From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [RFC V2] virtio: Add platform specific DMA API translation for virito devices Date: Tue, 5 Jun 2018 04:25:37 +0300 Message-ID: <20180605042229-mutt-send-email-mst__23268.8935626813$1528161844$gmane$org@kernel.org> References: <20180522063317.20956-1-khandual@linux.vnet.ibm.com> <20180523213703-mutt-send-email-mst@kernel.org> <20180604153558-mutt-send-email-mst@kernel.org> <20180604184035-mutt-send-email-mst@kernel.org> <6164442a718645a754879eac5c4c5fad9283c211.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: <6164442a718645a754879eac5c4c5fad9283c211.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: robh@kernel.org, mpe@ellerman.id.au, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, hch@infradead.org, joe@perches.com, david@gibson.dropbear.id.au, linuxppc-dev@lists.ozlabs.org, elfring@users.sourceforge.net, Anshuman Khandual List-Id: virtualization@lists.linuxfoundation.org On Tue, Jun 05, 2018 at 09:26:56AM +1000, Benjamin Herrenschmidt wrote: > I would like to keep however the ability to bypass the iommu for > performance reasons So that's easy, clear the IOMMU flag and this means "bypass the IOMMU". -- MST