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block/blkio: Add virtio-blk-vfio-pci BlockDriver

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libblkio 1.1.0 [1] introduces a virtio-blk-vfio-pci driver, which
accesses a virtio-blk PCI device using VFIO. Add a corresponding
BlockDriver.

[1] https://gitlab.com/libblkio/libblkio/-/tree/v1.1.0

Signed-off-by: Alberto Faria <afaria@redhat.com>
Message-id: 20221028131635.710267-1-afaria@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Alberto Faria 2022-10-28 14:16:35 +01:00 committed by Stefan Hajnoczi
parent 7208429223
commit 03d9e4c0db
2 changed files with 26 additions and 0 deletions
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8
block/blkio.c
View File

@ -25,6 +25,7 @@
*/
#define DRIVER_IO_URING "io_uring"
#define DRIVER_NVME_IO_URING "nvme-io_uring"
#define DRIVER_VIRTIO_BLK_VFIO_PCI "virtio-blk-vfio-pci"
#define DRIVER_VIRTIO_BLK_VHOST_USER "virtio-blk-vhost-user"
#define DRIVER_VIRTIO_BLK_VHOST_VDPA "virtio-blk-vhost-vdpa"
@ -704,6 +705,8 @@ static int blkio_file_open(BlockDriverState *bs, QDict *options, int flags,
ret = blkio_io_uring_open(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_NVME_IO_URING) == 0) {
ret = blkio_nvme_io_uring(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_VIRTIO_BLK_VFIO_PCI) == 0) {
ret = blkio_virtio_blk_common_open(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_VIRTIO_BLK_VHOST_USER) == 0) {
ret = blkio_virtio_blk_common_open(bs, options, flags, errp);
} else if (strcmp(blkio_driver, DRIVER_VIRTIO_BLK_VHOST_VDPA) == 0) {
@ -989,6 +992,10 @@ static BlockDriver bdrv_nvme_io_uring = BLKIO_DRIVER(
.bdrv_needs_filename = true,
);
static BlockDriver bdrv_virtio_blk_vfio_pci = BLKIO_DRIVER(
DRIVER_VIRTIO_BLK_VFIO_PCI
);
static BlockDriver bdrv_virtio_blk_vhost_user = BLKIO_DRIVER(
DRIVER_VIRTIO_BLK_VHOST_USER
);
@ -1001,6 +1008,7 @@ static void bdrv_blkio_init(void)
{
bdrv_register(&bdrv_io_uring);
bdrv_register(&bdrv_nvme_io_uring);
bdrv_register(&bdrv_virtio_blk_vfio_pci);
bdrv_register(&bdrv_virtio_blk_vhost_user);
bdrv_register(&bdrv_virtio_blk_vhost_vdpa);
}

18
qapi/block-core.json
View File

@ -2960,6 +2960,7 @@
'raw', 'rbd',
{ 'name': 'replication', 'if': 'CONFIG_REPLICATION' },
'ssh', 'throttle', 'vdi', 'vhdx',
{ 'name': 'virtio-blk-vfio-pci', 'if': 'CONFIG_BLKIO' },
{ 'name': 'virtio-blk-vhost-user', 'if': 'CONFIG_BLKIO' },
{ 'name': 'virtio-blk-vhost-vdpa', 'if': 'CONFIG_BLKIO' },
'vmdk', 'vpc', 'vvfat' ] }
@ -3711,6 +3712,20 @@
'data': { 'filename': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsVirtioBlkVfioPci:
#
# Driver specific block device options for the virtio-blk-vfio-pci backend.
#
# @path: path to the PCI device's sysfs directory (e.g.
# /sys/bus/pci/devices/0000:00:01.0).
#
# Since: 7.2
##
{ 'struct': 'BlockdevOptionsVirtioBlkVfioPci',
'data': { 'path': 'str' },
'if': 'CONFIG_BLKIO' }
##
# @BlockdevOptionsVirtioBlkVhostUser:
#
@ -4390,6 +4405,9 @@
'throttle': 'BlockdevOptionsThrottle',
'vdi': 'BlockdevOptionsGenericFormat',
'vhdx': 'BlockdevOptionsGenericFormat',
'virtio-blk-vfio-pci':
{ 'type': 'BlockdevOptionsVirtioBlkVfioPci',
'if': 'CONFIG_BLKIO' },
'virtio-blk-vhost-user':
{ 'type': 'BlockdevOptionsVirtioBlkVhostUser',
'if': 'CONFIG_BLKIO' },