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-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index c105c533ed9..0bf12644aa7 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -747,6 +747,23 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
747static DEFINE_PER_CPU(struct _cpuid4_info *, ici_cpuid4_info); 747static DEFINE_PER_CPU(struct _cpuid4_info *, ici_cpuid4_info);
748#define CPUID4_INFO_IDX(x, y) (&((per_cpu(ici_cpuid4_info, x))[y])) 748#define CPUID4_INFO_IDX(x, y) (&((per_cpu(ici_cpuid4_info, x))[y]))
749 749
750/* returns CPUs that share the index cache with cpu */
751int get_shared_cpu_map(cpumask_var_t mask, unsigned int cpu, int index)
752{
753 int ret = 0;
754 struct _cpuid4_info *this_leaf;
755
756 if (index >= num_cache_leaves) {
757 index = num_cache_leaves - 1;
758 ret = index;
759 }
760
761 this_leaf = CPUID4_INFO_IDX(cpu,index);
762 cpumask_copy(mask, to_cpumask(this_leaf->shared_cpu_map));
763
764 return ret;
765}
766
750#ifdef CONFIG_SMP 767#ifdef CONFIG_SMP
751static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index) 768static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
752{ 769{