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authorRobin Murphy <robin.murphy@arm.com>2017-07-25 11:55:42 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2017-08-09 12:15:45 +0100
commitd50e071fdaa33c1b399c764c44fa1ce879881185 (patch)
treec0af7e49c8f4124195159e1d6380d521bea435d3 /arch/arm64/Kconfig
parentarm64: Handle trapped DC CVAP (diff)
downloadlinux-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/Kconfig')
-rw-r--r--arch/arm64/Kconfig11
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