1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2015, Linaro Limited 4 */ 5 #ifndef __LINUX_ARM_SMCCC_H 6 #define __LINUX_ARM_SMCCC_H 7 8 #include <linux/args.h> 9 #include <linux/init.h> 10 #include <uapi/linux/const.h> 11 12 /* 13 * This file provides common defines for ARM SMC Calling Convention as 14 * specified in 15 * https://developer.arm.com/docs/den0028/latest 16 * 17 * This code is up-to-date with version DEN 0028 C 18 */ 19 20 #define ARM_SMCCC_STD_CALL _AC(0,U) 21 #define ARM_SMCCC_FAST_CALL _AC(1,U) 22 #define ARM_SMCCC_TYPE_SHIFT 31 23 24 #define ARM_SMCCC_SMC_32 0 25 #define ARM_SMCCC_SMC_64 1 26 #define ARM_SMCCC_CALL_CONV_SHIFT 30 27 28 #define ARM_SMCCC_OWNER_MASK 0x3F 29 #define ARM_SMCCC_OWNER_SHIFT 24 30 31 #define ARM_SMCCC_FUNC_MASK 0xFFFF 32 33 #define ARM_SMCCC_IS_FAST_CALL(smc_val) \ 34 ((smc_val) & (ARM_SMCCC_FAST_CALL << ARM_SMCCC_TYPE_SHIFT)) 35 #define ARM_SMCCC_IS_64(smc_val) \ 36 ((smc_val) & (ARM_SMCCC_SMC_64 << ARM_SMCCC_CALL_CONV_SHIFT)) 37 #define ARM_SMCCC_FUNC_NUM(smc_val) ((smc_val) & ARM_SMCCC_FUNC_MASK) 38 #define ARM_SMCCC_OWNER_NUM(smc_val) \ 39 (((smc_val) >> ARM_SMCCC_OWNER_SHIFT) & ARM_SMCCC_OWNER_MASK) 40 41 #define ARM_SMCCC_CALL_VAL(type, calling_convention, owner, func_num) \ 42 (((type) << ARM_SMCCC_TYPE_SHIFT) | \ 43 ((calling_convention) << ARM_SMCCC_CALL_CONV_SHIFT) | \ 44 (((owner) & ARM_SMCCC_OWNER_MASK) << ARM_SMCCC_OWNER_SHIFT) | \ 45 ((func_num) & ARM_SMCCC_FUNC_MASK)) 46 47 #define ARM_SMCCC_OWNER_ARCH 0 48 #define ARM_SMCCC_OWNER_CPU 1 49 #define ARM_SMCCC_OWNER_SIP 2 50 #define ARM_SMCCC_OWNER_OEM 3 51 #define ARM_SMCCC_OWNER_STANDARD 4 52 #define ARM_SMCCC_OWNER_STANDARD_HYP 5 53 #define ARM_SMCCC_OWNER_VENDOR_HYP 6 54 #define ARM_SMCCC_OWNER_TRUSTED_APP 48 55 #define ARM_SMCCC_OWNER_TRUSTED_APP_END 49 56 #define ARM_SMCCC_OWNER_TRUSTED_OS 50 57 #define ARM_SMCCC_OWNER_TRUSTED_OS_END 63 58 59 #define ARM_SMCCC_FUNC_QUERY_CALL_UID 0xff01 60 61 #define ARM_SMCCC_QUIRK_NONE 0 62 #define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */ 63 64 #define ARM_SMCCC_VERSION_1_0 0x10000 65 #define ARM_SMCCC_VERSION_1_1 0x10001 66 #define ARM_SMCCC_VERSION_1_2 0x10002 67 #define ARM_SMCCC_VERSION_1_3 0x10003 68 69 #define ARM_SMCCC_1_3_SVE_HINT 0x10000 70 #define ARM_SMCCC_CALL_HINTS ARM_SMCCC_1_3_SVE_HINT 71 72 73 #define ARM_SMCCC_VERSION_FUNC_ID \ 74 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 75 ARM_SMCCC_SMC_32, \ 76 0, 0) 77 78 #define ARM_SMCCC_ARCH_FEATURES_FUNC_ID \ 79 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 80 ARM_SMCCC_SMC_32, \ 81 0, 1) 82 83 #define ARM_SMCCC_ARCH_SOC_ID \ 84 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 85 ARM_SMCCC_SMC_32, \ 86 0, 2) 87 88 #define ARM_SMCCC_ARCH_WORKAROUND_1 \ 89 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 90 ARM_SMCCC_SMC_32, \ 91 0, 0x8000) 92 93 #define ARM_SMCCC_ARCH_WORKAROUND_2 \ 94 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 95 ARM_SMCCC_SMC_32, \ 96 0, 0x7fff) 97 98 #define ARM_SMCCC_ARCH_WORKAROUND_3 \ 99 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 100 ARM_SMCCC_SMC_32, \ 101 0, 0x3fff) 102 103 #define ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID \ 104 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 105 ARM_SMCCC_SMC_32, \ 106 ARM_SMCCC_OWNER_VENDOR_HYP, \ 107 ARM_SMCCC_FUNC_QUERY_CALL_UID) 108 109 /* KVM UID value: 28b46fb6-2ec5-11e9-a9ca-4b564d003a74 */ 110 #define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_0 0xb66fb428U 111 #define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_1 0xe911c52eU 112 #define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_2 0x564bcaa9U 113 #define ARM_SMCCC_VENDOR_HYP_UID_KVM_REG_3 0x743a004dU 114 115 /* KVM "vendor specific" services */ 116 #define ARM_SMCCC_KVM_FUNC_FEATURES 0 117 #define ARM_SMCCC_KVM_FUNC_PTP 1 118 /* Start of pKVM hypercall range */ 119 #define ARM_SMCCC_KVM_FUNC_HYP_MEMINFO 2 120 #define ARM_SMCCC_KVM_FUNC_MEM_SHARE 3 121 #define ARM_SMCCC_KVM_FUNC_MEM_UNSHARE 4 122 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_5 5 123 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_6 6 124 #define ARM_SMCCC_KVM_FUNC_MMIO_GUARD 7 125 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_8 8 126 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_9 9 127 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_10 10 128 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_11 11 129 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_12 12 130 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_13 13 131 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_14 14 132 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_15 15 133 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_16 16 134 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_17 17 135 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_18 18 136 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_19 19 137 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_20 20 138 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_21 21 139 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_22 22 140 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_23 23 141 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_24 24 142 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_25 25 143 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_26 26 144 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_27 27 145 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_28 28 146 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_29 29 147 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_30 30 148 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_31 31 149 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_32 32 150 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_33 33 151 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_34 34 152 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_35 35 153 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_36 36 154 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_37 37 155 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_38 38 156 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_39 39 157 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_40 40 158 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_41 41 159 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_42 42 160 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_43 43 161 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_44 44 162 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_45 45 163 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_46 46 164 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_47 47 165 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_48 48 166 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_49 49 167 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_50 50 168 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_51 51 169 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_52 52 170 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_53 53 171 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_54 54 172 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_55 55 173 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_56 56 174 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_57 57 175 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_58 58 176 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_59 59 177 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_60 60 178 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_61 61 179 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_62 62 180 #define ARM_SMCCC_KVM_FUNC_PKVM_RESV_63 63 181 /* End of pKVM hypercall range */ 182 #define ARM_SMCCC_KVM_FUNC_FEATURES_2 127 183 #define ARM_SMCCC_KVM_NUM_FUNCS 128 184 185 #define ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID \ 186 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 187 ARM_SMCCC_SMC_32, \ 188 ARM_SMCCC_OWNER_VENDOR_HYP, \ 189 ARM_SMCCC_KVM_FUNC_FEATURES) 190 191 #define SMCCC_ARCH_WORKAROUND_RET_UNAFFECTED 1 192 193 /* 194 * ptp_kvm is a feature used for time sync between vm and host. 195 * ptp_kvm module in guest kernel will get service from host using 196 * this hypercall ID. 197 */ 198 #define ARM_SMCCC_VENDOR_HYP_KVM_PTP_FUNC_ID \ 199 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 200 ARM_SMCCC_SMC_32, \ 201 ARM_SMCCC_OWNER_VENDOR_HYP, \ 202 ARM_SMCCC_KVM_FUNC_PTP) 203 204 #define ARM_SMCCC_VENDOR_HYP_KVM_HYP_MEMINFO_FUNC_ID \ 205 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 206 ARM_SMCCC_SMC_64, \ 207 ARM_SMCCC_OWNER_VENDOR_HYP, \ 208 ARM_SMCCC_KVM_FUNC_HYP_MEMINFO) 209 210 #define ARM_SMCCC_VENDOR_HYP_KVM_MEM_SHARE_FUNC_ID \ 211 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 212 ARM_SMCCC_SMC_64, \ 213 ARM_SMCCC_OWNER_VENDOR_HYP, \ 214 ARM_SMCCC_KVM_FUNC_MEM_SHARE) 215 216 #define ARM_SMCCC_VENDOR_HYP_KVM_MEM_UNSHARE_FUNC_ID \ 217 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 218 ARM_SMCCC_SMC_64, \ 219 ARM_SMCCC_OWNER_VENDOR_HYP, \ 220 ARM_SMCCC_KVM_FUNC_MEM_UNSHARE) 221 222 #define ARM_SMCCC_VENDOR_HYP_KVM_MMIO_GUARD_FUNC_ID \ 223 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 224 ARM_SMCCC_SMC_64, \ 225 ARM_SMCCC_OWNER_VENDOR_HYP, \ 226 ARM_SMCCC_KVM_FUNC_MMIO_GUARD) 227 228 /* ptp_kvm counter type ID */ 229 #define KVM_PTP_VIRT_COUNTER 0 230 #define KVM_PTP_PHYS_COUNTER 1 231 232 /* Paravirtualised time calls (defined by ARM DEN0057A) */ 233 #define ARM_SMCCC_HV_PV_TIME_FEATURES \ 234 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 235 ARM_SMCCC_SMC_64, \ 236 ARM_SMCCC_OWNER_STANDARD_HYP, \ 237 0x20) 238 239 #define ARM_SMCCC_HV_PV_TIME_ST \ 240 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 241 ARM_SMCCC_SMC_64, \ 242 ARM_SMCCC_OWNER_STANDARD_HYP, \ 243 0x21) 244 245 /* TRNG entropy source calls (defined by ARM DEN0098) */ 246 #define ARM_SMCCC_TRNG_VERSION \ 247 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 248 ARM_SMCCC_SMC_32, \ 249 ARM_SMCCC_OWNER_STANDARD, \ 250 0x50) 251 252 #define ARM_SMCCC_TRNG_FEATURES \ 253 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 254 ARM_SMCCC_SMC_32, \ 255 ARM_SMCCC_OWNER_STANDARD, \ 256 0x51) 257 258 #define ARM_SMCCC_TRNG_GET_UUID \ 259 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 260 ARM_SMCCC_SMC_32, \ 261 ARM_SMCCC_OWNER_STANDARD, \ 262 0x52) 263 264 #define ARM_SMCCC_TRNG_RND32 \ 265 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 266 ARM_SMCCC_SMC_32, \ 267 ARM_SMCCC_OWNER_STANDARD, \ 268 0x53) 269 270 #define ARM_SMCCC_TRNG_RND64 \ 271 ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ 272 ARM_SMCCC_SMC_64, \ 273 ARM_SMCCC_OWNER_STANDARD, \ 274 0x53) 275 276 /* 277 * Return codes defined in ARM DEN 0070A 278 * ARM DEN 0070A is now merged/consolidated into ARM DEN 0028 C 279 */ 280 #define SMCCC_RET_SUCCESS 0 281 #define SMCCC_RET_NOT_SUPPORTED -1 282 #define SMCCC_RET_NOT_REQUIRED -2 283 #define SMCCC_RET_INVALID_PARAMETER -3 284 285 #ifndef __ASSEMBLY__ 286 287 #include <linux/linkage.h> 288 #include <linux/types.h> 289 290 enum arm_smccc_conduit { 291 SMCCC_CONDUIT_NONE, 292 SMCCC_CONDUIT_SMC, 293 SMCCC_CONDUIT_HVC, 294 }; 295 296 /** 297 * arm_smccc_1_1_get_conduit() 298 * 299 * Returns the conduit to be used for SMCCCv1.1 or later. 300 * 301 * When SMCCCv1.1 is not present, returns SMCCC_CONDUIT_NONE. 302 */ 303 enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void); 304 305 /** 306 * arm_smccc_get_version() 307 * 308 * Returns the version to be used for SMCCCv1.1 or later. 309 * 310 * When SMCCCv1.1 or above is not present, returns SMCCCv1.0, but this 311 * does not imply the presence of firmware or a valid conduit. Caller 312 * handling SMCCCv1.0 must determine the conduit by other means. 313 */ 314 u32 arm_smccc_get_version(void); 315 316 void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit); 317 318 /** 319 * arm_smccc_get_soc_id_version() 320 * 321 * Returns the SOC ID version. 322 * 323 * When ARM_SMCCC_ARCH_SOC_ID is not present, returns SMCCC_RET_NOT_SUPPORTED. 324 */ 325 s32 arm_smccc_get_soc_id_version(void); 326 327 /** 328 * arm_smccc_get_soc_id_revision() 329 * 330 * Returns the SOC ID revision. 331 * 332 * When ARM_SMCCC_ARCH_SOC_ID is not present, returns SMCCC_RET_NOT_SUPPORTED. 333 */ 334 s32 arm_smccc_get_soc_id_revision(void); 335 336 /** 337 * struct arm_smccc_res - Result from SMC/HVC call 338 * @a0-a3 result values from registers 0 to 3 339 */ 340 struct arm_smccc_res { 341 unsigned long a0; 342 unsigned long a1; 343 unsigned long a2; 344 unsigned long a3; 345 }; 346 347 #ifdef CONFIG_ARM64 348 /** 349 * struct arm_smccc_1_2_regs - Arguments for or Results from SMC/HVC call 350 * @a0-a17 argument values from registers 0 to 17 351 */ 352 struct arm_smccc_1_2_regs { 353 unsigned long a0; 354 unsigned long a1; 355 unsigned long a2; 356 unsigned long a3; 357 unsigned long a4; 358 unsigned long a5; 359 unsigned long a6; 360 unsigned long a7; 361 unsigned long a8; 362 unsigned long a9; 363 unsigned long a10; 364 unsigned long a11; 365 unsigned long a12; 366 unsigned long a13; 367 unsigned long a14; 368 unsigned long a15; 369 unsigned long a16; 370 unsigned long a17; 371 }; 372 373 /** 374 * arm_smccc_1_2_hvc() - make HVC calls 375 * @args: arguments passed via struct arm_smccc_1_2_regs 376 * @res: result values via struct arm_smccc_1_2_regs 377 * 378 * This function is used to make HVC calls following SMC Calling Convention 379 * v1.2 or above. The content of the supplied param are copied from the 380 * structure to registers prior to the HVC instruction. The return values 381 * are updated with the content from registers on return from the HVC 382 * instruction. 383 */ 384 asmlinkage void arm_smccc_1_2_hvc(const struct arm_smccc_1_2_regs *args, 385 struct arm_smccc_1_2_regs *res); 386 387 /** 388 * arm_smccc_1_2_smc() - make SMC calls 389 * @args: arguments passed via struct arm_smccc_1_2_regs 390 * @res: result values via struct arm_smccc_1_2_regs 391 * 392 * This function is used to make SMC calls following SMC Calling Convention 393 * v1.2 or above. The content of the supplied param are copied from the 394 * structure to registers prior to the SMC instruction. The return values 395 * are updated with the content from registers on return from the SMC 396 * instruction. 397 */ 398 asmlinkage void arm_smccc_1_2_smc(const struct arm_smccc_1_2_regs *args, 399 struct arm_smccc_1_2_regs *res); 400 #endif 401 402 /** 403 * struct arm_smccc_quirk - Contains quirk information 404 * @id: quirk identification 405 * @state: quirk specific information 406 * @a6: Qualcomm quirk entry for returning post-smc call contents of a6 407 */ 408 struct arm_smccc_quirk { 409 int id; 410 union { 411 unsigned long a6; 412 } state; 413 }; 414 415 /** 416 * __arm_smccc_smc() - make SMC calls 417 * @a0-a7: arguments passed in registers 0 to 7 418 * @res: result values from registers 0 to 3 419 * @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required. 420 * 421 * This function is used to make SMC calls following SMC Calling Convention. 422 * The content of the supplied param are copied to registers 0 to 7 prior 423 * to the SMC instruction. The return values are updated with the content 424 * from register 0 to 3 on return from the SMC instruction. An optional 425 * quirk structure provides vendor specific behavior. 426 */ 427 #ifdef CONFIG_HAVE_ARM_SMCCC 428 asmlinkage void __arm_smccc_smc(unsigned long a0, unsigned long a1, 429 unsigned long a2, unsigned long a3, unsigned long a4, 430 unsigned long a5, unsigned long a6, unsigned long a7, 431 struct arm_smccc_res *res, struct arm_smccc_quirk *quirk); 432 #else __arm_smccc_smc(unsigned long a0,unsigned long a1,unsigned long a2,unsigned long a3,unsigned long a4,unsigned long a5,unsigned long a6,unsigned long a7,struct arm_smccc_res * res,struct arm_smccc_quirk * quirk)433 static inline void __arm_smccc_smc(unsigned long a0, unsigned long a1, 434 unsigned long a2, unsigned long a3, unsigned long a4, 435 unsigned long a5, unsigned long a6, unsigned long a7, 436 struct arm_smccc_res *res, struct arm_smccc_quirk *quirk) 437 { 438 *res = (struct arm_smccc_res){}; 439 } 440 #endif 441 442 /** 443 * __arm_smccc_hvc() - make HVC calls 444 * @a0-a7: arguments passed in registers 0 to 7 445 * @res: result values from registers 0 to 3 446 * @quirk: points to an arm_smccc_quirk, or NULL when no quirks are required. 447 * 448 * This function is used to make HVC calls following SMC Calling 449 * Convention. The content of the supplied param are copied to registers 0 450 * to 7 prior to the HVC instruction. The return values are updated with 451 * the content from register 0 to 3 on return from the HVC instruction. An 452 * optional quirk structure provides vendor specific behavior. 453 */ 454 asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1, 455 unsigned long a2, unsigned long a3, unsigned long a4, 456 unsigned long a5, unsigned long a6, unsigned long a7, 457 struct arm_smccc_res *res, struct arm_smccc_quirk *quirk); 458 459 #define arm_smccc_smc(...) __arm_smccc_smc(__VA_ARGS__, NULL) 460 461 #define arm_smccc_smc_quirk(...) __arm_smccc_smc(__VA_ARGS__) 462 463 #define arm_smccc_hvc(...) __arm_smccc_hvc(__VA_ARGS__, NULL) 464 465 #define arm_smccc_hvc_quirk(...) __arm_smccc_hvc(__VA_ARGS__) 466 467 /* SMCCC v1.1 implementation madness follows */ 468 #ifdef CONFIG_ARM64 469 470 #define SMCCC_SMC_INST "smc #0" 471 #define SMCCC_HVC_INST "hvc #0" 472 473 #elif defined(CONFIG_ARM) 474 #include <asm/opcodes-sec.h> 475 #include <asm/opcodes-virt.h> 476 477 #define SMCCC_SMC_INST __SMC(0) 478 #define SMCCC_HVC_INST __HVC(0) 479 480 #endif 481 482 #define __constraint_read_2 "r" (arg0) 483 #define __constraint_read_3 __constraint_read_2, "r" (arg1) 484 #define __constraint_read_4 __constraint_read_3, "r" (arg2) 485 #define __constraint_read_5 __constraint_read_4, "r" (arg3) 486 #define __constraint_read_6 __constraint_read_5, "r" (arg4) 487 #define __constraint_read_7 __constraint_read_6, "r" (arg5) 488 #define __constraint_read_8 __constraint_read_7, "r" (arg6) 489 #define __constraint_read_9 __constraint_read_8, "r" (arg7) 490 491 #define __declare_arg_2(a0, res) \ 492 struct arm_smccc_res *___res = res; \ 493 register unsigned long arg0 asm("r0") = (u32)a0 494 495 #define __declare_arg_3(a0, a1, res) \ 496 typeof(a1) __a1 = a1; \ 497 struct arm_smccc_res *___res = res; \ 498 register unsigned long arg0 asm("r0") = (u32)a0; \ 499 register typeof(a1) arg1 asm("r1") = __a1 500 501 #define __declare_arg_4(a0, a1, a2, res) \ 502 typeof(a1) __a1 = a1; \ 503 typeof(a2) __a2 = a2; \ 504 struct arm_smccc_res *___res = res; \ 505 register unsigned long arg0 asm("r0") = (u32)a0; \ 506 register typeof(a1) arg1 asm("r1") = __a1; \ 507 register typeof(a2) arg2 asm("r2") = __a2 508 509 #define __declare_arg_5(a0, a1, a2, a3, res) \ 510 typeof(a1) __a1 = a1; \ 511 typeof(a2) __a2 = a2; \ 512 typeof(a3) __a3 = a3; \ 513 struct arm_smccc_res *___res = res; \ 514 register unsigned long arg0 asm("r0") = (u32)a0; \ 515 register typeof(a1) arg1 asm("r1") = __a1; \ 516 register typeof(a2) arg2 asm("r2") = __a2; \ 517 register typeof(a3) arg3 asm("r3") = __a3 518 519 #define __declare_arg_6(a0, a1, a2, a3, a4, res) \ 520 typeof(a4) __a4 = a4; \ 521 __declare_arg_5(a0, a1, a2, a3, res); \ 522 register typeof(a4) arg4 asm("r4") = __a4 523 524 #define __declare_arg_7(a0, a1, a2, a3, a4, a5, res) \ 525 typeof(a5) __a5 = a5; \ 526 __declare_arg_6(a0, a1, a2, a3, a4, res); \ 527 register typeof(a5) arg5 asm("r5") = __a5 528 529 #define __declare_arg_8(a0, a1, a2, a3, a4, a5, a6, res) \ 530 typeof(a6) __a6 = a6; \ 531 __declare_arg_7(a0, a1, a2, a3, a4, a5, res); \ 532 register typeof(a6) arg6 asm("r6") = __a6 533 534 #define __declare_arg_9(a0, a1, a2, a3, a4, a5, a6, a7, res) \ 535 typeof(a7) __a7 = a7; \ 536 __declare_arg_8(a0, a1, a2, a3, a4, a5, a6, res); \ 537 register typeof(a7) arg7 asm("r7") = __a7 538 539 /* 540 * We have an output list that is not necessarily used, and GCC feels 541 * entitled to optimise the whole sequence away. "volatile" is what 542 * makes it stick. 543 */ 544 #define __arm_smccc_1_1(inst, ...) \ 545 do { \ 546 register unsigned long r0 asm("r0"); \ 547 register unsigned long r1 asm("r1"); \ 548 register unsigned long r2 asm("r2"); \ 549 register unsigned long r3 asm("r3"); \ 550 CONCATENATE(__declare_arg_, \ 551 COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); \ 552 asm volatile(inst "\n" : \ 553 "=r" (r0), "=r" (r1), "=r" (r2), "=r" (r3) \ 554 : CONCATENATE(__constraint_read_, \ 555 COUNT_ARGS(__VA_ARGS__)) \ 556 : "memory"); \ 557 if (___res) \ 558 *___res = (typeof(*___res)){r0, r1, r2, r3}; \ 559 } while (0) 560 561 /* 562 * arm_smccc_1_1_smc() - make an SMCCC v1.1 compliant SMC call 563 * 564 * This is a variadic macro taking one to eight source arguments, and 565 * an optional return structure. 566 * 567 * @a0-a7: arguments passed in registers 0 to 7 568 * @res: result values from registers 0 to 3 569 * 570 * This macro is used to make SMC calls following SMC Calling Convention v1.1. 571 * The content of the supplied param are copied to registers 0 to 7 prior 572 * to the SMC instruction. The return values are updated with the content 573 * from register 0 to 3 on return from the SMC instruction if not NULL. 574 */ 575 #define arm_smccc_1_1_smc(...) __arm_smccc_1_1(SMCCC_SMC_INST, __VA_ARGS__) 576 577 /* 578 * arm_smccc_1_1_hvc() - make an SMCCC v1.1 compliant HVC call 579 * 580 * This is a variadic macro taking one to eight source arguments, and 581 * an optional return structure. 582 * 583 * @a0-a7: arguments passed in registers 0 to 7 584 * @res: result values from registers 0 to 3 585 * 586 * This macro is used to make HVC calls following SMC Calling Convention v1.1. 587 * The content of the supplied param are copied to registers 0 to 7 prior 588 * to the HVC instruction. The return values are updated with the content 589 * from register 0 to 3 on return from the HVC instruction if not NULL. 590 */ 591 #define arm_smccc_1_1_hvc(...) __arm_smccc_1_1(SMCCC_HVC_INST, __VA_ARGS__) 592 593 /* 594 * Like arm_smccc_1_1* but always returns SMCCC_RET_NOT_SUPPORTED. 595 * Used when the SMCCC conduit is not defined. The empty asm statement 596 * avoids compiler warnings about unused variables. 597 */ 598 #define __fail_smccc_1_1(...) \ 599 do { \ 600 CONCATENATE(__declare_arg_, \ 601 COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); \ 602 asm ("" : \ 603 : CONCATENATE(__constraint_read_, \ 604 COUNT_ARGS(__VA_ARGS__)) \ 605 : "memory"); \ 606 if (___res) \ 607 ___res->a0 = SMCCC_RET_NOT_SUPPORTED; \ 608 } while (0) 609 610 /* 611 * arm_smccc_1_1_invoke() - make an SMCCC v1.1 compliant call 612 * 613 * This is a variadic macro taking one to eight source arguments, and 614 * an optional return structure. 615 * 616 * @a0-a7: arguments passed in registers 0 to 7 617 * @res: result values from registers 0 to 3 618 * 619 * This macro will make either an HVC call or an SMC call depending on the 620 * current SMCCC conduit. If no valid conduit is available then -1 621 * (SMCCC_RET_NOT_SUPPORTED) is returned in @res.a0 (if supplied). 622 * 623 * The return value also provides the conduit that was used. 624 */ 625 #define arm_smccc_1_1_invoke(...) ({ \ 626 int method = arm_smccc_1_1_get_conduit(); \ 627 switch (method) { \ 628 case SMCCC_CONDUIT_HVC: \ 629 arm_smccc_1_1_hvc(__VA_ARGS__); \ 630 break; \ 631 case SMCCC_CONDUIT_SMC: \ 632 arm_smccc_1_1_smc(__VA_ARGS__); \ 633 break; \ 634 default: \ 635 __fail_smccc_1_1(__VA_ARGS__); \ 636 method = SMCCC_CONDUIT_NONE; \ 637 break; \ 638 } \ 639 method; \ 640 }) 641 642 #endif /*__ASSEMBLY__*/ 643 #endif /*__LINUX_ARM_SMCCC_H*/ 644