diff --git a/sys/arm64/arm64/locore.S b/sys/arm64/arm64/locore.S
--- a/sys/arm64/arm64/locore.S
+++ b/sys/arm64/arm64/locore.S
@@ -420,6 +420,11 @@
 	isb
 2:
 
+	/* Set CNTPOFF_EL2 if available */
+	CHECK_CPU_FEAT(x2, ID_AA64MMFR0, ECV, POFF, .Lno_feat_ecv_poff)
+	msr	CNTPOFF_EL2_REG, xzr
+.Lno_feat_ecv_poff:
+
 	/* Don't trap to EL2 for CP15 traps */
 	msr	hstr_el2, xzr