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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-04-18 10:28:37 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2016-04-20 12:22:42 +0100 |
| commit | 643d703d2d2dbf8e2f16efa0a6a32b1eca101d02 (patch) | |
| tree | 5dc230cc9dc4d09fd679570c2090bec3c952b97a /arch/arm64/kernel/cpufeature.c | |
| parent | 042446a31e3803d81c7e618dd80928dc3dce70c5 (diff) | |
| download | linux-643d703d2d2dbf8e2f16efa0a6a32b1eca101d02.tar.bz2 | |
arm64: compat: Check for AArch32 state
Make sure we have AArch32 state available for running COMPAT
binaries and also for switching the personality to PER_LINUX32.
Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
[ Added cap bit, checks for HWCAP, personality ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Yury Norov <ynorov@caviumnetworks.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/kernel/cpufeature.c')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 40a23f24559d..8e62d61f6c42 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -987,7 +987,8 @@ void verify_local_cpu_capabilities(void) verify_local_cpu_features(arm64_features); verify_local_elf_hwcaps(arm64_elf_hwcaps); - verify_local_elf_hwcaps(compat_elf_hwcaps); + if (system_supports_32bit_el0()) + verify_local_elf_hwcaps(compat_elf_hwcaps); } static void __init setup_feature_capabilities(void) @@ -1004,7 +1005,9 @@ void __init setup_cpu_features(void) /* Set the CPU feature capabilies */ setup_feature_capabilities(); setup_elf_hwcaps(arm64_elf_hwcaps); - setup_elf_hwcaps(compat_elf_hwcaps); + + if (system_supports_32bit_el0()) + setup_elf_hwcaps(compat_elf_hwcaps); /* Advertise that we have computed the system capabilities */ set_sys_caps_initialised(); |