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arm64/kernel: enable A53 erratum #8434319 handling at runtime

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Omit patching of ADRP instruction at module load time if the current
CPUs are not susceptible to the erratum.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[will: Drop duplicate initialisation of .def_scope field]
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ard Biesheuvel
2018-03-06 17:15:35 +00:00
committed by Will Deacon
parent e8002e02ab
commit ca79acca27
4 changed files with 14 additions and 2 deletions
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9
arch/arm64/kernel/cpu_errata.c
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@@ -298,6 +298,15 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
MIDR_CPU_VAR_REV(1, 2)),
},
#endif
#ifdef CONFIG_ARM64_ERRATUM_843419
{
/* Cortex-A53 r0p[01234] */
.desc = "ARM erratum 843419",
.capability = ARM64_WORKAROUND_843419,
MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x04),
MIDR_FIXED(0x4, BIT(8)),
},
#endif
#ifdef CONFIG_ARM64_ERRATUM_845719
{
/* Cortex-A53 r0p[01234] */