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| author |   Robin Murphy <robin.murphy@arm.com> | 2017-07-25 11:55:42 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2017-08-09 12:15:45 +0100 |
| commit | d50e071fdaa33c1b399c764c44fa1ce879881185 (patch) | |
| tree | c0af7e49c8f4124195159e1d6380d521bea435d3 /arch/arm64/kernel | |
| parent | arm64: Handle trapped DC CVAP (diff) | |
| download | linux-dev-d50e071fdaa33c1b399c764c44fa1ce879881185.tar.xz linux-dev-d50e071fdaa33c1b399c764c44fa1ce879881185.zip | |
arm64: Implement pmem API support
Add a clean-to-point-of-persistence cache maintenance helper, and wire
up the basic architectural support for the pmem driver based on it.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[catalin.marinas@arm.com: move arch_*_pmem() functions to arch/arm64/mm/flush.c]
[catalin.marinas@arm.com: change dmb(sy) to dmb(osh)]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index a2542ef3ff25..cd52d365d1f0 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -889,6 +889,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .min_field_value = 0, .matches = has_no_fpsimd, }, +#ifdef CONFIG_ARM64_PMEM + { + .desc = "Data cache clean to Point of Persistence", + .capability = ARM64_HAS_DCPOP, + .def_scope = SCOPE_SYSTEM, + .matches = has_cpuid_feature, + .sys_reg = SYS_ID_AA64ISAR1_EL1, + .field_pos = ID_AA64ISAR1_DPB_SHIFT, + .min_field_value = 1, + }, +#endif {}, }; |