x86/cpu/amd: Derive L3 shared_cpu_map from cpu_llc_shared_mask

[sfrench/cifs-2.6.git] / arch / x86 / kernel / cpu / intel_cacheinfo.c

diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index c55fb2cb2acca8236741e94e2389aef35db424ff..24f749324c0f0f5d6f63b6810c71143f452d0fac 100644 (file)
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -811,7 +811,24 @@ static int __cache_amd_cpumap_setup(unsigned int cpu, int index,
        struct cacheinfo *this_leaf;
        int i, sibling;
 
-       if (boot_cpu_has(X86_FEATURE_TOPOEXT)) {
+       /*
+        * For L3, always use the pre-calculated cpu_llc_shared_mask
+        * to derive shared_cpu_map.
+        */
+       if (index == 3) {
+               for_each_cpu(i, cpu_llc_shared_mask(cpu)) {
+                       this_cpu_ci = get_cpu_cacheinfo(i);
+                       if (!this_cpu_ci->info_list)
+                               continue;
+                       this_leaf = this_cpu_ci->info_list + index;
+                       for_each_cpu(sibling, cpu_llc_shared_mask(cpu)) {
+                               if (!cpu_online(sibling))
+                                       continue;
+                               cpumask_set_cpu(sibling,
+                                               &this_leaf->shared_cpu_map);
+                       }
+               }
+       } else if (boot_cpu_has(X86_FEATURE_TOPOEXT)) {
                unsigned int apicid, nshared, first, last;
 
                this_leaf = this_cpu_ci->info_list + index;
@@ -839,19 +856,6 @@ static int __cache_amd_cpumap_setup(unsigned int cpu, int index,
                                                &this_leaf->shared_cpu_map);
                        }
                }
-       } else if (index == 3) {
-               for_each_cpu(i, cpu_llc_shared_mask(cpu)) {
-                       this_cpu_ci = get_cpu_cacheinfo(i);
-                       if (!this_cpu_ci->info_list)
-                               continue;
-                       this_leaf = this_cpu_ci->info_list + index;
-                       for_each_cpu(sibling, cpu_llc_shared_mask(cpu)) {
-                               if (!cpu_online(sibling))
-                                       continue;
-                               cpumask_set_cpu(sibling,
-                                               &this_leaf->shared_cpu_map);
-                       }
-               }
        } else
                return 0;