[PATCH v3 06/28] hw/xen: take iothread mutex in xen_evtchn_reset_op()

David Woodhouse
2023-10-25T14:51:10Z

From: David Woodhouse <dwmw@amazon.co.uk>

The xen_evtchn_soft_reset() function requires the iothread mutex, but is
also called for the EVTCHNOP_reset hypercall. Ensure the mutex is taken
in that case.

Fixes: a15b10978fe6 ("hw/xen: Implement EVTCHNOP_reset")
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_evtchn.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index 3d6f4b4a0a..b2b4be9983 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -1135,6 +1135,7 @@ int xen_evtchn_reset_op(struct evtchn_reset *reset)
return -ESRCH;
}

+ QEMU_IOTHREAD_LOCK_GUARD();
return xen_evtchn_soft_reset();
}

--
2.40.1