From: "Michael S. Tsirkin" Subject: Re: [RFC v2 2/4] iommu/arm-smmu-v3: Add tlbi_on_map option Date: Fri, 18 Aug 2017 05:54:26 +0300 Message-ID: <20170818055031-mutt-send-email-mst@kernel.org> References: <1502459130-6234-1-git-send-email-eric.auger@redhat.com> <1502459130-6234-3-git-send-email-eric.auger@redhat.com> <20170817163424.GC30719@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Auger Eric Cc: tn-nYOzD4b6Jr9Wk0Htik3J/w@public.gmane.org, Will Deacon , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Marc.Zyngier-5wv7dgnIgG8@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org List-Id: iommu@lists.linux-foundation.org On Thu, Aug 17, 2017 at 07:47:04PM +0200, Auger Eric wrote: > I will see with Peter and other potential users in the community whether > it is worth to pursue the efforts on upstreaming the QEMU vSMMUv3 > device, considering the VFIO/VHOST integration is made impossible. I posted more ideas on finding a way to support it after all separately. Even without this: 1. VHOST does not need to be notified on map. 2. VFIO might be possible for hardware that supports nested page tables. IMHO 2 is worth looking into. -- MST