v2: * Add libvhost-user VHOST_USER_GET_FEATURES patch to start reporting feature bits correctly (already reviewed by Marc-André Lureau) * Rephrase doc comments and drop vhost_get_default_features() [Jason] * Simplify hw/core/machine.c compat props by setting packed=off on the virtio-dev base class [Jason]
The VIRTIO 1.1 packed virtqueue layout improves performance and guest driver support has been available since Linux v5.0. virtio-blk benchmarks show it is beneficial for non-net devices too so I wrote patches to enable it for all devices. It turned out to be trickier than I expected because vhost feature negotiation is currently not ready for new virtqueue feature bits like VIRTIO_F_RING_PACKED. Patch 1 fixes libqos. Patch 2 fixes libvhost-user. Patch 3 adds clarifications to the vhost-user specification. Patches 4-6 solve the vhost feature issues in QEMU. Finally, Patch 6 enables packed virtqueues. Stefan Hajnoczi (7): tests/libqos: mask out VIRTIO_F_RING_PACKED for now libvhost-user: advertise vring features docs: document non-net VHOST_USER_GET_FEATURES behavior vhost: involve device backends in feature negotiation vhost-user-blk: add VIRTIO_F_RING_PACKED feature bit vhost-scsi: add VIRTIO_F_VERSION_1 and VIRTIO_F_RING_PACKED virtio: enable VIRTIO_F_RING_PACKED for all devices include/hw/virtio/vhost.h | 1 + include/hw/virtio/virtio-gpu.h | 2 ++ include/hw/virtio/virtio.h | 2 +- include/sysemu/cryptodev-vhost.h | 11 +++++++++++ backends/cryptodev-vhost.c | 21 +++++++++++++++++++++ contrib/libvhost-user/libvhost-user.c | 10 ++++++++++ contrib/vhost-user-blk/vhost-user-blk.c | 4 +--- hw/block/vhost-user-blk.c | 1 + hw/core/machine.c | 4 +++- hw/display/vhost-user-gpu.c | 18 ++++++++++++++++++ hw/display/virtio-gpu-base.c | 2 +- hw/input/vhost-user-input.c | 11 +++++++++++ hw/scsi/vhost-scsi.c | 2 ++ hw/scsi/vhost-user-scsi.c | 2 ++ hw/virtio/vhost-user-fs.c | 6 ++++-- hw/virtio/vhost-vsock.c | 7 +++++-- hw/virtio/vhost.c | 24 ++++++++++++++++++++++++ hw/virtio/virtio-crypto.c | 3 ++- tests/qtest/libqos/virtio.c | 3 ++- docs/interop/vhost-user.rst | 21 +++++++++++++++++++++ 20 files changed, 143 insertions(+), 12 deletions(-) -- 2.26.2
