From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 603D0C43457 for ; Tue, 20 Oct 2020 12:47:36 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id B8BB522200 for ; Tue, 20 Oct 2020 12:47:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B8BB522200 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id ACCB06B005C; Tue, 20 Oct 2020 08:47:34 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id A2B9F6B0062; Tue, 20 Oct 2020 08:47:34 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8096E6B0068; Tue, 20 Oct 2020 08:47:34 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0191.hostedemail.com [216.40.44.191]) by kanga.kvack.org (Postfix) with ESMTP id 37CEB6B005C for ; Tue, 20 Oct 2020 08:47:34 -0400 (EDT) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id D7890180AD811 for ; Tue, 20 Oct 2020 12:47:33 +0000 (UTC) X-FDA: 77392279986.10.end27_0a0c4552723f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin10.hostedemail.com (Postfix) with ESMTP id B19FA16A0DD for ; Tue, 20 Oct 2020 12:47:33 +0000 (UTC) X-HE-Tag: end27_0a0c4552723f X-Filterd-Recvd-Size: 2879 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by imf39.hostedemail.com (Postfix) with ESMTP for ; Tue, 20 Oct 2020 12:47:32 +0000 (UTC) IronPort-SDR: Pg2syjCUcXzEFlpT5GFdUKfwyd+iZwbDUsQI8AZE3SHNbsW7LlkEtL7S6wAHH8GAGgl+WWNkla HJuey9izSnNg== X-IronPort-AV: E=McAfee;i="6000,8403,9779"; a="154142715" X-IronPort-AV: E=Sophos;i="5.77,397,1596524400"; d="scan'208";a="154142715" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2020 05:47:30 -0700 IronPort-SDR: kAVLCB4RupND9uUWmn26k6SJRCJbLtbuRawIljFVd+ITvyLkXt7FId8CXkbZUW3SCaYDueHK8G a8n3G2bJKIOg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,397,1596524400"; d="scan'208";a="332244362" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga002.jf.intel.com with ESMTP; 20 Oct 2020 05:47:25 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id BB5B9376; Tue, 20 Oct 2020 15:47:24 +0300 (EEST) Date: Tue, 20 Oct 2020 15:47:24 +0300 From: "Kirill A. Shutemov" To: Christoph Hellwig Cc: "Kirill A. Shutemov" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Paolo Bonzini , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , David Rientjes , Andrea Arcangeli , Kees Cook , Will Drewry , "Edgecombe, Rick P" , "Kleen, Andi" , Liran Alon , Mike Rapoport , x86@kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFCv2 05/16] x86/kvm: Make VirtIO use DMA API in KVM guest Message-ID: <20201020124724.mk66h5ulm3xwdksc@black.fi.intel.com> References: <20201020061859.18385-1-kirill.shutemov@linux.intel.com> <20201020061859.18385-6-kirill.shutemov@linux.intel.com> <20201020080658.GA21238@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201020080658.GA21238@infradead.org> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Oct 20, 2020 at 09:06:58AM +0100, Christoph Hellwig wrote: > NAK. Any virtio implementation that needs special DMA OPS treatment > needs to set the VIRTIO_F_ACCESS_PLATFORM bit. The only reason the > Xen hack existst is because it slipped in a long time ago and we can't > fix that any more. Thanks. Will fix. -- Kirill A. Shutemov