Commit 1a171608 authored by Tony Luck's avatar Tony Luck Committed by Borislav Petkov (AMD)
Browse files

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: default avatarTony Luck <tony.luck@intel.com>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Tested-by: default avatarBabu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20240628215619.76401-6-tony.luck@intel.com
parent cae2bcb6

arch/x86/kernel/cpu/resctrl/core.c

+2 −0
Original line number Diff line number Diff line
@@ -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;

	}

include/linux/resctrl.h

+1 −0
Original line number Diff line number Diff line
@@ -176,6 +176,7 @@ struct resctrl_schema; 
enum resctrl_scope {

	RESCTRL_L2_CACHE = 2,

	RESCTRL_L3_CACHE = 3,

	RESCTRL_L3_NODE,

};



/**