| Message ID | 20250325141900.2057314-1-yangjinqian1@huawei.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64: Add support for HIP09 Spectre-BHB mitigation | expand |
On Tue, 25 Mar 2025 22:19:00 +0800, Jinqian Yang wrote: > The HIP09 processor is vulnerable to the Spectre-BHB (Branch History > Buffer) attack, which can be exploited to leak information through > branch prediction side channels. This commit adds the MIDR of HIP09 > to the list for software mitigation. > > Applied to arm64 (for-next/core), thanks! Please check that I added it in the right place as it was conflicting with the current for-next/core. [1/1] arm64: Add support for HIP09 Spectre-BHB mitigation https://git.kernel.org/arm64/c/e18c09b204e8
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 6f3f4142e214..363a9cbe780e 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -130,6 +130,7 @@ #define FUJITSU_CPU_PART_A64FX 0x001 #define HISI_CPU_PART_TSV110 0xD01 +#define HISI_CPU_PART_HIP09 0xD02 #define APPLE_CPU_PART_M1_ICESTORM 0x022 #define APPLE_CPU_PART_M1_FIRESTORM 0x023 @@ -204,6 +205,7 @@ #define MIDR_NVIDIA_CARMEL MIDR_CPU_MODEL(ARM_CPU_IMP_NVIDIA, NVIDIA_CPU_PART_CARMEL) #define MIDR_FUJITSU_A64FX MIDR_CPU_MODEL(ARM_CPU_IMP_FUJITSU, FUJITSU_CPU_PART_A64FX) #define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110) +#define MIDR_HISI_HIP09 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_HIP09) #define MIDR_APPLE_M1_ICESTORM MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM) #define MIDR_APPLE_M1_FIRESTORM MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_FIRESTORM) #define MIDR_APPLE_M1_ICESTORM_PRO MIDR_CPU_MODEL(ARM_CPU_IMP_APPLE, APPLE_CPU_PART_M1_ICESTORM_PRO) diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c index da53722f95d4..98bb7251a184 100644 --- a/arch/arm64/kernel/proton-pack.c +++ b/arch/arm64/kernel/proton-pack.c @@ -866,6 +866,7 @@ u8 spectre_bhb_loop_affected(int scope) MIDR_ALL_VERSIONS(MIDR_CORTEX_A76), MIDR_ALL_VERSIONS(MIDR_CORTEX_A77), MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1), + MIDR_ALL_VERSIONS(MIDR_HISI_HIP09), {}, }; static const struct midr_range spectre_bhb_k11_list[] = {
The HIP09 processor is vulnerable to the Spectre-BHB (Branch History Buffer) attack, which can be exploited to leak information through branch prediction side channels. This commit adds the MIDR of HIP09 to the list for software mitigation. Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com> --- arch/arm64/include/asm/cputype.h | 2 ++ arch/arm64/kernel/proton-pack.c | 1 + 2 files changed, 3 insertions(+)