From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46425) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cVUCK-0007R4-1H for qemu-devel@nongnu.org; Sun, 22 Jan 2017 21:17:33 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cVUCG-0004at-2s for qemu-devel@nongnu.org; Sun, 22 Jan 2017 21:17:32 -0500 Received: from mx1.redhat.com ([209.132.183.28]:38314) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1cVUCF-0004al-TQ for qemu-devel@nongnu.org; Sun, 22 Jan 2017 21:17:28 -0500 References: <1484917736-32056-1-git-send-email-peterx@redhat.com> <1484917736-32056-19-git-send-email-peterx@redhat.com> From: Jason Wang Message-ID: Date: Mon, 23 Jan 2017 10:17:19 +0800 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] [PATCH RFC v4 18/20] intel_iommu: enable vfio devices List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Xu , qemu-devel@nongnu.org Cc: tianyu.lan@intel.com, kevin.tian@intel.com, mst@redhat.com, jan.kiszka@siemens.com, bd.aviv@gmail.com, alex.williamson@redhat.com On 2017=E5=B9=B401=E6=9C=8823=E6=97=A5 10:01, Jason Wang wrote: > On 2017=E5=B9=B401=E6=9C=8820=E6=97=A5 21:08, Peter Xu wrote: >> This patch is based on Aviv Ben-David ()'s patch >> upstream: >> >> "IOMMU: enable intel_iommu map and unmap notifiers" >> https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html >> >> However I removed/fixed some content, and added my own codes. >> >> Instead of translate() every page for iotlb invalidations (which is >> slower), we walk the pages when needed and notify in a hook function. >> >> This patch enables vfio devices for VT-d emulation. >> >> Signed-off-by: Peter Xu >> --- >> hw/i386/intel_iommu.c | 66=20 >> +++++++++++++++++++++++++++++++++++++------ >> include/hw/i386/intel_iommu.h | 8 ++++++ >> 2 files changed, 65 insertions(+), 9 deletions(-) > > A good side effect of this patch is that it makes vhost device IOTLB=20 > works without ATS (though may be slow). We probably need a better=20 > title :) Probably something like "remote IOMMU/IOTLB" support. Thanks