From patchwork Tue Sep 26 09:26:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13398929 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 8CAAEE7D271 for ; Tue, 26 Sep 2023 09:27:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234134AbjIZJ1E (ORCPT ); Tue, 26 Sep 2023 05:27:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234189AbjIZJ1C (ORCPT ); Tue, 26 Sep 2023 05:27:02 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F0FE419E; Tue, 26 Sep 2023 02:26:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695720415; x=1727256415; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Mlbi+6M1s6U2RPliGYVpXD/JFSTKRRNeoaMCt/HBTTw=; b=aAkgK4Mm/ko+Q2Uuo6dl5GrxClYhDiAqBYovZZjmxDPZtVNTbX/XsCnb wzjzWV+DsxyxYdWS39MgKXu3wxF0/lHmq35QI2S/o8/iFrCycPV5MT6HS w8VWdjlyQtGEb0Ji9G2m9Xt5JpO4xuTj/MorLWMgt32/7AQP8IFb3XWcq ECdPK5lF3EXy8QOAx5WBZGqrYLRRJ0vpTTCrfUb4NzsENGvcuKtmZsua7 GJgFRU8ZxcISQwLHB9DgSgdR4+OZzGufzFtZfaILWuJpPu+OdQ4E2nKoX 79O6M9eGKxBQPL0CJoVABJcUIpRahOR/I4l6ACRp0LTuU1Hnu1yWnLosj w==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="360905326" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="360905326" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 02:26:54 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="1079642512" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="1079642512" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga005.fm.intel.com with ESMTP; 26 Sep 2023 02:26:53 -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, joao.m.martins@oracle.com Subject: [RFC 0/8] iommufd support pasid attach/replace Date: Tue, 26 Sep 2023 02:26:43 -0700 Message-Id: <20230926092651.17041-1-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org PASID (Process Address Space ID) is a PCIe extension to tag the DMA transactions out of a physical device, and most modern IOMMU hardware have supported PASID granular address translation. So a PASID-capable devices can be attached to multiple hwpts (a.k.a. domains), each attachment is tagged with a PASID. This series first adds a missing iommu API to replace domain for a pasid, then adds iommufd APIs for device drivers to attach/replace/detach pasid to/from hwpt per userspace's request, and adds selftest to validate the iommufd APIs. pasid attach/replace is mandatory on Intel VT-d given the PASID table locates in the physical address space hence must be managed by the kernel, both for supporting vSVA and coming SIOV. But it's optional on ARM/AMD which allow configuring the PASID/CD table either in host physical address space or nested on top of an GPA address space. This series only add VT-d support as the minimal requirement. Complete code can be found in below link: https://github.com/yiliu1765/iommufd/tree/iommufd_pasid Regards, Yi Liu Kevin Tian (1): iommufd: Support attach/replace hwpt per pasid Lu Baolu (2): iommu: Introduce a replace API for device pasid iommu/vt-d: Add set_dev_pasid callback for nested domain Yi Liu (5): iommufd: replace attach_fn with a structure iommufd/selftest: Add set_dev_pasid and remove_dev_pasid in mock iommu iommufd/selftest: Add a helper to get test device iommufd/selftest: Add test ops to test pasid attach/detach iommufd/selftest: Add coverage for iommufd pasid attach/detach drivers/iommu/intel/nested.c | 47 +++++ drivers/iommu/iommu-priv.h | 2 + drivers/iommu/iommu.c | 73 ++++++-- drivers/iommu/iommufd/Makefile | 1 + drivers/iommu/iommufd/device.c | 42 +++-- drivers/iommu/iommufd/iommufd_private.h | 16 ++ drivers/iommu/iommufd/iommufd_test.h | 24 +++ drivers/iommu/iommufd/pasid.c | 152 ++++++++++++++++ drivers/iommu/iommufd/selftest.c | 158 ++++++++++++++-- include/linux/iommufd.h | 6 + tools/testing/selftests/iommu/iommufd.c | 172 ++++++++++++++++++ .../selftests/iommu/iommufd_fail_nth.c | 28 ++- tools/testing/selftests/iommu/iommufd_utils.h | 78 ++++++++ 13 files changed, 756 insertions(+), 43 deletions(-) create mode 100644 drivers/iommu/iommufd/pasid.c