D30603.diff
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	diff --git a/lib/libpmc/libpmc_pmu_util.c b/lib/libpmc/libpmc_pmu_util.c
	--- a/lib/libpmc/libpmc_pmu_util.c
	+++ b/lib/libpmc/libpmc_pmu_util.c
	@@ -2,6 +2,10 @@
	* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
	*
	* Copyright (c) 2018, Matthew Macy
	+ * Copyright (c) 2021, The FreeBSD Foundation
	+ *
	+ * Portions of this software were developed by Mitchell Horne
	+ * under sponsorship from the FreeBSD Foundation.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	@@ -139,6 +143,24 @@
	return (name);
	}

	+#elif defined(__aarch64__)
	+
	+static struct pmu_alias pmu_armv8_alias_table[] = {
	+ {NULL, NULL},
	+};
	+
	+static const char *
	+pmu_alias_get(const char *name)
	+{
	+ struct pmu_alias *pa;
	+
	+ for (pa = pmu_armv8_alias_table; pa->pa_alias != NULL; pa++)
	+ if (strcasecmp(name, pa->pa_alias) == 0)
	+ return (pa->pa_name);
	+
	+ return (name);
	+}
	+
	#else

	static const char *
	@@ -549,6 +571,28 @@
	return (pmc_pmu_amd_pmcallocate(event_name, pm, &ped));
	}

	+#elif defined(__aarch64__)
	+
	+int
	+pmc_pmu_pmcallocate(const char event_name, struct pmc_op_pmcallocate pm)
	+{
	+ const struct pmu_event *pe;
	+ int idx = -1;
	+
	+ event_name = pmu_alias_get(event_name);
	+ if ((pe = pmu_event_get(NULL, event_name, &idx)) == NULL)
	+ return (ENOENT);
	+ if (pe->event == NULL)
	+ return (ENOENT);
	+
	+ assert(idx >= 0);
	+ pm->pm_md.pm_md_flags \|= PM_MD_RAW_EVENT;
	+ pm->pm_class = PMC_CLASS_ARMV8;
	+ pm->pm_caps \|= (PMC_CAP_READ \| PMC_CAP_WRITE);
	+
	+ return (0);
	+}
	+
	#else

	int