x86/resctrl: Support Sub-NUMA cluster mode SNC6

Support Sub-NUMA cluster mode with 6 nodes per L3 cache (SNC6) on some
Intel platforms.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/r/20241031220213.17991-1-tony.luck@intel.com

diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 851b561850e0c2311683c860c20943e46e70c544..5fcb3d635d915873173329fe40bd667f7a6ef49b 100644 (file)
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -1158,11 +1158,12 @@ static __init int snc_get_config(void)
 
        ret = cpus_per_l3 / cpus_per_node;
 
-       /* sanity check: Only valid results are 1, 2, 3, 4 */
+       /* sanity check: Only valid results are 1, 2, 3, 4, 6 */
        switch (ret) {
        case 1:
                break;
        case 2 ... 4:
+       case 6:
                pr_info("Sub-NUMA Cluster mode detected with %d nodes per L3 cache\n", ret);
                rdt_resources_all[RDT_RESOURCE_L3].r_resctrl.mon_scope = RESCTRL_L3_NODE;
                break;