1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Ultravisor Interfaces
4 *
5 * Copyright IBM Corp. 2019, 2024
6 *
7 * Author(s):
8 * Vasily Gorbik <gor@linux.ibm.com>
9 * Janosch Frank <frankja@linux.ibm.com>
10 */
11 #ifndef _ASM_S390_UV_H
12 #define _ASM_S390_UV_H
13
14 #include <linux/types.h>
15 #include <linux/errno.h>
16 #include <linux/bug.h>
17 #include <linux/sched.h>
18 #include <asm/page.h>
19 #include <asm/asm.h>
20
21 #define UVC_CC_OK 0
22 #define UVC_CC_ERROR 1
23 #define UVC_CC_BUSY 2
24 #define UVC_CC_PARTIAL 3
25
26 #define UVC_RC_EXECUTED 0x0001
27 #define UVC_RC_INV_CMD 0x0002
28 #define UVC_RC_INV_STATE 0x0003
29 #define UVC_RC_INV_LEN 0x0005
30 #define UVC_RC_NO_RESUME 0x0007
31 #define UVC_RC_MORE_DATA 0x0100
32 #define UVC_RC_NEED_DESTROY 0x8000
33
34 #define UVC_CMD_QUI 0x0001
35 #define UVC_CMD_QUERY_KEYS 0x0002
36 #define UVC_CMD_INIT_UV 0x000f
37 #define UVC_CMD_CREATE_SEC_CONF 0x0100
38 #define UVC_CMD_DESTROY_SEC_CONF 0x0101
39 #define UVC_CMD_DESTROY_SEC_CONF_FAST 0x0102
40 #define UVC_CMD_CREATE_SEC_CPU 0x0120
41 #define UVC_CMD_DESTROY_SEC_CPU 0x0121
42 #define UVC_CMD_CONV_TO_SEC_STOR 0x0200
43 #define UVC_CMD_CONV_FROM_SEC_STOR 0x0201
44 #define UVC_CMD_DESTR_SEC_STOR 0x0202
45 #define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
46 #define UVC_CMD_UNPACK_IMG 0x0301
47 #define UVC_CMD_VERIFY_IMG 0x0302
48 #define UVC_CMD_CPU_RESET 0x0310
49 #define UVC_CMD_CPU_RESET_INITIAL 0x0311
50 #define UVC_CMD_PREPARE_RESET 0x0320
51 #define UVC_CMD_CPU_RESET_CLEAR 0x0321
52 #define UVC_CMD_CPU_SET_STATE 0x0330
53 #define UVC_CMD_SET_UNSHARE_ALL 0x0340
54 #define UVC_CMD_PIN_PAGE_SHARED 0x0341
55 #define UVC_CMD_UNPIN_PAGE_SHARED 0x0342
56 #define UVC_CMD_DUMP_INIT 0x0400
57 #define UVC_CMD_DUMP_CONF_STOR_STATE 0x0401
58 #define UVC_CMD_DUMP_CPU 0x0402
59 #define UVC_CMD_DUMP_COMPLETE 0x0403
60 #define UVC_CMD_SET_SHARED_ACCESS 0x1000
61 #define UVC_CMD_REMOVE_SHARED_ACCESS 0x1001
62 #define UVC_CMD_RETR_ATTEST 0x1020
63 #define UVC_CMD_ADD_SECRET 0x1031
64 #define UVC_CMD_LIST_SECRETS 0x1033
65 #define UVC_CMD_LOCK_SECRETS 0x1034
66 #define UVC_CMD_RETR_SECRET 0x1035
67
68 /* Bits in installed uv calls */
69 enum uv_cmds_inst {
70 BIT_UVC_CMD_QUI = 0,
71 BIT_UVC_CMD_INIT_UV = 1,
72 BIT_UVC_CMD_CREATE_SEC_CONF = 2,
73 BIT_UVC_CMD_DESTROY_SEC_CONF = 3,
74 BIT_UVC_CMD_CREATE_SEC_CPU = 4,
75 BIT_UVC_CMD_DESTROY_SEC_CPU = 5,
76 BIT_UVC_CMD_CONV_TO_SEC_STOR = 6,
77 BIT_UVC_CMD_CONV_FROM_SEC_STOR = 7,
78 BIT_UVC_CMD_SET_SHARED_ACCESS = 8,
79 BIT_UVC_CMD_REMOVE_SHARED_ACCESS = 9,
80 BIT_UVC_CMD_SET_SEC_PARMS = 11,
81 BIT_UVC_CMD_UNPACK_IMG = 13,
82 BIT_UVC_CMD_VERIFY_IMG = 14,
83 BIT_UVC_CMD_CPU_RESET = 15,
84 BIT_UVC_CMD_CPU_RESET_INITIAL = 16,
85 BIT_UVC_CMD_CPU_SET_STATE = 17,
86 BIT_UVC_CMD_PREPARE_RESET = 18,
87 BIT_UVC_CMD_CPU_PERFORM_CLEAR_RESET = 19,
88 BIT_UVC_CMD_UNSHARE_ALL = 20,
89 BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
90 BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
91 BIT_UVC_CMD_DESTROY_SEC_CONF_FAST = 23,
92 BIT_UVC_CMD_DUMP_INIT = 24,
93 BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE = 25,
94 BIT_UVC_CMD_DUMP_CPU = 26,
95 BIT_UVC_CMD_DUMP_COMPLETE = 27,
96 BIT_UVC_CMD_RETR_ATTEST = 28,
97 BIT_UVC_CMD_ADD_SECRET = 29,
98 BIT_UVC_CMD_LIST_SECRETS = 30,
99 BIT_UVC_CMD_LOCK_SECRETS = 31,
100 BIT_UVC_CMD_RETR_SECRET = 33,
101 BIT_UVC_CMD_QUERY_KEYS = 34,
102 };
103
104 enum uv_feat_ind {
105 BIT_UV_FEAT_MISC = 0,
106 BIT_UV_FEAT_AIV = 1,
107 BIT_UV_FEAT_AP = 4,
108 BIT_UV_FEAT_AP_INTR = 5,
109 };
110
111 struct uv_cb_header {
112 u16 len;
113 u16 cmd; /* Command Code */
114 u16 rc; /* Response Code */
115 u16 rrc; /* Return Reason Code */
116 } __packed __aligned(8);
117
118 /* Query Ultravisor Information */
119 struct uv_cb_qui {
120 struct uv_cb_header header; /* 0x0000 */
121 u64 reserved08; /* 0x0008 */
122 u64 inst_calls_list[4]; /* 0x0010 */
123 u64 reserved30[2]; /* 0x0030 */
124 u64 uv_base_stor_len; /* 0x0040 */
125 u64 reserved48; /* 0x0048 */
126 u64 conf_base_phys_stor_len; /* 0x0050 */
127 u64 conf_base_virt_stor_len; /* 0x0058 */
128 u64 conf_virt_var_stor_len; /* 0x0060 */
129 u64 cpu_stor_len; /* 0x0068 */
130 u32 reserved70[3]; /* 0x0070 */
131 u32 max_num_sec_conf; /* 0x007c */
132 u64 max_guest_stor_addr; /* 0x0080 */
133 u8 reserved88[0x9e - 0x88]; /* 0x0088 */
134 u16 max_guest_cpu_id; /* 0x009e */
135 u64 uv_feature_indications; /* 0x00a0 */
136 u64 reserveda8; /* 0x00a8 */
137 u64 supp_se_hdr_versions; /* 0x00b0 */
138 u64 supp_se_hdr_pcf; /* 0x00b8 */
139 u64 reservedc0; /* 0x00c0 */
140 u64 conf_dump_storage_state_len; /* 0x00c8 */
141 u64 conf_dump_finalize_len; /* 0x00d0 */
142 u64 reservedd8; /* 0x00d8 */
143 u64 supp_att_req_hdr_ver; /* 0x00e0 */
144 u64 supp_att_pflags; /* 0x00e8 */
145 u64 reservedf0; /* 0x00f0 */
146 u64 supp_add_secret_req_ver; /* 0x00f8 */
147 u64 supp_add_secret_pcf; /* 0x0100 */
148 u64 supp_secret_types; /* 0x0108 */
149 u16 max_assoc_secrets; /* 0x0110 */
150 u16 max_retr_secrets; /* 0x0112 */
151 u8 reserved114[0x120 - 0x114]; /* 0x0114 */
152 } __packed __aligned(8);
153
154 struct uv_key_hash {
155 u64 dword[4];
156 } __packed __aligned(8);
157
158 #define UVC_QUERY_KEYS_IDX_HK 0
159 #define UVC_QUERY_KEYS_IDX_BACK_HK 1
160
161 /* Query Ultravisor Keys */
162 struct uv_cb_query_keys {
163 struct uv_cb_header header; /* 0x0000 */
164 u64 reserved08[3]; /* 0x0008 */
165 struct uv_key_hash key_hashes[15]; /* 0x0020 */
166 } __packed __aligned(8);
167 static_assert(sizeof(struct uv_cb_query_keys) == 0x200);
168
169 /* Initialize Ultravisor */
170 struct uv_cb_init {
171 struct uv_cb_header header;
172 u64 reserved08[2];
173 u64 stor_origin;
174 u64 stor_len;
175 u64 reserved28[4];
176 } __packed __aligned(8);
177
178 /* Create Guest Configuration */
179 struct uv_cb_cgc {
180 struct uv_cb_header header;
181 u64 reserved08[2];
182 u64 guest_handle;
183 u64 conf_base_stor_origin;
184 u64 conf_virt_stor_origin;
185 u8 reserved30[6];
186 union {
187 struct {
188 u16 : 14;
189 u16 ap_instr_intr : 1;
190 u16 ap_allow_instr : 1;
191 };
192 u16 raw;
193 } flags;
194 u64 guest_stor_origin;
195 u64 guest_stor_len;
196 u64 guest_sca;
197 u64 guest_asce;
198 u64 reserved58[5];
199 } __packed __aligned(8);
200
201 /* Create Secure CPU */
202 struct uv_cb_csc {
203 struct uv_cb_header header;
204 u64 reserved08[2];
205 u64 cpu_handle;
206 u64 guest_handle;
207 u64 stor_origin;
208 u8 reserved30[6];
209 u16 num;
210 u64 state_origin;
211 u64 reserved40[4];
212 } __packed __aligned(8);
213
214 /* Convert to Secure */
215 struct uv_cb_cts {
216 struct uv_cb_header header;
217 u64 reserved08[2];
218 u64 guest_handle;
219 u64 gaddr;
220 } __packed __aligned(8);
221
222 /* Convert from Secure / Pin Page Shared */
223 struct uv_cb_cfs {
224 struct uv_cb_header header;
225 u64 reserved08[2];
226 u64 paddr;
227 } __packed __aligned(8);
228
229 /* Set Secure Config Parameter */
230 struct uv_cb_ssc {
231 struct uv_cb_header header;
232 u64 reserved08[2];
233 u64 guest_handle;
234 u64 sec_header_origin;
235 u32 sec_header_len;
236 u32 reserved2c;
237 u64 reserved30[4];
238 } __packed __aligned(8);
239
240 /* Unpack */
241 struct uv_cb_unp {
242 struct uv_cb_header header;
243 u64 reserved08[2];
244 u64 guest_handle;
245 u64 gaddr;
246 u64 tweak[2];
247 u64 reserved38[3];
248 } __packed __aligned(8);
249
250 #define PV_CPU_STATE_OPR 1
251 #define PV_CPU_STATE_STP 2
252 #define PV_CPU_STATE_CHKSTP 3
253 #define PV_CPU_STATE_OPR_LOAD 5
254
255 struct uv_cb_cpu_set_state {
256 struct uv_cb_header header;
257 u64 reserved08[2];
258 u64 cpu_handle;
259 u8 reserved20[7];
260 u8 state;
261 u64 reserved28[5];
262 };
263
264 /*
265 * A common UV call struct for calls that take no payload
266 * Examples:
267 * Destroy cpu/config
268 * Verify
269 */
270 struct uv_cb_nodata {
271 struct uv_cb_header header;
272 u64 reserved08[2];
273 u64 handle;
274 u64 reserved20[4];
275 } __packed __aligned(8);
276
277 /* Destroy Configuration Fast */
278 struct uv_cb_destroy_fast {
279 struct uv_cb_header header;
280 u64 reserved08[2];
281 u64 handle;
282 u64 reserved20[5];
283 } __packed __aligned(8);
284
285 /* Set Shared Access */
286 struct uv_cb_share {
287 struct uv_cb_header header;
288 u64 reserved08[3];
289 u64 paddr;
290 u64 reserved28;
291 } __packed __aligned(8);
292
293 /* Retrieve Attestation Measurement */
294 struct uv_cb_attest {
295 struct uv_cb_header header; /* 0x0000 */
296 u64 reserved08[2]; /* 0x0008 */
297 u64 arcb_addr; /* 0x0018 */
298 u64 cont_token; /* 0x0020 */
299 u8 reserved28[6]; /* 0x0028 */
300 u16 user_data_len; /* 0x002e */
301 u8 user_data[256]; /* 0x0030 */
302 u32 reserved130[3]; /* 0x0130 */
303 u32 meas_len; /* 0x013c */
304 u64 meas_addr; /* 0x0140 */
305 u8 config_uid[16]; /* 0x0148 */
306 u32 reserved158; /* 0x0158 */
307 u32 add_data_len; /* 0x015c */
308 u64 add_data_addr; /* 0x0160 */
309 u64 reserved168[4]; /* 0x0168 */
310 } __packed __aligned(8);
311
312 struct uv_cb_dump_cpu {
313 struct uv_cb_header header;
314 u64 reserved08[2];
315 u64 cpu_handle;
316 u64 dump_area_origin;
317 u64 reserved28[5];
318 } __packed __aligned(8);
319
320 struct uv_cb_dump_stor_state {
321 struct uv_cb_header header;
322 u64 reserved08[2];
323 u64 config_handle;
324 u64 dump_area_origin;
325 u64 gaddr;
326 u64 reserved28[4];
327 } __packed __aligned(8);
328
329 struct uv_cb_dump_complete {
330 struct uv_cb_header header;
331 u64 reserved08[2];
332 u64 config_handle;
333 u64 dump_area_origin;
334 u64 reserved30[5];
335 } __packed __aligned(8);
336
337 /*
338 * A common UV call struct for pv guests that contains a single address
339 * Examples:
340 * Add Secret
341 */
342 struct uv_cb_guest_addr {
343 struct uv_cb_header header;
344 u64 reserved08[3];
345 u64 addr;
346 u64 reserved28[4];
347 } __packed __aligned(8);
348
349 #define UVC_RC_RETR_SECR_BUF_SMALL 0x0109
350 #define UVC_RC_RETR_SECR_STORE_EMPTY 0x010f
351 #define UVC_RC_RETR_SECR_INV_IDX 0x0110
352 #define UVC_RC_RETR_SECR_INV_SECRET 0x0111
353
354 struct uv_cb_retr_secr {
355 struct uv_cb_header header;
356 u64 reserved08[2];
357 u16 secret_idx;
358 u16 reserved1a;
359 u32 buf_size;
360 u64 buf_addr;
361 u64 reserved28[4];
362 } __packed __aligned(8);
363
364 struct uv_cb_list_secrets {
365 struct uv_cb_header header;
366 u64 reserved08[2];
367 u8 reserved18[6];
368 u16 start_idx;
369 u64 list_addr;
370 u64 reserved28[4];
371 } __packed __aligned(8);
372
373 enum uv_secret_types {
374 UV_SECRET_INVAL = 0x0,
375 UV_SECRET_NULL = 0x1,
376 UV_SECRET_ASSOCIATION = 0x2,
377 UV_SECRET_PLAIN = 0x3,
378 UV_SECRET_AES_128 = 0x4,
379 UV_SECRET_AES_192 = 0x5,
380 UV_SECRET_AES_256 = 0x6,
381 UV_SECRET_AES_XTS_128 = 0x7,
382 UV_SECRET_AES_XTS_256 = 0x8,
383 UV_SECRET_HMAC_SHA_256 = 0x9,
384 UV_SECRET_HMAC_SHA_512 = 0xa,
385 /* 0x0b - 0x10 reserved */
386 UV_SECRET_ECDSA_P256 = 0x11,
387 UV_SECRET_ECDSA_P384 = 0x12,
388 UV_SECRET_ECDSA_P521 = 0x13,
389 UV_SECRET_ECDSA_ED25519 = 0x14,
390 UV_SECRET_ECDSA_ED448 = 0x15,
391 };
392
393 /**
394 * uv_secret_list_item_hdr - UV secret metadata.
395 * @index: Index of the secret in the secret list.
396 * @type: Type of the secret. See `enum uv_secret_types`.
397 * @length: Length of the stored secret.
398 */
399 struct uv_secret_list_item_hdr {
400 u16 index;
401 u16 type;
402 u32 length;
403 } __packed __aligned(8);
404
405 #define UV_SECRET_ID_LEN 32
406 /**
407 * uv_secret_list_item - UV secret entry.
408 * @hdr: The metadata of this secret.
409 * @id: The ID of this secret, not the secret itself.
410 */
411 struct uv_secret_list_item {
412 struct uv_secret_list_item_hdr hdr;
413 u64 reserverd08;
414 u8 id[UV_SECRET_ID_LEN];
415 } __packed __aligned(8);
416
417 /**
418 * uv_secret_list - UV secret-metadata list.
419 * @num_secr_stored: Number of secrets stored in this list.
420 * @total_num_secrets: Number of secrets stored in the UV for this guest.
421 * @next_secret_idx: positive number if there are more secrets available or zero.
422 * @secrets: Up to 85 UV-secret metadata entries.
423 */
424 struct uv_secret_list {
425 u16 num_secr_stored;
426 u16 total_num_secrets;
427 u16 next_secret_idx;
428 u16 reserved_06;
429 u64 reserved_08;
430 struct uv_secret_list_item secrets[85];
431 } __packed __aligned(8);
432 static_assert(sizeof(struct uv_secret_list) == PAGE_SIZE);
433
__uv_call(unsigned long r1,unsigned long r2)434 static inline int __uv_call(unsigned long r1, unsigned long r2)
435 {
436 int cc;
437
438 asm volatile(
439 " .insn rrf,0xb9a40000,%[r1],%[r2],0,0\n"
440 CC_IPM(cc)
441 : CC_OUT(cc, cc)
442 : [r1] "a" (r1), [r2] "a" (r2)
443 : CC_CLOBBER_LIST("memory"));
444 return CC_TRANSFORM(cc);
445 }
446
uv_call(unsigned long r1,unsigned long r2)447 static inline int uv_call(unsigned long r1, unsigned long r2)
448 {
449 int cc;
450
451 do {
452 cc = __uv_call(r1, r2);
453 } while (cc > 1);
454 return cc;
455 }
456
457 /* Low level uv_call that avoids stalls for long running busy conditions */
uv_call_sched(unsigned long r1,unsigned long r2)458 static inline int uv_call_sched(unsigned long r1, unsigned long r2)
459 {
460 int cc;
461
462 do {
463 cc = __uv_call(r1, r2);
464 cond_resched();
465 } while (cc > 1);
466 return cc;
467 }
468
469 /*
470 * special variant of uv_call that only transports the cpu or guest
471 * handle and the command, like destroy or verify.
472 */
uv_cmd_nodata(u64 handle,u16 cmd,u16 * rc,u16 * rrc)473 static inline int uv_cmd_nodata(u64 handle, u16 cmd, u16 *rc, u16 *rrc)
474 {
475 struct uv_cb_nodata uvcb = {
476 .header.cmd = cmd,
477 .header.len = sizeof(uvcb),
478 .handle = handle,
479 };
480 int cc;
481
482 WARN(!handle, "No handle provided to Ultravisor call cmd %x\n", cmd);
483 cc = uv_call_sched(0, (u64)&uvcb);
484 *rc = uvcb.header.rc;
485 *rrc = uvcb.header.rrc;
486 return cc ? -EINVAL : 0;
487 }
488
489 /**
490 * uv_list_secrets() - Do a List Secrets UVC.
491 *
492 * @buf: Buffer to write list into; size of one page.
493 * @start_idx: The smallest index that should be included in the list.
494 * For the fist invocation use 0.
495 * @rc: Pointer to store the return code or NULL.
496 * @rrc: Pointer to store the return reason code or NULL.
497 *
498 * This function calls the List Secrets UVC. The result is written into `buf`,
499 * that needs to be at least one page of writable memory.
500 * `buf` consists of:
501 * * %struct uv_secret_list_hdr
502 * * %struct uv_secret_list_item (multiple)
503 *
504 * For `start_idx` use _0_ for the first call. If there are more secrets available
505 * but could not fit into the page then `rc` is `UVC_RC_MORE_DATA`.
506 * In this case use `uv_secret_list_hdr.next_secret_idx` for `start_idx`.
507 *
508 * Context: might sleep.
509 *
510 * Return: The UVC condition code.
511 */
uv_list_secrets(struct uv_secret_list * buf,u16 start_idx,u16 * rc,u16 * rrc)512 static inline int uv_list_secrets(struct uv_secret_list *buf, u16 start_idx,
513 u16 *rc, u16 *rrc)
514 {
515 struct uv_cb_list_secrets uvcb = {
516 .header.len = sizeof(uvcb),
517 .header.cmd = UVC_CMD_LIST_SECRETS,
518 .start_idx = start_idx,
519 .list_addr = (u64)buf,
520 };
521 int cc = uv_call_sched(0, (u64)&uvcb);
522
523 if (rc)
524 *rc = uvcb.header.rc;
525 if (rrc)
526 *rrc = uvcb.header.rrc;
527
528 return cc;
529 }
530
531 struct uv_info {
532 unsigned long inst_calls_list[4];
533 unsigned long uv_base_stor_len;
534 unsigned long guest_base_stor_len;
535 unsigned long guest_virt_base_stor_len;
536 unsigned long guest_virt_var_stor_len;
537 unsigned long guest_cpu_stor_len;
538 unsigned long max_sec_stor_addr;
539 unsigned int max_num_sec_conf;
540 unsigned short max_guest_cpu_id;
541 unsigned long uv_feature_indications;
542 unsigned long supp_se_hdr_ver;
543 unsigned long supp_se_hdr_pcf;
544 unsigned long conf_dump_storage_state_len;
545 unsigned long conf_dump_finalize_len;
546 unsigned long supp_att_req_hdr_ver;
547 unsigned long supp_att_pflags;
548 unsigned long supp_add_secret_req_ver;
549 unsigned long supp_add_secret_pcf;
550 unsigned long supp_secret_types;
551 unsigned short max_assoc_secrets;
552 unsigned short max_retr_secrets;
553 };
554
555 extern struct uv_info uv_info;
556
uv_has_feature(u8 feature_bit)557 static inline bool uv_has_feature(u8 feature_bit)
558 {
559 if (feature_bit >= sizeof(uv_info.uv_feature_indications) * 8)
560 return false;
561 return test_bit_inv(feature_bit, &uv_info.uv_feature_indications);
562 }
563
564 extern int prot_virt_guest;
565
is_prot_virt_guest(void)566 static inline int is_prot_virt_guest(void)
567 {
568 return prot_virt_guest;
569 }
570
share(unsigned long addr,u16 cmd)571 static inline int share(unsigned long addr, u16 cmd)
572 {
573 struct uv_cb_share uvcb = {
574 .header.cmd = cmd,
575 .header.len = sizeof(uvcb),
576 .paddr = addr
577 };
578
579 if (!is_prot_virt_guest())
580 return -EOPNOTSUPP;
581 /*
582 * Sharing is page wise, if we encounter addresses that are
583 * not page aligned, we assume something went wrong. If
584 * malloced structs are passed to this function, we could leak
585 * data to the hypervisor.
586 */
587 BUG_ON(addr & ~PAGE_MASK);
588
589 if (!uv_call(0, (u64)&uvcb))
590 return 0;
591 pr_err("%s UVC failed (rc: 0x%x, rrc: 0x%x), possible hypervisor bug.\n",
592 uvcb.header.cmd == UVC_CMD_SET_SHARED_ACCESS ? "Share" : "Unshare",
593 uvcb.header.rc, uvcb.header.rrc);
594 panic("System security cannot be guaranteed unless the system panics now.\n");
595 }
596
597 /*
598 * Guest 2 request to the Ultravisor to make a page shared with the
599 * hypervisor for IO.
600 *
601 * @addr: Real or absolute address of the page to be shared
602 */
uv_set_shared(unsigned long addr)603 static inline int uv_set_shared(unsigned long addr)
604 {
605 return share(addr, UVC_CMD_SET_SHARED_ACCESS);
606 }
607
608 /*
609 * Guest 2 request to the Ultravisor to make a page unshared.
610 *
611 * @addr: Real or absolute address of the page to be unshared
612 */
uv_remove_shared(unsigned long addr)613 static inline int uv_remove_shared(unsigned long addr)
614 {
615 return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS);
616 }
617
618 int uv_find_secret(const u8 secret_id[UV_SECRET_ID_LEN],
619 struct uv_secret_list *list,
620 struct uv_secret_list_item_hdr *secret);
621 int uv_retrieve_secret(u16 secret_idx, u8 *buf, size_t buf_size);
622
623 extern int prot_virt_host;
624
is_prot_virt_host(void)625 static inline int is_prot_virt_host(void)
626 {
627 return prot_virt_host;
628 }
629
630 int uv_pin_shared(unsigned long paddr);
631 int uv_destroy_folio(struct folio *folio);
632 int uv_destroy_pte(pte_t pte);
633 int uv_convert_from_secure_pte(pte_t pte);
634 int make_hva_secure(struct mm_struct *mm, unsigned long hva, struct uv_cb_header *uvcb);
635 int uv_convert_from_secure(unsigned long paddr);
636 int uv_convert_from_secure_folio(struct folio *folio);
637
638 void setup_uv(void);
639
640 #endif /* _ASM_S390_UV_H */
641