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Message-ID: <20241031220213.17991-1-tony.luck@intel.com>
Date: Thu, 31 Oct 2024 15:02:13 -0700
From: Tony Luck <tony.luck@...el.com>
To: Fenghua Yu <fenghua.yu@...el.com>,
Reinette Chatre <reinette.chatre@...el.com>,
Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
Peter Newman <peternewman@...gle.com>,
James Morse <james.morse@....com>,
Babu Moger <babu.moger@....com>,
Drew Fustini <dfustini@...libre.com>,
Dave Martin <Dave.Martin@....com>
Cc: Borislav Petkov <bp@...en8.de>,
x86@...nel.org,
linux-kernel@...r.kernel.org,
patches@...ts.linux.dev,
Tony Luck <tony.luck@...el.com>
Subject: [PATCH] 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@...el.com>
---
arch/x86/kernel/cpu/resctrl/monitor.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 851b561850e0..5fcb3d635d91 100644
--- 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;
--
2.47.0
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