1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Ultravisor Interfaces 4 * 5 * Copyright IBM Corp. 2019, 2022 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/gmap.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_NEED_DESTROY 0x8000 32 33 #define UVC_CMD_QUI 0x0001 34 #define UVC_CMD_INIT_UV 0x000f 35 #define UVC_CMD_CREATE_SEC_CONF 0x0100 36 #define UVC_CMD_DESTROY_SEC_CONF 0x0101 37 #define UVC_CMD_DESTROY_SEC_CONF_FAST 0x0102 38 #define UVC_CMD_CREATE_SEC_CPU 0x0120 39 #define UVC_CMD_DESTROY_SEC_CPU 0x0121 40 #define UVC_CMD_CONV_TO_SEC_STOR 0x0200 41 #define UVC_CMD_CONV_FROM_SEC_STOR 0x0201 42 #define UVC_CMD_DESTR_SEC_STOR 0x0202 43 #define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300 44 #define UVC_CMD_UNPACK_IMG 0x0301 45 #define UVC_CMD_VERIFY_IMG 0x0302 46 #define UVC_CMD_CPU_RESET 0x0310 47 #define UVC_CMD_CPU_RESET_INITIAL 0x0311 48 #define UVC_CMD_PREPARE_RESET 0x0320 49 #define UVC_CMD_CPU_RESET_CLEAR 0x0321 50 #define UVC_CMD_CPU_SET_STATE 0x0330 51 #define UVC_CMD_SET_UNSHARE_ALL 0x0340 52 #define UVC_CMD_PIN_PAGE_SHARED 0x0341 53 #define UVC_CMD_UNPIN_PAGE_SHARED 0x0342 54 #define UVC_CMD_DUMP_INIT 0x0400 55 #define UVC_CMD_DUMP_CONF_STOR_STATE 0x0401 56 #define UVC_CMD_DUMP_CPU 0x0402 57 #define UVC_CMD_DUMP_COMPLETE 0x0403 58 #define UVC_CMD_SET_SHARED_ACCESS 0x1000 59 #define UVC_CMD_REMOVE_SHARED_ACCESS 0x1001 60 #define UVC_CMD_RETR_ATTEST 0x1020 61 62 /* Bits in installed uv calls */ 63 enum uv_cmds_inst { 64 BIT_UVC_CMD_QUI = 0, 65 BIT_UVC_CMD_INIT_UV = 1, 66 BIT_UVC_CMD_CREATE_SEC_CONF = 2, 67 BIT_UVC_CMD_DESTROY_SEC_CONF = 3, 68 BIT_UVC_CMD_CREATE_SEC_CPU = 4, 69 BIT_UVC_CMD_DESTROY_SEC_CPU = 5, 70 BIT_UVC_CMD_CONV_TO_SEC_STOR = 6, 71 BIT_UVC_CMD_CONV_FROM_SEC_STOR = 7, 72 BIT_UVC_CMD_SET_SHARED_ACCESS = 8, 73 BIT_UVC_CMD_REMOVE_SHARED_ACCESS = 9, 74 BIT_UVC_CMD_SET_SEC_PARMS = 11, 75 BIT_UVC_CMD_UNPACK_IMG = 13, 76 BIT_UVC_CMD_VERIFY_IMG = 14, 77 BIT_UVC_CMD_CPU_RESET = 15, 78 BIT_UVC_CMD_CPU_RESET_INITIAL = 16, 79 BIT_UVC_CMD_CPU_SET_STATE = 17, 80 BIT_UVC_CMD_PREPARE_RESET = 18, 81 BIT_UVC_CMD_CPU_PERFORM_CLEAR_RESET = 19, 82 BIT_UVC_CMD_UNSHARE_ALL = 20, 83 BIT_UVC_CMD_PIN_PAGE_SHARED = 21, 84 BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22, 85 BIT_UVC_CMD_DESTROY_SEC_CONF_FAST = 23, 86 BIT_UVC_CMD_DUMP_INIT = 24, 87 BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE = 25, 88 BIT_UVC_CMD_DUMP_CPU = 26, 89 BIT_UVC_CMD_DUMP_COMPLETE = 27, 90 BIT_UVC_CMD_RETR_ATTEST = 28, 91 }; 92 93 enum uv_feat_ind { 94 BIT_UV_FEAT_MISC = 0, 95 BIT_UV_FEAT_AIV = 1, 96 }; 97 98 struct uv_cb_header { 99 u16 len; 100 u16 cmd; /* Command Code */ 101 u16 rc; /* Response Code */ 102 u16 rrc; /* Return Reason Code */ 103 } __packed __aligned(8); 104 105 /* Query Ultravisor Information */ 106 struct uv_cb_qui { 107 struct uv_cb_header header; /* 0x0000 */ 108 u64 reserved08; /* 0x0008 */ 109 u64 inst_calls_list[4]; /* 0x0010 */ 110 u64 reserved30[2]; /* 0x0030 */ 111 u64 uv_base_stor_len; /* 0x0040 */ 112 u64 reserved48; /* 0x0048 */ 113 u64 conf_base_phys_stor_len; /* 0x0050 */ 114 u64 conf_base_virt_stor_len; /* 0x0058 */ 115 u64 conf_virt_var_stor_len; /* 0x0060 */ 116 u64 cpu_stor_len; /* 0x0068 */ 117 u32 reserved70[3]; /* 0x0070 */ 118 u32 max_num_sec_conf; /* 0x007c */ 119 u64 max_guest_stor_addr; /* 0x0080 */ 120 u8 reserved88[158 - 136]; /* 0x0088 */ 121 u16 max_guest_cpu_id; /* 0x009e */ 122 u64 uv_feature_indications; /* 0x00a0 */ 123 u64 reserveda8; /* 0x00a8 */ 124 u64 supp_se_hdr_versions; /* 0x00b0 */ 125 u64 supp_se_hdr_pcf; /* 0x00b8 */ 126 u64 reservedc0; /* 0x00c0 */ 127 u64 conf_dump_storage_state_len; /* 0x00c8 */ 128 u64 conf_dump_finalize_len; /* 0x00d0 */ 129 u64 reservedd8; /* 0x00d8 */ 130 u64 supp_att_req_hdr_ver; /* 0x00e0 */ 131 u64 supp_att_pflags; /* 0x00e8 */ 132 u8 reservedf0[256 - 240]; /* 0x00f0 */ 133 } __packed __aligned(8); 134 135 /* Initialize Ultravisor */ 136 struct uv_cb_init { 137 struct uv_cb_header header; 138 u64 reserved08[2]; 139 u64 stor_origin; 140 u64 stor_len; 141 u64 reserved28[4]; 142 } __packed __aligned(8); 143 144 /* Create Guest Configuration */ 145 struct uv_cb_cgc { 146 struct uv_cb_header header; 147 u64 reserved08[2]; 148 u64 guest_handle; 149 u64 conf_base_stor_origin; 150 u64 conf_virt_stor_origin; 151 u64 reserved30; 152 u64 guest_stor_origin; 153 u64 guest_stor_len; 154 u64 guest_sca; 155 u64 guest_asce; 156 u64 reserved58[5]; 157 } __packed __aligned(8); 158 159 /* Create Secure CPU */ 160 struct uv_cb_csc { 161 struct uv_cb_header header; 162 u64 reserved08[2]; 163 u64 cpu_handle; 164 u64 guest_handle; 165 u64 stor_origin; 166 u8 reserved30[6]; 167 u16 num; 168 u64 state_origin; 169 u64 reserved40[4]; 170 } __packed __aligned(8); 171 172 /* Convert to Secure */ 173 struct uv_cb_cts { 174 struct uv_cb_header header; 175 u64 reserved08[2]; 176 u64 guest_handle; 177 u64 gaddr; 178 } __packed __aligned(8); 179 180 /* Convert from Secure / Pin Page Shared */ 181 struct uv_cb_cfs { 182 struct uv_cb_header header; 183 u64 reserved08[2]; 184 u64 paddr; 185 } __packed __aligned(8); 186 187 /* Set Secure Config Parameter */ 188 struct uv_cb_ssc { 189 struct uv_cb_header header; 190 u64 reserved08[2]; 191 u64 guest_handle; 192 u64 sec_header_origin; 193 u32 sec_header_len; 194 u32 reserved2c; 195 u64 reserved30[4]; 196 } __packed __aligned(8); 197 198 /* Unpack */ 199 struct uv_cb_unp { 200 struct uv_cb_header header; 201 u64 reserved08[2]; 202 u64 guest_handle; 203 u64 gaddr; 204 u64 tweak[2]; 205 u64 reserved38[3]; 206 } __packed __aligned(8); 207 208 #define PV_CPU_STATE_OPR 1 209 #define PV_CPU_STATE_STP 2 210 #define PV_CPU_STATE_CHKSTP 3 211 #define PV_CPU_STATE_OPR_LOAD 5 212 213 struct uv_cb_cpu_set_state { 214 struct uv_cb_header header; 215 u64 reserved08[2]; 216 u64 cpu_handle; 217 u8 reserved20[7]; 218 u8 state; 219 u64 reserved28[5]; 220 }; 221 222 /* 223 * A common UV call struct for calls that take no payload 224 * Examples: 225 * Destroy cpu/config 226 * Verify 227 */ 228 struct uv_cb_nodata { 229 struct uv_cb_header header; 230 u64 reserved08[2]; 231 u64 handle; 232 u64 reserved20[4]; 233 } __packed __aligned(8); 234 235 /* Destroy Configuration Fast */ 236 struct uv_cb_destroy_fast { 237 struct uv_cb_header header; 238 u64 reserved08[2]; 239 u64 handle; 240 u64 reserved20[5]; 241 } __packed __aligned(8); 242 243 /* Set Shared Access */ 244 struct uv_cb_share { 245 struct uv_cb_header header; 246 u64 reserved08[3]; 247 u64 paddr; 248 u64 reserved28; 249 } __packed __aligned(8); 250 251 /* Retrieve Attestation Measurement */ 252 struct uv_cb_attest { 253 struct uv_cb_header header; /* 0x0000 */ 254 u64 reserved08[2]; /* 0x0008 */ 255 u64 arcb_addr; /* 0x0018 */ 256 u64 cont_token; /* 0x0020 */ 257 u8 reserved28[6]; /* 0x0028 */ 258 u16 user_data_len; /* 0x002e */ 259 u8 user_data[256]; /* 0x0030 */ 260 u32 reserved130[3]; /* 0x0130 */ 261 u32 meas_len; /* 0x013c */ 262 u64 meas_addr; /* 0x0140 */ 263 u8 config_uid[16]; /* 0x0148 */ 264 u32 reserved158; /* 0x0158 */ 265 u32 add_data_len; /* 0x015c */ 266 u64 add_data_addr; /* 0x0160 */ 267 u64 reserved168[4]; /* 0x0168 */ 268 } __packed __aligned(8); 269 270 struct uv_cb_dump_cpu { 271 struct uv_cb_header header; 272 u64 reserved08[2]; 273 u64 cpu_handle; 274 u64 dump_area_origin; 275 u64 reserved28[5]; 276 } __packed __aligned(8); 277 278 struct uv_cb_dump_stor_state { 279 struct uv_cb_header header; 280 u64 reserved08[2]; 281 u64 config_handle; 282 u64 dump_area_origin; 283 u64 gaddr; 284 u64 reserved28[4]; 285 } __packed __aligned(8); 286 287 struct uv_cb_dump_complete { 288 struct uv_cb_header header; 289 u64 reserved08[2]; 290 u64 config_handle; 291 u64 dump_area_origin; 292 u64 reserved30[5]; 293 } __packed __aligned(8); 294 295 static inline int __uv_call(unsigned long r1, unsigned long r2) 296 { 297 int cc; 298 299 asm volatile( 300 " .insn rrf,0xB9A40000,%[r1],%[r2],0,0\n" 301 " ipm %[cc]\n" 302 " srl %[cc],28\n" 303 : [cc] "=d" (cc) 304 : [r1] "a" (r1), [r2] "a" (r2) 305 : "memory", "cc"); 306 return cc; 307 } 308 309 static inline int uv_call(unsigned long r1, unsigned long r2) 310 { 311 int cc; 312 313 do { 314 cc = __uv_call(r1, r2); 315 } while (cc > 1); 316 return cc; 317 } 318 319 /* Low level uv_call that avoids stalls for long running busy conditions */ 320 static inline int uv_call_sched(unsigned long r1, unsigned long r2) 321 { 322 int cc; 323 324 do { 325 cc = __uv_call(r1, r2); 326 cond_resched(); 327 } while (cc > 1); 328 return cc; 329 } 330 331 /* 332 * special variant of uv_call that only transports the cpu or guest 333 * handle and the command, like destroy or verify. 334 */ 335 static inline int uv_cmd_nodata(u64 handle, u16 cmd, u16 *rc, u16 *rrc) 336 { 337 struct uv_cb_nodata uvcb = { 338 .header.cmd = cmd, 339 .header.len = sizeof(uvcb), 340 .handle = handle, 341 }; 342 int cc; 343 344 WARN(!handle, "No handle provided to Ultravisor call cmd %x\n", cmd); 345 cc = uv_call_sched(0, (u64)&uvcb); 346 *rc = uvcb.header.rc; 347 *rrc = uvcb.header.rrc; 348 return cc ? -EINVAL : 0; 349 } 350 351 struct uv_info { 352 unsigned long inst_calls_list[4]; 353 unsigned long uv_base_stor_len; 354 unsigned long guest_base_stor_len; 355 unsigned long guest_virt_base_stor_len; 356 unsigned long guest_virt_var_stor_len; 357 unsigned long guest_cpu_stor_len; 358 unsigned long max_sec_stor_addr; 359 unsigned int max_num_sec_conf; 360 unsigned short max_guest_cpu_id; 361 unsigned long uv_feature_indications; 362 unsigned long supp_se_hdr_ver; 363 unsigned long supp_se_hdr_pcf; 364 unsigned long conf_dump_storage_state_len; 365 unsigned long conf_dump_finalize_len; 366 unsigned long supp_att_req_hdr_ver; 367 unsigned long supp_att_pflags; 368 }; 369 370 extern struct uv_info uv_info; 371 372 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST 373 extern int prot_virt_guest; 374 375 static inline int is_prot_virt_guest(void) 376 { 377 return prot_virt_guest; 378 } 379 380 static inline int share(unsigned long addr, u16 cmd) 381 { 382 struct uv_cb_share uvcb = { 383 .header.cmd = cmd, 384 .header.len = sizeof(uvcb), 385 .paddr = addr 386 }; 387 388 if (!is_prot_virt_guest()) 389 return -EOPNOTSUPP; 390 /* 391 * Sharing is page wise, if we encounter addresses that are 392 * not page aligned, we assume something went wrong. If 393 * malloced structs are passed to this function, we could leak 394 * data to the hypervisor. 395 */ 396 BUG_ON(addr & ~PAGE_MASK); 397 398 if (!uv_call(0, (u64)&uvcb)) 399 return 0; 400 return -EINVAL; 401 } 402 403 /* 404 * Guest 2 request to the Ultravisor to make a page shared with the 405 * hypervisor for IO. 406 * 407 * @addr: Real or absolute address of the page to be shared 408 */ 409 static inline int uv_set_shared(unsigned long addr) 410 { 411 return share(addr, UVC_CMD_SET_SHARED_ACCESS); 412 } 413 414 /* 415 * Guest 2 request to the Ultravisor to make a page unshared. 416 * 417 * @addr: Real or absolute address of the page to be unshared 418 */ 419 static inline int uv_remove_shared(unsigned long addr) 420 { 421 return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS); 422 } 423 424 #else 425 #define is_prot_virt_guest() 0 426 static inline int uv_set_shared(unsigned long addr) { return 0; } 427 static inline int uv_remove_shared(unsigned long addr) { return 0; } 428 #endif 429 430 #if IS_ENABLED(CONFIG_KVM) 431 extern int prot_virt_host; 432 433 static inline int is_prot_virt_host(void) 434 { 435 return prot_virt_host; 436 } 437 438 int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb); 439 int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr); 440 int uv_destroy_owned_page(unsigned long paddr); 441 int uv_convert_from_secure(unsigned long paddr); 442 int uv_convert_owned_from_secure(unsigned long paddr); 443 int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr); 444 445 void setup_uv(void); 446 #else 447 #define is_prot_virt_host() 0 448 static inline void setup_uv(void) {} 449 450 static inline int uv_destroy_owned_page(unsigned long paddr) 451 { 452 return 0; 453 } 454 455 static inline int uv_convert_from_secure(unsigned long paddr) 456 { 457 return 0; 458 } 459 460 static inline int uv_convert_owned_from_secure(unsigned long paddr) 461 { 462 return 0; 463 } 464 #endif 465 466 #endif /* _ASM_S390_UV_H */ 467