bcm64: make the kernel use virtual timer counter register for cycles()

diff --git a/sys/src/9/bcm64/l.s b/sys/src/9/bcm64/l.s
index 86035d6bb891e91e2427d18b3579743744c6adad..1e9bdb2176b3a6931357693cc1acd3738abe968a 100644 (file)
--- a/sys/src/9/bcm64/l.s
+++ b/sys/src/9/bcm64/l.s
@@ -298,6 +298,9 @@ _goodnight:
        RETURN
 
 TEXT vcycles(SB), 1, $-4
+       MRS     CNTVCT_EL0, R0
+       RETURN
+
 TEXT lcycles(SB), 1, $-4
        MRS     PMCCNTR_EL0, R0
        RETURN