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authorAndre Przywara <andre.przywara@arm.com>2014-11-14 15:54:09 +0000
committerWill Deacon <will.deacon@arm.com>2014-11-25 13:46:37 +0000
commite116a375423393cdb94714e90a96857005d58428 (patch)
tree50279ff49416483b46dfcb5f38f490d8b10af26a /arch/arm64/include/asm
parente039ee4ee3fcf174736f2cb0a2eed6cb908348a6 (diff)
downloadlinux-e116a375423393cdb94714e90a96857005d58428.tar.gz
arm64: detect silicon revisions and set cap bits accordingly
After each CPU has been started, we iterate through a list of CPU features or bugs to detect CPUs which need (or could benefit from) kernel code patches. For each feature/bug there is a function which checks if that particular CPU is affected. We will later provide some more generic functions for common things like testing for certain MIDR ranges. We do this for every CPU to cover big.LITTLE systems properly as well. If a certain feature/bug has been detected, the capability bit will be set, so that later the call to apply_alternatives() will trigger the actual code patching. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/include/asm')
-rw-r--r--arch/arm64/include/asm/cpufeature.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h
index 20b2b3d6b702..744eaf7fab0f 100644
--- a/arch/arm64/include/asm/cpufeature.h
+++ b/arch/arm64/include/asm/cpufeature.h
@@ -46,4 +46,6 @@ static inline void cpus_set_cap(unsigned int num)
__set_bit(num, cpu_hwcaps);
}
+void check_local_cpu_errata(void);
+
#endif