diff options
| author | Stefan Hajnoczi | 2022-10-13 20:58:57 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2022-10-26 20:56:42 +0200 |
| commit | fd66dbd424f5c90fcff3d27afed2c6c59d8be3ac (patch) | |
| tree | 9c18572891ca933ea37438d32b6e26733a6277d5 /meson_options.txt | |
| parent | coroutine: add flag to re-queue at front of CoQueue (diff) | |
| download | qemu-fd66dbd424f5c90fcff3d27afed2c6c59d8be3ac.tar.gz qemu-fd66dbd424f5c90fcff3d27afed2c6c59d8be3ac.tar.xz qemu-fd66dbd424f5c90fcff3d27afed2c6c59d8be3ac.zip | |
blkio: add libblkio block driver
libblkio (https://gitlab.com/libblkio/libblkio/) is a library for
high-performance disk I/O. It currently supports io_uring,
virtio-blk-vhost-user, and virtio-blk-vhost-vdpa with additional drivers
under development.
One of the reasons for developing libblkio is that other applications
besides QEMU can use it. This will be particularly useful for
virtio-blk-vhost-user which applications may wish to use for connecting
to qemu-storage-daemon.
libblkio also gives us an opportunity to develop in Rust behind a C API
that is easy to consume from QEMU.
This commit adds io_uring, nvme-io_uring, virtio-blk-vhost-user, and
virtio-blk-vhost-vdpa BlockDrivers to QEMU using libblkio. It will be
easy to add other libblkio drivers since they will share the majority of
code.
For now I/O buffers are copied through bounce buffers if the libblkio
driver requires it. Later commits add an optimization for
pre-registering guest RAM to avoid bounce buffers.
The syntax is:
--blockdev io_uring,node-name=drive0,filename=test.img,readonly=on|off,cache.direct=on|off
--blockdev nvme-io_uring,node-name=drive0,filename=/dev/ng0n1,readonly=on|off,cache.direct=on
--blockdev virtio-blk-vhost-vdpa,node-name=drive0,path=/dev/vdpa...,readonly=on|off,cache.direct=on
--blockdev virtio-blk-vhost-user,node-name=drive0,path=vhost-user-blk.sock,readonly=on|off,cache.direct=on
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20221013185908.1297568-3-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'meson_options.txt')
| -rw-r--r-- | meson_options.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/meson_options.txt b/meson_options.txt index 79c6af18d5..66128178bf 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -117,6 +117,8 @@ option('bzip2', type : 'feature', value : 'auto', description: 'bzip2 support for DMG images') option('cap_ng', type : 'feature', value : 'auto', description: 'cap_ng support') +option('blkio', type : 'feature', value : 'auto', + description: 'libblkio block device driver') option('bpf', type : 'feature', value : 'auto', description: 'eBPF support') option('cocoa', type : 'feature', value : 'auto', |