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diff --git a/sys/arm64/include/armreg.h b/sys/arm64/include/armreg.h
--- a/sys/arm64/include/armreg.h
+++ b/sys/arm64/include/armreg.h
@@ -1340,7 +1340,7 @@
* PMEVCNTRn_EL0_op2 holds the lower 3 bits of 'n'
*/
-/* PMEVTYPER<n>_EL0 */
+/* PMEVTYPER<n>_EL0 - Performance Monitoring Event Type */
#define PMEVTYPER_EL0_op0 3
#define PMEVTYPER_EL0_op1 3
#define PMEVTYPER_EL0_CRn 14
@@ -1349,6 +1349,15 @@
* PMEVTYPERn_EL0_CRm[1:0] holds the upper 2 bits of 'n'
* PMEVTYPERn_EL0_op2 holds the lower 3 bits of 'n'
*/
+#define PMEVTYPER_EVTCOUNT_MASK 0x000003ff /* ARMv8.0 */
+#define PMEVTYPER_EVTCOUNT_8_1_MASK 0x0000ffff /* ARMv8.1+ */
+#define PMEVTYPER_MT (1 << 25) /* Multithreading */
+#define PMEVTYPER_M (1 << 26) /* Secure EL3 filtering */
+#define PMEVTYPER_NSH (1 << 27) /* Non-secure hypervisor filtering */
+#define PMEVTYPER_NSU (1 << 28) /* Non-secure user filtering */
+#define PMEVTYPER_NSK (1 << 29) /* Non-secure kernel filtering */
+#define PMEVTYPER_U (1 << 30) /* User filtering */
+#define PMEVTYPER_P (1 << 31) /* Privileged filtering */
/* PMINTENCLR_EL1 */
#define PMINTENCLR_EL1 MRS_REG(PMINTENCLR_EL1)

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