From patchwork Fri Nov 17 13:18:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13458964 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="E40/huDi" Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1251C194; Fri, 17 Nov 2023 05:18:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700227100; x=1731763100; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=VdVJ6lFF2T1wzzLTbNcHA38NvnSY911siVQVfOeeDsM=; b=E40/huDiU5g53u9KDCKLynKmDHZmwgPrsKopkuRHXnYdVcEppd/8q5kt 6sjJKtrBKTPPArAQUStkNOhpXbFvdvQ1UzvVeVu7ijLr+XDgFB437oLom 5AOcOUUhZg/DUkTTOByZokmDNgkfUYh0U9A/bI8KbTEo83RFDt45/GFbw emcVNDOxg6j+gdCOozVlC4/gizEy/n7mRuXZNGzsoIUVsXhmo1kkU/fzB Dr8w77b/W0bCTbVTmekRbD+as/hcLWpU5UeYItPkIe18XsmIwE6Iueph1 CntI2YEcP7tQo9mHQYJBKvzTf3Ho9e+aoxdRvsxz2OFHHgyUKLugfSuiE w==; X-IronPort-AV: E=McAfee;i="6600,9927,10896"; a="381685588" X-IronPort-AV: E=Sophos;i="6.04,206,1695711600"; d="scan'208";a="381685588" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2023 05:18:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10896"; a="794831195" X-IronPort-AV: E=Sophos;i="6.04,206,1695711600"; d="scan'208";a="794831195" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga008.jf.intel.com with ESMTP; 17 Nov 2023 05:18:18 -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, zhenzhong.duan@intel.com, joao.m.martins@oracle.com, xin.zeng@intel.com, yan.y.zhao@intel.com Subject: [PATCH v7 1/3] iommufd: Add data structure for Intel VT-d stage-1 cache invalidation Date: Fri, 17 Nov 2023 05:18:14 -0800 Message-Id: <20231117131816.24359-2-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231117131816.24359-1-yi.l.liu@intel.com> References: <20231117131816.24359-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This adds the data structure for flushing iotlb for the nested domain allocated with IOMMU_HWPT_DATA_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 | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index 7f92cecc87d7..cafd98642abf 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -614,6 +614,42 @@ struct iommu_hwpt_get_dirty_bitmap { #define IOMMU_HWPT_GET_DIRTY_BITMAP _IO(IOMMUFD_TYPE, \ IOMMUFD_CMD_HWPT_GET_DIRTY_BITMAP) +/** + * enum iommu_hwpt_vtd_s1_invalidate_flags - Flags for Intel VT-d + * stage-1 cache invalidation + * @IOMMU_VTD_INV_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_INV_FLAGS_LEAF = 1 << 0, +}; + +/** + * struct iommu_hwpt_vtd_s1_invalidate - Intel VT-d cache invalidation + * (IOMMU_HWPT_DATA_VTD_S1) + * @addr: The start address of the addresses to be invalidated. It needs + * to be 4KB aligned. + * @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 in nested translation. Userspace uses this structure to + * tell the impacted cache scope 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). This includes the + * corresponding device-TLB if ATS is enabled on the attached devices. + */ +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)