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Tsirkin" , Marcel Apfelbaum , Richard Henderson , Eduardo Habkost , Jason Wang , Marcelo Tosatti , qemu-block@nongnu.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Bernhard Beschow , Joel Upham Subject: [PATCH v3 06/28] hw/xen: take iothread mutex in xen_evtchn_reset_op() Date: Wed, 25 Oct 2023 15:50:20 +0100 Message-Id: <20231025145042.627381-7-dwmw2@infradead.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231025145042.627381-1-dwmw2@infradead.org> References: <20231025145042.627381-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: David Woodhouse X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-ZohoMail-DKIM: pass (identity @infradead.org) X-ZM-MESSAGEID: 1698245485630100003 Content-Type: text/plain; charset="utf-8" From: David Woodhouse 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 Reviewed-by: Paul Durrant --- 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; } =20 + QEMU_IOTHREAD_LOCK_GUARD(); return xen_evtchn_soft_reset(); } =20 --=20 2.40.1