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virtio-blk: add iothread-vq-mapping parameter

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Add the iothread-vq-mapping parameter to assign virtqueues to IOThreads.
Store the vq:AioContext mapping in the new struct
VirtIOBlockDataPlane->vq_aio_context[] field and refactor the code to
use the per-vq AioContext instead of the BlockDriverState's AioContext.

Reimplement --device virtio-blk-pci,iothread= and non-IOThread mode by
assigning all virtqueues to the IOThread and main loop's AioContext in
vq_aio_context[], respectively.

The comment in struct VirtIOBlockDataPlane about EventNotifiers is
stale. Remove it.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-ID: <20231220134755.814917-5-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-12-20 08:47:55 -05:00 • committed by Kevin Wolf
parent cf03a152c5
commit b6948ab01d
4 changed files with 202 additions and 50 deletions
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2
include/hw/virtio/virtio-blk.h
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@ -21,6 +21,7 @@
#include "sysemu/block-backend.h"
#include "sysemu/block-ram-registrar.h"
#include "qom/object.h"
#include "qapi/qapi-types-virtio.h"
#define TYPE_VIRTIO_BLK "virtio-blk-device"
OBJECT_DECLARE_SIMPLE_TYPE(VirtIOBlock, VIRTIO_BLK)
@ -37,6 +38,7 @@ struct VirtIOBlkConf
{
BlockConf conf;
IOThread *iothread;
IOThreadVirtQueueMappingList *iothread_vq_mapping_list;
char *serial;
uint32_t request_merging;
uint16_t num_queues;