[PATCH v3 20/26] x86/resctrl: Add and initialize rdt_resource for package scope core monitor

[Tony Luck]

Counts for each Intel telemetry event are periodically sent to one or
more aggregators on each package where accumulated totals are made
available in MMIO registers.

Add a new resource for monitoring these events with code to build
domains at the package granularity.

Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
 include/linux/resctrl.h            |  1 +
 arch/x86/kernel/cpu/resctrl/core.c | 11 +++++++++++
 2 files changed, 12 insertions(+)

diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 25f51a57b0b7..c03e7dc1f009 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -232,6 +232,7 @@ enum resctrl_scope {
 	RESCTRL_L2_CACHE = 2,
 	RESCTRL_L3_CACHE = 3,
 	RESCTRL_L3_NODE,
+	RESCTRL_PACKAGE,
 };
 
 /**
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index f0f256a5ac66..9578d9c7260c 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_PERF_PKG] =
+	{
+		.r_resctrl = {
+			.rid			= RDT_RESOURCE_PERF_PKG,
+			.name			= "PERF_PKG",
+			.mon_scope		= RESCTRL_PACKAGE,
+			.mon_domains		= mon_domain_init(RDT_RESOURCE_PERF_PKG),
+		},
+	},
 };
 
 u32 resctrl_arch_system_num_rmid_idx(void)
@@ -431,6 +440,8 @@ 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;
 	}
-- 
2.48.1