[PATCH v3 01/21] arm64: capabilities: Move errata work around check on boot CPU
From: suzuki.poulose@arm.com (Suzuki K Poulose)
Date: 2018-02-09 17:57:06
Also in:
lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
We trigger CPU errata work around check on the boot CPU from smp_prepare_boot_cpu() to make sure that we run the checks only after the CPU feature infrastructure is initialised. While this is correct, we can also do this from init_cpu_features() which initilises the infrastructure, and is called only on the Boot CPU. This helps to consolidate the CPU capability handling to cpufeature.c. No functional changes. Cc: Will Deacon <redacted> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Dave Martin <dave.martin@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- arch/arm64/kernel/cpufeature.c | 6 ++++++ arch/arm64/kernel/smp.c | 6 ------ 2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index dc7efed09135..5c08d886b53d 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c@@ -545,6 +545,12 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) init_cpu_ftr_reg(SYS_ZCR_EL1, info->reg_zcr); sve_init_vq_map(); } + + /* + * Run the errata work around checks on the boot CPU, once we have + * initialised the cpu feature infrastructure. + */ + update_cpu_errata_workarounds(); } static void update_cpu_ftr_reg(struct arm64_ftr_reg *reg, u64 new)
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 3b8ad7be9c33..5cef11450183 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c@@ -448,12 +448,6 @@ void __init smp_prepare_boot_cpu(void) jump_label_init(); cpuinfo_store_boot_cpu(); save_boot_cpu_run_el(); - /* - * Run the errata work around checks on the boot CPU, once we have - * initialised the cpu feature infrastructure from - * cpuinfo_store_boot_cpu() above. - */ - update_cpu_errata_workarounds(); } static u64 __init of_get_cpu_mpidr(struct device_node *dn)
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2.14.3