2 * Contains CPU specific errata definitions
4 * Copyright (C) 2014 ARM Ltd.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include <linux/types.h>
21 #include <asm/cputype.h>
22 #include <asm/cpufeature.h>
24 #define MIDR_CORTEX_A53 MIDR_CPU_PART(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A53)
25 #define MIDR_CORTEX_A57 MIDR_CPU_PART(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A57)
26 #define MIDR_THUNDERX MIDR_CPU_PART(ARM_CPU_IMP_CAVIUM, CAVIUM_CPU_PART_THUNDERX)
28 #define CPU_MODEL_MASK (MIDR_IMPLEMENTOR_MASK | MIDR_PARTNUM_MASK | \
29 MIDR_ARCHITECTURE_MASK)
31 static bool __maybe_unused
32 is_affected_midr_range(const struct arm64_cpu_capabilities *entry)
34 u32 midr = read_cpuid_id();
36 if ((midr & CPU_MODEL_MASK) != entry->midr_model)
39 midr &= MIDR_REVISION_MASK | MIDR_VARIANT_MASK;
41 return (midr >= entry->midr_range_min && midr <= entry->midr_range_max);
44 #define MIDR_RANGE(model, min, max) \
45 .matches = is_affected_midr_range, \
46 .midr_model = model, \
47 .midr_range_min = min, \
50 const struct arm64_cpu_capabilities arm64_errata[] = {
51 #if defined(CONFIG_ARM64_ERRATUM_826319) || \
52 defined(CONFIG_ARM64_ERRATUM_827319) || \
53 defined(CONFIG_ARM64_ERRATUM_824069)
55 /* Cortex-A53 r0p[012] */
56 .desc = "ARM errata 826319, 827319, 824069",
57 .capability = ARM64_WORKAROUND_CLEAN_CACHE,
58 MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x02),
61 #ifdef CONFIG_ARM64_ERRATUM_819472
63 /* Cortex-A53 r0p[01] */
64 .desc = "ARM errata 819472",
65 .capability = ARM64_WORKAROUND_CLEAN_CACHE,
66 MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x01),
69 #ifdef CONFIG_ARM64_ERRATUM_832075
71 /* Cortex-A57 r0p0 - r1p2 */
72 .desc = "ARM erratum 832075",
73 .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
74 MIDR_RANGE(MIDR_CORTEX_A57, 0x00,
75 (1 << MIDR_VARIANT_SHIFT) | 2),
78 #ifdef CONFIG_ARM64_ERRATUM_834220
80 /* Cortex-A57 r0p0 - r1p2 */
81 .desc = "ARM erratum 834220",
82 .capability = ARM64_WORKAROUND_834220,
83 MIDR_RANGE(MIDR_CORTEX_A57, 0x00,
84 (1 << MIDR_VARIANT_SHIFT) | 2),
87 #ifdef CONFIG_ARM64_ERRATUM_845719
89 /* Cortex-A53 r0p[01234] */
90 .desc = "ARM erratum 845719",
91 .capability = ARM64_WORKAROUND_845719,
92 MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x04),
95 #ifdef CONFIG_CAVIUM_ERRATUM_23154
97 /* Cavium ThunderX, pass 1.x */
98 .desc = "Cavium erratum 23154",
99 .capability = ARM64_WORKAROUND_CAVIUM_23154,
100 MIDR_RANGE(MIDR_THUNDERX, 0x00, 0x01),
107 void check_local_cpu_errata(void)
109 update_cpu_capabilities(arm64_errata, "enabling workaround for");