a4eef0711b
Automatically size the number of request virtqueues to match the number of vCPUs. This ensures that completion interrupts are handled on the same vCPU that submitted the request. No IPI is necessary to complete an I/O request and performance is improved. The maximum number of MSI-X vectors and virtqueues limit are respected. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com> Message-Id: <20200818143348.310613-8-stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
|
|
* vhost-user-blk host device
|
|
* Copyright(C) 2017 Intel Corporation.
|
|
*
|
|
* Authors:
|
|
* Changpeng Liu <changpeng.liu@intel.com>
|
|
*
|
|
* Based on vhost-scsi.h, Copyright IBM, Corp. 2011
|
|
*
|
|
* 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_USER_BLK_H
|
|
#define VHOST_USER_BLK_H
|
|
|
|
#include "standard-headers/linux/virtio_blk.h"
|
|
#include "hw/block/block.h"
|
|
#include "chardev/char-fe.h"
|
|
#include "hw/virtio/vhost.h"
|
|
#include "hw/virtio/vhost-user.h"
|
|
|
|
#define TYPE_VHOST_USER_BLK "vhost-user-blk"
|
|
#define VHOST_USER_BLK(obj) \
|
|
OBJECT_CHECK(VHostUserBlk, (obj), TYPE_VHOST_USER_BLK)
|
|
|
|
#define VHOST_USER_BLK_AUTO_NUM_QUEUES UINT16_MAX
|
|
|
|
typedef struct VHostUserBlk {
|
|
VirtIODevice parent_obj;
|
|
CharBackend chardev;
|
|
int32_t bootindex;
|
|
struct virtio_blk_config blkcfg;
|
|
uint16_t num_queues;
|
|
uint32_t queue_size;
|
|
uint32_t config_wce;
|
|
struct vhost_dev dev;
|
|
struct vhost_inflight *inflight;
|
|
VhostUserState vhost_user;
|
|
struct vhost_virtqueue *vhost_vqs;
|
|
VirtQueue **virtqs;
|
|
bool connected;
|
|
} VHostUserBlk;
|
|
|
|
#endif
|