diff options
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 57 | ||||
| -rw-r--r-- | arch/arm64/kernel/smp.c | 9 |
3 files changed, 33 insertions, 34 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index f6d416fe49b0..2ea24c5cb900 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -617,6 +617,7 @@ static inline bool id_aa64pfr1_mte(u64 pfr1) return val >= ID_AA64PFR1_EL1_MTE_MTE2; } +void __init setup_boot_cpu_features(void); void __init setup_system_features(void); void __init setup_user_features(void); diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 5f1320c38aa2..e976538c11ac 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1081,25 +1081,6 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) if (id_aa64pfr1_mte(info->reg_id_aa64pfr1)) init_cpu_ftr_reg(SYS_GMID_EL1, info->reg_gmid); - - /* - * Initialize the indirect array of CPU capabilities pointers before we - * handle the boot CPU below. - */ - init_cpucap_indirect_list(); - - /* - * Detect broken pseudo-NMI. Must be called _before_ the call to - * setup_boot_cpu_capabilities() since it interacts with - * can_use_gic_priorities(). - */ - detect_system_supports_pseudo_nmi(); - - /* - * Detect and enable early CPU capabilities based on the boot CPU, - * after we have initialised the CPU feature infrastructure. - */ - setup_boot_cpu_capabilities(); } static void update_cpu_ftr_reg(struct arm64_ftr_reg *reg, u64 new) @@ -3255,14 +3236,6 @@ void check_local_cpu_capabilities(void) verify_local_cpu_capabilities(); } -static void __init setup_boot_cpu_capabilities(void) -{ - /* Detect capabilities with either SCOPE_BOOT_CPU or SCOPE_LOCAL_CPU */ - update_cpu_capabilities(SCOPE_BOOT_CPU | SCOPE_LOCAL_CPU); - /* Enable the SCOPE_BOOT_CPU capabilities alone right away */ - enable_cpu_capabilities(SCOPE_BOOT_CPU); -} - bool this_cpu_has_cap(unsigned int n) { if (!WARN_ON(preemptible()) && n < ARM64_NCAPS) { @@ -3318,6 +3291,36 @@ unsigned long cpu_get_elf_hwcap2(void) return elf_hwcap[1]; } +static void __init setup_boot_cpu_capabilities(void) +{ + /* + * The boot CPU's feature register values have been recorded. Detect + * boot cpucaps and local cpucaps for the boot CPU, then enable and + * patch alternatives for the available boot cpucaps. + */ + update_cpu_capabilities(SCOPE_BOOT_CPU | SCOPE_LOCAL_CPU); + enable_cpu_capabilities(SCOPE_BOOT_CPU); + apply_boot_alternatives(); +} + +void __init setup_boot_cpu_features(void) +{ + /* + * Initialize the indirect array of CPU capabilities pointers before we + * handle the boot CPU. + */ + init_cpucap_indirect_list(); + + /* + * Detect broken pseudo-NMI. Must be called _before_ the call to + * setup_boot_cpu_capabilities() since it interacts with + * can_use_gic_priorities(). + */ + detect_system_supports_pseudo_nmi(); + + setup_boot_cpu_capabilities(); +} + static void __init setup_system_capabilities(void) { /* diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 85384dc9a89d..4ced34f62dab 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -453,14 +453,9 @@ void __init smp_prepare_boot_cpu(void) * freed shortly, so we must move over to the runtime per-cpu area. */ set_my_cpu_offset(per_cpu_offset(smp_processor_id())); - cpuinfo_store_boot_cpu(); - /* - * We now know enough about the boot CPU to apply the - * alternatives that cannot wait until interrupt handling - * and/or scheduling is enabled. - */ - apply_boot_alternatives(); + cpuinfo_store_boot_cpu(); + setup_boot_cpu_features(); /* Conditionally switch to GIC PMR for interrupt masking */ if (system_uses_irq_prio_masking()) |