From patchwork Thu May 11 14:30:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13238039 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 4F94BC7EE26 for ; Thu, 11 May 2023 14:31:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238356AbjEKObr (ORCPT ); Thu, 11 May 2023 10:31:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46504 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238455AbjEKObR (ORCPT ); Thu, 11 May 2023 10:31:17 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5ED5D11DA5; Thu, 11 May 2023 07:30:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683815435; x=1715351435; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=E0KtwujeglEeF/ZWyb3T3PBoQXAEhfP+ii+zv5qpFkU=; b=OTtnqph9skXYxgvp6dA/H1U3TKi+KX4YwLNU5mc5Vn8i/4LgU6aFKv5V IBSDQNhUdAetA6bV9Kxu6xeAQOtIP2pQZdanxcJCuFP4/mzzKw2DqAg7c Xnoml4SBge8wxueKfgWPdvXY5sOf0SJfJXjPLSyp8rYk+LQNuPFY/EUa/ kiFqDVvhCBJ/3Cb2SKE5m3H/tjOq/ETYSIH63gWq/oJ7lKIDf7PW67piq yeM6Xp0eYPcLkL28dxY4NLMBwybPSkDCldJ1a00szRKb0yojsgyjpdf85 iAoZ6PCJ08Xe9Pv+/QYZbQpIhCritPEBpzYjBNfh4OTIRlqxYwosqkL8O A==; X-IronPort-AV: E=McAfee;i="6600,9927,10707"; a="378639852" X-IronPort-AV: E=Sophos;i="5.99,266,1677571200"; d="scan'208";a="378639852" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 May 2023 07:30:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10707"; a="874004405" X-IronPort-AV: E=Sophos;i="5.99,266,1677571200"; d="scan'208";a="874004405" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga005.jf.intel.com with ESMTP; 11 May 2023 07:30:25 -0700 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, zhenzhong.duan@intel.com Subject: [PATCH v3 0/4] iommufd: Add iommu hardware info reporting Date: Thu, 11 May 2023 07:30:20 -0700 Message-Id: <20230511143024.19542-1-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: 35db4f4dac813ffaa987cf633694107fabf3aff5 [1] https://github.com/yiliu1765/iommufd/tree/iommufd_nesting Change log: v3: - Add r-b from Baolu - Rename IOMMU_HW_INFO_TYPE_DEFAULT to be IOMMU_HW_INFO_TYPE_NONE to better suit what it means - Let IOMMU_DEVICE_GET_HW_INFO succeed even the underlying iommu driver does not have driver-specific data to report per below remark. https://lore.kernel.org/kvm/ZAcwJSK%2F9UVI9LXu@nvidia.com/ v2: https://lore.kernel.org/linux-iommu/20230309075358.571567-1-yi.l.liu@intel.com/ - 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 | 73 +++++++++++++++++++ drivers/iommu/iommufd/iommufd_private.h | 1 + drivers/iommu/iommufd/iommufd_test.h | 9 +++ drivers/iommu/iommufd/main.c | 3 + drivers/iommu/iommufd/selftest.c | 16 ++++ include/linux/iommu.h | 27 ++++--- include/uapi/linux/iommufd.h | 44 +++++++++++ tools/testing/selftests/iommu/iommufd.c | 17 ++++- tools/testing/selftests/iommu/iommufd_utils.h | 26 +++++++ 11 files changed, 217 insertions(+), 12 deletions(-)