[libvirt] [PATCH v2 10/25] qemu: capabilities: Add virtio/vhost {non-}transitional

[Ján Tomko]

On Wed, Jan 23, 2019 at 04:32:38PM -0500, Cole Robinson wrote:
>This adds QEMU_CAPS flags for the following devices
>
>    virtio-blk-pci-transitional
>    virtio-blk-pci-non-transitional
>    virtio-net-pci-transitional
>    virtio-net-pci-non-transitional
>    vhost-scsi-pci-transitional
>    vhost-scsi-pci-non-transitional
>    virtio-rng-pci-transitional
>    virtio-rng-pci-non-transitional
>    virtio-9p-pci-transitional
>    virtio-9p-pci-non-transitional
>    virtio-balloon-pci-transitional
>    virtio-balloon-pci-non-transitional
>    vhost-vsock-pci-transitional
>    vhost-vsock-pci-non-transitional
>    virtio-input-host-pci-transitional
>    virtio-input-host-pci-non-transitional
>    virtio-scsi-pci-transitional
>    virtio-scsi-pci-non-transitional
>    virtio-serial-pci-transitional
>    virtio-serial-pci-non-transitional
>
>Signed-off-by: Cole Robinson <crobinso at redhat.com>
>---
> src/qemu/qemu_capabilities.c                  | 48 +++++++++++++++++++
> src/qemu/qemu_capabilities.h                  | 28 +++++++++++
> .../caps_4.0.0.x86_64.xml                     | 20 ++++++++
> 3 files changed, 96 insertions(+)

This seems excessive, is there a plan to retire the transitional
devices? I don't expect anyone creating a QEMU build that e.g.:
a) supports virtio-rng-pci-transitional but not virtio-rng-pci-non-transitional
b) supports virtio-scsi-pci-transitional but not virtio-input-host-pci-transitional

For the disable-legacy property, we only have
QEMU_CAPS_VIRTIO_PCI_DISABLE_LEGACY, that is checked on multiple (but
not all possible) PCI devices.

Jano
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