From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 410Ddh2DfWzF1SC for ; Tue, 5 Jun 2018 11:25:42 +1000 (AEST) Date: Tue, 5 Jun 2018 04:25:37 +0300 From: "Michael S. Tsirkin" To: Benjamin Herrenschmidt Cc: Anshuman Khandual , virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, aik@ozlabs.ru, robh@kernel.org, joe@perches.com, elfring@users.sourceforge.net, david@gibson.dropbear.id.au, jasowang@redhat.com, mpe@ellerman.id.au, hch@infradead.org Subject: Re: [RFC V2] virtio: Add platform specific DMA API translation for virito devices Message-ID: <20180605042229-mutt-send-email-mst@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 In-Reply-To: <6164442a718645a754879eac5c4c5fad9283c211.camel@kernel.crashing.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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