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KVM: Bump API version
[mirror_ubuntu-artful-kernel.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"
19
20#include <linux/kvm.h>
21#include <linux/module.h>
22#include <linux/errno.h>
23#include <asm/processor.h>
24#include <linux/percpu.h>
25#include <linux/gfp.h>
26#include <asm/msr.h>
27#include <linux/mm.h>
28#include <linux/miscdevice.h>
29#include <linux/vmalloc.h>
30#include <asm/uaccess.h>
31#include <linux/reboot.h>
32#include <asm/io.h>
33#include <linux/debugfs.h>
34#include <linux/highmem.h>
35#include <linux/file.h>
36#include <asm/desc.h>
59ae6c6b 37#include <linux/sysdev.h>
774c47f1 38#include <linux/cpu.h>
f17abe9a 39#include <linux/file.h>
37e29d90
AK		 40#include <linux/fs.h>
41#include <linux/mount.h>
6aa8b732
AK		 42
43#include "x86_emulate.h"
44#include "segment_descriptor.h"
45
46MODULE_AUTHOR("Qumranet");
47MODULE_LICENSE("GPL");
48
133de902
AK		 49static DEFINE_SPINLOCK(kvm_lock);
50static LIST_HEAD(vm_list);
51
6aa8b732
AK		 52struct kvm_arch_ops *kvm_arch_ops;
53struct kvm_stat kvm_stat;
54EXPORT_SYMBOL_GPL(kvm_stat);
55
56static struct kvm_stats_debugfs_item {
57 const char *name;
58 u32 *data;
59 struct dentry *dentry;
60} debugfs_entries[] = {
61 { "pf_fixed", &kvm_stat.pf_fixed },
62 { "pf_guest", &kvm_stat.pf_guest },
63 { "tlb_flush", &kvm_stat.tlb_flush },
64 { "invlpg", &kvm_stat.invlpg },
65 { "exits", &kvm_stat.exits },
66 { "io_exits", &kvm_stat.io_exits },
67 { "mmio_exits", &kvm_stat.mmio_exits },
68 { "signal_exits", &kvm_stat.signal_exits },
c1150d8c
DL		 69 { "irq_window", &kvm_stat.irq_window_exits },
70 { "halt_exits", &kvm_stat.halt_exits },
71 { "request_irq", &kvm_stat.request_irq_exits },
6aa8b732 72 { "irq_exits", &kvm_stat.irq_exits },
8b6d44c7 73 { NULL, NULL }
6aa8b732
AK		 74};
75
76static struct dentry *debugfs_dir;
77
37e29d90
AK		 78#define KVMFS_MAGIC 0x19700426
79struct vfsmount *kvmfs_mnt;
80
6aa8b732
AK		 81#define MAX_IO_MSRS 256
82
83#define CR0_RESEVED_BITS 0xffffffff1ffaffc0ULL
84#define LMSW_GUEST_MASK 0x0eULL
85#define CR4_RESEVED_BITS (~((1ULL << 11) - 1))
86#define CR8_RESEVED_BITS (~0x0fULL)
87#define EFER_RESERVED_BITS 0xfffffffffffff2fe
88
05b3e0c2 89#ifdef CONFIG_X86_64
6aa8b732
AK		 90// LDT or TSS descriptor in the GDT. 16 bytes.
91struct segment_descriptor_64 {
92 struct segment_descriptor s;
93 u32 base_higher;
94 u32 pad_zero;
95};
96
97#endif
98
bccf2150
AK		 99static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
100 unsigned long arg);
101
f17abe9a
AK		 102static struct inode *kvmfs_inode(struct file_operations *fops)
103{
104 int error = -ENOMEM;
105 struct inode *inode = new_inode(kvmfs_mnt->mnt_sb);
106
107 if (!inode)
108 goto eexit_1;
109
110 inode->i_fop = fops;
111
112 /*
113 * Mark the inode dirty from the very beginning,
114 * that way it will never be moved to the dirty
115 * list because mark_inode_dirty() will think
116 * that it already _is_ on the dirty list.
117 */
118 inode->i_state = I_DIRTY;
119 inode->i_mode = S_IRUSR | S_IWUSR;
120 inode->i_uid = current->fsuid;
121 inode->i_gid = current->fsgid;
122 inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
123 return inode;
124
125eexit_1:
126 return ERR_PTR(error);
127}
128
129static struct file *kvmfs_file(struct inode *inode, void *private_data)
130{
131 struct file *file = get_empty_filp();
132
133 if (!file)
134 return ERR_PTR(-ENFILE);
135
136 file->f_path.mnt = mntget(kvmfs_mnt);
137 file->f_path.dentry = d_alloc_anon(inode);
138 if (!file->f_path.dentry)
139 return ERR_PTR(-ENOMEM);
140 file->f_mapping = inode->i_mapping;
141
142 file->f_pos = 0;
143 file->f_flags = O_RDWR;
144 file->f_op = inode->i_fop;
145 file->f_mode = FMODE_READ | FMODE_WRITE;
146 file->f_version = 0;
147 file->private_data = private_data;
148 return file;
149}
150
6aa8b732
AK		 151unsigned long segment_base(u16 selector)
152{
153 struct descriptor_table gdt;
154 struct segment_descriptor *d;
155 unsigned long table_base;
156 typedef unsigned long ul;
157 unsigned long v;
158
159 if (selector == 0)
160 return 0;
161
162 asm ("sgdt %0" : "=m"(gdt));
163 table_base = gdt.base;
164
165 if (selector & 4) { /* from ldt */
166 u16 ldt_selector;
167
168 asm ("sldt %0" : "=g"(ldt_selector));
169 table_base = segment_base(ldt_selector);
170 }
171 d = (struct segment_descriptor *)(table_base + (selector & ~7));
172 v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
05b3e0c2 173#ifdef CONFIG_X86_64
6aa8b732
AK		 174 if (d->system == 0
175 && (d->type == 2 || d->type == 9 || d->type == 11))
176 v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32;
177#endif
178 return v;
179}
180EXPORT_SYMBOL_GPL(segment_base);
181
5aacf0ca
JM		 182static inline int valid_vcpu(int n)
183{
184 return likely(n >= 0 && n < KVM_MAX_VCPUS);
185}
186
d27d4aca
AK		 187int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size,
188 void *dest)
6aa8b732
AK		 189{
190 unsigned char *host_buf = dest;
191 unsigned long req_size = size;
192
193 while (size) {
194 hpa_t paddr;
195 unsigned now;
196 unsigned offset;
197 hva_t guest_buf;
198
199 paddr = gva_to_hpa(vcpu, addr);
200
201 if (is_error_hpa(paddr))
202 break;
203
204 guest_buf = (hva_t)kmap_atomic(
205 pfn_to_page(paddr >> PAGE_SHIFT),
206 KM_USER0);
207 offset = addr & ~PAGE_MASK;
208 guest_buf |= offset;
209 now = min(size, PAGE_SIZE - offset);
210 memcpy(host_buf, (void*)guest_buf, now);
211 host_buf += now;
212 addr += now;
213 size -= now;
214 kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0);
215 }
216 return req_size - size;
217}
218EXPORT_SYMBOL_GPL(kvm_read_guest);
219
d27d4aca
AK		 220int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size,
221 void *data)
6aa8b732
AK		 222{
223 unsigned char *host_buf = data;
224 unsigned long req_size = size;
225
226 while (size) {
227 hpa_t paddr;
228 unsigned now;
229 unsigned offset;
230 hva_t guest_buf;
231
232 paddr = gva_to_hpa(vcpu, addr);
233
234 if (is_error_hpa(paddr))
235 break;
236
237 guest_buf = (hva_t)kmap_atomic(
238 pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0);
239 offset = addr & ~PAGE_MASK;
240 guest_buf |= offset;
241 now = min(size, PAGE_SIZE - offset);
242 memcpy((void*)guest_buf, host_buf, now);
243 host_buf += now;
244 addr += now;
245 size -= now;
246 kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0);
247 }
248 return req_size - size;
249}
250EXPORT_SYMBOL_GPL(kvm_write_guest);
251
bccf2150
AK		 252/*
253 * Switches to specified vcpu, until a matching vcpu_put()
254 */
255static void vcpu_load(struct kvm_vcpu *vcpu)
6aa8b732 256{
bccf2150
AK		 257 mutex_lock(&vcpu->mutex);
258 kvm_arch_ops->vcpu_load(vcpu);
6aa8b732
AK		 259}
260
261/*
bccf2150
AK		 262 * Switches to specified vcpu, until a matching vcpu_put(). Will return NULL
263 * if the slot is not populated.
6aa8b732 264 */
bccf2150 265static struct kvm_vcpu *vcpu_load_slot(struct kvm *kvm, int slot)
6aa8b732 266{
bccf2150 267 struct kvm_vcpu *vcpu = &kvm->vcpus[slot];
6aa8b732
AK		 268
269 mutex_lock(&vcpu->mutex);
bccf2150 270 if (!vcpu->vmcs) {
6aa8b732 271 mutex_unlock(&vcpu->mutex);
8b6d44c7 272 return NULL;
6aa8b732 273 }
bccf2150
AK		 274 kvm_arch_ops->vcpu_load(vcpu);
275 return vcpu;
6aa8b732
AK		 276}
277
278static void vcpu_put(struct kvm_vcpu *vcpu)
279{
280 kvm_arch_ops->vcpu_put(vcpu);
6aa8b732
AK		 281 mutex_unlock(&vcpu->mutex);
282}
283
f17abe9a 284static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 285{
286 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
287 int i;
288
289 if (!kvm)
f17abe9a 290 return ERR_PTR(-ENOMEM);
6aa8b732
AK		 291
292 spin_lock_init(&kvm->lock);
293 INIT_LIST_HEAD(&kvm->active_mmu_pages);
294 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
295 struct kvm_vcpu *vcpu = &kvm->vcpus[i];
296
297 mutex_init(&vcpu->mutex);
133de902 298 vcpu->cpu = -1;
86a2b42e 299 vcpu->kvm = kvm;
6aa8b732
AK		 300 vcpu->mmu.root_hpa = INVALID_PAGE;
301 INIT_LIST_HEAD(&vcpu->free_pages);
133de902
AK		 302 spin_lock(&kvm_lock);
303 list_add(&kvm->vm_list, &vm_list);
304 spin_unlock(&kvm_lock);
6aa8b732 305 }
f17abe9a
AK		 306 return kvm;
307}
308
309static int kvm_dev_open(struct inode *inode, struct file *filp)
310{
6aa8b732
AK		 311 return 0;
312}
313
314/*
315 * Free any memory in @free but not in @dont.
316 */
317static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
318 struct kvm_memory_slot *dont)
319{
320 int i;
321
322 if (!dont || free->phys_mem != dont->phys_mem)
323 if (free->phys_mem) {
324 for (i = 0; i < free->npages; ++i)
55a54f79
AK		 325 if (free->phys_mem[i])
326 __free_page(free->phys_mem[i]);
6aa8b732
AK		 327 vfree(free->phys_mem);
328 }
329
330 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
331 vfree(free->dirty_bitmap);
332
8b6d44c7 333 free->phys_mem = NULL;
6aa8b732 334 free->npages = 0;
8b6d44c7 335 free->dirty_bitmap = NULL;
6aa8b732
AK		 336}
337
338static void kvm_free_physmem(struct kvm *kvm)
339{
340 int i;
341
342 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 343 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 344}
345
346static void kvm_free_vcpu(struct kvm_vcpu *vcpu)
347{
bccf2150 348 if (!vcpu->vmcs)
1e8ba6fb
IM		 349 return;
350
bccf2150 351 vcpu_load(vcpu);
6aa8b732 352 kvm_mmu_destroy(vcpu);
08438475 353 vcpu_put(vcpu);
9ede74e0 354 kvm_arch_ops->vcpu_free(vcpu);
6aa8b732
AK		 355}
356
357static void kvm_free_vcpus(struct kvm *kvm)
358{
359 unsigned int i;
360
361 for (i = 0; i < KVM_MAX_VCPUS; ++i)
362 kvm_free_vcpu(&kvm->vcpus[i]);
363}
364
365static int kvm_dev_release(struct inode *inode, struct file *filp)
366{
f17abe9a
AK		 367 return 0;
368}
6aa8b732 369
f17abe9a
AK		 370static void kvm_destroy_vm(struct kvm *kvm)
371{
133de902
AK		 372 spin_lock(&kvm_lock);
373 list_del(&kvm->vm_list);
374 spin_unlock(&kvm_lock);
6aa8b732
AK		 375 kvm_free_vcpus(kvm);
376 kvm_free_physmem(kvm);
377 kfree(kvm);
f17abe9a
AK		 378}
379
380static int kvm_vm_release(struct inode *inode, struct file *filp)
381{
382 struct kvm *kvm = filp->private_data;
383
384 kvm_destroy_vm(kvm);
6aa8b732
AK		 385 return 0;
386}
387
388static void inject_gp(struct kvm_vcpu *vcpu)
389{
390 kvm_arch_ops->inject_gp(vcpu, 0);
391}
392
1342d353
AK		 393/*
394 * Load the pae pdptrs. Return true is they are all valid.
395 */
396static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 397{
398 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 399 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732
AK		 400 int i;
401 u64 pdpte;
402 u64 *pdpt;
1342d353 403 int ret;
6aa8b732
AK		 404 struct kvm_memory_slot *memslot;
405
406 spin_lock(&vcpu->kvm->lock);
407 memslot = gfn_to_memslot(vcpu->kvm, pdpt_gfn);
408 /* FIXME: !memslot - emulate? 0xff? */
409 pdpt = kmap_atomic(gfn_to_page(memslot, pdpt_gfn), KM_USER0);
410
1342d353 411 ret = 1;
6aa8b732
AK		 412 for (i = 0; i < 4; ++i) {
413 pdpte = pdpt[offset + i];
1342d353
AK		 414 if ((pdpte & 1) && (pdpte & 0xfffffff0000001e6ull)) {
415 ret = 0;
416 goto out;
417 }
6aa8b732
AK		 418 }
419
1342d353
AK		 420 for (i = 0; i < 4; ++i)
421 vcpu->pdptrs[i] = pdpt[offset + i];
422
423out:
6aa8b732
AK		 424 kunmap_atomic(pdpt, KM_USER0);
425 spin_unlock(&vcpu->kvm->lock);
426
1342d353 427 return ret;
6aa8b732
AK		 428}
429
430void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
431{
432 if (cr0 & CR0_RESEVED_BITS) {
433 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
434 cr0, vcpu->cr0);
435 inject_gp(vcpu);
436 return;
437 }
438
439 if ((cr0 & CR0_NW_MASK) && !(cr0 & CR0_CD_MASK)) {
440 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
441 inject_gp(vcpu);
442 return;
443 }
444
445 if ((cr0 & CR0_PG_MASK) && !(cr0 & CR0_PE_MASK)) {
446 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
447 "and a clear PE flag\n");
448 inject_gp(vcpu);
449 return;
450 }
451
452 if (!is_paging(vcpu) && (cr0 & CR0_PG_MASK)) {
05b3e0c2 453#ifdef CONFIG_X86_64
6aa8b732
AK		 454 if ((vcpu->shadow_efer & EFER_LME)) {
455 int cs_db, cs_l;
456
457 if (!is_pae(vcpu)) {
458 printk(KERN_DEBUG "set_cr0: #GP, start paging "
459 "in long mode while PAE is disabled\n");
460 inject_gp(vcpu);
461 return;
462 }
463 kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
464 if (cs_l) {
465 printk(KERN_DEBUG "set_cr0: #GP, start paging "
466 "in long mode while CS.L == 1\n");
467 inject_gp(vcpu);
468 return;
469
470 }
471 } else
472#endif
1342d353 473 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 474 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
475 "reserved bits\n");
476 inject_gp(vcpu);
477 return;
478 }
479
480 }
481
482 kvm_arch_ops->set_cr0(vcpu, cr0);
483 vcpu->cr0 = cr0;
484
485 spin_lock(&vcpu->kvm->lock);
486 kvm_mmu_reset_context(vcpu);
487 spin_unlock(&vcpu->kvm->lock);
488 return;
489}
490EXPORT_SYMBOL_GPL(set_cr0);
491
492void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
493{
399badf3 494 kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu);
6aa8b732
AK		 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{
501 if (cr4 & CR4_RESEVED_BITS) {
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)) {
6aa8b732
AK		 508 if (!(cr4 & CR4_PAE_MASK)) {
509 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
510 "in long mode\n");
511 inject_gp(vcpu);
512 return;
513 }
514 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & CR4_PAE_MASK)
1342d353 515 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 516 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
517 inject_gp(vcpu);
518 }
519
520 if (cr4 & CR4_VMXE_MASK) {
521 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
522 inject_gp(vcpu);
523 return;
524 }
525 kvm_arch_ops->set_cr4(vcpu, cr4);
526 spin_lock(&vcpu->kvm->lock);
527 kvm_mmu_reset_context(vcpu);
528 spin_unlock(&vcpu->kvm->lock);
529}
530EXPORT_SYMBOL_GPL(set_cr4);
531
532void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
533{
a9058ecd 534 if (is_long_mode(vcpu)) {
d27d4aca 535 if (cr3 & CR3_L_MODE_RESEVED_BITS) {
6aa8b732
AK		 536 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
537 inject_gp(vcpu);
538 return;
539 }
540 } else {
541 if (cr3 & CR3_RESEVED_BITS) {
542 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
543 inject_gp(vcpu);
544 return;
545 }
546 if (is_paging(vcpu) && is_pae(vcpu) &&
1342d353 547 !load_pdptrs(vcpu, cr3)) {
6aa8b732
AK		 548 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
549 "reserved bits\n");
550 inject_gp(vcpu);
551 return;
552 }
553 }
554
555 vcpu->cr3 = cr3;
556 spin_lock(&vcpu->kvm->lock);
d21225ee
IM		 557 /*
558 * Does the new cr3 value map to physical memory? (Note, we
559 * catch an invalid cr3 even in real-mode, because it would
560 * cause trouble later on when we turn on paging anyway.)
561 *
562 * A real CPU would silently accept an invalid cr3 and would
563 * attempt to use it - with largely undefined (and often hard
564 * to debug) behavior on the guest side.
565 */
566 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
567 inject_gp(vcpu);
568 else
569 vcpu->mmu.new_cr3(vcpu);
6aa8b732
AK		 570 spin_unlock(&vcpu->kvm->lock);
571}
572EXPORT_SYMBOL_GPL(set_cr3);
573
574void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
575{
576 if ( cr8 & CR8_RESEVED_BITS) {
577 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
578 inject_gp(vcpu);
579 return;
580 }
581 vcpu->cr8 = cr8;
582}
583EXPORT_SYMBOL_GPL(set_cr8);
584
585void fx_init(struct kvm_vcpu *vcpu)
586{
587 struct __attribute__ ((__packed__)) fx_image_s {
588 u16 control; //fcw
589 u16 status; //fsw
590 u16 tag; // ftw
591 u16 opcode; //fop
592 u64 ip; // fpu ip
593 u64 operand;// fpu dp
594 u32 mxcsr;
595 u32 mxcsr_mask;
596
597 } *fx_image;
598
599 fx_save(vcpu->host_fx_image);
600 fpu_init();
601 fx_save(vcpu->guest_fx_image);
602 fx_restore(vcpu->host_fx_image);
603
604 fx_image = (struct fx_image_s *)vcpu->guest_fx_image;
605 fx_image->mxcsr = 0x1f80;
606 memset(vcpu->guest_fx_image + sizeof(struct fx_image_s),
607 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s));
608}
609EXPORT_SYMBOL_GPL(fx_init);
610
6aa8b732
AK		 611/*
612 * Allocate some memory and give it an address in the guest physical address
613 * space.
614 *
615 * Discontiguous memory is allowed, mostly for framebuffers.
616 */
2c6f5df9
AK		 617static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
618 struct kvm_memory_region *mem)
6aa8b732
AK		 619{
620 int r;
621 gfn_t base_gfn;
622 unsigned long npages;
623 unsigned long i;
624 struct kvm_memory_slot *memslot;
625 struct kvm_memory_slot old, new;
626 int memory_config_version;
627
628 r = -EINVAL;
629 /* General sanity checks */
630 if (mem->memory_size & (PAGE_SIZE - 1))
631 goto out;
632 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
633 goto out;
634 if (mem->slot >= KVM_MEMORY_SLOTS)
635 goto out;
636 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
637 goto out;
638
639 memslot = &kvm->memslots[mem->slot];
640 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
641 npages = mem->memory_size >> PAGE_SHIFT;
642
643 if (!npages)
644 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
645
646raced:
647 spin_lock(&kvm->lock);
648
649 memory_config_version = kvm->memory_config_version;
650 new = old = *memslot;
651
652 new.base_gfn = base_gfn;
653 new.npages = npages;
654 new.flags = mem->flags;
655
656 /* Disallow changing a memory slot's size. */
657 r = -EINVAL;
658 if (npages && old.npages && npages != old.npages)
659 goto out_unlock;
660
661 /* Check for overlaps */
662 r = -EEXIST;
663 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
664 struct kvm_memory_slot *s = &kvm->memslots[i];
665
666 if (s == memslot)
667 continue;
668 if (!((base_gfn + npages <= s->base_gfn) ||
669 (base_gfn >= s->base_gfn + s->npages)))
670 goto out_unlock;
671 }
672 /*
673 * Do memory allocations outside lock. memory_config_version will
674 * detect any races.
675 */
676 spin_unlock(&kvm->lock);
677
678 /* Deallocate if slot is being removed */
679 if (!npages)
8b6d44c7 680 new.phys_mem = NULL;
6aa8b732
AK		 681
682 /* Free page dirty bitmap if unneeded */
683 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 684 new.dirty_bitmap = NULL;
6aa8b732
AK		 685
686 r = -ENOMEM;
687
688 /* Allocate if a slot is being created */
689 if (npages && !new.phys_mem) {
690 new.phys_mem = vmalloc(npages * sizeof(struct page *));
691
692 if (!new.phys_mem)
693 goto out_free;
694
695 memset(new.phys_mem, 0, npages * sizeof(struct page *));
696 for (i = 0; i < npages; ++i) {
697 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
698 | __GFP_ZERO);
699 if (!new.phys_mem[i])
700 goto out_free;
5972e953 701 set_page_private(new.phys_mem[i],0);
6aa8b732
AK		 702 }
703 }
704
705 /* Allocate page dirty bitmap if needed */
706 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
707 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
708
709 new.dirty_bitmap = vmalloc(dirty_bytes);
710 if (!new.dirty_bitmap)
711 goto out_free;
712 memset(new.dirty_bitmap, 0, dirty_bytes);
713 }
714
715 spin_lock(&kvm->lock);
716
717 if (memory_config_version != kvm->memory_config_version) {
718 spin_unlock(&kvm->lock);
719 kvm_free_physmem_slot(&new, &old);
720 goto raced;
721 }
722
723 r = -EAGAIN;
724 if (kvm->busy)
725 goto out_unlock;
726
727 if (mem->slot >= kvm->nmemslots)
728 kvm->nmemslots = mem->slot + 1;
729
730 *memslot = new;
731 ++kvm->memory_config_version;
732
733 spin_unlock(&kvm->lock);
734
735 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
736 struct kvm_vcpu *vcpu;
737
bccf2150 738 vcpu = vcpu_load_slot(kvm, i);
6aa8b732
AK		 739 if (!vcpu)
740 continue;
741 kvm_mmu_reset_context(vcpu);
742 vcpu_put(vcpu);
743 }
744
745 kvm_free_physmem_slot(&old, &new);
746 return 0;
747
748out_unlock:
749 spin_unlock(&kvm->lock);
750out_free:
751 kvm_free_physmem_slot(&new, &old);
752out:
753 return r;
754}
755
714b93da
AK		 756static void do_remove_write_access(struct kvm_vcpu *vcpu, int slot)
757{
758 spin_lock(&vcpu->kvm->lock);
759 kvm_mmu_slot_remove_write_access(vcpu, slot);
760 spin_unlock(&vcpu->kvm->lock);
761}
762
6aa8b732
AK		 763/*
764 * Get (and clear) the dirty memory log for a memory slot.
765 */
2c6f5df9
AK		 766static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
767 struct kvm_dirty_log *log)
6aa8b732
AK		 768{
769 struct kvm_memory_slot *memslot;
770 int r, i;
771 int n;
714b93da 772 int cleared;
6aa8b732
AK		 773 unsigned long any = 0;
774
775 spin_lock(&kvm->lock);
776
777 /*
778 * Prevent changes to guest memory configuration even while the lock
779 * is not taken.
780 */
781 ++kvm->busy;
782 spin_unlock(&kvm->lock);
783 r = -EINVAL;
784 if (log->slot >= KVM_MEMORY_SLOTS)
785 goto out;
786
787 memslot = &kvm->memslots[log->slot];
788 r = -ENOENT;
789 if (!memslot->dirty_bitmap)
790 goto out;
791
792 n = ALIGN(memslot->npages, 8) / 8;
793
794 for (i = 0; !any && i < n; ++i)
795 any = memslot->dirty_bitmap[i];
796
797 r = -EFAULT;
798 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
799 goto out;
800
6aa8b732 801 if (any) {
714b93da 802 cleared = 0;
6aa8b732 803 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
bccf2150 804 struct kvm_vcpu *vcpu;
6aa8b732 805
bccf2150 806 vcpu = vcpu_load_slot(kvm, i);
6aa8b732
AK		 807 if (!vcpu)
808 continue;
714b93da
AK		 809 if (!cleared) {
810 do_remove_write_access(vcpu, log->slot);
811 memset(memslot->dirty_bitmap, 0, n);
812 cleared = 1;
813 }
6aa8b732
AK		 814 kvm_arch_ops->tlb_flush(vcpu);
815 vcpu_put(vcpu);
816 }
817 }
818
819 r = 0;
820
821out:
822 spin_lock(&kvm->lock);
823 --kvm->busy;
824 spin_unlock(&kvm->lock);
825 return r;
826}
827
828struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
829{
830 int i;
831
832 for (i = 0; i < kvm->nmemslots; ++i) {
833 struct kvm_memory_slot *memslot = &kvm->memslots[i];
834
835 if (gfn >= memslot->base_gfn
836 && gfn < memslot->base_gfn + memslot->npages)
837 return memslot;
838 }
8b6d44c7 839 return NULL;
6aa8b732
AK		 840}
841EXPORT_SYMBOL_GPL(gfn_to_memslot);
842
843void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
844{
845 int i;
8b6d44c7 846 struct kvm_memory_slot *memslot = NULL;
6aa8b732
AK		 847 unsigned long rel_gfn;
848
849 for (i = 0; i < kvm->nmemslots; ++i) {
850 memslot = &kvm->memslots[i];
851
852 if (gfn >= memslot->base_gfn
853 && gfn < memslot->base_gfn + memslot->npages) {
854
855 if (!memslot || !memslot->dirty_bitmap)
856 return;
857
858 rel_gfn = gfn - memslot->base_gfn;
859
860 /* avoid RMW */
861 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
862 set_bit(rel_gfn, memslot->dirty_bitmap);
863 return;
864 }
865 }
866}
867
868static int emulator_read_std(unsigned long addr,
869 unsigned long *val,
870 unsigned int bytes,
871 struct x86_emulate_ctxt *ctxt)
872{
873 struct kvm_vcpu *vcpu = ctxt->vcpu;
874 void *data = val;
875
876 while (bytes) {
877 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
878 unsigned offset = addr & (PAGE_SIZE-1);
879 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
880 unsigned long pfn;
881 struct kvm_memory_slot *memslot;
882 void *page;
883
884 if (gpa == UNMAPPED_GVA)
885 return X86EMUL_PROPAGATE_FAULT;
886 pfn = gpa >> PAGE_SHIFT;
887 memslot = gfn_to_memslot(vcpu->kvm, pfn);
888 if (!memslot)
889 return X86EMUL_UNHANDLEABLE;
890 page = kmap_atomic(gfn_to_page(memslot, pfn), KM_USER0);
891
892 memcpy(data, page + offset, tocopy);
893
894 kunmap_atomic(page, KM_USER0);
895
896 bytes -= tocopy;
897 data += tocopy;
898 addr += tocopy;
899 }
900
901 return X86EMUL_CONTINUE;
902}
903
904static int emulator_write_std(unsigned long addr,
905 unsigned long val,
906 unsigned int bytes,
907 struct x86_emulate_ctxt *ctxt)
908{
909 printk(KERN_ERR "emulator_write_std: addr %lx n %d\n",
910 addr, bytes);
911 return X86EMUL_UNHANDLEABLE;
912}
913
914static int emulator_read_emulated(unsigned long addr,
915 unsigned long *val,
916 unsigned int bytes,
917 struct x86_emulate_ctxt *ctxt)
918{
919 struct kvm_vcpu *vcpu = ctxt->vcpu;
920
921 if (vcpu->mmio_read_completed) {
922 memcpy(val, vcpu->mmio_data, bytes);
923 vcpu->mmio_read_completed = 0;
924 return X86EMUL_CONTINUE;
925 } else if (emulator_read_std(addr, val, bytes, ctxt)
926 == X86EMUL_CONTINUE)
927 return X86EMUL_CONTINUE;
928 else {
929 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
d27d4aca 930
6aa8b732 931 if (gpa == UNMAPPED_GVA)
d27d4aca 932 return X86EMUL_PROPAGATE_FAULT;
6aa8b732
AK		 933 vcpu->mmio_needed = 1;
934 vcpu->mmio_phys_addr = gpa;
935 vcpu->mmio_size = bytes;
936 vcpu->mmio_is_write = 0;
937
938 return X86EMUL_UNHANDLEABLE;
939 }
940}
941
da4a00f0
AK		 942static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
943 unsigned long val, int bytes)
944{
945 struct kvm_memory_slot *m;
946 struct page *page;
947 void *virt;
948
949 if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
950 return 0;
951 m = gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT);
952 if (!m)
953 return 0;
954 page = gfn_to_page(m, gpa >> PAGE_SHIFT);
955 kvm_mmu_pre_write(vcpu, gpa, bytes);
956 virt = kmap_atomic(page, KM_USER0);
957 memcpy(virt + offset_in_page(gpa), &val, bytes);
958 kunmap_atomic(virt, KM_USER0);
959 kvm_mmu_post_write(vcpu, gpa, bytes);
960 return 1;
961}
962
6aa8b732
AK		 963static int emulator_write_emulated(unsigned long addr,
964 unsigned long val,
965 unsigned int bytes,
966 struct x86_emulate_ctxt *ctxt)
967{
968 struct kvm_vcpu *vcpu = ctxt->vcpu;
969 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
970
971 if (gpa == UNMAPPED_GVA)
972 return X86EMUL_PROPAGATE_FAULT;
973
da4a00f0
AK		 974 if (emulator_write_phys(vcpu, gpa, val, bytes))
975 return X86EMUL_CONTINUE;
976
6aa8b732
AK		 977 vcpu->mmio_needed = 1;
978 vcpu->mmio_phys_addr = gpa;
979 vcpu->mmio_size = bytes;
980 vcpu->mmio_is_write = 1;
981 memcpy(vcpu->mmio_data, &val, bytes);
982
983 return X86EMUL_CONTINUE;
984}
985
986static int emulator_cmpxchg_emulated(unsigned long addr,
987 unsigned long old,
988 unsigned long new,
989 unsigned int bytes,
990 struct x86_emulate_ctxt *ctxt)
991{
992 static int reported;
993
994 if (!reported) {
995 reported = 1;
996 printk(KERN_WARNING "kvm: emulating exchange as write\n");
997 }
998 return emulator_write_emulated(addr, new, bytes, ctxt);
999}
1000
32b35627
AK		 1001#ifdef CONFIG_X86_32
1002
1003static int emulator_cmpxchg8b_emulated(unsigned long addr,
1004 unsigned long old_lo,
1005 unsigned long old_hi,
1006 unsigned long new_lo,
1007 unsigned long new_hi,
1008 struct x86_emulate_ctxt *ctxt)
1009{
1010 static int reported;
1011 int r;
1012
1013 if (!reported) {
1014 reported = 1;
1015 printk(KERN_WARNING "kvm: emulating exchange8b as write\n");
1016 }
1017 r = emulator_write_emulated(addr, new_lo, 4, ctxt);
1018 if (r != X86EMUL_CONTINUE)
1019 return r;
1020 return emulator_write_emulated(addr+4, new_hi, 4, ctxt);
1021}
1022
1023#endif
1024
6aa8b732
AK		 1025static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1026{
1027 return kvm_arch_ops->get_segment_base(vcpu, seg);
1028}
1029
1030int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1031{
6aa8b732
AK		 1032 return X86EMUL_CONTINUE;
1033}
1034
1035int emulate_clts(struct kvm_vcpu *vcpu)
1036{
399badf3 1037 unsigned long cr0;
6aa8b732 1038
399badf3
AK		 1039 kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu);
1040 cr0 = vcpu->cr0 & ~CR0_TS_MASK;
6aa8b732
AK		 1041 kvm_arch_ops->set_cr0(vcpu, cr0);
1042 return X86EMUL_CONTINUE;
1043}
1044
1045int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
1046{
1047 struct kvm_vcpu *vcpu = ctxt->vcpu;
1048
1049 switch (dr) {
1050 case 0 ... 3:
1051 *dest = kvm_arch_ops->get_dr(vcpu, dr);
1052 return X86EMUL_CONTINUE;
1053 default:
1054 printk(KERN_DEBUG "%s: unexpected dr %u\n",
1055 __FUNCTION__, dr);
1056 return X86EMUL_UNHANDLEABLE;
1057 }
1058}
1059
1060int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1061{
1062 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1063 int exception;
1064
1065 kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
1066 if (exception) {
1067 /* FIXME: better handling */
1068 return X86EMUL_UNHANDLEABLE;
1069 }
1070 return X86EMUL_CONTINUE;
1071}
1072
1073static void report_emulation_failure(struct x86_emulate_ctxt *ctxt)
1074{
1075 static int reported;
1076 u8 opcodes[4];
1077 unsigned long rip = ctxt->vcpu->rip;
1078 unsigned long rip_linear;
1079
1080 rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS);
1081
1082 if (reported)
1083 return;
1084
1085 emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt);
1086
1087 printk(KERN_ERR "emulation failed but !mmio_needed?"
1088 " rip %lx %02x %02x %02x %02x\n",
1089 rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
1090 reported = 1;
1091}
1092
1093struct x86_emulate_ops emulate_ops = {
1094 .read_std = emulator_read_std,
1095 .write_std = emulator_write_std,
1096 .read_emulated = emulator_read_emulated,
1097 .write_emulated = emulator_write_emulated,
1098 .cmpxchg_emulated = emulator_cmpxchg_emulated,
32b35627
AK		 1099#ifdef CONFIG_X86_32
1100 .cmpxchg8b_emulated = emulator_cmpxchg8b_emulated,
1101#endif
6aa8b732
AK		 1102};
1103
1104int emulate_instruction(struct kvm_vcpu *vcpu,
1105 struct kvm_run *run,
1106 unsigned long cr2,
1107 u16 error_code)
1108{
1109 struct x86_emulate_ctxt emulate_ctxt;
1110 int r;
1111 int cs_db, cs_l;
1112
1113 kvm_arch_ops->cache_regs(vcpu);
1114
1115 kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1116
1117 emulate_ctxt.vcpu = vcpu;
1118 emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu);
1119 emulate_ctxt.cr2 = cr2;
1120 emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM)
1121 ? X86EMUL_MODE_REAL : cs_l
1122 ? X86EMUL_MODE_PROT64 : cs_db
1123 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1124
1125 if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1126 emulate_ctxt.cs_base = 0;
1127 emulate_ctxt.ds_base = 0;
1128 emulate_ctxt.es_base = 0;
1129 emulate_ctxt.ss_base = 0;
1130 } else {
1131 emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS);
1132 emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS);
1133 emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES);
1134 emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS);
1135 }
1136
1137 emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS);
1138 emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS);
1139
1140 vcpu->mmio_is_write = 0;
1141 r = x86_emulate_memop(&emulate_ctxt, &emulate_ops);
1142
1143 if ((r || vcpu->mmio_is_write) && run) {
1144 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1145 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1146 run->mmio.len = vcpu->mmio_size;
1147 run->mmio.is_write = vcpu->mmio_is_write;
1148 }
1149
1150 if (r) {
a436036b
AK		 1151 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1152 return EMULATE_DONE;
6aa8b732
AK		 1153 if (!vcpu->mmio_needed) {
1154 report_emulation_failure(&emulate_ctxt);
1155 return EMULATE_FAIL;
1156 }
1157 return EMULATE_DO_MMIO;
1158 }
1159
1160 kvm_arch_ops->decache_regs(vcpu);
1161 kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags);
1162
1163 if (vcpu->mmio_is_write)
1164 return EMULATE_DO_MMIO;
1165
1166 return EMULATE_DONE;
1167}
1168EXPORT_SYMBOL_GPL(emulate_instruction);
1169
270fd9b9
AK		 1170int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run)
1171{
1172 unsigned long nr, a0, a1, a2, a3, a4, a5, ret;
1173
1174 kvm_arch_ops->decache_regs(vcpu);
1175 ret = -KVM_EINVAL;
1176#ifdef CONFIG_X86_64
1177 if (is_long_mode(vcpu)) {
1178 nr = vcpu->regs[VCPU_REGS_RAX];
1179 a0 = vcpu->regs[VCPU_REGS_RDI];
1180 a1 = vcpu->regs[VCPU_REGS_RSI];
1181 a2 = vcpu->regs[VCPU_REGS_RDX];
1182 a3 = vcpu->regs[VCPU_REGS_RCX];
1183 a4 = vcpu->regs[VCPU_REGS_R8];
1184 a5 = vcpu->regs[VCPU_REGS_R9];
1185 } else
1186#endif
1187 {
1188 nr = vcpu->regs[VCPU_REGS_RBX] & -1u;
1189 a0 = vcpu->regs[VCPU_REGS_RAX] & -1u;
1190 a1 = vcpu->regs[VCPU_REGS_RCX] & -1u;
1191 a2 = vcpu->regs[VCPU_REGS_RDX] & -1u;
1192 a3 = vcpu->regs[VCPU_REGS_RSI] & -1u;
1193 a4 = vcpu->regs[VCPU_REGS_RDI] & -1u;
1194 a5 = vcpu->regs[VCPU_REGS_RBP] & -1u;
1195 }
1196 switch (nr) {
1197 default:
1198 ;
1199 }
1200 vcpu->regs[VCPU_REGS_RAX] = ret;
1201 kvm_arch_ops->cache_regs(vcpu);
1202 return 1;
1203}
1204EXPORT_SYMBOL_GPL(kvm_hypercall);
1205
6aa8b732
AK		 1206static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1207{
1208 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1209}
1210
1211void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1212{
1213 struct descriptor_table dt = { limit, base };
1214
1215 kvm_arch_ops->set_gdt(vcpu, &dt);
1216}
1217
1218void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1219{
1220 struct descriptor_table dt = { limit, base };
1221
1222 kvm_arch_ops->set_idt(vcpu, &dt);
1223}
1224
1225void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1226 unsigned long *rflags)
1227{
1228 lmsw(vcpu, msw);
1229 *rflags = kvm_arch_ops->get_rflags(vcpu);
1230}
1231
1232unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1233{
399badf3 1234 kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu);
6aa8b732
AK		 1235 switch (cr) {
1236 case 0:
1237 return vcpu->cr0;
1238 case 2:
1239 return vcpu->cr2;
1240 case 3:
1241 return vcpu->cr3;
1242 case 4:
1243 return vcpu->cr4;
1244 default:
1245 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1246 return 0;
1247 }
1248}
1249
1250void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1251 unsigned long *rflags)
1252{
1253 switch (cr) {
1254 case 0:
1255 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
1256 *rflags = kvm_arch_ops->get_rflags(vcpu);
1257 break;
1258 case 2:
1259 vcpu->cr2 = val;
1260 break;
1261 case 3:
1262 set_cr3(vcpu, val);
1263 break;
1264 case 4:
1265 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1266 break;
1267 default:
1268 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1269 }
1270}
1271
102d8325
IM		 1272/*
1273 * Register the para guest with the host:
1274 */
1275static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa)
1276{
1277 struct kvm_vcpu_para_state *para_state;
1278 hpa_t para_state_hpa, hypercall_hpa;
1279 struct page *para_state_page;
1280 unsigned char *hypercall;
1281 gpa_t hypercall_gpa;
1282
1283 printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n");
1284 printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa);
1285
1286 /*
1287 * Needs to be page aligned:
1288 */
1289 if (para_state_gpa != PAGE_ALIGN(para_state_gpa))
1290 goto err_gp;
1291
1292 para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa);
1293 printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa);
1294 if (is_error_hpa(para_state_hpa))
1295 goto err_gp;
1296
1297 para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT);
1298 para_state = kmap_atomic(para_state_page, KM_USER0);
1299
1300 printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version);
1301 printk(KERN_DEBUG ".... size: %d\n", para_state->size);
1302
1303 para_state->host_version = KVM_PARA_API_VERSION;
1304 /*
1305 * We cannot support guests that try to register themselves
1306 * with a newer API version than the host supports:
1307 */
1308 if (para_state->guest_version > KVM_PARA_API_VERSION) {
1309 para_state->ret = -KVM_EINVAL;
1310 goto err_kunmap_skip;
1311 }
1312
1313 hypercall_gpa = para_state->hypercall_gpa;
1314 hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa);
1315 printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa);
1316 if (is_error_hpa(hypercall_hpa)) {
1317 para_state->ret = -KVM_EINVAL;
1318 goto err_kunmap_skip;
1319 }
1320
1321 printk(KERN_DEBUG "kvm: para guest successfully registered.\n");
1322 vcpu->para_state_page = para_state_page;
1323 vcpu->para_state_gpa = para_state_gpa;
1324 vcpu->hypercall_gpa = hypercall_gpa;
1325
1326 hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT),
1327 KM_USER1) + (hypercall_hpa & ~PAGE_MASK);
1328 kvm_arch_ops->patch_hypercall(vcpu, hypercall);
1329 kunmap_atomic(hypercall, KM_USER1);
1330
1331 para_state->ret = 0;
1332err_kunmap_skip:
1333 kunmap_atomic(para_state, KM_USER0);
1334 return 0;
1335err_gp:
1336 return 1;
1337}
1338
3bab1f5d
AK		 1339int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1340{
1341 u64 data;
1342
1343 switch (msr) {
1344 case 0xc0010010: /* SYSCFG */
1345 case 0xc0010015: /* HWCR */
1346 case MSR_IA32_PLATFORM_ID:
1347 case MSR_IA32_P5_MC_ADDR:
1348 case MSR_IA32_P5_MC_TYPE:
1349 case MSR_IA32_MC0_CTL:
1350 case MSR_IA32_MCG_STATUS:
1351 case MSR_IA32_MCG_CAP:
1352 case MSR_IA32_MC0_MISC:
1353 case MSR_IA32_MC0_MISC+4:
1354 case MSR_IA32_MC0_MISC+8:
1355 case MSR_IA32_MC0_MISC+12:
1356 case MSR_IA32_MC0_MISC+16:
1357 case MSR_IA32_UCODE_REV:
a8d13ea2 1358 case MSR_IA32_PERF_STATUS:
3bab1f5d
AK		 1359 /* MTRR registers */
1360 case 0xfe:
1361 case 0x200 ... 0x2ff:
1362 data = 0;
1363 break;
a8d13ea2
AK		 1364 case 0xcd: /* fsb frequency */
1365 data = 3;
1366 break;
3bab1f5d
AK		 1367 case MSR_IA32_APICBASE:
1368 data = vcpu->apic_base;
1369 break;
6f00e68f
AK		 1370 case MSR_IA32_MISC_ENABLE:
1371 data = vcpu->ia32_misc_enable_msr;
1372 break;
3bab1f5d
AK		 1373#ifdef CONFIG_X86_64
1374 case MSR_EFER:
1375 data = vcpu->shadow_efer;
1376 break;
1377#endif
1378 default:
1379 printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr);
1380 return 1;
1381 }
1382 *pdata = data;
1383 return 0;
1384}
1385EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1386
6aa8b732
AK		 1387/*
1388 * Reads an msr value (of 'msr_index') into 'pdata'.
1389 * Returns 0 on success, non-0 otherwise.
1390 * Assumes vcpu_load() was already called.
1391 */
1392static int get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
1393{
1394 return kvm_arch_ops->get_msr(vcpu, msr_index, pdata);
1395}
1396
05b3e0c2 1397#ifdef CONFIG_X86_64
6aa8b732 1398
3bab1f5d 1399static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1400{
6aa8b732
AK		 1401 if (efer & EFER_RESERVED_BITS) {
1402 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1403 efer);
1404 inject_gp(vcpu);
1405 return;
1406 }
1407
1408 if (is_paging(vcpu)
1409 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1410 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1411 inject_gp(vcpu);
1412 return;
1413 }
1414
7725f0ba
AK		 1415 kvm_arch_ops->set_efer(vcpu, efer);
1416
6aa8b732
AK		 1417 efer &= ~EFER_LMA;
1418 efer |= vcpu->shadow_efer & EFER_LMA;
1419
1420 vcpu->shadow_efer = efer;
6aa8b732 1421}
6aa8b732
AK		 1422
1423#endif
1424
3bab1f5d
AK		 1425int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1426{
1427 switch (msr) {
1428#ifdef CONFIG_X86_64
1429 case MSR_EFER:
1430 set_efer(vcpu, data);
1431 break;
1432#endif
1433 case MSR_IA32_MC0_STATUS:
1434 printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
1435 __FUNCTION__, data);
1436 break;
1437 case MSR_IA32_UCODE_REV:
1438 case MSR_IA32_UCODE_WRITE:
1439 case 0x200 ... 0x2ff: /* MTRRs */
1440 break;
1441 case MSR_IA32_APICBASE:
1442 vcpu->apic_base = data;
1443 break;
6f00e68f
AK		 1444 case MSR_IA32_MISC_ENABLE:
1445 vcpu->ia32_misc_enable_msr = data;
1446 break;
102d8325
IM		 1447 /*
1448 * This is the 'probe whether the host is KVM' logic:
1449 */
1450 case MSR_KVM_API_MAGIC:
1451 return vcpu_register_para(vcpu, data);
1452
3bab1f5d
AK		 1453 default:
1454 printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr);
1455 return 1;
1456 }
1457 return 0;
1458}
1459EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1460
6aa8b732
AK		 1461/*
1462 * Writes msr value into into the appropriate "register".
1463 * Returns 0 on success, non-0 otherwise.
1464 * Assumes vcpu_load() was already called.
1465 */
1466static int set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
1467{
1468 return kvm_arch_ops->set_msr(vcpu, msr_index, data);
1469}
1470
1471void kvm_resched(struct kvm_vcpu *vcpu)
1472{
1473 vcpu_put(vcpu);
1474 cond_resched();
bccf2150 1475 vcpu_load(vcpu);
6aa8b732
AK		 1476}
1477EXPORT_SYMBOL_GPL(kvm_resched);
1478
1479void load_msrs(struct vmx_msr_entry *e, int n)
1480{
1481 int i;
1482
1483 for (i = 0; i < n; ++i)
1484 wrmsrl(e[i].index, e[i].data);
1485}
1486EXPORT_SYMBOL_GPL(load_msrs);
1487
1488void save_msrs(struct vmx_msr_entry *e, int n)
1489{
1490 int i;
1491
1492 for (i = 0; i < n; ++i)
1493 rdmsrl(e[i].index, e[i].data);
1494}
1495EXPORT_SYMBOL_GPL(save_msrs);
1496
bccf2150 1497static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 1498{
6aa8b732
AK		 1499 int r;
1500
bccf2150 1501 vcpu_load(vcpu);
6aa8b732 1502
54810342
DL		 1503 /* re-sync apic's tpr */
1504 vcpu->cr8 = kvm_run->cr8;
1505
6aa8b732
AK		 1506 if (kvm_run->emulated) {
1507 kvm_arch_ops->skip_emulated_instruction(vcpu);
1508 kvm_run->emulated = 0;
1509 }
1510
1511 if (kvm_run->mmio_completed) {
1512 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
1513 vcpu->mmio_read_completed = 1;
1514 }
1515
1516 vcpu->mmio_needed = 0;
1517
1518 r = kvm_arch_ops->run(vcpu, kvm_run);
1519
1520 vcpu_put(vcpu);
1521 return r;
1522}
1523
bccf2150
AK		 1524static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
1525 struct kvm_regs *regs)
6aa8b732 1526{
bccf2150 1527 vcpu_load(vcpu);
6aa8b732
AK		 1528
1529 kvm_arch_ops->cache_regs(vcpu);
1530
1531 regs->rax = vcpu->regs[VCPU_REGS_RAX];
1532 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
1533 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
1534 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
1535 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
1536 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
1537 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
1538 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 1539#ifdef CONFIG_X86_64
6aa8b732
AK		 1540 regs->r8 = vcpu->regs[VCPU_REGS_R8];
1541 regs->r9 = vcpu->regs[VCPU_REGS_R9];
1542 regs->r10 = vcpu->regs[VCPU_REGS_R10];
1543 regs->r11 = vcpu->regs[VCPU_REGS_R11];
1544 regs->r12 = vcpu->regs[VCPU_REGS_R12];
1545 regs->r13 = vcpu->regs[VCPU_REGS_R13];
1546 regs->r14 = vcpu->regs[VCPU_REGS_R14];
1547 regs->r15 = vcpu->regs[VCPU_REGS_R15];
1548#endif
1549
1550 regs->rip = vcpu->rip;
1551 regs->rflags = kvm_arch_ops->get_rflags(vcpu);
1552
1553 /*
1554 * Don't leak debug flags in case they were set for guest debugging
1555 */
1556 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
1557 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
1558
1559 vcpu_put(vcpu);
1560
1561 return 0;
1562}
1563
bccf2150
AK		 1564static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
1565 struct kvm_regs *regs)
6aa8b732 1566{
bccf2150 1567 vcpu_load(vcpu);
6aa8b732
AK		 1568
1569 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
1570 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
1571 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
1572 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
1573 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
1574 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
1575 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
1576 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 1577#ifdef CONFIG_X86_64
6aa8b732
AK		 1578 vcpu->regs[VCPU_REGS_R8] = regs->r8;
1579 vcpu->regs[VCPU_REGS_R9] = regs->r9;
1580 vcpu->regs[VCPU_REGS_R10] = regs->r10;
1581 vcpu->regs[VCPU_REGS_R11] = regs->r11;
1582 vcpu->regs[VCPU_REGS_R12] = regs->r12;
1583 vcpu->regs[VCPU_REGS_R13] = regs->r13;
1584 vcpu->regs[VCPU_REGS_R14] = regs->r14;
1585 vcpu->regs[VCPU_REGS_R15] = regs->r15;
1586#endif
1587
1588 vcpu->rip = regs->rip;
1589 kvm_arch_ops->set_rflags(vcpu, regs->rflags);
1590
1591 kvm_arch_ops->decache_regs(vcpu);
1592
1593 vcpu_put(vcpu);
1594
1595 return 0;
1596}
1597
1598static void get_segment(struct kvm_vcpu *vcpu,
1599 struct kvm_segment *var, int seg)
1600{
1601 return kvm_arch_ops->get_segment(vcpu, var, seg);
1602}
1603
bccf2150
AK		 1604static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1605 struct kvm_sregs *sregs)
6aa8b732 1606{
6aa8b732
AK		 1607 struct descriptor_table dt;
1608
bccf2150 1609 vcpu_load(vcpu);
6aa8b732
AK		 1610
1611 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
1612 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
1613 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
1614 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
1615 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
1616 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
1617
1618 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
1619 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
1620
1621 kvm_arch_ops->get_idt(vcpu, &dt);
1622 sregs->idt.limit = dt.limit;
1623 sregs->idt.base = dt.base;
1624 kvm_arch_ops->get_gdt(vcpu, &dt);
1625 sregs->gdt.limit = dt.limit;
1626 sregs->gdt.base = dt.base;
1627
399badf3 1628 kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu);
6aa8b732
AK		 1629 sregs->cr0 = vcpu->cr0;
1630 sregs->cr2 = vcpu->cr2;
1631 sregs->cr3 = vcpu->cr3;
1632 sregs->cr4 = vcpu->cr4;
1633 sregs->cr8 = vcpu->cr8;
1634 sregs->efer = vcpu->shadow_efer;
1635 sregs->apic_base = vcpu->apic_base;
1636
1637 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
1638 sizeof sregs->interrupt_bitmap);
1639
1640 vcpu_put(vcpu);
1641
1642 return 0;
1643}
1644
1645static void set_segment(struct kvm_vcpu *vcpu,
1646 struct kvm_segment *var, int seg)
1647{
1648 return kvm_arch_ops->set_segment(vcpu, var, seg);
1649}
1650
bccf2150
AK		 1651static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1652 struct kvm_sregs *sregs)
6aa8b732 1653{
6aa8b732
AK		 1654 int mmu_reset_needed = 0;
1655 int i;
1656 struct descriptor_table dt;
1657
bccf2150 1658 vcpu_load(vcpu);
6aa8b732
AK		 1659
1660 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
1661 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
1662 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
1663 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
1664 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
1665 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
1666
1667 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
1668 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
1669
1670 dt.limit = sregs->idt.limit;
1671 dt.base = sregs->idt.base;
1672 kvm_arch_ops->set_idt(vcpu, &dt);
1673 dt.limit = sregs->gdt.limit;
1674 dt.base = sregs->gdt.base;
1675 kvm_arch_ops->set_gdt(vcpu, &dt);
1676
1677 vcpu->cr2 = sregs->cr2;
1678 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
1679 vcpu->cr3 = sregs->cr3;
1680
1681 vcpu->cr8 = sregs->cr8;
1682
1683 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 1684#ifdef CONFIG_X86_64
6aa8b732
AK		 1685 kvm_arch_ops->set_efer(vcpu, sregs->efer);
1686#endif
1687 vcpu->apic_base = sregs->apic_base;
1688
399badf3
AK		 1689 kvm_arch_ops->decache_cr0_cr4_guest_bits(vcpu);
1690
6aa8b732
AK		 1691 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
1692 kvm_arch_ops->set_cr0_no_modeswitch(vcpu, sregs->cr0);
1693
1694 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
1695 kvm_arch_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 1696 if (!is_long_mode(vcpu) && is_pae(vcpu))
1697 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 1698
1699 if (mmu_reset_needed)
1700 kvm_mmu_reset_context(vcpu);
1701
1702 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
1703 sizeof vcpu->irq_pending);
1704 vcpu->irq_summary = 0;
1705 for (i = 0; i < NR_IRQ_WORDS; ++i)
1706 if (vcpu->irq_pending[i])
1707 __set_bit(i, &vcpu->irq_summary);
1708
1709 vcpu_put(vcpu);
1710
1711 return 0;
1712}
1713
1714/*
1715 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
1716 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
bf591b24
MR		 1717 *
1718 * This list is modified at module load time to reflect the
1719 * capabilities of the host cpu.
6aa8b732
AK		 1720 */
1721static u32 msrs_to_save[] = {
1722 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
1723 MSR_K6_STAR,
05b3e0c2 1724#ifdef CONFIG_X86_64
6aa8b732
AK		 1725 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
1726#endif
1727 MSR_IA32_TIME_STAMP_COUNTER,
1728};
1729
bf591b24
MR		 1730static unsigned num_msrs_to_save;
1731
6f00e68f
AK		 1732static u32 emulated_msrs[] = {
1733 MSR_IA32_MISC_ENABLE,
1734};
1735
bf591b24
MR		 1736static __init void kvm_init_msr_list(void)
1737{
1738 u32 dummy[2];
1739 unsigned i, j;
1740
1741 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
1742 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
1743 continue;
1744 if (j < i)
1745 msrs_to_save[j] = msrs_to_save[i];
1746 j++;
1747 }
1748 num_msrs_to_save = j;
1749}
6aa8b732
AK		 1750
1751/*
1752 * Adapt set_msr() to msr_io()'s calling convention
1753 */
1754static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
1755{
1756 return set_msr(vcpu, index, *data);
1757}
1758
1759/*
1760 * Read or write a bunch of msrs. All parameters are kernel addresses.
1761 *
1762 * @return number of msrs set successfully.
1763 */
bccf2150 1764static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
6aa8b732
AK		 1765 struct kvm_msr_entry *entries,
1766 int (*do_msr)(struct kvm_vcpu *vcpu,
1767 unsigned index, u64 *data))
1768{
6aa8b732
AK		 1769 int i;
1770
bccf2150 1771 vcpu_load(vcpu);
6aa8b732
AK		 1772
1773 for (i = 0; i < msrs->nmsrs; ++i)
1774 if (do_msr(vcpu, entries[i].index, &entries[i].data))
1775 break;
1776
1777 vcpu_put(vcpu);
1778
1779 return i;
1780}
1781
1782/*
1783 * Read or write a bunch of msrs. Parameters are user addresses.
1784 *
1785 * @return number of msrs set successfully.
1786 */
bccf2150 1787static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
6aa8b732
AK		 1788 int (*do_msr)(struct kvm_vcpu *vcpu,
1789 unsigned index, u64 *data),
1790 int writeback)
1791{
1792 struct kvm_msrs msrs;
1793 struct kvm_msr_entry *entries;
1794 int r, n;
1795 unsigned size;
1796
1797 r = -EFAULT;
1798 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
1799 goto out;
1800
1801 r = -E2BIG;
1802 if (msrs.nmsrs >= MAX_IO_MSRS)
1803 goto out;
1804
1805 r = -ENOMEM;
1806 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
1807 entries = vmalloc(size);
1808 if (!entries)
1809 goto out;
1810
1811 r = -EFAULT;
1812 if (copy_from_user(entries, user_msrs->entries, size))
1813 goto out_free;
1814
bccf2150 1815 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
6aa8b732
AK		 1816 if (r < 0)
1817 goto out_free;
1818
1819 r = -EFAULT;
1820 if (writeback && copy_to_user(user_msrs->entries, entries, size))
1821 goto out_free;
1822
1823 r = n;
1824
1825out_free:
1826 vfree(entries);
1827out:
1828 return r;
1829}
1830
1831/*
1832 * Translate a guest virtual address to a guest physical address.
1833 */
bccf2150
AK		 1834static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1835 struct kvm_translation *tr)
6aa8b732
AK		 1836{
1837 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 1838 gpa_t gpa;
1839
bccf2150
AK		 1840 vcpu_load(vcpu);
1841 spin_lock(&vcpu->kvm->lock);
6aa8b732
AK		 1842 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
1843 tr->physical_address = gpa;
1844 tr->valid = gpa != UNMAPPED_GVA;
1845 tr->writeable = 1;
1846 tr->usermode = 0;
bccf2150 1847 spin_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 1848 vcpu_put(vcpu);
1849
1850 return 0;
1851}
1852
bccf2150
AK		 1853static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
1854 struct kvm_interrupt *irq)
6aa8b732 1855{
6aa8b732
AK		 1856 if (irq->irq < 0 || irq->irq >= 256)
1857 return -EINVAL;
bccf2150 1858 vcpu_load(vcpu);
6aa8b732
AK		 1859
1860 set_bit(irq->irq, vcpu->irq_pending);
1861 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
1862
1863 vcpu_put(vcpu);
1864
1865 return 0;
1866}
1867
bccf2150
AK		 1868static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
1869 struct kvm_debug_guest *dbg)
6aa8b732 1870{
6aa8b732
AK		 1871 int r;
1872
bccf2150 1873 vcpu_load(vcpu);
6aa8b732
AK		 1874
1875 r = kvm_arch_ops->set_guest_debug(vcpu, dbg);
1876
1877 vcpu_put(vcpu);
1878
1879 return r;
1880}
1881
bccf2150
AK		 1882static int kvm_vcpu_release(struct inode *inode, struct file *filp)
1883{
1884 struct kvm_vcpu *vcpu = filp->private_data;
1885
1886 fput(vcpu->kvm->filp);
1887 return 0;
1888}
1889
1890static struct file_operations kvm_vcpu_fops = {
1891 .release = kvm_vcpu_release,
1892 .unlocked_ioctl = kvm_vcpu_ioctl,
1893 .compat_ioctl = kvm_vcpu_ioctl,
1894};
1895
1896/*
1897 * Allocates an inode for the vcpu.
1898 */
1899static int create_vcpu_fd(struct kvm_vcpu *vcpu)
1900{
1901 int fd, r;
1902 struct inode *inode;
1903 struct file *file;
1904
1905 atomic_inc(&vcpu->kvm->filp->f_count);
1906 inode = kvmfs_inode(&kvm_vcpu_fops);
1907 if (IS_ERR(inode)) {
1908 r = PTR_ERR(inode);
1909 goto out1;
1910 }
1911
1912 file = kvmfs_file(inode, vcpu);
1913 if (IS_ERR(file)) {
1914 r = PTR_ERR(file);
1915 goto out2;
1916 }
1917
1918 r = get_unused_fd();
1919 if (r < 0)
1920 goto out3;
1921 fd = r;
1922 fd_install(fd, file);
1923
1924 return fd;
1925
1926out3:
1927 fput(file);
1928out2:
1929 iput(inode);
1930out1:
1931 fput(vcpu->kvm->filp);
1932 return r;
1933}
1934
c5ea7660
AK		 1935/*
1936 * Creates some virtual cpus. Good luck creating more than one.
1937 */
1938static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
1939{
1940 int r;
1941 struct kvm_vcpu *vcpu;
1942
1943 r = -EINVAL;
1944 if (!valid_vcpu(n))
1945 goto out;
1946
1947 vcpu = &kvm->vcpus[n];
1948
1949 mutex_lock(&vcpu->mutex);
1950
1951 if (vcpu->vmcs) {
1952 mutex_unlock(&vcpu->mutex);
1953 return -EEXIST;
1954 }
1955
1956 vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf,
1957 FX_IMAGE_ALIGN);
1958 vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE;
1959
1960 r = kvm_arch_ops->vcpu_create(vcpu);
1961 if (r < 0)
1962 goto out_free_vcpus;
1963
1964 r = kvm_mmu_create(vcpu);
1965 if (r < 0)
1966 goto out_free_vcpus;
1967
1968 kvm_arch_ops->vcpu_load(vcpu);
1969 r = kvm_mmu_setup(vcpu);
1970 if (r >= 0)
1971 r = kvm_arch_ops->vcpu_setup(vcpu);
1972 vcpu_put(vcpu);
1973
1974 if (r < 0)
1975 goto out_free_vcpus;
1976
bccf2150
AK		 1977 r = create_vcpu_fd(vcpu);
1978 if (r < 0)
1979 goto out_free_vcpus;
1980
1981 return r;
c5ea7660
AK		 1982
1983out_free_vcpus:
1984 kvm_free_vcpu(vcpu);
1985 mutex_unlock(&vcpu->mutex);
1986out:
1987 return r;
1988}
1989
bccf2150
AK		 1990static long kvm_vcpu_ioctl(struct file *filp,
1991 unsigned int ioctl, unsigned long arg)
6aa8b732 1992{
bccf2150 1993 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 1994 void __user *argp = (void __user *)arg;
6aa8b732
AK		 1995 int r = -EINVAL;
1996
1997 switch (ioctl) {
6aa8b732
AK		 1998 case KVM_RUN: {
1999 struct kvm_run kvm_run;
2000
2001 r = -EFAULT;
2f366987 2002 if (copy_from_user(&kvm_run, argp, sizeof kvm_run))
6aa8b732 2003 goto out;
bccf2150 2004 r = kvm_vcpu_ioctl_run(vcpu, &kvm_run);
c1150d8c 2005 if (r < 0 && r != -EINTR)
6aa8b732 2006 goto out;
2f366987 2007 if (copy_to_user(argp, &kvm_run, sizeof kvm_run)) {
c1150d8c 2008 r = -EFAULT;
6aa8b732 2009 goto out;
c1150d8c 2010 }
6aa8b732
AK		 2011 break;
2012 }
2013 case KVM_GET_REGS: {
2014 struct kvm_regs kvm_regs;
2015
bccf2150
AK		 2016 memset(&kvm_regs, 0, sizeof kvm_regs);
2017 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2018 if (r)
2019 goto out;
2020 r = -EFAULT;
2f366987 2021 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2022 goto out;
2023 r = 0;
2024 break;
2025 }
2026 case KVM_SET_REGS: {
2027 struct kvm_regs kvm_regs;
2028
2029 r = -EFAULT;
2f366987 2030 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2031 goto out;
bccf2150 2032 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2033 if (r)
2034 goto out;
2035 r = 0;
2036 break;
2037 }
2038 case KVM_GET_SREGS: {
2039 struct kvm_sregs kvm_sregs;
2040
bccf2150
AK		 2041 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2042 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2043 if (r)
2044 goto out;
2045 r = -EFAULT;
2f366987 2046 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2047 goto out;
2048 r = 0;
2049 break;
2050 }
2051 case KVM_SET_SREGS: {
2052 struct kvm_sregs kvm_sregs;
2053
2054 r = -EFAULT;
2f366987 2055 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2056 goto out;
bccf2150 2057 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2058 if (r)
2059 goto out;
2060 r = 0;
2061 break;
2062 }
2063 case KVM_TRANSLATE: {
2064 struct kvm_translation tr;
2065
2066 r = -EFAULT;
2f366987 2067 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2068 goto out;
bccf2150 2069 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2070 if (r)
2071 goto out;
2072 r = -EFAULT;
2f366987 2073 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2074 goto out;
2075 r = 0;
2076 break;
2077 }
2078 case KVM_INTERRUPT: {
2079 struct kvm_interrupt irq;
2080
2081 r = -EFAULT;
2f366987 2082 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2083 goto out;
bccf2150 2084 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2085 if (r)
2086 goto out;
2087 r = 0;
2088 break;
2089 }
2090 case KVM_DEBUG_GUEST: {
2091 struct kvm_debug_guest dbg;
2092
2093 r = -EFAULT;
2f366987 2094 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2095 goto out;
bccf2150 2096 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2097 if (r)
2098 goto out;
2099 r = 0;
2100 break;
2101 }
bccf2150
AK		 2102 case KVM_GET_MSRS:
2103 r = msr_io(vcpu, argp, get_msr, 1);
2104 break;
2105 case KVM_SET_MSRS:
2106 r = msr_io(vcpu, argp, do_set_msr, 0);
2107 break;
2108 default:
2109 ;
2110 }
2111out:
2112 return r;
2113}
2114
2115static long kvm_vm_ioctl(struct file *filp,
2116 unsigned int ioctl, unsigned long arg)
2117{
2118 struct kvm *kvm = filp->private_data;
2119 void __user *argp = (void __user *)arg;
2120 int r = -EINVAL;
2121
2122 switch (ioctl) {
2123 case KVM_CREATE_VCPU:
2124 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2125 if (r < 0)
2126 goto out;
2127 break;
6aa8b732
AK		 2128 case KVM_SET_MEMORY_REGION: {
2129 struct kvm_memory_region kvm_mem;
2130
2131 r = -EFAULT;
2f366987 2132 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 2133 goto out;
2c6f5df9 2134 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
6aa8b732
AK		 2135 if (r)
2136 goto out;
2137 break;
2138 }
2139 case KVM_GET_DIRTY_LOG: {
2140 struct kvm_dirty_log log;
2141
2142 r = -EFAULT;
2f366987 2143 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 2144 goto out;
2c6f5df9 2145 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 2146 if (r)
2147 goto out;
2148 break;
2149 }
f17abe9a
AK		 2150 default:
2151 ;
2152 }
2153out:
2154 return r;
2155}
2156
2157static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
2158 unsigned long address,
2159 int *type)
2160{
2161 struct kvm *kvm = vma->vm_file->private_data;
2162 unsigned long pgoff;
2163 struct kvm_memory_slot *slot;
2164 struct page *page;
2165
2166 *type = VM_FAULT_MINOR;
2167 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
2168 slot = gfn_to_memslot(kvm, pgoff);
2169 if (!slot)
2170 return NOPAGE_SIGBUS;
2171 page = gfn_to_page(slot, pgoff);
2172 if (!page)
2173 return NOPAGE_SIGBUS;
2174 get_page(page);
2175 return page;
2176}
2177
2178static struct vm_operations_struct kvm_vm_vm_ops = {
2179 .nopage = kvm_vm_nopage,
2180};
2181
2182static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
2183{
2184 vma->vm_ops = &kvm_vm_vm_ops;
2185 return 0;
2186}
2187
2188static struct file_operations kvm_vm_fops = {
2189 .release = kvm_vm_release,
2190 .unlocked_ioctl = kvm_vm_ioctl,
2191 .compat_ioctl = kvm_vm_ioctl,
2192 .mmap = kvm_vm_mmap,
2193};
2194
2195static int kvm_dev_ioctl_create_vm(void)
2196{
2197 int fd, r;
2198 struct inode *inode;
2199 struct file *file;
2200 struct kvm *kvm;
2201
2202 inode = kvmfs_inode(&kvm_vm_fops);
2203 if (IS_ERR(inode)) {
2204 r = PTR_ERR(inode);
2205 goto out1;
2206 }
2207
2208 kvm = kvm_create_vm();
2209 if (IS_ERR(kvm)) {
2210 r = PTR_ERR(kvm);
2211 goto out2;
2212 }
2213
2214 file = kvmfs_file(inode, kvm);
2215 if (IS_ERR(file)) {
2216 r = PTR_ERR(file);
2217 goto out3;
2218 }
bccf2150 2219 kvm->filp = file;
f17abe9a
AK		 2220
2221 r = get_unused_fd();
2222 if (r < 0)
2223 goto out4;
2224 fd = r;
2225 fd_install(fd, file);
2226
2227 return fd;
2228
2229out4:
2230 fput(file);
2231out3:
2232 kvm_destroy_vm(kvm);
2233out2:
2234 iput(inode);
2235out1:
2236 return r;
2237}
2238
2239static long kvm_dev_ioctl(struct file *filp,
2240 unsigned int ioctl, unsigned long arg)
2241{
2242 void __user *argp = (void __user *)arg;
2243 int r = -EINVAL;
2244
2245 switch (ioctl) {
2246 case KVM_GET_API_VERSION:
2247 r = KVM_API_VERSION;
2248 break;
2249 case KVM_CREATE_VM:
2250 r = kvm_dev_ioctl_create_vm();
2251 break;
6aa8b732 2252 case KVM_GET_MSR_INDEX_LIST: {
2f366987 2253 struct kvm_msr_list __user *user_msr_list = argp;
6aa8b732
AK		 2254 struct kvm_msr_list msr_list;
2255 unsigned n;
2256
2257 r = -EFAULT;
2258 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
2259 goto out;
2260 n = msr_list.nmsrs;
6f00e68f 2261 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
6aa8b732
AK		 2262 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
2263 goto out;
2264 r = -E2BIG;
bf591b24 2265 if (n < num_msrs_to_save)
6aa8b732
AK		 2266 goto out;
2267 r = -EFAULT;
2268 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
bf591b24 2269 num_msrs_to_save * sizeof(u32)))
6aa8b732 2270 goto out;
6f00e68f
AK		 2271 if (copy_to_user(user_msr_list->indices
2272 + num_msrs_to_save * sizeof(u32),
2273 &emulated_msrs,
2274 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
2275 goto out;
6aa8b732 2276 r = 0;
cc1d8955 2277 break;
6aa8b732
AK		 2278 }
2279 default:
2280 ;
2281 }
2282out:
2283 return r;
2284}
2285
6aa8b732
AK		 2286static struct file_operations kvm_chardev_ops = {
2287 .open = kvm_dev_open,
2288 .release = kvm_dev_release,
2289 .unlocked_ioctl = kvm_dev_ioctl,
2290 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 2291};
2292
2293static struct miscdevice kvm_dev = {
2294 MISC_DYNAMIC_MINOR,
2295 "kvm",
2296 &kvm_chardev_ops,
2297};
2298
2299static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
2300 void *v)
2301{
2302 if (val == SYS_RESTART) {
2303 /*
2304 * Some (well, at least mine) BIOSes hang on reboot if
2305 * in vmx root mode.
2306 */
2307 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
8b6d44c7 2308 on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1);
6aa8b732
AK		 2309 }
2310 return NOTIFY_OK;
2311}
2312
2313static struct notifier_block kvm_reboot_notifier = {
2314 .notifier_call = kvm_reboot,
2315 .priority = 0,
2316};
2317
774c47f1
AK		 2318/*
2319 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
2320 * cached on it.
2321 */
2322static void decache_vcpus_on_cpu(int cpu)
2323{
2324 struct kvm *vm;
2325 struct kvm_vcpu *vcpu;
2326 int i;
2327
2328 spin_lock(&kvm_lock);
2329 list_for_each_entry(vm, &vm_list, vm_list)
2330 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
2331 vcpu = &vm->vcpus[i];
2332 /*
2333 * If the vcpu is locked, then it is running on some
2334 * other cpu and therefore it is not cached on the
2335 * cpu in question.
2336 *
2337 * If it's not locked, check the last cpu it executed
2338 * on.
2339 */
2340 if (mutex_trylock(&vcpu->mutex)) {
2341 if (vcpu->cpu == cpu) {
2342 kvm_arch_ops->vcpu_decache(vcpu);
2343 vcpu->cpu = -1;
2344 }
2345 mutex_unlock(&vcpu->mutex);
2346 }
2347 }
2348 spin_unlock(&kvm_lock);
2349}
2350
2351static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
2352 void *v)
2353{
2354 int cpu = (long)v;
2355
2356 switch (val) {
43934a38 2357 case CPU_DOWN_PREPARE:
774c47f1 2358 case CPU_UP_CANCELED:
43934a38
JK		 2359 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
2360 cpu);
774c47f1
AK		 2361 decache_vcpus_on_cpu(cpu);
2362 smp_call_function_single(cpu, kvm_arch_ops->hardware_disable,
2363 NULL, 0, 1);
2364 break;
43934a38
JK		 2365 case CPU_ONLINE:
2366 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
2367 cpu);
774c47f1
AK		 2368 smp_call_function_single(cpu, kvm_arch_ops->hardware_enable,
2369 NULL, 0, 1);
2370 break;
2371 }
2372 return NOTIFY_OK;
2373}
2374
2375static struct notifier_block kvm_cpu_notifier = {
2376 .notifier_call = kvm_cpu_hotplug,
2377 .priority = 20, /* must be > scheduler priority */
2378};
2379
6aa8b732
AK		 2380static __init void kvm_init_debug(void)
2381{
2382 struct kvm_stats_debugfs_item *p;
2383
8b6d44c7 2384 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732
AK		 2385 for (p = debugfs_entries; p->name; ++p)
2386 p->dentry = debugfs_create_u32(p->name, 0444, debugfs_dir,
2387 p->data);
2388}
2389
2390static void kvm_exit_debug(void)
2391{
2392 struct kvm_stats_debugfs_item *p;
2393
2394 for (p = debugfs_entries; p->name; ++p)
2395 debugfs_remove(p->dentry);
2396 debugfs_remove(debugfs_dir);
2397}
2398
59ae6c6b
AK		 2399static int kvm_suspend(struct sys_device *dev, pm_message_t state)
2400{
2401 decache_vcpus_on_cpu(raw_smp_processor_id());
19d1408d 2402 on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1);
59ae6c6b
AK		 2403 return 0;
2404}
2405
2406static int kvm_resume(struct sys_device *dev)
2407{
19d1408d 2408 on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1);
59ae6c6b
AK		 2409 return 0;
2410}
2411
2412static struct sysdev_class kvm_sysdev_class = {
2413 set_kset_name("kvm"),
2414 .suspend = kvm_suspend,
2415 .resume = kvm_resume,
2416};
2417
2418static struct sys_device kvm_sysdev = {
2419 .id = 0,
2420 .cls = &kvm_sysdev_class,
2421};
2422
6aa8b732
AK		 2423hpa_t bad_page_address;
2424
37e29d90
AK		 2425static int kvmfs_get_sb(struct file_system_type *fs_type, int flags,
2426 const char *dev_name, void *data, struct vfsmount *mnt)
2427{
2428 return get_sb_pseudo(fs_type, "kvm:", NULL, KVMFS_MAGIC, mnt);
2429}
2430
2431static struct file_system_type kvm_fs_type = {
2432 .name = "kvmfs",
2433 .get_sb = kvmfs_get_sb,
2434 .kill_sb = kill_anon_super,
2435};
2436
6aa8b732
AK		 2437int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module)
2438{
2439 int r;
2440
09db28b8
YI		 2441 if (kvm_arch_ops) {
2442 printk(KERN_ERR "kvm: already loaded the other module\n");
2443 return -EEXIST;
2444 }
2445
e097f35c 2446 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 2447 printk(KERN_ERR "kvm: no hardware support\n");
2448 return -EOPNOTSUPP;
2449 }
e097f35c 2450 if (ops->disabled_by_bios()) {
6aa8b732
AK		 2451 printk(KERN_ERR "kvm: disabled by bios\n");
2452 return -EOPNOTSUPP;
2453 }
2454
e097f35c
YI		 2455 kvm_arch_ops = ops;
2456
6aa8b732
AK		 2457 r = kvm_arch_ops->hardware_setup();
2458 if (r < 0)
2459 return r;
2460
8b6d44c7 2461 on_each_cpu(kvm_arch_ops->hardware_enable, NULL, 0, 1);
774c47f1
AK		 2462 r = register_cpu_notifier(&kvm_cpu_notifier);
2463 if (r)
2464 goto out_free_1;
6aa8b732
AK		 2465 register_reboot_notifier(&kvm_reboot_notifier);
2466
59ae6c6b
AK		 2467 r = sysdev_class_register(&kvm_sysdev_class);
2468 if (r)
2469 goto out_free_2;
2470
2471 r = sysdev_register(&kvm_sysdev);
2472 if (r)
2473 goto out_free_3;
2474
6aa8b732
AK		 2475 kvm_chardev_ops.owner = module;
2476
2477 r = misc_register(&kvm_dev);
2478 if (r) {
2479 printk (KERN_ERR "kvm: misc device register failed\n");
2480 goto out_free;
2481 }
2482
2483 return r;
2484
2485out_free:
59ae6c6b
AK		 2486 sysdev_unregister(&kvm_sysdev);
2487out_free_3:
2488 sysdev_class_unregister(&kvm_sysdev_class);
2489out_free_2:
6aa8b732 2490 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 2491 unregister_cpu_notifier(&kvm_cpu_notifier);
2492out_free_1:
8b6d44c7 2493 on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1);
6aa8b732
AK		 2494 kvm_arch_ops->hardware_unsetup();
2495 return r;
2496}
2497
2498void kvm_exit_arch(void)
2499{
2500 misc_deregister(&kvm_dev);
59ae6c6b
AK		 2501 sysdev_unregister(&kvm_sysdev);
2502 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 2503 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 2504 unregister_cpu_notifier(&kvm_cpu_notifier);
8b6d44c7 2505 on_each_cpu(kvm_arch_ops->hardware_disable, NULL, 0, 1);
6aa8b732 2506 kvm_arch_ops->hardware_unsetup();
09db28b8 2507 kvm_arch_ops = NULL;
6aa8b732
AK		 2508}
2509
2510static __init int kvm_init(void)
2511{
2512 static struct page *bad_page;
37e29d90
AK		 2513 int r;
2514
2515 r = register_filesystem(&kvm_fs_type);
2516 if (r)
2517 goto out3;
6aa8b732 2518
37e29d90
AK		 2519 kvmfs_mnt = kern_mount(&kvm_fs_type);
2520 r = PTR_ERR(kvmfs_mnt);
2521 if (IS_ERR(kvmfs_mnt))
2522 goto out2;
6aa8b732
AK		 2523 kvm_init_debug();
2524
bf591b24
MR		 2525 kvm_init_msr_list();
2526
6aa8b732
AK		 2527 if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
2528 r = -ENOMEM;
2529 goto out;
2530 }
2531
2532 bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
2533 memset(__va(bad_page_address), 0, PAGE_SIZE);
2534
2535 return r;
2536
2537out:
2538 kvm_exit_debug();
37e29d90
AK		 2539 mntput(kvmfs_mnt);
2540out2:
2541 unregister_filesystem(&kvm_fs_type);
2542out3:
6aa8b732
AK		 2543 return r;
2544}
2545
2546static __exit void kvm_exit(void)
2547{
2548 kvm_exit_debug();
2549 __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
37e29d90
AK		 2550 mntput(kvmfs_mnt);
2551 unregister_filesystem(&kvm_fs_type);
6aa8b732
AK		 2552}
2553
2554module_init(kvm_init)
2555module_exit(kvm_exit)
2556
2557EXPORT_SYMBOL_GPL(kvm_init_arch);
2558EXPORT_SYMBOL_GPL(kvm_exit_arch);
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