system/qemu
system/qemu
1
0
Fork 0
mirror of https://gitlab.com/qemu-project/qemu synced 2024-07-21 02:15:04 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

hw/xen: add get_frontend_path() method to XenDeviceClass

Browse source 
The primary Xen console is special. The guest's side is set up for it by
the toolstack automatically and not by the standard PV init sequence.

Accordingly, its *frontend* doesn't appear in …/device/console/0 either;
instead it appears under …/console in the guest's XenStore node.

To allow the Xen console driver to override the frontend path for the
primary console, add a method to the XenDeviceClass which can be used
instead of the standard xen_device_get_frontend_path()

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2023-10-14 16:53:23 +01:00
parent d3256f88d9
commit 523b6b3aba
2 changed files with 12 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
hw/xen/xen-bus.c
View file

@ -711,8 +711,17 @@ static void xen_device_frontend_create(XenDevice *xendev, Error **errp)
{
ERRP_GUARD();
XenBus *xenbus = XEN_BUS(qdev_get_parent_bus(DEVICE(xendev)));
XenDeviceClass *xendev_class = XEN_DEVICE_GET_CLASS(xendev);
xendev->frontend_path = xen_device_get_frontend_path(xendev);
if (xendev_class->get_frontend_path) {
xendev->frontend_path = xendev_class->get_frontend_path(xendev, errp);
if (!xendev->frontend_path) {
error_prepend(errp, "failed to create frontend: ");
return;
}
} else {
xendev->frontend_path = xen_device_get_frontend_path(xendev);
}
/*
* The frontend area may have already been created by a legacy

2
include/hw/xen/xen-bus.h
View file

@ -33,6 +33,7 @@ struct XenDevice {
};
typedef struct XenDevice XenDevice;
typedef char *(*XenDeviceGetFrontendPath)(XenDevice *xendev, Error **errp);
typedef char *(*XenDeviceGetName)(XenDevice *xendev, Error **errp);
typedef void (*XenDeviceRealize)(XenDevice *xendev, Error **errp);
typedef void (*XenDeviceFrontendChanged)(XenDevice *xendev,
@ -46,6 +47,7 @@ struct XenDeviceClass {
/*< public >*/
const char *backend;
const char *device;
XenDeviceGetFrontendPath get_frontend_path;
XenDeviceGetName get_name;
XenDeviceRealize realize;
XenDeviceFrontendChanged frontend_changed;