linux-kernel - Re: [PATCH v2] vhost: drop vring dependency on iotlb

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Date:   Thu, 2 Apr 2020 12:27:09 -0400
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Jason Wang <jasowang@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org
Subject: Re: [PATCH v2] vhost: drop vring dependency on iotlb

On Thu, Apr 02, 2020 at 11:01:13PM +0800, Jason Wang wrote:
> 
> On 2020/4/2 下午10:46, Michael S. Tsirkin wrote:
> > vringh can now be built without IOTLB.
> > Select IOTLB directly where it's used.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > ---
> > 
> > Applies on top of my vhost tree.
> > Changes from v1:
> > 	VDPA_SIM needs VHOST_IOTLB
> 
> 
> It looks to me the patch is identical to v1.
> 
> Thanks


you are right. I squashed the description into
    virtio/test: fix up after IOTLB changes
take a look at it in the vhost tree.

> 
> > 
> >   drivers/vdpa/Kconfig  | 1 +
> >   drivers/vhost/Kconfig | 1 -
> >   2 files changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
> > index 7db1460104b7..08b615f2da39 100644
> > --- a/drivers/vdpa/Kconfig
> > +++ b/drivers/vdpa/Kconfig
> > @@ -17,6 +17,7 @@ config VDPA_SIM
> >   	depends on RUNTIME_TESTING_MENU
> >   	select VDPA
> >   	select VHOST_RING
> > +	select VHOST_IOTLB
> >   	default n
> >   	help
> >   	  vDPA networking device simulator which loop TX traffic back
> > diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
> > index f0404ce255d1..cb6b17323eb2 100644
> > --- a/drivers/vhost/Kconfig
> > +++ b/drivers/vhost/Kconfig
> > @@ -8,7 +8,6 @@ config VHOST_IOTLB
> >   config VHOST_RING
> >   	tristate
> > -	select VHOST_IOTLB
> >   	help
> >   	  This option is selected by any driver which needs to access
> >   	  the host side of a virtio ring.