arm64: proton-pack: Add new CPUs 'k' values for branch mitigation

commit efe676a1a7554219eae0b0dcfe1e0cdcc9ef9aef upstream.

Update the list of 'k' values for the branch mitigation from arm's
website.

Add the values for Cortex-X1C. The MIDR_EL1 value can be found here:
https://developer.arm.com/documentation/101968/0002/Register-descriptions/AArch>

Link: https://developer.arm.com/documentation/110280/2-0/?lang=en
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index 2a4e686e633c623165fd10278ef33c634a9147ce..8a6b7feca3e428083d5d1d318076408baa8d6f1b 100644 (file)
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -81,6 +81,7 @@
 #define ARM_CPU_PART_CORTEX_A78AE      0xD42
 #define ARM_CPU_PART_CORTEX_X1         0xD44
 #define ARM_CPU_PART_CORTEX_A510       0xD46
+#define ARM_CPU_PART_CORTEX_X1C                0xD4C
 #define ARM_CPU_PART_CORTEX_A520       0xD80
 #define ARM_CPU_PART_CORTEX_A710       0xD47
 #define ARM_CPU_PART_CORTEX_A715       0xD4D
@@ -166,6 +167,7 @@
 #define MIDR_CORTEX_A78AE      MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A78AE)
 #define MIDR_CORTEX_X1 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_X1)
 #define MIDR_CORTEX_A510 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A510)
+#define MIDR_CORTEX_X1C MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_X1C)
 #define MIDR_CORTEX_A520 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A520)
 #define MIDR_CORTEX_A710 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A710)
 #define MIDR_CORTEX_A715 MIDR_CPU_MODEL(ARM_CPU_IMP_ARM, ARM_CPU_PART_CORTEX_A715)

diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c
index 5fc2e9bdb3860c3aee8e6a325bbd21cfcf7dfc17..28c48bc9c09538084dc33c6ac5a4b8571b9e7ed8 100644 (file)
--- a/arch/arm64/kernel/proton-pack.c
+++ b/arch/arm64/kernel/proton-pack.c
@@ -891,6 +891,7 @@ static u8 spectre_bhb_loop_affected(void)
                MIDR_ALL_VERSIONS(MIDR_CORTEX_A78AE),
                MIDR_ALL_VERSIONS(MIDR_CORTEX_A78C),
                MIDR_ALL_VERSIONS(MIDR_CORTEX_X1),
+               MIDR_ALL_VERSIONS(MIDR_CORTEX_X1C),
                MIDR_ALL_VERSIONS(MIDR_CORTEX_A710),
                MIDR_ALL_VERSIONS(MIDR_CORTEX_X2),
                MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),