AK		 55static cpumask_t cpus_hardware_enabled;
56
cbdd1bea 57struct kvm_x86_ops *kvm_x86_ops;
c16f862d
RR		 58struct kmem_cache *kvm_vcpu_cache;
59EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 60
15ad7146
AK		 61static __read_mostly struct preempt_ops kvm_preempt_ops;
62
1165f5fe 63#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
6aa8b732
AK		 64
65static struct kvm_stats_debugfs_item {
66 const char *name;
1165f5fe 67 int offset;
6aa8b732
AK		 68 struct dentry *dentry;
69} debugfs_entries[] = {
1165f5fe
AK		 70 { "pf_fixed", STAT_OFFSET(pf_fixed) },
71 { "pf_guest", STAT_OFFSET(pf_guest) },
72 { "tlb_flush", STAT_OFFSET(tlb_flush) },
73 { "invlpg", STAT_OFFSET(invlpg) },
74 { "exits", STAT_OFFSET(exits) },
75 { "io_exits", STAT_OFFSET(io_exits) },
76 { "mmio_exits", STAT_OFFSET(mmio_exits) },
77 { "signal_exits", STAT_OFFSET(signal_exits) },
78 { "irq_window", STAT_OFFSET(irq_window_exits) },
79 { "halt_exits", STAT_OFFSET(halt_exits) },
b6958ce4 80 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
1165f5fe
AK		 81 { "request_irq", STAT_OFFSET(request_irq_exits) },
82 { "irq_exits", STAT_OFFSET(irq_exits) },
e6adf283 83 { "light_exits", STAT_OFFSET(light_exits) },
2cc51560 84 { "efer_reload", STAT_OFFSET(efer_reload) },
1165f5fe 85 { NULL }
6aa8b732
AK		 86};
87
88static struct dentry *debugfs_dir;
89
90#define MAX_IO_MSRS 256
91
707d92fa
RR		 92#define CR0_RESERVED_BITS \
93 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
94 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
95 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
66aee91a
RR		 96#define CR4_RESERVED_BITS \
97 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
98 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
99 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
100 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
101
7075bc81 102#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
6aa8b732
AK		 103#define EFER_RESERVED_BITS 0xfffffffffffff2fe
104
05b3e0c2 105#ifdef CONFIG_X86_64
6aa8b732
AK		 106// LDT or TSS descriptor in the GDT. 16 bytes.
107struct segment_descriptor_64 {
108 struct segment_descriptor s;
109 u32 base_higher;
110 u32 pad_zero;
111};
112
113#endif
114
bccf2150
AK		 115static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
116 unsigned long arg);
117
6aa8b732
AK		 118unsigned long segment_base(u16 selector)
119{
120 struct descriptor_table gdt;
121 struct segment_descriptor *d;
122 unsigned long table_base;
123 typedef unsigned long ul;
124 unsigned long v;
125
126 if (selector == 0)
127 return 0;
128
129 asm ("sgdt %0" : "=m"(gdt));
130 table_base = gdt.base;
131
132 if (selector & 4) { /* from ldt */
133 u16 ldt_selector;
134
135 asm ("sldt %0" : "=g"(ldt_selector));
136 table_base = segment_base(ldt_selector);
137 }
138 d = (struct segment_descriptor *)(table_base + (selector & ~7));
139 v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
05b3e0c2 140#ifdef CONFIG_X86_64
6aa8b732
AK		 141 if (d->system == 0
142 && (d->type == 2 || d->type == 9 || d->type == 11))
143 v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32;
144#endif
145 return v;
146}
147EXPORT_SYMBOL_GPL(segment_base);
148
5aacf0ca
JM		 149static inline int valid_vcpu(int n)
150{
151 return likely(n >= 0 && n < KVM_MAX_VCPUS);
152}
153
7702fd1f
AK		 154void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
155{
156 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
157 return;
158
159 vcpu->guest_fpu_loaded = 1;
b114b080
RR		 160 fx_save(&vcpu->host_fx_image);
161 fx_restore(&vcpu->guest_fx_image);
7702fd1f
AK		 162}
163EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
164
165void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
166{
167 if (!vcpu->guest_fpu_loaded)
168 return;
169
170 vcpu->guest_fpu_loaded = 0;
b114b080
RR		 171 fx_save(&vcpu->guest_fx_image);
172 fx_restore(&vcpu->host_fx_image);
7702fd1f
AK		 173}
174EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
175
bccf2150
AK		 176/*
177 * Switches to specified vcpu, until a matching vcpu_put()
178 */
179static void vcpu_load(struct kvm_vcpu *vcpu)
6aa8b732 180{
15ad7146
AK		 181 int cpu;
182
bccf2150 183 mutex_lock(&vcpu->mutex);
15ad7146
AK		 184 cpu = get_cpu();
185 preempt_notifier_register(&vcpu->preempt_notifier);
cbdd1bea 186 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146 187 put_cpu();
6aa8b732
AK		 188}
189
6aa8b732
AK		 190static void vcpu_put(struct kvm_vcpu *vcpu)
191{
15ad7146 192 preempt_disable();
cbdd1bea 193 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 194 preempt_notifier_unregister(&vcpu->preempt_notifier);
195 preempt_enable();
6aa8b732
AK		 196 mutex_unlock(&vcpu->mutex);
197}
198
d9e368d6
AK		 199static void ack_flush(void *_completed)
200{
d9e368d6
AK		 201}
202
203void kvm_flush_remote_tlbs(struct kvm *kvm)
204{
49d3bd7e 205 int i, cpu;
d9e368d6
AK		 206 cpumask_t cpus;
207 struct kvm_vcpu *vcpu;
d9e368d6 208
d9e368d6 209 cpus_clear(cpus);
fb3f0f51
RR		 210 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
211 vcpu = kvm->vcpus[i];
212 if (!vcpu)
213 continue;
d9e368d6
AK		 214 if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests))
215 continue;
216 cpu = vcpu->cpu;
217 if (cpu != -1 && cpu != raw_smp_processor_id())
49d3bd7e 218 cpu_set(cpu, cpus);
d9e368d6 219 }
49d3bd7e 220 smp_call_function_mask(cpus, ack_flush, NULL, 1);
d9e368d6
AK		 221}
222
fb3f0f51
RR		 223int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
224{
225 struct page *page;
226 int r;
227
228 mutex_init(&vcpu->mutex);
229 vcpu->cpu = -1;
230 vcpu->mmu.root_hpa = INVALID_PAGE;
231 vcpu->kvm = kvm;
232 vcpu->vcpu_id = id;
c5ec1534
HQ		 233 if (!irqchip_in_kernel(kvm) || id == 0)
234 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
235 else
236 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
b6958ce4 237 init_waitqueue_head(&vcpu->wq);
fb3f0f51
RR		 238
239 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
240 if (!page) {
241 r = -ENOMEM;
242 goto fail;
243 }
244 vcpu->run = page_address(page);
245
246 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
247 if (!page) {
248 r = -ENOMEM;
249 goto fail_free_run;
250 }
251 vcpu->pio_data = page_address(page);
252
fb3f0f51
RR		 253 r = kvm_mmu_create(vcpu);
254 if (r < 0)
255 goto fail_free_pio_data;
256
257 return 0;
258
259fail_free_pio_data:
260 free_page((unsigned long)vcpu->pio_data);
261fail_free_run:
262 free_page((unsigned long)vcpu->run);
263fail:
264 return -ENOMEM;
265}
266EXPORT_SYMBOL_GPL(kvm_vcpu_init);
267
268void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
269{
270 kvm_mmu_destroy(vcpu);
1b9778da
ED		 271 if (vcpu->apic)
272 hrtimer_cancel(&vcpu->apic->timer.dev);
97222cc8 273 kvm_free_apic(vcpu->apic);
fb3f0f51
RR		 274 free_page((unsigned long)vcpu->pio_data);
275 free_page((unsigned long)vcpu->run);
276}
277EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
278
f17abe9a 279static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 280{
281 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
6aa8b732
AK		 282
283 if (!kvm)
f17abe9a 284 return ERR_PTR(-ENOMEM);
6aa8b732 285
74906345 286 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 287 mutex_init(&kvm->lock);
6aa8b732 288 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2eeb2e94 289 kvm_io_bus_init(&kvm->mmio_bus);
5e58cfe4
RR		 290 spin_lock(&kvm_lock);
291 list_add(&kvm->vm_list, &vm_list);
292 spin_unlock(&kvm_lock);
f17abe9a
AK		 293 return kvm;
294}
295
6aa8b732
AK		 296/*
297 * Free any memory in @free but not in @dont.
298 */
299static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
300 struct kvm_memory_slot *dont)
301{
302 int i;
303
304 if (!dont || free->phys_mem != dont->phys_mem)
305 if (free->phys_mem) {
306 for (i = 0; i < free->npages; ++i)
55a54f79
AK		 307 if (free->phys_mem[i])
308 __free_page(free->phys_mem[i]);
6aa8b732
AK		 309 vfree(free->phys_mem);
310 }
311
312 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
313 vfree(free->dirty_bitmap);
314
8b6d44c7 315 free->phys_mem = NULL;
6aa8b732 316 free->npages = 0;
8b6d44c7 317 free->dirty_bitmap = NULL;
6aa8b732
AK		 318}
319
320static void kvm_free_physmem(struct kvm *kvm)
321{
322 int i;
323
324 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 325 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 326}
327
039576c0
AK		 328static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
329{
330 int i;
331
3077c451 332 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
039576c0
AK		 333 if (vcpu->pio.guest_pages[i]) {
334 __free_page(vcpu->pio.guest_pages[i]);
335 vcpu->pio.guest_pages[i] = NULL;
336 }
337}
338
7b53aa56
AK		 339static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
340{
7b53aa56
AK		 341 vcpu_load(vcpu);
342 kvm_mmu_unload(vcpu);
343 vcpu_put(vcpu);
344}
345
6aa8b732
AK		 346static void kvm_free_vcpus(struct kvm *kvm)
347{
348 unsigned int i;
349
7b53aa56
AK		 350 /*
351 * Unpin any mmu pages first.
352 */
353 for (i = 0; i < KVM_MAX_VCPUS; ++i)
fb3f0f51
RR		 354 if (kvm->vcpus[i])
355 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
356 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
357 if (kvm->vcpus[i]) {
cbdd1bea 358 kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
fb3f0f51
RR		 359 kvm->vcpus[i] = NULL;
360 }
361 }
362
6aa8b732
AK		 363}
364
f17abe9a
AK		 365static void kvm_destroy_vm(struct kvm *kvm)
366{
133de902
AK		 367 spin_lock(&kvm_lock);
368 list_del(&kvm->vm_list);
369 spin_unlock(&kvm_lock);
74906345 370 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 371 kvm_io_bus_destroy(&kvm->mmio_bus);
85f455f7 372 kfree(kvm->vpic);
1fd4f2a5 373 kfree(kvm->vioapic);
6aa8b732
AK		 374 kvm_free_vcpus(kvm);
375 kvm_free_physmem(kvm);
376 kfree(kvm);
f17abe9a
AK		 377}
378
379static int kvm_vm_release(struct inode *inode, struct file *filp)
380{
381 struct kvm *kvm = filp->private_data;
382
383 kvm_destroy_vm(kvm);
6aa8b732
AK		 384 return 0;
385}
386
387static void inject_gp(struct kvm_vcpu *vcpu)
388{
cbdd1bea 389 kvm_x86_ops->inject_gp(vcpu, 0);
6aa8b732
AK		 390}
391
1342d353
AK		 392/*
393 * Load the pae pdptrs. Return true is they are all valid.
394 */
395static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 396{
397 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 398 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732 399 int i;
6aa8b732 400 u64 *pdpt;
1342d353 401 int ret;
954bbbc2 402 struct page *page;
c820c2aa 403 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
6aa8b732 404
11ec2804 405 mutex_lock(&vcpu->kvm->lock);
954bbbc2 406 page = gfn_to_page(vcpu->kvm, pdpt_gfn);
c820c2aa
RR		 407 if (!page) {
408 ret = 0;
409 goto out;
410 }
411
954bbbc2 412 pdpt = kmap_atomic(page, KM_USER0);
c820c2aa
RR		 413 memcpy(pdpte, pdpt+offset, sizeof(pdpte));
414 kunmap_atomic(pdpt, KM_USER0);
6aa8b732 415
c820c2aa
RR		 416 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
417 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
1342d353
AK		 418 ret = 0;
419 goto out;
420 }
6aa8b732 421 }
c820c2aa 422 ret = 1;
6aa8b732 423
c820c2aa 424 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
1342d353 425out:
11ec2804 426 mutex_unlock(&vcpu->kvm->lock);
6aa8b732 427
1342d353 428 return ret;
6aa8b732
AK		 429}
430
431void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
432{
707d92fa 433 if (cr0 & CR0_RESERVED_BITS) {
6aa8b732
AK		 434 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
435 cr0, vcpu->cr0);
436 inject_gp(vcpu);
437 return;
438 }
439
707d92fa 440 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
6aa8b732
AK		 441 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
442 inject_gp(vcpu);
443 return;
444 }
445
707d92fa 446 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
6aa8b732
AK		 447 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
448 "and a clear PE flag\n");
449 inject_gp(vcpu);
450 return;
451 }
452
707d92fa 453 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
05b3e0c2 454#ifdef CONFIG_X86_64
6aa8b732
AK		 455 if ((vcpu->shadow_efer & EFER_LME)) {
456 int cs_db, cs_l;
457
458 if (!is_pae(vcpu)) {
459 printk(KERN_DEBUG "set_cr0: #GP, start paging "
460 "in long mode while PAE is disabled\n");
461 inject_gp(vcpu);
462 return;
463 }
cbdd1bea 464 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
6aa8b732
AK		 465 if (cs_l) {
466 printk(KERN_DEBUG "set_cr0: #GP, start paging "
467 "in long mode while CS.L == 1\n");
468 inject_gp(vcpu);
469 return;
470
471 }
472 } else
473#endif
1342d353 474 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 475 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
476 "reserved bits\n");
477 inject_gp(vcpu);
478 return;
479 }
480
481 }
482
cbdd1bea 483 kvm_x86_ops->set_cr0(vcpu, cr0);
6aa8b732
AK		 484 vcpu->cr0 = cr0;
485
11ec2804 486 mutex_lock(&vcpu->kvm->lock);
6aa8b732 487 kvm_mmu_reset_context(vcpu);
11ec2804 488 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 489 return;
490}
491EXPORT_SYMBOL_GPL(set_cr0);
492
493void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
494{
495 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
496}
497EXPORT_SYMBOL_GPL(lmsw);
498
499void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
500{
66aee91a 501 if (cr4 & CR4_RESERVED_BITS) {
6aa8b732
AK		 502 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
503 inject_gp(vcpu);
504 return;
505 }
506
a9058ecd 507 if (is_long_mode(vcpu)) {
66aee91a 508 if (!(cr4 & X86_CR4_PAE)) {
6aa8b732
AK		 509 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
510 "in long mode\n");
511 inject_gp(vcpu);
512 return;
513 }
66aee91a 514 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
1342d353 515 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 516 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
517 inject_gp(vcpu);
310bc76c 518 return;
6aa8b732
AK		 519 }
520
66aee91a 521 if (cr4 & X86_CR4_VMXE) {
6aa8b732
AK		 522 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
523 inject_gp(vcpu);
524 return;
525 }
cbdd1bea 526 kvm_x86_ops->set_cr4(vcpu, cr4);
81f50e3b 527 vcpu->cr4 = cr4;
11ec2804 528 mutex_lock(&vcpu->kvm->lock);
6aa8b732 529 kvm_mmu_reset_context(vcpu);
11ec2804 530 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 531}
532EXPORT_SYMBOL_GPL(set_cr4);
533
534void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
535{
a9058ecd 536 if (is_long_mode(vcpu)) {
f802a307 537 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
6aa8b732
AK		 538 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
539 inject_gp(vcpu);
540 return;
541 }
542 } else {
f802a307
RR		 543 if (is_pae(vcpu)) {
544 if (cr3 & CR3_PAE_RESERVED_BITS) {
545 printk(KERN_DEBUG
546 "set_cr3: #GP, reserved bits\n");
547 inject_gp(vcpu);
548 return;
549 }
550 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
551 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
552 "reserved bits\n");
553 inject_gp(vcpu);
554 return;
555 }
556 } else {
557 if (cr3 & CR3_NONPAE_RESERVED_BITS) {
558 printk(KERN_DEBUG
559 "set_cr3: #GP, reserved bits\n");
560 inject_gp(vcpu);
561 return;
562 }
6aa8b732
AK		 563 }
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
AK		 723
724 memset(new.phys_mem, 0, npages * sizeof(struct page *));
725 for (i = 0; i < npages; ++i) {
726 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
727 | __GFP_ZERO);
728 if (!new.phys_mem[i])
0d8d2bd4 729 goto out_unlock;
5972e953 730 set_page_private(new.phys_mem[i],0);
6aa8b732
AK		 731 }
732 }
733
734 /* Allocate page dirty bitmap if needed */
735 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
736 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
737
738 new.dirty_bitmap = vmalloc(dirty_bytes);
739 if (!new.dirty_bitmap)
0d8d2bd4 740 goto out_unlock;
6aa8b732
AK		 741 memset(new.dirty_bitmap, 0, dirty_bytes);
742 }
743
6aa8b732
AK		 744 if (mem->slot >= kvm->nmemslots)
745 kvm->nmemslots = mem->slot + 1;
746
747 *memslot = new;
6aa8b732 748
90cb0529
AK		 749 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
750 kvm_flush_remote_tlbs(kvm);
6aa8b732 751
11ec2804 752 mutex_unlock(&kvm->lock);
6aa8b732
AK		 753
754 kvm_free_physmem_slot(&old, &new);
755 return 0;
756
757out_unlock:
11ec2804 758 mutex_unlock(&kvm->lock);
6aa8b732
AK		 759 kvm_free_physmem_slot(&new, &old);
760out:
761 return r;
762}
763
764/*
765 * Get (and clear) the dirty memory log for a memory slot.
766 */
2c6f5df9
AK		 767static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
768 struct kvm_dirty_log *log)
6aa8b732
AK		 769{
770 struct kvm_memory_slot *memslot;
771 int r, i;
772 int n;
773 unsigned long any = 0;
774
11ec2804 775 mutex_lock(&kvm->lock);
6aa8b732 776
6aa8b732
AK		 777 r = -EINVAL;
778 if (log->slot >= KVM_MEMORY_SLOTS)
779 goto out;
780
781 memslot = &kvm->memslots[log->slot];
782 r = -ENOENT;
783 if (!memslot->dirty_bitmap)
784 goto out;
785
cd1a4a98 786 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 787
cd1a4a98 788 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 789 any = memslot->dirty_bitmap[i];
790
791 r = -EFAULT;
792 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
793 goto out;
794
39214915
RR		 795 /* If nothing is dirty, don't bother messing with page tables. */
796 if (any) {
39214915
RR		 797 kvm_mmu_slot_remove_write_access(kvm, log->slot);
798 kvm_flush_remote_tlbs(kvm);
799 memset(memslot->dirty_bitmap, 0, n);
39214915 800 }
6aa8b732
AK		 801
802 r = 0;
803
804out:
11ec2804 805 mutex_unlock(&kvm->lock);
6aa8b732
AK		 806 return r;
807}
808
e8207547
AK		 809/*
810 * Set a new alias region. Aliases map a portion of physical memory into
811 * another portion. This is useful for memory windows, for example the PC
812 * VGA region.
813 */
814static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
815 struct kvm_memory_alias *alias)
816{
817 int r, n;
818 struct kvm_mem_alias *p;
819
820 r = -EINVAL;
821 /* General sanity checks */
822 if (alias->memory_size & (PAGE_SIZE - 1))
823 goto out;
824 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
825 goto out;
826 if (alias->slot >= KVM_ALIAS_SLOTS)
827 goto out;
828 if (alias->guest_phys_addr + alias->memory_size
829 < alias->guest_phys_addr)
830 goto out;
831 if (alias->target_phys_addr + alias->memory_size
832 < alias->target_phys_addr)
833 goto out;
834
11ec2804 835 mutex_lock(&kvm->lock);
e8207547
AK		 836
837 p = &kvm->aliases[alias->slot];
838 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
839 p->npages = alias->memory_size >> PAGE_SHIFT;
840 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
841
842 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
843 if (kvm->aliases[n - 1].npages)
844 break;
845 kvm->naliases = n;
846
90cb0529 847 kvm_mmu_zap_all(kvm);
e8207547 848
11ec2804 849 mutex_unlock(&kvm->lock);
e8207547
AK		 850
851 return 0;
852
853out:
854 return r;
855}
856
6ceb9d79
HQ		 857static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
858{
859 int r;
860
861 r = 0;
862 switch (chip->chip_id) {
863 case KVM_IRQCHIP_PIC_MASTER:
864 memcpy (&chip->chip.pic,
865 &pic_irqchip(kvm)->pics[0],
866 sizeof(struct kvm_pic_state));
867 break;
868 case KVM_IRQCHIP_PIC_SLAVE:
869 memcpy (&chip->chip.pic,
870 &pic_irqchip(kvm)->pics[1],
871 sizeof(struct kvm_pic_state));
872 break;
6bf9e962
HQ		 873 case KVM_IRQCHIP_IOAPIC:
874 memcpy (&chip->chip.ioapic,
875 ioapic_irqchip(kvm),
876 sizeof(struct kvm_ioapic_state));
877 break;
6ceb9d79
HQ		 878 default:
879 r = -EINVAL;
880 break;
881 }
882 return r;
883}
884
885static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
886{
887 int r;
888
889 r = 0;
890 switch (chip->chip_id) {
891 case KVM_IRQCHIP_PIC_MASTER:
892 memcpy (&pic_irqchip(kvm)->pics[0],
893 &chip->chip.pic,
894 sizeof(struct kvm_pic_state));
895 break;
896 case KVM_IRQCHIP_PIC_SLAVE:
897 memcpy (&pic_irqchip(kvm)->pics[1],
898 &chip->chip.pic,
899 sizeof(struct kvm_pic_state));
900 break;
6bf9e962
HQ		 901 case KVM_IRQCHIP_IOAPIC:
902 memcpy (ioapic_irqchip(kvm),
903 &chip->chip.ioapic,
904 sizeof(struct kvm_ioapic_state));
905 break;
6ceb9d79
HQ		 906 default:
907 r = -EINVAL;
908 break;
909 }
910 kvm_pic_update_irq(pic_irqchip(kvm));
911 return r;
912}
913
e8207547
AK		 914static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
915{
916 int i;
917 struct kvm_mem_alias *alias;
918
919 for (i = 0; i < kvm->naliases; ++i) {
920 alias = &kvm->aliases[i];
921 if (gfn >= alias->base_gfn
922 && gfn < alias->base_gfn + alias->npages)
923 return alias->target_gfn + gfn - alias->base_gfn;
924 }
925 return gfn;
926}
927
928static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 929{
930 int i;
931
932 for (i = 0; i < kvm->nmemslots; ++i) {
933 struct kvm_memory_slot *memslot = &kvm->memslots[i];
934
935 if (gfn >= memslot->base_gfn
936 && gfn < memslot->base_gfn + memslot->npages)
937 return memslot;
938 }
8b6d44c7 939 return NULL;
6aa8b732 940}
e8207547
AK		 941
942struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
943{
944 gfn = unalias_gfn(kvm, gfn);
945 return __gfn_to_memslot(kvm, gfn);
946}
6aa8b732 947
954bbbc2
AK		 948struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
949{
950 struct kvm_memory_slot *slot;
951
e8207547
AK		 952 gfn = unalias_gfn(kvm, gfn);
953 slot = __gfn_to_memslot(kvm, gfn);
954bbbc2
AK		 954 if (!slot)
955 return NULL;
956 return slot->phys_mem[gfn - slot->base_gfn];
957}
958EXPORT_SYMBOL_GPL(gfn_to_page);
959
7e9d619d 960/* WARNING: Does not work on aliased pages. */
6aa8b732
AK		 961void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
962{
31389947 963 struct kvm_memory_slot *memslot;
6aa8b732 964
7e9d619d
RR		 965 memslot = __gfn_to_memslot(kvm, gfn);
966 if (memslot && memslot->dirty_bitmap) {
967 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 968
7e9d619d
RR		 969 /* avoid RMW */
970 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
971 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 972 }
973}
974
e7d5d76c 975int emulator_read_std(unsigned long addr,
4c690a1e 976 void *val,
6aa8b732 977 unsigned int bytes,
cebff02b 978 struct kvm_vcpu *vcpu)
6aa8b732 979{
6aa8b732
AK		 980 void *data = val;
981
982 while (bytes) {
983 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
984 unsigned offset = addr & (PAGE_SIZE-1);
985 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
986 unsigned long pfn;
954bbbc2
AK		 987 struct page *page;
988 void *page_virt;
6aa8b732
AK		 989
990 if (gpa == UNMAPPED_GVA)
991 return X86EMUL_PROPAGATE_FAULT;
992 pfn = gpa >> PAGE_SHIFT;
954bbbc2
AK		 993 page = gfn_to_page(vcpu->kvm, pfn);
994 if (!page)
6aa8b732 995 return X86EMUL_UNHANDLEABLE;
954bbbc2 996 page_virt = kmap_atomic(page, KM_USER0);
6aa8b732 997
954bbbc2 998 memcpy(data, page_virt + offset, tocopy);
6aa8b732 999
954bbbc2 1000 kunmap_atomic(page_virt, KM_USER0);
6aa8b732
AK		 1001
1002 bytes -= tocopy;
1003 data += tocopy;
1004 addr += tocopy;
1005 }
1006
1007 return X86EMUL_CONTINUE;
1008}
e7d5d76c 1009EXPORT_SYMBOL_GPL(emulator_read_std);
6aa8b732
AK		 1010
1011static int emulator_write_std(unsigned long addr,
4c690a1e 1012 const void *val,
6aa8b732 1013 unsigned int bytes,
cebff02b 1014 struct kvm_vcpu *vcpu)
6aa8b732 1015{
f0242478 1016 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
6aa8b732
AK		 1017 return X86EMUL_UNHANDLEABLE;
1018}
1019
97222cc8
ED		 1020/*
1021 * Only apic need an MMIO device hook, so shortcut now..
1022 */
1023static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1024 gpa_t addr)
1025{
1026 struct kvm_io_device *dev;
1027
1028 if (vcpu->apic) {
1029 dev = &vcpu->apic->dev;
1030 if (dev->in_range(dev, addr))
1031 return dev;
1032 }
1033 return NULL;
1034}
1035
2eeb2e94
GH		 1036static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1037 gpa_t addr)
1038{
97222cc8
ED		 1039 struct kvm_io_device *dev;
1040
1041 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1042 if (dev == NULL)
1043 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1044 return dev;
2eeb2e94
GH		 1045}
1046
74906345
ED		 1047static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1048 gpa_t addr)
1049{
1050 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1051}
1052
6aa8b732 1053static int emulator_read_emulated(unsigned long addr,
4c690a1e 1054 void *val,
6aa8b732 1055 unsigned int bytes,
cebff02b 1056 struct kvm_vcpu *vcpu)
6aa8b732 1057{
2eeb2e94
GH		 1058 struct kvm_io_device *mmio_dev;
1059 gpa_t gpa;
6aa8b732
AK		 1060
1061 if (vcpu->mmio_read_completed) {
1062 memcpy(val, vcpu->mmio_data, bytes);
1063 vcpu->mmio_read_completed = 0;
1064 return X86EMUL_CONTINUE;
cebff02b 1065 } else if (emulator_read_std(addr, val, bytes, vcpu)
6aa8b732
AK		 1066 == X86EMUL_CONTINUE)
1067 return X86EMUL_CONTINUE;
d27d4aca 1068
2eeb2e94
GH		 1069 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1070 if (gpa == UNMAPPED_GVA)
1071 return X86EMUL_PROPAGATE_FAULT;
6aa8b732 1072
2eeb2e94
GH		 1073 /*
1074 * Is this MMIO handled locally?
1075 */
1076 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1077 if (mmio_dev) {
1078 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1079 return X86EMUL_CONTINUE;
6aa8b732 1080 }
2eeb2e94
GH		 1081
1082 vcpu->mmio_needed = 1;
1083 vcpu->mmio_phys_addr = gpa;
1084 vcpu->mmio_size = bytes;
1085 vcpu->mmio_is_write = 0;
1086
1087 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1088}
1089
da4a00f0 1090static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
4c690a1e 1091 const void *val, int bytes)
da4a00f0 1092{
da4a00f0
AK		 1093 struct page *page;
1094 void *virt;
1095
1096 if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
1097 return 0;
954bbbc2
AK		 1098 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1099 if (!page)
da4a00f0 1100 return 0;
ab51a434 1101 mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
da4a00f0 1102 virt = kmap_atomic(page, KM_USER0);
fe551881 1103 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
7cfa4b0a 1104 memcpy(virt + offset_in_page(gpa), val, bytes);
da4a00f0 1105 kunmap_atomic(virt, KM_USER0);
da4a00f0
AK		 1106 return 1;
1107}
1108
b0fcd903
AK		 1109static int emulator_write_emulated_onepage(unsigned long addr,
1110 const void *val,
1111 unsigned int bytes,
cebff02b 1112 struct kvm_vcpu *vcpu)
6aa8b732 1113{
2eeb2e94
GH		 1114 struct kvm_io_device *mmio_dev;
1115 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
6aa8b732 1116
c9047f53 1117 if (gpa == UNMAPPED_GVA) {
cbdd1bea 1118 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
6aa8b732 1119 return X86EMUL_PROPAGATE_FAULT;
c9047f53 1120 }
6aa8b732 1121
da4a00f0
AK		 1122 if (emulator_write_phys(vcpu, gpa, val, bytes))
1123 return X86EMUL_CONTINUE;
1124
2eeb2e94
GH		 1125 /*
1126 * Is this MMIO handled locally?
1127 */
1128 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1129 if (mmio_dev) {
1130 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1131 return X86EMUL_CONTINUE;
1132 }
1133
6aa8b732
AK		 1134 vcpu->mmio_needed = 1;
1135 vcpu->mmio_phys_addr = gpa;
1136 vcpu->mmio_size = bytes;
1137 vcpu->mmio_is_write = 1;
4c690a1e 1138 memcpy(vcpu->mmio_data, val, bytes);
6aa8b732
AK		 1139
1140 return X86EMUL_CONTINUE;
1141}
1142
e7d5d76c 1143int emulator_write_emulated(unsigned long addr,
b0fcd903
AK		 1144 const void *val,
1145 unsigned int bytes,
cebff02b 1146 struct kvm_vcpu *vcpu)
b0fcd903
AK		 1147{
1148 /* Crossing a page boundary? */
1149 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1150 int rc, now;
1151
1152 now = -addr & ~PAGE_MASK;
cebff02b 1153 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
b0fcd903
AK		 1154 if (rc != X86EMUL_CONTINUE)
1155 return rc;
1156 addr += now;
1157 val += now;
1158 bytes -= now;
1159 }
cebff02b 1160 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
b0fcd903 1161}
e7d5d76c 1162EXPORT_SYMBOL_GPL(emulator_write_emulated);
b0fcd903 1163
6aa8b732 1164static int emulator_cmpxchg_emulated(unsigned long addr,
4c690a1e
AK		 1165 const void *old,
1166 const void *new,
6aa8b732 1167 unsigned int bytes,
cebff02b 1168 struct kvm_vcpu *vcpu)
6aa8b732
AK		 1169{
1170 static int reported;
1171
1172 if (!reported) {
1173 reported = 1;
1174 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1175 }
cebff02b 1176 return emulator_write_emulated(addr, new, bytes, vcpu);
6aa8b732
AK		 1177}
1178
1179static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1180{
cbdd1bea 1181 return kvm_x86_ops->get_segment_base(vcpu, seg);
6aa8b732
AK		 1182}
1183
1184int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1185{
6aa8b732
AK		 1186 return X86EMUL_CONTINUE;
1187}
1188
1189int emulate_clts(struct kvm_vcpu *vcpu)
1190{
404fb881 1191 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
6aa8b732
AK		 1192 return X86EMUL_CONTINUE;
1193}
1194
1195int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
1196{
1197 struct kvm_vcpu *vcpu = ctxt->vcpu;
1198
1199 switch (dr) {
1200 case 0 ... 3:
cbdd1bea 1201 *dest = kvm_x86_ops->get_dr(vcpu, dr);
6aa8b732
AK		 1202 return X86EMUL_CONTINUE;
1203 default:
f0242478 1204 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
6aa8b732
AK		 1205 return X86EMUL_UNHANDLEABLE;
1206 }
1207}
1208
1209int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1210{
1211 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1212 int exception;
1213
cbdd1bea 1214 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
6aa8b732
AK		 1215 if (exception) {
1216 /* FIXME: better handling */
1217 return X86EMUL_UNHANDLEABLE;
1218 }
1219 return X86EMUL_CONTINUE;
1220}
1221
054b1369 1222void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
6aa8b732
AK		 1223{
1224 static int reported;
1225 u8 opcodes[4];
054b1369 1226 unsigned long rip = vcpu->rip;
6aa8b732
AK		 1227 unsigned long rip_linear;
1228
054b1369 1229 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
6aa8b732
AK		 1230
1231 if (reported)
1232 return;
1233
054b1369 1234 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
6aa8b732 1235
054b1369
AK		 1236 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1237 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
6aa8b732
AK		 1238 reported = 1;
1239}
054b1369 1240EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
6aa8b732
AK		 1241
1242struct x86_emulate_ops emulate_ops = {
1243 .read_std = emulator_read_std,
1244 .write_std = emulator_write_std,
1245 .read_emulated = emulator_read_emulated,
1246 .write_emulated = emulator_write_emulated,
1247 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1248};
1249
1250int emulate_instruction(struct kvm_vcpu *vcpu,
1251 struct kvm_run *run,
1252 unsigned long cr2,
1253 u16 error_code)
1254{
1255 struct x86_emulate_ctxt emulate_ctxt;
1256 int r;
1257 int cs_db, cs_l;
1258
e7df56e4 1259 vcpu->mmio_fault_cr2 = cr2;
cbdd1bea 1260 kvm_x86_ops->cache_regs(vcpu);
6aa8b732 1261
cbdd1bea 1262 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
6aa8b732
AK		 1263
1264 emulate_ctxt.vcpu = vcpu;
cbdd1bea 1265 emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1266 emulate_ctxt.cr2 = cr2;
1267 emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM)
1268 ? X86EMUL_MODE_REAL : cs_l
1269 ? X86EMUL_MODE_PROT64 : cs_db
1270 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1271
1272 if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1273 emulate_ctxt.cs_base = 0;
1274 emulate_ctxt.ds_base = 0;
1275 emulate_ctxt.es_base = 0;
1276 emulate_ctxt.ss_base = 0;
1277 } else {
1278 emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS);
1279 emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS);
1280 emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES);
1281 emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS);
1282 }
1283
1284 emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS);
1285 emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS);
1286
1287 vcpu->mmio_is_write = 0;
e70669ab 1288 vcpu->pio.string = 0;
6aa8b732 1289 r = x86_emulate_memop(&emulate_ctxt, &emulate_ops);
e70669ab
LV		 1290 if (vcpu->pio.string)
1291 return EMULATE_DO_MMIO;
6aa8b732
AK		 1292
1293 if ((r || vcpu->mmio_is_write) && run) {
8fc0d085 1294 run->exit_reason = KVM_EXIT_MMIO;
6aa8b732
AK		 1295 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1296 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1297 run->mmio.len = vcpu->mmio_size;
1298 run->mmio.is_write = vcpu->mmio_is_write;
1299 }
1300
1301 if (r) {
a436036b
AK		 1302 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1303 return EMULATE_DONE;
6aa8b732 1304 if (!vcpu->mmio_needed) {
054b1369 1305 kvm_report_emulation_failure(vcpu, "mmio");
6aa8b732
AK		 1306 return EMULATE_FAIL;
1307 }
1308 return EMULATE_DO_MMIO;
1309 }
1310
cbdd1bea
CE		 1311 kvm_x86_ops->decache_regs(vcpu);
1312 kvm_x86_ops->set_rflags(vcpu, emulate_ctxt.eflags);
6aa8b732 1313
02c83209
AK		 1314 if (vcpu->mmio_is_write) {
1315 vcpu->mmio_needed = 0;
6aa8b732 1316 return EMULATE_DO_MMIO;
02c83209 1317 }
6aa8b732
AK		 1318
1319 return EMULATE_DONE;
1320}
1321EXPORT_SYMBOL_GPL(emulate_instruction);
1322
b6958ce4
ED		 1323/*
1324 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1325 */
c5ec1534 1326static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
d3bef15f 1327{
b6958ce4
ED		 1328 DECLARE_WAITQUEUE(wait, current);
1329
1330 add_wait_queue(&vcpu->wq, &wait);
1331
1332 /*
1333 * We will block until either an interrupt or a signal wakes us up
1334 */
c5ec1534
HQ		 1335 while (!kvm_cpu_has_interrupt(vcpu)
1336 && !signal_pending(current)
1337 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
1338 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
b6958ce4
ED		 1339 set_current_state(TASK_INTERRUPTIBLE);
1340 vcpu_put(vcpu);
1341 schedule();
1342 vcpu_load(vcpu);
1343 }
d3bef15f 1344
c5ec1534 1345 __set_current_state(TASK_RUNNING);
b6958ce4 1346 remove_wait_queue(&vcpu->wq, &wait);
b6958ce4
ED		 1347}
1348
1349int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1350{
d3bef15f 1351 ++vcpu->stat.halt_exits;
b6958ce4 1352 if (irqchip_in_kernel(vcpu->kvm)) {
c5ec1534
HQ		 1353 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1354 kvm_vcpu_block(vcpu);
1355 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1356 return -EINTR;
b6958ce4
ED		 1357 return 1;
1358 } else {
1359 vcpu->run->exit_reason = KVM_EXIT_HLT;
1360 return 0;
1361 }
d3bef15f
AK		 1362}
1363EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1364
270fd9b9
AK		 1365int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
1366{
1367 unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
1368
cbdd1bea 1369 kvm_x86_ops->cache_regs(vcpu);
270fd9b9
AK		 1370 ret = -KVM_EINVAL;
1371#ifdef CONFIG_X86_64
1372 if (is_long_mode(vcpu)) {
1373 nr = vcpu->regs[VCPU_REGS_RAX];
1374 a0 = vcpu->regs[VCPU_REGS_RDI];
1375 a1 = vcpu->regs[VCPU_REGS_RSI];
1376 a2 = vcpu->regs[VCPU_REGS_RDX];
1377 a3 = vcpu->regs[VCPU_REGS_RCX];
1378 a4 = vcpu->regs[VCPU_REGS_R8];
1379 a5 = vcpu->regs[VCPU_REGS_R9];
1380 } else
1381#endif
1382 {
1383 nr = vcpu->regs[VCPU_REGS_RBX] & -1u;
1384 a0 = vcpu->regs[VCPU_REGS_RAX] & -1u;
1385 a1 = vcpu->regs[VCPU_REGS_RCX] & -1u;
1386 a2 = vcpu->regs[VCPU_REGS_RDX] & -1u;
1387 a3 = vcpu->regs[VCPU_REGS_RSI] & -1u;
1388 a4 = vcpu->regs[VCPU_REGS_RDI] & -1u;
1389 a5 = vcpu->regs[VCPU_REGS_RBP] & -1u;
1390 }
1391 switch (nr) {
1392 default:
519ef353 1393 run->hypercall.nr = nr;
b4e63f56
AK		 1394 run->hypercall.args[0] = a0;
1395 run->hypercall.args[1] = a1;
1396 run->hypercall.args[2] = a2;
1397 run->hypercall.args[3] = a3;
1398 run->hypercall.args[4] = a4;
1399 run->hypercall.args[5] = a5;
1400 run->hypercall.ret = ret;
1401 run->hypercall.longmode = is_long_mode(vcpu);
cbdd1bea 1402 kvm_x86_ops->decache_regs(vcpu);
b4e63f56 1403 return 0;
270fd9b9
AK		 1404 }
1405 vcpu->regs[VCPU_REGS_RAX] = ret;
cbdd1bea 1406 kvm_x86_ops->decache_regs(vcpu);
270fd9b9
AK		 1407 return 1;
1408}
1409EXPORT_SYMBOL_GPL(kvm_hypercall);
1410
6aa8b732
AK		 1411static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1412{
1413 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1414}
1415
1416void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1417{
1418 struct descriptor_table dt = { limit, base };
1419
cbdd1bea 1420 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 1421}
1422
1423void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1424{
1425 struct descriptor_table dt = { limit, base };
1426
cbdd1bea 1427 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 1428}
1429
1430void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1431 unsigned long *rflags)
1432{
1433 lmsw(vcpu, msw);
cbdd1bea 1434 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1435}
1436
1437unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1438{
cbdd1bea 1439 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 1440 switch (cr) {
1441 case 0:
1442 return vcpu->cr0;
1443 case 2:
1444 return vcpu->cr2;
1445 case 3:
1446 return vcpu->cr3;
1447 case 4:
1448 return vcpu->cr4;
1449 default:
1450 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1451 return 0;
1452 }
1453}
1454
1455void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1456 unsigned long *rflags)
1457{
1458 switch (cr) {
1459 case 0:
1460 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
cbdd1bea 1461 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1462 break;
1463 case 2:
1464 vcpu->cr2 = val;
1465 break;
1466 case 3:
1467 set_cr3(vcpu, val);
1468 break;
1469 case 4:
1470 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1471 break;
1472 default:
1473 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1474 }
1475}
1476
102d8325
IM		 1477/*
1478 * Register the para guest with the host:
1479 */
1480static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa)
1481{
1482 struct kvm_vcpu_para_state *para_state;
1483 hpa_t para_state_hpa, hypercall_hpa;
1484 struct page *para_state_page;
1485 unsigned char *hypercall;
1486 gpa_t hypercall_gpa;
1487
1488 printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n");
1489 printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa);
1490
1491 /*
1492 * Needs to be page aligned:
1493 */
1494 if (para_state_gpa != PAGE_ALIGN(para_state_gpa))
1495 goto err_gp;
1496
1497 para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa);
1498 printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa);
1499 if (is_error_hpa(para_state_hpa))
1500 goto err_gp;
1501
ab51a434 1502 mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT);
102d8325 1503 para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT);
fe551881 1504 para_state = kmap(para_state_page);
102d8325
IM		 1505
1506 printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version);
1507 printk(KERN_DEBUG ".... size: %d\n", para_state->size);
1508
1509 para_state->host_version = KVM_PARA_API_VERSION;
1510 /*
1511 * We cannot support guests that try to register themselves
1512 * with a newer API version than the host supports:
1513 */
1514 if (para_state->guest_version > KVM_PARA_API_VERSION) {
1515 para_state->ret = -KVM_EINVAL;
1516 goto err_kunmap_skip;
1517 }
1518
1519 hypercall_gpa = para_state->hypercall_gpa;
1520 hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa);
1521 printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa);
1522 if (is_error_hpa(hypercall_hpa)) {
1523 para_state->ret = -KVM_EINVAL;
1524 goto err_kunmap_skip;
1525 }
1526
1527 printk(KERN_DEBUG "kvm: para guest successfully registered.\n");
1528 vcpu->para_state_page = para_state_page;
1529 vcpu->para_state_gpa = para_state_gpa;
1530 vcpu->hypercall_gpa = hypercall_gpa;
1531
ab51a434 1532 mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT);
102d8325
IM		 1533 hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT),
1534 KM_USER1) + (hypercall_hpa & ~PAGE_MASK);
cbdd1bea 1535 kvm_x86_ops->patch_hypercall(vcpu, hypercall);
102d8325
IM		 1536 kunmap_atomic(hypercall, KM_USER1);
1537
1538 para_state->ret = 0;
1539err_kunmap_skip:
fe551881 1540 kunmap(para_state_page);
102d8325
IM		 1541 return 0;
1542err_gp:
1543 return 1;
1544}
1545
3bab1f5d
AK		 1546int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1547{
1548 u64 data;
1549
1550 switch (msr) {
1551 case 0xc0010010: /* SYSCFG */
1552 case 0xc0010015: /* HWCR */
1553 case MSR_IA32_PLATFORM_ID:
1554 case MSR_IA32_P5_MC_ADDR:
1555 case MSR_IA32_P5_MC_TYPE:
1556 case MSR_IA32_MC0_CTL:
1557 case MSR_IA32_MCG_STATUS:
1558 case MSR_IA32_MCG_CAP:
1559 case MSR_IA32_MC0_MISC:
1560 case MSR_IA32_MC0_MISC+4:
1561 case MSR_IA32_MC0_MISC+8:
1562 case MSR_IA32_MC0_MISC+12:
1563 case MSR_IA32_MC0_MISC+16:
1564 case MSR_IA32_UCODE_REV:
a8d13ea2 1565 case MSR_IA32_PERF_STATUS:
2dc7094b 1566 case MSR_IA32_EBL_CR_POWERON:
3bab1f5d
AK		 1567 /* MTRR registers */
1568 case 0xfe:
1569 case 0x200 ... 0x2ff:
1570 data = 0;
1571 break;
a8d13ea2
AK		 1572 case 0xcd: /* fsb frequency */
1573 data = 3;
1574 break;
3bab1f5d 1575 case MSR_IA32_APICBASE:
7017fc3d 1576 data = kvm_get_apic_base(vcpu);
3bab1f5d 1577 break;
6f00e68f
AK		 1578 case MSR_IA32_MISC_ENABLE:
1579 data = vcpu->ia32_misc_enable_msr;
1580 break;
3bab1f5d
AK		 1581#ifdef CONFIG_X86_64
1582 case MSR_EFER:
1583 data = vcpu->shadow_efer;
1584 break;
1585#endif
1586 default:
f0242478 1587 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
3bab1f5d
AK		 1588 return 1;
1589 }
1590 *pdata = data;
1591 return 0;
1592}
1593EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1594
6aa8b732
AK		 1595/*
1596 * Reads an msr value (of 'msr_index') into 'pdata'.
1597 * Returns 0 on success, non-0 otherwise.
1598 * Assumes vcpu_load() was already called.
1599 */
35f3f286 1600int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
6aa8b732 1601{
cbdd1bea 1602 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
6aa8b732
AK		 1603}
1604
05b3e0c2 1605#ifdef CONFIG_X86_64
6aa8b732 1606
3bab1f5d 1607static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1608{
6aa8b732
AK		 1609 if (efer & EFER_RESERVED_BITS) {
1610 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1611 efer);
1612 inject_gp(vcpu);
1613 return;
1614 }
1615
1616 if (is_paging(vcpu)
1617 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1618 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1619 inject_gp(vcpu);
1620 return;
1621 }
1622
cbdd1bea 1623 kvm_x86_ops->set_efer(vcpu, efer);
7725f0ba 1624
6aa8b732
AK		 1625 efer &= ~EFER_LMA;
1626 efer |= vcpu->shadow_efer & EFER_LMA;
1627
1628 vcpu->shadow_efer = efer;
6aa8b732 1629}
6aa8b732
AK		 1630
1631#endif
1632
3bab1f5d
AK		 1633int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1634{
1635 switch (msr) {
1636#ifdef CONFIG_X86_64
1637 case MSR_EFER:
1638 set_efer(vcpu, data);
1639 break;
1640#endif
1641 case MSR_IA32_MC0_STATUS:
f0242478 1642 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
3bab1f5d
AK		 1643 __FUNCTION__, data);
1644 break;
0e5bf0d0 1645 case MSR_IA32_MCG_STATUS:
f0242478 1646 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
0e5bf0d0
SK		 1647 __FUNCTION__, data);
1648 break;
3bab1f5d
AK		 1649 case MSR_IA32_UCODE_REV:
1650 case MSR_IA32_UCODE_WRITE:
1651 case 0x200 ... 0x2ff: /* MTRRs */
1652 break;
1653 case MSR_IA32_APICBASE:
7017fc3d 1654 kvm_set_apic_base(vcpu, data);
3bab1f5d 1655 break;
6f00e68f
AK		 1656 case MSR_IA32_MISC_ENABLE:
1657 vcpu->ia32_misc_enable_msr = data;
1658 break;
102d8325
IM		 1659 /*
1660 * This is the 'probe whether the host is KVM' logic:
1661 */
1662 case MSR_KVM_API_MAGIC:
1663 return vcpu_register_para(vcpu, data);
1664
3bab1f5d 1665 default:
f0242478 1666 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
3bab1f5d
AK		 1667 return 1;
1668 }
1669 return 0;
1670}
1671EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1672
6aa8b732
AK		 1673/*
1674 * Writes msr value into into the appropriate "register".
1675 * Returns 0 on success, non-0 otherwise.
1676 * Assumes vcpu_load() was already called.
1677 */
35f3f286 1678int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
6aa8b732 1679{
cbdd1bea 1680 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
6aa8b732
AK		 1681}
1682
1683void kvm_resched(struct kvm_vcpu *vcpu)
1684{
3fca0365
YD		 1685 if (!need_resched())
1686 return;
6aa8b732 1687 cond_resched();
6aa8b732
AK		 1688}
1689EXPORT_SYMBOL_GPL(kvm_resched);
1690
06465c5a
AK		 1691void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1692{
1693 int i;
1694 u32 function;
1695 struct kvm_cpuid_entry *e, *best;
1696
cbdd1bea 1697 kvm_x86_ops->cache_regs(vcpu);
06465c5a
AK		 1698 function = vcpu->regs[VCPU_REGS_RAX];
1699 vcpu->regs[VCPU_REGS_RAX] = 0;
1700 vcpu->regs[VCPU_REGS_RBX] = 0;
1701 vcpu->regs[VCPU_REGS_RCX] = 0;
1702 vcpu->regs[VCPU_REGS_RDX] = 0;
1703 best = NULL;
1704 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1705 e = &vcpu->cpuid_entries[i];
1706 if (e->function == function) {
1707 best = e;
1708 break;
1709 }
1710 /*
1711 * Both basic or both extended?
1712 */
1713 if (((e->function ^ function) & 0x80000000) == 0)
1714 if (!best || e->function > best->function)
1715 best = e;
1716 }
1717 if (best) {
1718 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1719 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1720 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1721 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1722 }
cbdd1bea
CE		 1723 kvm_x86_ops->decache_regs(vcpu);
1724 kvm_x86_ops->skip_emulated_instruction(vcpu);
06465c5a
AK		 1725}
1726EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1727
039576c0 1728static int pio_copy_data(struct kvm_vcpu *vcpu)
46fc1477 1729{
039576c0
AK		 1730 void *p = vcpu->pio_data;
1731 void *q;
1732 unsigned bytes;
1733 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1734
039576c0
AK		 1735 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1736 PAGE_KERNEL);
1737 if (!q) {
039576c0
AK		 1738 free_pio_guest_pages(vcpu);
1739 return -ENOMEM;
1740 }
1741 q += vcpu->pio.guest_page_offset;
1742 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1743 if (vcpu->pio.in)
1744 memcpy(q, p, bytes);
1745 else
1746 memcpy(p, q, bytes);
1747 q -= vcpu->pio.guest_page_offset;
1748 vunmap(q);
039576c0
AK		 1749 free_pio_guest_pages(vcpu);
1750 return 0;
1751}
1752
1753static int complete_pio(struct kvm_vcpu *vcpu)
1754{
1755 struct kvm_pio_request *io = &vcpu->pio;
46fc1477 1756 long delta;
039576c0 1757 int r;
46fc1477 1758
cbdd1bea 1759 kvm_x86_ops->cache_regs(vcpu);
46fc1477
AK		 1760
1761 if (!io->string) {
039576c0
AK		 1762 if (io->in)
1763 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
46fc1477
AK		 1764 io->size);
1765 } else {
039576c0
AK		 1766 if (io->in) {
1767 r = pio_copy_data(vcpu);
1768 if (r) {
cbdd1bea 1769 kvm_x86_ops->cache_regs(vcpu);
039576c0
AK		 1770 return r;
1771 }
1772 }
1773
46fc1477
AK		 1774 delta = 1;
1775 if (io->rep) {
039576c0 1776 delta *= io->cur_count;
46fc1477
AK		 1777 /*
1778 * The size of the register should really depend on
1779 * current address size.
1780 */
1781 vcpu->regs[VCPU_REGS_RCX] -= delta;
1782 }
039576c0 1783 if (io->down)
46fc1477
AK		 1784 delta = -delta;
1785 delta *= io->size;
039576c0 1786 if (io->in)
46fc1477
AK		 1787 vcpu->regs[VCPU_REGS_RDI] += delta;
1788 else
1789 vcpu->regs[VCPU_REGS_RSI] += delta;
1790 }
1791
cbdd1bea 1792 kvm_x86_ops->decache_regs(vcpu);
46fc1477 1793
039576c0
AK		 1794 io->count -= io->cur_count;
1795 io->cur_count = 0;
1796
039576c0 1797 return 0;
46fc1477
AK		 1798}
1799
65619eb5
ED		 1800static void kernel_pio(struct kvm_io_device *pio_dev,
1801 struct kvm_vcpu *vcpu,
1802 void *pd)
74906345
ED		 1803{
1804 /* TODO: String I/O for in kernel device */
1805
9cf98828 1806 mutex_lock(&vcpu->kvm->lock);
74906345
ED		 1807 if (vcpu->pio.in)
1808 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1809 vcpu->pio.size,
65619eb5 1810 pd);
74906345
ED		 1811 else
1812 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1813 vcpu->pio.size,
65619eb5 1814 pd);
9cf98828 1815 mutex_unlock(&vcpu->kvm->lock);
65619eb5
ED		 1816}
1817
1818static void pio_string_write(struct kvm_io_device *pio_dev,
1819 struct kvm_vcpu *vcpu)
1820{
1821 struct kvm_pio_request *io = &vcpu->pio;
1822 void *pd = vcpu->pio_data;
1823 int i;
1824
9cf98828 1825 mutex_lock(&vcpu->kvm->lock);
65619eb5
ED		 1826 for (i = 0; i < io->cur_count; i++) {
1827 kvm_iodevice_write(pio_dev, io->port,
1828 io->size,
1829 pd);
1830 pd += io->size;
1831 }
9cf98828 1832 mutex_unlock(&vcpu->kvm->lock);
74906345
ED		 1833}
1834
3090dd73
LV		 1835int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1836 int size, unsigned port)
1837{
1838 struct kvm_io_device *pio_dev;
1839
1840 vcpu->run->exit_reason = KVM_EXIT_IO;
1841 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1842 vcpu->run->io.size = vcpu->pio.size = size;
1843 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1844 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1845 vcpu->run->io.port = vcpu->pio.port = port;
1846 vcpu->pio.in = in;
1847 vcpu->pio.string = 0;
1848 vcpu->pio.down = 0;
1849 vcpu->pio.guest_page_offset = 0;
1850 vcpu->pio.rep = 0;
1851
cbdd1bea 1852 kvm_x86_ops->cache_regs(vcpu);
3090dd73 1853 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
cbdd1bea 1854 kvm_x86_ops->decache_regs(vcpu);
3090dd73 1855
0967b7bf
AK		 1856 kvm_x86_ops->skip_emulated_instruction(vcpu);
1857
3090dd73
LV		 1858 pio_dev = vcpu_find_pio_dev(vcpu, port);
1859 if (pio_dev) {
1860 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1861 complete_pio(vcpu);
1862 return 1;
1863 }
1864 return 0;
1865}
1866EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1867
1868int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1869 int size, unsigned long count, int down,
039576c0
AK		 1870 gva_t address, int rep, unsigned port)
1871{
1872 unsigned now, in_page;
65619eb5 1873 int i, ret = 0;
039576c0
AK		 1874 int nr_pages = 1;
1875 struct page *page;
74906345 1876 struct kvm_io_device *pio_dev;
039576c0
AK		 1877
1878 vcpu->run->exit_reason = KVM_EXIT_IO;
1879 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3090dd73 1880 vcpu->run->io.size = vcpu->pio.size = size;
039576c0 1881 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3090dd73
LV		 1882 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1883 vcpu->run->io.port = vcpu->pio.port = port;
039576c0 1884 vcpu->pio.in = in;
3090dd73 1885 vcpu->pio.string = 1;
039576c0
AK		 1886 vcpu->pio.down = down;
1887 vcpu->pio.guest_page_offset = offset_in_page(address);
1888 vcpu->pio.rep = rep;
1889
039576c0 1890 if (!count) {
cbdd1bea 1891 kvm_x86_ops->skip_emulated_instruction(vcpu);
039576c0
AK		 1892 return 1;
1893 }
1894
039576c0
AK		 1895 if (!down)
1896 in_page = PAGE_SIZE - offset_in_page(address);
1897 else
1898 in_page = offset_in_page(address) + size;
1899 now = min(count, (unsigned long)in_page / size);
1900 if (!now) {
1901 /*
1902 * String I/O straddles page boundary. Pin two guest pages
1903 * so that we satisfy atomicity constraints. Do just one
1904 * transaction to avoid complexity.
1905 */
1906 nr_pages = 2;
1907 now = 1;
1908 }
1909 if (down) {
1910 /*
1911 * String I/O in reverse. Yuck. Kill the guest, fix later.
1912 */
f0242478 1913 pr_unimpl(vcpu, "guest string pio down\n");
039576c0
AK		 1914 inject_gp(vcpu);
1915 return 1;
1916 }
1917 vcpu->run->io.count = now;
1918 vcpu->pio.cur_count = now;
1919
0967b7bf
AK		 1920 if (vcpu->pio.cur_count == vcpu->pio.count)
1921 kvm_x86_ops->skip_emulated_instruction(vcpu);
1922
039576c0 1923 for (i = 0; i < nr_pages; ++i) {
11ec2804 1924 mutex_lock(&vcpu->kvm->lock);
039576c0
AK		 1925 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1926 if (page)
1927 get_page(page);
1928 vcpu->pio.guest_pages[i] = page;
11ec2804 1929 mutex_unlock(&vcpu->kvm->lock);
039576c0
AK		 1930 if (!page) {
1931 inject_gp(vcpu);
1932 free_pio_guest_pages(vcpu);
1933 return 1;
1934 }
1935 }
1936
3090dd73 1937 pio_dev = vcpu_find_pio_dev(vcpu, port);
65619eb5
ED		 1938 if (!vcpu->pio.in) {
1939 /* string PIO write */
1940 ret = pio_copy_data(vcpu);
1941 if (ret >= 0 && pio_dev) {
1942 pio_string_write(pio_dev, vcpu);
1943 complete_pio(vcpu);
1944 if (vcpu->pio.count == 0)
1945 ret = 1;
1946 }
1947 } else if (pio_dev)
f0242478 1948 pr_unimpl(vcpu, "no string pio read support yet, "
65619eb5
ED		 1949 "port %x size %d count %ld\n",
1950 port, size, count);
1951
1952 return ret;
039576c0 1953}
3090dd73 1954EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
039576c0 1955
04d2cc77
AK		 1956/*
1957 * Check if userspace requested an interrupt window, and that the
1958 * interrupt window is open.
1959 *
1960 * No need to exit to userspace if we already have an interrupt queued.
1961 */
1962static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1963 struct kvm_run *kvm_run)
1964{
1965 return (!vcpu->irq_summary &&
1966 kvm_run->request_interrupt_window &&
1967 vcpu->interrupt_window_open &&
1968 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
1969}
1970
1971static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1972 struct kvm_run *kvm_run)
1973{
1974 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
1975 kvm_run->cr8 = get_cr8(vcpu);
1976 kvm_run->apic_base = kvm_get_apic_base(vcpu);
1977 if (irqchip_in_kernel(vcpu->kvm))
1978 kvm_run->ready_for_interrupt_injection = 1;
1979 else
1980 kvm_run->ready_for_interrupt_injection =
1981 (vcpu->interrupt_window_open &&
1982 vcpu->irq_summary == 0);
1983}
1984
1985static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1986{
1987 int r;
1988
1989 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
1990 printk("vcpu %d received sipi with vector # %x\n",
1991 vcpu->vcpu_id, vcpu->sipi_vector);
1992 kvm_lapic_reset(vcpu);
1993 kvm_x86_ops->vcpu_reset(vcpu);
1994 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
1995 }
1996
1997preempted:
1998 if (vcpu->guest_debug.enabled)
1999 kvm_x86_ops->guest_debug_pre(vcpu);
2000
2001again:
2002 r = kvm_mmu_reload(vcpu);
2003 if (unlikely(r))
2004 goto out;
2005
2006 preempt_disable();
2007
2008 kvm_x86_ops->prepare_guest_switch(vcpu);
2009 kvm_load_guest_fpu(vcpu);
2010
2011 local_irq_disable();
2012
2013 if (signal_pending(current)) {
2014 local_irq_enable();
2015 preempt_enable();
2016 r = -EINTR;
2017 kvm_run->exit_reason = KVM_EXIT_INTR;
2018 ++vcpu->stat.signal_exits;
2019 goto out;
2020 }
2021
2022 if (irqchip_in_kernel(vcpu->kvm))
2023 kvm_x86_ops->inject_pending_irq(vcpu);
2024 else if (!vcpu->mmio_read_completed)
2025 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2026
2027 vcpu->guest_mode = 1;
d172fcd3 2028 kvm_guest_enter();
04d2cc77
AK		 2029
2030 if (vcpu->requests)
2031 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
2032 kvm_x86_ops->tlb_flush(vcpu);
2033
2034 kvm_x86_ops->run(vcpu, kvm_run);
2035
2036 vcpu->guest_mode = 0;
2037 local_irq_enable();
2038
2039 ++vcpu->stat.exits;
2040
0552f73b
LV		 2041 /*
2042 * We must have an instruction between local_irq_enable() and
2043 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2044 * the interrupt shadow. The stat.exits increment will do nicely.
2045 * But we need to prevent reordering, hence this barrier():
2046 */
2047 barrier();
2048
2049 kvm_guest_exit();
2050
04d2cc77
AK		 2051 preempt_enable();
2052
2053 /*
2054 * Profile KVM exit RIPs:
2055 */
2056 if (unlikely(prof_on == KVM_PROFILING)) {
2057 kvm_x86_ops->cache_regs(vcpu);
2058 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2059 }
2060
2061 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2062
2063 if (r > 0) {
2064 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2065 r = -EINTR;
2066 kvm_run->exit_reason = KVM_EXIT_INTR;
2067 ++vcpu->stat.request_irq_exits;
2068 goto out;
2069 }
2070 if (!need_resched()) {
2071 ++vcpu->stat.light_exits;
2072 goto again;
2073 }
2074 }
2075
2076out:
2077 if (r > 0) {
2078 kvm_resched(vcpu);
2079 goto preempted;
2080 }
2081
2082 post_kvm_run_save(vcpu, kvm_run);
2083
2084 return r;
2085}
2086
2087
bccf2150 2088static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 2089{
6aa8b732 2090 int r;
1961d276 2091 sigset_t sigsaved;
6aa8b732 2092
bccf2150 2093 vcpu_load(vcpu);
6aa8b732 2094
c5ec1534
HQ		 2095 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2096 kvm_vcpu_block(vcpu);
2097 vcpu_put(vcpu);
2098 return -EAGAIN;
2099 }
2100
1961d276
AK		 2101 if (vcpu->sigset_active)
2102 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2103
54810342 2104 /* re-sync apic's tpr */
5cd4f6fd
HQ		 2105 if (!irqchip_in_kernel(vcpu->kvm))
2106 set_cr8(vcpu, kvm_run->cr8);
54810342 2107
02c83209
AK		 2108 if (vcpu->pio.cur_count) {
2109 r = complete_pio(vcpu);
2110 if (r)
2111 goto out;
2112 }
2113
2114 if (vcpu->mmio_needed) {
2115 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2116 vcpu->mmio_read_completed = 1;
2117 vcpu->mmio_needed = 0;
2118 r = emulate_instruction(vcpu, kvm_run,
2119 vcpu->mmio_fault_cr2, 0);
2120 if (r == EMULATE_DO_MMIO) {
2121 /*
2122 * Read-modify-write. Back to userspace.
2123 */
02c83209
AK		 2124 r = 0;
2125 goto out;
46fc1477 2126 }
6aa8b732
AK		 2127 }
2128
8eb7d334 2129 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
cbdd1bea 2130 kvm_x86_ops->cache_regs(vcpu);
b4e63f56 2131 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
cbdd1bea 2132 kvm_x86_ops->decache_regs(vcpu);
b4e63f56
AK		 2133 }
2134
04d2cc77 2135 r = __vcpu_run(vcpu, kvm_run);
6aa8b732 2136
039576c0 2137out:
1961d276
AK		 2138 if (vcpu->sigset_active)
2139 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2140
6aa8b732
AK		 2141 vcpu_put(vcpu);
2142 return r;
2143}
2144
bccf2150
AK		 2145static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2146 struct kvm_regs *regs)
6aa8b732 2147{
bccf2150 2148 vcpu_load(vcpu);
6aa8b732 2149
cbdd1bea 2150 kvm_x86_ops->cache_regs(vcpu);
6aa8b732
AK		 2151
2152 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2153 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2154 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2155 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2156 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2157 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2158 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2159 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 2160#ifdef CONFIG_X86_64
6aa8b732
AK		 2161 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2162 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2163 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2164 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2165 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2166 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2167 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2168 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2169#endif
2170
2171 regs->rip = vcpu->rip;
cbdd1bea 2172 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 2173
2174 /*
2175 * Don't leak debug flags in case they were set for guest debugging
2176 */
2177 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2178 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2179
2180 vcpu_put(vcpu);
2181
2182 return 0;
2183}
2184
bccf2150
AK		 2185static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2186 struct kvm_regs *regs)
6aa8b732 2187{
bccf2150 2188 vcpu_load(vcpu);
6aa8b732
AK		 2189
2190 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2191 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2192 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2193 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2194 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2195 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2196 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2197 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 2198#ifdef CONFIG_X86_64
6aa8b732
AK		 2199 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2200 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2201 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2202 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2203 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2204 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2205 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2206 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2207#endif
2208
2209 vcpu->rip = regs->rip;
cbdd1bea 2210 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
6aa8b732 2211
cbdd1bea 2212 kvm_x86_ops->decache_regs(vcpu);
6aa8b732
AK		 2213
2214 vcpu_put(vcpu);
2215
2216 return 0;
2217}
2218
2219static void get_segment(struct kvm_vcpu *vcpu,
2220 struct kvm_segment *var, int seg)
2221{
cbdd1bea 2222 return kvm_x86_ops->get_segment(vcpu, var, seg);
6aa8b732
AK		 2223}
2224
bccf2150
AK		 2225static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2226 struct kvm_sregs *sregs)
6aa8b732 2227{
6aa8b732 2228 struct descriptor_table dt;
2a8067f1 2229 int pending_vec;
6aa8b732 2230
bccf2150 2231 vcpu_load(vcpu);
6aa8b732
AK		 2232
2233 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2234 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2235 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2236 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2237 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2238 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2239
2240 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2241 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2242
cbdd1bea 2243 kvm_x86_ops->get_idt(vcpu, &dt);
6aa8b732
AK		 2244 sregs->idt.limit = dt.limit;
2245 sregs->idt.base = dt.base;
cbdd1bea 2246 kvm_x86_ops->get_gdt(vcpu, &dt);
6aa8b732
AK		 2247 sregs->gdt.limit = dt.limit;
2248 sregs->gdt.base = dt.base;
2249
cbdd1bea 2250 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 2251 sregs->cr0 = vcpu->cr0;
2252 sregs->cr2 = vcpu->cr2;
2253 sregs->cr3 = vcpu->cr3;
2254 sregs->cr4 = vcpu->cr4;
7017fc3d 2255 sregs->cr8 = get_cr8(vcpu);
6aa8b732 2256 sregs->efer = vcpu->shadow_efer;
7017fc3d 2257 sregs->apic_base = kvm_get_apic_base(vcpu);
6aa8b732 2258
2a8067f1 2259 if (irqchip_in_kernel(vcpu->kvm)) {
c52fb35a
HQ		 2260 memset(sregs->interrupt_bitmap, 0,
2261 sizeof sregs->interrupt_bitmap);
cbdd1bea 2262 pending_vec = kvm_x86_ops->get_irq(vcpu);
2a8067f1
ED		 2263 if (pending_vec >= 0)
2264 set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap);
2265 } else
c52fb35a
HQ		 2266 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2267 sizeof sregs->interrupt_bitmap);
6aa8b732
AK		 2268
2269 vcpu_put(vcpu);
2270
2271 return 0;
2272}
2273
2274static void set_segment(struct kvm_vcpu *vcpu,
2275 struct kvm_segment *var, int seg)
2276{
cbdd1bea 2277 return kvm_x86_ops->set_segment(vcpu, var, seg);
6aa8b732
AK		 2278}
2279
bccf2150
AK		 2280static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2281 struct kvm_sregs *sregs)
6aa8b732 2282{
6aa8b732 2283 int mmu_reset_needed = 0;
2a8067f1 2284 int i, pending_vec, max_bits;
6aa8b732
AK		 2285 struct descriptor_table dt;
2286
bccf2150 2287 vcpu_load(vcpu);
6aa8b732 2288
6aa8b732
AK		 2289 dt.limit = sregs->idt.limit;
2290 dt.base = sregs->idt.base;
cbdd1bea 2291 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 2292 dt.limit = sregs->gdt.limit;
2293 dt.base = sregs->gdt.base;
cbdd1bea 2294 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 2295
2296 vcpu->cr2 = sregs->cr2;
2297 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2298 vcpu->cr3 = sregs->cr3;
2299
7017fc3d 2300 set_cr8(vcpu, sregs->cr8);
6aa8b732
AK		 2301
2302 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 2303#ifdef CONFIG_X86_64
cbdd1bea 2304 kvm_x86_ops->set_efer(vcpu, sregs->efer);
6aa8b732 2305#endif
7017fc3d 2306 kvm_set_apic_base(vcpu, sregs->apic_base);
6aa8b732 2307
cbdd1bea 2308 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
399badf3 2309
6aa8b732 2310 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
81f50e3b 2311 vcpu->cr0 = sregs->cr0;
cbdd1bea 2312 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
6aa8b732
AK		 2313
2314 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
cbdd1bea 2315 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 2316 if (!is_long_mode(vcpu) && is_pae(vcpu))
2317 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 2318
2319 if (mmu_reset_needed)
2320 kvm_mmu_reset_context(vcpu);
2321
c52fb35a
HQ		 2322 if (!irqchip_in_kernel(vcpu->kvm)) {
2323 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2324 sizeof vcpu->irq_pending);
2325 vcpu->irq_summary = 0;
2326 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2327 if (vcpu->irq_pending[i])
2328 __set_bit(i, &vcpu->irq_summary);
2a8067f1
ED		 2329 } else {
2330 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2331 pending_vec = find_first_bit(
2332 (const unsigned long *)sregs->interrupt_bitmap,
2333 max_bits);
2334 /* Only pending external irq is handled here */
2335 if (pending_vec < max_bits) {
cbdd1bea 2336 kvm_x86_ops->set_irq(vcpu, pending_vec);
2a8067f1
ED		 2337 printk("Set back pending irq %d\n", pending_vec);
2338 }
c52fb35a 2339 }
6aa8b732 2340
024aa1c0
AK		 2341 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2342 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2343 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2344 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2345 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2346 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2347
2348 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2349 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2350
6aa8b732
AK		 2351 vcpu_put(vcpu);
2352
2353 return 0;
2354}
2355
1747fb71
RR		 2356void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2357{
2358 struct kvm_segment cs;
2359
2360 get_segment(vcpu, &cs, VCPU_SREG_CS);
2361 *db = cs.db;
2362 *l = cs.l;
2363}
2364EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2365
6aa8b732
AK		 2366/*
2367 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
2368 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
bf591b24
MR		 2369 *
2370 * This list is modified at module load time to reflect the
2371 * capabilities of the host cpu.
6aa8b732
AK		 2372 */
2373static u32 msrs_to_save[] = {
2374 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
2375 MSR_K6_STAR,
05b3e0c2 2376#ifdef CONFIG_X86_64
6aa8b732
AK		 2377 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
2378#endif
2379 MSR_IA32_TIME_STAMP_COUNTER,
2380};
2381
bf591b24
MR		 2382static unsigned num_msrs_to_save;
2383
6f00e68f
AK		 2384static u32 emulated_msrs[] = {
2385 MSR_IA32_MISC_ENABLE,
2386};
2387
bf591b24
MR		 2388static __init void kvm_init_msr_list(void)
2389{
2390 u32 dummy[2];
2391 unsigned i, j;
2392
2393 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
2394 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
2395 continue;
2396 if (j < i)
2397 msrs_to_save[j] = msrs_to_save[i];
2398 j++;
2399 }
2400 num_msrs_to_save = j;
2401}
6aa8b732
AK		 2402
2403/*
2404 * Adapt set_msr() to msr_io()'s calling convention
2405 */
2406static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
2407{
35f3f286 2408 return kvm_set_msr(vcpu, index, *data);
6aa8b732
AK		 2409}
2410
2411/*
2412 * Read or write a bunch of msrs. All parameters are kernel addresses.
2413 *
2414 * @return number of msrs set successfully.
2415 */
bccf2150 2416static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
6aa8b732
AK		 2417 struct kvm_msr_entry *entries,
2418 int (*do_msr)(struct kvm_vcpu *vcpu,
2419 unsigned index, u64 *data))
2420{
6aa8b732
AK		 2421 int i;
2422
bccf2150 2423 vcpu_load(vcpu);
6aa8b732
AK		 2424
2425 for (i = 0; i < msrs->nmsrs; ++i)
2426 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2427 break;
2428
2429 vcpu_put(vcpu);
2430
2431 return i;
2432}
2433
2434/*
2435 * Read or write a bunch of msrs. Parameters are user addresses.
2436 *
2437 * @return number of msrs set successfully.
2438 */
bccf2150 2439static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
6aa8b732
AK		 2440 int (*do_msr)(struct kvm_vcpu *vcpu,
2441 unsigned index, u64 *data),
2442 int writeback)
2443{
2444 struct kvm_msrs msrs;
2445 struct kvm_msr_entry *entries;
2446 int r, n;
2447 unsigned size;
2448
2449 r = -EFAULT;
2450 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2451 goto out;
2452
2453 r = -E2BIG;
2454 if (msrs.nmsrs >= MAX_IO_MSRS)
2455 goto out;
2456
2457 r = -ENOMEM;
2458 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
2459 entries = vmalloc(size);
2460 if (!entries)
2461 goto out;
2462
2463 r = -EFAULT;
2464 if (copy_from_user(entries, user_msrs->entries, size))
2465 goto out_free;
2466
bccf2150 2467 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
6aa8b732
AK		 2468 if (r < 0)
2469 goto out_free;
2470
2471 r = -EFAULT;
2472 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2473 goto out_free;
2474
2475 r = n;
2476
2477out_free:
2478 vfree(entries);
2479out:
2480 return r;
2481}
2482
2483/*
2484 * Translate a guest virtual address to a guest physical address.
2485 */
bccf2150
AK		 2486static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2487 struct kvm_translation *tr)
6aa8b732
AK		 2488{
2489 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 2490 gpa_t gpa;
2491
bccf2150 2492 vcpu_load(vcpu);
11ec2804 2493 mutex_lock(&vcpu->kvm->lock);
6aa8b732
AK		 2494 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2495 tr->physical_address = gpa;
2496 tr->valid = gpa != UNMAPPED_GVA;
2497 tr->writeable = 1;
2498 tr->usermode = 0;
11ec2804 2499 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 2500 vcpu_put(vcpu);
2501
2502 return 0;
2503}
2504
bccf2150
AK		 2505static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2506 struct kvm_interrupt *irq)
6aa8b732 2507{
6aa8b732
AK		 2508 if (irq->irq < 0 || irq->irq >= 256)
2509 return -EINVAL;
97222cc8
ED		 2510 if (irqchip_in_kernel(vcpu->kvm))
2511 return -ENXIO;
bccf2150 2512 vcpu_load(vcpu);
6aa8b732
AK		 2513
2514 set_bit(irq->irq, vcpu->irq_pending);
2515 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2516
2517 vcpu_put(vcpu);
2518
2519 return 0;
2520}
2521
bccf2150
AK		 2522static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2523 struct kvm_debug_guest *dbg)
6aa8b732 2524{
6aa8b732
AK		 2525 int r;
2526
bccf2150 2527 vcpu_load(vcpu);
6aa8b732 2528
cbdd1bea 2529 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
6aa8b732
AK		 2530
2531 vcpu_put(vcpu);
2532
2533 return r;
2534}
2535
9a2bb7f4
AK		 2536static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2537 unsigned long address,
2538 int *type)
2539{
2540 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2541 unsigned long pgoff;
2542 struct page *page;
2543
9a2bb7f4 2544 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
039576c0
AK		 2545 if (pgoff == 0)
2546 page = virt_to_page(vcpu->run);
2547 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2548 page = virt_to_page(vcpu->pio_data);
2549 else
9a2bb7f4 2550 return NOPAGE_SIGBUS;
9a2bb7f4 2551 get_page(page);
cd0d9137
NAQ		 2552 if (type != NULL)
2553 *type = VM_FAULT_MINOR;
2554
9a2bb7f4
AK		 2555 return page;
2556}
2557
2558static struct vm_operations_struct kvm_vcpu_vm_ops = {
2559 .nopage = kvm_vcpu_nopage,
2560};
2561
2562static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2563{
2564 vma->vm_ops = &kvm_vcpu_vm_ops;
2565 return 0;
2566}
2567
bccf2150
AK		 2568static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2569{
2570 struct kvm_vcpu *vcpu = filp->private_data;
2571
2572 fput(vcpu->kvm->filp);
2573 return 0;
2574}
2575
2576static struct file_operations kvm_vcpu_fops = {
2577 .release = kvm_vcpu_release,
2578 .unlocked_ioctl = kvm_vcpu_ioctl,
2579 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 2580 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 2581};
2582
2583/*
2584 * Allocates an inode for the vcpu.
2585 */
2586static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2587{
2588 int fd, r;
2589 struct inode *inode;
2590 struct file *file;
2591
d6d28168
AK		 2592 r = anon_inode_getfd(&fd, &inode, &file,
2593 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2594 if (r)
2595 return r;
bccf2150 2596 atomic_inc(&vcpu->kvm->filp->f_count);
bccf2150 2597 return fd;
bccf2150
AK		 2598}
2599
c5ea7660
AK		 2600/*
2601 * Creates some virtual cpus. Good luck creating more than one.
2602 */
2603static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2604{
2605 int r;
2606 struct kvm_vcpu *vcpu;
2607
c5ea7660 2608 if (!valid_vcpu(n))
fb3f0f51 2609 return -EINVAL;
c5ea7660 2610
cbdd1bea 2611 vcpu = kvm_x86_ops->vcpu_create(kvm, n);
fb3f0f51
RR		 2612 if (IS_ERR(vcpu))
2613 return PTR_ERR(vcpu);
c5ea7660 2614
15ad7146
AK		 2615 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2616
b114b080
RR		 2617 /* We do fxsave: this must be aligned. */
2618 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2619
fb3f0f51 2620 vcpu_load(vcpu);
c5ea7660 2621 r = kvm_mmu_setup(vcpu);
c5ea7660 2622 vcpu_put(vcpu);
c5ea7660 2623 if (r < 0)
fb3f0f51
RR		 2624 goto free_vcpu;
2625
11ec2804 2626 mutex_lock(&kvm->lock);
fb3f0f51
RR		 2627 if (kvm->vcpus[n]) {
2628 r = -EEXIST;
11ec2804 2629 mutex_unlock(&kvm->lock);
fb3f0f51
RR		 2630 goto mmu_unload;
2631 }
2632 kvm->vcpus[n] = vcpu;
11ec2804 2633 mutex_unlock(&kvm->lock);
c5ea7660 2634
fb3f0f51 2635 /* Now it's all set up, let userspace reach it */
bccf2150
AK		 2636 r = create_vcpu_fd(vcpu);
2637 if (r < 0)
fb3f0f51
RR		 2638 goto unlink;
2639 return r;
39c3b86e 2640
fb3f0f51 2641unlink:
11ec2804 2642 mutex_lock(&kvm->lock);
fb3f0f51 2643 kvm->vcpus[n] = NULL;
11ec2804 2644 mutex_unlock(&kvm->lock);
a2fa3e9f 2645
fb3f0f51
RR		 2646mmu_unload:
2647 vcpu_load(vcpu);
2648 kvm_mmu_unload(vcpu);
2649 vcpu_put(vcpu);
c5ea7660 2650
fb3f0f51 2651free_vcpu:
cbdd1bea 2652 kvm_x86_ops->vcpu_free(vcpu);
c5ea7660
AK		 2653 return r;
2654}
2655
2cc51560
ED		 2656static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
2657{
2658 u64 efer;
2659 int i;
2660 struct kvm_cpuid_entry *e, *entry;
2661
2662 rdmsrl(MSR_EFER, efer);
2663 entry = NULL;
2664 for (i = 0; i < vcpu->cpuid_nent; ++i) {
2665 e = &vcpu->cpuid_entries[i];
2666 if (e->function == 0x80000001) {
2667 entry = e;
2668 break;
2669 }
2670 }
4c981b43 2671 if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
2cc51560 2672 entry->edx &= ~(1 << 20);
4c981b43 2673 printk(KERN_INFO "kvm: guest NX capability removed\n");
2cc51560
ED		 2674 }
2675}
2676
06465c5a
AK		 2677static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
2678 struct kvm_cpuid *cpuid,
2679 struct kvm_cpuid_entry __user *entries)
2680{
2681 int r;
2682
2683 r = -E2BIG;
2684 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2685 goto out;
2686 r = -EFAULT;
2687 if (copy_from_user(&vcpu->cpuid_entries, entries,
2688 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
2689 goto out;
2690 vcpu->cpuid_nent = cpuid->nent;
2cc51560 2691 cpuid_fix_nx_cap(vcpu);
06465c5a
AK		 2692 return 0;
2693
2694out:
2695 return r;
2696}
2697
1961d276
AK		 2698static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2699{
2700 if (sigset) {
2701 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2702 vcpu->sigset_active = 1;
2703 vcpu->sigset = *sigset;
2704 } else
2705 vcpu->sigset_active = 0;
2706 return 0;
2707}
2708
b8836737
AK		 2709/*
2710 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2711 * we have asm/x86/processor.h
2712 */
2713struct fxsave {
2714 u16 cwd;
2715 u16 swd;
2716 u16 twd;
2717 u16 fop;
2718 u64 rip;
2719 u64 rdp;
2720 u32 mxcsr;
2721 u32 mxcsr_mask;
2722 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2723#ifdef CONFIG_X86_64
2724 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2725#else
2726 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2727#endif
2728};
2729
2730static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2731{
b114b080 2732 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2733
2734 vcpu_load(vcpu);
2735
2736 memcpy(fpu->fpr, fxsave->st_space, 128);
2737 fpu->fcw = fxsave->cwd;
2738 fpu->fsw = fxsave->swd;
2739 fpu->ftwx = fxsave->twd;
2740 fpu->last_opcode = fxsave->fop;
2741 fpu->last_ip = fxsave->rip;
2742 fpu->last_dp = fxsave->rdp;
2743 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2744
2745 vcpu_put(vcpu);
2746
2747 return 0;
2748}
2749
2750static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2751{
b114b080 2752 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2753
2754 vcpu_load(vcpu);
2755
2756 memcpy(fxsave->st_space, fpu->fpr, 128);
2757 fxsave->cwd = fpu->fcw;
2758 fxsave->swd = fpu->fsw;
2759 fxsave->twd = fpu->ftwx;
2760 fxsave->fop = fpu->last_opcode;
2761 fxsave->rip = fpu->last_ip;
2762 fxsave->rdp = fpu->last_dp;
2763 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2764
2765 vcpu_put(vcpu);
2766
2767 return 0;
2768}
2769
96ad2cc6
ED		 2770static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2771 struct kvm_lapic_state *s)
2772{
2773 vcpu_load(vcpu);
2774 memcpy(s->regs, vcpu->apic->regs, sizeof *s);
2775 vcpu_put(vcpu);
2776
2777 return 0;
2778}
2779
2780static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2781 struct kvm_lapic_state *s)
2782{
2783 vcpu_load(vcpu);
2784 memcpy(vcpu->apic->regs, s->regs, sizeof *s);
2785 kvm_apic_post_state_restore(vcpu);
2786 vcpu_put(vcpu);
2787
2788 return 0;
2789}
2790
bccf2150
AK		 2791static long kvm_vcpu_ioctl(struct file *filp,
2792 unsigned int ioctl, unsigned long arg)
6aa8b732 2793{
bccf2150 2794 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 2795 void __user *argp = (void __user *)arg;
6aa8b732
AK		 2796 int r = -EINVAL;
2797
2798 switch (ioctl) {
9a2bb7f4 2799 case KVM_RUN:
f0fe5108
AK		 2800 r = -EINVAL;
2801 if (arg)
2802 goto out;
9a2bb7f4 2803 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 2804 break;
6aa8b732
AK		 2805 case KVM_GET_REGS: {
2806 struct kvm_regs kvm_regs;
2807
bccf2150
AK		 2808 memset(&kvm_regs, 0, sizeof kvm_regs);
2809 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2810 if (r)
2811 goto out;
2812 r = -EFAULT;
2f366987 2813 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2814 goto out;
2815 r = 0;
2816 break;
2817 }
2818 case KVM_SET_REGS: {
2819 struct kvm_regs kvm_regs;
2820
2821 r = -EFAULT;
2f366987 2822 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2823 goto out;
bccf2150 2824 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2825 if (r)
2826 goto out;
2827 r = 0;
2828 break;
2829 }
2830 case KVM_GET_SREGS: {
2831 struct kvm_sregs kvm_sregs;
2832
bccf2150
AK		 2833 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2834 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2835 if (r)
2836 goto out;
2837 r = -EFAULT;
2f366987 2838 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2839 goto out;
2840 r = 0;
2841 break;
2842 }
2843 case KVM_SET_SREGS: {
2844 struct kvm_sregs kvm_sregs;
2845
2846 r = -EFAULT;
2f366987 2847 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2848 goto out;
bccf2150 2849 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2850 if (r)
2851 goto out;
2852 r = 0;
2853 break;
2854 }
2855 case KVM_TRANSLATE: {
2856 struct kvm_translation tr;
2857
2858 r = -EFAULT;
2f366987 2859 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2860 goto out;
bccf2150 2861 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2862 if (r)
2863 goto out;
2864 r = -EFAULT;
2f366987 2865 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2866 goto out;
2867 r = 0;
2868 break;
2869 }
2870 case KVM_INTERRUPT: {
2871 struct kvm_interrupt irq;
2872
2873 r = -EFAULT;
2f366987 2874 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2875 goto out;
bccf2150 2876 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2877 if (r)
2878 goto out;
2879 r = 0;
2880 break;
2881 }
2882 case KVM_DEBUG_GUEST: {
2883 struct kvm_debug_guest dbg;
2884
2885 r = -EFAULT;
2f366987 2886 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2887 goto out;
bccf2150 2888 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2889 if (r)
2890 goto out;
2891 r = 0;
2892 break;
2893 }
bccf2150 2894 case KVM_GET_MSRS:
35f3f286 2895 r = msr_io(vcpu, argp, kvm_get_msr, 1);
bccf2150
AK		 2896 break;
2897 case KVM_SET_MSRS:
2898 r = msr_io(vcpu, argp, do_set_msr, 0);
2899 break;
06465c5a
AK		 2900 case KVM_SET_CPUID: {
2901 struct kvm_cpuid __user *cpuid_arg = argp;
2902 struct kvm_cpuid cpuid;
2903
2904 r = -EFAULT;
2905 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2906 goto out;
2907 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2908 if (r)
2909 goto out;
2910 break;
2911 }
1961d276
AK		 2912 case KVM_SET_SIGNAL_MASK: {
2913 struct kvm_signal_mask __user *sigmask_arg = argp;
2914 struct kvm_signal_mask kvm_sigmask;
2915 sigset_t sigset, *p;
2916
2917 p = NULL;
2918 if (argp) {
2919 r = -EFAULT;
2920 if (copy_from_user(&kvm_sigmask, argp,
2921 sizeof kvm_sigmask))
2922 goto out;
2923 r = -EINVAL;
2924 if (kvm_sigmask.len != sizeof sigset)
2925 goto out;
2926 r = -EFAULT;
2927 if (copy_from_user(&sigset, sigmask_arg->sigset,
2928 sizeof sigset))
2929 goto out;
2930 p = &sigset;
2931 }
2932 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2933 break;
2934 }
b8836737
AK		 2935 case KVM_GET_FPU: {
2936 struct kvm_fpu fpu;
2937
2938 memset(&fpu, 0, sizeof fpu);
2939 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2940 if (r)
2941 goto out;
2942 r = -EFAULT;
2943 if (copy_to_user(argp, &fpu, sizeof fpu))
2944 goto out;
2945 r = 0;
2946 break;
2947 }
2948 case KVM_SET_FPU: {
2949 struct kvm_fpu fpu;
2950
2951 r = -EFAULT;
2952 if (copy_from_user(&fpu, argp, sizeof fpu))
2953 goto out;
2954 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2955 if (r)
2956 goto out;
2957 r = 0;
2958 break;
2959 }
96ad2cc6
ED		 2960 case KVM_GET_LAPIC: {
2961 struct kvm_lapic_state lapic;
2962
2963 memset(&lapic, 0, sizeof lapic);
2964 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
2965 if (r)
2966 goto out;
2967 r = -EFAULT;
2968 if (copy_to_user(argp, &lapic, sizeof lapic))
2969 goto out;
2970 r = 0;
2971 break;
2972 }
2973 case KVM_SET_LAPIC: {
2974 struct kvm_lapic_state lapic;
2975
2976 r = -EFAULT;
2977 if (copy_from_user(&lapic, argp, sizeof lapic))
2978 goto out;
2979 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
2980 if (r)
2981 goto out;
2982 r = 0;
2983 break;
2984 }
bccf2150
AK		 2985 default:
2986 ;
2987 }
2988out:
2989 return r;
2990}
2991
2992static long kvm_vm_ioctl(struct file *filp,
2993 unsigned int ioctl, unsigned long arg)
2994{
2995 struct kvm *kvm = filp->private_data;
2996 void __user *argp = (void __user *)arg;
2997 int r = -EINVAL;
2998
2999 switch (ioctl) {
3000 case KVM_CREATE_VCPU:
3001 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
3002 if (r < 0)
3003 goto out;
3004 break;
6aa8b732
AK		 3005 case KVM_SET_MEMORY_REGION: {
3006 struct kvm_memory_region kvm_mem;
3007
3008 r = -EFAULT;
2f366987 3009 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 3010 goto out;
2c6f5df9 3011 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
6aa8b732
AK		 3012 if (r)
3013 goto out;
3014 break;
3015 }
3016 case KVM_GET_DIRTY_LOG: {
3017 struct kvm_dirty_log log;
3018
3019 r = -EFAULT;
2f366987 3020 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 3021 goto out;
2c6f5df9 3022 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 3023 if (r)
3024 goto out;
3025 break;
3026 }
e8207547
AK		 3027 case KVM_SET_MEMORY_ALIAS: {
3028 struct kvm_memory_alias alias;
3029
3030 r = -EFAULT;
3031 if (copy_from_user(&alias, argp, sizeof alias))
3032 goto out;
3033 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
3034 if (r)
3035 goto out;
3036 break;
3037 }
85f455f7
ED		 3038 case KVM_CREATE_IRQCHIP:
3039 r = -ENOMEM;
3040 kvm->vpic = kvm_create_pic(kvm);
1fd4f2a5
ED		 3041 if (kvm->vpic) {
3042 r = kvm_ioapic_init(kvm);
3043 if (r) {
3044 kfree(kvm->vpic);
3045 kvm->vpic = NULL;
3046 goto out;
3047 }
3048 }
85f455f7
ED		 3049 else
3050 goto out;
3051 break;
3052 case KVM_IRQ_LINE: {
3053 struct kvm_irq_level irq_event;
3054
3055 r = -EFAULT;
3056 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3057 goto out;
3058 if (irqchip_in_kernel(kvm)) {
9cf98828 3059 mutex_lock(&kvm->lock);
85f455f7
ED		 3060 if (irq_event.irq < 16)
3061 kvm_pic_set_irq(pic_irqchip(kvm),
3062 irq_event.irq,
3063 irq_event.level);
1fd4f2a5
ED		 3064 kvm_ioapic_set_irq(kvm->vioapic,
3065 irq_event.irq,
3066 irq_event.level);
9cf98828 3067 mutex_unlock(&kvm->lock);
85f455f7
ED		 3068 r = 0;
3069 }
3070 break;
3071 }
6ceb9d79
HQ		 3072 case KVM_GET_IRQCHIP: {
3073 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3074 struct kvm_irqchip chip;
3075
3076 r = -EFAULT;
3077 if (copy_from_user(&chip, argp, sizeof chip))
3078 goto out;
3079 r = -ENXIO;
3080 if (!irqchip_in_kernel(kvm))
3081 goto out;
3082 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
3083 if (r)
3084 goto out;
3085 r = -EFAULT;
3086 if (copy_to_user(argp, &chip, sizeof chip))
3087 goto out;
3088 r = 0;
3089 break;
3090 }
3091 case KVM_SET_IRQCHIP: {
3092 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3093 struct kvm_irqchip chip;
3094
3095 r = -EFAULT;
3096 if (copy_from_user(&chip, argp, sizeof chip))
3097 goto out;
3098 r = -ENXIO;
3099 if (!irqchip_in_kernel(kvm))
3100 goto out;
3101 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
3102 if (r)
3103 goto out;
3104 r = 0;
3105 break;
3106 }
f17abe9a
AK		 3107 default:
3108 ;
3109 }
3110out:
3111 return r;
3112}
3113
3114static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3115 unsigned long address,
3116 int *type)
3117{
3118 struct kvm *kvm = vma->vm_file->private_data;
3119 unsigned long pgoff;
f17abe9a
AK		 3120 struct page *page;
3121
f17abe9a 3122 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
954bbbc2 3123 page = gfn_to_page(kvm, pgoff);
f17abe9a
AK		 3124 if (!page)
3125 return NOPAGE_SIGBUS;
3126 get_page(page);
cd0d9137
NAQ		 3127 if (type != NULL)
3128 *type = VM_FAULT_MINOR;
3129
f17abe9a
AK		 3130 return page;
3131}
3132
3133static struct vm_operations_struct kvm_vm_vm_ops = {
3134 .nopage = kvm_vm_nopage,
3135};
3136
3137static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3138{
3139 vma->vm_ops = &kvm_vm_vm_ops;
3140 return 0;
3141}
3142
3143static struct file_operations kvm_vm_fops = {
3144 .release = kvm_vm_release,
3145 .unlocked_ioctl = kvm_vm_ioctl,
3146 .compat_ioctl = kvm_vm_ioctl,
3147 .mmap = kvm_vm_mmap,
3148};
3149
3150static int kvm_dev_ioctl_create_vm(void)
3151{
3152 int fd, r;
3153 struct inode *inode;
3154 struct file *file;
3155 struct kvm *kvm;
3156
f17abe9a 3157 kvm = kvm_create_vm();
d6d28168
AK		 3158 if (IS_ERR(kvm))
3159 return PTR_ERR(kvm);
3160 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3161 if (r) {
3162 kvm_destroy_vm(kvm);
3163 return r;
f17abe9a
AK		 3164 }
3165
bccf2150 3166 kvm->filp = file;
f17abe9a 3167
f17abe9a 3168 return fd;
f17abe9a
AK		 3169}
3170
3171static long kvm_dev_ioctl(struct file *filp,
3172 unsigned int ioctl, unsigned long arg)
3173{
3174 void __user *argp = (void __user *)arg;
07c45a36 3175 long r = -EINVAL;
f17abe9a
AK		 3176
3177 switch (ioctl) {
3178 case KVM_GET_API_VERSION:
f0fe5108
AK		 3179 r = -EINVAL;
3180 if (arg)
3181 goto out;
f17abe9a
AK		 3182 r = KVM_API_VERSION;
3183 break;
3184 case KVM_CREATE_VM:
f0fe5108
AK		 3185 r = -EINVAL;
3186 if (arg)
3187 goto out;
f17abe9a
AK		 3188 r = kvm_dev_ioctl_create_vm();
3189 break;
6aa8b732 3190 case KVM_GET_MSR_INDEX_LIST: {
2f366987 3191 struct kvm_msr_list __user *user_msr_list = argp;
6aa8b732
AK		 3192 struct kvm_msr_list msr_list;
3193 unsigned n;
3194
3195 r = -EFAULT;
3196 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
3197 goto out;
3198 n = msr_list.nmsrs;
6f00e68f 3199 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
6aa8b732
AK		 3200 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
3201 goto out;
3202 r = -E2BIG;
bf591b24 3203 if (n < num_msrs_to_save)
6aa8b732
AK		 3204 goto out;
3205 r = -EFAULT;
3206 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
bf591b24 3207 num_msrs_to_save * sizeof(u32)))
6aa8b732 3208 goto out;
6f00e68f
AK		 3209 if (copy_to_user(user_msr_list->indices
3210 + num_msrs_to_save * sizeof(u32),
3211 &emulated_msrs,
3212 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
3213 goto out;
6aa8b732 3214 r = 0;
cc1d8955 3215 break;
6aa8b732 3216 }
85f455f7
ED		 3217 case KVM_CHECK_EXTENSION: {
3218 int ext = (long)argp;
3219
3220 switch (ext) {
3221 case KVM_CAP_IRQCHIP:
b6958ce4 3222 case KVM_CAP_HLT:
85f455f7
ED		 3223 r = 1;
3224 break;
3225 default:
3226 r = 0;
3227 break;
3228 }
5d308f45 3229 break;
85f455f7 3230 }
07c45a36
AK		 3231 case KVM_GET_VCPU_MMAP_SIZE:
3232 r = -EINVAL;
3233 if (arg)
3234 goto out;
039576c0 3235 r = 2 * PAGE_SIZE;
07c45a36 3236 break;
6aa8b732
AK		 3237 default:
3238 ;
3239 }
3240out:
3241 return r;
3242}
3243
6aa8b732 3244static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 3245 .unlocked_ioctl = kvm_dev_ioctl,
3246 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 3247};
3248
3249static struct miscdevice kvm_dev = {
bbe4432e 3250 KVM_MINOR,
6aa8b732
AK		 3251 "kvm",
3252 &kvm_chardev_ops,
3253};
3254
774c47f1
AK		 3255/*
3256 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3257 * cached on it.
3258 */
3259static void decache_vcpus_on_cpu(int cpu)
3260{
3261 struct kvm *vm;
3262 struct kvm_vcpu *vcpu;
3263 int i;
3264
3265 spin_lock(&kvm_lock);
11ec2804 3266 list_for_each_entry(vm, &vm_list, vm_list)
774c47f1 3267 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3268 vcpu = vm->vcpus[i];
3269 if (!vcpu)
3270 continue;
774c47f1
AK		 3271 /*
3272 * If the vcpu is locked, then it is running on some
3273 * other cpu and therefore it is not cached on the
3274 * cpu in question.
3275 *
3276 * If it's not locked, check the last cpu it executed
3277 * on.
3278 */
3279 if (mutex_trylock(&vcpu->mutex)) {
3280 if (vcpu->cpu == cpu) {
cbdd1bea 3281 kvm_x86_ops->vcpu_decache(vcpu);
774c47f1
AK		 3282 vcpu->cpu = -1;
3283 }
3284 mutex_unlock(&vcpu->mutex);
3285 }
3286 }
3287 spin_unlock(&kvm_lock);
3288}
3289
1b6c0168
AK		 3290static void hardware_enable(void *junk)
3291{
3292 int cpu = raw_smp_processor_id();
3293
3294 if (cpu_isset(cpu, cpus_hardware_enabled))
3295 return;
3296 cpu_set(cpu, cpus_hardware_enabled);
cbdd1bea 3297 kvm_x86_ops->hardware_enable(NULL);
1b6c0168
AK		 3298}
3299
3300static void hardware_disable(void *junk)
3301{
3302 int cpu = raw_smp_processor_id();
3303
3304 if (!cpu_isset(cpu, cpus_hardware_enabled))
3305 return;
3306 cpu_clear(cpu, cpus_hardware_enabled);
3307 decache_vcpus_on_cpu(cpu);
cbdd1bea 3308 kvm_x86_ops->hardware_disable(NULL);
1b6c0168
AK		 3309}
3310
774c47f1
AK		 3311static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3312 void *v)
3313{
3314 int cpu = (long)v;
3315
3316 switch (val) {
cec9ad27
AK		 3317 case CPU_DYING:
3318 case CPU_DYING_FROZEN:
6ec8a856
AK		 3319 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3320 cpu);
3321 hardware_disable(NULL);
3322 break;
774c47f1 3323 case CPU_UP_CANCELED:
8bb78442 3324 case CPU_UP_CANCELED_FROZEN:
43934a38
JK		 3325 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3326 cpu);
1b6c0168 3327 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
774c47f1 3328 break;
43934a38 3329 case CPU_ONLINE:
8bb78442 3330 case CPU_ONLINE_FROZEN:
43934a38
JK		 3331 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3332 cpu);
1b6c0168 3333 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
774c47f1
AK		 3334 break;
3335 }
3336 return NOTIFY_OK;
3337}
3338
9a2b85c6
RR		 3339static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
3340 void *v)
3341{
3342 if (val == SYS_RESTART) {
3343 /*
3344 * Some (well, at least mine) BIOSes hang on reboot if
3345 * in vmx root mode.
3346 */
3347 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3348 on_each_cpu(hardware_disable, NULL, 0, 1);
3349 }
3350 return NOTIFY_OK;
3351}
3352
3353static struct notifier_block kvm_reboot_notifier = {
3354 .notifier_call = kvm_reboot,
3355 .priority = 0,
3356};
3357
2eeb2e94
GH		 3358void kvm_io_bus_init(struct kvm_io_bus *bus)
3359{
3360 memset(bus, 0, sizeof(*bus));
3361}
3362
3363void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3364{
3365 int i;
3366
3367 for (i = 0; i < bus->dev_count; i++) {
3368 struct kvm_io_device *pos = bus->devs[i];
3369
3370 kvm_iodevice_destructor(pos);
3371 }
3372}
3373
3374struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3375{
3376 int i;
3377
3378 for (i = 0; i < bus->dev_count; i++) {
3379 struct kvm_io_device *pos = bus->devs[i];
3380
3381 if (pos->in_range(pos, addr))
3382 return pos;
3383 }
3384
3385 return NULL;
3386}
3387
3388void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3389{
3390 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3391
3392 bus->devs[bus->dev_count++] = dev;
3393}
3394
774c47f1
AK		 3395static struct notifier_block kvm_cpu_notifier = {
3396 .notifier_call = kvm_cpu_hotplug,
3397 .priority = 20, /* must be > scheduler priority */
3398};
3399
1165f5fe
AK		 3400static u64 stat_get(void *_offset)
3401{
3402 unsigned offset = (long)_offset;
3403 u64 total = 0;
3404 struct kvm *kvm;
3405 struct kvm_vcpu *vcpu;
3406 int i;
3407
3408 spin_lock(&kvm_lock);
3409 list_for_each_entry(kvm, &vm_list, vm_list)
3410 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3411 vcpu = kvm->vcpus[i];
3412 if (vcpu)
3413 total += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 3414 }
3415 spin_unlock(&kvm_lock);
3416 return total;
3417}
3418
3dea7ca7 3419DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
1165f5fe 3420
6aa8b732
AK		 3421static __init void kvm_init_debug(void)
3422{
3423 struct kvm_stats_debugfs_item *p;
3424
8b6d44c7 3425 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 3426 for (p = debugfs_entries; p->name; ++p)
1165f5fe
AK		 3427 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3428 (void *)(long)p->offset,
3429 &stat_fops);
6aa8b732
AK		 3430}
3431
3432static void kvm_exit_debug(void)
3433{
3434 struct kvm_stats_debugfs_item *p;
3435
3436 for (p = debugfs_entries; p->name; ++p)
3437 debugfs_remove(p->dentry);
3438 debugfs_remove(debugfs_dir);
3439}
3440
59ae6c6b
AK		 3441static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3442{
4267c41a 3443 hardware_disable(NULL);
59ae6c6b
AK		 3444 return 0;
3445}
3446
3447static int kvm_resume(struct sys_device *dev)
3448{
4267c41a 3449 hardware_enable(NULL);
59ae6c6b
AK		 3450 return 0;
3451}
3452
3453static struct sysdev_class kvm_sysdev_class = {
af5ca3f4 3454 .name = "kvm",
59ae6c6b
AK		 3455 .suspend = kvm_suspend,
3456 .resume = kvm_resume,
3457};
3458
3459static struct sys_device kvm_sysdev = {
3460 .id = 0,
3461 .cls = &kvm_sysdev_class,
3462};
3463
6aa8b732
AK		 3464hpa_t bad_page_address;
3465
15ad7146
AK		 3466static inline
3467struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3468{
3469 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3470}
3471
3472static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3473{
3474 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3475
cbdd1bea 3476 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146
AK		 3477}
3478
3479static void kvm_sched_out(struct preempt_notifier *pn,
3480 struct task_struct *next)
3481{
3482 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3483
cbdd1bea 3484 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 3485}
3486
cbdd1bea 3487int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
c16f862d 3488 struct module *module)
6aa8b732
AK		 3489{
3490 int r;
002c7f7c 3491 int cpu;
6aa8b732 3492
cbdd1bea 3493 if (kvm_x86_ops) {
09db28b8
YI		 3494 printk(KERN_ERR "kvm: already loaded the other module\n");
3495 return -EEXIST;
3496 }
3497
e097f35c 3498 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 3499 printk(KERN_ERR "kvm: no hardware support\n");
3500 return -EOPNOTSUPP;
3501 }
e097f35c 3502 if (ops->disabled_by_bios()) {
6aa8b732
AK		 3503 printk(KERN_ERR "kvm: disabled by bios\n");
3504 return -EOPNOTSUPP;
3505 }
3506
cbdd1bea 3507 kvm_x86_ops = ops;
e097f35c 3508
cbdd1bea 3509 r = kvm_x86_ops->hardware_setup();
6aa8b732 3510 if (r < 0)
ca45aaae 3511 goto out;
6aa8b732 3512
002c7f7c
YS		 3513 for_each_online_cpu(cpu) {
3514 smp_call_function_single(cpu,
cbdd1bea 3515 kvm_x86_ops->check_processor_compatibility,
002c7f7c
YS		 3516 &r, 0, 1);
3517 if (r < 0)
3518 goto out_free_0;
3519 }
3520
1b6c0168 3521 on_each_cpu(hardware_enable, NULL, 0, 1);
774c47f1
AK		 3522 r = register_cpu_notifier(&kvm_cpu_notifier);
3523 if (r)
3524 goto out_free_1;
6aa8b732
AK		 3525 register_reboot_notifier(&kvm_reboot_notifier);
3526
59ae6c6b
AK		 3527 r = sysdev_class_register(&kvm_sysdev_class);
3528 if (r)
3529 goto out_free_2;
3530
3531 r = sysdev_register(&kvm_sysdev);
3532 if (r)
3533 goto out_free_3;
3534
c16f862d
RR		 3535 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3536 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3537 __alignof__(struct kvm_vcpu), 0, 0);
3538 if (!kvm_vcpu_cache) {
3539 r = -ENOMEM;
3540 goto out_free_4;
3541 }
3542
6aa8b732
AK		 3543 kvm_chardev_ops.owner = module;
3544
3545 r = misc_register(&kvm_dev);
3546 if (r) {
3547 printk (KERN_ERR "kvm: misc device register failed\n");
3548 goto out_free;
3549 }
3550
15ad7146
AK		 3551 kvm_preempt_ops.sched_in = kvm_sched_in;
3552 kvm_preempt_ops.sched_out = kvm_sched_out;
3553
6aa8b732
AK		 3554 return r;
3555
3556out_free:
c16f862d
RR		 3557 kmem_cache_destroy(kvm_vcpu_cache);
3558out_free_4:
59ae6c6b
AK		 3559 sysdev_unregister(&kvm_sysdev);
3560out_free_3:
3561 sysdev_class_unregister(&kvm_sysdev_class);
3562out_free_2:
6aa8b732 3563 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 3564 unregister_cpu_notifier(&kvm_cpu_notifier);
3565out_free_1:
1b6c0168 3566 on_each_cpu(hardware_disable, NULL, 0, 1);
002c7f7c 3567out_free_0:
cbdd1bea 3568 kvm_x86_ops->hardware_unsetup();
ca45aaae 3569out:
cbdd1bea 3570 kvm_x86_ops = NULL;
6aa8b732
AK		 3571 return r;
3572}
3573
cbdd1bea 3574void kvm_exit_x86(void)
6aa8b732
AK		 3575{
3576 misc_deregister(&kvm_dev);
c16f862d 3577 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 3578 sysdev_unregister(&kvm_sysdev);
3579 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 3580 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 3581 unregister_cpu_notifier(&kvm_cpu_notifier);
1b6c0168 3582 on_each_cpu(hardware_disable, NULL, 0, 1);
cbdd1bea
CE		 3583 kvm_x86_ops->hardware_unsetup();
3584 kvm_x86_ops = NULL;
6aa8b732
AK		 3585}
3586
3587static __init int kvm_init(void)
3588{
3589 static struct page *bad_page;
37e29d90
AK		 3590 int r;
3591
b5a33a75
AK		 3592 r = kvm_mmu_module_init();
3593 if (r)
3594 goto out4;
3595
6aa8b732
AK		 3596 kvm_init_debug();
3597
bf591b24
MR		 3598 kvm_init_msr_list();
3599
6aa8b732
AK		 3600 if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
3601 r = -ENOMEM;
3602 goto out;
3603 }
3604
3605 bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
3606 memset(__va(bad_page_address), 0, PAGE_SIZE);
3607
58e690e6 3608 return 0;
6aa8b732
AK		 3609
3610out:
3611 kvm_exit_debug();
b5a33a75
AK		 3612 kvm_mmu_module_exit();
3613out4:
6aa8b732
AK		 3614 return r;
3615}
3616
3617static __exit void kvm_exit(void)
3618{
3619 kvm_exit_debug();
3620 __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
b5a33a75 3621 kvm_mmu_module_exit();
6aa8b732
AK		 3622}
3623
3624module_init(kvm_init)
3625module_exit(kvm_exit)
3626
cbdd1bea
CE		 3627EXPORT_SYMBOL_GPL(kvm_init_x86);
3628EXPORT_SYMBOL_GPL(kvm_exit_x86);
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