From: Florian Fainelli Date: Mon, 6 Jan 2020 22:54:12 +0000 (-0800) Subject: arm64: kpti: Add Broadcom Brahma-B53 core to the KPTI whitelist X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=31d868c49017140970d3a4ae45ab11d67618011c;p=openwrt%2Fstaging%2Fblogic.git 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 Signed-off-by: Will Deacon --- diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 04cf64e9f0c9..0427b72c960b 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -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),