From patchwork Thu Sep 21 07:54:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13394499 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 1DD7CE7D0A8 for ; Thu, 21 Sep 2023 20:20:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230010AbjIUUUV (ORCPT ); Thu, 21 Sep 2023 16:20:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55934 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231921AbjIUUUE (ORCPT ); Thu, 21 Sep 2023 16:20:04 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF62FAD21; Thu, 21 Sep 2023 10:11:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695316280; x=1726852280; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=S7OPx85gN2G+8RHarCfjHgmntx38eLMzDBOfexGdmYM=; b=jcDgCkeNqhdoytre2wP3usuY6Ibq/k2L8CW0yCKU1TLPiDv+v3HyxDnS aXzEpvR7Rytu27rkHs2qXsAS3Yw/n/BjTR9/ayUwEL3TU9f0nheYRuPts PIwsZkHF+dGYp0s+AK6HN6VnXQVESjr/hBQ50DPGjjVlne7pGVZGy+H+6 MfE1hYK2fHZT01uhnhikNx/EC+XDe0izY15KvBsWrgcbcQfALqKCznqOz C5tolYr0haI8xyDPIzVCDh8MohakGLPH6/VSd7PnHDxx5WXjDP2ttP+qw yn8vFN4LJegOghvfva0y8B/E0MSDOlrr0X/LrAArw56x6YMis28F8RINI g==; X-IronPort-AV: E=McAfee;i="6600,9927,10839"; a="370764450" X-IronPort-AV: E=Sophos;i="6.03,164,1694761200"; d="scan'208";a="370764450" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Sep 2023 00:54:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10839"; a="812523164" X-IronPort-AV: E=Sophos;i="6.03,164,1694761200"; d="scan'208";a="812523164" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga008.fm.intel.com with ESMTP; 21 Sep 2023 00:54:51 -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: [PATCH v5 07/11] iommufd: Add data structure for Intel VT-d stage-1 cache invalidation Date: Thu, 21 Sep 2023 00:54:27 -0700 Message-Id: <20230921075431.125239-8-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230921075431.125239-1-yi.l.liu@intel.com> References: <20230921075431.125239-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org This adds the data structure for flushing iotlb for the nested domain allocated with IOMMU_HWPT_TYPE_VTD_S1 type. This only supports invalidating IOTLB, but no for device-TLB as device-TLB invalidation will be covered automatically in the IOTLB invalidation if the underlying IOMMU driver has enabled ATS for the affected device. Signed-off-by: Yi Liu --- include/uapi/linux/iommufd.h | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index 18a502e206c3..3050efbceb57 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -510,6 +510,40 @@ struct iommu_hw_info { }; #define IOMMU_GET_HW_INFO _IO(IOMMUFD_TYPE, IOMMUFD_CMD_GET_HW_INFO) +/** + * enum iommu_hwpt_vtd_s1_invalidate_flags - Flags for Intel VT-d + * stage-1 cache invalidation + * @IOMMU_VTD_QI_FLAGS_LEAF: The LEAF flag indicates whether only the + * leaf PTE caching needs to be invalidated + * and other paging structure caches can be + * preserved. + */ +enum iommu_hwpt_vtd_s1_invalidate_flags { + IOMMU_VTD_QI_FLAGS_LEAF = 1 << 0, +}; + +/** + * struct iommu_hwpt_vtd_s1_invalidate - Intel VT-d cache invalidation + * (IOMMU_HWPT_TYPE_VTD_S1) + * @addr: The start address of the addresses to be invalidated. + * @npages: Number of contiguous 4K pages to be invalidated. + * @flags: Combination of enum iommu_hwpt_vtd_s1_invalidate_flags + * @__reserved: Must be 0 + * + * The Intel VT-d specific invalidation data for user-managed stage-1 cache + * invalidation under nested translation. Userspace uses this structure to + * tell host about the impacted caches after modifying the stage-1 page table. + * + * Invalidating all the caches related to the page table by setting @addr + * to be 0 and @npages to be __aligned_u64(-1). + */ +struct iommu_hwpt_vtd_s1_invalidate { + __aligned_u64 addr; + __aligned_u64 npages; + __u32 flags; + __u32 __reserved; +}; + /** * struct iommu_hwpt_invalidate - ioctl(IOMMU_HWPT_INVALIDATE) * @size: sizeof(struct iommu_hwpt_invalidate)