The following commit has been merged into the x86/cache branch of tip:
Commit-ID: 1a171608ee8d40d22d604303e42f033c69151123
Gitweb: https://git.kernel.org/tip/1a171608ee8d40d22d604303e42f033c69151123
Author: Tony Luck <tony.luck@xxxxxxxxx>
AuthorDate: Fri, 28 Jun 2024 14:56:05 -07:00
Committer: Borislav Petkov (AMD) <bp@xxxxxxxxx>
CommitterDate: Tue, 02 Jul 2024 19:49:54 +02:00
x86/resctrl: Add node-scope to the options for feature scope
Currently supported resctrl features are all domain scoped the same as the
scope of the L2 or L3 caches.
Add RESCTRL_L3_NODE as a new option for features that are scoped at the
same granularity as NUMA nodes. This is needed for Intel's Sub-NUMA
Cluster (SNC) feature where monitoring features are divided between
nodes that share an L3 cache.
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Reviewed-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Tested-by: Babu Moger <babu.moger@xxxxxxx>
Link: https://lore.kernel.org/r/20240628215619.76401-6-tony.luck@xxxxxxxxx
---
arch/x86/kernel/cpu/resctrl/core.c | 2 ++
include/linux/resctrl.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index b4f2be7..b86c525 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -510,6 +510,8 @@ static int get_domain_id_from_scope(int cpu, enum resctrl_scope scope)
case RESCTRL_L2_CACHE:
case RESCTRL_L3_CACHE:
return get_cpu_cacheinfo_id(cpu, scope);
+ case RESCTRL_L3_NODE:
+ return cpu_to_node(cpu);
default:
break;
}
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index aa2c22a..64b6ad1 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -176,6 +176,7 @@ struct resctrl_schema;
enum resctrl_scope {
RESCTRL_L2_CACHE = 2,
RESCTRL_L3_CACHE = 3,
+ RESCTRL_L3_NODE,
};
/**
|