On 12/4/2023 12:53 PM, Tony Luck wrote:
Currently supported resctrl features are all domain scoped the same as the
scope of the L2 or L3 caches.
Add RESCTRL_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 node scoped.
Signed-off-by: Tony Luck<tony.luck@xxxxxxxxx>
Tested-by: Shaopeng Tan<tan.shaopeng@xxxxxxxxxxxxxx>
Reviewed-by: Peter Newman<peternewman@xxxxxxxxxx>
Reviewed-by: Reinette Chatre<reinette.chatre@xxxxxxxxx>
Reviewed-by: Shaopeng Tan<tan.shaopeng@xxxxxxxxxxxxxx>
Reviewed-by: Babu Moger <babu.moger@xxxxxxx>
---
include/linux/resctrl.h | 1 +
arch/x86/kernel/cpu/resctrl/core.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 058a940c3239..b8a3a11b970d 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -170,6 +170,7 @@ struct resctrl_schema;
enum resctrl_scope {
RESCTRL_L2_CACHE = 2,
RESCTRL_L3_CACHE = 3,
+ RESCTRL_NODE,
};
/**
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 797cb3bf417a..c9315ce8f7bd 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -502,6 +502,8 @@ 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_NODE:
+ return cpu_to_node(cpu);
default:
break;
}
