[PATCH v2] x86,fs/resctrl: Add event group descriptions for Intel Diamond Rapids

[PATCH v2] x86,fs/resctrl: Add event group descriptions for Intel Diamond Rapids

[Tony Luck]

Intel Diamond Rapids exposes Application Energy Telemetry through two
new PMT aggregator GUIDs: one covering the "energy" feature, and one
covering the "perf" feature, both documented in the Intel-PMT XML
repository [1].

The "perf" aggregator references two events not previously enumerated
by resctrl: retired instructions (INST_RETIRED), and a count of
unhalted core clock cycles perceived by hardware as contributing to
instruction execution (PCNT).

Add definitions for both aggregators, and add the two new events to
the resctrl filesystem so they can be exposed to user space.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://github.com/intel/Intel-PMT # [1]
---
v2:
	Reinette kindly wrote a much better commit message.
	Code unchanged.

 include/linux/resctrl_types.h           |  2 ++
 arch/x86/kernel/cpu/resctrl/intel_aet.c | 34 +++++++++++++++++++++++++
 fs/resctrl/monitor.c                    |  2 ++
 3 files changed, 38 insertions(+)

diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h
index a5f56faa18d2..e2e2cf3d9ff6 100644
--- a/include/linux/resctrl_types.h
+++ b/include/linux/resctrl_types.h
@@ -60,6 +60,8 @@ enum resctrl_event_id {
 	PMT_EVENT_AUTO_C6_RES,
 	PMT_EVENT_UNHALTED_REF_CYCLES,
 	PMT_EVENT_UOPS_RETIRED,
+	PMT_EVENT_INST_RETIRED,
+	PMT_EVENT_PCNT,
 
 	/* Must be the last */
 	QOS_NUM_EVENTS,
diff --git a/arch/x86/kernel/cpu/resctrl/intel_aet.c b/arch/x86/kernel/cpu/resctrl/intel_aet.c
index c22c3cf5167d..3555b0aa33ce 100644
--- a/arch/x86/kernel/cpu/resctrl/intel_aet.c
+++ b/arch/x86/kernel/cpu/resctrl/intel_aet.c
@@ -125,9 +125,43 @@ static struct event_group perf_0x26557651 = {
 	}
 };
 
+/*
+ * Link: https://github.com/intel/Intel-PMT/blob/main/xml/DMR/OOBMSM/RMID-ENERGY/dmr_aggregator.xml
+ */
+static struct event_group energy_0x47903099 = {
+	.pfname		= "energy",
+	.guid		= 0x47903099,
+	.num_rmid	= 256,
+	.mmio_size	= XML_MMIO_SIZE(256, 2, 3),
+	.num_events	= 2,
+	.evts		= {
+		EVT(PMT_EVENT_ENERGY, 0, 18),
+		EVT(PMT_EVENT_ACTIVITY, 1, 18),
+	}
+};
+
+/*
+ * Link: https://github.com/intel/Intel-PMT/blob/main/xml/DMR/OOBMSM/RMID-PERF/dmr_aggregator.xml
+ */
+static struct event_group perf_0x1415910A = {
+	.pfname		= "perf",
+	.guid		= 0x1415910A,
+	.num_rmid	= 256,
+	.mmio_size	= XML_MMIO_SIZE(256, 4, 3),
+	.num_events	= 4,
+	.evts		= {
+		EVT(PMT_EVENT_UNHALTED_REF_CYCLES, 0, 0),
+		EVT(PMT_EVENT_UNHALTED_CORE_CYCLES, 1, 0),
+		EVT(PMT_EVENT_INST_RETIRED, 2, 0),
+		EVT(PMT_EVENT_PCNT, 3, 0),
+	}
+};
+
 static struct event_group *known_event_groups[] = {
 	&energy_0x26696143,
+	&energy_0x47903099,
 	&perf_0x26557651,
+	&perf_0x1415910A,
 };
 
 #define for_each_event_group(_peg)						\
diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c
index 73413cb128ea..04e4ea612b7c 100644
--- a/fs/resctrl/monitor.c
+++ b/fs/resctrl/monitor.c
@@ -1041,6 +1041,8 @@ struct mon_evt mon_event_all[QOS_NUM_EVENTS] = {
 	MON_EVENT(PMT_EVENT_AUTO_C6_RES,		"c6_res",		RDT_RESOURCE_PERF_PKG,	false),
 	MON_EVENT(PMT_EVENT_UNHALTED_REF_CYCLES,	"unhalted_ref_cycles",	RDT_RESOURCE_PERF_PKG,	false),
 	MON_EVENT(PMT_EVENT_UOPS_RETIRED,		"uops_retired",		RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_INST_RETIRED,		"inst_retired",		RDT_RESOURCE_PERF_PKG,	false),
+	MON_EVENT(PMT_EVENT_PCNT,			"pcnt",			RDT_RESOURCE_PERF_PKG,	false),
 };
 
 bool resctrl_enable_mon_event(enum resctrl_event_id eventid, bool any_cpu,
-- 
2.55.0