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KVM: Generalize exception injection mechanism
[linux-2.6-block.git] / drivers / kvm / x86.h
CommitLineData
043405e1
CO		 1#/*
2 * 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
11#ifndef KVM_X86_H
12#define KVM_X86_H
13
14#include "kvm.h"
e01a1b57 15#include "irq.h"
043405e1 16
34c16eec
ZX		 17#include <linux/types.h>
18#include <linux/mm.h>
19
20#include <linux/kvm.h>
21#include <linux/kvm_para.h>
22
e01a1b57
HB		 23#include <asm/desc.h>
24
cd6e8f87
ZX		 25#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
26#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
27#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL)
28
29#define KVM_GUEST_CR0_MASK \
30 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
31 | X86_CR0_NW | X86_CR0_CD)
32#define KVM_VM_CR0_ALWAYS_ON \
33 (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
34 | X86_CR0_MP)
35#define KVM_GUEST_CR4_MASK \
36 (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
37#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
38#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
39
40#define INVALID_PAGE (~(hpa_t)0)
41#define UNMAPPED_GVA (~(gpa_t)0)
42
43#define DE_VECTOR 0
44#define UD_VECTOR 6
45#define NM_VECTOR 7
46#define DF_VECTOR 8
47#define TS_VECTOR 10
48#define NP_VECTOR 11
49#define SS_VECTOR 12
50#define GP_VECTOR 13
51#define PF_VECTOR 14
52
53#define SELECTOR_TI_MASK (1 << 2)
54#define SELECTOR_RPL_MASK 0x03
55
56#define IOPL_SHIFT 12
57
e9b11c17
ZX		 58extern spinlock_t kvm_lock;
59extern struct list_head vm_list;
60
2b3ccfa0
ZX		 61enum {
62 VCPU_REGS_RAX = 0,
63 VCPU_REGS_RCX = 1,
64 VCPU_REGS_RDX = 2,
65 VCPU_REGS_RBX = 3,
66 VCPU_REGS_RSP = 4,
67 VCPU_REGS_RBP = 5,
68 VCPU_REGS_RSI = 6,
69 VCPU_REGS_RDI = 7,
70#ifdef CONFIG_X86_64
71 VCPU_REGS_R8 = 8,
72 VCPU_REGS_R9 = 9,
73 VCPU_REGS_R10 = 10,
74 VCPU_REGS_R11 = 11,
75 VCPU_REGS_R12 = 12,
76 VCPU_REGS_R13 = 13,
77 VCPU_REGS_R14 = 14,
78 VCPU_REGS_R15 = 15,
79#endif
80 NR_VCPU_REGS
81};
82
83enum {
84 VCPU_SREG_CS,
85 VCPU_SREG_DS,
86 VCPU_SREG_ES,
87 VCPU_SREG_FS,
88 VCPU_SREG_GS,
89 VCPU_SREG_SS,
90 VCPU_SREG_TR,
91 VCPU_SREG_LDTR,
92};
93
94#include "x86_emulate.h"
95
34c16eec
ZX		 96struct kvm_vcpu {
97 KVM_VCPU_COMM;
98 u64 host_tsc;
99 int interrupt_window_open;
100 unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
101 DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
102 unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
103 unsigned long rip; /* needs vcpu_load_rsp_rip() */
104
105 unsigned long cr0;
106 unsigned long cr2;
107 unsigned long cr3;
108 unsigned long cr4;
109 unsigned long cr8;
110 u64 pdptrs[4]; /* pae */
111 u64 shadow_efer;
112 u64 apic_base;
113 struct kvm_lapic *apic; /* kernel irqchip context */
114#define VCPU_MP_STATE_RUNNABLE 0
115#define VCPU_MP_STATE_UNINITIALIZED 1
116#define VCPU_MP_STATE_INIT_RECEIVED 2
117#define VCPU_MP_STATE_SIPI_RECEIVED 3
118#define VCPU_MP_STATE_HALTED 4
119 int mp_state;
120 int sipi_vector;
121 u64 ia32_misc_enable_msr;
122
123 struct kvm_mmu mmu;
124
125 struct kvm_mmu_memory_cache mmu_pte_chain_cache;
126 struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
127 struct kvm_mmu_memory_cache mmu_page_cache;
128 struct kvm_mmu_memory_cache mmu_page_header_cache;
129
130 gfn_t last_pt_write_gfn;
131 int last_pt_write_count;
132 u64 *last_pte_updated;
133
134
135 struct i387_fxsave_struct host_fx_image;
136 struct i387_fxsave_struct guest_fx_image;
137
138 gva_t mmio_fault_cr2;
139 struct kvm_pio_request pio;
140 void *pio_data;
141
298101da
AK		 142 struct kvm_queued_exception {
143 bool pending;
144 bool has_error_code;
145 u8 nr;
146 u32 error_code;
147 } exception;
148
34c16eec
ZX		 149 struct {
150 int active;
151 u8 save_iopl;
152 struct kvm_save_segment {
153 u16 selector;
154 unsigned long base;
155 u32 limit;
156 u32 ar;
157 } tr, es, ds, fs, gs;
158 } rmode;
159 int halt_request; /* real mode on Intel only */
160
161 int cpuid_nent;
07716717 162 struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
34c16eec
ZX		 163
164 /* emulate context */
165
166 struct x86_emulate_ctxt emulate_ctxt;
167};
168
e01a1b57
HB		 169struct descriptor_table {
170 u16 limit;
171 unsigned long base;
172} __attribute__((packed));
173
ea4a5ff8
ZX		 174struct kvm_x86_ops {
175 int (*cpu_has_kvm_support)(void); /* __init */
176 int (*disabled_by_bios)(void); /* __init */
177 void (*hardware_enable)(void *dummy); /* __init */
178 void (*hardware_disable)(void *dummy);
179 void (*check_processor_compatibility)(void *rtn);
180 int (*hardware_setup)(void); /* __init */
181 void (*hardware_unsetup)(void); /* __exit */
182
183 /* Create, but do not attach this VCPU */
184 struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
185 void (*vcpu_free)(struct kvm_vcpu *vcpu);
186 int (*vcpu_reset)(struct kvm_vcpu *vcpu);
187
188 void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
189 void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
190 void (*vcpu_put)(struct kvm_vcpu *vcpu);
191 void (*vcpu_decache)(struct kvm_vcpu *vcpu);
192
193 int (*set_guest_debug)(struct kvm_vcpu *vcpu,
194 struct kvm_debug_guest *dbg);
195 void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
196 int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
197 int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
198 u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
199 void (*get_segment)(struct kvm_vcpu *vcpu,
200 struct kvm_segment *var, int seg);
201 void (*set_segment)(struct kvm_vcpu *vcpu,
202 struct kvm_segment *var, int seg);
203 void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
204 void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
205 void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
206 void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
207 void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
208 void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
209 void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
210 void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
211 void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
212 void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
213 unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
214 void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
215 int *exception);
216 void (*cache_regs)(struct kvm_vcpu *vcpu);
217 void (*decache_regs)(struct kvm_vcpu *vcpu);
218 unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
219 void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
220
221 void (*tlb_flush)(struct kvm_vcpu *vcpu);
222 void (*inject_page_fault)(struct kvm_vcpu *vcpu,
223 unsigned long addr, u32 err_code);
224
225 void (*inject_gp)(struct kvm_vcpu *vcpu, unsigned err_code);
226
227 void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
228 int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
229 void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
230 void (*patch_hypercall)(struct kvm_vcpu *vcpu,
231 unsigned char *hypercall_addr);
232 int (*get_irq)(struct kvm_vcpu *vcpu);
233 void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
298101da
AK		 234 void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
235 bool has_error_code, u32 error_code);
236 bool (*exception_injected)(struct kvm_vcpu *vcpu);
ea4a5ff8
ZX		 237 void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
238 void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
239 struct kvm_run *run);
240
241 int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
242};
243
97896d04
ZX		 244extern struct kvm_x86_ops *kvm_x86_ops;
245
54f1585a
ZX		 246int kvm_mmu_module_init(void);
247void kvm_mmu_module_exit(void);
248
249void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
250int kvm_mmu_create(struct kvm_vcpu *vcpu);
251int kvm_mmu_setup(struct kvm_vcpu *vcpu);
252void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
253
254int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
255void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
256void kvm_mmu_zap_all(struct kvm *kvm);
3ad82a7e 257unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
54f1585a
ZX		 258void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
259
260enum emulation_result {
261 EMULATE_DONE, /* no further processing */
262 EMULATE_DO_MMIO, /* kvm_run filled with mmio request */
263 EMULATE_FAIL, /* can't emulate this instruction */
264};
265
266int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run,
267 unsigned long cr2, u16 error_code, int no_decode);
268void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context);
269void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
270void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address);
271void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
272 unsigned long *rflags);
273
274unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr);
275void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value,
276 unsigned long *rflags);
277int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data);
278int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
279
280struct x86_emulate_ctxt;
281
282int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
283 int size, unsigned port);
284int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
285 int size, unsigned long count, int down,
286 gva_t address, int rep, unsigned port);
287void kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
288int kvm_emulate_halt(struct kvm_vcpu *vcpu);
289int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address);
290int emulate_clts(struct kvm_vcpu *vcpu);
291int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr,
292 unsigned long *dest);
293int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr,
294 unsigned long value);
295
296void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
297void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0);
298void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0);
299void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0);
300unsigned long get_cr8(struct kvm_vcpu *vcpu);
301void lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
302void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l);
303
304int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
305int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
306
298101da
AK		 307void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
308void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
309
54f1585a
ZX		 310void fx_init(struct kvm_vcpu *vcpu);
311
312int emulator_read_std(unsigned long addr,
313 void *val,
314 unsigned int bytes,
315 struct kvm_vcpu *vcpu);
316int emulator_write_emulated(unsigned long addr,
317 const void *val,
318 unsigned int bytes,
319 struct kvm_vcpu *vcpu);
320
321unsigned long segment_base(u16 selector);
322
d835dfec 323void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu);
54f1585a
ZX		 324void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
325 const u8 *new, int bytes);
326int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva);
327void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu);
328int kvm_mmu_load(struct kvm_vcpu *vcpu);
329void kvm_mmu_unload(struct kvm_vcpu *vcpu);
330
331int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
332
333int kvm_fix_hypercall(struct kvm_vcpu *vcpu);
334
3067714c 335int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code);
34c16eec
ZX		 336
337static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
338{
339 if (unlikely(vcpu->kvm->n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
340 __kvm_mmu_free_some_pages(vcpu);
341}
342
343static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
344{
345 if (likely(vcpu->mmu.root_hpa != INVALID_PAGE))
346 return 0;
347
348 return kvm_mmu_load(vcpu);
349}
350
351static inline int is_long_mode(struct kvm_vcpu *vcpu)
352{
353#ifdef CONFIG_X86_64
354 return vcpu->shadow_efer & EFER_LME;
355#else
356 return 0;
357#endif
358}
359
360static inline int is_pae(struct kvm_vcpu *vcpu)
361{
362 return vcpu->cr4 & X86_CR4_PAE;
363}
364
365static inline int is_pse(struct kvm_vcpu *vcpu)
366{
367 return vcpu->cr4 & X86_CR4_PSE;
368}
369
370static inline int is_paging(struct kvm_vcpu *vcpu)
371{
372 return vcpu->cr0 & X86_CR0_PG;
373}
374
a03490ed 375int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
de7d789a 376int complete_pio(struct kvm_vcpu *vcpu);
ec6d273d
ZX		 377
378static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
379{
380 struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT);
381
382 return (struct kvm_mmu_page *)page_private(page);
383}
384
385static inline u16 read_fs(void)
386{
387 u16 seg;
388 asm("mov %%fs, %0" : "=g"(seg));
389 return seg;
390}
391
392static inline u16 read_gs(void)
393{
394 u16 seg;
395 asm("mov %%gs, %0" : "=g"(seg));
396 return seg;
397}
398
399static inline u16 read_ldt(void)
400{
401 u16 ldt;
402 asm("sldt %0" : "=g"(ldt));
403 return ldt;
404}
405
406static inline void load_fs(u16 sel)
407{
408 asm("mov %0, %%fs" : : "rm"(sel));
409}
410
411static inline void load_gs(u16 sel)
412{
413 asm("mov %0, %%gs" : : "rm"(sel));
414}
415
416#ifndef load_ldt
417static inline void load_ldt(u16 sel)
418{
419 asm("lldt %0" : : "rm"(sel));
420}
421#endif
422
423static inline void get_idt(struct descriptor_table *table)
424{
425 asm("sidt %0" : "=m"(*table));
426}
427
428static inline void get_gdt(struct descriptor_table *table)
429{
430 asm("sgdt %0" : "=m"(*table));
431}
432
433static inline unsigned long read_tr_base(void)
434{
435 u16 tr;
436 asm("str %0" : "=g"(tr));
437 return segment_base(tr);
438}
439
440#ifdef CONFIG_X86_64
441static inline unsigned long read_msr(unsigned long msr)
442{
443 u64 value;
444
445 rdmsrl(msr, value);
446 return value;
447}
448#endif
449
450static inline void fx_save(struct i387_fxsave_struct *image)
451{
452 asm("fxsave (%0)":: "r" (image));
453}
454
455static inline void fx_restore(struct i387_fxsave_struct *image)
456{
457 asm("fxrstor (%0)":: "r" (image));
458}
459
460static inline void fpu_init(void)
461{
462 asm("finit");
463}
464
465static inline u32 get_rdx_init_val(void)
466{
467 return 0x600; /* P6 family */
468}
469
470#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30"
471#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2"
472#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3"
473#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30"
474#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0"
475#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0"
476#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4"
477#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4"
478#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30"
479
480#define MSR_IA32_TIME_STAMP_COUNTER 0x010
481
482#define TSS_IOPB_BASE_OFFSET 0x66
483#define TSS_BASE_SIZE 0x68
484#define TSS_IOPB_SIZE (65536 / 8)
485#define TSS_REDIRECTION_SIZE (256 / 8)
486#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
53e0aa7b
HB		 487
488static inline int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
489{
490 return vcpu->mp_state == VCPU_MP_STATE_RUNNABLE
491 || vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED;
492}
493
043405e1 494#endif
Linux 6.x block layer and io_uring tree(s)