]> git.baikalelectronics.ru Git - kernel.git/commit
arm64: Allow a capability to be checked on a single CPU
authorMarc Zyngier <marc.zyngier@arm.com>
Fri, 22 Apr 2016 11:25:32 +0000 (12:25 +0100)
committerWill Deacon <will.deacon@arm.com>
Mon, 25 Apr 2016 14:13:05 +0000 (15:13 +0100)
commit037f93b1ef4d331c9990c0c49d8b0b35c576e9ee
tree456828adc71dc6cc53861c704a55ce425805db83
parent11eebc0525153a43af095a605af56ace4ce4cece
arm64: Allow a capability to be checked on a single CPU

Now that the capabilities are only available once all the CPUs
have booted, we're unable to check for a particular feature
in any subsystem that gets initialized before then.

In order to support this, introduce a local_cpu_has_cap() function
that tests for the presence of a given capability independently
of the whole framework.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
[ Added preemptible() check ]
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
[will: remove duplicate initialisation of caps in this_cpu_has_cap]
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/include/asm/cpufeature.h
arch/arm64/kernel/cpufeature.c