Re: [Qemu-devel] [PATCH v4 11/11] virtio: CLI and provide packed ring feature bit by default

[Jason Wang]

On 2019/2/19 下午7:23, Wei Xu wrote:
> On Tue, Feb 19, 2019 at 03:32:19PM +0800, Jason Wang wrote:
> > On 2019/2/14 下午12:26,address@hidden  wrote:
> > > From: Wei Xu<address@hidden>
> > >
> > > Add userspace and vhost kernel/user support.
> > >
> > > Add CLI "ring_packed=true/false" to enable/disable packed ring provision.
> > > Usage:
> > >      -device virtio-net-pci,netdev=xx,mac=xx:xx:xx:xx:xx:xx,ring_packed=false
> > >
> > > By default it is provided.
> > Please compat this for old machine types.
> It is provided by default, how to make it compatible for old machine types?
> Hide or provide it?
>
> Wei

Take a look at e.g how pc_compat_3_1 and hw_compat_3_1 was used.

Thanks