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| author | Xie XiuQi | 2018-01-15 20:38:56 +0100 |
|---|---|---|
| committer | Catalin Marinas | 2018-01-16 16:05:48 +0100 |
| commit | 64c02720ea3598bf5143b672274d923a941b8053 (patch) | |
| tree | 5a5920a4da384a18c5b202626df5913706d2118a /arch/arm64/Kconfig | |
| parent | arm64: sysreg: Move to use definitions for all the SCTLR bits (diff) | |
| download | kernel-qcow2-linux-64c02720ea3598bf5143b672274d923a941b8053.tar.gz kernel-qcow2-linux-64c02720ea3598bf5143b672274d923a941b8053.tar.xz kernel-qcow2-linux-64c02720ea3598bf5143b672274d923a941b8053.zip | |
arm64: cpufeature: Detect CPU RAS Extentions
ARM's v8.2 Extentions add support for Reliability, Availability and
Serviceability (RAS). On CPUs with these extensions system software
can use additional barriers to isolate errors and determine if faults
are pending. Add cpufeature detection.
Platform level RAS support may require additional firmware support.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Xie XiuQi <xiexiuqi@huawei.com>
[Rebased added config option, reworded commit message]
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 664fadc2aa2e..1d51c8edf34b 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1062,6 +1062,22 @@ config ARM64_PMEM operations if DC CVAP is not supported (following the behaviour of DC CVAP itself if the system does not define a point of persistence). +config ARM64_RAS_EXTN + bool "Enable support for RAS CPU Extensions" + default y + help + CPUs that support the Reliability, Availability and Serviceability + (RAS) Extensions, part of ARMv8.2 are able to track faults and + errors, classify them and report them to software. + + On CPUs with these extensions system software can use additional + barriers to determine if faults are pending and read the + classification from a new set of registers. + + Selecting this feature will allow the kernel to use these barriers + and access the new registers if the system supports the extension. + Platform RAS features may additionally depend on firmware support. + endmenu config ARM64_SVE |