From patchwork Fri May 31 00:44:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yan Zhao X-Patchwork-Id: 10969401 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F0C61575 for ; Fri, 31 May 2019 00:51:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3278028C14 for ; Fri, 31 May 2019 00:51:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2632928C37; Fri, 31 May 2019 00:51:02 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8969A28C34 for ; Fri, 31 May 2019 00:51:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726509AbfEaAur (ORCPT ); Thu, 30 May 2019 20:50:47 -0400 Received: from mga12.intel.com ([192.55.52.136]:42235 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726131AbfEaAur (ORCPT ); Thu, 30 May 2019 20:50:47 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 30 May 2019 17:50:46 -0700 X-ExtLoop1: 1 Received: from joy-optiplex-7040.sh.intel.com ([10.239.13.9]) by orsmga001.jf.intel.com with ESMTP; 30 May 2019 17:50:40 -0700 From: Yan Zhao To: intel-gvt-dev@lists.freedesktop.org Cc: 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 v4 0/2] introduction of migration_version attribute for VFIO live migration Date: Thu, 30 May 2019 20:44:38 -0400 Message-Id: <20190531004438.24528-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patchset introduces a migration_version attribute under sysfs of VFIO Mediated devices. This migration_version attribute is used to check migration compatibility between two mdev devices of the same mdev type. Patch 1 defines migration_version attribute in Documentation/vfio-mediated-device.txt Patch 2 uses GVT as an example to show how to expose migration_version attribute and check migration compatibility in vendor driver. v4: 1. fixed indentation/spell errors, reworded several error messages 2. added a missing memory free for error handling in patch 2 v3: 1. renamed version to migration_version 2. let errno to be freely defined by vendor driver 3. let checking mdev_type be prerequisite of migration compatibility check 4. reworded most part of patch 1 5. print detailed error log in patch 2 and generate migration_version string at init time v2: 1. renamed patched 1 2. made definition of device version string completely private to vendor driver 3. reverted changes to sample mdev drivers 4. described intent and usage of version attribute more clearly. Yan Zhao (2): vfio/mdev: add migration_version attribute for mdev device drm/i915/gvt: export migration_version to mdev sysfs for Intel vGPU Documentation/vfio-mediated-device.txt | 113 +++++++++++++ drivers/gpu/drm/i915/gvt/Makefile | 2 +- drivers/gpu/drm/i915/gvt/gvt.c | 39 +++++ drivers/gpu/drm/i915/gvt/gvt.h | 5 + drivers/gpu/drm/i915/gvt/migration_version.c | 168 +++++++++++++++++++ drivers/gpu/drm/i915/gvt/vgpu.c | 13 +- 6 files changed, 337 insertions(+), 3 deletions(-) create mode 100644 drivers/gpu/drm/i915/gvt/migration_version.c