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arm64: kpti: Add Broadcom Brahma-B53 core to the KPTI whitelist 

Broadcom Brahma-B53 CPUs do not implement ID_AA64PFR0_EL1.CSV3 but are
not susceptible to Meltdown, so add all Brahma-B53 part numbers to
kpti_safe_list[].

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Florian Fainelli 2020-01-06 14:54:12 -08:00 committed by Will Deacon
parent b3c75c9d76
commit 31d868c490
1 changed files with 1 additions and 0 deletions
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arch/arm64/kernel/cpufeature.c
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@ -975,6 +975,7 @@ static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
static const struct midr_range kpti_safe_list[] = {
MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2),
MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN),
MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53),
MIDR_ALL_VERSIONS(MIDR_CORTEX_A35),
MIDR_ALL_VERSIONS(MIDR_CORTEX_A53),
MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),