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Avi Kivity6aa8b732006-12-10 02:21:36 -08001#ifndef __KVM_H
2#define __KVM_H
3
4/*
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
7 */
8
9#include <linux/types.h>
10#include <linux/list.h>
11#include <linux/mutex.h>
12#include <linux/spinlock.h>
Markus Rechberger06ff0d32007-05-27 10:46:52 +030013#include <linux/signal.h>
14#include <linux/sched.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080015#include <linux/mm.h>
Avi Kivity15ad7142007-07-11 18:17:21 +030016#include <linux/preempt.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040017#include <asm/signal.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080018
Avi Kivity6aa8b732006-12-10 02:21:36 -080019#include <linux/kvm.h>
Ingo Molnar102d8322007-02-19 14:37:47 +020020#include <linux/kvm_para.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080021
Rusty Russellf802a302007-07-17 23:32:55 +100022#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
23#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
24#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
Avi Kivity6aa8b732006-12-10 02:21:36 -080025
Avi Kivity6aa8b732006-12-10 02:21:36 -080026#define KVM_GUEST_CR0_MASK \
Rusty Russell707d92f2007-07-17 23:19:08 +100027 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
28 | X86_CR0_NW | X86_CR0_CD)
Avi Kivity6aa8b732006-12-10 02:21:36 -080029#define KVM_VM_CR0_ALWAYS_ON \
Rusty Russell707d92f2007-07-17 23:19:08 +100030 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
31 | X86_CR0_MP)
Avi Kivity6aa8b732006-12-10 02:21:36 -080032#define KVM_GUEST_CR4_MASK \
Rusty Russell66aee912007-07-17 23:34:16 +100033 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
34#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
35#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
Avi Kivity6aa8b732006-12-10 02:21:36 -080036
37#define INVALID_PAGE (~(hpa_t)0)
38#define UNMAPPED_GVA (~(gpa_t)0)
39
Avi Kivityef9254d2007-06-05 14:37:09 +030040#define KVM_MAX_VCPUS 4
Avi Kivitye8207542007-03-30 16:54:30 +030041#define KVM_ALIAS_SLOTS 4
Izik Eidus2e2c6182007-08-20 18:11:00 +030042#define KVM_MEMORY_SLOTS 8
Avi Kivity7494c0c2007-05-01 18:24:38 +030043#define KVM_NUM_MMU_PAGES 1024
Avi Kivityebeace82007-01-05 16:36:47 -080044#define KVM_MIN_FREE_MMU_PAGES 5
45#define KVM_REFILL_PAGES 25
Avi Kivity06465c52007-02-28 20:46:53 +020046#define KVM_MAX_CPUID_ENTRIES 40
Avi Kivity6aa8b732006-12-10 02:21:36 -080047
Avi Kivity6aa8b732006-12-10 02:21:36 -080048#define DE_VECTOR 0
Anthony Liguori7807fa62007-04-23 09:17:21 -050049#define NM_VECTOR 7
Avi Kivity6aa8b732006-12-10 02:21:36 -080050#define DF_VECTOR 8
51#define TS_VECTOR 10
52#define NP_VECTOR 11
53#define SS_VECTOR 12
54#define GP_VECTOR 13
55#define PF_VECTOR 14
56
57#define SELECTOR_TI_MASK (1 << 2)
58#define SELECTOR_RPL_MASK 0x03
59
60#define IOPL_SHIFT 12
61
Avi Kivity039576c2007-03-20 12:46:50 +020062#define KVM_PIO_PAGE_OFFSET 1
63
Avi Kivity6aa8b732006-12-10 02:21:36 -080064/*
Avi Kivityd9e368d2007-06-07 19:18:30 +030065 * vcpu->requests bit members
66 */
67#define KVM_TLB_FLUSH 0
68
69/*
Avi Kivity6aa8b732006-12-10 02:21:36 -080070 * Address types:
71 *
72 * gva - guest virtual address
73 * gpa - guest physical address
74 * gfn - guest frame number
75 * hva - host virtual address
76 * hpa - host physical address
77 * hfn - host frame number
78 */
79
80typedef unsigned long gva_t;
81typedef u64 gpa_t;
82typedef unsigned long gfn_t;
83
84typedef unsigned long hva_t;
85typedef u64 hpa_t;
86typedef unsigned long hfn_t;
87
Avi Kivitycea0f0e2007-01-05 16:36:43 -080088#define NR_PTE_CHAIN_ENTRIES 5
89
90struct kvm_pte_chain {
91 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
92 struct hlist_node link;
93};
94
95/*
96 * kvm_mmu_page_role, below, is defined as:
97 *
98 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
99 * bits 4:7 - page table level for this shadow (1-4)
100 * bits 8:9 - page table quadrant for 2-level guests
101 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
Avi Kivityd55e2cb2007-07-10 17:50:55 +0300102 * bits 17:19 - "access" - the user, writable, and nx bits of a huge page pde
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800103 */
104union kvm_mmu_page_role {
105 unsigned word;
106 struct {
107 unsigned glevels : 4;
108 unsigned level : 4;
109 unsigned quadrant : 2;
110 unsigned pad_for_nice_hex_output : 6;
111 unsigned metaphysical : 1;
Avi Kivityd55e2cb2007-07-10 17:50:55 +0300112 unsigned hugepage_access : 3;
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800113 };
114};
115
Avi Kivity6aa8b732006-12-10 02:21:36 -0800116struct kvm_mmu_page {
117 struct list_head link;
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800118 struct hlist_node hash_link;
119
120 /*
121 * The following two entries are used to key the shadow page in the
122 * hash table.
123 */
124 gfn_t gfn;
125 union kvm_mmu_page_role role;
126
Avi Kivity47ad8e62007-05-06 15:50:58 +0300127 u64 *spt;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800128 unsigned long slot_bitmap; /* One bit set per slot which has memory
129 * in this shadow page.
130 */
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800131 int multimapped; /* More than one parent_pte? */
Avi Kivity3bb65a22007-01-05 16:36:51 -0800132 int root_count; /* Currently serving as active root */
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800133 union {
134 u64 *parent_pte; /* !multimapped */
135 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
136 };
Avi Kivity6aa8b732006-12-10 02:21:36 -0800137};
138
Avi Kivity6aa8b732006-12-10 02:21:36 -0800139struct kvm_vcpu;
Rusty Russellc16f8622007-07-30 21:12:19 +1000140extern struct kmem_cache *kvm_vcpu_cache;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800141
142/*
143 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
144 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
145 * mode.
146 */
147struct kvm_mmu {
148 void (*new_cr3)(struct kvm_vcpu *vcpu);
149 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800150 void (*free)(struct kvm_vcpu *vcpu);
151 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
152 hpa_t root_hpa;
153 int root_level;
154 int shadow_root_level;
Avi Kivity17ac10a2007-01-05 16:36:40 -0800155
156 u64 *pae_root;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800157};
158
Avi Kivity714b93d2007-01-05 16:36:53 -0800159#define KVM_NR_MEM_OBJS 20
160
161struct kvm_mmu_memory_cache {
162 int nobjs;
163 void *objects[KVM_NR_MEM_OBJS];
164};
165
166/*
167 * We don't want allocation failures within the mmu code, so we preallocate
168 * enough memory for a single page fault in a cache.
169 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800170struct kvm_guest_debug {
171 int enabled;
172 unsigned long bp[4];
173 int singlestep;
174};
175
176enum {
177 VCPU_REGS_RAX = 0,
178 VCPU_REGS_RCX = 1,
179 VCPU_REGS_RDX = 2,
180 VCPU_REGS_RBX = 3,
181 VCPU_REGS_RSP = 4,
182 VCPU_REGS_RBP = 5,
183 VCPU_REGS_RSI = 6,
184 VCPU_REGS_RDI = 7,
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800185#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800186 VCPU_REGS_R8 = 8,
187 VCPU_REGS_R9 = 9,
188 VCPU_REGS_R10 = 10,
189 VCPU_REGS_R11 = 11,
190 VCPU_REGS_R12 = 12,
191 VCPU_REGS_R13 = 13,
192 VCPU_REGS_R14 = 14,
193 VCPU_REGS_R15 = 15,
194#endif
195 NR_VCPU_REGS
196};
197
198enum {
199 VCPU_SREG_CS,
200 VCPU_SREG_DS,
201 VCPU_SREG_ES,
202 VCPU_SREG_FS,
203 VCPU_SREG_GS,
204 VCPU_SREG_SS,
205 VCPU_SREG_TR,
206 VCPU_SREG_LDTR,
207};
208
Avi Kivity039576c2007-03-20 12:46:50 +0200209struct kvm_pio_request {
210 unsigned long count;
211 int cur_count;
212 struct page *guest_pages[2];
213 unsigned guest_page_offset;
214 int in;
Eddie Dong74906342007-06-19 18:05:03 +0300215 int port;
Avi Kivity039576c2007-03-20 12:46:50 +0200216 int size;
217 int string;
218 int down;
219 int rep;
220};
221
Avi Kivity1165f5f2007-04-19 17:27:43 +0300222struct kvm_stat {
223 u32 pf_fixed;
224 u32 pf_guest;
225 u32 tlb_flush;
226 u32 invlpg;
227
228 u32 exits;
229 u32 io_exits;
230 u32 mmio_exits;
231 u32 signal_exits;
232 u32 irq_window_exits;
233 u32 halt_exits;
Eddie Dongb6958ce2007-07-18 12:15:21 +0300234 u32 halt_wakeup;
Avi Kivity1165f5f2007-04-19 17:27:43 +0300235 u32 request_irq_exits;
236 u32 irq_exits;
Avi Kivitye6adf282007-04-30 16:07:54 +0300237 u32 light_exits;
Eddie Dong2cc51562007-05-21 07:28:09 +0300238 u32 efer_reload;
Avi Kivity1165f5f2007-04-19 17:27:43 +0300239};
240
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400241struct kvm_io_device {
242 void (*read)(struct kvm_io_device *this,
243 gpa_t addr,
244 int len,
245 void *val);
246 void (*write)(struct kvm_io_device *this,
247 gpa_t addr,
248 int len,
249 const void *val);
250 int (*in_range)(struct kvm_io_device *this, gpa_t addr);
251 void (*destructor)(struct kvm_io_device *this);
252
253 void *private;
254};
255
256static inline void kvm_iodevice_read(struct kvm_io_device *dev,
257 gpa_t addr,
258 int len,
259 void *val)
260{
261 dev->read(dev, addr, len, val);
262}
263
264static inline void kvm_iodevice_write(struct kvm_io_device *dev,
265 gpa_t addr,
266 int len,
267 const void *val)
268{
269 dev->write(dev, addr, len, val);
270}
271
272static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
273{
274 return dev->in_range(dev, addr);
275}
276
277static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
278{
Eddie Dong74906342007-06-19 18:05:03 +0300279 if (dev->destructor)
280 dev->destructor(dev);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400281}
282
283/*
284 * It would be nice to use something smarter than a linear search, TBD...
285 * Thankfully we dont expect many devices to register (famous last words :),
286 * so until then it will suffice. At least its abstracted so we can change
287 * in one place.
288 */
289struct kvm_io_bus {
290 int dev_count;
291#define NR_IOBUS_DEVS 6
292 struct kvm_io_device *devs[NR_IOBUS_DEVS];
293};
294
295void kvm_io_bus_init(struct kvm_io_bus *bus);
296void kvm_io_bus_destroy(struct kvm_io_bus *bus);
297struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
298void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
299 struct kvm_io_device *dev);
300
Avi Kivity6aa8b732006-12-10 02:21:36 -0800301struct kvm_vcpu {
302 struct kvm *kvm;
Avi Kivity15ad7142007-07-11 18:17:21 +0300303 struct preempt_notifier preempt_notifier;
Qing Hedad37952007-07-12 12:33:56 +0300304 int vcpu_id;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800305 struct mutex mutex;
306 int cpu;
Avi Kivity0cc50642007-03-25 12:07:27 +0200307 u64 host_tsc;
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200308 struct kvm_run *run;
Dor Laorc1150d82007-01-05 16:36:24 -0800309 int interrupt_window_open;
Avi Kivityd9e368d2007-06-07 19:18:30 +0300310 int guest_mode;
311 unsigned long requests;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800312 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
Rusty Russell9eb829c2007-07-18 13:05:58 +1000313 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800314 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
315 unsigned long rip; /* needs vcpu_load_rsp_rip() */
316
317 unsigned long cr0;
318 unsigned long cr2;
319 unsigned long cr3;
Ingo Molnar102d8322007-02-19 14:37:47 +0200320 gpa_t para_state_gpa;
321 struct page *para_state_page;
322 gpa_t hypercall_gpa;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800323 unsigned long cr4;
324 unsigned long cr8;
Avi Kivity1342d352007-01-05 16:36:39 -0800325 u64 pdptrs[4]; /* pae */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800326 u64 shadow_efer;
327 u64 apic_base;
Eddie Dong97222cc2007-09-12 10:58:04 +0300328 struct kvm_lapic *apic; /* kernel irqchip context */
He, Qingc5ec1532007-09-03 17:07:41 +0300329#define VCPU_MP_STATE_RUNNABLE 0
330#define VCPU_MP_STATE_UNINITIALIZED 1
331#define VCPU_MP_STATE_INIT_RECEIVED 2
332#define VCPU_MP_STATE_SIPI_RECEIVED 3
333#define VCPU_MP_STATE_HALTED 4
334 int mp_state;
335 int sipi_vector;
Avi Kivity6f00e682007-01-26 00:56:40 -0800336 u64 ia32_misc_enable_msr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800337
Avi Kivity6aa8b732006-12-10 02:21:36 -0800338 struct kvm_mmu mmu;
339
Avi Kivity714b93d2007-01-05 16:36:53 -0800340 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
341 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
Avi Kivityd3d25b02007-05-30 12:34:53 +0300342 struct kvm_mmu_memory_cache mmu_page_cache;
343 struct kvm_mmu_memory_cache mmu_page_header_cache;
Avi Kivity714b93d2007-01-05 16:36:53 -0800344
Avi Kivity86a5ba02007-01-05 16:36:50 -0800345 gfn_t last_pt_write_gfn;
346 int last_pt_write_count;
347
Avi Kivity6aa8b732006-12-10 02:21:36 -0800348 struct kvm_guest_debug guest_debug;
349
Rusty Russellb114b082007-07-30 21:13:43 +1000350 struct i387_fxsave_struct host_fx_image;
351 struct i387_fxsave_struct guest_fx_image;
Anthony Liguori7807fa62007-04-23 09:17:21 -0500352 int fpu_active;
Avi Kivity7702fd12007-06-14 16:27:40 +0300353 int guest_fpu_loaded;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800354
355 int mmio_needed;
356 int mmio_read_completed;
357 int mmio_is_write;
358 int mmio_size;
359 unsigned char mmio_data[8];
360 gpa_t mmio_phys_addr;
Avi Kivitye7df56e2007-03-14 15:54:54 +0200361 gva_t mmio_fault_cr2;
Avi Kivity039576c2007-03-20 12:46:50 +0200362 struct kvm_pio_request pio;
363 void *pio_data;
Eddie Dongb6958ce2007-07-18 12:15:21 +0300364 wait_queue_head_t wq;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800365
Avi Kivity1961d272007-03-05 19:46:05 +0200366 int sigset_active;
367 sigset_t sigset;
368
Avi Kivity1165f5f2007-04-19 17:27:43 +0300369 struct kvm_stat stat;
370
Avi Kivity6aa8b732006-12-10 02:21:36 -0800371 struct {
372 int active;
373 u8 save_iopl;
374 struct kvm_save_segment {
375 u16 selector;
376 unsigned long base;
377 u32 limit;
378 u32 ar;
379 } tr, es, ds, fs, gs;
380 } rmode;
Avi Kivity72d6e5a2007-06-05 16:15:51 +0300381 int halt_request; /* real mode on Intel only */
Avi Kivity06465c52007-02-28 20:46:53 +0200382
383 int cpuid_nent;
384 struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
Avi Kivity6aa8b732006-12-10 02:21:36 -0800385};
386
Avi Kivitye8207542007-03-30 16:54:30 +0300387struct kvm_mem_alias {
388 gfn_t base_gfn;
389 unsigned long npages;
390 gfn_t target_gfn;
391};
392
Avi Kivity6aa8b732006-12-10 02:21:36 -0800393struct kvm_memory_slot {
394 gfn_t base_gfn;
395 unsigned long npages;
396 unsigned long flags;
397 struct page **phys_mem;
398 unsigned long *dirty_bitmap;
399};
400
401struct kvm {
Shaohua Li11ec2802007-07-23 14:51:37 +0800402 struct mutex lock; /* protects everything except vcpus */
Avi Kivitye8207542007-03-30 16:54:30 +0300403 int naliases;
404 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
Avi Kivity6aa8b732006-12-10 02:21:36 -0800405 int nmemslots;
406 struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS];
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800407 /*
408 * Hash table of struct kvm_mmu_page.
409 */
Avi Kivity6aa8b732006-12-10 02:21:36 -0800410 struct list_head active_mmu_pages;
Avi Kivityebeace82007-01-05 16:36:47 -0800411 int n_free_mmu_pages;
Avi Kivitycea0f0e2007-01-05 16:36:43 -0800412 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000413 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
Avi Kivitycd4a4e52007-01-05 16:36:38 -0800414 unsigned long rmap_overflow;
Avi Kivity133de902007-02-12 00:54:44 -0800415 struct list_head vm_list;
Avi Kivitybccf2152007-02-21 18:04:26 +0200416 struct file *filp;
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400417 struct kvm_io_bus mmio_bus;
Eddie Dong74906342007-06-19 18:05:03 +0300418 struct kvm_io_bus pio_bus;
Eddie Dong85f455f2007-07-06 12:20:49 +0300419 struct kvm_pic *vpic;
Eddie Dong1fd4f2a2007-07-18 12:03:39 +0300420 struct kvm_ioapic *vioapic;
He, Qing932f72a2007-09-03 17:01:36 +0300421 int round_robin_prev_vcpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800422};
423
Eddie Dong85f455f2007-07-06 12:20:49 +0300424static inline struct kvm_pic *pic_irqchip(struct kvm *kvm)
425{
426 return kvm->vpic;
427}
428
Eddie Dong1fd4f2a2007-07-18 12:03:39 +0300429static inline struct kvm_ioapic *ioapic_irqchip(struct kvm *kvm)
430{
431 return kvm->vioapic;
432}
433
Eddie Dong85f455f2007-07-06 12:20:49 +0300434static inline int irqchip_in_kernel(struct kvm *kvm)
435{
436 return pic_irqchip(kvm) != 0;
437}
438
Avi Kivity6aa8b732006-12-10 02:21:36 -0800439struct descriptor_table {
440 u16 limit;
441 unsigned long base;
442} __attribute__((packed));
443
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +0300444struct kvm_x86_ops {
Avi Kivity6aa8b732006-12-10 02:21:36 -0800445 int (*cpu_has_kvm_support)(void); /* __init */
446 int (*disabled_by_bios)(void); /* __init */
447 void (*hardware_enable)(void *dummy); /* __init */
448 void (*hardware_disable)(void *dummy);
Yang, Sheng002c7f72007-07-31 14:23:01 +0300449 void (*check_processor_compatibility)(void *rtn);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800450 int (*hardware_setup)(void); /* __init */
451 void (*hardware_unsetup)(void); /* __exit */
452
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000453 /* Create, but do not attach this VCPU */
454 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800455 void (*vcpu_free)(struct kvm_vcpu *vcpu);
Avi Kivity04d2cc72007-09-10 18:10:54 +0300456 void (*vcpu_reset)(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800457
Avi Kivity04d2cc72007-09-10 18:10:54 +0300458 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +0300459 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800460 void (*vcpu_put)(struct kvm_vcpu *vcpu);
Avi Kivity774c47f2007-02-12 00:54:47 -0800461 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800462
463 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
464 struct kvm_debug_guest *dbg);
Avi Kivity04d2cc72007-09-10 18:10:54 +0300465 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800466 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
467 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
468 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
469 void (*get_segment)(struct kvm_vcpu *vcpu,
470 struct kvm_segment *var, int seg);
471 void (*set_segment)(struct kvm_vcpu *vcpu,
472 struct kvm_segment *var, int seg);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800473 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
Anthony Liguori25c4c272007-04-27 09:29:21 +0300474 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800475 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800476 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
477 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
478 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
479 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
480 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
481 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
482 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
483 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
484 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
485 int *exception);
486 void (*cache_regs)(struct kvm_vcpu *vcpu);
487 void (*decache_regs)(struct kvm_vcpu *vcpu);
488 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
489 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
490
Avi Kivity6aa8b732006-12-10 02:21:36 -0800491 void (*tlb_flush)(struct kvm_vcpu *vcpu);
492 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
493 unsigned long addr, u32 err_code);
494
495 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
496
Avi Kivity04d2cc72007-09-10 18:10:54 +0300497 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
498 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800499 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
Ingo Molnar102d8322007-02-19 14:37:47 +0200500 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
501 unsigned char *hypercall_addr);
Eddie Dong2a8067f2007-08-06 16:29:07 +0300502 int (*get_irq)(struct kvm_vcpu *vcpu);
503 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
Avi Kivity04d2cc72007-09-10 18:10:54 +0300504 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
505 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
506 struct kvm_run *run);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800507};
508
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +0300509extern struct kvm_x86_ops *kvm_x86_ops;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800510
Rusty Russellf0242472007-08-01 10:48:02 +1000511/* The guest did something we don't support. */
512#define pr_unimpl(vcpu, fmt, ...) \
513 do { \
514 if (printk_ratelimit()) \
515 printk(KERN_ERR "kvm: %i: cpu%i " fmt, \
516 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \
517 } while(0)
518
Avi Kivity6aa8b732006-12-10 02:21:36 -0800519#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
520#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
521
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000522int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
523void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
524
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +0300525int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
Rusty Russellc16f8622007-07-30 21:12:19 +1000526 struct module *module);
Christian Ehrhardtcbdd1be2007-09-09 15:41:59 +0300527void kvm_exit_x86(void);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800528
Avi Kivityb5a33a72007-04-15 16:31:09 +0300529int kvm_mmu_module_init(void);
530void kvm_mmu_module_exit(void);
531
Avi Kivity6aa8b732006-12-10 02:21:36 -0800532void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
Ingo Molnar8018c272006-12-29 16:50:01 -0800533int kvm_mmu_create(struct kvm_vcpu *vcpu);
534int kvm_mmu_setup(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800535
536int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
Avi Kivity90cb0522007-07-17 13:04:56 +0300537void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
538void kvm_mmu_zap_all(struct kvm *kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800539
540hpa_t gpa_to_hpa(struct kvm_vcpu *vcpu, gpa_t gpa);
541#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
542#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
543static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
544hpa_t gva_to_hpa(struct kvm_vcpu *vcpu, gva_t gva);
Avi Kivity039576c2007-03-20 12:46:50 +0200545struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800546
Avi Kivity6aa8b732006-12-10 02:21:36 -0800547extern hpa_t bad_page_address;
548
Avi Kivity954bbbc22007-03-30 14:02:32 +0300549struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800550struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
551void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
552
553enum emulation_result {
554 EMULATE_DONE, /* no further processing */
555 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
556 EMULATE_FAIL, /* can't emulate this instruction */
557};
558
559int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
560 unsigned long cr2, u16 error_code);
Avi Kivity054b1362007-09-12 13:21:09 +0300561void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800562void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
563void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
564void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
565 unsigned long *rflags);
566
567unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
568void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
569 unsigned long *rflags);
Avi Kivity35f3f282007-07-17 14:20:30 +0300570int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
571int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800572
573struct x86_emulate_ctxt;
574
Laurent Vivier3090dd72007-08-05 10:43:32 +0300575int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
576 int size, unsigned port);
577int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
578 int size, unsigned long count, int down,
579 gva_t address, int rep, unsigned port);
Avi Kivity06465c52007-02-28 20:46:53 +0200580void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
Avi Kivityd3bef152007-06-05 15:53:05 +0300581int kvm_emulate_halt(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800582int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
583int emulate_clts(struct kvm_vcpu *vcpu);
584int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr,
585 unsigned long *dest);
586int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
587 unsigned long value);
588
589void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
590void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
591void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
592void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
Eddie Dong7017fc32007-07-18 11:34:57 +0300593unsigned long get_cr8(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800594void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
Rusty Russell1747fb72007-09-06 01:21:32 +1000595void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800596
Avi Kivity3bab1f52006-12-29 16:49:48 -0800597int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
598int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800599
600void fx_init(struct kvm_vcpu *vcpu);
601
Avi Kivity6aa8b732006-12-10 02:21:36 -0800602void kvm_resched(struct kvm_vcpu *vcpu);
Avi Kivity7702fd12007-06-14 16:27:40 +0300603void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
604void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
Avi Kivityd9e368d2007-06-07 19:18:30 +0300605void kvm_flush_remote_tlbs(struct kvm *kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800606
Laurent Viviere7d5d762007-07-30 13:41:19 +0300607int emulator_read_std(unsigned long addr,
608 void *val,
609 unsigned int bytes,
610 struct kvm_vcpu *vcpu);
611int emulator_write_emulated(unsigned long addr,
612 const void *val,
613 unsigned int bytes,
614 struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800615
616unsigned long segment_base(u16 selector);
617
Avi Kivity09072da2007-05-01 14:16:52 +0300618void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
Shaohua Life551882007-07-23 14:51:39 +0800619 const u8 *new, int bytes);
Avi Kivitya4360362007-01-05 16:36:45 -0800620int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
Avi Kivity22d95b12007-09-14 20:26:06 +0300621void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
Avi Kivity17c3ba92007-06-04 15:58:30 +0300622int kvm_mmu_load(struct kvm_vcpu *vcpu);
623void kvm_mmu_unload(struct kvm_vcpu *vcpu);
Avi Kivityebeace82007-01-05 16:36:47 -0800624
Avi Kivity270fd9b2007-02-19 14:37:47 +0200625int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run);
626
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200627static inline void kvm_guest_enter(void)
628{
629 current->flags |= PF_VCPU;
630}
631
632static inline void kvm_guest_exit(void)
633{
634 current->flags &= ~PF_VCPU;
635}
636
Avi Kivityebeace82007-01-05 16:36:47 -0800637static inline int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva,
638 u32 error_code)
639{
Avi Kivityebeace82007-01-05 16:36:47 -0800640 return vcpu->mmu.page_fault(vcpu, gva, error_code);
641}
Avi Kivityda4a00f2007-01-05 16:36:44 -0800642
Avi Kivity22d95b12007-09-14 20:26:06 +0300643static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
644{
645 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
646 __kvm_mmu_free_some_pages(vcpu);
647}
648
Avi Kivity17c3ba92007-06-04 15:58:30 +0300649static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
650{
651 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
652 return 0;
653
654 return kvm_mmu_load(vcpu);
655}
656
Avi Kivitya9058ec2006-12-29 16:49:37 -0800657static inline int is_long_mode(struct kvm_vcpu *vcpu)
658{
659#ifdef CONFIG_X86_64
660 return vcpu->shadow_efer & EFER_LME;
661#else
662 return 0;
663#endif
664}
665
Avi Kivity6aa8b732006-12-10 02:21:36 -0800666static inline int is_pae(struct kvm_vcpu *vcpu)
667{
Rusty Russell66aee912007-07-17 23:34:16 +1000668 return vcpu->cr4 & X86_CR4_PAE;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800669}
670
671static inline int is_pse(struct kvm_vcpu *vcpu)
672{
Rusty Russell66aee912007-07-17 23:34:16 +1000673 return vcpu->cr4 & X86_CR4_PSE;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800674}
675
676static inline int is_paging(struct kvm_vcpu *vcpu)
677{
Rusty Russell707d92f2007-07-17 23:19:08 +1000678 return vcpu->cr0 & X86_CR0_PG;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800679}
680
681static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot)
682{
683 return slot - kvm->memslots;
684}
685
686static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
687{
688 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
689
Markus Rechberger5972e952007-02-19 14:37:47 +0200690 return (struct kvm_mmu_page *)page_private(page);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800691}
692
693static inline u16 read_fs(void)
694{
695 u16 seg;
696 asm ("mov %%fs, %0" : "=g"(seg));
697 return seg;
698}
699
700static inline u16 read_gs(void)
701{
702 u16 seg;
703 asm ("mov %%gs, %0" : "=g"(seg));
704 return seg;
705}
706
707static inline u16 read_ldt(void)
708{
709 u16 ldt;
710 asm ("sldt %0" : "=g"(ldt));
711 return ldt;
712}
713
714static inline void load_fs(u16 sel)
715{
716 asm ("mov %0, %%fs" : : "rm"(sel));
717}
718
719static inline void load_gs(u16 sel)
720{
721 asm ("mov %0, %%gs" : : "rm"(sel));
722}
723
724#ifndef load_ldt
725static inline void load_ldt(u16 sel)
726{
S.Caglar Onura0610dd2007-02-12 00:54:34 -0800727 asm ("lldt %0" : : "rm"(sel));
Avi Kivity6aa8b732006-12-10 02:21:36 -0800728}
729#endif
730
731static inline void get_idt(struct descriptor_table *table)
732{
733 asm ("sidt %0" : "=m"(*table));
734}
735
736static inline void get_gdt(struct descriptor_table *table)
737{
738 asm ("sgdt %0" : "=m"(*table));
739}
740
741static inline unsigned long read_tr_base(void)
742{
743 u16 tr;
744 asm ("str %0" : "=g"(tr));
745 return segment_base(tr);
746}
747
Avi Kivity05b3e0c2006-12-13 00:33:45 -0800748#ifdef CONFIG_X86_64
Avi Kivity6aa8b732006-12-10 02:21:36 -0800749static inline unsigned long read_msr(unsigned long msr)
750{
751 u64 value;
752
753 rdmsrl(msr, value);
754 return value;
755}
756#endif
757
Rusty Russellb114b082007-07-30 21:13:43 +1000758static inline void fx_save(struct i387_fxsave_struct *image)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800759{
760 asm ("fxsave (%0)":: "r" (image));
761}
762
Rusty Russellb114b082007-07-30 21:13:43 +1000763static inline void fx_restore(struct i387_fxsave_struct *image)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800764{
765 asm ("fxrstor (%0)":: "r" (image));
766}
767
768static inline void fpu_init(void)
769{
770 asm ("finit");
771}
772
773static inline u32 get_rdx_init_val(void)
774{
775 return 0x600; /* P6 family */
776}
777
778#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
779#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
780#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
781#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
782#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
783#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
784#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
785#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
786#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
787
788#define MSR_IA32_TIME_STAMP_COUNTER 0x010
789
790#define TSS_IOPB_BASE_OFFSET 0x66
791#define TSS_BASE_SIZE 0x68
792#define TSS_IOPB_SIZE (65536 / 8)
793#define TSS_REDIRECTION_SIZE (256 / 8)
794#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
795
Avi Kivity6aa8b732006-12-10 02:21:36 -0800796#endif