diff mbox series

[v9,5/8] x86/resctrl: Add node-scope to the options for feature scope

Message ID 20231020213100.123598-6-tony.luck@intel.com
State New
Headers
Series Add support for Sub-NUMA cluster (SNC) systems |

Commit Message

Luck, Tony Oct. 20, 2023, 9:30 p.m. UTC 
  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.

Reviewed-by: Peter Newman <peternewman@google.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
No changes since v6 except to add Peter's review tag

 include/linux/resctrl.h            | 1 +
 arch/x86/kernel/cpu/resctrl/core.c | 2 ++
 2 files changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 4778ef71c893..683706355810 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -172,6 +172,7 @@  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 bcc4bd2e1930..2c3975c9c20c 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -515,6 +515,8 @@  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;
 	}