diff options
Diffstat (limited to 'arch/mips/kernel/smp.c')
| -rw-r--r-- | arch/mips/kernel/smp.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index f9d01e953acb..f95f094f36e4 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -72,7 +72,7 @@ EXPORT_SYMBOL(cpu_core_map); * A logcal cpu mask containing only one VPE per core to * reduce the number of IPIs on large MT systems. */ -cpumask_t cpu_foreign_map __read_mostly; +cpumask_t cpu_foreign_map[NR_CPUS] __read_mostly; EXPORT_SYMBOL(cpu_foreign_map); /* representing cpus for which sibling maps can be computed */ @@ -124,7 +124,7 @@ static inline void set_cpu_core_map(int cpu) * Calculate a new cpu_foreign_map mask whenever a * new cpu appears or disappears. */ -static inline void calculate_cpu_foreign_map(void) +void calculate_cpu_foreign_map(void) { int i, k, core_present; cpumask_t temp_foreign_map; @@ -141,7 +141,9 @@ static inline void calculate_cpu_foreign_map(void) cpumask_set_cpu(i, &temp_foreign_map); } - cpumask_copy(&cpu_foreign_map, &temp_foreign_map); + for_each_online_cpu(i) + cpumask_andnot(&cpu_foreign_map[i], + &temp_foreign_map, &cpu_sibling_map[i]); } struct plat_smp_ops *mp_ops; @@ -344,16 +346,9 @@ asmlinkage void start_secondary(void) static void stop_this_cpu(void *dummy) { /* - * Remove this CPU. Be a bit slow here and - * set the bits for every online CPU so we don't miss - * any IPI whilst taking this VPE down. + * Remove this CPU: */ - cpumask_copy(&cpu_foreign_map, cpu_online_mask); - - /* Make it visible to every other CPU */ - smp_mb(); - set_cpu_online(smp_processor_id(), false); calculate_cpu_foreign_map(); local_irq_disable(); @@ -512,10 +507,17 @@ void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned l smp_on_other_tlbs(flush_tlb_range_ipi, &fd); } else { unsigned int cpu; + int exec = vma->vm_flags & VM_EXEC; for_each_online_cpu(cpu) { + /* + * flush_cache_range() will only fully flush icache if + * the VMA is executable, otherwise we must invalidate + * ASID without it appearing to has_valid_asid() as if + * mm has been completely unused by that CPU. + */ if (cpu != smp_processor_id() && cpu_context(cpu, mm)) - cpu_context(cpu, mm) = 0; + cpu_context(cpu, mm) = !exec; } } local_flush_tlb_range(vma, start, end); @@ -560,8 +562,14 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long page) unsigned int cpu; for_each_online_cpu(cpu) { + /* + * flush_cache_page() only does partial flushes, so + * invalidate ASID without it appearing to + * has_valid_asid() as if mm has been completely unused + * by that CPU. + */ if (cpu != smp_processor_id() && cpu_context(cpu, vma->vm_mm)) - cpu_context(cpu, vma->vm_mm) = 0; + cpu_context(cpu, vma->vm_mm) = 1; } } local_flush_tlb_page(vma, page); |