From patchwork Thu Oct 24 05:08:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhenyu Wang X-Patchwork-Id: 11208279 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4C74B139A for ; Thu, 24 Oct 2019 05:08:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 34F1B20679 for ; Thu, 24 Oct 2019 05:08:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437451AbfJXFIe (ORCPT ); Thu, 24 Oct 2019 01:08:34 -0400 Received: from mga11.intel.com ([192.55.52.93]:7748 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725298AbfJXFIe (ORCPT ); Thu, 24 Oct 2019 01:08:34 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Oct 2019 22:08:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,223,1569308400"; d="scan'208";a="197627623" Received: from debian-nuc.sh.intel.com ([10.239.160.133]) by fmsmga007.fm.intel.com with ESMTP; 23 Oct 2019 22:08:32 -0700 From: Zhenyu Wang To: kvm@vger.kernel.org Cc: alex.williamson@redhat.com, kwankhede@nvidia.com, kevin.tian@intel.com, cohuck@redhat.com Subject: [PATCH 0/6] VFIO mdev aggregated resources handling Date: Thu, 24 Oct 2019 13:08:23 +0800 Message-Id: <20191024050829.4517-1-zhenyuw@linux.intel.com> X-Mailer: git-send-email 2.24.0.rc0 MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Hi, This is a refresh for previous send of this series. I got impression that some SIOV drivers would still deploy their own create and config method so stopped effort on this. But seems this would still be useful for some other SIOV driver which may simply want capability to aggregate resources. So here's refreshed series. Current mdev device create interface depends on fixed mdev type, which get uuid from user to create instance of mdev device. If user wants to use customized number of resource for mdev device, then only can create new mdev type for that which may not be flexible. This requirement comes not only from to be able to allocate flexible resources for KVMGT, but also from Intel scalable IO virtualization which would use vfio/mdev to be able to allocate arbitrary resources on mdev instance. More info on [1] [2] [3]. To allow to create user defined resources for mdev, it trys to extend mdev create interface by adding new "aggregate=xxx" parameter following UUID, for target mdev type if aggregation is supported, it can create new mdev device which contains resources combined by number of instances, e.g echo ",aggregate=10" > create VM manager e.g libvirt can check mdev type with "aggregation" attribute which can support this setting. If no "aggregation" attribute found for mdev type, previous behavior is still kept for one instance allocation. And new sysfs attribute "aggregated_instances" is created for each mdev device to show allocated number. References: [1] https://software.intel.com/en-us/download/intel-virtualization-technology-for-directed-io-architecture-specification [2] https://software.intel.com/en-us/download/intel-scalable-io-virtualization-technical-specification [3] https://schd.ws/hosted_files/lc32018/00/LC3-SIOV-final.pdf Zhenyu Wang (6): vfio/mdev: Add new "aggregate" parameter for mdev create vfio/mdev: Add "aggregation" attribute for supported mdev type vfio/mdev: Add "aggregated_instances" attribute for supported mdev device Documentation/driver-api/vfio-mediated-device.rst: Update for vfio/mdev aggregation support Documentation/ABI/testing/sysfs-bus-vfio-mdev: Update for vfio/mdev aggregation support drm/i915/gvt: Add new type with aggregation support Documentation/ABI/testing/sysfs-bus-vfio-mdev | 24 ++++++ .../driver-api/vfio-mediated-device.rst | 23 ++++++ drivers/gpu/drm/i915/gvt/gvt.c | 4 +- drivers/gpu/drm/i915/gvt/gvt.h | 11 ++- drivers/gpu/drm/i915/gvt/kvmgt.c | 53 ++++++++++++- drivers/gpu/drm/i915/gvt/vgpu.c | 56 ++++++++++++- drivers/vfio/mdev/mdev_core.c | 36 ++++++++- drivers/vfio/mdev/mdev_private.h | 6 +- drivers/vfio/mdev/mdev_sysfs.c | 79 ++++++++++++++++++- include/linux/mdev.h | 19 +++++ 10 files changed, 294 insertions(+), 17 deletions(-)