linux-kernel - [PATCH v2 05/16] x86/resctrl: Add and initialize rdt

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Message-ID: <20250321231609.57418-6-tony.luck@intel.com>
Date: Fri, 21 Mar 2025 16:15:55 -0700
From: Tony Luck <tony.luck@...el.com>
To: Fenghua Yu <fenghuay@...dia.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: linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev,
	Tony Luck <tony.luck@...el.com>
Subject: [PATCH v2 05/16] x86/resctrl: Add and initialize rdt_resource for package scope core monitor

New resource for monitoring core events reported at package level.

Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 include/linux/resctrl.h            |  1 +
 include/linux/resctrl_types.h      |  1 +
 fs/resctrl/internal.h              |  2 ++
 arch/x86/kernel/cpu/resctrl/core.c | 11 +++++++++++
 fs/resctrl/rdtgroup.c              |  2 ++
 5 files changed, 17 insertions(+)

diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 25c3ee78de3d..6c895ec220fe 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -233,6 +233,7 @@ enum resctrl_scope {
 	RESCTRL_L2_CACHE = 2,
 	RESCTRL_L3_CACHE = 3,
 	RESCTRL_L3_NODE,
+	RESCTRL_PACKAGE,
 };
 
 /**
diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h
index a7faf2cd5406..8f967e03af5a 100644
--- a/include/linux/resctrl_types.h
+++ b/include/linux/resctrl_types.h
@@ -39,6 +39,7 @@ enum resctrl_res_level {
 	RDT_RESOURCE_L2,
 	RDT_RESOURCE_MBA,
 	RDT_RESOURCE_SMBA,
+	RDT_RESOURCE_INTEL_AET,
 
 	/* Must be the last */
 	RDT_NUM_RESOURCES,
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h
index ec3863d18f68..3a100007301d 100644
--- a/fs/resctrl/internal.h
+++ b/fs/resctrl/internal.h
@@ -240,6 +240,8 @@ struct rdtgroup {
 
 #define RFTYPE_DEBUG			BIT(10)
 
+#define RFTYPE_RES_PKG			BIT(11)
+
 #define RFTYPE_CTRL_INFO		(RFTYPE_INFO | RFTYPE_CTRL)
 
 #define RFTYPE_MON_INFO			(RFTYPE_INFO | RFTYPE_MON)
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index c316268b4442..c8cc3104f56c 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -99,6 +99,15 @@ struct rdt_hw_resource rdt_resources_all[RDT_NUM_RESOURCES] = {
 			.schema_fmt		= RESCTRL_SCHEMA_RANGE,
 		},
 	},
+	[RDT_RESOURCE_INTEL_AET] =
+	{
+		.r_resctrl = {
+			.rid			= RDT_RESOURCE_INTEL_AET,
+			.name			= "PKG",
+			.mon_scope		= RESCTRL_PACKAGE,
+			.mon_domains		= mon_domain_init(RDT_RESOURCE_INTEL_AET),
+		},
+	},
 };
 
 u32 resctrl_arch_system_num_rmid_idx(void)
@@ -430,6 +439,8 @@ static int get_domain_id_from_scope(int cpu, enum resctrl_scope scope)
 		return get_cpu_cacheinfo_id(cpu, scope);
 	case RESCTRL_L3_NODE:
 		return cpu_to_node(cpu);
+	case RESCTRL_PACKAGE:
+		return topology_physical_package_id(cpu);
 	default:
 		break;
 	}
diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c
index dbfb7d3bc3bc..a90291f57330 100644
--- a/fs/resctrl/rdtgroup.c
+++ b/fs/resctrl/rdtgroup.c
@@ -2179,6 +2179,8 @@ static unsigned long fflags_from_resource(struct rdt_resource *r)
 	case RDT_RESOURCE_MBA:
 	case RDT_RESOURCE_SMBA:
 		return RFTYPE_RES_MB;
+	case RDT_RESOURCE_INTEL_AET:
+		return RFTYPE_RES_PKG;
 	}
 
 	return WARN_ON_ONCE(1);
-- 
2.48.1