motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

xen: introduce 'xen-block', 'xen-disk' and 'xen-cdrom'

Browse source 
This patch adds new XenDevice-s: 'xen-disk' and 'xen-cdrom', both derived
from a common 'xen-block' parent type. These will eventually replace the
'xen_disk' (note the underscore rather than hyphen) legacy PV backend but
it is illustrative to build up the implementation incrementally, along with
the XenBus/XenDevice framework. Subsequent patches will therefore add to
these devices' implementation as new features are added to the framework.

After this patch has been applied it is possible to instantiate new
'xen-disk' or 'xen-cdrom' devices with a single 'vdev' parameter, which
accepts values adhering to the Xen VBD naming scheme [1]. For example, a
command-line instantiation of a xen-disk can be done with an argument
similar to the following:

-device xen-disk,vdev=hda

The implementation of the vdev parameter formulates the appropriate VBD
number for use in the PV protocol.

[1] https://xenbits.xen.org/docs/unstable/man/xen-vbd-interface.7.html

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Anthony Perard <anthony.perard@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
This commit is contained in:
Paul Durrant 2019-01-08 14:48:48 +00:00 • committed by Anthony PERARD
parent 108f7bba15
commit 1a72d9ae31
5 changed files with 426 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

73
include/hw/xen/xen-block.h Normal file
View file

@ -0,0 +1,73 @@
/*
* Copyright (c) 2018 Citrix Systems Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_XEN_BLOCK_H
#define HW_XEN_BLOCK_H
#include "hw/xen/xen-bus.h"
typedef enum XenBlockVdevType {
XEN_BLOCK_VDEV_TYPE_INVALID,
XEN_BLOCK_VDEV_TYPE_DP,
XEN_BLOCK_VDEV_TYPE_XVD,
XEN_BLOCK_VDEV_TYPE_HD,
XEN_BLOCK_VDEV_TYPE_SD,
XEN_BLOCK_VDEV_TYPE__MAX
} XenBlockVdevType;
typedef struct XenBlockVdev {
XenBlockVdevType type;
unsigned long disk;
unsigned long partition;
unsigned long number;
} XenBlockVdev;
typedef struct XenBlockProperties {
XenBlockVdev vdev;
} XenBlockProperties;
typedef struct XenBlockDevice {
XenDevice xendev;
XenBlockProperties props;
} XenBlockDevice;
typedef void (*XenBlockDeviceRealize)(XenBlockDevice *blockdev, Error **errp);
typedef void (*XenBlockDeviceUnrealize)(XenBlockDevice *blockdev, Error **errp);
typedef struct XenBlockDeviceClass {
/*< private >*/
XenDeviceClass parent_class;
/*< public >*/
XenBlockDeviceRealize realize;
XenBlockDeviceUnrealize unrealize;
} XenBlockDeviceClass;
#define TYPE_XEN_BLOCK_DEVICE "xen-block"
#define XEN_BLOCK_DEVICE(obj) \
OBJECT_CHECK(XenBlockDevice, (obj), TYPE_XEN_BLOCK_DEVICE)
#define XEN_BLOCK_DEVICE_CLASS(class) \
OBJECT_CLASS_CHECK(XenBlockDeviceClass, (class), TYPE_XEN_BLOCK_DEVICE)
#define XEN_BLOCK_DEVICE_GET_CLASS(obj) \
OBJECT_GET_CLASS(XenBlockDeviceClass, (obj), TYPE_XEN_BLOCK_DEVICE)
typedef struct XenDiskDevice {
XenBlockDevice blockdev;
} XenDiskDevice;
#define TYPE_XEN_DISK_DEVICE "xen-disk"
#define XEN_DISK_DEVICE(obj) \
OBJECT_CHECK(XenDiskDevice, (obj), TYPE_XEN_DISK_DEVICE)
typedef struct XenCDRomDevice {
XenBlockDevice blockdev;
} XenCDRomDevice;
#define TYPE_XEN_CDROM_DEVICE "xen-cdrom"
#define XEN_CDROM_DEVICE(obj) \
OBJECT_CHECK(XenCDRomDevice, (obj), TYPE_XEN_CDROM_DEVICE)
#endif /* HW_XEN_BLOCK_H */