From patchwork Thu Mar 9 07:53:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13166910 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DABDC64EC4 for ; Thu, 9 Mar 2023 07:54:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229717AbjCIHyn (ORCPT ); Thu, 9 Mar 2023 02:54:43 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230039AbjCIHyZ (ORCPT ); Thu, 9 Mar 2023 02:54:25 -0500 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB43ADBB55; Wed, 8 Mar 2023 23:54:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678348441; x=1709884441; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=RubhDtHOvvhIgkBGxFBQdeW6R2z9yWM3cIPSs3aY9iw=; b=nkkGstrxwwtqJoCvoxxS+n+y2H+PssOy3NbrLqz9PGikjwBmtzwxjF8Q r5MCqrmI0FHjCDUYXLudUSyrSEHmG8th6RLPQPxfgf/a6V8KYTPEB2hlP 0ZjflleKo7RHk2pLlSNZYYfP/WW6ftCWB9PFdXLnRO12LHZoA8Cj3Egpb SfJb1bF83F7jakg6zFBU8mAuve0CHwVqWwj/IT3xH1IZD02qurjAdg2gc 4CfR0naz8EmOprmdCa+q9ooKdeu2gEu1jqLIYagib51lmIEk/s16to5EP O2B0EJjqlVonULNm/S729k64HTnJTMY5pMjd8rob36hAmtb/5wSLJ2U1x A==; X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="422652827" X-IronPort-AV: E=Sophos;i="5.98,245,1673942400"; d="scan'208";a="422652827" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Mar 2023 23:54:01 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="851432734" X-IronPort-AV: E=Sophos;i="5.98,245,1673942400"; d="scan'208";a="851432734" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga005.jf.intel.com with ESMTP; 08 Mar 2023 23:54:00 -0800 From: Yi Liu To: joro@8bytes.org, alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com, robin.murphy@arm.com, baolu.lu@linux.intel.com Cc: cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com, jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com, lulu@redhat.com, suravee.suthikulpanit@amd.com, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v2 0/4] iommufd: Add iommu hardware info reporting Date: Wed, 8 Mar 2023 23:53:54 -0800 Message-Id: <20230309075358.571567-1-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org iommufd gives userspace the capability to manipulate iommu subsytem. e.g. DMA map/unmap etc. In the near future, it will support iommu nested translation. Different platform vendors have different implementation for the nested translation. So before set up nested translation, userspace needs to know the hardware iommu information. For example, Intel VT-d supports using guest I/O page table as the stage-1 translation table. This requires guest I/O page table be compatible with hardware IOMMU. This series reports the iommu hardware information for a given iommufd_device which has been bound to iommufd. It is preparation work for userspace to allocate hwpt for given device. Like the nested translation support[1]. This series introduces an iommu op to report the iommu hardware info, and an ioctl IOMMU_DEVICE_GET_HW_INFO is added to report such hardware info to user. enum iommu_hw_info_type is defined to differentiate the iommu hardware info reported to user hence user can decode them. This series only adds the framework for iommu hw info reporting, the complete reporting path needs vendor specific definition and driver support. The full picture is available in [1] as well. base-commit: 4c7e97cb6e65eab02991f60a5cc7a4fed5498c7a [1] https://github.com/yiliu1765/iommufd/tree/iommufd_nesting Change log: v2: - Drop patch 05 of v1 as it is already covered by other series - Rename the capability info to be iommu hardware info v1: https://lore.kernel.org/linux-iommu/20230209041642.9346-1-yi.l.liu@intel.com/ Regards, Yi Liu Lu Baolu (1): iommu: Add new iommu op to get iommu hardware information Nicolin Chen (1): iommufd/selftest: Add coverage for IOMMU_DEVICE_GET_HW_INFO ioctl Yi Liu (2): iommu: Move dev_iommu_ops() to private header iommufd: Add IOMMU_DEVICE_GET_HW_INFO drivers/iommu/iommu-priv.h | 11 +++ drivers/iommu/iommu.c | 2 + drivers/iommu/iommufd/device.c | 75 +++++++++++++++++++ drivers/iommu/iommufd/iommufd_private.h | 1 + drivers/iommu/iommufd/iommufd_test.h | 15 ++++ drivers/iommu/iommufd/main.c | 3 + drivers/iommu/iommufd/selftest.c | 16 ++++ include/linux/iommu.h | 24 +++--- include/uapi/linux/iommufd.h | 47 ++++++++++++ tools/testing/selftests/iommu/iommufd.c | 17 ++++- tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++ 11 files changed, 225 insertions(+), 12 deletions(-)