From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:33971) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hHP3W-0003Zq-9u for qemu-devel@nongnu.org; Fri, 19 Apr 2019 04:39:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hHP3V-0003Q7-Bd for qemu-devel@nongnu.org; Fri, 19 Apr 2019 04:39:34 -0400 Received: from mga01.intel.com ([192.55.52.88]:45450) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hHP3V-0003L6-2m for qemu-devel@nongnu.org; Fri, 19 Apr 2019 04:39:33 -0400 From: Yan Zhao Date: Fri, 19 Apr 2019 04:32:58 -0400 Message-Id: <20190419083258.19580-1-yan.y.zhao@intel.com> Subject: [Qemu-devel] [PATCH 0/2] introduction of version attribute for VFIO live migration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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, Yan Zhao This patchset introduces a version attribute under sysfs of VFIO Mediated devices. This version attribute is used by user space software like libvirt to determine whether two mdev devices are compatible for live migration before starting live migration. Patch 1 defines version attribute as mandatory for VFIO live migration. It means if version attribute is missing or it returns errno, the corresponding mdev device is regarded as not supporting live migration. samples for vfio-mdev are modified to demonstrate it. Patch 2 uses GVT as an example to show how to expose version attribute and check device compatibility in vendor driver. Yan Zhao (2): vfio/mdev: add version field as mandatory attribute for mdev device drm/i915/gvt: export mdev device version to sysfs for Intel vGPU Documentation/vfio-mediated-device.txt | 36 +++++++++ drivers/gpu/drm/i915/gvt/Makefile | 2 +- drivers/gpu/drm/i915/gvt/device_version.c | 94 +++++++++++++++++++++++ drivers/gpu/drm/i915/gvt/gvt.c | 55 +++++++++++++ drivers/gpu/drm/i915/gvt/gvt.h | 6 ++ samples/vfio-mdev/mbochs.c | 17 ++++ samples/vfio-mdev/mdpy.c | 16 ++++ samples/vfio-mdev/mtty.c | 16 ++++ 8 files changed, 241 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/i915/gvt/device_version.c -- 2.17.1 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=-2.9 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 C5475C282DA for ; Fri, 19 Apr 2019 08:40:23 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 947CD217F9 for ; Fri, 19 Apr 2019 08:40:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 947CD217F9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([127.0.0.1]:53386 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hHP4I-0003r3-EN for qemu-devel@archiver.kernel.org; Fri, 19 Apr 2019 04:40:22 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33971) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hHP3W-0003Zq-9u for qemu-devel@nongnu.org; Fri, 19 Apr 2019 04:39:35 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hHP3V-0003Q7-Bd for qemu-devel@nongnu.org; Fri, 19 Apr 2019 04:39:34 -0400 Received: from mga01.intel.com ([192.55.52.88]:45450) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hHP3V-0003L6-2m for qemu-devel@nongnu.org; Fri, 19 Apr 2019 04:39:33 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Apr 2019 01:39:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,368,1549958400"; d="scan'208";a="141935693" Received: from joy-optiplex-7040.sh.intel.com ([10.239.13.9]) by fmsmga008.fm.intel.com with ESMTP; 19 Apr 2019 01:39:19 -0700 From: Yan Zhao To: intel-gvt-dev@lists.freedesktop.org Date: Fri, 19 Apr 2019 04:32:58 -0400 Message-Id: <20190419083258.19580-1-yan.y.zhao@intel.com> X-Mailer: git-send-email 2.17.1 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.88 Subject: [Qemu-devel] [PATCH 0/2] introduction of version attribute for VFIO live migration X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cjia@nvidia.com, kvm@vger.kernel.org, aik@ozlabs.ru, Zhengxiao.zx@alibaba-inc.com, shuangtai.tst@alibaba-inc.com, qemu-devel@nongnu.org, kwankhede@nvidia.com, eauger@redhat.com, yi.l.liu@intel.com, eskultet@redhat.com, ziye.yang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com, libvir-list@redhat.com, arei.gonglei@huawei.com, felipe@nutanix.com, Ken.Xue@amd.com, kevin.tian@intel.com, Yan Zhao , dgilbert@redhat.com, zhenyuw@linux.intel.com, alex.williamson@redhat.com, changpeng.liu@intel.com, cohuck@redhat.com, linux-kernel@vger.kernel.org, zhi.a.wang@intel.com, jonathan.davies@nutanix.com, shaopeng.he@intel.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="UTF-8" Message-ID: <20190419083258.cRet5pmbTPuC2_uXQzkqtM3V1pzSePef8Kqjud0tMNk@z> This patchset introduces a version attribute under sysfs of VFIO Mediated devices. This version attribute is used by user space software like libvirt to determine whether two mdev devices are compatible for live migration before starting live migration. Patch 1 defines version attribute as mandatory for VFIO live migration. It means if version attribute is missing or it returns errno, the corresponding mdev device is regarded as not supporting live migration. samples for vfio-mdev are modified to demonstrate it. Patch 2 uses GVT as an example to show how to expose version attribute and check device compatibility in vendor driver. Yan Zhao (2): vfio/mdev: add version field as mandatory attribute for mdev device drm/i915/gvt: export mdev device version to sysfs for Intel vGPU Documentation/vfio-mediated-device.txt | 36 +++++++++ drivers/gpu/drm/i915/gvt/Makefile | 2 +- drivers/gpu/drm/i915/gvt/device_version.c | 94 +++++++++++++++++++++++ drivers/gpu/drm/i915/gvt/gvt.c | 55 +++++++++++++ drivers/gpu/drm/i915/gvt/gvt.h | 6 ++ samples/vfio-mdev/mbochs.c | 17 ++++ samples/vfio-mdev/mdpy.c | 16 ++++ samples/vfio-mdev/mtty.c | 16 ++++ 8 files changed, 241 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/i915/gvt/device_version.c -- 2.17.1