1 files changed, 123 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/evsel.c b/tools/perf/arch/x86/util/evsel.c
new file mode 100644
index 000000000000..090d0f371891
--- /dev/null
+++ b/tools/perf/arch/x86/util/evsel.c
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <stdlib.h>
+#include "util/evsel.h"
+#include "util/env.h"
+#include "util/pmu.h"
+#include "util/pmus.h"
+#include "linux/string.h"
+#include "evsel.h"
+#include "util/debug.h"
+#include "env.h"
+
+#define IBS_FETCH_L3MISSONLY   (1ULL << 59)
+#define IBS_OP_L3MISSONLY      (1ULL << 16)
+
+void arch_evsel__set_sample_weight(struct evsel *evsel)
+{
+	evsel__set_sample_bit(evsel, WEIGHT_STRUCT);
+}
+
+/* Check whether the evsel's PMU supports the perf metrics */
+bool evsel__sys_has_perf_metrics(const struct evsel *evsel)
+{
+	const char *pmu_name = evsel->pmu_name ? evsel->pmu_name : "cpu";
+
+	/*
+	 * The PERF_TYPE_RAW type is the core PMU type, e.g., "cpu" PMU
+	 * on a non-hybrid machine, "cpu_core" PMU on a hybrid machine.
+	 * The slots event is only available for the core PMU, which
+	 * supports the perf metrics feature.
+	 * Checking both the PERF_TYPE_RAW type and the slots event
+	 * should be good enough to detect the perf metrics feature.
+	 */
+	if ((evsel->core.attr.type == PERF_TYPE_RAW) &&
+	    perf_pmus__have_event(pmu_name, "slots"))
+		return true;
+
+	return false;
+}
+
+bool arch_evsel__must_be_in_group(const struct evsel *evsel)
+{
+	if (!evsel__sys_has_perf_metrics(evsel) || !evsel->name ||
+	    strcasestr(evsel->name, "uops_retired.slots"))
+		return false;
+
+	return strcasestr(evsel->name, "topdown") || strcasestr(evsel->name, "slots");
+}
+
+int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size)
+{
+	u64 event = evsel->core.attr.config & PERF_HW_EVENT_MASK;
+	u64 pmu = evsel->core.attr.config >> PERF_PMU_TYPE_SHIFT;
+	const char *event_name;
+
+	if (event < PERF_COUNT_HW_MAX && evsel__hw_names[event])
+		event_name = evsel__hw_names[event];
+	else
+		event_name = "unknown-hardware";
+
+	/* The PMU type is not required for the non-hybrid platform. */
+	if (!pmu)
+		return  scnprintf(bf, size, "%s", event_name);
+
+	return scnprintf(bf, size, "%s/%s/",
+			 evsel->pmu_name ? evsel->pmu_name : "cpu",
+			 event_name);
+}
+
+static void ibs_l3miss_warn(void)
+{
+	pr_warning(
+"WARNING: Hw internally resets sampling period when L3 Miss Filtering is enabled\n"
+"and tagged operation does not cause L3 Miss. This causes sampling period skew.\n");
+}
+
+void arch__post_evsel_config(struct evsel *evsel, struct perf_event_attr *attr)
+{
+	struct perf_pmu *evsel_pmu, *ibs_fetch_pmu, *ibs_op_pmu;
+	static int warned_once;
+
+	if (warned_once || !x86__is_amd_cpu())
+		return;
+
+	evsel_pmu = evsel__find_pmu(evsel);
+	if (!evsel_pmu)
+		return;
+
+	ibs_fetch_pmu = perf_pmus__find("ibs_fetch");
+	ibs_op_pmu = perf_pmus__find("ibs_op");
+
+	if (ibs_fetch_pmu && ibs_fetch_pmu->type == evsel_pmu->type) {
+		if (attr->config & IBS_FETCH_L3MISSONLY) {
+			ibs_l3miss_warn();
+			warned_once = 1;
+		}
+	} else if (ibs_op_pmu && ibs_op_pmu->type == evsel_pmu->type) {
+		if (attr->config & IBS_OP_L3MISSONLY) {
+			ibs_l3miss_warn();
+			warned_once = 1;
+		}
+	}
+}
+
+int arch_evsel__open_strerror(struct evsel *evsel, char *msg, size_t size)
+{
+	if (!x86__is_amd_cpu())
+		return 0;
+
+	if (!evsel->core.attr.precise_ip &&
+	    !(evsel->pmu_name && !strncmp(evsel->pmu_name, "ibs", 3)))
+		return 0;
+
+	/* More verbose IBS errors. */
+	if (evsel->core.attr.exclude_kernel || evsel->core.attr.exclude_user ||
+	    evsel->core.attr.exclude_hv || evsel->core.attr.exclude_idle ||
+	    evsel->core.attr.exclude_host || evsel->core.attr.exclude_guest) {
+		return scnprintf(msg, size, "AMD IBS doesn't support privilege filtering. Try "
+				 "again without the privilege modifiers (like 'k') at the end.");
+	}
+
+	return 0;
+}