wuxinyue a2438700e4 virtio-devices: support event idx for virtio-blk
Support event idx feature for virtio-blk device.
This feature could improve disk IO performance by suppressing
notifications from guest to host and interrupts from host to
guest, which has been already supported in virtio-net and
vhost-user devices.

To achieve this, virtqueue's event-idx-related API is
leveraged for avail_event field update and needs_notification
check.

Fixes: #6580
Signed-off-by: wuxinyue <wuxinyue.wxy@antgroup.com>
2024-07-23 14:16:34 +00:00
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