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hw/xen: Add evtchn operations to allow redirection to internal emulation

Browse source 
The existing implementation calling into the real libxenevtchn moves to
a new file hw/xen/xen-operations.c, and is called via a function table
which in a subsequent commit will also be able to invoke the emulated
event channel support.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2023-01-01 17:54:41 +00:00
parent 831b0db8ab
commit b6cacfea0b
13 changed files with 242 additions and 57 deletions
Download patch file Download diff file Expand all files Collapse all files

12
hw/xen/xen_pvdev.c
View file

@ -238,14 +238,14 @@ void xen_pv_evtchn_event(void *opaque)
struct XenLegacyDevice *xendev = opaque;
evtchn_port_t port;
port = xenevtchn_pending(xendev->evtchndev);
port = qemu_xen_evtchn_pending(xendev->evtchndev);
if (port != xendev->local_port) {
xen_pv_printf(xendev, 0,
"xenevtchn_pending returned %d (expected %d)\n",
port, xendev->local_port);
return;
}
xenevtchn_unmask(xendev->evtchndev, port);
qemu_xen_evtchn_unmask(xendev->evtchndev, port);
if (xendev->ops->event) {
xendev->ops->event(xendev);
@ -257,15 +257,15 @@ void xen_pv_unbind_evtchn(struct XenLegacyDevice *xendev)
if (xendev->local_port == -1) {
return;
}
qemu_set_fd_handler(xenevtchn_fd(xendev->evtchndev), NULL, NULL, NULL);
xenevtchn_unbind(xendev->evtchndev, xendev->local_port);
qemu_set_fd_handler(qemu_xen_evtchn_fd(xendev->evtchndev), NULL, NULL, NULL);
qemu_xen_evtchn_unbind(xendev->evtchndev, xendev->local_port);
xen_pv_printf(xendev, 2, "unbind evtchn port %d\n", xendev->local_port);
xendev->local_port = -1;
}
int xen_pv_send_notify(struct XenLegacyDevice *xendev)
{
return xenevtchn_notify(xendev->evtchndev, xendev->local_port);
return qemu_xen_evtchn_notify(xendev->evtchndev, xendev->local_port);
}
/* ------------------------------------------------------------- */
@ -306,7 +306,7 @@ void xen_pv_del_xendev(struct XenLegacyDevice *xendev)
}
if (xendev->evtchndev != NULL) {
xenevtchn_close(xendev->evtchndev);
qemu_xen_evtchn_close(xendev->evtchndev);
}
if (xendev->gnttabdev != NULL) {
xengnttab_close(xendev->gnttabdev);