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| author | Robin Murphy <robin.murphy@arm.com> | 2017-07-25 12:55:42 +0200 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2017-08-09 13:15:45 +0200 |
| commit | d50e071fdaa33c1b399c764c44fa1ce879881185 (patch) | |
| tree | c0af7e49c8f4124195159e1d6380d521bea435d3 /arch/arm64/Kconfig | |
| parent | arm64: Handle trapped DC CVAP (diff) | |
| download | linux-d50e071fdaa33c1b399c764c44fa1ce879881185.tar.xz linux-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/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index dfd908630631..0b0576a54724 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -960,6 +960,17 @@ config ARM64_UAO regular load/store instructions if the cpu does not implement the feature. +config ARM64_PMEM + bool "Enable support for persistent memory" + select ARCH_HAS_PMEM_API + help + Say Y to enable support for the persistent memory API based on the + ARMv8.2 DCPoP feature. + + The feature is detected at runtime, and the kernel will use DC CVAC + operations if DC CVAP is not supported (following the behaviour of + DC CVAP itself if the system does not define a point of persistence). + endmenu config ARM64_MODULE_CMODEL_LARGE |