perf/x86/intel/uncore: Add events for Intel SPR IMC PMU

Add missing clockticks and cas_count_* events for Intel SapphireRapids IMC
PMU. These events are useful to measure memory bandwidth.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20230419214241.2310385-1-eranian@google.com

Author: Stephane Eranian

arch/x86/events/intel/uncore_snbep.c

@@ -6068,13 +6068,25 @@ static struct intel_uncore_ops spr_uncore_mmio_ops = {
 	.read_counter		= uncore_mmio_read_counter,
 };
 
+static struct uncore_event_desc spr_uncore_imc_events[] = {
+	INTEL_UNCORE_EVENT_DESC(clockticks,      "event=0x01,umask=0x00"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_read,  "event=0x05,umask=0xcf"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_read.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_read.unit, "MiB"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_write, "event=0x05,umask=0xf0"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_write.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(cas_count_write.unit, "MiB"),
+	{ /* end: all zeroes */ },
+};
+
 static struct intel_uncore_type spr_uncore_imc = {
 	SPR_UNCORE_COMMON_FORMAT(),
 	.name			= "imc",
 	.fixed_ctr_bits		= 48,
 	.fixed_ctr		= SNR_IMC_MMIO_PMON_FIXED_CTR,
 	.fixed_ctl		= SNR_IMC_MMIO_PMON_FIXED_CTL,
 	.ops			= &spr_uncore_mmio_ops,
+	.event_descs		= spr_uncore_imc_events,
 };
 
 static void spr_uncore_pci_enable_event(struct intel_uncore_box *box,