From patchwork Mon Jul 24 11:13:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13324488 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 953A3C001DE for ; Mon, 24 Jul 2023 11:14:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232471AbjGXLOf (ORCPT ); Mon, 24 Jul 2023 07:14:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232048AbjGXLOP (ORCPT ); Mon, 24 Jul 2023 07:14:15 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5190F10E3; Mon, 24 Jul 2023 04:13:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690197231; x=1721733231; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=qDa2X3gdhagGNCK2/GQ0KFX2hlra/0tF2Yc8QKhk5M8=; b=BJos0H5zIokfseFOi/RPzqvGlolFazXbonBM1Qzwktqbn+e5Yzk9ZWdQ XeAuX4Das02aS+NpMrOBmw9Sy3AMJtKzPDRdr+HneSfLyoWzWCH8kW0Nu dxs+r4dNm4EqWlsRyAaTu25rS+kU+GuF6Z9mvyrwiiXW49bttYwVLaglD zhxDMgeMmnP9mpFCcpJS+9KLIXoUGFIZ41FUAKiM3r5R8o9fYYzS73dOr FHSIhErES1lUfUTdtDVYgK6Db5AEq7ouItIKIYK4HYY50ti/lIf5pBSE4 jnbLILZtxXQCtoOv2dyRjaoDdy5FGWOOU9ZMwYQM3wEuYnL8wheIqjIGG Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10780"; a="347015065" X-IronPort-AV: E=Sophos;i="6.01,228,1684825200"; d="scan'208";a="347015065" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jul 2023 04:13:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10780"; a="839415599" X-IronPort-AV: E=Sophos;i="6.01,228,1684825200"; d="scan'208";a="839415599" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga002.fm.intel.com with ESMTP; 24 Jul 2023 04:13:49 -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 v4 11/12] iommu/vt-d: Implement hw_info for iommu capability query Date: Mon, 24 Jul 2023 04:13:33 -0700 Message-Id: <20230724111335.107427-12-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230724111335.107427-1-yi.l.liu@intel.com> References: <20230724111335.107427-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add intel_iommu_hw_info() to report cap_reg and ecap_reg information. Signed-off-by: Lu Baolu Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu Reviewed-by: Lu Baolu --- drivers/iommu/intel/iommu.c | 19 +++++++++++++++++++ include/uapi/linux/iommufd.h | 23 +++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c index 6977d320c440..ba34827045e6 100644 --- a/drivers/iommu/intel/iommu.c +++ b/drivers/iommu/intel/iommu.c @@ -4748,8 +4748,26 @@ static void intel_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid) intel_pasid_tear_down_entry(iommu, dev, pasid, false); } +static void *intel_iommu_hw_info(struct device *dev, u32 *length) +{ + struct device_domain_info *info = dev_iommu_priv_get(dev); + struct intel_iommu *iommu = info->iommu; + struct iommu_hw_info_vtd *vtd; + + vtd = kzalloc(sizeof(*vtd), GFP_KERNEL); + if (!vtd) + return ERR_PTR(-ENOMEM); + + vtd->cap_reg = iommu->cap; + vtd->ecap_reg = iommu->ecap; + *length = sizeof(*vtd); + + return vtd; +} + const struct iommu_ops intel_iommu_ops = { .capable = intel_iommu_capable, + .hw_info = intel_iommu_hw_info, .domain_alloc = intel_iommu_domain_alloc, .domain_alloc_user = intel_iommu_domain_alloc_user, .probe_device = intel_iommu_probe_device, @@ -4763,6 +4781,7 @@ const struct iommu_ops intel_iommu_ops = { .def_domain_type = device_def_domain_type, .remove_dev_pasid = intel_iommu_remove_dev_pasid, .pgsize_bitmap = SZ_4K, + .hw_info_type = IOMMU_HW_INFO_TYPE_INTEL_VTD, #ifdef CONFIG_INTEL_IOMMU_SVM .page_response = intel_svm_page_response, #endif diff --git a/include/uapi/linux/iommufd.h b/include/uapi/linux/iommufd.h index 2c1241448c87..0dfb6f3d8dda 100644 --- a/include/uapi/linux/iommufd.h +++ b/include/uapi/linux/iommufd.h @@ -435,12 +435,35 @@ struct iommu_hwpt_alloc { }; #define IOMMU_HWPT_ALLOC _IO(IOMMUFD_TYPE, IOMMUFD_CMD_HWPT_ALLOC) +/** + * struct iommu_hw_info_vtd - Intel VT-d hardware information + * + * @flags: Must be 0 + * @__reserved: Must be 0 + * + * @cap_reg: Value of Intel VT-d capability register defined in VT-d spec + * section 11.4.2 Capability Register. + * @ecap_reg: Value of Intel VT-d capability register defined in VT-d spec + * section 11.4.3 Extended Capability Register. + * + * User needs to understand the Intel VT-d specification to decode the + * register value. + */ +struct iommu_hw_info_vtd { + __u32 flags; + __u32 __reserved; + __aligned_u64 cap_reg; + __aligned_u64 ecap_reg; +}; + /** * enum iommu_hw_info_type - IOMMU Hardware Info Types * @IOMMU_HW_INFO_TYPE_NONE: Used by the drivers that does not report hardware info + * @IOMMU_HW_INFO_TYPE_INTEL_VTD: Intel VT-d iommu info type */ enum iommu_hw_info_type { IOMMU_HW_INFO_TYPE_NONE, + IOMMU_HW_INFO_TYPE_INTEL_VTD, }; /**