* [PATCH] arm64: kpti: Add Broadcom Brahma-B53 core to the KPTI whitelist
@ 2020-01-06 22:54 Florian Fainelli
0 siblings, 0 replies; only message in thread
From: Florian Fainelli @ 2020-01-06 22:54 UTC (permalink / raw)
To: linux-arm-kernel
Cc: bcm-kernel-feedback-list, opendmb, Florian Fainelli,
Catalin Marinas, Will Deacon, Suzuki K Poulose, Dave Martin,
Julien Thierry, Andrew Murray, Julien Grall, Jeremy Linton,
Thomas Gleixner, open list
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>
---
arch/arm64/kernel/cpufeature.c | 1 +
1 file changed, 1 insertion(+)
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),
--
2.17.1
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2020-01-06 22:54 [PATCH] arm64: kpti: Add Broadcom Brahma-B53 core to the KPTI whitelist Florian Fainelli
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