d1b4259f1a
Currently, devices are plugged before features are negotiated. If the backend doesn't support VIRTIO_F_VERSION_1, the transport needs to rewind some settings. This is the case for CCW, for which a post_plugged callback had been introduced, where max_rev field is just updated if VIRTIO_F_VERSION_1 is not supported by the backend. For PCI, implementing post_plugged would be much more complicated, so it needs to know whether the backend supports VIRTIO_F_VERSION_1 at plug time. Currently, nothing is done for PCI. Modern capabilities get exposed to the guest even if VIRTIO_F_VERSION_1 is not supported by the backend, which confuses the guest. This patch replaces existing post_plugged solution with an approach that fits with both transports. Features negotiation is performed before ->device_plugged() call. A pre_plugged callback is introduced so that the transports can set their supported features. Cc: Michael S. Tsirkin <mst@redhat.com> Cc: qemu-stable@nongnu.org Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com> [ccw] Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com> |
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| .. | ||
| Makefile.objs | ||
| trace-events | ||
| vhost-backend.c | ||
| vhost-user.c | ||
| vhost-vsock.c | ||
| vhost.c | ||
| virtio-balloon.c | ||
| virtio-bus.c | ||
| virtio-mmio.c | ||
| virtio-pci.c | ||
| virtio-pci.h | ||
| virtio-rng.c | ||
| virtio.c | ||