Messages in this thread Patch in this message | | | From | Suzuki K Poulose <> | Subject | [PATCH v4 09/22] arm64: capabilities: Split the processing of errata work arounds | Date | Tue, 13 Mar 2018 11:51:07 +0000 |
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Right now we run through the errata workarounds check on all boot active CPUs, with SCOPE_ALL. This wouldn't help for detecting erratum workarounds with a SYSTEM_SCOPE. There are none yet, but we plan to introduce some: let us clean this up so that such workarounds can be detected and enabled correctly.
So, we run the checks with SCOPE_LOCAL_CPU on all CPUs and SCOPE_SYSTEM checks are run only once after all the boot time CPUs are active.
Reviewed-by: Dave Martin <dave.martin@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- arch/arm64/kernel/cpufeature.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 4386675af189..9f2152858c05 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -557,7 +557,7 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) * Run the errata work around checks on the boot CPU, once we have * initialised the cpu feature infrastructure. */ - update_cpu_capabilities(arm64_errata, SCOPE_ALL, + update_cpu_capabilities(arm64_errata, SCOPE_LOCAL_CPU, "enabling workaround for"); } @@ -1445,7 +1445,7 @@ void check_local_cpu_capabilities(void) * advertised capabilities. */ if (!sys_caps_initialised) - update_cpu_capabilities(arm64_errata, SCOPE_ALL, + update_cpu_capabilities(arm64_errata, SCOPE_LOCAL_CPU, "enabling workaround for"); else verify_local_cpu_capabilities(); @@ -1473,6 +1473,8 @@ void __init setup_cpu_features(void) /* Set the CPU feature capabilies */ update_cpu_capabilities(arm64_features, SCOPE_ALL, "detected:"); + update_cpu_capabilities(arm64_errata, SCOPE_SYSTEM, + "enabling workaround for"); enable_cpu_capabilities(arm64_features, SCOPE_ALL); enable_cpu_capabilities(arm64_errata, SCOPE_ALL); mark_const_caps_ready(); -- 2.14.3
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