diff options
Diffstat (limited to 'arch/arm64/kernel')
-rw-r--r-- | arch/arm64/kernel/cpufeature.c | 46 | ||||
-rw-r--r-- | arch/arm64/kernel/fpsimd.c | 4 | ||||
-rw-r--r-- | arch/arm64/kernel/smp.c | 3 |
3 files changed, 30 insertions, 23 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index b335da126e86..5f1320c38aa2 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -3318,23 +3318,40 @@ unsigned long cpu_get_elf_hwcap2(void) return elf_hwcap[1]; } -void __init setup_system_features(void) +static void __init setup_system_capabilities(void) { - int i; /* - * The system-wide safe feature feature register values have been - * finalized. Finalize and log the available system capabilities. + * The system-wide safe feature register values have been finalized. + * Detect, enable, and patch alternatives for the available system + * cpucaps. */ update_cpu_capabilities(SCOPE_SYSTEM); - if (IS_ENABLED(CONFIG_ARM64_SW_TTBR0_PAN) && - !cpus_have_cap(ARM64_HAS_PAN)) - pr_info("emulated: Privileged Access Never (PAN) using TTBR0_EL1 switching\n"); + enable_cpu_capabilities(SCOPE_ALL & ~SCOPE_BOOT_CPU); + apply_alternatives_all(); /* - * Enable all the available capabilities which have not been enabled - * already. + * Log any cpucaps with a cpumask as these aren't logged by + * update_cpu_capabilities(). */ - enable_cpu_capabilities(SCOPE_ALL & ~SCOPE_BOOT_CPU); + for (int i = 0; i < ARM64_NCAPS; i++) { + const struct arm64_cpu_capabilities *caps = cpucap_ptrs[i]; + + if (caps && caps->cpus && caps->desc && + cpumask_any(caps->cpus) < nr_cpu_ids) + pr_info("detected: %s on CPU%*pbl\n", + caps->desc, cpumask_pr_args(caps->cpus)); + } + + /* + * TTBR0 PAN doesn't have its own cpucap, so log it manually. + */ + if (system_uses_ttbr0_pan()) + pr_info("emulated: Privileged Access Never (PAN) using TTBR0_EL1 switching\n"); +} + +void __init setup_system_features(void) +{ + setup_system_capabilities(); kpti_install_ng_mappings(); @@ -3347,15 +3364,6 @@ void __init setup_system_features(void) if (!cache_type_cwg()) pr_warn("No Cache Writeback Granule information, assuming %d\n", ARCH_DMA_MINALIGN); - - for (i = 0; i < ARM64_NCAPS; i++) { - const struct arm64_cpu_capabilities *caps = cpucap_ptrs[i]; - - if (caps && caps->cpus && caps->desc && - cpumask_any(caps->cpus) < nr_cpu_ids) - pr_info("detected: %s on CPU%*pbl\n", - caps->desc, cpumask_pr_args(caps->cpus)); - } } void __init setup_user_features(void) diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 1559c706d32d..bc9384517db3 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -1171,7 +1171,7 @@ void __init sve_setup(void) unsigned long b; int max_bit; - if (!cpus_have_cap(ARM64_SVE)) + if (!system_supports_sve()) return; /* @@ -1301,7 +1301,7 @@ void __init sme_setup(void) struct vl_info *info = &vl_info[ARM64_VEC_SME]; int min_bit, max_bit; - if (!cpus_have_cap(ARM64_SME)) + if (!system_supports_sme()) return; /* diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index defbab84e9e5..85384dc9a89d 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -439,9 +439,8 @@ static void __init hyp_mode_check(void) void __init smp_cpus_done(unsigned int max_cpus) { pr_info("SMP: Total of %d processors activated.\n", num_online_cpus()); - setup_system_features(); hyp_mode_check(); - apply_alternatives_all(); + setup_system_features(); setup_user_features(); mark_linear_text_alias_ro(); } |