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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> |
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| .. | ||
| ci | ||
| coccinelle | ||
| codeconverter | ||
| coverity-scan | ||
| kvm | ||
| modules | ||
| oss-fuzz | ||
| performance | ||
| qapi | ||
| qemu-guest-agent | ||
| qemugdb | ||
| qmp | ||
| simplebench | ||
| tracetool | ||
| analyse-9p-simpletrace.py | ||
| analyse-locks-simpletrace.py | ||
| analyze-inclusions | ||
| analyze-migration.py | ||
| archive-source.sh | ||
| block-coroutine-wrapper.py | ||
| check_sparse.py | ||
| checkpatch.pl | ||
| clean-header-guards.pl | ||
| clean-includes | ||
| cleanup-trace-events.pl | ||
| cocci-macro-file.h | ||
| cpu-x86-uarch-abi.py | ||
| decodetree.py | ||
| device-crash-test | ||
| disas-objdump.pl | ||
| dump-guest-memory.py | ||
| entitlement.sh | ||
| extract-vsssdk-headers | ||
| feature_to_c.sh | ||
| fix-multiline-comments.sh | ||
| gensyscalls.sh | ||
| get_maintainer.pl | ||
| git-submodule.sh | ||
| git.orderfile | ||
| hxtool | ||
| kernel-doc | ||
| main.c | ||
| make-config-poison.sh | ||
| make-release | ||
| meson-buildoptions.py | ||
| meson-buildoptions.sh | ||
| meson.build | ||
| minikconf.py | ||
| modinfo-collect.py | ||
| modinfo-generate.py | ||
| mtest2make.py | ||
| nsis.py | ||
| qapi-gen.py | ||
| qemu-binfmt-conf.sh | ||
| qemu-gdb.py | ||
| qemu-stamp.py | ||
| qemu-trace-stap | ||
| qemu-version.sh | ||
| refresh-pxe-roms.sh | ||
| render_block_graph.py | ||
| replay-dump.py | ||
| shaderinclude.pl | ||
| signrom.py | ||
| simpletrace.py | ||
| symlink-install-tree.py | ||
| test-driver.py | ||
| tracetool.py | ||
| u2f-setup-gen.py | ||
| undefsym.py | ||
| update-linux-headers.sh | ||
| update-mips-syscall-args.sh | ||
| update-syscalltbl.sh | ||
| userfaultfd-wrlat.py | ||
| vmstate-static-checker.py | ||
| xen-detect.c | ||