linux-kernel - Re: [PATCH 1/4] vdpa: introduce config op to get valid iova range

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Date:   Thu, 6 Aug 2020 01:54:17 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, rob.miller@...adcom.com,
        lingshan.zhu@...el.com, eperezma@...hat.com, lulu@...hat.com,
        shahafs@...lanox.com, hanand@...inx.com, mhabets@...arflare.com,
        gdawar@...inx.com, saugatm@...inx.com, vmireyno@...vell.com,
        zhangweining@...jie.com.cn, eli@...lanox.com
Subject: Re: [PATCH 1/4] vdpa: introduce config op to get valid iova range

On Thu, Aug 06, 2020 at 11:25:11AM +0800, Jason Wang wrote:
> 
> On 2020/8/5 下午8:51, Michael S. Tsirkin wrote:
> > On Wed, Jun 17, 2020 at 11:29:44AM +0800, Jason Wang wrote:
> > > This patch introduce a config op to get valid iova range from the vDPA
> > > device.
> > > 
> > > Signed-off-by: Jason Wang<jasowang@...hat.com>
> > > ---
> > >   include/linux/vdpa.h | 14 ++++++++++++++
> > >   1 file changed, 14 insertions(+)
> > > 
> > > diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> > > index 239db794357c..b7633ed2500c 100644
> > > --- a/include/linux/vdpa.h
> > > +++ b/include/linux/vdpa.h
> > > @@ -41,6 +41,16 @@ struct vdpa_device {
> > >   	unsigned int index;
> > >   };
> > > +/**
> > > + * vDPA IOVA range - the IOVA range support by the device
> > > + * @start: start of the IOVA range
> > > + * @end: end of the IOVA range
> > > + */
> > > +struct vdpa_iova_range {
> > > +	u64 start;
> > > +	u64 end;
> > > +};
> > > +
> > This is ambiguous. Is end in the range or just behind it?
> 
> 
> In the range.

OK I guess we can treat it as a bugfix and merge after rc1,
but pls add a bit more in the commit log about what's
currently broken.

> 
> > How about first/last?
> 
> 
> Sure.
> 
> Thanks
> 
> 
> > 
> > 
> >