Messages in this thread Patch in this message | | | From | "Suzuki K. Poulose" <> | Subject | [PATCH 10/22] arm64: Cleanup mixed endian support detection | Date | Wed, 16 Sep 2015 15:21:08 +0100 |
| |
From: "Suzuki K. Poulose" <suzuki.poulose@arm.com>
Make use of the system wide safe register to decide the support for mixed endian.
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> --- arch/arm64/kernel/cpufeature.c | 32 ++++++++++---------------------- 1 file changed, 10 insertions(+), 22 deletions(-)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index a736c13..7010617 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -24,7 +24,6 @@ #include <asm/processor.h> #include <asm/sysreg.h> -static bool mixed_endian_el0 = true; unsigned long elf_hwcap __read_mostly; EXPORT_SYMBOL_GPL(elf_hwcap); @@ -42,22 +41,6 @@ unsigned int compat_elf_hwcap2 __read_mostly; DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS); - -bool cpu_supports_mixed_endian_el0(void) -{ - return id_aa64mmfr0_mixed_endian_el0(read_cpuid(ID_AA64MMFR0_EL1)); -} - -bool system_supports_mixed_endian_el0(void) -{ - return mixed_endian_el0; -} - -static void update_mixed_endian_el0_support(struct cpuinfo_arm64 *info) -{ - mixed_endian_el0 &= id_aa64mmfr0_mixed_endian_el0(info->reg_id_aa64mmfr0); -} - #define ARM64_FTR_BITS(ftr_strict, ftr_type, ftr_shift, ftr_width, ftr_safe_val) \ { \ .strict = ftr_strict, \ @@ -437,9 +420,6 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) init_cpu_ftr_reg(SYS_MVFR0_EL1, info->reg_mvfr0); init_cpu_ftr_reg(SYS_MVFR1_EL1, info->reg_mvfr1); init_cpu_ftr_reg(SYS_MVFR2_EL1, info->reg_mvfr2); - - /* This will be removed later, once we start using the infrastructure */ - update_mixed_endian_el0_support(info); } static void update_cpu_ftr_reg(struct arm64_ftr_reg *reg, u64 new) @@ -589,8 +569,6 @@ void update_cpu_features(int cpu, */ WARN_TAINT_ONCE(taint, TAINT_CPU_OUT_OF_SPEC, "Unsupported CPU feature variation.\n"); - - update_mixed_endian_el0_support(info); } u64 read_system_reg(u32 id) @@ -680,6 +658,16 @@ void check_local_cpu_features(void) check_cpu_capabilities(arm64_features, "detected feature:"); } +bool cpu_supports_mixed_endian_el0(void) +{ + return id_aa64mmfr0_mixed_endian_el0(read_cpuid(ID_AA64MMFR0_EL1)); +} + +bool system_supports_mixed_endian_el0(void) +{ + return id_aa64mmfr0_mixed_endian_el0(read_system_reg(SYS_ID_AA64MMFR0_EL1)); +} + void __init setup_cpu_features(void) { u64 features; -- 1.7.9.5
| |