1 /* 2 * Copyright (c) 2017-2025, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef ERRATA_H 8 #define ERRATA_H 9 10 #include <lib/cpus/cpu_ops.h> 11 12 #define ERRATUM_CHECK_FUNC_SIZE CPU_WORD_SIZE 13 #define ERRATUM_ID_SIZE 4 14 #define ERRATUM_CVE_SIZE 2 15 #define ERRATUM_CHOSEN_SIZE 1 16 #define ERRATUM_ALIGNMENT_SIZE 1 17 18 #define ERRATUM_CHECK_FUNC 0 19 #define ERRATUM_ID ERRATUM_CHECK_FUNC + ERRATUM_CHECK_FUNC_SIZE 20 #define ERRATUM_CVE ERRATUM_ID + ERRATUM_ID_SIZE 21 #define ERRATUM_CHOSEN ERRATUM_CVE + ERRATUM_CVE_SIZE 22 #define ERRATUM_ALIGNMENT ERRATUM_CHOSEN + ERRATUM_CHOSEN_SIZE 23 #define ERRATUM_ENTRY_SIZE ERRATUM_ALIGNMENT + ERRATUM_ALIGNMENT_SIZE 24 25 /* Errata status */ 26 #define ERRATA_NOT_APPLIES 0 27 #define ERRATA_APPLIES 1 28 #define ERRATA_MISSING 2 29 30 #ifndef __ASSEMBLER__ 31 #include <lib/cassert.h> 32 33 void print_errata_status(void); 34 35 /* 36 * NOTE that this structure will be different on AArch32 and AArch64. The 37 * uintptr_t will reflect the change and the alignment will be correct in both. 38 */ 39 struct erratum_entry { 40 uintptr_t (*check_func)(uint64_t cpu_rev); 41 /* Will fit CVEs with up to 10 character in the ID field */ 42 uint32_t id; 43 /* Denote CVEs with their year or errata with 0 */ 44 uint16_t cve; 45 uint8_t chosen; 46 uint8_t _alignment; 47 } __packed; 48 49 CASSERT(sizeof(struct erratum_entry) == ERRATUM_ENTRY_SIZE, 50 assert_erratum_entry_asm_c_different_sizes); 51 52 /* 53 * Runtime errata helpers. 54 */ 55 #if ERRATA_A75_764081 56 bool errata_a75_764081_applies(void); 57 #else 58 static inline bool errata_a75_764081_applies(void) 59 { 60 return false; 61 } 62 #endif 63 64 #if ERRATA_A520_2938996 || ERRATA_X4_2726228 65 unsigned int check_if_affected_core(void); 66 #endif 67 68 int check_wa_cve_2024_7881(void); 69 bool errata_ich_vmcr_el2_applies(void); 70 71 #else 72 73 /* 74 * errata framework macro helpers 75 * 76 * NOTE an erratum and CVE id could clash. However, both numbers are very large 77 * and the probablity is minuscule. Working around this makes code very 78 * complicated and extremely difficult to read so it is not considered. In the 79 * unlikely event that this does happen, prepending the CVE id with a 0 should 80 * resolve the conflict 81 */ 82 #define ERRATUM(id) 0, id 83 #define CVE(year, id) year, id 84 #define NO_ISB 1 85 #define NO_ASSERT 0 86 #define NO_APPLY_AT_RESET 0 87 #define APPLY_AT_RESET 1 88 #define GET_CPU_REV 1 89 #define NO_GET_CPU_REV 0 90 91 /* useful for errata that end up always being worked around */ 92 #define ERRATUM_ALWAYS_CHOSEN 1 93 94 #endif /* __ASSEMBLER__ */ 95 96 /* Macro to get CPU revision code for checking errata version compatibility. */ 97 #define CPU_REV(r, p) ((r << 4) | p) 98 99 #endif /* ERRATA_H */ 100