[RFC PATCH v7bis 02/19] hw/xen: Add emulated evtchn ops

[David Woodhouse <dwmw2@infradead.org>]

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

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
 hw/i386/kvm/xen_evtchn.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index b23bb71abb..b571517b2c 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -30,6 +30,7 @@
 #include "hw/i386/pc.h"
 #include "hw/pci/pci.h"
 #include "hw/irq.h"
+#include "hw/xen/xen_backend_ops.h"
 
 #include "xen_evtchn.h"
 #include "xen_overlay.h"
@@ -198,6 +199,17 @@ static const TypeInfo xen_evtchn_info = {
     .class_init    = xen_evtchn_class_init,
 };
 
+static struct evtchn_backend_ops emu_evtchn_backend_ops = {
+    .open = xen_be_evtchn_open,
+    .bind_interdomain = xen_be_evtchn_bind_interdomain,
+    .unbind = xen_be_evtchn_unbind,
+    .close = xen_be_evtchn_close,
+    .get_fd = xen_be_evtchn_fd,
+    .notify = xen_be_evtchn_notify,
+    .unmask = xen_be_evtchn_unmask,
+    .pending = xen_be_evtchn_pending,
+};
+
 static void gsi_assert_bh(void *opaque)
 {
     struct vcpu_info *vi = kvm_xen_get_vcpu_info_hva(0);
@@ -220,6 +232,9 @@ void xen_evtchn_create(void)
     for (i = 0; i < GSI_NUM_PINS; i++) {
         sysbus_init_irq(SYS_BUS_DEVICE(s), &s->gsis[i]);
     }
+
+    /* Set event channel functions for backend drivers to use */
+    xen_evtchn_ops = &emu_evtchn_backend_ops;
 }
 
 void xen_evtchn_connect_gsis(qemu_irq *system_gsis)
-- 
2.39.0