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| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-04-18 10:28:34 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2016-04-20 12:22:42 +0100 |
| commit | c80aba803a9aa131f997f62a71ab453e456d08a8 (patch) | |
| tree | f308b668d7718f4c18f5c964362b0fa571461b42 | |
| parent | arm64: HWCAP: Split COMPAT HWCAP table entries (diff) | |
| download | linux-dev-c80aba803a9aa131f997f62a71ab453e456d08a8.tar.xz linux-dev-c80aba803a9aa131f997f62a71ab453e456d08a8.zip | |
arm64: Add helpers for detecting AArch32 support at EL0
Adds a helper to extract the support for AArch32 at EL0
Tested-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 7 | ||||
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 1 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index b9b649422fca..7f64285e4ef7 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -170,6 +170,13 @@ static inline bool id_aa64mmfr0_mixed_endian_el0(u64 mmfr0) cpuid_feature_extract_unsigned_field(mmfr0, ID_AA64MMFR0_BIGENDEL0_SHIFT) == 0x1; } +static inline bool id_aa64pfr0_32bit_el0(u64 pfr0) +{ + u32 val = cpuid_feature_extract_unsigned_field(pfr0, ID_AA64PFR0_EL0_SHIFT); + + return val == ID_AA64PFR0_EL0_32BIT_64BIT; +} + void __init setup_cpu_features(void); void update_cpu_capabilities(const struct arm64_cpu_capabilities *caps, diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 19182ef18f8f..d39d4343318a 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -115,6 +115,7 @@ #define ID_AA64PFR0_ASIMD_SUPPORTED 0x0 #define ID_AA64PFR0_EL1_64BIT_ONLY 0x1 #define ID_AA64PFR0_EL0_64BIT_ONLY 0x1 +#define ID_AA64PFR0_EL0_32BIT_64BIT 0x2 /* id_aa64mmfr0 */ #define ID_AA64MMFR0_TGRAN4_SHIFT 28 |