xref: /linux/arch/x86/include/asm/kvm_host.h (revision bde5d79d00255db609fe9d859eef8c7b6d38b137)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Kernel-based Virtual Machine driver for Linux
4  *
5  * This header defines architecture specific interfaces, x86 version
6  */
7 
8 #ifndef _ASM_X86_KVM_HOST_H
9 #define _ASM_X86_KVM_HOST_H
10 
11 #include <linux/types.h>
12 #include <linux/mm.h>
13 #include <linux/mmu_notifier.h>
14 #include <linux/tracepoint.h>
15 #include <linux/cpumask.h>
16 #include <linux/irq_work.h>
17 #include <linux/irq.h>
18 #include <linux/workqueue.h>
19 
20 #include <linux/kvm.h>
21 #include <linux/kvm_para.h>
22 #include <linux/kvm_types.h>
23 #include <linux/perf_event.h>
24 #include <linux/pvclock_gtod.h>
25 #include <linux/clocksource.h>
26 #include <linux/irqbypass.h>
27 #include <linux/hyperv.h>
28 #include <linux/kfifo.h>
29 
30 #include <asm/apic.h>
31 #include <asm/pvclock-abi.h>
32 #include <asm/desc.h>
33 #include <asm/mtrr.h>
34 #include <asm/msr-index.h>
35 #include <asm/asm.h>
36 #include <asm/kvm_page_track.h>
37 #include <asm/kvm_vcpu_regs.h>
38 #include <asm/hyperv-tlfs.h>
39 #include <asm/reboot.h>
40 
41 #define __KVM_HAVE_ARCH_VCPU_DEBUGFS
42 
43 /*
44  * CONFIG_KVM_MAX_NR_VCPUS is defined iff CONFIG_KVM!=n, provide a dummy max if
45  * KVM is disabled (arbitrarily use the default from CONFIG_KVM_MAX_NR_VCPUS).
46  */
47 #ifdef CONFIG_KVM_MAX_NR_VCPUS
48 #define KVM_MAX_VCPUS CONFIG_KVM_MAX_NR_VCPUS
49 #else
50 #define KVM_MAX_VCPUS 1024
51 #endif
52 
53 /*
54  * In x86, the VCPU ID corresponds to the APIC ID, and APIC IDs
55  * might be larger than the actual number of VCPUs because the
56  * APIC ID encodes CPU topology information.
57  *
58  * In the worst case, we'll need less than one extra bit for the
59  * Core ID, and less than one extra bit for the Package (Die) ID,
60  * so ratio of 4 should be enough.
61  */
62 #define KVM_VCPU_ID_RATIO 4
63 #define KVM_MAX_VCPU_IDS (KVM_MAX_VCPUS * KVM_VCPU_ID_RATIO)
64 
65 /* memory slots that are not exposed to userspace */
66 #define KVM_INTERNAL_MEM_SLOTS 3
67 
68 #define KVM_HALT_POLL_NS_DEFAULT 200000
69 
70 #define KVM_IRQCHIP_NUM_PINS  KVM_IOAPIC_NUM_PINS
71 
72 #define KVM_DIRTY_LOG_MANUAL_CAPS   (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \
73 					KVM_DIRTY_LOG_INITIALLY_SET)
74 
75 #define KVM_BUS_LOCK_DETECTION_VALID_MODE	(KVM_BUS_LOCK_DETECTION_OFF | \
76 						 KVM_BUS_LOCK_DETECTION_EXIT)
77 
78 #define KVM_X86_NOTIFY_VMEXIT_VALID_BITS	(KVM_X86_NOTIFY_VMEXIT_ENABLED | \
79 						 KVM_X86_NOTIFY_VMEXIT_USER)
80 
81 /* x86-specific vcpu->requests bit members */
82 #define KVM_REQ_MIGRATE_TIMER		KVM_ARCH_REQ(0)
83 #define KVM_REQ_REPORT_TPR_ACCESS	KVM_ARCH_REQ(1)
84 #define KVM_REQ_TRIPLE_FAULT		KVM_ARCH_REQ(2)
85 #define KVM_REQ_MMU_SYNC		KVM_ARCH_REQ(3)
86 #define KVM_REQ_CLOCK_UPDATE		KVM_ARCH_REQ(4)
87 #define KVM_REQ_LOAD_MMU_PGD		KVM_ARCH_REQ(5)
88 #define KVM_REQ_EVENT			KVM_ARCH_REQ(6)
89 #define KVM_REQ_APF_HALT		KVM_ARCH_REQ(7)
90 #define KVM_REQ_STEAL_UPDATE		KVM_ARCH_REQ(8)
91 #define KVM_REQ_NMI			KVM_ARCH_REQ(9)
92 #define KVM_REQ_PMU			KVM_ARCH_REQ(10)
93 #define KVM_REQ_PMI			KVM_ARCH_REQ(11)
94 #ifdef CONFIG_KVM_SMM
95 #define KVM_REQ_SMI			KVM_ARCH_REQ(12)
96 #endif
97 #define KVM_REQ_MASTERCLOCK_UPDATE	KVM_ARCH_REQ(13)
98 #define KVM_REQ_MCLOCK_INPROGRESS \
99 	KVM_ARCH_REQ_FLAGS(14, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
100 #define KVM_REQ_SCAN_IOAPIC \
101 	KVM_ARCH_REQ_FLAGS(15, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
102 #define KVM_REQ_GLOBAL_CLOCK_UPDATE	KVM_ARCH_REQ(16)
103 #define KVM_REQ_APIC_PAGE_RELOAD \
104 	KVM_ARCH_REQ_FLAGS(17, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
105 #define KVM_REQ_HV_CRASH		KVM_ARCH_REQ(18)
106 #define KVM_REQ_IOAPIC_EOI_EXIT		KVM_ARCH_REQ(19)
107 #define KVM_REQ_HV_RESET		KVM_ARCH_REQ(20)
108 #define KVM_REQ_HV_EXIT			KVM_ARCH_REQ(21)
109 #define KVM_REQ_HV_STIMER		KVM_ARCH_REQ(22)
110 #define KVM_REQ_LOAD_EOI_EXITMAP	KVM_ARCH_REQ(23)
111 #define KVM_REQ_GET_NESTED_STATE_PAGES	KVM_ARCH_REQ(24)
112 #define KVM_REQ_APICV_UPDATE \
113 	KVM_ARCH_REQ_FLAGS(25, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
114 #define KVM_REQ_TLB_FLUSH_CURRENT	KVM_ARCH_REQ(26)
115 #define KVM_REQ_TLB_FLUSH_GUEST \
116 	KVM_ARCH_REQ_FLAGS(27, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
117 #define KVM_REQ_APF_READY		KVM_ARCH_REQ(28)
118 #define KVM_REQ_MSR_FILTER_CHANGED	KVM_ARCH_REQ(29)
119 #define KVM_REQ_UPDATE_CPU_DIRTY_LOGGING \
120 	KVM_ARCH_REQ_FLAGS(30, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
121 #define KVM_REQ_MMU_FREE_OBSOLETE_ROOTS \
122 	KVM_ARCH_REQ_FLAGS(31, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
123 #define KVM_REQ_HV_TLB_FLUSH \
124 	KVM_ARCH_REQ_FLAGS(32, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
125 #define KVM_REQ_UPDATE_PROTECTED_GUEST_STATE	KVM_ARCH_REQ(34)
126 
127 #define CR0_RESERVED_BITS                                               \
128 	(~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
129 			  | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
130 			  | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
131 
132 #define CR4_RESERVED_BITS                                               \
133 	(~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
134 			  | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE     \
135 			  | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR | X86_CR4_PCIDE \
136 			  | X86_CR4_OSXSAVE | X86_CR4_SMEP | X86_CR4_FSGSBASE \
137 			  | X86_CR4_OSXMMEXCPT | X86_CR4_LA57 | X86_CR4_VMXE \
138 			  | X86_CR4_SMAP | X86_CR4_PKE | X86_CR4_UMIP \
139 			  | X86_CR4_LAM_SUP))
140 
141 #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
142 
143 
144 
145 #define INVALID_PAGE (~(hpa_t)0)
146 #define VALID_PAGE(x) ((x) != INVALID_PAGE)
147 
148 /* KVM Hugepage definitions for x86 */
149 #define KVM_MAX_HUGEPAGE_LEVEL	PG_LEVEL_1G
150 #define KVM_NR_PAGE_SIZES	(KVM_MAX_HUGEPAGE_LEVEL - PG_LEVEL_4K + 1)
151 #define KVM_HPAGE_GFN_SHIFT(x)	(((x) - 1) * 9)
152 #define KVM_HPAGE_SHIFT(x)	(PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
153 #define KVM_HPAGE_SIZE(x)	(1UL << KVM_HPAGE_SHIFT(x))
154 #define KVM_HPAGE_MASK(x)	(~(KVM_HPAGE_SIZE(x) - 1))
155 #define KVM_PAGES_PER_HPAGE(x)	(KVM_HPAGE_SIZE(x) / PAGE_SIZE)
156 
157 #define KVM_MEMSLOT_PAGES_TO_MMU_PAGES_RATIO 50
158 #define KVM_MIN_ALLOC_MMU_PAGES 64UL
159 #define KVM_MMU_HASH_SHIFT 12
160 #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
161 #define KVM_MIN_FREE_MMU_PAGES 5
162 #define KVM_REFILL_PAGES 25
163 #define KVM_MAX_CPUID_ENTRIES 256
164 #define KVM_NR_VAR_MTRR 8
165 
166 #define ASYNC_PF_PER_VCPU 64
167 
168 enum kvm_reg {
169 	VCPU_REGS_RAX = __VCPU_REGS_RAX,
170 	VCPU_REGS_RCX = __VCPU_REGS_RCX,
171 	VCPU_REGS_RDX = __VCPU_REGS_RDX,
172 	VCPU_REGS_RBX = __VCPU_REGS_RBX,
173 	VCPU_REGS_RSP = __VCPU_REGS_RSP,
174 	VCPU_REGS_RBP = __VCPU_REGS_RBP,
175 	VCPU_REGS_RSI = __VCPU_REGS_RSI,
176 	VCPU_REGS_RDI = __VCPU_REGS_RDI,
177 #ifdef CONFIG_X86_64
178 	VCPU_REGS_R8  = __VCPU_REGS_R8,
179 	VCPU_REGS_R9  = __VCPU_REGS_R9,
180 	VCPU_REGS_R10 = __VCPU_REGS_R10,
181 	VCPU_REGS_R11 = __VCPU_REGS_R11,
182 	VCPU_REGS_R12 = __VCPU_REGS_R12,
183 	VCPU_REGS_R13 = __VCPU_REGS_R13,
184 	VCPU_REGS_R14 = __VCPU_REGS_R14,
185 	VCPU_REGS_R15 = __VCPU_REGS_R15,
186 #endif
187 	VCPU_REGS_RIP,
188 	NR_VCPU_REGS,
189 
190 	VCPU_EXREG_PDPTR = NR_VCPU_REGS,
191 	VCPU_EXREG_CR0,
192 	VCPU_EXREG_CR3,
193 	VCPU_EXREG_CR4,
194 	VCPU_EXREG_RFLAGS,
195 	VCPU_EXREG_SEGMENTS,
196 	VCPU_EXREG_EXIT_INFO_1,
197 	VCPU_EXREG_EXIT_INFO_2,
198 };
199 
200 enum {
201 	VCPU_SREG_ES,
202 	VCPU_SREG_CS,
203 	VCPU_SREG_SS,
204 	VCPU_SREG_DS,
205 	VCPU_SREG_FS,
206 	VCPU_SREG_GS,
207 	VCPU_SREG_TR,
208 	VCPU_SREG_LDTR,
209 };
210 
211 enum exit_fastpath_completion {
212 	EXIT_FASTPATH_NONE,
213 	EXIT_FASTPATH_REENTER_GUEST,
214 	EXIT_FASTPATH_EXIT_HANDLED,
215 	EXIT_FASTPATH_EXIT_USERSPACE,
216 };
217 typedef enum exit_fastpath_completion fastpath_t;
218 
219 struct x86_emulate_ctxt;
220 struct x86_exception;
221 union kvm_smram;
222 enum x86_intercept;
223 enum x86_intercept_stage;
224 
225 #define KVM_NR_DB_REGS	4
226 
227 #define DR6_BUS_LOCK   (1 << 11)
228 #define DR6_BD		(1 << 13)
229 #define DR6_BS		(1 << 14)
230 #define DR6_BT		(1 << 15)
231 #define DR6_RTM		(1 << 16)
232 /*
233  * DR6_ACTIVE_LOW combines fixed-1 and active-low bits.
234  * We can regard all the bits in DR6_FIXED_1 as active_low bits;
235  * they will never be 0 for now, but when they are defined
236  * in the future it will require no code change.
237  *
238  * DR6_ACTIVE_LOW is also used as the init/reset value for DR6.
239  */
240 #define DR6_ACTIVE_LOW	0xffff0ff0
241 #define DR6_VOLATILE	0x0001e80f
242 #define DR6_FIXED_1	(DR6_ACTIVE_LOW & ~DR6_VOLATILE)
243 
244 #define DR7_BP_EN_MASK	0x000000ff
245 #define DR7_GE		(1 << 9)
246 #define DR7_GD		(1 << 13)
247 #define DR7_FIXED_1	0x00000400
248 #define DR7_VOLATILE	0xffff2bff
249 
250 #define KVM_GUESTDBG_VALID_MASK \
251 	(KVM_GUESTDBG_ENABLE | \
252 	KVM_GUESTDBG_SINGLESTEP | \
253 	KVM_GUESTDBG_USE_HW_BP | \
254 	KVM_GUESTDBG_USE_SW_BP | \
255 	KVM_GUESTDBG_INJECT_BP | \
256 	KVM_GUESTDBG_INJECT_DB | \
257 	KVM_GUESTDBG_BLOCKIRQ)
258 
259 #define PFERR_PRESENT_MASK	BIT(0)
260 #define PFERR_WRITE_MASK	BIT(1)
261 #define PFERR_USER_MASK		BIT(2)
262 #define PFERR_RSVD_MASK		BIT(3)
263 #define PFERR_FETCH_MASK	BIT(4)
264 #define PFERR_PK_MASK		BIT(5)
265 #define PFERR_SGX_MASK		BIT(15)
266 #define PFERR_GUEST_RMP_MASK	BIT_ULL(31)
267 #define PFERR_GUEST_FINAL_MASK	BIT_ULL(32)
268 #define PFERR_GUEST_PAGE_MASK	BIT_ULL(33)
269 #define PFERR_GUEST_ENC_MASK	BIT_ULL(34)
270 #define PFERR_GUEST_SIZEM_MASK	BIT_ULL(35)
271 #define PFERR_GUEST_VMPL_MASK	BIT_ULL(36)
272 
273 /*
274  * IMPLICIT_ACCESS is a KVM-defined flag used to correctly perform SMAP checks
275  * when emulating instructions that triggers implicit access.
276  */
277 #define PFERR_IMPLICIT_ACCESS	BIT_ULL(48)
278 /*
279  * PRIVATE_ACCESS is a KVM-defined flag us to indicate that a fault occurred
280  * when the guest was accessing private memory.
281  */
282 #define PFERR_PRIVATE_ACCESS   BIT_ULL(49)
283 #define PFERR_SYNTHETIC_MASK   (PFERR_IMPLICIT_ACCESS | PFERR_PRIVATE_ACCESS)
284 
285 /* apic attention bits */
286 #define KVM_APIC_CHECK_VAPIC	0
287 /*
288  * The following bit is set with PV-EOI, unset on EOI.
289  * We detect PV-EOI changes by guest by comparing
290  * this bit with PV-EOI in guest memory.
291  * See the implementation in apic_update_pv_eoi.
292  */
293 #define KVM_APIC_PV_EOI_PENDING	1
294 
295 struct kvm_kernel_irq_routing_entry;
296 
297 /*
298  * kvm_mmu_page_role tracks the properties of a shadow page (where shadow page
299  * also includes TDP pages) to determine whether or not a page can be used in
300  * the given MMU context.  This is a subset of the overall kvm_cpu_role to
301  * minimize the size of kvm_memory_slot.arch.gfn_write_track, i.e. allows
302  * allocating 2 bytes per gfn instead of 4 bytes per gfn.
303  *
304  * Upper-level shadow pages having gptes are tracked for write-protection via
305  * gfn_write_track.  As above, gfn_write_track is a 16 bit counter, so KVM must
306  * not create more than 2^16-1 upper-level shadow pages at a single gfn,
307  * otherwise gfn_write_track will overflow and explosions will ensue.
308  *
309  * A unique shadow page (SP) for a gfn is created if and only if an existing SP
310  * cannot be reused.  The ability to reuse a SP is tracked by its role, which
311  * incorporates various mode bits and properties of the SP.  Roughly speaking,
312  * the number of unique SPs that can theoretically be created is 2^n, where n
313  * is the number of bits that are used to compute the role.
314  *
315  * But, even though there are 19 bits in the mask below, not all combinations
316  * of modes and flags are possible:
317  *
318  *   - invalid shadow pages are not accounted, so the bits are effectively 18
319  *
320  *   - quadrant will only be used if has_4_byte_gpte=1 (non-PAE paging);
321  *     execonly and ad_disabled are only used for nested EPT which has
322  *     has_4_byte_gpte=0.  Therefore, 2 bits are always unused.
323  *
324  *   - the 4 bits of level are effectively limited to the values 2/3/4/5,
325  *     as 4k SPs are not tracked (allowed to go unsync).  In addition non-PAE
326  *     paging has exactly one upper level, making level completely redundant
327  *     when has_4_byte_gpte=1.
328  *
329  *   - on top of this, smep_andnot_wp and smap_andnot_wp are only set if
330  *     cr0_wp=0, therefore these three bits only give rise to 5 possibilities.
331  *
332  * Therefore, the maximum number of possible upper-level shadow pages for a
333  * single gfn is a bit less than 2^13.
334  */
335 union kvm_mmu_page_role {
336 	u32 word;
337 	struct {
338 		unsigned level:4;
339 		unsigned has_4_byte_gpte:1;
340 		unsigned quadrant:2;
341 		unsigned direct:1;
342 		unsigned access:3;
343 		unsigned invalid:1;
344 		unsigned efer_nx:1;
345 		unsigned cr0_wp:1;
346 		unsigned smep_andnot_wp:1;
347 		unsigned smap_andnot_wp:1;
348 		unsigned ad_disabled:1;
349 		unsigned guest_mode:1;
350 		unsigned passthrough:1;
351 		unsigned :5;
352 
353 		/*
354 		 * This is left at the top of the word so that
355 		 * kvm_memslots_for_spte_role can extract it with a
356 		 * simple shift.  While there is room, give it a whole
357 		 * byte so it is also faster to load it from memory.
358 		 */
359 		unsigned smm:8;
360 	};
361 };
362 
363 /*
364  * kvm_mmu_extended_role complements kvm_mmu_page_role, tracking properties
365  * relevant to the current MMU configuration.   When loading CR0, CR4, or EFER,
366  * including on nested transitions, if nothing in the full role changes then
367  * MMU re-configuration can be skipped. @valid bit is set on first usage so we
368  * don't treat all-zero structure as valid data.
369  *
370  * The properties that are tracked in the extended role but not the page role
371  * are for things that either (a) do not affect the validity of the shadow page
372  * or (b) are indirectly reflected in the shadow page's role.  For example,
373  * CR4.PKE only affects permission checks for software walks of the guest page
374  * tables (because KVM doesn't support Protection Keys with shadow paging), and
375  * CR0.PG, CR4.PAE, and CR4.PSE are indirectly reflected in role.level.
376  *
377  * Note, SMEP and SMAP are not redundant with sm*p_andnot_wp in the page role.
378  * If CR0.WP=1, KVM can reuse shadow pages for the guest regardless of SMEP and
379  * SMAP, but the MMU's permission checks for software walks need to be SMEP and
380  * SMAP aware regardless of CR0.WP.
381  */
382 union kvm_mmu_extended_role {
383 	u32 word;
384 	struct {
385 		unsigned int valid:1;
386 		unsigned int execonly:1;
387 		unsigned int cr4_pse:1;
388 		unsigned int cr4_pke:1;
389 		unsigned int cr4_smap:1;
390 		unsigned int cr4_smep:1;
391 		unsigned int cr4_la57:1;
392 		unsigned int efer_lma:1;
393 	};
394 };
395 
396 union kvm_cpu_role {
397 	u64 as_u64;
398 	struct {
399 		union kvm_mmu_page_role base;
400 		union kvm_mmu_extended_role ext;
401 	};
402 };
403 
404 struct kvm_rmap_head {
405 	unsigned long val;
406 };
407 
408 struct kvm_pio_request {
409 	unsigned long linear_rip;
410 	unsigned long count;
411 	int in;
412 	int port;
413 	int size;
414 };
415 
416 #define PT64_ROOT_MAX_LEVEL 5
417 
418 struct rsvd_bits_validate {
419 	u64 rsvd_bits_mask[2][PT64_ROOT_MAX_LEVEL];
420 	u64 bad_mt_xwr;
421 };
422 
423 struct kvm_mmu_root_info {
424 	gpa_t pgd;
425 	hpa_t hpa;
426 };
427 
428 #define KVM_MMU_ROOT_INFO_INVALID \
429 	((struct kvm_mmu_root_info) { .pgd = INVALID_PAGE, .hpa = INVALID_PAGE })
430 
431 #define KVM_MMU_NUM_PREV_ROOTS 3
432 
433 #define KVM_MMU_ROOT_CURRENT		BIT(0)
434 #define KVM_MMU_ROOT_PREVIOUS(i)	BIT(1+i)
435 #define KVM_MMU_ROOTS_ALL		(BIT(1 + KVM_MMU_NUM_PREV_ROOTS) - 1)
436 
437 #define KVM_HAVE_MMU_RWLOCK
438 
439 struct kvm_mmu_page;
440 struct kvm_page_fault;
441 
442 /*
443  * x86 supports 4 paging modes (5-level 64-bit, 4-level 64-bit, 3-level 32-bit,
444  * and 2-level 32-bit).  The kvm_mmu structure abstracts the details of the
445  * current mmu mode.
446  */
447 struct kvm_mmu {
448 	unsigned long (*get_guest_pgd)(struct kvm_vcpu *vcpu);
449 	u64 (*get_pdptr)(struct kvm_vcpu *vcpu, int index);
450 	int (*page_fault)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault);
451 	void (*inject_page_fault)(struct kvm_vcpu *vcpu,
452 				  struct x86_exception *fault);
453 	gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
454 			    gpa_t gva_or_gpa, u64 access,
455 			    struct x86_exception *exception);
456 	int (*sync_spte)(struct kvm_vcpu *vcpu,
457 			 struct kvm_mmu_page *sp, int i);
458 	struct kvm_mmu_root_info root;
459 	union kvm_cpu_role cpu_role;
460 	union kvm_mmu_page_role root_role;
461 
462 	/*
463 	* The pkru_mask indicates if protection key checks are needed.  It
464 	* consists of 16 domains indexed by page fault error code bits [4:1],
465 	* with PFEC.RSVD replaced by ACC_USER_MASK from the page tables.
466 	* Each domain has 2 bits which are ANDed with AD and WD from PKRU.
467 	*/
468 	u32 pkru_mask;
469 
470 	struct kvm_mmu_root_info prev_roots[KVM_MMU_NUM_PREV_ROOTS];
471 
472 	/*
473 	 * Bitmap; bit set = permission fault
474 	 * Byte index: page fault error code [4:1]
475 	 * Bit index: pte permissions in ACC_* format
476 	 */
477 	u8 permissions[16];
478 
479 	u64 *pae_root;
480 	u64 *pml4_root;
481 	u64 *pml5_root;
482 
483 	/*
484 	 * check zero bits on shadow page table entries, these
485 	 * bits include not only hardware reserved bits but also
486 	 * the bits spte never used.
487 	 */
488 	struct rsvd_bits_validate shadow_zero_check;
489 
490 	struct rsvd_bits_validate guest_rsvd_check;
491 
492 	u64 pdptrs[4]; /* pae */
493 };
494 
495 enum pmc_type {
496 	KVM_PMC_GP = 0,
497 	KVM_PMC_FIXED,
498 };
499 
500 struct kvm_pmc {
501 	enum pmc_type type;
502 	u8 idx;
503 	bool is_paused;
504 	bool intr;
505 	/*
506 	 * Base value of the PMC counter, relative to the *consumed* count in
507 	 * the associated perf_event.  This value includes counter updates from
508 	 * the perf_event and emulated_count since the last time the counter
509 	 * was reprogrammed, but it is *not* the current value as seen by the
510 	 * guest or userspace.
511 	 *
512 	 * The count is relative to the associated perf_event so that KVM
513 	 * doesn't need to reprogram the perf_event every time the guest writes
514 	 * to the counter.
515 	 */
516 	u64 counter;
517 	/*
518 	 * PMC events triggered by KVM emulation that haven't been fully
519 	 * processed, i.e. haven't undergone overflow detection.
520 	 */
521 	u64 emulated_counter;
522 	u64 eventsel;
523 	struct perf_event *perf_event;
524 	struct kvm_vcpu *vcpu;
525 	/*
526 	 * only for creating or reusing perf_event,
527 	 * eventsel value for general purpose counters,
528 	 * ctrl value for fixed counters.
529 	 */
530 	u64 current_config;
531 };
532 
533 /* More counters may conflict with other existing Architectural MSRs */
534 #define KVM_MAX(a, b)	((a) >= (b) ? (a) : (b))
535 #define KVM_MAX_NR_INTEL_GP_COUNTERS	8
536 #define KVM_MAX_NR_AMD_GP_COUNTERS	6
537 #define KVM_MAX_NR_GP_COUNTERS		KVM_MAX(KVM_MAX_NR_INTEL_GP_COUNTERS, \
538 						KVM_MAX_NR_AMD_GP_COUNTERS)
539 
540 #define KVM_MAX_NR_INTEL_FIXED_COUTNERS	3
541 #define KVM_MAX_NR_AMD_FIXED_COUTNERS	0
542 #define KVM_MAX_NR_FIXED_COUNTERS	KVM_MAX(KVM_MAX_NR_INTEL_FIXED_COUTNERS, \
543 						KVM_MAX_NR_AMD_FIXED_COUTNERS)
544 
545 struct kvm_pmu {
546 	u8 version;
547 	unsigned nr_arch_gp_counters;
548 	unsigned nr_arch_fixed_counters;
549 	unsigned available_event_types;
550 	u64 fixed_ctr_ctrl;
551 	u64 fixed_ctr_ctrl_rsvd;
552 	u64 global_ctrl;
553 	u64 global_status;
554 	u64 counter_bitmask[2];
555 	u64 global_ctrl_rsvd;
556 	u64 global_status_rsvd;
557 	u64 reserved_bits;
558 	u64 raw_event_mask;
559 	struct kvm_pmc gp_counters[KVM_MAX_NR_GP_COUNTERS];
560 	struct kvm_pmc fixed_counters[KVM_MAX_NR_FIXED_COUNTERS];
561 
562 	/*
563 	 * Overlay the bitmap with a 64-bit atomic so that all bits can be
564 	 * set in a single access, e.g. to reprogram all counters when the PMU
565 	 * filter changes.
566 	 */
567 	union {
568 		DECLARE_BITMAP(reprogram_pmi, X86_PMC_IDX_MAX);
569 		atomic64_t __reprogram_pmi;
570 	};
571 	DECLARE_BITMAP(all_valid_pmc_idx, X86_PMC_IDX_MAX);
572 	DECLARE_BITMAP(pmc_in_use, X86_PMC_IDX_MAX);
573 
574 	u64 ds_area;
575 	u64 pebs_enable;
576 	u64 pebs_enable_rsvd;
577 	u64 pebs_data_cfg;
578 	u64 pebs_data_cfg_rsvd;
579 
580 	/*
581 	 * If a guest counter is cross-mapped to host counter with different
582 	 * index, its PEBS capability will be temporarily disabled.
583 	 *
584 	 * The user should make sure that this mask is updated
585 	 * after disabling interrupts and before perf_guest_get_msrs();
586 	 */
587 	u64 host_cross_mapped_mask;
588 
589 	/*
590 	 * The gate to release perf_events not marked in
591 	 * pmc_in_use only once in a vcpu time slice.
592 	 */
593 	bool need_cleanup;
594 
595 	/*
596 	 * The total number of programmed perf_events and it helps to avoid
597 	 * redundant check before cleanup if guest don't use vPMU at all.
598 	 */
599 	u8 event_count;
600 };
601 
602 struct kvm_pmu_ops;
603 
604 enum {
605 	KVM_DEBUGREG_BP_ENABLED = 1,
606 	KVM_DEBUGREG_WONT_EXIT = 2,
607 };
608 
609 struct kvm_mtrr {
610 	u64 var[KVM_NR_VAR_MTRR * 2];
611 	u64 fixed_64k;
612 	u64 fixed_16k[2];
613 	u64 fixed_4k[8];
614 	u64 deftype;
615 };
616 
617 /* Hyper-V SynIC timer */
618 struct kvm_vcpu_hv_stimer {
619 	struct hrtimer timer;
620 	int index;
621 	union hv_stimer_config config;
622 	u64 count;
623 	u64 exp_time;
624 	struct hv_message msg;
625 	bool msg_pending;
626 };
627 
628 /* Hyper-V synthetic interrupt controller (SynIC)*/
629 struct kvm_vcpu_hv_synic {
630 	u64 version;
631 	u64 control;
632 	u64 msg_page;
633 	u64 evt_page;
634 	atomic64_t sint[HV_SYNIC_SINT_COUNT];
635 	atomic_t sint_to_gsi[HV_SYNIC_SINT_COUNT];
636 	DECLARE_BITMAP(auto_eoi_bitmap, 256);
637 	DECLARE_BITMAP(vec_bitmap, 256);
638 	bool active;
639 	bool dont_zero_synic_pages;
640 };
641 
642 /* The maximum number of entries on the TLB flush fifo. */
643 #define KVM_HV_TLB_FLUSH_FIFO_SIZE (16)
644 /*
645  * Note: the following 'magic' entry is made up by KVM to avoid putting
646  * anything besides GVA on the TLB flush fifo. It is theoretically possible
647  * to observe a request to flush 4095 PFNs starting from 0xfffffffffffff000
648  * which will look identical. KVM's action to 'flush everything' instead of
649  * flushing these particular addresses is, however, fully legitimate as
650  * flushing more than requested is always OK.
651  */
652 #define KVM_HV_TLB_FLUSHALL_ENTRY  ((u64)-1)
653 
654 enum hv_tlb_flush_fifos {
655 	HV_L1_TLB_FLUSH_FIFO,
656 	HV_L2_TLB_FLUSH_FIFO,
657 	HV_NR_TLB_FLUSH_FIFOS,
658 };
659 
660 struct kvm_vcpu_hv_tlb_flush_fifo {
661 	spinlock_t write_lock;
662 	DECLARE_KFIFO(entries, u64, KVM_HV_TLB_FLUSH_FIFO_SIZE);
663 };
664 
665 /* Hyper-V per vcpu emulation context */
666 struct kvm_vcpu_hv {
667 	struct kvm_vcpu *vcpu;
668 	u32 vp_index;
669 	u64 hv_vapic;
670 	s64 runtime_offset;
671 	struct kvm_vcpu_hv_synic synic;
672 	struct kvm_hyperv_exit exit;
673 	struct kvm_vcpu_hv_stimer stimer[HV_SYNIC_STIMER_COUNT];
674 	DECLARE_BITMAP(stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT);
675 	bool enforce_cpuid;
676 	struct {
677 		u32 features_eax; /* HYPERV_CPUID_FEATURES.EAX */
678 		u32 features_ebx; /* HYPERV_CPUID_FEATURES.EBX */
679 		u32 features_edx; /* HYPERV_CPUID_FEATURES.EDX */
680 		u32 enlightenments_eax; /* HYPERV_CPUID_ENLIGHTMENT_INFO.EAX */
681 		u32 enlightenments_ebx; /* HYPERV_CPUID_ENLIGHTMENT_INFO.EBX */
682 		u32 syndbg_cap_eax; /* HYPERV_CPUID_SYNDBG_PLATFORM_CAPABILITIES.EAX */
683 		u32 nested_eax; /* HYPERV_CPUID_NESTED_FEATURES.EAX */
684 		u32 nested_ebx; /* HYPERV_CPUID_NESTED_FEATURES.EBX */
685 	} cpuid_cache;
686 
687 	struct kvm_vcpu_hv_tlb_flush_fifo tlb_flush_fifo[HV_NR_TLB_FLUSH_FIFOS];
688 
689 	/* Preallocated buffer for handling hypercalls passing sparse vCPU set */
690 	u64 sparse_banks[HV_MAX_SPARSE_VCPU_BANKS];
691 
692 	struct hv_vp_assist_page vp_assist_page;
693 
694 	struct {
695 		u64 pa_page_gpa;
696 		u64 vm_id;
697 		u32 vp_id;
698 	} nested;
699 };
700 
701 struct kvm_hypervisor_cpuid {
702 	u32 base;
703 	u32 limit;
704 };
705 
706 #ifdef CONFIG_KVM_XEN
707 /* Xen HVM per vcpu emulation context */
708 struct kvm_vcpu_xen {
709 	u64 hypercall_rip;
710 	u32 current_runstate;
711 	u8 upcall_vector;
712 	struct gfn_to_pfn_cache vcpu_info_cache;
713 	struct gfn_to_pfn_cache vcpu_time_info_cache;
714 	struct gfn_to_pfn_cache runstate_cache;
715 	struct gfn_to_pfn_cache runstate2_cache;
716 	u64 last_steal;
717 	u64 runstate_entry_time;
718 	u64 runstate_times[4];
719 	unsigned long evtchn_pending_sel;
720 	u32 vcpu_id; /* The Xen / ACPI vCPU ID */
721 	u32 timer_virq;
722 	u64 timer_expires; /* In guest epoch */
723 	atomic_t timer_pending;
724 	struct hrtimer timer;
725 	int poll_evtchn;
726 	struct timer_list poll_timer;
727 	struct kvm_hypervisor_cpuid cpuid;
728 };
729 #endif
730 
731 struct kvm_queued_exception {
732 	bool pending;
733 	bool injected;
734 	bool has_error_code;
735 	u8 vector;
736 	u32 error_code;
737 	unsigned long payload;
738 	bool has_payload;
739 };
740 
741 struct kvm_vcpu_arch {
742 	/*
743 	 * rip and regs accesses must go through
744 	 * kvm_{register,rip}_{read,write} functions.
745 	 */
746 	unsigned long regs[NR_VCPU_REGS];
747 	u32 regs_avail;
748 	u32 regs_dirty;
749 
750 	unsigned long cr0;
751 	unsigned long cr0_guest_owned_bits;
752 	unsigned long cr2;
753 	unsigned long cr3;
754 	unsigned long cr4;
755 	unsigned long cr4_guest_owned_bits;
756 	unsigned long cr4_guest_rsvd_bits;
757 	unsigned long cr8;
758 	u32 host_pkru;
759 	u32 pkru;
760 	u32 hflags;
761 	u64 efer;
762 	u64 apic_base;
763 	struct kvm_lapic *apic;    /* kernel irqchip context */
764 	bool load_eoi_exitmap_pending;
765 	DECLARE_BITMAP(ioapic_handled_vectors, 256);
766 	unsigned long apic_attention;
767 	int32_t apic_arb_prio;
768 	int mp_state;
769 	u64 ia32_misc_enable_msr;
770 	u64 smbase;
771 	u64 smi_count;
772 	bool at_instruction_boundary;
773 	bool tpr_access_reporting;
774 	bool xfd_no_write_intercept;
775 	u64 ia32_xss;
776 	u64 microcode_version;
777 	u64 arch_capabilities;
778 	u64 perf_capabilities;
779 
780 	/*
781 	 * Paging state of the vcpu
782 	 *
783 	 * If the vcpu runs in guest mode with two level paging this still saves
784 	 * the paging mode of the l1 guest. This context is always used to
785 	 * handle faults.
786 	 */
787 	struct kvm_mmu *mmu;
788 
789 	/* Non-nested MMU for L1 */
790 	struct kvm_mmu root_mmu;
791 
792 	/* L1 MMU when running nested */
793 	struct kvm_mmu guest_mmu;
794 
795 	/*
796 	 * Paging state of an L2 guest (used for nested npt)
797 	 *
798 	 * This context will save all necessary information to walk page tables
799 	 * of an L2 guest. This context is only initialized for page table
800 	 * walking and not for faulting since we never handle l2 page faults on
801 	 * the host.
802 	 */
803 	struct kvm_mmu nested_mmu;
804 
805 	/*
806 	 * Pointer to the mmu context currently used for
807 	 * gva_to_gpa translations.
808 	 */
809 	struct kvm_mmu *walk_mmu;
810 
811 	struct kvm_mmu_memory_cache mmu_pte_list_desc_cache;
812 	struct kvm_mmu_memory_cache mmu_shadow_page_cache;
813 	struct kvm_mmu_memory_cache mmu_shadowed_info_cache;
814 	struct kvm_mmu_memory_cache mmu_page_header_cache;
815 
816 	/*
817 	 * QEMU userspace and the guest each have their own FPU state.
818 	 * In vcpu_run, we switch between the user and guest FPU contexts.
819 	 * While running a VCPU, the VCPU thread will have the guest FPU
820 	 * context.
821 	 *
822 	 * Note that while the PKRU state lives inside the fpu registers,
823 	 * it is switched out separately at VMENTER and VMEXIT time. The
824 	 * "guest_fpstate" state here contains the guest FPU context, with the
825 	 * host PRKU bits.
826 	 */
827 	struct fpu_guest guest_fpu;
828 
829 	u64 xcr0;
830 	u64 guest_supported_xcr0;
831 
832 	struct kvm_pio_request pio;
833 	void *pio_data;
834 	void *sev_pio_data;
835 	unsigned sev_pio_count;
836 
837 	u8 event_exit_inst_len;
838 
839 	bool exception_from_userspace;
840 
841 	/* Exceptions to be injected to the guest. */
842 	struct kvm_queued_exception exception;
843 	/* Exception VM-Exits to be synthesized to L1. */
844 	struct kvm_queued_exception exception_vmexit;
845 
846 	struct kvm_queued_interrupt {
847 		bool injected;
848 		bool soft;
849 		u8 nr;
850 	} interrupt;
851 
852 	int halt_request; /* real mode on Intel only */
853 
854 	int cpuid_nent;
855 	struct kvm_cpuid_entry2 *cpuid_entries;
856 	struct kvm_hypervisor_cpuid kvm_cpuid;
857 	bool is_amd_compatible;
858 
859 	/*
860 	 * FIXME: Drop this macro and use KVM_NR_GOVERNED_FEATURES directly
861 	 * when "struct kvm_vcpu_arch" is no longer defined in an
862 	 * arch/x86/include/asm header.  The max is mostly arbitrary, i.e.
863 	 * can be increased as necessary.
864 	 */
865 #define KVM_MAX_NR_GOVERNED_FEATURES BITS_PER_LONG
866 
867 	/*
868 	 * Track whether or not the guest is allowed to use features that are
869 	 * governed by KVM, where "governed" means KVM needs to manage state
870 	 * and/or explicitly enable the feature in hardware.  Typically, but
871 	 * not always, governed features can be used by the guest if and only
872 	 * if both KVM and userspace want to expose the feature to the guest.
873 	 */
874 	struct {
875 		DECLARE_BITMAP(enabled, KVM_MAX_NR_GOVERNED_FEATURES);
876 	} governed_features;
877 
878 	u64 reserved_gpa_bits;
879 	int maxphyaddr;
880 
881 	/* emulate context */
882 
883 	struct x86_emulate_ctxt *emulate_ctxt;
884 	bool emulate_regs_need_sync_to_vcpu;
885 	bool emulate_regs_need_sync_from_vcpu;
886 	int (*complete_userspace_io)(struct kvm_vcpu *vcpu);
887 
888 	gpa_t time;
889 	struct pvclock_vcpu_time_info hv_clock;
890 	unsigned int hw_tsc_khz;
891 	struct gfn_to_pfn_cache pv_time;
892 	/* set guest stopped flag in pvclock flags field */
893 	bool pvclock_set_guest_stopped_request;
894 
895 	struct {
896 		u8 preempted;
897 		u64 msr_val;
898 		u64 last_steal;
899 		struct gfn_to_hva_cache cache;
900 	} st;
901 
902 	u64 l1_tsc_offset;
903 	u64 tsc_offset; /* current tsc offset */
904 	u64 last_guest_tsc;
905 	u64 last_host_tsc;
906 	u64 tsc_offset_adjustment;
907 	u64 this_tsc_nsec;
908 	u64 this_tsc_write;
909 	u64 this_tsc_generation;
910 	bool tsc_catchup;
911 	bool tsc_always_catchup;
912 	s8 virtual_tsc_shift;
913 	u32 virtual_tsc_mult;
914 	u32 virtual_tsc_khz;
915 	s64 ia32_tsc_adjust_msr;
916 	u64 msr_ia32_power_ctl;
917 	u64 l1_tsc_scaling_ratio;
918 	u64 tsc_scaling_ratio; /* current scaling ratio */
919 
920 	atomic_t nmi_queued;  /* unprocessed asynchronous NMIs */
921 	/* Number of NMIs pending injection, not including hardware vNMIs. */
922 	unsigned int nmi_pending;
923 	bool nmi_injected;    /* Trying to inject an NMI this entry */
924 	bool smi_pending;    /* SMI queued after currently running handler */
925 	u8 handling_intr_from_guest;
926 
927 	struct kvm_mtrr mtrr_state;
928 	u64 pat;
929 
930 	unsigned switch_db_regs;
931 	unsigned long db[KVM_NR_DB_REGS];
932 	unsigned long dr6;
933 	unsigned long dr7;
934 	unsigned long eff_db[KVM_NR_DB_REGS];
935 	unsigned long guest_debug_dr7;
936 	u64 msr_platform_info;
937 	u64 msr_misc_features_enables;
938 
939 	u64 mcg_cap;
940 	u64 mcg_status;
941 	u64 mcg_ctl;
942 	u64 mcg_ext_ctl;
943 	u64 *mce_banks;
944 	u64 *mci_ctl2_banks;
945 
946 	/* Cache MMIO info */
947 	u64 mmio_gva;
948 	unsigned mmio_access;
949 	gfn_t mmio_gfn;
950 	u64 mmio_gen;
951 
952 	struct kvm_pmu pmu;
953 
954 	/* used for guest single stepping over the given code position */
955 	unsigned long singlestep_rip;
956 
957 #ifdef CONFIG_KVM_HYPERV
958 	bool hyperv_enabled;
959 	struct kvm_vcpu_hv *hyperv;
960 #endif
961 #ifdef CONFIG_KVM_XEN
962 	struct kvm_vcpu_xen xen;
963 #endif
964 	cpumask_var_t wbinvd_dirty_mask;
965 
966 	unsigned long last_retry_eip;
967 	unsigned long last_retry_addr;
968 
969 	struct {
970 		bool halted;
971 		gfn_t gfns[ASYNC_PF_PER_VCPU];
972 		struct gfn_to_hva_cache data;
973 		u64 msr_en_val; /* MSR_KVM_ASYNC_PF_EN */
974 		u64 msr_int_val; /* MSR_KVM_ASYNC_PF_INT */
975 		u16 vec;
976 		u32 id;
977 		bool send_user_only;
978 		u32 host_apf_flags;
979 		bool delivery_as_pf_vmexit;
980 		bool pageready_pending;
981 	} apf;
982 
983 	/* OSVW MSRs (AMD only) */
984 	struct {
985 		u64 length;
986 		u64 status;
987 	} osvw;
988 
989 	struct {
990 		u64 msr_val;
991 		struct gfn_to_hva_cache data;
992 	} pv_eoi;
993 
994 	u64 msr_kvm_poll_control;
995 
996 	/* pv related host specific info */
997 	struct {
998 		bool pv_unhalted;
999 	} pv;
1000 
1001 	int pending_ioapic_eoi;
1002 	int pending_external_vector;
1003 
1004 	/* be preempted when it's in kernel-mode(cpl=0) */
1005 	bool preempted_in_kernel;
1006 
1007 	/* Flush the L1 Data cache for L1TF mitigation on VMENTER */
1008 	bool l1tf_flush_l1d;
1009 
1010 	/* Host CPU on which VM-entry was most recently attempted */
1011 	int last_vmentry_cpu;
1012 
1013 	/* AMD MSRC001_0015 Hardware Configuration */
1014 	u64 msr_hwcr;
1015 
1016 	/* pv related cpuid info */
1017 	struct {
1018 		/*
1019 		 * value of the eax register in the KVM_CPUID_FEATURES CPUID
1020 		 * leaf.
1021 		 */
1022 		u32 features;
1023 
1024 		/*
1025 		 * indicates whether pv emulation should be disabled if features
1026 		 * are not present in the guest's cpuid
1027 		 */
1028 		bool enforce;
1029 	} pv_cpuid;
1030 
1031 	/* Protected Guests */
1032 	bool guest_state_protected;
1033 
1034 	/*
1035 	 * Set when PDPTS were loaded directly by the userspace without
1036 	 * reading the guest memory
1037 	 */
1038 	bool pdptrs_from_userspace;
1039 
1040 #if IS_ENABLED(CONFIG_HYPERV)
1041 	hpa_t hv_root_tdp;
1042 #endif
1043 };
1044 
1045 struct kvm_lpage_info {
1046 	int disallow_lpage;
1047 };
1048 
1049 struct kvm_arch_memory_slot {
1050 	struct kvm_rmap_head *rmap[KVM_NR_PAGE_SIZES];
1051 	struct kvm_lpage_info *lpage_info[KVM_NR_PAGE_SIZES - 1];
1052 	unsigned short *gfn_write_track;
1053 };
1054 
1055 /*
1056  * Track the mode of the optimized logical map, as the rules for decoding the
1057  * destination vary per mode.  Enabling the optimized logical map requires all
1058  * software-enabled local APIs to be in the same mode, each addressable APIC to
1059  * be mapped to only one MDA, and each MDA to map to at most one APIC.
1060  */
1061 enum kvm_apic_logical_mode {
1062 	/* All local APICs are software disabled. */
1063 	KVM_APIC_MODE_SW_DISABLED,
1064 	/* All software enabled local APICs in xAPIC cluster addressing mode. */
1065 	KVM_APIC_MODE_XAPIC_CLUSTER,
1066 	/* All software enabled local APICs in xAPIC flat addressing mode. */
1067 	KVM_APIC_MODE_XAPIC_FLAT,
1068 	/* All software enabled local APICs in x2APIC mode. */
1069 	KVM_APIC_MODE_X2APIC,
1070 	/*
1071 	 * Optimized map disabled, e.g. not all local APICs in the same logical
1072 	 * mode, same logical ID assigned to multiple APICs, etc.
1073 	 */
1074 	KVM_APIC_MODE_MAP_DISABLED,
1075 };
1076 
1077 struct kvm_apic_map {
1078 	struct rcu_head rcu;
1079 	enum kvm_apic_logical_mode logical_mode;
1080 	u32 max_apic_id;
1081 	union {
1082 		struct kvm_lapic *xapic_flat_map[8];
1083 		struct kvm_lapic *xapic_cluster_map[16][4];
1084 	};
1085 	struct kvm_lapic *phys_map[];
1086 };
1087 
1088 /* Hyper-V synthetic debugger (SynDbg)*/
1089 struct kvm_hv_syndbg {
1090 	struct {
1091 		u64 control;
1092 		u64 status;
1093 		u64 send_page;
1094 		u64 recv_page;
1095 		u64 pending_page;
1096 	} control;
1097 	u64 options;
1098 };
1099 
1100 /* Current state of Hyper-V TSC page clocksource */
1101 enum hv_tsc_page_status {
1102 	/* TSC page was not set up or disabled */
1103 	HV_TSC_PAGE_UNSET = 0,
1104 	/* TSC page MSR was written by the guest, update pending */
1105 	HV_TSC_PAGE_GUEST_CHANGED,
1106 	/* TSC page update was triggered from the host side */
1107 	HV_TSC_PAGE_HOST_CHANGED,
1108 	/* TSC page was properly set up and is currently active  */
1109 	HV_TSC_PAGE_SET,
1110 	/* TSC page was set up with an inaccessible GPA */
1111 	HV_TSC_PAGE_BROKEN,
1112 };
1113 
1114 #ifdef CONFIG_KVM_HYPERV
1115 /* Hyper-V emulation context */
1116 struct kvm_hv {
1117 	struct mutex hv_lock;
1118 	u64 hv_guest_os_id;
1119 	u64 hv_hypercall;
1120 	u64 hv_tsc_page;
1121 	enum hv_tsc_page_status hv_tsc_page_status;
1122 
1123 	/* Hyper-v based guest crash (NT kernel bugcheck) parameters */
1124 	u64 hv_crash_param[HV_X64_MSR_CRASH_PARAMS];
1125 	u64 hv_crash_ctl;
1126 
1127 	struct ms_hyperv_tsc_page tsc_ref;
1128 
1129 	struct idr conn_to_evt;
1130 
1131 	u64 hv_reenlightenment_control;
1132 	u64 hv_tsc_emulation_control;
1133 	u64 hv_tsc_emulation_status;
1134 	u64 hv_invtsc_control;
1135 
1136 	/* How many vCPUs have VP index != vCPU index */
1137 	atomic_t num_mismatched_vp_indexes;
1138 
1139 	/*
1140 	 * How many SynICs use 'AutoEOI' feature
1141 	 * (protected by arch.apicv_update_lock)
1142 	 */
1143 	unsigned int synic_auto_eoi_used;
1144 
1145 	struct kvm_hv_syndbg hv_syndbg;
1146 
1147 	bool xsaves_xsavec_checked;
1148 };
1149 #endif
1150 
1151 struct msr_bitmap_range {
1152 	u32 flags;
1153 	u32 nmsrs;
1154 	u32 base;
1155 	unsigned long *bitmap;
1156 };
1157 
1158 #ifdef CONFIG_KVM_XEN
1159 /* Xen emulation context */
1160 struct kvm_xen {
1161 	struct mutex xen_lock;
1162 	u32 xen_version;
1163 	bool long_mode;
1164 	bool runstate_update_flag;
1165 	u8 upcall_vector;
1166 	struct gfn_to_pfn_cache shinfo_cache;
1167 	struct idr evtchn_ports;
1168 	unsigned long poll_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
1169 };
1170 #endif
1171 
1172 enum kvm_irqchip_mode {
1173 	KVM_IRQCHIP_NONE,
1174 	KVM_IRQCHIP_KERNEL,       /* created with KVM_CREATE_IRQCHIP */
1175 	KVM_IRQCHIP_SPLIT,        /* created with KVM_CAP_SPLIT_IRQCHIP */
1176 };
1177 
1178 struct kvm_x86_msr_filter {
1179 	u8 count;
1180 	bool default_allow:1;
1181 	struct msr_bitmap_range ranges[16];
1182 };
1183 
1184 struct kvm_x86_pmu_event_filter {
1185 	__u32 action;
1186 	__u32 nevents;
1187 	__u32 fixed_counter_bitmap;
1188 	__u32 flags;
1189 	__u32 nr_includes;
1190 	__u32 nr_excludes;
1191 	__u64 *includes;
1192 	__u64 *excludes;
1193 	__u64 events[];
1194 };
1195 
1196 enum kvm_apicv_inhibit {
1197 
1198 	/********************************************************************/
1199 	/* INHIBITs that are relevant to both Intel's APICv and AMD's AVIC. */
1200 	/********************************************************************/
1201 
1202 	/*
1203 	 * APIC acceleration is disabled by a module parameter
1204 	 * and/or not supported in hardware.
1205 	 */
1206 	APICV_INHIBIT_REASON_DISABLED,
1207 
1208 	/*
1209 	 * APIC acceleration is inhibited because AutoEOI feature is
1210 	 * being used by a HyperV guest.
1211 	 */
1212 	APICV_INHIBIT_REASON_HYPERV,
1213 
1214 	/*
1215 	 * APIC acceleration is inhibited because the userspace didn't yet
1216 	 * enable the kernel/split irqchip.
1217 	 */
1218 	APICV_INHIBIT_REASON_ABSENT,
1219 
1220 	/* APIC acceleration is inhibited because KVM_GUESTDBG_BLOCKIRQ
1221 	 * (out of band, debug measure of blocking all interrupts on this vCPU)
1222 	 * was enabled, to avoid AVIC/APICv bypassing it.
1223 	 */
1224 	APICV_INHIBIT_REASON_BLOCKIRQ,
1225 
1226 	/*
1227 	 * APICv is disabled because not all vCPUs have a 1:1 mapping between
1228 	 * APIC ID and vCPU, _and_ KVM is not applying its x2APIC hotplug hack.
1229 	 */
1230 	APICV_INHIBIT_REASON_PHYSICAL_ID_ALIASED,
1231 
1232 	/*
1233 	 * For simplicity, the APIC acceleration is inhibited
1234 	 * first time either APIC ID or APIC base are changed by the guest
1235 	 * from their reset values.
1236 	 */
1237 	APICV_INHIBIT_REASON_APIC_ID_MODIFIED,
1238 	APICV_INHIBIT_REASON_APIC_BASE_MODIFIED,
1239 
1240 	/******************************************************/
1241 	/* INHIBITs that are relevant only to the AMD's AVIC. */
1242 	/******************************************************/
1243 
1244 	/*
1245 	 * AVIC is inhibited on a vCPU because it runs a nested guest.
1246 	 *
1247 	 * This is needed because unlike APICv, the peers of this vCPU
1248 	 * cannot use the doorbell mechanism to signal interrupts via AVIC when
1249 	 * a vCPU runs nested.
1250 	 */
1251 	APICV_INHIBIT_REASON_NESTED,
1252 
1253 	/*
1254 	 * On SVM, the wait for the IRQ window is implemented with pending vIRQ,
1255 	 * which cannot be injected when the AVIC is enabled, thus AVIC
1256 	 * is inhibited while KVM waits for IRQ window.
1257 	 */
1258 	APICV_INHIBIT_REASON_IRQWIN,
1259 
1260 	/*
1261 	 * PIT (i8254) 're-inject' mode, relies on EOI intercept,
1262 	 * which AVIC doesn't support for edge triggered interrupts.
1263 	 */
1264 	APICV_INHIBIT_REASON_PIT_REINJ,
1265 
1266 	/*
1267 	 * AVIC is disabled because SEV doesn't support it.
1268 	 */
1269 	APICV_INHIBIT_REASON_SEV,
1270 
1271 	/*
1272 	 * AVIC is disabled because not all vCPUs with a valid LDR have a 1:1
1273 	 * mapping between logical ID and vCPU.
1274 	 */
1275 	APICV_INHIBIT_REASON_LOGICAL_ID_ALIASED,
1276 
1277 	NR_APICV_INHIBIT_REASONS,
1278 };
1279 
1280 #define __APICV_INHIBIT_REASON(reason)			\
1281 	{ BIT(APICV_INHIBIT_REASON_##reason), #reason }
1282 
1283 #define APICV_INHIBIT_REASONS				\
1284 	__APICV_INHIBIT_REASON(DISABLED),		\
1285 	__APICV_INHIBIT_REASON(HYPERV),			\
1286 	__APICV_INHIBIT_REASON(ABSENT),			\
1287 	__APICV_INHIBIT_REASON(BLOCKIRQ),		\
1288 	__APICV_INHIBIT_REASON(PHYSICAL_ID_ALIASED),	\
1289 	__APICV_INHIBIT_REASON(APIC_ID_MODIFIED),	\
1290 	__APICV_INHIBIT_REASON(APIC_BASE_MODIFIED),	\
1291 	__APICV_INHIBIT_REASON(NESTED),			\
1292 	__APICV_INHIBIT_REASON(IRQWIN),			\
1293 	__APICV_INHIBIT_REASON(PIT_REINJ),		\
1294 	__APICV_INHIBIT_REASON(SEV),			\
1295 	__APICV_INHIBIT_REASON(LOGICAL_ID_ALIASED)
1296 
1297 struct kvm_arch {
1298 	unsigned long n_used_mmu_pages;
1299 	unsigned long n_requested_mmu_pages;
1300 	unsigned long n_max_mmu_pages;
1301 	unsigned int indirect_shadow_pages;
1302 	u8 mmu_valid_gen;
1303 	u8 vm_type;
1304 	bool has_private_mem;
1305 	bool has_protected_state;
1306 	bool pre_fault_allowed;
1307 	struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
1308 	struct list_head active_mmu_pages;
1309 	struct list_head zapped_obsolete_pages;
1310 	/*
1311 	 * A list of kvm_mmu_page structs that, if zapped, could possibly be
1312 	 * replaced by an NX huge page.  A shadow page is on this list if its
1313 	 * existence disallows an NX huge page (nx_huge_page_disallowed is set)
1314 	 * and there are no other conditions that prevent a huge page, e.g.
1315 	 * the backing host page is huge, dirtly logging is not enabled for its
1316 	 * memslot, etc...  Note, zapping shadow pages on this list doesn't
1317 	 * guarantee an NX huge page will be created in its stead, e.g. if the
1318 	 * guest attempts to execute from the region then KVM obviously can't
1319 	 * create an NX huge page (without hanging the guest).
1320 	 */
1321 	struct list_head possible_nx_huge_pages;
1322 #ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
1323 	struct kvm_page_track_notifier_head track_notifier_head;
1324 #endif
1325 	/*
1326 	 * Protects marking pages unsync during page faults, as TDP MMU page
1327 	 * faults only take mmu_lock for read.  For simplicity, the unsync
1328 	 * pages lock is always taken when marking pages unsync regardless of
1329 	 * whether mmu_lock is held for read or write.
1330 	 */
1331 	spinlock_t mmu_unsync_pages_lock;
1332 
1333 	u64 shadow_mmio_value;
1334 
1335 	struct iommu_domain *iommu_domain;
1336 	bool iommu_noncoherent;
1337 #define __KVM_HAVE_ARCH_NONCOHERENT_DMA
1338 	atomic_t noncoherent_dma_count;
1339 #define __KVM_HAVE_ARCH_ASSIGNED_DEVICE
1340 	atomic_t assigned_device_count;
1341 	struct kvm_pic *vpic;
1342 	struct kvm_ioapic *vioapic;
1343 	struct kvm_pit *vpit;
1344 	atomic_t vapics_in_nmi_mode;
1345 	struct mutex apic_map_lock;
1346 	struct kvm_apic_map __rcu *apic_map;
1347 	atomic_t apic_map_dirty;
1348 
1349 	bool apic_access_memslot_enabled;
1350 	bool apic_access_memslot_inhibited;
1351 
1352 	/* Protects apicv_inhibit_reasons */
1353 	struct rw_semaphore apicv_update_lock;
1354 	unsigned long apicv_inhibit_reasons;
1355 
1356 	gpa_t wall_clock;
1357 
1358 	bool mwait_in_guest;
1359 	bool hlt_in_guest;
1360 	bool pause_in_guest;
1361 	bool cstate_in_guest;
1362 
1363 	unsigned long irq_sources_bitmap;
1364 	s64 kvmclock_offset;
1365 
1366 	/*
1367 	 * This also protects nr_vcpus_matched_tsc which is read from a
1368 	 * preemption-disabled region, so it must be a raw spinlock.
1369 	 */
1370 	raw_spinlock_t tsc_write_lock;
1371 	u64 last_tsc_nsec;
1372 	u64 last_tsc_write;
1373 	u32 last_tsc_khz;
1374 	u64 last_tsc_offset;
1375 	u64 cur_tsc_nsec;
1376 	u64 cur_tsc_write;
1377 	u64 cur_tsc_offset;
1378 	u64 cur_tsc_generation;
1379 	int nr_vcpus_matched_tsc;
1380 
1381 	u32 default_tsc_khz;
1382 	bool user_set_tsc;
1383 	u64 apic_bus_cycle_ns;
1384 
1385 	seqcount_raw_spinlock_t pvclock_sc;
1386 	bool use_master_clock;
1387 	u64 master_kernel_ns;
1388 	u64 master_cycle_now;
1389 	struct delayed_work kvmclock_update_work;
1390 	struct delayed_work kvmclock_sync_work;
1391 
1392 	struct kvm_xen_hvm_config xen_hvm_config;
1393 
1394 	/* reads protected by irq_srcu, writes by irq_lock */
1395 	struct hlist_head mask_notifier_list;
1396 
1397 #ifdef CONFIG_KVM_HYPERV
1398 	struct kvm_hv hyperv;
1399 #endif
1400 
1401 #ifdef CONFIG_KVM_XEN
1402 	struct kvm_xen xen;
1403 #endif
1404 
1405 	bool backwards_tsc_observed;
1406 	bool boot_vcpu_runs_old_kvmclock;
1407 	u32 bsp_vcpu_id;
1408 
1409 	u64 disabled_quirks;
1410 
1411 	enum kvm_irqchip_mode irqchip_mode;
1412 	u8 nr_reserved_ioapic_pins;
1413 
1414 	bool disabled_lapic_found;
1415 
1416 	bool x2apic_format;
1417 	bool x2apic_broadcast_quirk_disabled;
1418 
1419 	bool guest_can_read_msr_platform_info;
1420 	bool exception_payload_enabled;
1421 
1422 	bool triple_fault_event;
1423 
1424 	bool bus_lock_detection_enabled;
1425 	bool enable_pmu;
1426 
1427 	u32 notify_window;
1428 	u32 notify_vmexit_flags;
1429 	/*
1430 	 * If exit_on_emulation_error is set, and the in-kernel instruction
1431 	 * emulator fails to emulate an instruction, allow userspace
1432 	 * the opportunity to look at it.
1433 	 */
1434 	bool exit_on_emulation_error;
1435 
1436 	/* Deflect RDMSR and WRMSR to user space when they trigger a #GP */
1437 	u32 user_space_msr_mask;
1438 	struct kvm_x86_msr_filter __rcu *msr_filter;
1439 
1440 	u32 hypercall_exit_enabled;
1441 
1442 	/* Guest can access the SGX PROVISIONKEY. */
1443 	bool sgx_provisioning_allowed;
1444 
1445 	struct kvm_x86_pmu_event_filter __rcu *pmu_event_filter;
1446 	struct task_struct *nx_huge_page_recovery_thread;
1447 
1448 #ifdef CONFIG_X86_64
1449 	/* The number of TDP MMU pages across all roots. */
1450 	atomic64_t tdp_mmu_pages;
1451 
1452 	/*
1453 	 * List of struct kvm_mmu_pages being used as roots.
1454 	 * All struct kvm_mmu_pages in the list should have
1455 	 * tdp_mmu_page set.
1456 	 *
1457 	 * For reads, this list is protected by:
1458 	 *	the MMU lock in read mode + RCU or
1459 	 *	the MMU lock in write mode
1460 	 *
1461 	 * For writes, this list is protected by tdp_mmu_pages_lock; see
1462 	 * below for the details.
1463 	 *
1464 	 * Roots will remain in the list until their tdp_mmu_root_count
1465 	 * drops to zero, at which point the thread that decremented the
1466 	 * count to zero should removed the root from the list and clean
1467 	 * it up, freeing the root after an RCU grace period.
1468 	 */
1469 	struct list_head tdp_mmu_roots;
1470 
1471 	/*
1472 	 * Protects accesses to the following fields when the MMU lock
1473 	 * is held in read mode:
1474 	 *  - tdp_mmu_roots (above)
1475 	 *  - the link field of kvm_mmu_page structs used by the TDP MMU
1476 	 *  - possible_nx_huge_pages;
1477 	 *  - the possible_nx_huge_page_link field of kvm_mmu_page structs used
1478 	 *    by the TDP MMU
1479 	 * Because the lock is only taken within the MMU lock, strictly
1480 	 * speaking it is redundant to acquire this lock when the thread
1481 	 * holds the MMU lock in write mode.  However it often simplifies
1482 	 * the code to do so.
1483 	 */
1484 	spinlock_t tdp_mmu_pages_lock;
1485 #endif /* CONFIG_X86_64 */
1486 
1487 	/*
1488 	 * If set, at least one shadow root has been allocated. This flag
1489 	 * is used as one input when determining whether certain memslot
1490 	 * related allocations are necessary.
1491 	 */
1492 	bool shadow_root_allocated;
1493 
1494 #ifdef CONFIG_KVM_EXTERNAL_WRITE_TRACKING
1495 	/*
1496 	 * If set, the VM has (or had) an external write tracking user, and
1497 	 * thus all write tracking metadata has been allocated, even if KVM
1498 	 * itself isn't using write tracking.
1499 	 */
1500 	bool external_write_tracking_enabled;
1501 #endif
1502 
1503 #if IS_ENABLED(CONFIG_HYPERV)
1504 	hpa_t	hv_root_tdp;
1505 	spinlock_t hv_root_tdp_lock;
1506 	struct hv_partition_assist_pg *hv_pa_pg;
1507 #endif
1508 	/*
1509 	 * VM-scope maximum vCPU ID. Used to determine the size of structures
1510 	 * that increase along with the maximum vCPU ID, in which case, using
1511 	 * the global KVM_MAX_VCPU_IDS may lead to significant memory waste.
1512 	 */
1513 	u32 max_vcpu_ids;
1514 
1515 	bool disable_nx_huge_pages;
1516 
1517 	/*
1518 	 * Memory caches used to allocate shadow pages when performing eager
1519 	 * page splitting. No need for a shadowed_info_cache since eager page
1520 	 * splitting only allocates direct shadow pages.
1521 	 *
1522 	 * Protected by kvm->slots_lock.
1523 	 */
1524 	struct kvm_mmu_memory_cache split_shadow_page_cache;
1525 	struct kvm_mmu_memory_cache split_page_header_cache;
1526 
1527 	/*
1528 	 * Memory cache used to allocate pte_list_desc structs while splitting
1529 	 * huge pages. In the worst case, to split one huge page, 512
1530 	 * pte_list_desc structs are needed to add each lower level leaf sptep
1531 	 * to the rmap plus 1 to extend the parent_ptes rmap of the lower level
1532 	 * page table.
1533 	 *
1534 	 * Protected by kvm->slots_lock.
1535 	 */
1536 #define SPLIT_DESC_CACHE_MIN_NR_OBJECTS (SPTE_ENT_PER_PAGE + 1)
1537 	struct kvm_mmu_memory_cache split_desc_cache;
1538 };
1539 
1540 struct kvm_vm_stat {
1541 	struct kvm_vm_stat_generic generic;
1542 	u64 mmu_shadow_zapped;
1543 	u64 mmu_pte_write;
1544 	u64 mmu_pde_zapped;
1545 	u64 mmu_flooded;
1546 	u64 mmu_recycled;
1547 	u64 mmu_cache_miss;
1548 	u64 mmu_unsync;
1549 	union {
1550 		struct {
1551 			atomic64_t pages_4k;
1552 			atomic64_t pages_2m;
1553 			atomic64_t pages_1g;
1554 		};
1555 		atomic64_t pages[KVM_NR_PAGE_SIZES];
1556 	};
1557 	u64 nx_lpage_splits;
1558 	u64 max_mmu_page_hash_collisions;
1559 	u64 max_mmu_rmap_size;
1560 };
1561 
1562 struct kvm_vcpu_stat {
1563 	struct kvm_vcpu_stat_generic generic;
1564 	u64 pf_taken;
1565 	u64 pf_fixed;
1566 	u64 pf_emulate;
1567 	u64 pf_spurious;
1568 	u64 pf_fast;
1569 	u64 pf_mmio_spte_created;
1570 	u64 pf_guest;
1571 	u64 tlb_flush;
1572 	u64 invlpg;
1573 
1574 	u64 exits;
1575 	u64 io_exits;
1576 	u64 mmio_exits;
1577 	u64 signal_exits;
1578 	u64 irq_window_exits;
1579 	u64 nmi_window_exits;
1580 	u64 l1d_flush;
1581 	u64 halt_exits;
1582 	u64 request_irq_exits;
1583 	u64 irq_exits;
1584 	u64 host_state_reload;
1585 	u64 fpu_reload;
1586 	u64 insn_emulation;
1587 	u64 insn_emulation_fail;
1588 	u64 hypercalls;
1589 	u64 irq_injections;
1590 	u64 nmi_injections;
1591 	u64 req_event;
1592 	u64 nested_run;
1593 	u64 directed_yield_attempted;
1594 	u64 directed_yield_successful;
1595 	u64 preemption_reported;
1596 	u64 preemption_other;
1597 	u64 guest_mode;
1598 	u64 notify_window_exits;
1599 };
1600 
1601 struct x86_instruction_info;
1602 
1603 struct msr_data {
1604 	bool host_initiated;
1605 	u32 index;
1606 	u64 data;
1607 };
1608 
1609 struct kvm_lapic_irq {
1610 	u32 vector;
1611 	u16 delivery_mode;
1612 	u16 dest_mode;
1613 	bool level;
1614 	u16 trig_mode;
1615 	u32 shorthand;
1616 	u32 dest_id;
1617 	bool msi_redir_hint;
1618 };
1619 
1620 static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode_logical)
1621 {
1622 	return dest_mode_logical ? APIC_DEST_LOGICAL : APIC_DEST_PHYSICAL;
1623 }
1624 
1625 struct kvm_x86_ops {
1626 	const char *name;
1627 
1628 	int (*check_processor_compatibility)(void);
1629 
1630 	int (*enable_virtualization_cpu)(void);
1631 	void (*disable_virtualization_cpu)(void);
1632 	cpu_emergency_virt_cb *emergency_disable_virtualization_cpu;
1633 
1634 	void (*hardware_unsetup)(void);
1635 	bool (*has_emulated_msr)(struct kvm *kvm, u32 index);
1636 	void (*vcpu_after_set_cpuid)(struct kvm_vcpu *vcpu);
1637 
1638 	unsigned int vm_size;
1639 	int (*vm_init)(struct kvm *kvm);
1640 	void (*vm_destroy)(struct kvm *kvm);
1641 
1642 	/* Create, but do not attach this VCPU */
1643 	int (*vcpu_precreate)(struct kvm *kvm);
1644 	int (*vcpu_create)(struct kvm_vcpu *vcpu);
1645 	void (*vcpu_free)(struct kvm_vcpu *vcpu);
1646 	void (*vcpu_reset)(struct kvm_vcpu *vcpu, bool init_event);
1647 
1648 	void (*prepare_switch_to_guest)(struct kvm_vcpu *vcpu);
1649 	void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
1650 	void (*vcpu_put)(struct kvm_vcpu *vcpu);
1651 
1652 	void (*update_exception_bitmap)(struct kvm_vcpu *vcpu);
1653 	int (*get_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr);
1654 	int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr);
1655 	u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
1656 	void (*get_segment)(struct kvm_vcpu *vcpu,
1657 			    struct kvm_segment *var, int seg);
1658 	int (*get_cpl)(struct kvm_vcpu *vcpu);
1659 	void (*set_segment)(struct kvm_vcpu *vcpu,
1660 			    struct kvm_segment *var, int seg);
1661 	void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
1662 	bool (*is_valid_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
1663 	void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
1664 	void (*post_set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
1665 	bool (*is_valid_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
1666 	void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
1667 	int (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
1668 	void (*get_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
1669 	void (*set_idt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
1670 	void (*get_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
1671 	void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
1672 	void (*sync_dirty_debug_regs)(struct kvm_vcpu *vcpu);
1673 	void (*set_dr7)(struct kvm_vcpu *vcpu, unsigned long value);
1674 	void (*cache_reg)(struct kvm_vcpu *vcpu, enum kvm_reg reg);
1675 	unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
1676 	void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
1677 	bool (*get_if_flag)(struct kvm_vcpu *vcpu);
1678 
1679 	void (*flush_tlb_all)(struct kvm_vcpu *vcpu);
1680 	void (*flush_tlb_current)(struct kvm_vcpu *vcpu);
1681 #if IS_ENABLED(CONFIG_HYPERV)
1682 	int  (*flush_remote_tlbs)(struct kvm *kvm);
1683 	int  (*flush_remote_tlbs_range)(struct kvm *kvm, gfn_t gfn,
1684 					gfn_t nr_pages);
1685 #endif
1686 
1687 	/*
1688 	 * Flush any TLB entries associated with the given GVA.
1689 	 * Does not need to flush GPA->HPA mappings.
1690 	 * Can potentially get non-canonical addresses through INVLPGs, which
1691 	 * the implementation may choose to ignore if appropriate.
1692 	 */
1693 	void (*flush_tlb_gva)(struct kvm_vcpu *vcpu, gva_t addr);
1694 
1695 	/*
1696 	 * Flush any TLB entries created by the guest.  Like tlb_flush_gva(),
1697 	 * does not need to flush GPA->HPA mappings.
1698 	 */
1699 	void (*flush_tlb_guest)(struct kvm_vcpu *vcpu);
1700 
1701 	int (*vcpu_pre_run)(struct kvm_vcpu *vcpu);
1702 	enum exit_fastpath_completion (*vcpu_run)(struct kvm_vcpu *vcpu,
1703 						  bool force_immediate_exit);
1704 	int (*handle_exit)(struct kvm_vcpu *vcpu,
1705 		enum exit_fastpath_completion exit_fastpath);
1706 	int (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
1707 	void (*update_emulated_instruction)(struct kvm_vcpu *vcpu);
1708 	void (*set_interrupt_shadow)(struct kvm_vcpu *vcpu, int mask);
1709 	u32 (*get_interrupt_shadow)(struct kvm_vcpu *vcpu);
1710 	void (*patch_hypercall)(struct kvm_vcpu *vcpu,
1711 				unsigned char *hypercall_addr);
1712 	void (*inject_irq)(struct kvm_vcpu *vcpu, bool reinjected);
1713 	void (*inject_nmi)(struct kvm_vcpu *vcpu);
1714 	void (*inject_exception)(struct kvm_vcpu *vcpu);
1715 	void (*cancel_injection)(struct kvm_vcpu *vcpu);
1716 	int (*interrupt_allowed)(struct kvm_vcpu *vcpu, bool for_injection);
1717 	int (*nmi_allowed)(struct kvm_vcpu *vcpu, bool for_injection);
1718 	bool (*get_nmi_mask)(struct kvm_vcpu *vcpu);
1719 	void (*set_nmi_mask)(struct kvm_vcpu *vcpu, bool masked);
1720 	/* Whether or not a virtual NMI is pending in hardware. */
1721 	bool (*is_vnmi_pending)(struct kvm_vcpu *vcpu);
1722 	/*
1723 	 * Attempt to pend a virtual NMI in hardware.  Returns %true on success
1724 	 * to allow using static_call_ret0 as the fallback.
1725 	 */
1726 	bool (*set_vnmi_pending)(struct kvm_vcpu *vcpu);
1727 	void (*enable_nmi_window)(struct kvm_vcpu *vcpu);
1728 	void (*enable_irq_window)(struct kvm_vcpu *vcpu);
1729 	void (*update_cr8_intercept)(struct kvm_vcpu *vcpu, int tpr, int irr);
1730 
1731 	const bool x2apic_icr_is_split;
1732 	const unsigned long required_apicv_inhibits;
1733 	bool allow_apicv_in_x2apic_without_x2apic_virtualization;
1734 	void (*refresh_apicv_exec_ctrl)(struct kvm_vcpu *vcpu);
1735 	void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr);
1736 	void (*hwapic_isr_update)(int isr);
1737 	void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
1738 	void (*set_virtual_apic_mode)(struct kvm_vcpu *vcpu);
1739 	void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu);
1740 	void (*deliver_interrupt)(struct kvm_lapic *apic, int delivery_mode,
1741 				  int trig_mode, int vector);
1742 	int (*sync_pir_to_irr)(struct kvm_vcpu *vcpu);
1743 	int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
1744 	int (*set_identity_map_addr)(struct kvm *kvm, u64 ident_addr);
1745 	u8 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
1746 
1747 	void (*load_mmu_pgd)(struct kvm_vcpu *vcpu, hpa_t root_hpa,
1748 			     int root_level);
1749 
1750 	bool (*has_wbinvd_exit)(void);
1751 
1752 	u64 (*get_l2_tsc_offset)(struct kvm_vcpu *vcpu);
1753 	u64 (*get_l2_tsc_multiplier)(struct kvm_vcpu *vcpu);
1754 	void (*write_tsc_offset)(struct kvm_vcpu *vcpu);
1755 	void (*write_tsc_multiplier)(struct kvm_vcpu *vcpu);
1756 
1757 	/*
1758 	 * Retrieve somewhat arbitrary exit information.  Intended to
1759 	 * be used only from within tracepoints or error paths.
1760 	 */
1761 	void (*get_exit_info)(struct kvm_vcpu *vcpu, u32 *reason,
1762 			      u64 *info1, u64 *info2,
1763 			      u32 *exit_int_info, u32 *exit_int_info_err_code);
1764 
1765 	int (*check_intercept)(struct kvm_vcpu *vcpu,
1766 			       struct x86_instruction_info *info,
1767 			       enum x86_intercept_stage stage,
1768 			       struct x86_exception *exception);
1769 	void (*handle_exit_irqoff)(struct kvm_vcpu *vcpu);
1770 
1771 	/*
1772 	 * Size of the CPU's dirty log buffer, i.e. VMX's PML buffer.  A zero
1773 	 * value indicates CPU dirty logging is unsupported or disabled.
1774 	 */
1775 	int cpu_dirty_log_size;
1776 	void (*update_cpu_dirty_logging)(struct kvm_vcpu *vcpu);
1777 
1778 	const struct kvm_x86_nested_ops *nested_ops;
1779 
1780 	void (*vcpu_blocking)(struct kvm_vcpu *vcpu);
1781 	void (*vcpu_unblocking)(struct kvm_vcpu *vcpu);
1782 
1783 	int (*pi_update_irte)(struct kvm *kvm, unsigned int host_irq,
1784 			      uint32_t guest_irq, bool set);
1785 	void (*pi_start_assignment)(struct kvm *kvm);
1786 	void (*apicv_pre_state_restore)(struct kvm_vcpu *vcpu);
1787 	void (*apicv_post_state_restore)(struct kvm_vcpu *vcpu);
1788 	bool (*dy_apicv_has_pending_interrupt)(struct kvm_vcpu *vcpu);
1789 
1790 	int (*set_hv_timer)(struct kvm_vcpu *vcpu, u64 guest_deadline_tsc,
1791 			    bool *expired);
1792 	void (*cancel_hv_timer)(struct kvm_vcpu *vcpu);
1793 
1794 	void (*setup_mce)(struct kvm_vcpu *vcpu);
1795 
1796 #ifdef CONFIG_KVM_SMM
1797 	int (*smi_allowed)(struct kvm_vcpu *vcpu, bool for_injection);
1798 	int (*enter_smm)(struct kvm_vcpu *vcpu, union kvm_smram *smram);
1799 	int (*leave_smm)(struct kvm_vcpu *vcpu, const union kvm_smram *smram);
1800 	void (*enable_smi_window)(struct kvm_vcpu *vcpu);
1801 #endif
1802 
1803 	int (*dev_get_attr)(u32 group, u64 attr, u64 *val);
1804 	int (*mem_enc_ioctl)(struct kvm *kvm, void __user *argp);
1805 	int (*mem_enc_register_region)(struct kvm *kvm, struct kvm_enc_region *argp);
1806 	int (*mem_enc_unregister_region)(struct kvm *kvm, struct kvm_enc_region *argp);
1807 	int (*vm_copy_enc_context_from)(struct kvm *kvm, unsigned int source_fd);
1808 	int (*vm_move_enc_context_from)(struct kvm *kvm, unsigned int source_fd);
1809 	void (*guest_memory_reclaimed)(struct kvm *kvm);
1810 
1811 	int (*get_feature_msr)(u32 msr, u64 *data);
1812 
1813 	int (*check_emulate_instruction)(struct kvm_vcpu *vcpu, int emul_type,
1814 					 void *insn, int insn_len);
1815 
1816 	bool (*apic_init_signal_blocked)(struct kvm_vcpu *vcpu);
1817 	int (*enable_l2_tlb_flush)(struct kvm_vcpu *vcpu);
1818 
1819 	void (*migrate_timers)(struct kvm_vcpu *vcpu);
1820 	void (*msr_filter_changed)(struct kvm_vcpu *vcpu);
1821 	int (*complete_emulated_msr)(struct kvm_vcpu *vcpu, int err);
1822 
1823 	void (*vcpu_deliver_sipi_vector)(struct kvm_vcpu *vcpu, u8 vector);
1824 
1825 	/*
1826 	 * Returns vCPU specific APICv inhibit reasons
1827 	 */
1828 	unsigned long (*vcpu_get_apicv_inhibit_reasons)(struct kvm_vcpu *vcpu);
1829 
1830 	gva_t (*get_untagged_addr)(struct kvm_vcpu *vcpu, gva_t gva, unsigned int flags);
1831 	void *(*alloc_apic_backing_page)(struct kvm_vcpu *vcpu);
1832 	int (*gmem_prepare)(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn, int max_order);
1833 	void (*gmem_invalidate)(kvm_pfn_t start, kvm_pfn_t end);
1834 	int (*private_max_mapping_level)(struct kvm *kvm, kvm_pfn_t pfn);
1835 };
1836 
1837 struct kvm_x86_nested_ops {
1838 	void (*leave_nested)(struct kvm_vcpu *vcpu);
1839 	bool (*is_exception_vmexit)(struct kvm_vcpu *vcpu, u8 vector,
1840 				    u32 error_code);
1841 	int (*check_events)(struct kvm_vcpu *vcpu);
1842 	bool (*has_events)(struct kvm_vcpu *vcpu, bool for_injection);
1843 	void (*triple_fault)(struct kvm_vcpu *vcpu);
1844 	int (*get_state)(struct kvm_vcpu *vcpu,
1845 			 struct kvm_nested_state __user *user_kvm_nested_state,
1846 			 unsigned user_data_size);
1847 	int (*set_state)(struct kvm_vcpu *vcpu,
1848 			 struct kvm_nested_state __user *user_kvm_nested_state,
1849 			 struct kvm_nested_state *kvm_state);
1850 	bool (*get_nested_state_pages)(struct kvm_vcpu *vcpu);
1851 	int (*write_log_dirty)(struct kvm_vcpu *vcpu, gpa_t l2_gpa);
1852 
1853 	int (*enable_evmcs)(struct kvm_vcpu *vcpu,
1854 			    uint16_t *vmcs_version);
1855 	uint16_t (*get_evmcs_version)(struct kvm_vcpu *vcpu);
1856 	void (*hv_inject_synthetic_vmexit_post_tlb_flush)(struct kvm_vcpu *vcpu);
1857 };
1858 
1859 struct kvm_x86_init_ops {
1860 	int (*hardware_setup)(void);
1861 	unsigned int (*handle_intel_pt_intr)(void);
1862 
1863 	struct kvm_x86_ops *runtime_ops;
1864 	struct kvm_pmu_ops *pmu_ops;
1865 };
1866 
1867 struct kvm_arch_async_pf {
1868 	u32 token;
1869 	gfn_t gfn;
1870 	unsigned long cr3;
1871 	bool direct_map;
1872 	u64 error_code;
1873 };
1874 
1875 extern u32 __read_mostly kvm_nr_uret_msrs;
1876 extern bool __read_mostly allow_smaller_maxphyaddr;
1877 extern bool __read_mostly enable_apicv;
1878 extern struct kvm_x86_ops kvm_x86_ops;
1879 
1880 #define kvm_x86_call(func) static_call(kvm_x86_##func)
1881 #define kvm_pmu_call(func) static_call(kvm_x86_pmu_##func)
1882 
1883 #define KVM_X86_OP(func) \
1884 	DECLARE_STATIC_CALL(kvm_x86_##func, *(((struct kvm_x86_ops *)0)->func));
1885 #define KVM_X86_OP_OPTIONAL KVM_X86_OP
1886 #define KVM_X86_OP_OPTIONAL_RET0 KVM_X86_OP
1887 #include <asm/kvm-x86-ops.h>
1888 
1889 int kvm_x86_vendor_init(struct kvm_x86_init_ops *ops);
1890 void kvm_x86_vendor_exit(void);
1891 
1892 #define __KVM_HAVE_ARCH_VM_ALLOC
1893 static inline struct kvm *kvm_arch_alloc_vm(void)
1894 {
1895 	return __vmalloc(kvm_x86_ops.vm_size, GFP_KERNEL_ACCOUNT | __GFP_ZERO);
1896 }
1897 
1898 #define __KVM_HAVE_ARCH_VM_FREE
1899 void kvm_arch_free_vm(struct kvm *kvm);
1900 
1901 #if IS_ENABLED(CONFIG_HYPERV)
1902 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS
1903 static inline int kvm_arch_flush_remote_tlbs(struct kvm *kvm)
1904 {
1905 	if (kvm_x86_ops.flush_remote_tlbs &&
1906 	    !kvm_x86_call(flush_remote_tlbs)(kvm))
1907 		return 0;
1908 	else
1909 		return -ENOTSUPP;
1910 }
1911 
1912 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE
1913 static inline int kvm_arch_flush_remote_tlbs_range(struct kvm *kvm, gfn_t gfn,
1914 						   u64 nr_pages)
1915 {
1916 	if (!kvm_x86_ops.flush_remote_tlbs_range)
1917 		return -EOPNOTSUPP;
1918 
1919 	return kvm_x86_call(flush_remote_tlbs_range)(kvm, gfn, nr_pages);
1920 }
1921 #endif /* CONFIG_HYPERV */
1922 
1923 enum kvm_intr_type {
1924 	/* Values are arbitrary, but must be non-zero. */
1925 	KVM_HANDLING_IRQ = 1,
1926 	KVM_HANDLING_NMI,
1927 };
1928 
1929 /* Enable perf NMI and timer modes to work, and minimise false positives. */
1930 #define kvm_arch_pmi_in_guest(vcpu) \
1931 	((vcpu) && (vcpu)->arch.handling_intr_from_guest && \
1932 	 (!!in_nmi() == ((vcpu)->arch.handling_intr_from_guest == KVM_HANDLING_NMI)))
1933 
1934 void __init kvm_mmu_x86_module_init(void);
1935 int kvm_mmu_vendor_module_init(void);
1936 void kvm_mmu_vendor_module_exit(void);
1937 
1938 void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
1939 int kvm_mmu_create(struct kvm_vcpu *vcpu);
1940 void kvm_mmu_init_vm(struct kvm *kvm);
1941 void kvm_mmu_uninit_vm(struct kvm *kvm);
1942 
1943 void kvm_mmu_init_memslot_memory_attributes(struct kvm *kvm,
1944 					    struct kvm_memory_slot *slot);
1945 
1946 void kvm_mmu_after_set_cpuid(struct kvm_vcpu *vcpu);
1947 void kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
1948 void kvm_mmu_slot_remove_write_access(struct kvm *kvm,
1949 				      const struct kvm_memory_slot *memslot,
1950 				      int start_level);
1951 void kvm_mmu_slot_try_split_huge_pages(struct kvm *kvm,
1952 				       const struct kvm_memory_slot *memslot,
1953 				       int target_level);
1954 void kvm_mmu_try_split_huge_pages(struct kvm *kvm,
1955 				  const struct kvm_memory_slot *memslot,
1956 				  u64 start, u64 end,
1957 				  int target_level);
1958 void kvm_mmu_zap_collapsible_sptes(struct kvm *kvm,
1959 				   const struct kvm_memory_slot *memslot);
1960 void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
1961 				   const struct kvm_memory_slot *memslot);
1962 void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, u64 gen);
1963 void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned long kvm_nr_mmu_pages);
1964 void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end);
1965 
1966 int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
1967 
1968 int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
1969 			  const void *val, int bytes);
1970 
1971 struct kvm_irq_mask_notifier {
1972 	void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
1973 	int irq;
1974 	struct hlist_node link;
1975 };
1976 
1977 void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
1978 				    struct kvm_irq_mask_notifier *kimn);
1979 void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
1980 				      struct kvm_irq_mask_notifier *kimn);
1981 void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
1982 			     bool mask);
1983 
1984 extern bool tdp_enabled;
1985 
1986 u64 vcpu_tsc_khz(struct kvm_vcpu *vcpu);
1987 
1988 /*
1989  * EMULTYPE_NO_DECODE - Set when re-emulating an instruction (after completing
1990  *			userspace I/O) to indicate that the emulation context
1991  *			should be reused as is, i.e. skip initialization of
1992  *			emulation context, instruction fetch and decode.
1993  *
1994  * EMULTYPE_TRAP_UD - Set when emulating an intercepted #UD from hardware.
1995  *		      Indicates that only select instructions (tagged with
1996  *		      EmulateOnUD) should be emulated (to minimize the emulator
1997  *		      attack surface).  See also EMULTYPE_TRAP_UD_FORCED.
1998  *
1999  * EMULTYPE_SKIP - Set when emulating solely to skip an instruction, i.e. to
2000  *		   decode the instruction length.  For use *only* by
2001  *		   kvm_x86_ops.skip_emulated_instruction() implementations if
2002  *		   EMULTYPE_COMPLETE_USER_EXIT is not set.
2003  *
2004  * EMULTYPE_ALLOW_RETRY_PF - Set when the emulator should resume the guest to
2005  *			     retry native execution under certain conditions,
2006  *			     Can only be set in conjunction with EMULTYPE_PF.
2007  *
2008  * EMULTYPE_TRAP_UD_FORCED - Set when emulating an intercepted #UD that was
2009  *			     triggered by KVM's magic "force emulation" prefix,
2010  *			     which is opt in via module param (off by default).
2011  *			     Bypasses EmulateOnUD restriction despite emulating
2012  *			     due to an intercepted #UD (see EMULTYPE_TRAP_UD).
2013  *			     Used to test the full emulator from userspace.
2014  *
2015  * EMULTYPE_VMWARE_GP - Set when emulating an intercepted #GP for VMware
2016  *			backdoor emulation, which is opt in via module param.
2017  *			VMware backdoor emulation handles select instructions
2018  *			and reinjects the #GP for all other cases.
2019  *
2020  * EMULTYPE_PF - Set when emulating MMIO by way of an intercepted #PF, in which
2021  *		 case the CR2/GPA value pass on the stack is valid.
2022  *
2023  * EMULTYPE_COMPLETE_USER_EXIT - Set when the emulator should update interruptibility
2024  *				 state and inject single-step #DBs after skipping
2025  *				 an instruction (after completing userspace I/O).
2026  *
2027  * EMULTYPE_WRITE_PF_TO_SP - Set when emulating an intercepted page fault that
2028  *			     is attempting to write a gfn that contains one or
2029  *			     more of the PTEs used to translate the write itself,
2030  *			     and the owning page table is being shadowed by KVM.
2031  *			     If emulation of the faulting instruction fails and
2032  *			     this flag is set, KVM will exit to userspace instead
2033  *			     of retrying emulation as KVM cannot make forward
2034  *			     progress.
2035  *
2036  *			     If emulation fails for a write to guest page tables,
2037  *			     KVM unprotects (zaps) the shadow page for the target
2038  *			     gfn and resumes the guest to retry the non-emulatable
2039  *			     instruction (on hardware).  Unprotecting the gfn
2040  *			     doesn't allow forward progress for a self-changing
2041  *			     access because doing so also zaps the translation for
2042  *			     the gfn, i.e. retrying the instruction will hit a
2043  *			     !PRESENT fault, which results in a new shadow page
2044  *			     and sends KVM back to square one.
2045  */
2046 #define EMULTYPE_NO_DECODE	    (1 << 0)
2047 #define EMULTYPE_TRAP_UD	    (1 << 1)
2048 #define EMULTYPE_SKIP		    (1 << 2)
2049 #define EMULTYPE_ALLOW_RETRY_PF	    (1 << 3)
2050 #define EMULTYPE_TRAP_UD_FORCED	    (1 << 4)
2051 #define EMULTYPE_VMWARE_GP	    (1 << 5)
2052 #define EMULTYPE_PF		    (1 << 6)
2053 #define EMULTYPE_COMPLETE_USER_EXIT (1 << 7)
2054 #define EMULTYPE_WRITE_PF_TO_SP	    (1 << 8)
2055 
2056 int kvm_emulate_instruction(struct kvm_vcpu *vcpu, int emulation_type);
2057 int kvm_emulate_instruction_from_buffer(struct kvm_vcpu *vcpu,
2058 					void *insn, int insn_len);
2059 void __kvm_prepare_emulation_failure_exit(struct kvm_vcpu *vcpu,
2060 					  u64 *data, u8 ndata);
2061 void kvm_prepare_emulation_failure_exit(struct kvm_vcpu *vcpu);
2062 
2063 void kvm_enable_efer_bits(u64);
2064 bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer);
2065 int kvm_get_msr_with_filter(struct kvm_vcpu *vcpu, u32 index, u64 *data);
2066 int kvm_set_msr_with_filter(struct kvm_vcpu *vcpu, u32 index, u64 data);
2067 int __kvm_get_msr(struct kvm_vcpu *vcpu, u32 index, u64 *data, bool host_initiated);
2068 int kvm_get_msr(struct kvm_vcpu *vcpu, u32 index, u64 *data);
2069 int kvm_set_msr(struct kvm_vcpu *vcpu, u32 index, u64 data);
2070 int kvm_emulate_rdmsr(struct kvm_vcpu *vcpu);
2071 int kvm_emulate_wrmsr(struct kvm_vcpu *vcpu);
2072 int kvm_emulate_as_nop(struct kvm_vcpu *vcpu);
2073 int kvm_emulate_invd(struct kvm_vcpu *vcpu);
2074 int kvm_emulate_mwait(struct kvm_vcpu *vcpu);
2075 int kvm_handle_invalid_op(struct kvm_vcpu *vcpu);
2076 int kvm_emulate_monitor(struct kvm_vcpu *vcpu);
2077 
2078 int kvm_fast_pio(struct kvm_vcpu *vcpu, int size, unsigned short port, int in);
2079 int kvm_emulate_cpuid(struct kvm_vcpu *vcpu);
2080 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
2081 int kvm_emulate_halt_noskip(struct kvm_vcpu *vcpu);
2082 int kvm_emulate_ap_reset_hold(struct kvm_vcpu *vcpu);
2083 int kvm_emulate_wbinvd(struct kvm_vcpu *vcpu);
2084 
2085 void kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
2086 void kvm_set_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
2087 int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, int seg);
2088 void kvm_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector);
2089 
2090 int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int idt_index,
2091 		    int reason, bool has_error_code, u32 error_code);
2092 
2093 void kvm_post_set_cr0(struct kvm_vcpu *vcpu, unsigned long old_cr0, unsigned long cr0);
2094 void kvm_post_set_cr4(struct kvm_vcpu *vcpu, unsigned long old_cr4, unsigned long cr4);
2095 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
2096 int kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
2097 int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
2098 int kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
2099 int kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val);
2100 unsigned long kvm_get_dr(struct kvm_vcpu *vcpu, int dr);
2101 unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
2102 void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw);
2103 int kvm_emulate_xsetbv(struct kvm_vcpu *vcpu);
2104 
2105 int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr);
2106 int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr);
2107 
2108 unsigned long kvm_get_rflags(struct kvm_vcpu *vcpu);
2109 void kvm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags);
2110 int kvm_emulate_rdpmc(struct kvm_vcpu *vcpu);
2111 
2112 void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr);
2113 void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
2114 void kvm_queue_exception_p(struct kvm_vcpu *vcpu, unsigned nr, unsigned long payload);
2115 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
2116 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
2117 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
2118 void kvm_inject_emulated_page_fault(struct kvm_vcpu *vcpu,
2119 				    struct x86_exception *fault);
2120 bool kvm_require_cpl(struct kvm_vcpu *vcpu, int required_cpl);
2121 bool kvm_require_dr(struct kvm_vcpu *vcpu, int dr);
2122 
2123 static inline int __kvm_irq_line_state(unsigned long *irq_state,
2124 				       int irq_source_id, int level)
2125 {
2126 	/* Logical OR for level trig interrupt */
2127 	if (level)
2128 		__set_bit(irq_source_id, irq_state);
2129 	else
2130 		__clear_bit(irq_source_id, irq_state);
2131 
2132 	return !!(*irq_state);
2133 }
2134 
2135 int kvm_pic_set_irq(struct kvm_pic *pic, int irq, int irq_source_id, int level);
2136 void kvm_pic_clear_all(struct kvm_pic *pic, int irq_source_id);
2137 
2138 void kvm_inject_nmi(struct kvm_vcpu *vcpu);
2139 int kvm_get_nr_pending_nmis(struct kvm_vcpu *vcpu);
2140 
2141 void kvm_update_dr7(struct kvm_vcpu *vcpu);
2142 
2143 bool __kvm_mmu_unprotect_gfn_and_retry(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa,
2144 				       bool always_retry);
2145 
2146 static inline bool kvm_mmu_unprotect_gfn_and_retry(struct kvm_vcpu *vcpu,
2147 						   gpa_t cr2_or_gpa)
2148 {
2149 	return __kvm_mmu_unprotect_gfn_and_retry(vcpu, cr2_or_gpa, false);
2150 }
2151 
2152 void kvm_mmu_free_roots(struct kvm *kvm, struct kvm_mmu *mmu,
2153 			ulong roots_to_free);
2154 void kvm_mmu_free_guest_mode_roots(struct kvm *kvm, struct kvm_mmu *mmu);
2155 gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
2156 			      struct x86_exception *exception);
2157 gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
2158 			       struct x86_exception *exception);
2159 gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
2160 				struct x86_exception *exception);
2161 
2162 bool kvm_apicv_activated(struct kvm *kvm);
2163 bool kvm_vcpu_apicv_activated(struct kvm_vcpu *vcpu);
2164 void __kvm_vcpu_update_apicv(struct kvm_vcpu *vcpu);
2165 void __kvm_set_or_clear_apicv_inhibit(struct kvm *kvm,
2166 				      enum kvm_apicv_inhibit reason, bool set);
2167 void kvm_set_or_clear_apicv_inhibit(struct kvm *kvm,
2168 				    enum kvm_apicv_inhibit reason, bool set);
2169 
2170 static inline void kvm_set_apicv_inhibit(struct kvm *kvm,
2171 					 enum kvm_apicv_inhibit reason)
2172 {
2173 	kvm_set_or_clear_apicv_inhibit(kvm, reason, true);
2174 }
2175 
2176 static inline void kvm_clear_apicv_inhibit(struct kvm *kvm,
2177 					   enum kvm_apicv_inhibit reason)
2178 {
2179 	kvm_set_or_clear_apicv_inhibit(kvm, reason, false);
2180 }
2181 
2182 unsigned long __kvm_emulate_hypercall(struct kvm_vcpu *vcpu, unsigned long nr,
2183 				      unsigned long a0, unsigned long a1,
2184 				      unsigned long a2, unsigned long a3,
2185 				      int op_64_bit, int cpl);
2186 int kvm_emulate_hypercall(struct kvm_vcpu *vcpu);
2187 
2188 int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code,
2189 		       void *insn, int insn_len);
2190 void kvm_mmu_print_sptes(struct kvm_vcpu *vcpu, gpa_t gpa, const char *msg);
2191 void kvm_mmu_invlpg(struct kvm_vcpu *vcpu, gva_t gva);
2192 void kvm_mmu_invalidate_addr(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
2193 			     u64 addr, unsigned long roots);
2194 void kvm_mmu_invpcid_gva(struct kvm_vcpu *vcpu, gva_t gva, unsigned long pcid);
2195 void kvm_mmu_new_pgd(struct kvm_vcpu *vcpu, gpa_t new_pgd);
2196 
2197 void kvm_configure_mmu(bool enable_tdp, int tdp_forced_root_level,
2198 		       int tdp_max_root_level, int tdp_huge_page_level);
2199 
2200 
2201 #ifdef CONFIG_KVM_PRIVATE_MEM
2202 #define kvm_arch_has_private_mem(kvm) ((kvm)->arch.has_private_mem)
2203 #else
2204 #define kvm_arch_has_private_mem(kvm) false
2205 #endif
2206 
2207 #define kvm_arch_has_readonly_mem(kvm) (!(kvm)->arch.has_protected_state)
2208 
2209 static inline u16 kvm_read_ldt(void)
2210 {
2211 	u16 ldt;
2212 	asm("sldt %0" : "=g"(ldt));
2213 	return ldt;
2214 }
2215 
2216 static inline void kvm_load_ldt(u16 sel)
2217 {
2218 	asm("lldt %0" : : "rm"(sel));
2219 }
2220 
2221 #ifdef CONFIG_X86_64
2222 static inline unsigned long read_msr(unsigned long msr)
2223 {
2224 	u64 value;
2225 
2226 	rdmsrl(msr, value);
2227 	return value;
2228 }
2229 #endif
2230 
2231 static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code)
2232 {
2233 	kvm_queue_exception_e(vcpu, GP_VECTOR, error_code);
2234 }
2235 
2236 #define TSS_IOPB_BASE_OFFSET 0x66
2237 #define TSS_BASE_SIZE 0x68
2238 #define TSS_IOPB_SIZE (65536 / 8)
2239 #define TSS_REDIRECTION_SIZE (256 / 8)
2240 #define RMODE_TSS_SIZE							\
2241 	(TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1)
2242 
2243 enum {
2244 	TASK_SWITCH_CALL = 0,
2245 	TASK_SWITCH_IRET = 1,
2246 	TASK_SWITCH_JMP = 2,
2247 	TASK_SWITCH_GATE = 3,
2248 };
2249 
2250 #define HF_GUEST_MASK		(1 << 0) /* VCPU is in guest-mode */
2251 
2252 #ifdef CONFIG_KVM_SMM
2253 #define HF_SMM_MASK		(1 << 1)
2254 #define HF_SMM_INSIDE_NMI_MASK	(1 << 2)
2255 
2256 # define KVM_MAX_NR_ADDRESS_SPACES	2
2257 /* SMM is currently unsupported for guests with private memory. */
2258 # define kvm_arch_nr_memslot_as_ids(kvm) (kvm_arch_has_private_mem(kvm) ? 1 : 2)
2259 # define kvm_arch_vcpu_memslots_id(vcpu) ((vcpu)->arch.hflags & HF_SMM_MASK ? 1 : 0)
2260 # define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, (role).smm)
2261 #else
2262 # define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, 0)
2263 #endif
2264 
2265 int kvm_cpu_has_injectable_intr(struct kvm_vcpu *v);
2266 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
2267 int kvm_cpu_has_extint(struct kvm_vcpu *v);
2268 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu);
2269 int kvm_cpu_get_extint(struct kvm_vcpu *v);
2270 int kvm_cpu_get_interrupt(struct kvm_vcpu *v);
2271 void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event);
2272 
2273 int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
2274 		    unsigned long ipi_bitmap_high, u32 min,
2275 		    unsigned long icr, int op_64_bit);
2276 
2277 int kvm_add_user_return_msr(u32 msr);
2278 int kvm_find_user_return_msr(u32 msr);
2279 int kvm_set_user_return_msr(unsigned index, u64 val, u64 mask);
2280 
2281 static inline bool kvm_is_supported_user_return_msr(u32 msr)
2282 {
2283 	return kvm_find_user_return_msr(msr) >= 0;
2284 }
2285 
2286 u64 kvm_scale_tsc(u64 tsc, u64 ratio);
2287 u64 kvm_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc);
2288 u64 kvm_calc_nested_tsc_offset(u64 l1_offset, u64 l2_offset, u64 l2_multiplier);
2289 u64 kvm_calc_nested_tsc_multiplier(u64 l1_multiplier, u64 l2_multiplier);
2290 
2291 unsigned long kvm_get_linear_rip(struct kvm_vcpu *vcpu);
2292 bool kvm_is_linear_rip(struct kvm_vcpu *vcpu, unsigned long linear_rip);
2293 
2294 void kvm_make_scan_ioapic_request(struct kvm *kvm);
2295 void kvm_make_scan_ioapic_request_mask(struct kvm *kvm,
2296 				       unsigned long *vcpu_bitmap);
2297 
2298 bool kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
2299 				     struct kvm_async_pf *work);
2300 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
2301 				 struct kvm_async_pf *work);
2302 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
2303 			       struct kvm_async_pf *work);
2304 void kvm_arch_async_page_present_queued(struct kvm_vcpu *vcpu);
2305 bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu *vcpu);
2306 extern bool kvm_find_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn);
2307 
2308 int kvm_skip_emulated_instruction(struct kvm_vcpu *vcpu);
2309 int kvm_complete_insn_gp(struct kvm_vcpu *vcpu, int err);
2310 
2311 void __user *__x86_set_memory_region(struct kvm *kvm, int id, gpa_t gpa,
2312 				     u32 size);
2313 bool kvm_vcpu_is_reset_bsp(struct kvm_vcpu *vcpu);
2314 bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu);
2315 
2316 bool kvm_intr_is_single_vcpu(struct kvm *kvm, struct kvm_lapic_irq *irq,
2317 			     struct kvm_vcpu **dest_vcpu);
2318 
2319 void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
2320 		     struct kvm_lapic_irq *irq);
2321 
2322 static inline bool kvm_irq_is_postable(struct kvm_lapic_irq *irq)
2323 {
2324 	/* We can only post Fixed and LowPrio IRQs */
2325 	return (irq->delivery_mode == APIC_DM_FIXED ||
2326 		irq->delivery_mode == APIC_DM_LOWEST);
2327 }
2328 
2329 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
2330 {
2331 	kvm_x86_call(vcpu_blocking)(vcpu);
2332 }
2333 
2334 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
2335 {
2336 	kvm_x86_call(vcpu_unblocking)(vcpu);
2337 }
2338 
2339 static inline int kvm_cpu_get_apicid(int mps_cpu)
2340 {
2341 #ifdef CONFIG_X86_LOCAL_APIC
2342 	return default_cpu_present_to_apicid(mps_cpu);
2343 #else
2344 	WARN_ON_ONCE(1);
2345 	return BAD_APICID;
2346 #endif
2347 }
2348 
2349 int memslot_rmap_alloc(struct kvm_memory_slot *slot, unsigned long npages);
2350 
2351 #define KVM_CLOCK_VALID_FLAGS						\
2352 	(KVM_CLOCK_TSC_STABLE | KVM_CLOCK_REALTIME | KVM_CLOCK_HOST_TSC)
2353 
2354 #define KVM_X86_VALID_QUIRKS			\
2355 	(KVM_X86_QUIRK_LINT0_REENABLED |	\
2356 	 KVM_X86_QUIRK_CD_NW_CLEARED |		\
2357 	 KVM_X86_QUIRK_LAPIC_MMIO_HOLE |	\
2358 	 KVM_X86_QUIRK_OUT_7E_INC_RIP |		\
2359 	 KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT |	\
2360 	 KVM_X86_QUIRK_FIX_HYPERCALL_INSN |	\
2361 	 KVM_X86_QUIRK_MWAIT_NEVER_UD_FAULTS |	\
2362 	 KVM_X86_QUIRK_SLOT_ZAP_ALL)
2363 
2364 /*
2365  * KVM previously used a u32 field in kvm_run to indicate the hypercall was
2366  * initiated from long mode. KVM now sets bit 0 to indicate long mode, but the
2367  * remaining 31 lower bits must be 0 to preserve ABI.
2368  */
2369 #define KVM_EXIT_HYPERCALL_MBZ		GENMASK_ULL(31, 1)
2370 
2371 #endif /* _ASM_X86_KVM_HOST_H */
2372