diff mbox series

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

Message ID 20200106225414.20795-1-f.fainelli@gmail.com (mailing list archive)
State Mainlined
Commit 31d868c49017140970d3a4ae45ab11d67618011c
Headers show
Series arm64: kpti: Add Broadcom Brahma-B53 core to the KPTI whitelist | expand

Commit Message

Florian Fainelli Jan. 6, 2020, 10:54 p.m. UTC 
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 mbox series

Patch

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),