1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __SVM_H
3 #define __SVM_H
4
5 #include <uapi/asm/svm.h>
6 #include <uapi/asm/kvm.h>
7
8 /*
9 * 32-bit intercept words in the VMCB Control Area, starting
10 * at Byte offset 000h.
11 */
12
13 enum intercept_words {
14 INTERCEPT_CR = 0,
15 INTERCEPT_DR,
16 INTERCEPT_EXCEPTION,
17 INTERCEPT_WORD3,
18 INTERCEPT_WORD4,
19 INTERCEPT_WORD5,
20 MAX_INTERCEPT,
21 };
22
23 enum {
24 /* Byte offset 000h (word 0) */
25 INTERCEPT_CR0_READ = 0,
26 INTERCEPT_CR3_READ = 3,
27 INTERCEPT_CR4_READ = 4,
28 INTERCEPT_CR8_READ = 8,
29 INTERCEPT_CR0_WRITE = 16,
30 INTERCEPT_CR3_WRITE = 16 + 3,
31 INTERCEPT_CR4_WRITE = 16 + 4,
32 INTERCEPT_CR8_WRITE = 16 + 8,
33 /* Byte offset 004h (word 1) */
34 INTERCEPT_DR0_READ = 32,
35 INTERCEPT_DR1_READ,
36 INTERCEPT_DR2_READ,
37 INTERCEPT_DR3_READ,
38 INTERCEPT_DR4_READ,
39 INTERCEPT_DR5_READ,
40 INTERCEPT_DR6_READ,
41 INTERCEPT_DR7_READ,
42 INTERCEPT_DR0_WRITE = 48,
43 INTERCEPT_DR1_WRITE,
44 INTERCEPT_DR2_WRITE,
45 INTERCEPT_DR3_WRITE,
46 INTERCEPT_DR4_WRITE,
47 INTERCEPT_DR5_WRITE,
48 INTERCEPT_DR6_WRITE,
49 INTERCEPT_DR7_WRITE,
50 /* Byte offset 008h (word 2) */
51 INTERCEPT_EXCEPTION_OFFSET = 64,
52 /* Byte offset 00Ch (word 3) */
53 INTERCEPT_INTR = 96,
54 INTERCEPT_NMI,
55 INTERCEPT_SMI,
56 INTERCEPT_INIT,
57 INTERCEPT_VINTR,
58 INTERCEPT_SELECTIVE_CR0,
59 INTERCEPT_STORE_IDTR,
60 INTERCEPT_STORE_GDTR,
61 INTERCEPT_STORE_LDTR,
62 INTERCEPT_STORE_TR,
63 INTERCEPT_LOAD_IDTR,
64 INTERCEPT_LOAD_GDTR,
65 INTERCEPT_LOAD_LDTR,
66 INTERCEPT_LOAD_TR,
67 INTERCEPT_RDTSC,
68 INTERCEPT_RDPMC,
69 INTERCEPT_PUSHF,
70 INTERCEPT_POPF,
71 INTERCEPT_CPUID,
72 INTERCEPT_RSM,
73 INTERCEPT_IRET,
74 INTERCEPT_INTn,
75 INTERCEPT_INVD,
76 INTERCEPT_PAUSE,
77 INTERCEPT_HLT,
78 INTERCEPT_INVLPG,
79 INTERCEPT_INVLPGA,
80 INTERCEPT_IOIO_PROT,
81 INTERCEPT_MSR_PROT,
82 INTERCEPT_TASK_SWITCH,
83 INTERCEPT_FERR_FREEZE,
84 INTERCEPT_SHUTDOWN,
85 /* Byte offset 010h (word 4) */
86 INTERCEPT_VMRUN = 128,
87 INTERCEPT_VMMCALL,
88 INTERCEPT_VMLOAD,
89 INTERCEPT_VMSAVE,
90 INTERCEPT_STGI,
91 INTERCEPT_CLGI,
92 INTERCEPT_SKINIT,
93 INTERCEPT_RDTSCP,
94 INTERCEPT_ICEBP,
95 INTERCEPT_WBINVD,
96 INTERCEPT_MONITOR,
97 INTERCEPT_MWAIT,
98 INTERCEPT_MWAIT_COND,
99 INTERCEPT_XSETBV,
100 INTERCEPT_RDPRU,
101 TRAP_EFER_WRITE,
102 TRAP_CR0_WRITE,
103 TRAP_CR1_WRITE,
104 TRAP_CR2_WRITE,
105 TRAP_CR3_WRITE,
106 TRAP_CR4_WRITE,
107 TRAP_CR5_WRITE,
108 TRAP_CR6_WRITE,
109 TRAP_CR7_WRITE,
110 TRAP_CR8_WRITE,
111 /* Byte offset 014h (word 5) */
112 INTERCEPT_INVLPGB = 160,
113 INTERCEPT_INVLPGB_ILLEGAL,
114 INTERCEPT_INVPCID,
115 INTERCEPT_MCOMMIT,
116 INTERCEPT_TLBSYNC,
117 };
118
119
120 struct __attribute__ ((__packed__)) vmcb_control_area {
121 u32 intercepts[MAX_INTERCEPT];
122 u32 reserved_1[15 - MAX_INTERCEPT];
123 u16 pause_filter_thresh;
124 u16 pause_filter_count;
125 u64 iopm_base_pa;
126 u64 msrpm_base_pa;
127 u64 tsc_offset;
128 u32 asid;
129 u8 tlb_ctl;
130 u8 reserved_2[3];
131 u32 int_ctl;
132 u32 int_vector;
133 u32 int_state;
134 u8 reserved_3[4];
135 u32 exit_code;
136 u32 exit_code_hi;
137 u64 exit_info_1;
138 u64 exit_info_2;
139 u32 exit_int_info;
140 u32 exit_int_info_err;
141 u64 nested_ctl;
142 u64 avic_vapic_bar;
143 u64 ghcb_gpa;
144 u32 event_inj;
145 u32 event_inj_err;
146 u64 nested_cr3;
147 u64 virt_ext;
148 u32 clean;
149 u32 reserved_5;
150 u64 next_rip;
151 u8 insn_len;
152 u8 insn_bytes[15];
153 u64 avic_backing_page; /* Offset 0xe0 */
154 u8 reserved_6[8]; /* Offset 0xe8 */
155 u64 avic_logical_id; /* Offset 0xf0 */
156 u64 avic_physical_id; /* Offset 0xf8 */
157 u8 reserved_7[8];
158 u64 vmsa_pa; /* Used for an SEV-ES guest */
159 u8 reserved_8[720];
160 /*
161 * Offset 0x3e0, 32 bytes reserved
162 * for use by hypervisor/software.
163 */
164 u8 reserved_sw[32];
165 };
166
167
168 #define TLB_CONTROL_DO_NOTHING 0
169 #define TLB_CONTROL_FLUSH_ALL_ASID 1
170 #define TLB_CONTROL_FLUSH_ASID 3
171 #define TLB_CONTROL_FLUSH_ASID_LOCAL 7
172
173 #define V_TPR_MASK 0x0f
174
175 #define V_IRQ_SHIFT 8
176 #define V_IRQ_MASK (1 << V_IRQ_SHIFT)
177
178 #define V_GIF_SHIFT 9
179 #define V_GIF_MASK (1 << V_GIF_SHIFT)
180
181 #define V_INTR_PRIO_SHIFT 16
182 #define V_INTR_PRIO_MASK (0x0f << V_INTR_PRIO_SHIFT)
183
184 #define V_IGN_TPR_SHIFT 20
185 #define V_IGN_TPR_MASK (1 << V_IGN_TPR_SHIFT)
186
187 #define V_IRQ_INJECTION_BITS_MASK (V_IRQ_MASK | V_INTR_PRIO_MASK | V_IGN_TPR_MASK)
188
189 #define V_INTR_MASKING_SHIFT 24
190 #define V_INTR_MASKING_MASK (1 << V_INTR_MASKING_SHIFT)
191
192 #define V_GIF_ENABLE_SHIFT 25
193 #define V_GIF_ENABLE_MASK (1 << V_GIF_ENABLE_SHIFT)
194
195 #define AVIC_ENABLE_SHIFT 31
196 #define AVIC_ENABLE_MASK (1 << AVIC_ENABLE_SHIFT)
197
198 #define LBR_CTL_ENABLE_MASK BIT_ULL(0)
199 #define VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK BIT_ULL(1)
200
201 #define SVM_INTERRUPT_SHADOW_MASK BIT_ULL(0)
202 #define SVM_GUEST_INTERRUPT_MASK BIT_ULL(1)
203
204 #define SVM_IOIO_STR_SHIFT 2
205 #define SVM_IOIO_REP_SHIFT 3
206 #define SVM_IOIO_SIZE_SHIFT 4
207 #define SVM_IOIO_ASIZE_SHIFT 7
208
209 #define SVM_IOIO_TYPE_MASK 1
210 #define SVM_IOIO_STR_MASK (1 << SVM_IOIO_STR_SHIFT)
211 #define SVM_IOIO_REP_MASK (1 << SVM_IOIO_REP_SHIFT)
212 #define SVM_IOIO_SIZE_MASK (7 << SVM_IOIO_SIZE_SHIFT)
213 #define SVM_IOIO_ASIZE_MASK (7 << SVM_IOIO_ASIZE_SHIFT)
214
215 #define SVM_VM_CR_VALID_MASK 0x001fULL
216 #define SVM_VM_CR_SVM_LOCK_MASK 0x0008ULL
217 #define SVM_VM_CR_SVM_DIS_MASK 0x0010ULL
218
219 #define SVM_NESTED_CTL_NP_ENABLE BIT(0)
220 #define SVM_NESTED_CTL_SEV_ENABLE BIT(1)
221 #define SVM_NESTED_CTL_SEV_ES_ENABLE BIT(2)
222
223 struct vmcb_seg {
224 u16 selector;
225 u16 attrib;
226 u32 limit;
227 u64 base;
228 } __packed;
229
230 struct vmcb_save_area {
231 struct vmcb_seg es;
232 struct vmcb_seg cs;
233 struct vmcb_seg ss;
234 struct vmcb_seg ds;
235 struct vmcb_seg fs;
236 struct vmcb_seg gs;
237 struct vmcb_seg gdtr;
238 struct vmcb_seg ldtr;
239 struct vmcb_seg idtr;
240 struct vmcb_seg tr;
241 u8 reserved_1[43];
242 u8 cpl;
243 u8 reserved_2[4];
244 u64 efer;
245 u8 reserved_3[104];
246 u64 xss; /* Valid for SEV-ES only */
247 u64 cr4;
248 u64 cr3;
249 u64 cr0;
250 u64 dr7;
251 u64 dr6;
252 u64 rflags;
253 u64 rip;
254 u8 reserved_4[88];
255 u64 rsp;
256 u8 reserved_5[24];
257 u64 rax;
258 u64 star;
259 u64 lstar;
260 u64 cstar;
261 u64 sfmask;
262 u64 kernel_gs_base;
263 u64 sysenter_cs;
264 u64 sysenter_esp;
265 u64 sysenter_eip;
266 u64 cr2;
267 u8 reserved_6[32];
268 u64 g_pat;
269 u64 dbgctl;
270 u64 br_from;
271 u64 br_to;
272 u64 last_excp_from;
273 u64 last_excp_to;
274
275 /*
276 * The following part of the save area is valid only for
277 * SEV-ES guests when referenced through the GHCB or for
278 * saving to the host save area.
279 */
280 u8 reserved_7[72];
281 u32 spec_ctrl; /* Guest version of SPEC_CTRL at 0x2E0 */
282 u8 reserved_7b[4];
283 u32 pkru;
284 u8 reserved_7a[20];
285 u64 reserved_8; /* rax already available at 0x01f8 */
286 u64 rcx;
287 u64 rdx;
288 u64 rbx;
289 u64 reserved_9; /* rsp already available at 0x01d8 */
290 u64 rbp;
291 u64 rsi;
292 u64 rdi;
293 u64 r8;
294 u64 r9;
295 u64 r10;
296 u64 r11;
297 u64 r12;
298 u64 r13;
299 u64 r14;
300 u64 r15;
301 u8 reserved_10[16];
302 u64 sw_exit_code;
303 u64 sw_exit_info_1;
304 u64 sw_exit_info_2;
305 u64 sw_scratch;
306 u8 reserved_11[56];
307 u64 xcr0;
308 u8 valid_bitmap[16];
309 u64 x87_state_gpa;
310 } __packed;
311
312 struct ghcb {
313 struct vmcb_save_area save;
314 u8 reserved_save[2048 - sizeof(struct vmcb_save_area)];
315
316 u8 shared_buffer[2032];
317
318 u8 reserved_1[10];
319 u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */
320 u32 ghcb_usage;
321 } __packed;
322
323
324 #define EXPECTED_VMCB_SAVE_AREA_SIZE 1032
325 #define EXPECTED_VMCB_CONTROL_AREA_SIZE 1024
326 #define EXPECTED_GHCB_SIZE PAGE_SIZE
327
__unused_size_checks(void)328 static inline void __unused_size_checks(void)
329 {
330 BUILD_BUG_ON(sizeof(struct vmcb_save_area) != EXPECTED_VMCB_SAVE_AREA_SIZE);
331 BUILD_BUG_ON(sizeof(struct vmcb_control_area) != EXPECTED_VMCB_CONTROL_AREA_SIZE);
332 BUILD_BUG_ON(sizeof(struct ghcb) != EXPECTED_GHCB_SIZE);
333 }
334
335 struct vmcb {
336 struct vmcb_control_area control;
337 struct vmcb_save_area save;
338 } __packed;
339
340 #define SVM_CPUID_FUNC 0x8000000a
341
342 #define SVM_VM_CR_SVM_DISABLE 4
343
344 #define SVM_SELECTOR_S_SHIFT 4
345 #define SVM_SELECTOR_DPL_SHIFT 5
346 #define SVM_SELECTOR_P_SHIFT 7
347 #define SVM_SELECTOR_AVL_SHIFT 8
348 #define SVM_SELECTOR_L_SHIFT 9
349 #define SVM_SELECTOR_DB_SHIFT 10
350 #define SVM_SELECTOR_G_SHIFT 11
351
352 #define SVM_SELECTOR_TYPE_MASK (0xf)
353 #define SVM_SELECTOR_S_MASK (1 << SVM_SELECTOR_S_SHIFT)
354 #define SVM_SELECTOR_DPL_MASK (3 << SVM_SELECTOR_DPL_SHIFT)
355 #define SVM_SELECTOR_P_MASK (1 << SVM_SELECTOR_P_SHIFT)
356 #define SVM_SELECTOR_AVL_MASK (1 << SVM_SELECTOR_AVL_SHIFT)
357 #define SVM_SELECTOR_L_MASK (1 << SVM_SELECTOR_L_SHIFT)
358 #define SVM_SELECTOR_DB_MASK (1 << SVM_SELECTOR_DB_SHIFT)
359 #define SVM_SELECTOR_G_MASK (1 << SVM_SELECTOR_G_SHIFT)
360
361 #define SVM_SELECTOR_WRITE_MASK (1 << 1)
362 #define SVM_SELECTOR_READ_MASK SVM_SELECTOR_WRITE_MASK
363 #define SVM_SELECTOR_CODE_MASK (1 << 3)
364
365 #define SVM_EVTINJ_VEC_MASK 0xff
366
367 #define SVM_EVTINJ_TYPE_SHIFT 8
368 #define SVM_EVTINJ_TYPE_MASK (7 << SVM_EVTINJ_TYPE_SHIFT)
369
370 #define SVM_EVTINJ_TYPE_INTR (0 << SVM_EVTINJ_TYPE_SHIFT)
371 #define SVM_EVTINJ_TYPE_NMI (2 << SVM_EVTINJ_TYPE_SHIFT)
372 #define SVM_EVTINJ_TYPE_EXEPT (3 << SVM_EVTINJ_TYPE_SHIFT)
373 #define SVM_EVTINJ_TYPE_SOFT (4 << SVM_EVTINJ_TYPE_SHIFT)
374
375 #define SVM_EVTINJ_VALID (1 << 31)
376 #define SVM_EVTINJ_VALID_ERR (1 << 11)
377
378 #define SVM_EXITINTINFO_VEC_MASK SVM_EVTINJ_VEC_MASK
379 #define SVM_EXITINTINFO_TYPE_MASK SVM_EVTINJ_TYPE_MASK
380
381 #define SVM_EXITINTINFO_TYPE_INTR SVM_EVTINJ_TYPE_INTR
382 #define SVM_EXITINTINFO_TYPE_NMI SVM_EVTINJ_TYPE_NMI
383 #define SVM_EXITINTINFO_TYPE_EXEPT SVM_EVTINJ_TYPE_EXEPT
384 #define SVM_EXITINTINFO_TYPE_SOFT SVM_EVTINJ_TYPE_SOFT
385
386 #define SVM_EXITINTINFO_VALID SVM_EVTINJ_VALID
387 #define SVM_EXITINTINFO_VALID_ERR SVM_EVTINJ_VALID_ERR
388
389 #define SVM_EXITINFOSHIFT_TS_REASON_IRET 36
390 #define SVM_EXITINFOSHIFT_TS_REASON_JMP 38
391 #define SVM_EXITINFOSHIFT_TS_HAS_ERROR_CODE 44
392
393 #define SVM_EXITINFO_REG_MASK 0x0F
394
395 #define SVM_CR0_SELECTIVE_MASK (X86_CR0_TS | X86_CR0_MP)
396
397 /* GHCB Accessor functions */
398
399 #define GHCB_BITMAP_IDX(field) \
400 (offsetof(struct vmcb_save_area, field) / sizeof(u64))
401
402 #define DEFINE_GHCB_ACCESSORS(field) \
403 static inline bool ghcb_##field##_is_valid(const struct ghcb *ghcb) \
404 { \
405 return test_bit(GHCB_BITMAP_IDX(field), \
406 (unsigned long *)&ghcb->save.valid_bitmap); \
407 } \
408 \
409 static inline u64 ghcb_get_##field(struct ghcb *ghcb) \
410 { \
411 return ghcb->save.field; \
412 } \
413 \
414 static inline u64 ghcb_get_##field##_if_valid(struct ghcb *ghcb) \
415 { \
416 return ghcb_##field##_is_valid(ghcb) ? ghcb->save.field : 0; \
417 } \
418 \
419 static inline void ghcb_set_##field(struct ghcb *ghcb, u64 value) \
420 { \
421 __set_bit(GHCB_BITMAP_IDX(field), \
422 (unsigned long *)&ghcb->save.valid_bitmap); \
423 ghcb->save.field = value; \
424 }
425
426 DEFINE_GHCB_ACCESSORS(cpl)
427 DEFINE_GHCB_ACCESSORS(rip)
428 DEFINE_GHCB_ACCESSORS(rsp)
429 DEFINE_GHCB_ACCESSORS(rax)
430 DEFINE_GHCB_ACCESSORS(rcx)
431 DEFINE_GHCB_ACCESSORS(rdx)
432 DEFINE_GHCB_ACCESSORS(rbx)
433 DEFINE_GHCB_ACCESSORS(rbp)
434 DEFINE_GHCB_ACCESSORS(rsi)
435 DEFINE_GHCB_ACCESSORS(rdi)
436 DEFINE_GHCB_ACCESSORS(r8)
437 DEFINE_GHCB_ACCESSORS(r9)
438 DEFINE_GHCB_ACCESSORS(r10)
439 DEFINE_GHCB_ACCESSORS(r11)
440 DEFINE_GHCB_ACCESSORS(r12)
441 DEFINE_GHCB_ACCESSORS(r13)
442 DEFINE_GHCB_ACCESSORS(r14)
443 DEFINE_GHCB_ACCESSORS(r15)
444 DEFINE_GHCB_ACCESSORS(sw_exit_code)
445 DEFINE_GHCB_ACCESSORS(sw_exit_info_1)
446 DEFINE_GHCB_ACCESSORS(sw_exit_info_2)
447 DEFINE_GHCB_ACCESSORS(sw_scratch)
448 DEFINE_GHCB_ACCESSORS(xcr0)
449
450 #endif
451