diff options
Diffstat (limited to 'arch/arm64/kernel/smp.c')
-rw-r--r-- | arch/arm64/kernel/smp.c | 37 |
1 files changed, 27 insertions, 10 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 50fb4696654e..2bbdc0e4fd14 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -52,6 +52,7 @@ #include <asm/sections.h> #include <asm/tlbflush.h> #include <asm/ptrace.h> +#include <asm/virt.h> #define CREATE_TRACE_POINTS #include <trace/events/ipi.h> @@ -141,22 +142,27 @@ asmlinkage void secondary_start_kernel(void) */ atomic_inc(&mm->mm_count); current->active_mm = mm; - cpumask_set_cpu(cpu, mm_cpumask(mm)); set_my_cpu_offset(per_cpu_offset(smp_processor_id())); - printk("CPU%u: Booted secondary processor\n", cpu); /* * TTBR0 is only used for the identity mapping at this stage. Make it * point to zero page to avoid speculatively fetching new entries. */ cpu_set_reserved_ttbr0(); - flush_tlb_all(); + local_flush_tlb_all(); cpu_set_default_tcr_t0sz(); preempt_disable(); trace_hardirqs_off(); + /* + * If the system has established the capabilities, make sure + * this CPU ticks all of those. If it doesn't, the CPU will + * fail to come online. + */ + verify_local_cpu_capabilities(); + if (cpu_ops[cpu]->cpu_postboot) cpu_ops[cpu]->cpu_postboot(); @@ -177,6 +183,8 @@ asmlinkage void secondary_start_kernel(void) * the CPU migration code to notice that the CPU is online * before we continue. */ + pr_info("CPU%u: Booted secondary processor [%08x]\n", + cpu, read_cpuid_id()); set_cpu_online(cpu, true); complete(&cpu_running); @@ -231,12 +239,7 @@ int __cpu_disable(void) /* * OK - migrate IRQs away from this CPU */ - migrate_irqs(); - - /* - * Remove this CPU from the vm mask set of all processes. - */ - clear_tasks_mm_cpumask(cpu); + irq_migrate_all_off_this_cpu(); return 0; } @@ -310,14 +313,28 @@ void cpu_die(void) } #endif +static void __init hyp_mode_check(void) +{ + if (is_hyp_mode_available()) + pr_info("CPU: All CPU(s) started at EL2\n"); + else if (is_hyp_mode_mismatched()) + WARN_TAINT(1, TAINT_CPU_OUT_OF_SPEC, + "CPU: CPUs started in inconsistent modes"); + else + pr_info("CPU: All CPU(s) started at EL1\n"); +} + void __init smp_cpus_done(unsigned int max_cpus) { pr_info("SMP: Total of %d processors activated.\n", num_online_cpus()); - do_post_cpus_up_work(); + setup_cpu_features(); + hyp_mode_check(); + apply_alternatives_all(); } void __init smp_prepare_boot_cpu(void) { + cpuinfo_store_boot_cpu(); set_my_cpu_offset(per_cpu_offset(smp_processor_id())); } |