diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index 92d1f3cd80576a51d78b849109d6496dd5ecf523..5935aadc065fc81b4cb41ab733d2dfdec056550e 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -67,7 +67,8 @@ #define ARM64_HAS_GENERIC_AUTH 46 #define ARM64_HAS_CNP 47 #define ARM64_HAS_ARMv8_4_TTL 48 +#define ARM64_HAS_DCPODP 49 -#define ARM64_NCAPS 49 +#define ARM64_NCAPS 50 #endif /* __ASM_CPUCAPS_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 230cf04c83a66b7c45af8deabef3ab44235c57b3..056c1d2f20c6968fda61a11856ba4b1f74f118f1 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1490,6 +1490,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .field_pos = ID_AA64ISAR1_DPB_SHIFT, .min_field_value = 1, }, + { + .desc = "Data cache clean to Point of Deep Persistence", + .capability = ARM64_HAS_DCPODP, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64ISAR1_EL1, + .sign = FTR_UNSIGNED, + .field_pos = ID_AA64ISAR1_DPB_SHIFT, + .min_field_value = 2, + }, #endif #ifdef CONFIG_ARM64_SVE {