Linux Virtualization - Jan 2015 - [Qemu-devel] [PATCH RFC v6 05/20] virtio: support more feature bits

On Thu, Dec 11, 2014 at 02:25:07PM +0100, Cornelia Huck
wrote:
> With virtio-1, we support more than 32 feature bits. Let's extend both
> host and guest features to 64, which should suffice for a while.
> 
> vhost and migration have been ignored for now.
[snip]
> diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
> index f6c0379..08141c7 100644
> --- a/include/hw/virtio/virtio.h
> +++ b/include/hw/virtio/virtio.h
> @@ -55,6 +55,12 @@
>  /* A guest should never accept this.  It implies negotiation is broken. */
>  #define VIRTIO_F_BAD_FEATURE		30
>  
> +/* v1.0 compliant. */
> +#define VIRTIO_F_VERSION_1              32
This is already in the kernel header, isn't it?

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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On Thu, 22 Jan 2015 12:43:43 +1100
David Gibson <david at gibson.dropbear.id.au> wrote:
> On Thu, Dec 11, 2014 at 02:25:07PM +0100, Cornelia Huck wrote:
> > With virtio-1, we support more than 32 feature bits. Let's extend
both
> > host and guest features to 64, which should suffice for a while.
> > 
> > vhost and migration have been ignored for now.
> 
> [snip]
> 
> > diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
> > index f6c0379..08141c7 100644
> > --- a/include/hw/virtio/virtio.h
> > +++ b/include/hw/virtio/virtio.h
> > @@ -55,6 +55,12 @@
> >  /* A guest should never accept this.  It implies negotiation is
broken. */
> >  #define VIRTIO_F_BAD_FEATURE		30
> >  
> > +/* v1.0 compliant. */
> > +#define VIRTIO_F_VERSION_1              32
> 
> This is already in the kernel header, isn't it?
> 
Yes. But nearly all files include this header but not the kernel
header.

On Wed, Jan 28, 2015 at 04:59:45PM +0100, Cornelia Huck
wrote:
> On Thu, 22 Jan 2015 12:43:43 +1100
> David Gibson <david at gibson.dropbear.id.au> wrote:
> 
> > On Thu, Dec 11, 2014 at 02:25:07PM +0100, Cornelia Huck wrote:
> > > With virtio-1, we support more than 32 feature bits. Let's
extend both
> > > host and guest features to 64, which should suffice for a while.
> > > 
> > > vhost and migration have been ignored for now.
> > 
> > [snip]
> > 
> > > diff --git a/include/hw/virtio/virtio.h
b/include/hw/virtio/virtio.h
> > > index f6c0379..08141c7 100644
> > > --- a/include/hw/virtio/virtio.h
> > > +++ b/include/hw/virtio/virtio.h
> > > @@ -55,6 +55,12 @@
> > >  /* A guest should never accept this.  It implies negotiation is
broken. */
> > >  #define VIRTIO_F_BAD_FEATURE		30
> > >  
> > > +/* v1.0 compliant. */
> > > +#define VIRTIO_F_VERSION_1              32
> > 
> > This is already in the kernel header, isn't it?
> 
> Yes. But nearly all files include this header but not the kernel
> header.
Can't you change that?  Or this file include the kernel header?

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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