qemu/hw/virtio
Changpeng Liu 00343e4b54 vhost-user-blk: introduce a new vhost-user-blk host device
This commit introduces a new vhost-user device for block, it uses a
chardev to connect with the backend, same with Qemu virito-blk device,
Guest OS still uses the virtio-blk frontend driver.

To use it, start QEMU with command line like this:

qemu-system-x86_64 \
    -chardev socket,id=char0,path=/path/vhost.socket \
    -device vhost-user-blk-pci,chardev=char0,num-queues=2, \
            bootindex=2... \

Users can use different parameters for `num-queues` and `bootindex`.

Different with exist Qemu virtio-blk host device, it makes more easy
for users to implement their own I/O processing logic, such as all
user space I/O stack against hardware block device. It uses the new
vhost messages(VHOST_USER_GET_CONFIG) to get block virtio config
information from backend process.

Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-01-18 21:52:37 +02:00
..
Makefile.objs stubs: move vhost stubs to stubs/vhost.o 2017-01-16 17:52:35 +01:00
trace-events trace-events: fix code style: print 0x before hex numbers 2017-08-01 12:13:07 +01:00
vhost-backend.c vhost: fix a memory leak 2017-08-02 00:13:25 +03:00
vhost-stub.c stubs: move vhost stubs to stubs/vhost.o 2017-01-16 17:52:35 +01:00
vhost-user.c vhost-user: add new vhost user messages to support virtio config space 2018-01-18 21:52:37 +02:00
vhost-vsock.c hw: use "qemu/osdep.h" as first #include in source files 2017-12-18 17:07:02 +03:00
vhost.c vhost-user: add new vhost user messages to support virtio config space 2018-01-18 21:52:37 +02:00
virtio-balloon.c hw/virtio-balloon: remove old i386 dependency 2017-12-18 17:07:02 +03:00
virtio-bus.c virtio: Fix error handling in virtio_bus_device_plugged 2017-03-22 17:54:32 +02:00
virtio-crypto-pci.c virtio-crypto: Convert to DEFINE_PROP_LINK 2017-07-14 12:04:43 +02:00
virtio-crypto.c virtio-crypto: Convert to DEFINE_PROP_LINK 2017-07-14 12:04:43 +02:00
virtio-mmio.c virtio-mmio: switch to linux headers 2017-01-18 22:59:53 +02:00
virtio-pci.c vhost-user-blk: introduce a new vhost-user-blk host device 2018-01-18 21:52:37 +02:00
virtio-pci.h vhost-user-blk: introduce a new vhost-user-blk host device 2018-01-18 21:52:37 +02:00
virtio-rng.c virtio-rng: Convert to DEFINE_PROP_LINK 2017-07-14 12:04:42 +02:00
virtio.c virtio_error: don't invoke status callbacks 2017-12-19 23:41:00 +02:00