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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 D9D84C004C9 for ; Mon, 6 May 2019 01:52:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A902B2053B for ; Mon, 6 May 2019 01:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726197AbfEFBwm (ORCPT ); Sun, 5 May 2019 21:52:42 -0400 Received: from mga04.intel.com ([192.55.52.120]:18307 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725786AbfEFBwm (ORCPT ); Sun, 5 May 2019 21:52:42 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 May 2019 18:52:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,435,1549958400"; d="scan'208";a="140310192" Received: from joy-optiplex-7040.sh.intel.com ([10.239.13.9]) by orsmga008.jf.intel.com with ESMTP; 05 May 2019 18:52:35 -0700 From: Yan Zhao To: intel-gvt-dev@lists.freedesktop.org Cc: arei.gonglei@huawei.com, aik@ozlabs.ru, Zhengxiao.zx@alibaba-inc.com, shuangtai.tst@alibaba-inc.com, qemu-devel@nongnu.org, eauger@redhat.com, yi.l.liu@intel.com, ziye.yang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com, felipe@nutanix.com, changpeng.liu@intel.com, Ken.Xue@amd.com, jonathan.davies@nutanix.com, shaopeng.he@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, libvir-list@redhat.com, alex.williamson@redhat.com, eskultet@redhat.com, dgilbert@redhat.com, cohuck@redhat.com, kevin.tian@intel.com, zhenyuw@linux.intel.com, zhi.a.wang@intel.com, cjia@nvidia.com, kwankhede@nvidia.com, berrange@redhat.com, dinechin@redhat.com, Yan Zhao Subject: [PATCH v2 0/2] introduction of version attribute for VFIO live migration Date: Sun, 5 May 2019 21:45:14 -0400 Message-Id: <20190506014514.3555-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset introduces a version attribute under sysfs of VFIO Mediated devices. This version attribute is used to check whether two mdev devices are compatible. user space software can take advantage of this version attribute to determine whether to launch live migration between two mdev devices. Patch 1 defines version attribute in Documentation/vfio-mediated-device.txt Patch 2 uses GVT as an example to show how to expose version attribute and check device compatibility in vendor driver. v2: 1. renamed patched 1 2. made definition of device version string completely private to vendor driver 3. abandoned changes to sample mdev drivers 4. described intent and usage of version attribute more clearly. Yan Zhao (2): vfio/mdev: add version attribute for mdev device drm/i915/gvt: export mdev device version to sysfs for Intel vGPU Documentation/vfio-mediated-device.txt | 135 ++++++++++++++++++++++ drivers/gpu/drm/i915/gvt/Makefile | 2 +- drivers/gpu/drm/i915/gvt/device_version.c | 84 ++++++++++++++ drivers/gpu/drm/i915/gvt/gvt.c | 51 ++++++++ drivers/gpu/drm/i915/gvt/gvt.h | 6 + 5 files changed, 277 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/i915/gvt/device_version.c -- 2.17.1