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Re: [Qemu-devel] [PATCH 3/6] virtio-pci: fix 1.0 virtqueue migration
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [PATCH 3/6] virtio-pci: fix 1.0 virtqueue migration |
Date: |
Fri, 21 Aug 2015 11:43:59 +0200 |
On Fri, 21 Aug 2015 17:05:47 +0800
Jason Wang <address@hidden> wrote:
> diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
> index 788b556..c971ba2 100644
> --- a/hw/virtio/virtio.c
> +++ b/hw/virtio/virtio.c
> @@ -1056,6 +1056,17 @@ static bool virtio_virtqueue_needed(void *opaque)
> return virtio_host_has_feature(vdev, VIRTIO_F_VERSION_1);
> }
>
> +static bool virtio_modern_state_needed(void *opaque)
> +{
> + VirtIODevice *vdev = opaque;
> + BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
> + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
> +
> + return virtio_virtqueue_needed(opaque) &&
Why does core want to check that? Shouldn't that be done by the class
instead (but see below)?
> + k->has_modern_state &&
> + k->has_modern_state(qbus->parent);
> +}
I don't really like this "modern_state" stuff (which is pci specific)
creeping into core.
How about introducing "extra_state" and/or "extra_queue_state" (or
something like that) instead?
[Qemu-devel] [PATCH 4/6] virtio-pci: use wildcard mmio eventfd for 1.0 notification cap, Jason Wang, 2015/08/21
[Qemu-devel] [PATCH 5/6] virtio-pci: introduce pio notification capability for modern device, Jason Wang, 2015/08/21