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| author |   Marc Zyngier <maz@kernel.org> | 2018-12-22 12:00:10 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-07-07 09:27:14 +0100 |
| commit | 552ae76face5584085845646c5f57e10c1a4ebdc (patch) | |
| tree | 9b00fd515e081c3d7230e2ee29aa0eb5ed18073e /arch/arm64/include/asm/cpucaps.h | |
| parent | Linux 5.8-rc3 (diff) | |
| download | linux-dev-552ae76face5584085845646c5f57e10c1a4ebdc.tar.xz linux-dev-552ae76face5584085845646c5f57e10c1a4ebdc.zip | |
arm64: Detect the ARMv8.4 TTL feature
In order to reduce the cost of TLB invalidation, the ARMv8.4 TTL
feature allows TLBs to be issued with a level allowing for quicker
invalidation.
Let's detect the feature for now. Further patches will implement
its actual usage.
Reviewed-by : Suzuki K Polose <suzuki.poulose@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/cpucaps.h')
| -rw-r--r-- | arch/arm64/include/asm/cpucaps.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index d7b3bb0cb180..d44ba903d11d 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -62,7 +62,8 @@ #define ARM64_HAS_GENERIC_AUTH 52 #define ARM64_HAS_32BIT_EL1 53 #define ARM64_BTI 54 +#define ARM64_HAS_ARMv8_4_TTL 55 -#define ARM64_NCAPS 55 +#define ARM64_NCAPS 56 #endif /* __ASM_CPUCAPS_H */ |