1 /* 2 * Copyright (c) 2013-2024, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef CONTEXT_H 8 #define CONTEXT_H 9 10 #include <lib/el3_runtime/context_el2.h> 11 #include <lib/el3_runtime/cpu_data.h> 12 #include <lib/utils_def.h> 13 14 /******************************************************************************* 15 * Constants that allow assembler code to access members of and the 'gp_regs' 16 * structure at their correct offsets. 17 ******************************************************************************/ 18 #define CTX_GPREGS_OFFSET U(0x0) 19 #define CTX_GPREG_X0 U(0x0) 20 #define CTX_GPREG_X1 U(0x8) 21 #define CTX_GPREG_X2 U(0x10) 22 #define CTX_GPREG_X3 U(0x18) 23 #define CTX_GPREG_X4 U(0x20) 24 #define CTX_GPREG_X5 U(0x28) 25 #define CTX_GPREG_X6 U(0x30) 26 #define CTX_GPREG_X7 U(0x38) 27 #define CTX_GPREG_X8 U(0x40) 28 #define CTX_GPREG_X9 U(0x48) 29 #define CTX_GPREG_X10 U(0x50) 30 #define CTX_GPREG_X11 U(0x58) 31 #define CTX_GPREG_X12 U(0x60) 32 #define CTX_GPREG_X13 U(0x68) 33 #define CTX_GPREG_X14 U(0x70) 34 #define CTX_GPREG_X15 U(0x78) 35 #define CTX_GPREG_X16 U(0x80) 36 #define CTX_GPREG_X17 U(0x88) 37 #define CTX_GPREG_X18 U(0x90) 38 #define CTX_GPREG_X19 U(0x98) 39 #define CTX_GPREG_X20 U(0xa0) 40 #define CTX_GPREG_X21 U(0xa8) 41 #define CTX_GPREG_X22 U(0xb0) 42 #define CTX_GPREG_X23 U(0xb8) 43 #define CTX_GPREG_X24 U(0xc0) 44 #define CTX_GPREG_X25 U(0xc8) 45 #define CTX_GPREG_X26 U(0xd0) 46 #define CTX_GPREG_X27 U(0xd8) 47 #define CTX_GPREG_X28 U(0xe0) 48 #define CTX_GPREG_X29 U(0xe8) 49 #define CTX_GPREG_LR U(0xf0) 50 #define CTX_GPREG_SP_EL0 U(0xf8) 51 #define CTX_GPREGS_END U(0x100) 52 53 /******************************************************************************* 54 * Constants that allow assembler code to access members of and the 'el3_state' 55 * structure at their correct offsets. Note that some of the registers are only 56 * 32-bits wide but are stored as 64-bit values for convenience 57 ******************************************************************************/ 58 #define CTX_EL3STATE_OFFSET (CTX_GPREGS_OFFSET + CTX_GPREGS_END) 59 #define CTX_SCR_EL3 U(0x0) 60 #define CTX_ESR_EL3 U(0x8) 61 #define CTX_RUNTIME_SP U(0x10) 62 #define CTX_SPSR_EL3 U(0x18) 63 #define CTX_ELR_EL3 U(0x20) 64 #define CTX_PMCR_EL0 U(0x28) 65 #define CTX_IS_IN_EL3 U(0x30) 66 /* Constants required in supporting nested exception in EL3 */ 67 #define CTX_SAVED_ELR_EL3 U(0x38) 68 /* 69 * General purpose flag, to save various EL3 states 70 * FFH mode : Used to identify if handling nested exception 71 * KFH mode : Used as counter value 72 */ 73 #define CTX_NESTED_EA_FLAG U(0x40) 74 #if FFH_SUPPORT 75 #define CTX_SAVED_ESR_EL3 U(0x48) 76 #define CTX_SAVED_SPSR_EL3 U(0x50) 77 #define CTX_SAVED_GPREG_LR U(0x58) 78 #define CTX_EL3STATE_END U(0x60) /* Align to the next 16 byte boundary */ 79 #else 80 #define CTX_EL3STATE_END U(0x50) /* Align to the next 16 byte boundary */ 81 #endif /* FFH_SUPPORT */ 82 83 /******************************************************************************* 84 * Constants that allow assembler code to access members of and the 85 * 'el1_sys_regs' structure at their correct offsets. Note that some of the 86 * registers are only 32-bits wide but are stored as 64-bit values for 87 * convenience 88 ******************************************************************************/ 89 #define CTX_EL1_SYSREGS_OFFSET (CTX_EL3STATE_OFFSET + CTX_EL3STATE_END) 90 #define CTX_SPSR_EL1 U(0x0) 91 #define CTX_ELR_EL1 U(0x8) 92 #define CTX_SCTLR_EL1 U(0x10) 93 #define CTX_TCR_EL1 U(0x18) 94 #define CTX_CPACR_EL1 U(0x20) 95 #define CTX_CSSELR_EL1 U(0x28) 96 #define CTX_SP_EL1 U(0x30) 97 #define CTX_ESR_EL1 U(0x38) 98 #define CTX_TTBR0_EL1 U(0x40) 99 #define CTX_TTBR1_EL1 U(0x48) 100 #define CTX_MAIR_EL1 U(0x50) 101 #define CTX_AMAIR_EL1 U(0x58) 102 #define CTX_ACTLR_EL1 U(0x60) 103 #define CTX_TPIDR_EL1 U(0x68) 104 #define CTX_TPIDR_EL0 U(0x70) 105 #define CTX_TPIDRRO_EL0 U(0x78) 106 #define CTX_PAR_EL1 U(0x80) 107 #define CTX_FAR_EL1 U(0x88) 108 #define CTX_AFSR0_EL1 U(0x90) 109 #define CTX_AFSR1_EL1 U(0x98) 110 #define CTX_CONTEXTIDR_EL1 U(0xa0) 111 #define CTX_VBAR_EL1 U(0xa8) 112 #define CTX_MDCCINT_EL1 U(0xb0) 113 #define CTX_MDSCR_EL1 U(0xb8) 114 115 #define CTX_AARCH64_END U(0xc0) /* Align to the next 16 byte boundary */ 116 117 /* 118 * If the platform is AArch64-only, there is no need to save and restore these 119 * AArch32 registers. 120 */ 121 #if CTX_INCLUDE_AARCH32_REGS 122 #define CTX_SPSR_ABT (CTX_AARCH64_END + U(0x0)) 123 #define CTX_SPSR_UND (CTX_AARCH64_END + U(0x8)) 124 #define CTX_SPSR_IRQ (CTX_AARCH64_END + U(0x10)) 125 #define CTX_SPSR_FIQ (CTX_AARCH64_END + U(0x18)) 126 #define CTX_DACR32_EL2 (CTX_AARCH64_END + U(0x20)) 127 #define CTX_IFSR32_EL2 (CTX_AARCH64_END + U(0x28)) 128 #define CTX_AARCH32_END (CTX_AARCH64_END + U(0x30)) /* Align to the next 16 byte boundary */ 129 #else 130 #define CTX_AARCH32_END CTX_AARCH64_END 131 #endif /* CTX_INCLUDE_AARCH32_REGS */ 132 133 /* 134 * If the timer registers aren't saved and restored, we don't have to reserve 135 * space for them in the context 136 */ 137 #if NS_TIMER_SWITCH 138 #define CTX_CNTP_CTL_EL0 (CTX_AARCH32_END + U(0x0)) 139 #define CTX_CNTP_CVAL_EL0 (CTX_AARCH32_END + U(0x8)) 140 #define CTX_CNTV_CTL_EL0 (CTX_AARCH32_END + U(0x10)) 141 #define CTX_CNTV_CVAL_EL0 (CTX_AARCH32_END + U(0x18)) 142 #define CTX_CNTKCTL_EL1 (CTX_AARCH32_END + U(0x20)) 143 #define CTX_TIMER_SYSREGS_END (CTX_AARCH32_END + U(0x30)) /* Align to the next 16 byte boundary */ 144 #else 145 #define CTX_TIMER_SYSREGS_END CTX_AARCH32_END 146 #endif /* NS_TIMER_SWITCH */ 147 148 #if ENABLE_FEAT_MTE2 149 #define CTX_TFSRE0_EL1 (CTX_TIMER_SYSREGS_END + U(0x0)) 150 #define CTX_TFSR_EL1 (CTX_TIMER_SYSREGS_END + U(0x8)) 151 #define CTX_RGSR_EL1 (CTX_TIMER_SYSREGS_END + U(0x10)) 152 #define CTX_GCR_EL1 (CTX_TIMER_SYSREGS_END + U(0x18)) 153 #define CTX_MTE_REGS_END (CTX_TIMER_SYSREGS_END + U(0x20)) /* Align to the next 16 byte boundary */ 154 #else 155 #define CTX_MTE_REGS_END CTX_TIMER_SYSREGS_END 156 #endif /* ENABLE_FEAT_MTE2 */ 157 158 #if ENABLE_FEAT_RAS 159 #define CTX_DISR_EL1 (CTX_MTE_REGS_END + U(0x0)) 160 #define CTX_RAS_REGS_END (CTX_MTE_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 161 #else 162 #define CTX_RAS_REGS_END CTX_MTE_REGS_END 163 #endif /* ENABLE_FEAT_RAS */ 164 165 #if ENABLE_FEAT_S1PIE 166 #define CTX_PIRE0_EL1 (CTX_RAS_REGS_END + U(0x0)) 167 #define CTX_PIR_EL1 (CTX_RAS_REGS_END + U(0x8)) 168 #define CTX_S1PIE_REGS_END (CTX_RAS_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 169 #else 170 #define CTX_S1PIE_REGS_END CTX_RAS_REGS_END 171 #endif /* ENABLE_FEAT_S1PIE */ 172 173 #if ENABLE_FEAT_S1POE 174 #define CTX_POR_EL1 (CTX_S1PIE_REGS_END + U(0x0)) 175 #define CTX_S1POE_REGS_END (CTX_S1PIE_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 176 #else 177 #define CTX_S1POE_REGS_END CTX_S1PIE_REGS_END 178 #endif /* ENABLE_FEAT_S1POE */ 179 180 #if ENABLE_FEAT_S2POE 181 #define CTX_S2POR_EL1 (CTX_S1POE_REGS_END + U(0x0)) 182 #define CTX_S2POE_REGS_END (CTX_S1POE_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 183 #else 184 #define CTX_S2POE_REGS_END CTX_S1POE_REGS_END 185 #endif /* ENABLE_FEAT_S2POE */ 186 187 #if ENABLE_FEAT_TCR2 188 #define CTX_TCR2_EL1 (CTX_S2POE_REGS_END + U(0x0)) 189 #define CTX_TCR2_REGS_END (CTX_S2POE_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 190 #else 191 #define CTX_TCR2_REGS_END CTX_S2POE_REGS_END 192 #endif /* ENABLE_FEAT_TCR2 */ 193 194 #if ENABLE_TRF_FOR_NS 195 #define CTX_TRFCR_EL1 (CTX_TCR2_REGS_END + U(0x0)) 196 #define CTX_TRF_REGS_END (CTX_TCR2_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 197 #else 198 #define CTX_TRF_REGS_END CTX_TCR2_REGS_END 199 #endif /* ENABLE_TRF_FOR_NS */ 200 201 #if ENABLE_FEAT_CSV2_2 202 #define CTX_SCXTNUM_EL0 (CTX_TRF_REGS_END + U(0x0)) 203 #define CTX_SCXTNUM_EL1 (CTX_TRF_REGS_END + U(0x8)) 204 #define CTX_CSV2_2_REGS_END (CTX_TRF_REGS_END + U(0x10)) /* Align to the next 16 byte boundary */ 205 #else 206 #define CTX_CSV2_2_REGS_END CTX_TRF_REGS_END 207 #endif /* ENABLE_FEAT_CSV2_2 */ 208 209 #if ENABLE_FEAT_GCS 210 #define CTX_GCSCR_EL1 (CTX_CSV2_2_REGS_END + U(0x0)) 211 #define CTX_GCSCRE0_EL1 (CTX_CSV2_2_REGS_END + U(0x8)) 212 #define CTX_GCSPR_EL1 (CTX_CSV2_2_REGS_END + U(0x10)) 213 #define CTX_GCSPR_EL0 (CTX_CSV2_2_REGS_END + U(0x18)) 214 #define CTX_GCS_REGS_END (CTX_CSV2_2_REGS_END + U(0x20)) /* Align to the next 16 byte boundary */ 215 #else 216 #define CTX_GCS_REGS_END CTX_CSV2_2_REGS_END 217 #endif /* ENABLE_FEAT_GCS */ 218 219 /* 220 * End of EL1 system registers. 221 */ 222 #define CTX_EL1_SYSREGS_END CTX_GCS_REGS_END 223 224 /******************************************************************************* 225 * Constants that allow assembler code to access members of and the 'fp_regs' 226 * structure at their correct offsets. 227 ******************************************************************************/ 228 # define CTX_FPREGS_OFFSET (CTX_EL1_SYSREGS_OFFSET + CTX_EL1_SYSREGS_END) 229 #if CTX_INCLUDE_FPREGS 230 #define CTX_FP_Q0 U(0x0) 231 #define CTX_FP_Q1 U(0x10) 232 #define CTX_FP_Q2 U(0x20) 233 #define CTX_FP_Q3 U(0x30) 234 #define CTX_FP_Q4 U(0x40) 235 #define CTX_FP_Q5 U(0x50) 236 #define CTX_FP_Q6 U(0x60) 237 #define CTX_FP_Q7 U(0x70) 238 #define CTX_FP_Q8 U(0x80) 239 #define CTX_FP_Q9 U(0x90) 240 #define CTX_FP_Q10 U(0xa0) 241 #define CTX_FP_Q11 U(0xb0) 242 #define CTX_FP_Q12 U(0xc0) 243 #define CTX_FP_Q13 U(0xd0) 244 #define CTX_FP_Q14 U(0xe0) 245 #define CTX_FP_Q15 U(0xf0) 246 #define CTX_FP_Q16 U(0x100) 247 #define CTX_FP_Q17 U(0x110) 248 #define CTX_FP_Q18 U(0x120) 249 #define CTX_FP_Q19 U(0x130) 250 #define CTX_FP_Q20 U(0x140) 251 #define CTX_FP_Q21 U(0x150) 252 #define CTX_FP_Q22 U(0x160) 253 #define CTX_FP_Q23 U(0x170) 254 #define CTX_FP_Q24 U(0x180) 255 #define CTX_FP_Q25 U(0x190) 256 #define CTX_FP_Q26 U(0x1a0) 257 #define CTX_FP_Q27 U(0x1b0) 258 #define CTX_FP_Q28 U(0x1c0) 259 #define CTX_FP_Q29 U(0x1d0) 260 #define CTX_FP_Q30 U(0x1e0) 261 #define CTX_FP_Q31 U(0x1f0) 262 #define CTX_FP_FPSR U(0x200) 263 #define CTX_FP_FPCR U(0x208) 264 #if CTX_INCLUDE_AARCH32_REGS 265 #define CTX_FP_FPEXC32_EL2 U(0x210) 266 #define CTX_FPREGS_END U(0x220) /* Align to the next 16 byte boundary */ 267 #else 268 #define CTX_FPREGS_END U(0x210) /* Align to the next 16 byte boundary */ 269 #endif /* CTX_INCLUDE_AARCH32_REGS */ 270 #else 271 #define CTX_FPREGS_END U(0) 272 #endif /* CTX_INCLUDE_FPREGS */ 273 274 /******************************************************************************* 275 * Registers related to CVE-2018-3639 276 ******************************************************************************/ 277 #define CTX_CVE_2018_3639_OFFSET (CTX_FPREGS_OFFSET + CTX_FPREGS_END) 278 #define CTX_CVE_2018_3639_DISABLE U(0) 279 #define CTX_CVE_2018_3639_END U(0x10) /* Align to the next 16 byte boundary */ 280 281 /******************************************************************************* 282 * Registers related to ARMv8.3-PAuth. 283 ******************************************************************************/ 284 #define CTX_PAUTH_REGS_OFFSET (CTX_CVE_2018_3639_OFFSET + CTX_CVE_2018_3639_END) 285 #if CTX_INCLUDE_PAUTH_REGS 286 #define CTX_PACIAKEY_LO U(0x0) 287 #define CTX_PACIAKEY_HI U(0x8) 288 #define CTX_PACIBKEY_LO U(0x10) 289 #define CTX_PACIBKEY_HI U(0x18) 290 #define CTX_PACDAKEY_LO U(0x20) 291 #define CTX_PACDAKEY_HI U(0x28) 292 #define CTX_PACDBKEY_LO U(0x30) 293 #define CTX_PACDBKEY_HI U(0x38) 294 #define CTX_PACGAKEY_LO U(0x40) 295 #define CTX_PACGAKEY_HI U(0x48) 296 #define CTX_PAUTH_REGS_END U(0x50) /* Align to the next 16 byte boundary */ 297 #else 298 #define CTX_PAUTH_REGS_END U(0) 299 #endif /* CTX_INCLUDE_PAUTH_REGS */ 300 301 /******************************************************************************* 302 * Registers related to ARMv8.2-MPAM. 303 ******************************************************************************/ 304 #define CTX_MPAM_REGS_OFFSET (CTX_PAUTH_REGS_OFFSET + CTX_PAUTH_REGS_END) 305 #if CTX_INCLUDE_MPAM_REGS 306 #define CTX_MPAM2_EL2 U(0x0) 307 #define CTX_MPAMHCR_EL2 U(0x8) 308 #define CTX_MPAMVPM0_EL2 U(0x10) 309 #define CTX_MPAMVPM1_EL2 U(0x18) 310 #define CTX_MPAMVPM2_EL2 U(0x20) 311 #define CTX_MPAMVPM3_EL2 U(0x28) 312 #define CTX_MPAMVPM4_EL2 U(0x30) 313 #define CTX_MPAMVPM5_EL2 U(0x38) 314 #define CTX_MPAMVPM6_EL2 U(0x40) 315 #define CTX_MPAMVPM7_EL2 U(0x48) 316 #define CTX_MPAMVPMV_EL2 U(0x50) 317 #define CTX_MPAM_REGS_END U(0x60) 318 #else 319 #define CTX_MPAM_REGS_END U(0x0) 320 #endif /* CTX_INCLUDE_MPAM_REGS */ 321 322 /******************************************************************************* 323 * Registers initialised in a per-world context. 324 ******************************************************************************/ 325 #define CTX_CPTR_EL3 U(0x0) 326 #define CTX_ZCR_EL3 U(0x8) 327 #define CTX_MPAM3_EL3 U(0x10) 328 #define CTX_PERWORLD_EL3STATE_END U(0x18) 329 330 #ifndef __ASSEMBLER__ 331 332 #include <stdint.h> 333 334 #include <lib/cassert.h> 335 336 /* 337 * Common constants to help define the 'cpu_context' structure and its 338 * members below. 339 */ 340 #define DWORD_SHIFT U(3) 341 #define DEFINE_REG_STRUCT(name, num_regs) \ 342 typedef struct name { \ 343 uint64_t ctx_regs[num_regs]; \ 344 } __aligned(16) name##_t 345 346 /* Constants to determine the size of individual context structures */ 347 #define CTX_GPREG_ALL (CTX_GPREGS_END >> DWORD_SHIFT) 348 #define CTX_EL1_SYSREGS_ALL (CTX_EL1_SYSREGS_END >> DWORD_SHIFT) 349 350 #if CTX_INCLUDE_FPREGS 351 # define CTX_FPREG_ALL (CTX_FPREGS_END >> DWORD_SHIFT) 352 #endif 353 #define CTX_EL3STATE_ALL (CTX_EL3STATE_END >> DWORD_SHIFT) 354 #define CTX_CVE_2018_3639_ALL (CTX_CVE_2018_3639_END >> DWORD_SHIFT) 355 #if CTX_INCLUDE_PAUTH_REGS 356 # define CTX_PAUTH_REGS_ALL (CTX_PAUTH_REGS_END >> DWORD_SHIFT) 357 #endif 358 #if CTX_INCLUDE_MPAM_REGS 359 # define CTX_MPAM_REGS_ALL (CTX_MPAM_REGS_END >> DWORD_SHIFT) 360 #endif 361 362 /* 363 * AArch64 general purpose register context structure. Usually x0-x18, 364 * lr are saved as the compiler is expected to preserve the remaining 365 * callee saved registers if used by the C runtime and the assembler 366 * does not touch the remaining. But in case of world switch during 367 * exception handling, we need to save the callee registers too. 368 */ 369 DEFINE_REG_STRUCT(gp_regs, CTX_GPREG_ALL); 370 371 /* 372 * AArch64 EL1 system register context structure for preserving the 373 * architectural state during world switches. 374 */ 375 DEFINE_REG_STRUCT(el1_sysregs, CTX_EL1_SYSREGS_ALL); 376 377 /* 378 * AArch64 floating point register context structure for preserving 379 * the floating point state during switches from one security state to 380 * another. 381 */ 382 #if CTX_INCLUDE_FPREGS 383 DEFINE_REG_STRUCT(fp_regs, CTX_FPREG_ALL); 384 #endif 385 386 /* 387 * Miscellaneous registers used by EL3 firmware to maintain its state 388 * across exception entries and exits 389 */ 390 DEFINE_REG_STRUCT(el3_state, CTX_EL3STATE_ALL); 391 392 /* Function pointer used by CVE-2018-3639 dynamic mitigation */ 393 DEFINE_REG_STRUCT(cve_2018_3639, CTX_CVE_2018_3639_ALL); 394 395 /* Registers associated to ARMv8.3-PAuth */ 396 #if CTX_INCLUDE_PAUTH_REGS 397 DEFINE_REG_STRUCT(pauth, CTX_PAUTH_REGS_ALL); 398 #endif 399 400 /* Registers associated to ARMv8.2 MPAM */ 401 #if CTX_INCLUDE_MPAM_REGS 402 DEFINE_REG_STRUCT(mpam, CTX_MPAM_REGS_ALL); 403 #endif 404 405 /* 406 * Macros to access members of any of the above structures using their 407 * offsets 408 */ 409 #define read_ctx_reg(ctx, offset) ((ctx)->ctx_regs[(offset) >> DWORD_SHIFT]) 410 #define write_ctx_reg(ctx, offset, val) (((ctx)->ctx_regs[(offset) >> DWORD_SHIFT]) \ 411 = (uint64_t) (val)) 412 413 /* 414 * Top-level context structure which is used by EL3 firmware to preserve 415 * the state of a core at the next lower EL in a given security state and 416 * save enough EL3 meta data to be able to return to that EL and security 417 * state. The context management library will be used to ensure that 418 * SP_EL3 always points to an instance of this structure at exception 419 * entry and exit. 420 */ 421 typedef struct cpu_context { 422 gp_regs_t gpregs_ctx; 423 el3_state_t el3state_ctx; 424 el1_sysregs_t el1_sysregs_ctx; 425 426 #if CTX_INCLUDE_FPREGS 427 fp_regs_t fpregs_ctx; 428 #endif 429 cve_2018_3639_t cve_2018_3639_ctx; 430 431 #if CTX_INCLUDE_PAUTH_REGS 432 pauth_t pauth_ctx; 433 #endif 434 435 #if CTX_INCLUDE_MPAM_REGS 436 mpam_t mpam_ctx; 437 #endif 438 439 #if CTX_INCLUDE_EL2_REGS 440 el2_sysregs_t el2_sysregs_ctx; 441 #endif 442 443 } cpu_context_t; 444 445 /* 446 * Per-World Context. 447 * It stores registers whose values can be shared across CPUs. 448 */ 449 typedef struct per_world_context { 450 uint64_t ctx_cptr_el3; 451 uint64_t ctx_zcr_el3; 452 uint64_t ctx_mpam3_el3; 453 } per_world_context_t; 454 455 extern per_world_context_t per_world_context[CPU_DATA_CONTEXT_NUM]; 456 457 /* Macros to access members of the 'cpu_context_t' structure */ 458 #define get_el3state_ctx(h) (&((cpu_context_t *) h)->el3state_ctx) 459 #if CTX_INCLUDE_FPREGS 460 # define get_fpregs_ctx(h) (&((cpu_context_t *) h)->fpregs_ctx) 461 #endif 462 #define get_el1_sysregs_ctx(h) (&((cpu_context_t *) h)->el1_sysregs_ctx) 463 #if CTX_INCLUDE_EL2_REGS 464 # define get_el2_sysregs_ctx(h) (&((cpu_context_t *) h)->el2_sysregs_ctx) 465 #endif 466 #define get_gpregs_ctx(h) (&((cpu_context_t *) h)->gpregs_ctx) 467 #define get_cve_2018_3639_ctx(h) (&((cpu_context_t *) h)->cve_2018_3639_ctx) 468 #if CTX_INCLUDE_PAUTH_REGS 469 # define get_pauth_ctx(h) (&((cpu_context_t *) h)->pauth_ctx) 470 #endif 471 #if CTX_INCLUDE_MPAM_REGS 472 # define get_mpam_ctx(h) (&((cpu_context_t *) h)->mpam_ctx) 473 #endif 474 475 /* 476 * Compile time assertions related to the 'cpu_context' structure to 477 * ensure that the assembler and the compiler view of the offsets of 478 * the structure members is the same. 479 */ 480 CASSERT(CTX_GPREGS_OFFSET == __builtin_offsetof(cpu_context_t, gpregs_ctx), 481 assert_core_context_gp_offset_mismatch); 482 483 CASSERT(CTX_EL3STATE_OFFSET == __builtin_offsetof(cpu_context_t, el3state_ctx), 484 assert_core_context_el3state_offset_mismatch); 485 486 CASSERT(CTX_EL1_SYSREGS_OFFSET == __builtin_offsetof(cpu_context_t, el1_sysregs_ctx), 487 assert_core_context_el1_sys_offset_mismatch); 488 489 #if CTX_INCLUDE_FPREGS 490 CASSERT(CTX_FPREGS_OFFSET == __builtin_offsetof(cpu_context_t, fpregs_ctx), 491 assert_core_context_fp_offset_mismatch); 492 #endif /* CTX_INCLUDE_FPREGS */ 493 494 CASSERT(CTX_CVE_2018_3639_OFFSET == __builtin_offsetof(cpu_context_t, cve_2018_3639_ctx), 495 assert_core_context_cve_2018_3639_offset_mismatch); 496 497 #if CTX_INCLUDE_PAUTH_REGS 498 CASSERT(CTX_PAUTH_REGS_OFFSET == __builtin_offsetof(cpu_context_t, pauth_ctx), 499 assert_core_context_pauth_offset_mismatch); 500 #endif /* CTX_INCLUDE_PAUTH_REGS */ 501 502 #if CTX_INCLUDE_MPAM_REGS 503 CASSERT(CTX_MPAM_REGS_OFFSET == __builtin_offsetof(cpu_context_t, mpam_ctx), 504 assert_core_context_mpam_offset_mismatch); 505 #endif /* CTX_INCLUDE_MPAM_REGS */ 506 507 /* 508 * Helper macro to set the general purpose registers that correspond to 509 * parameters in an aapcs_64 call i.e. x0-x7 510 */ 511 #define set_aapcs_args0(ctx, x0) do { \ 512 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X0, x0); \ 513 } while (0) 514 #define set_aapcs_args1(ctx, x0, x1) do { \ 515 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X1, x1); \ 516 set_aapcs_args0(ctx, x0); \ 517 } while (0) 518 #define set_aapcs_args2(ctx, x0, x1, x2) do { \ 519 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X2, x2); \ 520 set_aapcs_args1(ctx, x0, x1); \ 521 } while (0) 522 #define set_aapcs_args3(ctx, x0, x1, x2, x3) do { \ 523 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X3, x3); \ 524 set_aapcs_args2(ctx, x0, x1, x2); \ 525 } while (0) 526 #define set_aapcs_args4(ctx, x0, x1, x2, x3, x4) do { \ 527 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X4, x4); \ 528 set_aapcs_args3(ctx, x0, x1, x2, x3); \ 529 } while (0) 530 #define set_aapcs_args5(ctx, x0, x1, x2, x3, x4, x5) do { \ 531 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X5, x5); \ 532 set_aapcs_args4(ctx, x0, x1, x2, x3, x4); \ 533 } while (0) 534 #define set_aapcs_args6(ctx, x0, x1, x2, x3, x4, x5, x6) do { \ 535 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X6, x6); \ 536 set_aapcs_args5(ctx, x0, x1, x2, x3, x4, x5); \ 537 } while (0) 538 #define set_aapcs_args7(ctx, x0, x1, x2, x3, x4, x5, x6, x7) do { \ 539 write_ctx_reg(get_gpregs_ctx(ctx), CTX_GPREG_X7, x7); \ 540 set_aapcs_args6(ctx, x0, x1, x2, x3, x4, x5, x6); \ 541 } while (0) 542 543 /******************************************************************************* 544 * Function prototypes 545 ******************************************************************************/ 546 #if CTX_INCLUDE_FPREGS 547 void fpregs_context_save(fp_regs_t *regs); 548 void fpregs_context_restore(fp_regs_t *regs); 549 #endif 550 551 #endif /* __ASSEMBLER__ */ 552 553 #endif /* CONTEXT_H */ 554