From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56530) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fnh7P-0004fq-Hb for qemu-devel@nongnu.org; Thu, 09 Aug 2018 05:20:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fnh7M-0000Za-10 for qemu-devel@nongnu.org; Thu, 09 Aug 2018 05:20:31 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:58358 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fnh7L-0000Wu-IB for qemu-devel@nongnu.org; Thu, 09 Aug 2018 05:20:27 -0400 Date: Thu, 9 Aug 2018 12:20:23 +0300 From: "Michael S. Tsirkin" Message-ID: <20180809121649-mutt-send-email-mst@kernel.org> References: <20180807193125.30378-1-alex.williamson@redhat.com> <20180807224033-mutt-send-email-mst@kernel.org> <20180807135303.3938b3a2@t450s.home> <20180808004929-mutt-send-email-mst@kernel.org> <20180808034543.GC24415@xz-mi> <20180808162304.42d3fecc@t450s.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180808162304.42d3fecc@t450s.home> Subject: Re: [Qemu-devel] [PATCH v3 0/4] Balloon inhibit enhancements, vfio restriction List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alex Williamson Cc: Peter Xu , qemu-devel@nongnu.org, Cornelia Huck , kvm@vger.kernel.org, david@redhat.com On Wed, Aug 08, 2018 at 04:23:04PM -0600, Alex Williamson wrote: > So again, I think this comes down to new iommu driver support and new > iommu apis and new vfio apis to enable some sort of atomic update > interface, Oh absolutely. My point is some guest OS can start using atomic updates at any time since it's something IOMMU hardware supports. Adherence to a hardware spec would be preferable to adherence to an internal Linux API. I appreciate it's not an easy task involving host Linux and QEMU changes. -- MST