xref: /linux/tools/testing/selftests/kvm/include/x86/vmx.h (revision 7bb6284aa7b3c369b41e7f33fcbe193161f008e7)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2018, Google LLC.
4  */
5 
6 #ifndef SELFTEST_KVM_VMX_H
7 #define SELFTEST_KVM_VMX_H
8 
9 #include <asm/vmx.h>
10 
11 #include <stdint.h>
12 #include "processor.h"
13 #include "apic.h"
14 
15 /*
16  * Definitions of Primary Processor-Based VM-Execution Controls.
17  */
18 #define CPU_BASED_INTR_WINDOW_EXITING		0x00000004
19 #define CPU_BASED_USE_TSC_OFFSETTING		0x00000008
20 #define CPU_BASED_HLT_EXITING			0x00000080
21 #define CPU_BASED_INVLPG_EXITING		0x00000200
22 #define CPU_BASED_MWAIT_EXITING			0x00000400
23 #define CPU_BASED_RDPMC_EXITING			0x00000800
24 #define CPU_BASED_RDTSC_EXITING			0x00001000
25 #define CPU_BASED_CR3_LOAD_EXITING		0x00008000
26 #define CPU_BASED_CR3_STORE_EXITING		0x00010000
27 #define CPU_BASED_CR8_LOAD_EXITING		0x00080000
28 #define CPU_BASED_CR8_STORE_EXITING		0x00100000
29 #define CPU_BASED_TPR_SHADOW			0x00200000
30 #define CPU_BASED_NMI_WINDOW_EXITING		0x00400000
31 #define CPU_BASED_MOV_DR_EXITING		0x00800000
32 #define CPU_BASED_UNCOND_IO_EXITING		0x01000000
33 #define CPU_BASED_USE_IO_BITMAPS		0x02000000
34 #define CPU_BASED_MONITOR_TRAP			0x08000000
35 #define CPU_BASED_USE_MSR_BITMAPS		0x10000000
36 #define CPU_BASED_MONITOR_EXITING		0x20000000
37 #define CPU_BASED_PAUSE_EXITING			0x40000000
38 #define CPU_BASED_ACTIVATE_SECONDARY_CONTROLS	0x80000000
39 
40 #define CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR	0x0401e172
41 
42 /*
43  * Definitions of Secondary Processor-Based VM-Execution Controls.
44  */
45 #define SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES 0x00000001
46 #define SECONDARY_EXEC_ENABLE_EPT		0x00000002
47 #define SECONDARY_EXEC_DESC			0x00000004
48 #define SECONDARY_EXEC_ENABLE_RDTSCP		0x00000008
49 #define SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE	0x00000010
50 #define SECONDARY_EXEC_ENABLE_VPID		0x00000020
51 #define SECONDARY_EXEC_WBINVD_EXITING		0x00000040
52 #define SECONDARY_EXEC_UNRESTRICTED_GUEST	0x00000080
53 #define SECONDARY_EXEC_APIC_REGISTER_VIRT	0x00000100
54 #define SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY	0x00000200
55 #define SECONDARY_EXEC_PAUSE_LOOP_EXITING	0x00000400
56 #define SECONDARY_EXEC_RDRAND_EXITING		0x00000800
57 #define SECONDARY_EXEC_ENABLE_INVPCID		0x00001000
58 #define SECONDARY_EXEC_ENABLE_VMFUNC		0x00002000
59 #define SECONDARY_EXEC_SHADOW_VMCS		0x00004000
60 #define SECONDARY_EXEC_RDSEED_EXITING		0x00010000
61 #define SECONDARY_EXEC_ENABLE_PML		0x00020000
62 #define SECONDARY_EPT_VE			0x00040000
63 #define SECONDARY_ENABLE_XSAV_RESTORE		0x00100000
64 #define SECONDARY_EXEC_TSC_SCALING		0x02000000
65 
66 #define PIN_BASED_EXT_INTR_MASK			0x00000001
67 #define PIN_BASED_NMI_EXITING			0x00000008
68 #define PIN_BASED_VIRTUAL_NMIS			0x00000020
69 #define PIN_BASED_VMX_PREEMPTION_TIMER		0x00000040
70 #define PIN_BASED_POSTED_INTR			0x00000080
71 
72 #define PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR	0x00000016
73 
74 #define VM_EXIT_SAVE_DEBUG_CONTROLS		0x00000004
75 #define VM_EXIT_HOST_ADDR_SPACE_SIZE		0x00000200
76 #define VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL	0x00001000
77 #define VM_EXIT_ACK_INTR_ON_EXIT		0x00008000
78 #define VM_EXIT_SAVE_IA32_PAT			0x00040000
79 #define VM_EXIT_LOAD_IA32_PAT			0x00080000
80 #define VM_EXIT_SAVE_IA32_EFER			0x00100000
81 #define VM_EXIT_LOAD_IA32_EFER			0x00200000
82 #define VM_EXIT_SAVE_VMX_PREEMPTION_TIMER	0x00400000
83 
84 #define VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR	0x00036dff
85 
86 #define VM_ENTRY_LOAD_DEBUG_CONTROLS		0x00000004
87 #define VM_ENTRY_IA32E_MODE			0x00000200
88 #define VM_ENTRY_SMM				0x00000400
89 #define VM_ENTRY_DEACT_DUAL_MONITOR		0x00000800
90 #define VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL	0x00002000
91 #define VM_ENTRY_LOAD_IA32_PAT			0x00004000
92 #define VM_ENTRY_LOAD_IA32_EFER			0x00008000
93 
94 #define VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR	0x000011ff
95 
96 #define VMX_MISC_PREEMPTION_TIMER_RATE_MASK	0x0000001f
97 #define VMX_MISC_SAVE_EFER_LMA			0x00000020
98 
99 #define VMX_EPT_VPID_CAP_1G_PAGES		0x00020000
100 #define VMX_EPT_VPID_CAP_AD_BITS		0x00200000
101 
102 #define EXIT_REASON_FAILED_VMENTRY	0x80000000
103 
104 enum vmcs_field {
105 	VIRTUAL_PROCESSOR_ID		= 0x00000000,
106 	POSTED_INTR_NV			= 0x00000002,
107 	GUEST_ES_SELECTOR		= 0x00000800,
108 	GUEST_CS_SELECTOR		= 0x00000802,
109 	GUEST_SS_SELECTOR		= 0x00000804,
110 	GUEST_DS_SELECTOR		= 0x00000806,
111 	GUEST_FS_SELECTOR		= 0x00000808,
112 	GUEST_GS_SELECTOR		= 0x0000080a,
113 	GUEST_LDTR_SELECTOR		= 0x0000080c,
114 	GUEST_TR_SELECTOR		= 0x0000080e,
115 	GUEST_INTR_STATUS		= 0x00000810,
116 	GUEST_PML_INDEX			= 0x00000812,
117 	HOST_ES_SELECTOR		= 0x00000c00,
118 	HOST_CS_SELECTOR		= 0x00000c02,
119 	HOST_SS_SELECTOR		= 0x00000c04,
120 	HOST_DS_SELECTOR		= 0x00000c06,
121 	HOST_FS_SELECTOR		= 0x00000c08,
122 	HOST_GS_SELECTOR		= 0x00000c0a,
123 	HOST_TR_SELECTOR		= 0x00000c0c,
124 	IO_BITMAP_A			= 0x00002000,
125 	IO_BITMAP_A_HIGH		= 0x00002001,
126 	IO_BITMAP_B			= 0x00002002,
127 	IO_BITMAP_B_HIGH		= 0x00002003,
128 	MSR_BITMAP			= 0x00002004,
129 	MSR_BITMAP_HIGH			= 0x00002005,
130 	VM_EXIT_MSR_STORE_ADDR		= 0x00002006,
131 	VM_EXIT_MSR_STORE_ADDR_HIGH	= 0x00002007,
132 	VM_EXIT_MSR_LOAD_ADDR		= 0x00002008,
133 	VM_EXIT_MSR_LOAD_ADDR_HIGH	= 0x00002009,
134 	VM_ENTRY_MSR_LOAD_ADDR		= 0x0000200a,
135 	VM_ENTRY_MSR_LOAD_ADDR_HIGH	= 0x0000200b,
136 	PML_ADDRESS			= 0x0000200e,
137 	PML_ADDRESS_HIGH		= 0x0000200f,
138 	TSC_OFFSET			= 0x00002010,
139 	TSC_OFFSET_HIGH			= 0x00002011,
140 	VIRTUAL_APIC_PAGE_ADDR		= 0x00002012,
141 	VIRTUAL_APIC_PAGE_ADDR_HIGH	= 0x00002013,
142 	APIC_ACCESS_ADDR		= 0x00002014,
143 	APIC_ACCESS_ADDR_HIGH		= 0x00002015,
144 	POSTED_INTR_DESC_ADDR		= 0x00002016,
145 	POSTED_INTR_DESC_ADDR_HIGH	= 0x00002017,
146 	EPT_POINTER			= 0x0000201a,
147 	EPT_POINTER_HIGH		= 0x0000201b,
148 	EOI_EXIT_BITMAP0		= 0x0000201c,
149 	EOI_EXIT_BITMAP0_HIGH		= 0x0000201d,
150 	EOI_EXIT_BITMAP1		= 0x0000201e,
151 	EOI_EXIT_BITMAP1_HIGH		= 0x0000201f,
152 	EOI_EXIT_BITMAP2		= 0x00002020,
153 	EOI_EXIT_BITMAP2_HIGH		= 0x00002021,
154 	EOI_EXIT_BITMAP3		= 0x00002022,
155 	EOI_EXIT_BITMAP3_HIGH		= 0x00002023,
156 	VMREAD_BITMAP			= 0x00002026,
157 	VMREAD_BITMAP_HIGH		= 0x00002027,
158 	VMWRITE_BITMAP			= 0x00002028,
159 	VMWRITE_BITMAP_HIGH		= 0x00002029,
160 	XSS_EXIT_BITMAP			= 0x0000202C,
161 	XSS_EXIT_BITMAP_HIGH		= 0x0000202D,
162 	ENCLS_EXITING_BITMAP		= 0x0000202E,
163 	ENCLS_EXITING_BITMAP_HIGH	= 0x0000202F,
164 	TSC_MULTIPLIER			= 0x00002032,
165 	TSC_MULTIPLIER_HIGH		= 0x00002033,
166 	GUEST_PHYSICAL_ADDRESS		= 0x00002400,
167 	GUEST_PHYSICAL_ADDRESS_HIGH	= 0x00002401,
168 	VMCS_LINK_POINTER		= 0x00002800,
169 	VMCS_LINK_POINTER_HIGH		= 0x00002801,
170 	GUEST_IA32_DEBUGCTL		= 0x00002802,
171 	GUEST_IA32_DEBUGCTL_HIGH	= 0x00002803,
172 	GUEST_IA32_PAT			= 0x00002804,
173 	GUEST_IA32_PAT_HIGH		= 0x00002805,
174 	GUEST_IA32_EFER			= 0x00002806,
175 	GUEST_IA32_EFER_HIGH		= 0x00002807,
176 	GUEST_IA32_PERF_GLOBAL_CTRL	= 0x00002808,
177 	GUEST_IA32_PERF_GLOBAL_CTRL_HIGH= 0x00002809,
178 	GUEST_PDPTR0			= 0x0000280a,
179 	GUEST_PDPTR0_HIGH		= 0x0000280b,
180 	GUEST_PDPTR1			= 0x0000280c,
181 	GUEST_PDPTR1_HIGH		= 0x0000280d,
182 	GUEST_PDPTR2			= 0x0000280e,
183 	GUEST_PDPTR2_HIGH		= 0x0000280f,
184 	GUEST_PDPTR3			= 0x00002810,
185 	GUEST_PDPTR3_HIGH		= 0x00002811,
186 	GUEST_BNDCFGS			= 0x00002812,
187 	GUEST_BNDCFGS_HIGH		= 0x00002813,
188 	HOST_IA32_PAT			= 0x00002c00,
189 	HOST_IA32_PAT_HIGH		= 0x00002c01,
190 	HOST_IA32_EFER			= 0x00002c02,
191 	HOST_IA32_EFER_HIGH		= 0x00002c03,
192 	HOST_IA32_PERF_GLOBAL_CTRL	= 0x00002c04,
193 	HOST_IA32_PERF_GLOBAL_CTRL_HIGH	= 0x00002c05,
194 	PIN_BASED_VM_EXEC_CONTROL	= 0x00004000,
195 	CPU_BASED_VM_EXEC_CONTROL	= 0x00004002,
196 	EXCEPTION_BITMAP		= 0x00004004,
197 	PAGE_FAULT_ERROR_CODE_MASK	= 0x00004006,
198 	PAGE_FAULT_ERROR_CODE_MATCH	= 0x00004008,
199 	CR3_TARGET_COUNT		= 0x0000400a,
200 	VM_EXIT_CONTROLS		= 0x0000400c,
201 	VM_EXIT_MSR_STORE_COUNT		= 0x0000400e,
202 	VM_EXIT_MSR_LOAD_COUNT		= 0x00004010,
203 	VM_ENTRY_CONTROLS		= 0x00004012,
204 	VM_ENTRY_MSR_LOAD_COUNT		= 0x00004014,
205 	VM_ENTRY_INTR_INFO_FIELD	= 0x00004016,
206 	VM_ENTRY_EXCEPTION_ERROR_CODE	= 0x00004018,
207 	VM_ENTRY_INSTRUCTION_LEN	= 0x0000401a,
208 	TPR_THRESHOLD			= 0x0000401c,
209 	SECONDARY_VM_EXEC_CONTROL	= 0x0000401e,
210 	PLE_GAP				= 0x00004020,
211 	PLE_WINDOW			= 0x00004022,
212 	VM_INSTRUCTION_ERROR		= 0x00004400,
213 	VM_EXIT_REASON			= 0x00004402,
214 	VM_EXIT_INTR_INFO		= 0x00004404,
215 	VM_EXIT_INTR_ERROR_CODE		= 0x00004406,
216 	IDT_VECTORING_INFO_FIELD	= 0x00004408,
217 	IDT_VECTORING_ERROR_CODE	= 0x0000440a,
218 	VM_EXIT_INSTRUCTION_LEN		= 0x0000440c,
219 	VMX_INSTRUCTION_INFO		= 0x0000440e,
220 	GUEST_ES_LIMIT			= 0x00004800,
221 	GUEST_CS_LIMIT			= 0x00004802,
222 	GUEST_SS_LIMIT			= 0x00004804,
223 	GUEST_DS_LIMIT			= 0x00004806,
224 	GUEST_FS_LIMIT			= 0x00004808,
225 	GUEST_GS_LIMIT			= 0x0000480a,
226 	GUEST_LDTR_LIMIT		= 0x0000480c,
227 	GUEST_TR_LIMIT			= 0x0000480e,
228 	GUEST_GDTR_LIMIT		= 0x00004810,
229 	GUEST_IDTR_LIMIT		= 0x00004812,
230 	GUEST_ES_AR_BYTES		= 0x00004814,
231 	GUEST_CS_AR_BYTES		= 0x00004816,
232 	GUEST_SS_AR_BYTES		= 0x00004818,
233 	GUEST_DS_AR_BYTES		= 0x0000481a,
234 	GUEST_FS_AR_BYTES		= 0x0000481c,
235 	GUEST_GS_AR_BYTES		= 0x0000481e,
236 	GUEST_LDTR_AR_BYTES		= 0x00004820,
237 	GUEST_TR_AR_BYTES		= 0x00004822,
238 	GUEST_INTERRUPTIBILITY_INFO	= 0x00004824,
239 	GUEST_ACTIVITY_STATE		= 0X00004826,
240 	GUEST_SYSENTER_CS		= 0x0000482A,
241 	VMX_PREEMPTION_TIMER_VALUE	= 0x0000482E,
242 	HOST_IA32_SYSENTER_CS		= 0x00004c00,
243 	CR0_GUEST_HOST_MASK		= 0x00006000,
244 	CR4_GUEST_HOST_MASK		= 0x00006002,
245 	CR0_READ_SHADOW			= 0x00006004,
246 	CR4_READ_SHADOW			= 0x00006006,
247 	CR3_TARGET_VALUE0		= 0x00006008,
248 	CR3_TARGET_VALUE1		= 0x0000600a,
249 	CR3_TARGET_VALUE2		= 0x0000600c,
250 	CR3_TARGET_VALUE3		= 0x0000600e,
251 	EXIT_QUALIFICATION		= 0x00006400,
252 	GUEST_LINEAR_ADDRESS		= 0x0000640a,
253 	GUEST_CR0			= 0x00006800,
254 	GUEST_CR3			= 0x00006802,
255 	GUEST_CR4			= 0x00006804,
256 	GUEST_ES_BASE			= 0x00006806,
257 	GUEST_CS_BASE			= 0x00006808,
258 	GUEST_SS_BASE			= 0x0000680a,
259 	GUEST_DS_BASE			= 0x0000680c,
260 	GUEST_FS_BASE			= 0x0000680e,
261 	GUEST_GS_BASE			= 0x00006810,
262 	GUEST_LDTR_BASE			= 0x00006812,
263 	GUEST_TR_BASE			= 0x00006814,
264 	GUEST_GDTR_BASE			= 0x00006816,
265 	GUEST_IDTR_BASE			= 0x00006818,
266 	GUEST_DR7			= 0x0000681a,
267 	GUEST_RSP			= 0x0000681c,
268 	GUEST_RIP			= 0x0000681e,
269 	GUEST_RFLAGS			= 0x00006820,
270 	GUEST_PENDING_DBG_EXCEPTIONS	= 0x00006822,
271 	GUEST_SYSENTER_ESP		= 0x00006824,
272 	GUEST_SYSENTER_EIP		= 0x00006826,
273 	HOST_CR0			= 0x00006c00,
274 	HOST_CR3			= 0x00006c02,
275 	HOST_CR4			= 0x00006c04,
276 	HOST_FS_BASE			= 0x00006c06,
277 	HOST_GS_BASE			= 0x00006c08,
278 	HOST_TR_BASE			= 0x00006c0a,
279 	HOST_GDTR_BASE			= 0x00006c0c,
280 	HOST_IDTR_BASE			= 0x00006c0e,
281 	HOST_IA32_SYSENTER_ESP		= 0x00006c10,
282 	HOST_IA32_SYSENTER_EIP		= 0x00006c12,
283 	HOST_RSP			= 0x00006c14,
284 	HOST_RIP			= 0x00006c16,
285 };
286 
287 struct vmx_msr_entry {
288 	u32 index;
289 	u32 reserved;
290 	u64 value;
291 } __attribute__ ((aligned(16)));
292 
293 #define VMX_SWITCH_GPRS_ASM \
294 	GUEST_SWITCH_GPR_ASM(rax) \
295 	GUEST_SWITCH_GPR_ASM(rbx) \
296 	GUEST_SWITCH_GPR_ASM(rcx) \
297 	GUEST_SWITCH_GPR_ASM(rdx) \
298 	GUEST_SWITCH_GPR_ASM(rbp) \
299 	GUEST_SWITCH_GPR_ASM(rsi) \
300 	GUEST_SWITCH_GPR_ASM(rdi) \
301 	GUEST_SWITCH_GPR_ASM(r8)  \
302 	GUEST_SWITCH_GPR_ASM(r9)  \
303 	GUEST_SWITCH_GPR_ASM(r10) \
304 	GUEST_SWITCH_GPR_ASM(r11) \
305 	GUEST_SWITCH_GPR_ASM(r12) \
306 	GUEST_SWITCH_GPR_ASM(r13) \
307 	GUEST_SWITCH_GPR_ASM(r14) \
308 	GUEST_SWITCH_GPR_ASM(r15)
309 
310 #include "evmcs.h"
311 
312 static inline int vmxon(u64 phys)
313 {
314 	u8 ret;
315 
316 	__asm__ __volatile__ ("vmxon %[pa]; setna %[ret]"
317 		: [ret]"=rm"(ret)
318 		: [pa]"m"(phys)
319 		: "cc", "memory");
320 
321 	return ret;
322 }
323 
324 static inline void vmxoff(void)
325 {
326 	__asm__ __volatile__("vmxoff");
327 }
328 
329 static inline int vmclear(u64 vmcs_pa)
330 {
331 	u8 ret;
332 
333 	__asm__ __volatile__ ("vmclear %[pa]; setna %[ret]"
334 		: [ret]"=rm"(ret)
335 		: [pa]"m"(vmcs_pa)
336 		: "cc", "memory");
337 
338 	return ret;
339 }
340 
341 static inline int vmptrld(u64 vmcs_pa)
342 {
343 	u8 ret;
344 
345 	if (enable_evmcs)
346 		return -1;
347 
348 	__asm__ __volatile__ ("vmptrld %[pa]; setna %[ret]"
349 		: [ret]"=rm"(ret)
350 		: [pa]"m"(vmcs_pa)
351 		: "cc", "memory");
352 
353 	return ret;
354 }
355 
356 static inline int vmptrst(u64 *value)
357 {
358 	u64 tmp;
359 	u8 ret;
360 
361 	if (enable_evmcs)
362 		return evmcs_vmptrst(value);
363 
364 	__asm__ __volatile__("vmptrst %[value]; setna %[ret]"
365 		: [value]"=m"(tmp), [ret]"=rm"(ret)
366 		: : "cc", "memory");
367 
368 	*value = tmp;
369 	return ret;
370 }
371 
372 /*
373  * A wrapper around vmptrst that ignores errors and returns zero if the
374  * vmptrst instruction fails.
375  */
376 static inline u64 vmptrstz(void)
377 {
378 	u64 value = 0;
379 	vmptrst(&value);
380 	return value;
381 }
382 
383 static inline int vmlaunch(void)
384 {
385 	int ret;
386 
387 	if (enable_evmcs)
388 		return evmcs_vmlaunch();
389 
390 	__asm__ __volatile__("push $0;"
391 			     "vmwrite %%rsp, %[host_rsp];"
392 			     "lea 1f(%%rip), %%rax;"
393 			     "vmwrite %%rax, %[host_rip];"
394 			     VMX_SWITCH_GPRS_ASM
395 			     "vmlaunch;"
396 			     "incq (%%rsp);"
397 			     "1: ;"
398 			     VMX_SWITCH_GPRS_ASM
399 			     "pop %%rax;"
400 			     : [ret]"=&a"(ret)
401 			     : [host_rsp]"r"((u64)HOST_RSP),
402 			       [host_rip]"r"((u64)HOST_RIP),
403 			       GUEST_REGS_OFFSETS
404 			     : "memory", "cc");
405 	return ret;
406 }
407 
408 static inline int vmresume(void)
409 {
410 	int ret;
411 
412 	if (enable_evmcs)
413 		return evmcs_vmresume();
414 
415 	__asm__ __volatile__("push $0;"
416 			     "vmwrite %%rsp, %[host_rsp];"
417 			     "lea 1f(%%rip), %%rax;"
418 			     "vmwrite %%rax, %[host_rip];"
419 			     VMX_SWITCH_GPRS_ASM
420 			     "vmresume;"
421 			     "incq (%%rsp);"
422 			     "1: ;"
423 			     VMX_SWITCH_GPRS_ASM
424 			     "pop %%rax;"
425 			     : [ret]"=&a"(ret)
426 			     : [host_rsp]"r"((u64)HOST_RSP),
427 			       [host_rip]"r"((u64)HOST_RIP),
428 			       GUEST_REGS_OFFSETS
429 			     : "memory", "cc");
430 	return ret;
431 }
432 
433 static inline void vmcall(void)
434 {
435 	/*
436 	 * Stuff RAX and RCX with "safe" values to make sure L0 doesn't handle
437 	 * it as a valid hypercall (e.g. Hyper-V L2 TLB flush) as the intended
438 	 * use of this function is to exit to L1 from L2.  Clobber all other
439 	 * GPRs as L1 doesn't correctly preserve them during vmexits.
440 	 */
441 	__asm__ __volatile__("push %%rbp; vmcall; pop %%rbp"
442 			     : : "a"(0xdeadbeef), "c"(0xbeefdead)
443 			     : "rbx", "rdx", "rsi", "rdi", "r8", "r9",
444 			       "r10", "r11", "r12", "r13", "r14", "r15");
445 }
446 
447 static inline int vmread(u64 encoding, u64 *value)
448 {
449 	u64 tmp;
450 	u8 ret;
451 
452 	if (enable_evmcs)
453 		return evmcs_vmread(encoding, value);
454 
455 	__asm__ __volatile__("vmread %[encoding], %[value]; setna %[ret]"
456 		: [value]"=rm"(tmp), [ret]"=rm"(ret)
457 		: [encoding]"r"(encoding)
458 		: "cc", "memory");
459 
460 	*value = tmp;
461 	return ret;
462 }
463 
464 /*
465  * A wrapper around vmread that ignores errors and returns zero if the
466  * vmread instruction fails.
467  */
468 static inline u64 vmreadz(u64 encoding)
469 {
470 	u64 value = 0;
471 	vmread(encoding, &value);
472 	return value;
473 }
474 
475 static inline int vmwrite(u64 encoding, u64 value)
476 {
477 	u8 ret;
478 
479 	if (enable_evmcs)
480 		return evmcs_vmwrite(encoding, value);
481 
482 	__asm__ __volatile__ ("vmwrite %[value], %[encoding]; setna %[ret]"
483 		: [ret]"=rm"(ret)
484 		: [value]"rm"(value), [encoding]"r"(encoding)
485 		: "cc", "memory");
486 
487 	return ret;
488 }
489 
490 static inline u32 vmcs_revision(void)
491 {
492 	return rdmsr(MSR_IA32_VMX_BASIC);
493 }
494 
495 struct vmx_pages {
496 	void *vmxon_hva;
497 	u64 vmxon_gpa;
498 	void *vmxon;
499 
500 	void *vmcs_hva;
501 	u64 vmcs_gpa;
502 	void *vmcs;
503 
504 	void *msr_hva;
505 	u64 msr_gpa;
506 	void *msr;
507 
508 	void *shadow_vmcs_hva;
509 	u64 shadow_vmcs_gpa;
510 	void *shadow_vmcs;
511 
512 	void *vmread_hva;
513 	u64 vmread_gpa;
514 	void *vmread;
515 
516 	void *vmwrite_hva;
517 	u64 vmwrite_gpa;
518 	void *vmwrite;
519 
520 	void *apic_access_hva;
521 	u64 apic_access_gpa;
522 	void *apic_access;
523 
524 	void *stack;
525 
526 	u64 eptp_gpa;
527 };
528 
529 union vmx_basic {
530 	u64 val;
531 	struct {
532 		u32 revision;
533 		u32	size:13,
534 			reserved1:3,
535 			width:1,
536 			dual:1,
537 			type:4,
538 			insouts:1,
539 			ctrl:1,
540 			vm_entry_exception_ctrl:1,
541 			reserved2:7;
542 	};
543 };
544 
545 union vmx_ctrl_msr {
546 	u64 val;
547 	struct {
548 		u32 set, clr;
549 	};
550 };
551 
552 struct vmx_pages *vcpu_alloc_vmx(struct kvm_vm *vm, gva_t *p_vmx_gva);
553 bool prepare_for_vmx_operation(struct vmx_pages *vmx);
554 void prepare_vmcs(struct vmx_pages *vmx, void *guest_rip);
555 bool load_vmcs(struct vmx_pages *vmx);
556 
557 bool ept_1g_pages_supported(void);
558 
559 bool kvm_cpu_has_ept(void);
560 void vm_enable_ept(struct kvm_vm *vm);
561 void prepare_virtualize_apic_accesses(struct vmx_pages *vmx, struct kvm_vm *vm);
562 
563 #endif /* SELFTEST_KVM_VMX_H */
564