From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH v3 0/3] virtio DMA API core stuff Date: Wed, 28 Oct 2015 13:23:11 +0200 Message-ID: <20151028132115-mutt-send-email-mst@redhat.com> References: <20151028091208-mutt-send-email-mst@redhat.com> <56307BD1.6010806@de.ibm.com> <1446021413.1856.28.camel@kernel.crashing.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1446021413.1856.28.camel@kernel.crashing.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Benjamin Herrenschmidt Cc: linux-s390 , Joerg Roedel , KVM , Sebastian Ott , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Christian Borntraeger , Andy Lutomirski , Paolo Bonzini , dwmw2@infradead.org, Christoph Hellwig , Martin Schwidefsky List-Id: virtualization@lists.linuxfoundation.org On Wed, Oct 28, 2015 at 05:36:53PM +0900, Benjamin Herrenschmidt wrote: > On Wed, 2015-10-28 at 16:40 +0900, Christian Borntraeger wrote: > > We have discussed that at kernel summit. I will try to implement a dummy dma_ops for > > s390 that does 1:1 mapping and Ben will look into doing some quirk to handle "old" > > code in addition to also make it possible to mark devices as iommu bypass (IIRC, > > via device tree, Ben?) > > Something like that yes. I'll look into it when I'm back home. > > Cheers, > Ben. OK so I guess that means we should prefer a transport-specific interface in virtio-pci then. -- MST