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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/kernel/cpuinfo.c
parente039ee4ee3fcf174736f2cb0a2eed6cb908348a6 (diff)
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/kernel/cpuinfo.c')
-rw-r--r--arch/arm64/kernel/cpuinfo.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 504fdaa8367e..16d6d032ecf1 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -18,6 +18,7 @@
#include <asm/cachetype.h>
#include <asm/cpu.h>
#include <asm/cputype.h>
+#include <asm/cpufeature.h>
#include <linux/bitops.h>
#include <linux/bug.h>
@@ -186,6 +187,8 @@ static void __cpuinfo_store_cpu(struct cpuinfo_arm64 *info)
info->reg_id_pfr1 = read_cpuid(ID_PFR1_EL1);
cpuinfo_detect_icache_policy(info);
+
+ check_local_cpu_errata();
}
void cpuinfo_store_cpu(void)