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vdpa: add vdpa-dev support

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Supports vdpa-dev, we can use the deivce directly:

-M microvm -m 512m -smp 2 -kernel ... -initrd ... -device \
vhost-vdpa-device,vhostdev=/dev/vhost-vdpa-x

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221215134944.2809-3-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Longpeng 2022-12-15 21:49:41 +08:00 • committed by Michael S. Tsirkin
parent 2273324540
commit b430a2bd23
4 changed files with 425 additions and 0 deletions
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43
include/hw/virtio/vdpa-dev.h Normal file
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/*
* Vhost Vdpa Device
*
* Copyright (c) Huawei Technologies Co., Ltd. 2022. All Rights Reserved.
*
* Authors:
* Longpeng <longpeng2@huawei.com>
*
* Largely based on the "vhost-user-blk.h" implemented by:
* Changpeng Liu <changpeng.liu@intel.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#ifndef _VHOST_VDPA_DEVICE_H
#define _VHOST_VDPA_DEVICE_H
#include "hw/virtio/vhost.h"
#include "hw/virtio/vhost-vdpa.h"
#include "qom/object.h"
#define TYPE_VHOST_VDPA_DEVICE "vhost-vdpa-device"
OBJECT_DECLARE_SIMPLE_TYPE(VhostVdpaDevice, VHOST_VDPA_DEVICE)
struct VhostVdpaDevice {
VirtIODevice parent_obj;
char *vhostdev;
int vhostfd;
int32_t bootindex;
uint32_t vdev_id;
uint32_t num_queues;
struct vhost_dev dev;
struct vhost_vdpa vdpa;
VirtQueue **virtqs;
uint8_t *config;
int config_size;
uint16_t queue_size;
bool started;
int (*post_init)(VhostVdpaDevice *v, Error **errp);
};
#endif