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Vegard Nossuma656c8e2008-07-22 21:27:11 +02001/*
Carsten Otte043405e2007-10-10 17:16:19 +02002 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This header defines architecture specific interfaces, x86 version
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
8 *
9 */
10
Vegard Nossum77ef50a2008-06-18 17:08:48 +020011#ifndef ASM_X86__KVM_HOST_H
12#define ASM_X86__KVM_HOST_H
Carsten Otte043405e2007-10-10 17:16:19 +020013
Zhang Xiantao34c16ee2007-10-20 15:34:38 +080014#include <linux/types.h>
15#include <linux/mm.h>
Andrea Arcangelie930bff2008-07-25 16:24:52 +020016#include <linux/mmu_notifier.h>
Zhang Xiantao34c16ee2007-10-20 15:34:38 +080017
18#include <linux/kvm.h>
19#include <linux/kvm_para.h>
Avi Kivityedf88412007-12-16 11:02:48 +020020#include <linux/kvm_types.h>
Zhang Xiantao34c16ee2007-10-20 15:34:38 +080021
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +020022#include <asm/pvclock-abi.h>
Hollis Blancharde01a1b52007-12-03 15:30:25 -060023#include <asm/desc.h>
24
Avi Kivity69a9f692008-03-21 12:38:23 +020025#define KVM_MAX_VCPUS 16
26#define KVM_MEMORY_SLOTS 32
27/* memory slots that does not exposed to userspace */
28#define KVM_PRIVATE_MEM_SLOTS 4
29
30#define KVM_PIO_PAGE_OFFSET 1
Laurent Vivier542472b2008-05-30 16:05:55 +020031#define KVM_COALESCED_MMIO_PAGE_OFFSET 2
Avi Kivity69a9f692008-03-21 12:38:23 +020032
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080033#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
34#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
Joe Perches7d76b4d2008-03-23 01:02:34 -070035#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
36 0xFFFFFF0000000000ULL)
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080037
Joe Perches7d76b4d2008-03-23 01:02:34 -070038#define KVM_GUEST_CR0_MASK \
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080039 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
40 | X86_CR0_NW | X86_CR0_CD)
Joe Perches7d76b4d2008-03-23 01:02:34 -070041#define KVM_VM_CR0_ALWAYS_ON \
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080042 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
43 | X86_CR0_MP)
Joe Perches7d76b4d2008-03-23 01:02:34 -070044#define KVM_GUEST_CR4_MASK \
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080045 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
46#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
47#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
48
49#define INVALID_PAGE (~(hpa_t)0)
50#define UNMAPPED_GVA (~(gpa_t)0)
51
Marcelo Tosatti05da4552008-02-23 11:44:30 -030052/* shadow tables are PAE even on non-PAE hosts */
53#define KVM_HPAGE_SHIFT 21
54#define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
55#define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
56
57#define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
58
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080059#define DE_VECTOR 0
Jan Kiszka19bd8af2008-07-13 13:40:55 +020060#define DB_VECTOR 1
Jan Kiszka77ab6db2008-07-14 12:28:51 +020061#define BP_VECTOR 3
62#define OF_VECTOR 4
63#define BR_VECTOR 5
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080064#define UD_VECTOR 6
65#define NM_VECTOR 7
66#define DF_VECTOR 8
67#define TS_VECTOR 10
68#define NP_VECTOR 11
69#define SS_VECTOR 12
70#define GP_VECTOR 13
71#define PF_VECTOR 14
Jan Kiszka77ab6db2008-07-14 12:28:51 +020072#define MF_VECTOR 16
Joerg Roedel53371b52008-04-09 14:15:30 +020073#define MC_VECTOR 18
Zhang Xiantaocd6e8f82007-11-19 14:33:37 +080074
75#define SELECTOR_TI_MASK (1 << 2)
76#define SELECTOR_RPL_MASK 0x03
77
78#define IOPL_SHIFT 12
79
Zhang Xiantaod69fb812007-12-14 09:54:20 +080080#define KVM_ALIAS_SLOTS 4
81
Zhang Xiantaod657a982007-12-14 09:41:22 +080082#define KVM_PERMILLE_MMU_PAGES 20
83#define KVM_MIN_ALLOC_MMU_PAGES 64
Dong, Eddie1ae0a132008-01-07 13:20:25 +020084#define KVM_MMU_HASH_SHIFT 10
85#define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
Zhang Xiantaod657a982007-12-14 09:41:22 +080086#define KVM_MIN_FREE_MMU_PAGES 5
87#define KVM_REFILL_PAGES 25
88#define KVM_MAX_CPUID_ENTRIES 40
Avi Kivity9ba075a2008-05-26 20:06:35 +030089#define KVM_NR_VAR_MTRR 8
Zhang Xiantaod657a982007-12-14 09:41:22 +080090
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +080091extern spinlock_t kvm_lock;
92extern struct list_head vm_list;
93
Zhang Xiantaod657a982007-12-14 09:41:22 +080094struct kvm_vcpu;
95struct kvm;
96
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -030097enum kvm_reg {
Zhang Xiantao2b3ccfa2007-11-19 14:56:05 +080098 VCPU_REGS_RAX = 0,
99 VCPU_REGS_RCX = 1,
100 VCPU_REGS_RDX = 2,
101 VCPU_REGS_RBX = 3,
102 VCPU_REGS_RSP = 4,
103 VCPU_REGS_RBP = 5,
104 VCPU_REGS_RSI = 6,
105 VCPU_REGS_RDI = 7,
106#ifdef CONFIG_X86_64
107 VCPU_REGS_R8 = 8,
108 VCPU_REGS_R9 = 9,
109 VCPU_REGS_R10 = 10,
110 VCPU_REGS_R11 = 11,
111 VCPU_REGS_R12 = 12,
112 VCPU_REGS_R13 = 13,
113 VCPU_REGS_R14 = 14,
114 VCPU_REGS_R15 = 15,
115#endif
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300116 VCPU_REGS_RIP,
Zhang Xiantao2b3ccfa2007-11-19 14:56:05 +0800117 NR_VCPU_REGS
118};
119
120enum {
Zhang Xiantao2b3ccfa2007-11-19 14:56:05 +0800121 VCPU_SREG_ES,
Avi Kivity81609e32008-05-27 16:26:01 +0300122 VCPU_SREG_CS,
123 VCPU_SREG_SS,
124 VCPU_SREG_DS,
Zhang Xiantao2b3ccfa2007-11-19 14:56:05 +0800125 VCPU_SREG_FS,
126 VCPU_SREG_GS,
Zhang Xiantao2b3ccfa2007-11-19 14:56:05 +0800127 VCPU_SREG_TR,
128 VCPU_SREG_LDTR,
129};
130
Avi Kivityedf88412007-12-16 11:02:48 +0200131#include <asm/kvm_x86_emulate.h>
Zhang Xiantao2b3ccfa2007-11-19 14:56:05 +0800132
Zhang Xiantaod657a982007-12-14 09:41:22 +0800133#define KVM_NR_MEM_OBJS 40
134
Avi Kivity69a9f692008-03-21 12:38:23 +0200135struct kvm_guest_debug {
136 int enabled;
137 unsigned long bp[4];
138 int singlestep;
139};
140
Zhang Xiantaod657a982007-12-14 09:41:22 +0800141/*
142 * We don't want allocation failures within the mmu code, so we preallocate
143 * enough memory for a single page fault in a cache.
144 */
145struct kvm_mmu_memory_cache {
146 int nobjs;
147 void *objects[KVM_NR_MEM_OBJS];
148};
149
150#define NR_PTE_CHAIN_ENTRIES 5
151
152struct kvm_pte_chain {
153 u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
154 struct hlist_node link;
155};
156
157/*
158 * kvm_mmu_page_role, below, is defined as:
159 *
160 * bits 0:3 - total guest paging levels (2-4, or zero for real mode)
161 * bits 4:7 - page table level for this shadow (1-4)
162 * bits 8:9 - page table quadrant for 2-level guests
163 * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
164 * bits 17:19 - common access permissions for all ptes in this shadow page
165 */
166union kvm_mmu_page_role {
167 unsigned word;
168 struct {
Joe Perches7d76b4d2008-03-23 01:02:34 -0700169 unsigned glevels:4;
170 unsigned level:4;
171 unsigned quadrant:2;
172 unsigned pad_for_nice_hex_output:6;
173 unsigned metaphysical:1;
174 unsigned access:3;
Marcelo Tosatti2e53d632008-02-20 14:47:24 -0500175 unsigned invalid:1;
Zhang Xiantaod657a982007-12-14 09:41:22 +0800176 };
177};
178
179struct kvm_mmu_page {
180 struct list_head link;
181 struct hlist_node hash_link;
182
183 /*
184 * The following two entries are used to key the shadow page in the
185 * hash table.
186 */
187 gfn_t gfn;
188 union kvm_mmu_page_role role;
189
190 u64 *spt;
191 /* hold the gfn of each spte inside spt */
192 gfn_t *gfns;
193 unsigned long slot_bitmap; /* One bit set per slot which has memory
194 * in this shadow page.
195 */
196 int multimapped; /* More than one parent_pte? */
197 int root_count; /* Currently serving as active root */
198 union {
199 u64 *parent_pte; /* !multimapped */
200 struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
201 };
202};
203
Dave Hansen6ad18fb2008-08-11 10:01:49 -0700204struct kvm_pv_mmu_op_buffer {
205 void *ptr;
206 unsigned len;
207 unsigned processed;
208 char buf[512] __aligned(sizeof(long));
209};
210
Zhang Xiantaod657a982007-12-14 09:41:22 +0800211/*
212 * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
213 * 32-bit). The kvm_mmu structure abstracts the details of the current mmu
214 * mode.
215 */
216struct kvm_mmu {
217 void (*new_cr3)(struct kvm_vcpu *vcpu);
218 int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
219 void (*free)(struct kvm_vcpu *vcpu);
220 gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
221 void (*prefetch_page)(struct kvm_vcpu *vcpu,
222 struct kvm_mmu_page *page);
Marcelo Tosattie8bc2172008-09-23 13:18:33 -0300223 int (*sync_page)(struct kvm_vcpu *vcpu,
224 struct kvm_mmu_page *sp);
Zhang Xiantaod657a982007-12-14 09:41:22 +0800225 hpa_t root_hpa;
226 int root_level;
227 int shadow_root_level;
228
229 u64 *pae_root;
230};
231
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800232struct kvm_vcpu_arch {
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800233 u64 host_tsc;
234 int interrupt_window_open;
235 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
236 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300237 /*
238 * rip and regs accesses must go through
239 * kvm_{register,rip}_{read,write} functions.
240 */
241 unsigned long regs[NR_VCPU_REGS];
242 u32 regs_avail;
243 u32 regs_dirty;
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800244
245 unsigned long cr0;
246 unsigned long cr2;
247 unsigned long cr3;
248 unsigned long cr4;
249 unsigned long cr8;
250 u64 pdptrs[4]; /* pae */
251 u64 shadow_efer;
252 u64 apic_base;
253 struct kvm_lapic *apic; /* kernel irqchip context */
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800254 int mp_state;
255 int sipi_vector;
256 u64 ia32_misc_enable_msr;
Avi Kivityb209749f2007-10-22 16:50:39 +0200257 bool tpr_access_reporting;
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800258
259 struct kvm_mmu mmu;
Dave Hansen6ad18fb2008-08-11 10:01:49 -0700260 /* only needed in kvm_pv_mmu_op() path, but it's hot so
261 * put it here to avoid allocation */
262 struct kvm_pv_mmu_op_buffer mmu_op_buffer;
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800263
264 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
265 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
266 struct kvm_mmu_memory_cache mmu_page_cache;
267 struct kvm_mmu_memory_cache mmu_page_header_cache;
268
269 gfn_t last_pt_write_gfn;
270 int last_pt_write_count;
271 u64 *last_pte_updated;
Avi Kivity1b7fcd32008-05-15 13:51:35 +0300272 gfn_t last_pte_gfn;
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800273
Avi Kivityd7824ff2007-12-30 12:29:05 +0200274 struct {
Anthony Liguori35149e22008-04-02 14:46:56 -0500275 gfn_t gfn; /* presumed gfn during guest pte update */
276 pfn_t pfn; /* pfn corresponding to that gfn */
Marcelo Tosatti05da4552008-02-23 11:44:30 -0300277 int largepage;
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200278 unsigned long mmu_seq;
Avi Kivityd7824ff2007-12-30 12:29:05 +0200279 } update_pte;
280
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800281 struct i387_fxsave_struct host_fx_image;
282 struct i387_fxsave_struct guest_fx_image;
283
284 gva_t mmio_fault_cr2;
285 struct kvm_pio_request pio;
286 void *pio_data;
287
Avi Kivity298101d2007-11-25 13:41:11 +0200288 struct kvm_queued_exception {
289 bool pending;
290 bool has_error_code;
291 u8 nr;
292 u32 error_code;
293 } exception;
294
Avi Kivity937a7ea2008-07-03 15:17:01 +0300295 struct kvm_queued_interrupt {
296 bool pending;
297 u8 nr;
298 } interrupt;
299
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800300 struct {
301 int active;
302 u8 save_iopl;
303 struct kvm_save_segment {
304 u16 selector;
305 unsigned long base;
306 u32 limit;
307 u32 ar;
308 } tr, es, ds, fs, gs;
309 } rmode;
310 int halt_request; /* real mode on Intel only */
311
312 int cpuid_nent;
Dan Kenigsberg07716712007-11-21 17:10:04 +0200313 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800314 /* emulate context */
315
316 struct x86_emulate_ctxt emulate_ctxt;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200317
318 gpa_t time;
Gerd Hoffmann50d0a0f2008-06-03 16:17:31 +0200319 struct pvclock_vcpu_time_info hv_clock;
320 unsigned int hv_clock_tsc_khz;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200321 unsigned int time_offset;
322 struct page *time_page;
Sheng Yang3419ffc2008-05-15 09:52:48 +0800323
324 bool nmi_pending;
Avi Kivity668f6122008-07-02 09:28:55 +0300325 bool nmi_injected;
Avi Kivity9ba075a2008-05-26 20:06:35 +0300326
327 u64 mtrr[0x100];
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800328};
329
Zhang Xiantaod69fb812007-12-14 09:54:20 +0800330struct kvm_mem_alias {
331 gfn_t base_gfn;
332 unsigned long npages;
333 gfn_t target_gfn;
334};
335
336struct kvm_arch{
337 int naliases;
338 struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
Zhang Xiantaof05e70a2007-12-14 10:01:48 +0800339
340 unsigned int n_free_mmu_pages;
341 unsigned int n_requested_mmu_pages;
342 unsigned int n_alloc_mmu_pages;
343 struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
344 /*
345 * Hash table of struct kvm_mmu_page.
346 */
347 struct list_head active_mmu_pages;
Ben-Ami Yassour4d5c5d02008-07-28 19:26:26 +0300348 struct list_head assigned_dev_head;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300349 struct dmar_domain *intel_iommu_domain;
Zhang Xiantaod7deeeb2007-12-14 10:17:34 +0800350 struct kvm_pic *vpic;
351 struct kvm_ioapic *vioapic;
Sheng Yang78376992008-01-28 05:10:22 +0800352 struct kvm_pit *vpit;
Avi Kivity564f1532008-07-26 17:00:59 -0300353 struct hlist_head irq_ack_notifier_list;
Zhang Xiantaobfc6d222007-12-14 10:20:16 +0800354
355 int round_robin_prev_vcpu;
356 unsigned int tss_addr;
357 struct page *apic_access_page;
Glauber de Oliveira Costa18068522008-02-15 17:52:47 -0200358
359 gpa_t wall_clock;
Sheng Yangb7ebfb02008-04-25 21:44:52 +0800360
361 struct page *ept_identity_pagetable;
362 bool ept_identity_pagetable_done;
Zhang Xiantaod69fb812007-12-14 09:54:20 +0800363};
364
Zhang Xiantao07114562007-12-14 10:23:23 +0800365struct kvm_vm_stat {
366 u32 mmu_shadow_zapped;
367 u32 mmu_pte_write;
368 u32 mmu_pte_updated;
369 u32 mmu_pde_zapped;
370 u32 mmu_flooded;
371 u32 mmu_recycled;
Avi Kivitydfc5aa02007-12-18 19:47:18 +0200372 u32 mmu_cache_miss;
Zhang Xiantao07114562007-12-14 10:23:23 +0800373 u32 remote_tlb_flush;
Marcelo Tosatti05da4552008-02-23 11:44:30 -0300374 u32 lpages;
Zhang Xiantao07114562007-12-14 10:23:23 +0800375};
376
Zhang Xiantao77b4c252007-12-14 09:49:26 +0800377struct kvm_vcpu_stat {
378 u32 pf_fixed;
379 u32 pf_guest;
380 u32 tlb_flush;
381 u32 invlpg;
382
383 u32 exits;
384 u32 io_exits;
385 u32 mmio_exits;
386 u32 signal_exits;
387 u32 irq_window_exits;
Sheng Yangf08864b2008-05-15 18:23:25 +0800388 u32 nmi_window_exits;
Zhang Xiantao77b4c252007-12-14 09:49:26 +0800389 u32 halt_exits;
390 u32 halt_wakeup;
391 u32 request_irq_exits;
392 u32 irq_exits;
393 u32 host_state_reload;
394 u32 efer_reload;
395 u32 fpu_reload;
396 u32 insn_emulation;
397 u32 insn_emulation_fail;
Amit Shahf11c3a82008-02-21 01:00:30 +0530398 u32 hypercalls;
Avi Kivityfa89a812008-09-01 15:57:51 +0300399 u32 irq_injections;
Zhang Xiantao77b4c252007-12-14 09:49:26 +0800400};
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800401
Hollis Blancharde01a1b52007-12-03 15:30:25 -0600402struct descriptor_table {
403 u16 limit;
404 unsigned long base;
405} __attribute__((packed));
406
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800407struct kvm_x86_ops {
408 int (*cpu_has_kvm_support)(void); /* __init */
409 int (*disabled_by_bios)(void); /* __init */
410 void (*hardware_enable)(void *dummy); /* __init */
411 void (*hardware_disable)(void *dummy);
412 void (*check_processor_compatibility)(void *rtn);
413 int (*hardware_setup)(void); /* __init */
414 void (*hardware_unsetup)(void); /* __exit */
Avi Kivity774ead32007-12-26 13:57:04 +0200415 bool (*cpu_has_accelerated_tpr)(void);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800416
417 /* Create, but do not attach this VCPU */
418 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
419 void (*vcpu_free)(struct kvm_vcpu *vcpu);
420 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
421
422 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
423 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
424 void (*vcpu_put)(struct kvm_vcpu *vcpu);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800425
426 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
427 struct kvm_debug_guest *dbg);
428 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
429 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
430 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
431 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
432 void (*get_segment)(struct kvm_vcpu *vcpu,
433 struct kvm_segment *var, int seg);
Izik Eidus2e4d2652008-03-24 19:38:34 +0200434 int (*get_cpl)(struct kvm_vcpu *vcpu);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800435 void (*set_segment)(struct kvm_vcpu *vcpu,
436 struct kvm_segment *var, int seg);
437 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
438 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
439 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
440 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
441 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
442 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
443 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
444 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
445 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
446 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
447 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
448 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
449 int *exception);
Marcelo Tosatti5fdbf972008-06-27 14:58:02 -0300450 void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800451 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
452 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
453
454 void (*tlb_flush)(struct kvm_vcpu *vcpu);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800455
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800456 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
457 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
458 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
459 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
460 unsigned char *hypercall_addr);
461 int (*get_irq)(struct kvm_vcpu *vcpu);
462 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
Avi Kivity298101d2007-11-25 13:41:11 +0200463 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
464 bool has_error_code, u32 error_code);
465 bool (*exception_injected)(struct kvm_vcpu *vcpu);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800466 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
467 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
468 struct kvm_run *run);
469
470 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
Sheng Yang67253af2008-04-25 10:20:22 +0800471 int (*get_tdp_level)(void);
Zhang Xiantaoea4a5ff2007-11-19 14:40:47 +0800472};
473
Zhang Xiantao97896d02007-11-14 20:09:30 +0800474extern struct kvm_x86_ops *kvm_x86_ops;
475
Zhang Xiantao54f15852007-11-19 15:24:28 +0800476int kvm_mmu_module_init(void);
477void kvm_mmu_module_exit(void);
478
479void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
480int kvm_mmu_create(struct kvm_vcpu *vcpu);
481int kvm_mmu_setup(struct kvm_vcpu *vcpu);
482void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
Sheng Yang7b523452008-04-25 21:13:50 +0800483void kvm_mmu_set_base_ptes(u64 base_pte);
484void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
485 u64 dirty_mask, u64 nx_mask, u64 x_mask);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800486
487int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
488void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
489void kvm_mmu_zap_all(struct kvm *kvm);
Zhang Xiantao3ad82a72007-11-20 13:11:38 +0800490unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800491void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
492
Joerg Roedelcc4b6872008-02-07 13:47:43 +0100493int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
494
Marcelo Tosatti3200f402008-03-29 20:17:59 -0300495int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
Avi Kivity9f811282008-03-02 14:06:05 +0200496 const void *val, int bytes);
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -0500497int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
498 gpa_t addr, unsigned long *ret);
499
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300500int is_mmio_pfn(pfn_t pfn);
501
Marcelo Tosatti2f333bc2008-02-22 12:21:37 -0500502extern bool tdp_enabled;
Avi Kivity9f811282008-03-02 14:06:05 +0200503
Zhang Xiantao54f15852007-11-19 15:24:28 +0800504enum emulation_result {
505 EMULATE_DONE, /* no further processing */
506 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
507 EMULATE_FAIL, /* can't emulate this instruction */
508};
509
Sheng Yang571008d2008-01-02 14:49:22 +0800510#define EMULTYPE_NO_DECODE (1 << 0)
511#define EMULTYPE_TRAP_UD (1 << 1)
Zhang Xiantao54f15852007-11-19 15:24:28 +0800512int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
Sheng Yang571008d2008-01-02 14:49:22 +0800513 unsigned long cr2, u16 error_code, int emulation_type);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800514void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
515void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
516void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
517void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
518 unsigned long *rflags);
519
520unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
521void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
522 unsigned long *rflags);
Joerg Roedelf2b4b7d2008-01-31 14:57:37 +0100523void kvm_enable_efer_bits(u64);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800524int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
525int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
526
527struct x86_emulate_ctxt;
528
529int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
530 int size, unsigned port);
531int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
532 int size, unsigned long count, int down,
533 gva_t address, int rep, unsigned port);
534void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
535int kvm_emulate_halt(struct kvm_vcpu *vcpu);
536int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
537int emulate_clts(struct kvm_vcpu *vcpu);
538int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
539 unsigned long *dest);
540int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
541 unsigned long value);
542
Guillaume Thouvenin3e6e0aa2008-05-27 10:18:46 +0200543void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
544int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
545 int type_bits, int seg);
546
Izik Eidus37817f22008-03-24 23:14:53 +0200547int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
548
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200549void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
Joerg Roedel9c204562008-04-01 16:44:56 +0200550void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
551void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
552void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
Avi Kivity2d3ad1f2008-02-24 11:20:43 +0200553unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
554void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800555void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
556
557int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
558int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
559
Avi Kivity298101d2007-11-25 13:41:11 +0200560void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
561void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
Avi Kivityc3c91fe2007-11-25 14:04:58 +0200562void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
563 u32 error_code);
Avi Kivity298101d2007-11-25 13:41:11 +0200564
Sheng Yang3419ffc2008-05-15 09:52:48 +0800565void kvm_inject_nmi(struct kvm_vcpu *vcpu);
566
Zhang Xiantao54f15852007-11-19 15:24:28 +0800567void fx_init(struct kvm_vcpu *vcpu);
568
569int emulator_read_std(unsigned long addr,
570 void *val,
571 unsigned int bytes,
572 struct kvm_vcpu *vcpu);
573int emulator_write_emulated(unsigned long addr,
574 const void *val,
575 unsigned int bytes,
576 struct kvm_vcpu *vcpu);
577
578unsigned long segment_base(u16 selector);
579
Avi Kivityd835dfe2007-11-21 02:57:59 +0200580void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800581void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
582 const u8 *new, int bytes);
583int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
584void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
585int kvm_mmu_load(struct kvm_vcpu *vcpu);
586void kvm_mmu_unload(struct kvm_vcpu *vcpu);
Marcelo Tosatti0ba73cd2008-09-23 13:18:34 -0300587void kvm_mmu_sync_roots(struct kvm_vcpu *vcpu);
Zhang Xiantao54f15852007-11-19 15:24:28 +0800588
589int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
590
591int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
592
Avi Kivity30677142007-10-28 18:48:59 +0200593int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
Zhang Xiantao34c16ee2007-10-20 15:34:38 +0800594
Joerg Roedel18552672008-02-07 13:47:41 +0100595void kvm_enable_tdp(void);
Joerg Roedel5f4cb662008-07-14 20:36:36 +0200596void kvm_disable_tdp(void);
Joerg Roedel18552672008-02-07 13:47:41 +0100597
Carsten Ottea03490e2007-10-29 16:09:35 +0100598int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
Carsten Ottede7d7892007-10-30 18:44:25 +0100599int complete_pio(struct kvm_vcpu *vcpu);
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800600
601static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
602{
603 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
604
605 return (struct kvm_mmu_page *)page_private(page);
606}
607
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300608static inline u16 kvm_read_fs(void)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800609{
610 u16 seg;
611 asm("mov %%fs, %0" : "=g"(seg));
612 return seg;
613}
614
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300615static inline u16 kvm_read_gs(void)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800616{
617 u16 seg;
618 asm("mov %%gs, %0" : "=g"(seg));
619 return seg;
620}
621
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300622static inline u16 kvm_read_ldt(void)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800623{
624 u16 ldt;
625 asm("sldt %0" : "=g"(ldt));
626 return ldt;
627}
628
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300629static inline void kvm_load_fs(u16 sel)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800630{
631 asm("mov %0, %%fs" : : "rm"(sel));
632}
633
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300634static inline void kvm_load_gs(u16 sel)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800635{
636 asm("mov %0, %%gs" : : "rm"(sel));
637}
638
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300639static inline void kvm_load_ldt(u16 sel)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800640{
641 asm("lldt %0" : : "rm"(sel));
642}
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800643
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300644static inline void kvm_get_idt(struct descriptor_table *table)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800645{
646 asm("sidt %0" : "=m"(*table));
647}
648
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300649static inline void kvm_get_gdt(struct descriptor_table *table)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800650{
651 asm("sgdt %0" : "=m"(*table));
652}
653
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300654static inline unsigned long kvm_read_tr_base(void)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800655{
656 u16 tr;
657 asm("str %0" : "=g"(tr));
658 return segment_base(tr);
659}
660
661#ifdef CONFIG_X86_64
662static inline unsigned long read_msr(unsigned long msr)
663{
664 u64 value;
665
666 rdmsrl(msr, value);
667 return value;
668}
669#endif
670
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300671static inline void kvm_fx_save(struct i387_fxsave_struct *image)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800672{
673 asm("fxsave (%0)":: "r" (image));
674}
675
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300676static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800677{
678 asm("fxrstor (%0)":: "r" (image));
679}
680
Avi Kivityd6e88ae2008-07-10 16:53:33 +0300681static inline void kvm_fx_finit(void)
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800682{
683 asm("finit");
684}
685
686static inline u32 get_rdx_init_val(void)
687{
688 return 0x600; /* P6 family */
689}
690
Avi Kivityc1a5d4f2007-11-25 14:12:03 +0200691static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
692{
693 kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
694}
695
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800696#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
697#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
698#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
699#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
700#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
701#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
702#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
703#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
704#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
Sheng Yang14394422008-04-28 12:24:45 +0800705#define ASM_VMX_INVEPT ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
Sheng Yang2384d2b2008-01-17 15:14:33 +0800706#define ASM_VMX_INVVPID ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
Zhang Xiantaoec6d2732007-11-19 15:08:31 +0800707
708#define MSR_IA32_TIME_STAMP_COUNTER 0x010
709
710#define TSS_IOPB_BASE_OFFSET 0x66
711#define TSS_BASE_SIZE 0x68
712#define TSS_IOPB_SIZE (65536 / 8)
713#define TSS_REDIRECTION_SIZE (256 / 8)
Joe Perches7d76b4d2008-03-23 01:02:34 -0700714#define RMODE_TSS_SIZE \
715 (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
Hollis Blanchard53e0aa72007-12-03 16:15:26 -0600716
Izik Eidus37817f22008-03-24 23:14:53 +0200717enum {
718 TASK_SWITCH_CALL = 0,
719 TASK_SWITCH_IRET = 1,
720 TASK_SWITCH_JMP = 2,
721 TASK_SWITCH_GATE = 3,
722};
723
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300724/*
725 * Hardware virtualization extension instructions may fault if a
726 * reboot turns off virtualization while processes are running.
727 * Trap the fault and ignore the instruction if that happens.
728 */
729asmlinkage void kvm_handle_fault_on_reboot(void);
730
731#define __kvm_handle_fault_on_reboot(insn) \
732 "666: " insn "\n\t" \
Eduardo Habkost18b13e52008-08-19 20:00:08 -0300733 ".pushsection .fixup, \"ax\" \n" \
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300734 "667: \n\t" \
Avi Kivity8ceed3472008-08-14 21:25:47 +0300735 __ASM_SIZE(push) " $666b \n\t" \
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300736 "jmp kvm_handle_fault_on_reboot \n\t" \
737 ".popsection \n\t" \
738 ".pushsection __ex_table, \"a\" \n\t" \
Avi Kivity8ceed3472008-08-14 21:25:47 +0300739 _ASM_PTR " 666b, 667b \n\t" \
Avi Kivity4ecac3f2008-05-13 13:23:38 +0300740 ".popsection"
741
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200742#define KVM_ARCH_WANT_MMU_NOTIFIER
743int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
744int kvm_age_hva(struct kvm *kvm, unsigned long hva);
745
Vegard Nossum77ef50a2008-06-18 17:08:48 +0200746#endif /* ASM_X86__KVM_HOST_H */