diff options
Diffstat (limited to 'arch/powerpc/mm/numa.c')
| -rw-r--r-- | arch/powerpc/mm/numa.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index dfebca905acb..b725fb66e913 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -1247,6 +1247,26 @@ int find_and_online_cpu_nid(int cpu) int cpu_to_coregroup_id(int cpu) { + __be32 associativity[VPHN_ASSOC_BUFSIZE] = {0}; + int index; + + if (cpu < 0 || cpu > nr_cpu_ids) + return -1; + + if (!coregroup_enabled) + goto out; + + if (!firmware_has_feature(FW_FEATURE_VPHN)) + goto out; + + if (vphn_get_associativity(cpu, associativity)) + goto out; + + index = of_read_number(associativity, 1); + if (index > min_common_depth + 1) + return of_read_number(&associativity[index - 1], 1); + +out: return cpu_to_core_id(cpu); } |