diff --git a/proxyclient/m1n1/hv.py b/proxyclient/m1n1/hv.py
index 4b5bdc2d..2327fa2c 100644
--- a/proxyclient/m1n1/hv.py
+++ b/proxyclient/m1n1/hv.py
@@ -546,7 +546,6 @@ class HV(Reloadable):
         }
         ro = {
             ACC_CFG_EL1,
-            CYC_OVRD_EL1,
             ACC_OVRD_EL1,
         }
         value = 0
diff --git a/src/hv_exc.c b/src/hv_exc.c
index 7d7158fa..e125d4ef 100644
--- a/src/hv_exc.c
+++ b/src/hv_exc.c
@@ -166,6 +166,10 @@ static bool hv_handle_msr(u64 *regs, u64 iss)
         SYSREG_PASS(SYS_IMP_APL_PMC7)
         SYSREG_PASS(SYS_IMP_APL_PMC8)
         SYSREG_PASS(SYS_IMP_APL_PMC9)
+        /* Handle this one here because m1n1/Linux (will) use it for explicit cpuidle.
+         * We can pass it through; going into deep sleep doesn't break the HV since we
+         * don't do any wfis that assume otherwise in m1n1. */
+        SYSREG_PASS(SYS_IMP_APL_CYC_OVRD)
         /* IPI handling */
         SYSREG_PASS(SYS_IMP_APL_IPI_RR_LOCAL_EL1)
         SYSREG_PASS(SYS_IMP_APL_IPI_RR_GLOBAL_EL1)