diff options
| author | Marc Zyngier <maz@kernel.org> | 2021-02-08 09:57:20 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-09 13:47:12 +0000 |
| commit | b3341ae0efa235726ad69e53ce83c6a3c445bda8 (patch) | |
| tree | a96dc0f125d91656c6db48ed21be255d7a2ecf1f /arch/arm64/include | |
| parent | 8f266a5d878ad38fbd43e41e22847650f51d4734 (diff) | |
| download | linux-b3341ae0efa235726ad69e53ce83c6a3c445bda8.tar.gz | |
arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding()
__read_sysreg_by_encoding() is used by a bunch of cpufeature helpers,
which should take the feature override into account. Let's do that.
For a good measure (and because we are likely to need to further
down the line), make this helper available to the rest of the
non-modular kernel.
Code that needs to know the *real* features of a CPU can still
use read_sysreg_s(), and find the bare, ugly truth.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: David Brazdil <dbrazdil@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210208095732.3267263-12-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index b1f53147e2b2..b5bf7af68691 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -606,6 +606,7 @@ void __init setup_cpu_features(void); void check_local_cpu_capabilities(void); u64 read_sanitised_ftr_reg(u32 id); +u64 __read_sysreg_by_encoding(u32 sys_id); static inline bool cpu_supports_mixed_endian_el0(void) { |