2 * Kernel-based Virtual Machine driver for Linux
4 * This header defines architecture specific interfaces, x86 version
6 * This work is licensed under the terms of the GNU GPL, version 2. See
7 * the COPYING file in the top-level directory.
16 #include <linux/types.h>
19 #include <linux/kvm.h>
20 #include <linux/kvm_para.h>
22 #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)
26 #define KVM_GUEST_CR0_MASK \
27 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
28 | X86_CR0_NW | X86_CR0_CD)
29 #define KVM_VM_CR0_ALWAYS_ON \
30 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
32 #define KVM_GUEST_CR4_MASK \
33 (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)
37 #define INVALID_PAGE (~(hpa_t)0)
38 #define UNMAPPED_GVA (~(gpa_t)0)
50 #define SELECTOR_TI_MASK (1 << 2)
51 #define SELECTOR_RPL_MASK 0x03
55 extern spinlock_t kvm_lock;
56 extern struct list_head vm_list;
91 #include "x86_emulate.h"
96 int interrupt_window_open;
97 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
98 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
99 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
100 unsigned long rip; /* needs vcpu_load_rsp_rip() */
107 u64 pdptrs[4]; /* pae */
110 struct kvm_lapic *apic; /* kernel irqchip context */
111 #define VCPU_MP_STATE_RUNNABLE 0
112 #define VCPU_MP_STATE_UNINITIALIZED 1
113 #define VCPU_MP_STATE_INIT_RECEIVED 2
114 #define VCPU_MP_STATE_SIPI_RECEIVED 3
115 #define VCPU_MP_STATE_HALTED 4
118 u64 ia32_misc_enable_msr;
122 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
123 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
124 struct kvm_mmu_memory_cache mmu_page_cache;
125 struct kvm_mmu_memory_cache mmu_page_header_cache;
127 gfn_t last_pt_write_gfn;
128 int last_pt_write_count;
129 u64 *last_pte_updated;
132 struct i387_fxsave_struct host_fx_image;
133 struct i387_fxsave_struct guest_fx_image;
135 gva_t mmio_fault_cr2;
136 struct kvm_pio_request pio;
142 struct kvm_save_segment {
147 } tr, es, ds, fs, gs;
149 int halt_request; /* real mode on Intel only */
152 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
154 /* emulate context */
156 struct x86_emulate_ctxt emulate_ctxt;
160 int (*cpu_has_kvm_support)(void); /* __init */
161 int (*disabled_by_bios)(void); /* __init */
162 void (*hardware_enable)(void *dummy); /* __init */
163 void (*hardware_disable)(void *dummy);
164 void (*check_processor_compatibility)(void *rtn);
165 int (*hardware_setup)(void); /* __init */
166 void (*hardware_unsetup)(void); /* __exit */
168 /* Create, but do not attach this VCPU */
169 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
170 void (*vcpu_free)(struct kvm_vcpu *vcpu);
171 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
173 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
174 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
175 void (*vcpu_put)(struct kvm_vcpu *vcpu);
176 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
178 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
179 struct kvm_debug_guest *dbg);
180 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
181 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
182 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
183 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
184 void (*get_segment)(struct kvm_vcpu *vcpu,
185 struct kvm_segment *var, int seg);
186 void (*set_segment)(struct kvm_vcpu *vcpu,
187 struct kvm_segment *var, int seg);
188 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
189 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
190 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
191 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
192 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
193 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
194 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
195 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
196 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
197 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
198 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
199 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
201 void (*cache_regs)(struct kvm_vcpu *vcpu);
202 void (*decache_regs)(struct kvm_vcpu *vcpu);
203 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
204 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
206 void (*tlb_flush)(struct kvm_vcpu *vcpu);
207 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
208 unsigned long addr, u32 err_code);
210 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
212 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
213 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
214 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
215 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
216 unsigned char *hypercall_addr);
217 int (*get_irq)(struct kvm_vcpu *vcpu);
218 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
219 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
220 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
221 struct kvm_run *run);
223 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
226 extern struct kvm_x86_ops *kvm_x86_ops;
228 int kvm_mmu_module_init(void);
229 void kvm_mmu_module_exit(void);
231 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
232 int kvm_mmu_create(struct kvm_vcpu *vcpu);
233 int kvm_mmu_setup(struct kvm_vcpu *vcpu);
234 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
236 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
237 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
238 void kvm_mmu_zap_all(struct kvm *kvm);
239 unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
240 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
242 enum emulation_result {
243 EMULATE_DONE, /* no further processing */
244 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
245 EMULATE_FAIL, /* can't emulate this instruction */
248 int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
249 unsigned long cr2, u16 error_code, int no_decode);
250 void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
251 void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
252 void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
253 void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
254 unsigned long *rflags);
256 unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
257 void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
258 unsigned long *rflags);
259 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
260 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
262 struct x86_emulate_ctxt;
264 int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
265 int size, unsigned port);
266 int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
267 int size, unsigned long count, int down,
268 gva_t address, int rep, unsigned port);
269 void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
270 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
271 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
272 int emulate_clts(struct kvm_vcpu *vcpu);
273 int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
274 unsigned long *dest);
275 int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
276 unsigned long value);
278 void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
279 void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
280 void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
281 void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
282 unsigned long get_cr8(struct kvm_vcpu *vcpu);
283 void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
284 void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
286 int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
287 int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
289 void fx_init(struct kvm_vcpu *vcpu);
291 int emulator_read_std(unsigned long addr,
294 struct kvm_vcpu *vcpu);
295 int emulator_write_emulated(unsigned long addr,
298 struct kvm_vcpu *vcpu);
300 unsigned long segment_base(u16 selector);
302 void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
303 void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
304 const u8 *new, int bytes);
305 int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
306 void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
307 int kvm_mmu_load(struct kvm_vcpu *vcpu);
308 void kvm_mmu_unload(struct kvm_vcpu *vcpu);
310 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
312 int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
314 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
316 static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
318 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
319 __kvm_mmu_free_some_pages(vcpu);
322 static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
324 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
327 return kvm_mmu_load(vcpu);
330 static inline int is_long_mode(struct kvm_vcpu *vcpu)
333 return vcpu->shadow_efer & EFER_LME;
339 static inline int is_pae(struct kvm_vcpu *vcpu)
341 return vcpu->cr4 & X86_CR4_PAE;
344 static inline int is_pse(struct kvm_vcpu *vcpu)
346 return vcpu->cr4 & X86_CR4_PSE;
349 static inline int is_paging(struct kvm_vcpu *vcpu)
351 return vcpu->cr0 & X86_CR0_PG;
354 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
355 int complete_pio(struct kvm_vcpu *vcpu);
357 static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
359 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
361 return (struct kvm_mmu_page *)page_private(page);
364 static inline u16 read_fs(void)
367 asm("mov %%fs, %0" : "=g"(seg));
371 static inline u16 read_gs(void)
374 asm("mov %%gs, %0" : "=g"(seg));
378 static inline u16 read_ldt(void)
381 asm("sldt %0" : "=g"(ldt));
385 static inline void load_fs(u16 sel)
387 asm("mov %0, %%fs" : : "rm"(sel));
390 static inline void load_gs(u16 sel)
392 asm("mov %0, %%gs" : : "rm"(sel));
396 static inline void load_ldt(u16 sel)
398 asm("lldt %0" : : "rm"(sel));
402 static inline void get_idt(struct descriptor_table *table)
404 asm("sidt %0" : "=m"(*table));
407 static inline void get_gdt(struct descriptor_table *table)
409 asm("sgdt %0" : "=m"(*table));
412 static inline unsigned long read_tr_base(void)
415 asm("str %0" : "=g"(tr));
416 return segment_base(tr);
420 static inline unsigned long read_msr(unsigned long msr)
429 static inline void fx_save(struct i387_fxsave_struct *image)
431 asm("fxsave (%0)":: "r" (image));
434 static inline void fx_restore(struct i387_fxsave_struct *image)
436 asm("fxrstor (%0)":: "r" (image));
439 static inline void fpu_init(void)
444 static inline u32 get_rdx_init_val(void)
446 return 0x600; /* P6 family */
449 #define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
450 #define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
451 #define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
452 #define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
453 #define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
454 #define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
455 #define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
456 #define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
457 #define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
459 #define MSR_IA32_TIME_STAMP_COUNTER 0x010
461 #define TSS_IOPB_BASE_OFFSET 0x66
462 #define TSS_BASE_SIZE 0x68
463 #define TSS_IOPB_SIZE (65536 / 8)
464 #define TSS_REDIRECTION_SIZE (256 / 8)
465 #define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)