1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * AMD Encrypted Register State Support
4 *
5 * Author: Joerg Roedel <jroedel@suse.de>
6 */
7
8 #ifndef __ASM_ENCRYPTED_STATE_H
9 #define __ASM_ENCRYPTED_STATE_H
10
11 #include <linux/types.h>
12 #include <linux/sev-guest.h>
13
14 #include <asm/insn.h>
15 #include <asm/sev-common.h>
16 #include <asm/coco.h>
17 #include <asm/set_memory.h>
18 #include <asm/svm.h>
19
20 #define GHCB_PROTOCOL_MIN 1ULL
21 #define GHCB_PROTOCOL_MAX 2ULL
22 #define GHCB_DEFAULT_USAGE 0ULL
23
24 #define VMGEXIT() { asm volatile("rep; vmmcall\n\r"); }
25
26 struct boot_params;
27
28 enum es_result {
29 ES_OK, /* All good */
30 ES_UNSUPPORTED, /* Requested operation not supported */
31 ES_VMM_ERROR, /* Unexpected state from the VMM */
32 ES_DECODE_FAILED, /* Instruction decoding failed */
33 ES_EXCEPTION, /* Instruction caused exception */
34 ES_RETRY, /* Retry instruction emulation */
35 };
36
37 struct es_fault_info {
38 unsigned long vector;
39 unsigned long error_code;
40 unsigned long cr2;
41 };
42
43 struct pt_regs;
44
45 /* ES instruction emulation context */
46 struct es_em_ctxt {
47 struct pt_regs *regs;
48 struct insn insn;
49 struct es_fault_info fi;
50 };
51
52 /*
53 * AMD SEV Confidential computing blob structure. The structure is
54 * defined in OVMF UEFI firmware header:
55 * https://github.com/tianocore/edk2/blob/master/OvmfPkg/Include/Guid/ConfidentialComputingSevSnpBlob.h
56 */
57 #define CC_BLOB_SEV_HDR_MAGIC 0x45444d41
58 struct cc_blob_sev_info {
59 u32 magic;
60 u16 version;
61 u16 reserved;
62 u64 secrets_phys;
63 u32 secrets_len;
64 u32 rsvd1;
65 u64 cpuid_phys;
66 u32 cpuid_len;
67 u32 rsvd2;
68 } __packed;
69
70 void do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code);
71
lower_bits(u64 val,unsigned int bits)72 static inline u64 lower_bits(u64 val, unsigned int bits)
73 {
74 u64 mask = (1ULL << bits) - 1;
75
76 return (val & mask);
77 }
78
79 struct real_mode_header;
80 enum stack_type;
81
82 /* Early IDT entry points for #VC handler */
83 extern void vc_no_ghcb(void);
84 extern void vc_boot_ghcb(void);
85 extern bool handle_vc_boot_ghcb(struct pt_regs *regs);
86
87 /*
88 * Individual entries of the SNP CPUID table, as defined by the SNP
89 * Firmware ABI, Revision 0.9, Section 7.1, Table 14.
90 */
91 struct snp_cpuid_fn {
92 u32 eax_in;
93 u32 ecx_in;
94 u64 xcr0_in;
95 u64 xss_in;
96 u32 eax;
97 u32 ebx;
98 u32 ecx;
99 u32 edx;
100 u64 __reserved;
101 } __packed;
102
103 /*
104 * SNP CPUID table, as defined by the SNP Firmware ABI, Revision 0.9,
105 * Section 8.14.2.6. Also noted there is the SNP firmware-enforced limit
106 * of 64 entries per CPUID table.
107 */
108 #define SNP_CPUID_COUNT_MAX 64
109
110 struct snp_cpuid_table {
111 u32 count;
112 u32 __reserved1;
113 u64 __reserved2;
114 struct snp_cpuid_fn fn[SNP_CPUID_COUNT_MAX];
115 } __packed;
116
117 /* PVALIDATE return codes */
118 #define PVALIDATE_FAIL_SIZEMISMATCH 6
119
120 /* Software defined (when rFlags.CF = 1) */
121 #define PVALIDATE_FAIL_NOUPDATE 255
122
123 /* RMUPDATE detected 4K page and 2MB page overlap. */
124 #define RMPUPDATE_FAIL_OVERLAP 4
125
126 /* PSMASH failed due to concurrent access by another CPU */
127 #define PSMASH_FAIL_INUSE 3
128
129 /* RMP page size */
130 #define RMP_PG_SIZE_4K 0
131 #define RMP_PG_SIZE_2M 1
132 #define RMP_TO_PG_LEVEL(level) (((level) == RMP_PG_SIZE_4K) ? PG_LEVEL_4K : PG_LEVEL_2M)
133 #define PG_LEVEL_TO_RMP(level) (((level) == PG_LEVEL_4K) ? RMP_PG_SIZE_4K : RMP_PG_SIZE_2M)
134
135 struct rmp_state {
136 u64 gpa;
137 u8 assigned;
138 u8 pagesize;
139 u8 immutable;
140 u8 rsvd;
141 u32 asid;
142 } __packed;
143
144 #define RMPADJUST_VMSA_PAGE_BIT BIT(16)
145
146 /* SNP Guest message request */
147 struct snp_req_data {
148 unsigned long req_gpa;
149 unsigned long resp_gpa;
150 unsigned long data_gpa;
151 unsigned int data_npages;
152 };
153
154 #define MAX_AUTHTAG_LEN 32
155 #define AUTHTAG_LEN 16
156 #define AAD_LEN 48
157 #define MSG_HDR_VER 1
158
159 #define SNP_REQ_MAX_RETRY_DURATION (60*HZ)
160 #define SNP_REQ_RETRY_DELAY (2*HZ)
161
162 /* See SNP spec SNP_GUEST_REQUEST section for the structure */
163 enum msg_type {
164 SNP_MSG_TYPE_INVALID = 0,
165 SNP_MSG_CPUID_REQ,
166 SNP_MSG_CPUID_RSP,
167 SNP_MSG_KEY_REQ,
168 SNP_MSG_KEY_RSP,
169 SNP_MSG_REPORT_REQ,
170 SNP_MSG_REPORT_RSP,
171 SNP_MSG_EXPORT_REQ,
172 SNP_MSG_EXPORT_RSP,
173 SNP_MSG_IMPORT_REQ,
174 SNP_MSG_IMPORT_RSP,
175 SNP_MSG_ABSORB_REQ,
176 SNP_MSG_ABSORB_RSP,
177 SNP_MSG_VMRK_REQ,
178 SNP_MSG_VMRK_RSP,
179
180 SNP_MSG_TSC_INFO_REQ = 17,
181 SNP_MSG_TSC_INFO_RSP,
182
183 SNP_MSG_TYPE_MAX
184 };
185
186 enum aead_algo {
187 SNP_AEAD_INVALID,
188 SNP_AEAD_AES_256_GCM,
189 };
190
191 struct snp_guest_msg_hdr {
192 u8 authtag[MAX_AUTHTAG_LEN];
193 u64 msg_seqno;
194 u8 rsvd1[8];
195 u8 algo;
196 u8 hdr_version;
197 u16 hdr_sz;
198 u8 msg_type;
199 u8 msg_version;
200 u16 msg_sz;
201 u32 rsvd2;
202 u8 msg_vmpck;
203 u8 rsvd3[35];
204 } __packed;
205
206 struct snp_guest_msg {
207 struct snp_guest_msg_hdr hdr;
208 u8 payload[PAGE_SIZE - sizeof(struct snp_guest_msg_hdr)];
209 } __packed;
210
211 #define SNP_TSC_INFO_REQ_SZ 128
212
213 struct snp_tsc_info_req {
214 u8 rsvd[SNP_TSC_INFO_REQ_SZ];
215 } __packed;
216
217 struct snp_tsc_info_resp {
218 u32 status;
219 u32 rsvd1;
220 u64 tsc_scale;
221 u64 tsc_offset;
222 u32 tsc_factor;
223 u8 rsvd2[100];
224 } __packed;
225
226 /*
227 * Obtain the mean TSC frequency by decreasing the nominal TSC frequency with
228 * TSC_FACTOR as documented in the SNP Firmware ABI specification:
229 *
230 * GUEST_TSC_FREQ * (1 - (TSC_FACTOR * 0.00001))
231 *
232 * which is equivalent to:
233 *
234 * GUEST_TSC_FREQ -= (GUEST_TSC_FREQ * TSC_FACTOR) / 100000;
235 */
236 #define SNP_SCALE_TSC_FREQ(freq, factor) ((freq) - (freq) * (factor) / 100000)
237
238 struct snp_guest_req {
239 void *req_buf;
240 size_t req_sz;
241
242 void *resp_buf;
243 size_t resp_sz;
244
245 u64 exit_code;
246 u64 exitinfo2;
247 unsigned int vmpck_id;
248 u8 msg_version;
249 u8 msg_type;
250
251 struct snp_req_data input;
252 void *certs_data;
253 };
254
255 /*
256 * The secrets page contains 96-bytes of reserved field that can be used by
257 * the guest OS. The guest OS uses the area to save the message sequence
258 * number for each VMPCK.
259 *
260 * See the GHCB spec section Secret page layout for the format for this area.
261 */
262 struct secrets_os_area {
263 u32 msg_seqno_0;
264 u32 msg_seqno_1;
265 u32 msg_seqno_2;
266 u32 msg_seqno_3;
267 u64 ap_jump_table_pa;
268 u8 rsvd[40];
269 u8 guest_usage[32];
270 } __packed;
271
272 #define VMPCK_KEY_LEN 32
273
274 /* See the SNP spec version 0.9 for secrets page format */
275 struct snp_secrets_page {
276 u32 version;
277 u32 imien : 1,
278 rsvd1 : 31;
279 u32 fms;
280 u32 rsvd2;
281 u8 gosvw[16];
282 u8 vmpck0[VMPCK_KEY_LEN];
283 u8 vmpck1[VMPCK_KEY_LEN];
284 u8 vmpck2[VMPCK_KEY_LEN];
285 u8 vmpck3[VMPCK_KEY_LEN];
286 struct secrets_os_area os_area;
287
288 u8 vmsa_tweak_bitmap[64];
289
290 /* SVSM fields */
291 u64 svsm_base;
292 u64 svsm_size;
293 u64 svsm_caa;
294 u32 svsm_max_version;
295 u8 svsm_guest_vmpl;
296 u8 rsvd3[3];
297
298 /* The percentage decrease from nominal to mean TSC frequency. */
299 u32 tsc_factor;
300
301 /* Remainder of page */
302 u8 rsvd4[3740];
303 } __packed;
304
305 struct snp_msg_desc {
306 /* request and response are in unencrypted memory */
307 struct snp_guest_msg *request, *response;
308
309 /*
310 * Avoid information leakage by double-buffering shared messages
311 * in fields that are in regular encrypted memory.
312 */
313 struct snp_guest_msg secret_request, secret_response;
314
315 struct snp_secrets_page *secrets;
316
317 struct aesgcm_ctx *ctx;
318
319 u32 *os_area_msg_seqno;
320 u8 *vmpck;
321 int vmpck_id;
322 };
323
324 /*
325 * The SVSM Calling Area (CA) related structures.
326 */
327 struct svsm_ca {
328 u8 call_pending;
329 u8 mem_available;
330 u8 rsvd1[6];
331
332 u8 svsm_buffer[PAGE_SIZE - 8];
333 };
334
335 #define SVSM_SUCCESS 0
336 #define SVSM_ERR_INCOMPLETE 0x80000000
337 #define SVSM_ERR_UNSUPPORTED_PROTOCOL 0x80000001
338 #define SVSM_ERR_UNSUPPORTED_CALL 0x80000002
339 #define SVSM_ERR_INVALID_ADDRESS 0x80000003
340 #define SVSM_ERR_INVALID_FORMAT 0x80000004
341 #define SVSM_ERR_INVALID_PARAMETER 0x80000005
342 #define SVSM_ERR_INVALID_REQUEST 0x80000006
343 #define SVSM_ERR_BUSY 0x80000007
344 #define SVSM_PVALIDATE_FAIL_SIZEMISMATCH 0x80001006
345
346 /*
347 * The SVSM PVALIDATE related structures
348 */
349 struct svsm_pvalidate_entry {
350 u64 page_size : 2,
351 action : 1,
352 ignore_cf : 1,
353 rsvd : 8,
354 pfn : 52;
355 };
356
357 struct svsm_pvalidate_call {
358 u16 num_entries;
359 u16 cur_index;
360
361 u8 rsvd1[4];
362
363 struct svsm_pvalidate_entry entry[];
364 };
365
366 #define SVSM_PVALIDATE_MAX_COUNT ((sizeof_field(struct svsm_ca, svsm_buffer) - \
367 offsetof(struct svsm_pvalidate_call, entry)) / \
368 sizeof(struct svsm_pvalidate_entry))
369
370 /*
371 * The SVSM Attestation related structures
372 */
373 struct svsm_loc_entry {
374 u64 pa;
375 u32 len;
376 u8 rsvd[4];
377 };
378
379 struct svsm_attest_call {
380 struct svsm_loc_entry report_buf;
381 struct svsm_loc_entry nonce;
382 struct svsm_loc_entry manifest_buf;
383 struct svsm_loc_entry certificates_buf;
384
385 /* For attesting a single service */
386 u8 service_guid[16];
387 u32 service_manifest_ver;
388 u8 rsvd[4];
389 };
390
391 /* PTE descriptor used for the prepare_pte_enc() operations. */
392 struct pte_enc_desc {
393 pte_t *kpte;
394 int pte_level;
395 bool encrypt;
396 /* pfn of the kpte above */
397 unsigned long pfn;
398 /* physical address of @pfn */
399 unsigned long pa;
400 /* virtual address of @pfn */
401 void *va;
402 /* memory covered by the pte */
403 unsigned long size;
404 pgprot_t new_pgprot;
405 };
406
407 /*
408 * SVSM protocol structure
409 */
410 struct svsm_call {
411 struct svsm_ca *caa;
412 u64 rax;
413 u64 rcx;
414 u64 rdx;
415 u64 r8;
416 u64 r9;
417 u64 rax_out;
418 u64 rcx_out;
419 u64 rdx_out;
420 u64 r8_out;
421 u64 r9_out;
422 };
423
424 #define SVSM_CORE_CALL(x) ((0ULL << 32) | (x))
425 #define SVSM_CORE_REMAP_CA 0
426 #define SVSM_CORE_PVALIDATE 1
427 #define SVSM_CORE_CREATE_VCPU 2
428 #define SVSM_CORE_DELETE_VCPU 3
429
430 #define SVSM_ATTEST_CALL(x) ((1ULL << 32) | (x))
431 #define SVSM_ATTEST_SERVICES 0
432 #define SVSM_ATTEST_SINGLE_SERVICE 1
433
434 #define SVSM_VTPM_CALL(x) ((2ULL << 32) | (x))
435 #define SVSM_VTPM_QUERY 0
436 #define SVSM_VTPM_CMD 1
437
438 #ifdef CONFIG_AMD_MEM_ENCRYPT
439
440 extern u8 snp_vmpl;
441
442 extern void __sev_es_ist_enter(struct pt_regs *regs);
443 extern void __sev_es_ist_exit(void);
sev_es_ist_enter(struct pt_regs * regs)444 static __always_inline void sev_es_ist_enter(struct pt_regs *regs)
445 {
446 if (cc_vendor == CC_VENDOR_AMD &&
447 cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT))
448 __sev_es_ist_enter(regs);
449 }
sev_es_ist_exit(void)450 static __always_inline void sev_es_ist_exit(void)
451 {
452 if (cc_vendor == CC_VENDOR_AMD &&
453 cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT))
454 __sev_es_ist_exit();
455 }
456 extern int sev_es_setup_ap_jump_table(struct real_mode_header *rmh);
457 extern void __sev_es_nmi_complete(void);
sev_es_nmi_complete(void)458 static __always_inline void sev_es_nmi_complete(void)
459 {
460 if (cc_vendor == CC_VENDOR_AMD &&
461 cc_platform_has(CC_ATTR_GUEST_STATE_ENCRYPT))
462 __sev_es_nmi_complete();
463 }
464 extern int __init sev_es_efi_map_ghcbs_cas(pgd_t *pgd);
465 extern void sev_enable(struct boot_params *bp);
466
467 /*
468 * RMPADJUST modifies the RMP permissions of a page of a lesser-
469 * privileged (numerically higher) VMPL.
470 *
471 * If the guest is running at a higher-privilege than the privilege
472 * level the instruction is targeting, the instruction will succeed,
473 * otherwise, it will fail.
474 */
rmpadjust(unsigned long vaddr,bool rmp_psize,unsigned long attrs)475 static inline int rmpadjust(unsigned long vaddr, bool rmp_psize, unsigned long attrs)
476 {
477 int rc;
478
479 /* "rmpadjust" mnemonic support in binutils 2.36 and newer */
480 asm volatile(".byte 0xF3,0x0F,0x01,0xFE\n\t"
481 : "=a"(rc)
482 : "a"(vaddr), "c"(rmp_psize), "d"(attrs)
483 : "memory", "cc");
484
485 return rc;
486 }
pvalidate(unsigned long vaddr,bool rmp_psize,bool validate)487 static inline int pvalidate(unsigned long vaddr, bool rmp_psize, bool validate)
488 {
489 bool no_rmpupdate;
490 int rc;
491
492 /* "pvalidate" mnemonic support in binutils 2.36 and newer */
493 asm volatile(".byte 0xF2, 0x0F, 0x01, 0xFF\n\t"
494 : "=@ccc"(no_rmpupdate), "=a"(rc)
495 : "a"(vaddr), "c"(rmp_psize), "d"(validate)
496 : "memory", "cc");
497
498 if (no_rmpupdate)
499 return PVALIDATE_FAIL_NOUPDATE;
500
501 return rc;
502 }
503
504 void setup_ghcb(void);
505 void snp_register_ghcb_early(unsigned long paddr);
506 void early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr,
507 unsigned long npages);
508 void early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr,
509 unsigned long npages);
510 void snp_set_memory_shared(unsigned long vaddr, unsigned long npages);
511 void snp_set_memory_private(unsigned long vaddr, unsigned long npages);
512 void snp_set_wakeup_secondary_cpu(void);
513 bool snp_init(struct boot_params *bp);
514 void snp_dmi_setup(void);
515 int snp_issue_svsm_attest_req(u64 call_id, struct svsm_call *call, struct svsm_attest_call *input);
516 void snp_accept_memory(phys_addr_t start, phys_addr_t end);
517 u64 snp_get_unsupported_features(u64 status);
518 u64 sev_get_status(void);
519 void sev_show_status(void);
520 int prepare_pte_enc(struct pte_enc_desc *d);
521 void set_pte_enc_mask(pte_t *kpte, unsigned long pfn, pgprot_t new_prot);
522 void snp_kexec_finish(void);
523 void snp_kexec_begin(void);
524
525 int snp_msg_init(struct snp_msg_desc *mdesc, int vmpck_id);
526 struct snp_msg_desc *snp_msg_alloc(void);
527 void snp_msg_free(struct snp_msg_desc *mdesc);
528 int snp_send_guest_request(struct snp_msg_desc *mdesc, struct snp_guest_req *req);
529
530 int snp_svsm_vtpm_send_command(u8 *buffer);
531
532 void __init snp_secure_tsc_prepare(void);
533 void __init snp_secure_tsc_init(void);
534 enum es_result savic_register_gpa(u64 gpa);
535 enum es_result savic_unregister_gpa(u64 *gpa);
536 u64 savic_ghcb_msr_read(u32 reg);
537 void savic_ghcb_msr_write(u32 reg, u64 value);
538
vc_ghcb_invalidate(struct ghcb * ghcb)539 static __always_inline void vc_ghcb_invalidate(struct ghcb *ghcb)
540 {
541 ghcb->save.sw_exit_code = 0;
542 __builtin_memset(ghcb->save.valid_bitmap, 0, sizeof(ghcb->save.valid_bitmap));
543 }
544
545 /* I/O parameters for CPUID-related helpers */
546 struct cpuid_leaf {
547 u32 fn;
548 u32 subfn;
549 u32 eax;
550 u32 ebx;
551 u32 ecx;
552 u32 edx;
553 };
554
555 int svsm_perform_msr_protocol(struct svsm_call *call);
556 int __pi_svsm_perform_msr_protocol(struct svsm_call *call);
557 int snp_cpuid(void (*cpuid_fn)(void *ctx, struct cpuid_leaf *leaf),
558 void *ctx, struct cpuid_leaf *leaf);
559
560 void svsm_issue_call(struct svsm_call *call, u8 *pending);
561 int svsm_process_result_codes(struct svsm_call *call);
562
563 void __noreturn sev_es_terminate(unsigned int set, unsigned int reason);
564 enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,
565 struct es_em_ctxt *ctxt,
566 u64 exit_code, u64 exit_info_1,
567 u64 exit_info_2);
568
569 bool sev_es_negotiate_protocol(void);
570 bool sev_es_check_cpu_features(void);
571
572 extern u16 ghcb_version;
573 extern struct ghcb *boot_ghcb;
574 extern bool sev_snp_needs_sfw;
575
576 struct psc_desc {
577 enum psc_op op;
578 struct svsm_ca *ca;
579 u64 caa_pa;
580 };
581
sev_evict_cache(void * va,int npages)582 static inline void sev_evict_cache(void *va, int npages)
583 {
584 volatile u8 val __always_unused;
585 u8 *bytes = va;
586 int page_idx;
587
588 /*
589 * For SEV guests, a read from the first/last cache-lines of a 4K page
590 * using the guest key is sufficient to cause a flush of all cache-lines
591 * associated with that 4K page without incurring all the overhead of a
592 * full CLFLUSH sequence.
593 */
594 for (page_idx = 0; page_idx < npages; page_idx++) {
595 val = bytes[page_idx * PAGE_SIZE];
596 val = bytes[page_idx * PAGE_SIZE + PAGE_SIZE - 1];
597 }
598 }
599
600 #else /* !CONFIG_AMD_MEM_ENCRYPT */
601
602 #define snp_vmpl 0
sev_es_ist_enter(struct pt_regs * regs)603 static inline void sev_es_ist_enter(struct pt_regs *regs) { }
sev_es_ist_exit(void)604 static inline void sev_es_ist_exit(void) { }
sev_es_setup_ap_jump_table(struct real_mode_header * rmh)605 static inline int sev_es_setup_ap_jump_table(struct real_mode_header *rmh) { return 0; }
sev_es_nmi_complete(void)606 static inline void sev_es_nmi_complete(void) { }
sev_es_efi_map_ghcbs_cas(pgd_t * pgd)607 static inline int sev_es_efi_map_ghcbs_cas(pgd_t *pgd) { return 0; }
sev_enable(struct boot_params * bp)608 static inline void sev_enable(struct boot_params *bp) { }
pvalidate(unsigned long vaddr,bool rmp_psize,bool validate)609 static inline int pvalidate(unsigned long vaddr, bool rmp_psize, bool validate) { return 0; }
rmpadjust(unsigned long vaddr,bool rmp_psize,unsigned long attrs)610 static inline int rmpadjust(unsigned long vaddr, bool rmp_psize, unsigned long attrs) { return 0; }
setup_ghcb(void)611 static inline void setup_ghcb(void) { }
612 static inline void __init
early_snp_set_memory_private(unsigned long vaddr,unsigned long paddr,unsigned long npages)613 early_snp_set_memory_private(unsigned long vaddr, unsigned long paddr, unsigned long npages) { }
614 static inline void __init
early_snp_set_memory_shared(unsigned long vaddr,unsigned long paddr,unsigned long npages)615 early_snp_set_memory_shared(unsigned long vaddr, unsigned long paddr, unsigned long npages) { }
snp_set_memory_shared(unsigned long vaddr,unsigned long npages)616 static inline void snp_set_memory_shared(unsigned long vaddr, unsigned long npages) { }
snp_set_memory_private(unsigned long vaddr,unsigned long npages)617 static inline void snp_set_memory_private(unsigned long vaddr, unsigned long npages) { }
snp_set_wakeup_secondary_cpu(void)618 static inline void snp_set_wakeup_secondary_cpu(void) { }
snp_init(struct boot_params * bp)619 static inline bool snp_init(struct boot_params *bp) { return false; }
snp_dmi_setup(void)620 static inline void snp_dmi_setup(void) { }
snp_issue_svsm_attest_req(u64 call_id,struct svsm_call * call,struct svsm_attest_call * input)621 static inline int snp_issue_svsm_attest_req(u64 call_id, struct svsm_call *call, struct svsm_attest_call *input)
622 {
623 return -ENOTTY;
624 }
snp_accept_memory(phys_addr_t start,phys_addr_t end)625 static inline void snp_accept_memory(phys_addr_t start, phys_addr_t end) { }
snp_get_unsupported_features(u64 status)626 static inline u64 snp_get_unsupported_features(u64 status) { return 0; }
sev_get_status(void)627 static inline u64 sev_get_status(void) { return 0; }
sev_show_status(void)628 static inline void sev_show_status(void) { }
prepare_pte_enc(struct pte_enc_desc * d)629 static inline int prepare_pte_enc(struct pte_enc_desc *d) { return 0; }
set_pte_enc_mask(pte_t * kpte,unsigned long pfn,pgprot_t new_prot)630 static inline void set_pte_enc_mask(pte_t *kpte, unsigned long pfn, pgprot_t new_prot) { }
snp_kexec_finish(void)631 static inline void snp_kexec_finish(void) { }
snp_kexec_begin(void)632 static inline void snp_kexec_begin(void) { }
snp_msg_init(struct snp_msg_desc * mdesc,int vmpck_id)633 static inline int snp_msg_init(struct snp_msg_desc *mdesc, int vmpck_id) { return -1; }
snp_msg_alloc(void)634 static inline struct snp_msg_desc *snp_msg_alloc(void) { return NULL; }
snp_msg_free(struct snp_msg_desc * mdesc)635 static inline void snp_msg_free(struct snp_msg_desc *mdesc) { }
snp_send_guest_request(struct snp_msg_desc * mdesc,struct snp_guest_req * req)636 static inline int snp_send_guest_request(struct snp_msg_desc *mdesc,
637 struct snp_guest_req *req) { return -ENODEV; }
snp_svsm_vtpm_send_command(u8 * buffer)638 static inline int snp_svsm_vtpm_send_command(u8 *buffer) { return -ENODEV; }
snp_secure_tsc_prepare(void)639 static inline void __init snp_secure_tsc_prepare(void) { }
snp_secure_tsc_init(void)640 static inline void __init snp_secure_tsc_init(void) { }
sev_evict_cache(void * va,int npages)641 static inline void sev_evict_cache(void *va, int npages) {}
savic_register_gpa(u64 gpa)642 static inline enum es_result savic_register_gpa(u64 gpa) { return ES_UNSUPPORTED; }
savic_unregister_gpa(u64 * gpa)643 static inline enum es_result savic_unregister_gpa(u64 *gpa) { return ES_UNSUPPORTED; }
savic_ghcb_msr_write(u32 reg,u64 value)644 static inline void savic_ghcb_msr_write(u32 reg, u64 value) { }
savic_ghcb_msr_read(u32 reg)645 static inline u64 savic_ghcb_msr_read(u32 reg) { return 0; }
646
647 #endif /* CONFIG_AMD_MEM_ENCRYPT */
648
649 #ifdef CONFIG_KVM_AMD_SEV
650 bool snp_probe_rmptable_info(void);
651 int snp_rmptable_init(void);
652 int snp_lookup_rmpentry(u64 pfn, bool *assigned, int *level);
653 void snp_dump_hva_rmpentry(unsigned long address);
654 int psmash(u64 pfn);
655 int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, u32 asid, bool immutable);
656 int rmp_make_shared(u64 pfn, enum pg_level level);
657 void __snp_leak_pages(u64 pfn, unsigned int npages, bool dump_rmp);
658 void kdump_sev_callback(void);
659 void snp_fixup_e820_tables(void);
snp_leak_pages(u64 pfn,unsigned int pages)660 static inline void snp_leak_pages(u64 pfn, unsigned int pages)
661 {
662 __snp_leak_pages(pfn, pages, true);
663 }
664 #else
snp_probe_rmptable_info(void)665 static inline bool snp_probe_rmptable_info(void) { return false; }
snp_rmptable_init(void)666 static inline int snp_rmptable_init(void) { return -ENOSYS; }
snp_lookup_rmpentry(u64 pfn,bool * assigned,int * level)667 static inline int snp_lookup_rmpentry(u64 pfn, bool *assigned, int *level) { return -ENODEV; }
snp_dump_hva_rmpentry(unsigned long address)668 static inline void snp_dump_hva_rmpentry(unsigned long address) {}
psmash(u64 pfn)669 static inline int psmash(u64 pfn) { return -ENODEV; }
rmp_make_private(u64 pfn,u64 gpa,enum pg_level level,u32 asid,bool immutable)670 static inline int rmp_make_private(u64 pfn, u64 gpa, enum pg_level level, u32 asid,
671 bool immutable)
672 {
673 return -ENODEV;
674 }
rmp_make_shared(u64 pfn,enum pg_level level)675 static inline int rmp_make_shared(u64 pfn, enum pg_level level) { return -ENODEV; }
__snp_leak_pages(u64 pfn,unsigned int npages,bool dump_rmp)676 static inline void __snp_leak_pages(u64 pfn, unsigned int npages, bool dump_rmp) {}
snp_leak_pages(u64 pfn,unsigned int npages)677 static inline void snp_leak_pages(u64 pfn, unsigned int npages) {}
kdump_sev_callback(void)678 static inline void kdump_sev_callback(void) { }
snp_fixup_e820_tables(void)679 static inline void snp_fixup_e820_tables(void) {}
680 #endif
681
682 #endif
683