diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index 5935aadc065fc81b4cb41ab733d2dfdec056550e..d805e2369517dea716b58dc0b070a3cf7f3de28f 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -68,7 +68,8 @@ #define ARM64_HAS_CNP 47 #define ARM64_HAS_ARMv8_4_TTL 48 #define ARM64_HAS_DCPODP 49 +#define ARM64_HAS_TLB_RANGE 50 -#define ARM64_NCAPS 50 +#define ARM64_NCAPS 51 #endif /* __ASM_CPUCAPS_H */ diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index d6a1e27e8c69088578ba8d16560c46b7c3d363f7..72eb8d63dee701f95e4570e83274098a0c83011a 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -546,6 +546,9 @@ #define ID_AA64ISAR0_SHA1_SHIFT 8 #define ID_AA64ISAR0_AES_SHIFT 4 +#define ID_AA64ISAR0_TLB_RANGE_NI 0x0 +#define ID_AA64ISAR0_TLB_RANGE 0x2 + /* id_aa64isar1 */ #define ID_AA64ISAR1_SB_SHIFT 36 #define ID_AA64ISAR1_GPI_SHIFT 28 diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 73da5619ddaae7b8849488d25f515f338e85c63b..eee6104335397f5eef224e45832c27634cb1ad77 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1574,6 +1574,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .min_field_value = 1, .matches = has_cpuid_feature, }, + { + .desc = "TLB range maintenance instructions", + .capability = ARM64_HAS_TLB_RANGE, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64ISAR0_EL1, + .field_pos = ID_AA64ISAR0_TLB_SHIFT, + .sign = FTR_UNSIGNED, + .min_field_value = ID_AA64ISAR0_TLB_RANGE, + }, #ifdef CONFIG_ARM64_HW_AFDBM { /*