From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39440) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1f6B6s-0002p1-S6 for qemu-devel@nongnu.org; Wed, 11 Apr 2018 04:28:12 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1f6B6o-00076n-UM for qemu-devel@nongnu.org; Wed, 11 Apr 2018 04:28:06 -0400 Received: from mga02.intel.com ([134.134.136.20]:14089) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1f6B6o-00075i-KN for qemu-devel@nongnu.org; Wed, 11 Apr 2018 04:28:02 -0400 Date: Wed, 11 Apr 2018 16:25:56 +0800 From: Tiwei Bie Message-ID: <20180411082556.3hjaubnnw3hbpnp3@debian> References: <20180411072027.5656-1-tiwei.bie@intel.com> <20180411080036.GD13887@xz-mi> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20180411080036.GD13887@xz-mi> Subject: Re: [Qemu-devel] [RFC] vhost-user: introduce F_NEED_ALL_IOTLB protocol feature List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Xu Cc: mst@redhat.com, jasowang@redhat.com, qemu-devel@nongnu.org, dan.daly@intel.com, cunming.liang@intel.com, zhihong.wang@intel.com Hi Peter, On Wed, Apr 11, 2018 at 04:00:36PM +0800, Peter Xu wrote: > On Wed, Apr 11, 2018 at 03:20:27PM +0800, Tiwei Bie wrote: > > [...] > > > This is just a RFC for now. It seems that, it doesn't work > > as expected when guest is using kernel driver (To handle > > this case, it seems that some RAM regions' events also need > > to be listened). Any comments would be appreciated! Thanks! > > Hi, Tiwei, > > What's your kernel command line in the guest? Is iommu=pt there? Yeah, you are right! The related things in kernel command line are: iommu=pt intel_iommu=on Hmm, how will this param affect vIOMMU's behaviour?.. Best regards, Tiwei Bie > > -- > Peter Xu