From patchwork Fri Oct 20 09:19:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 736487 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 E147CC19F5C for ; Fri, 20 Oct 2023 09:20:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376777AbjJTJUe (ORCPT ); Fri, 20 Oct 2023 05:20:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376689AbjJTJUT (ORCPT ); Fri, 20 Oct 2023 05:20:19 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF63D10C9; Fri, 20 Oct 2023 02:20:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697793606; x=1729329606; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=WecaBkjQIRXL/SAH1O7c8IdbUV3/1HB1OkZaHJ7DeYY=; b=GHu3mM1I7QXKQ2uD1BsQftU2RxgCJDqdKvtUVRhPgULDqreQ2gq4v6YD sKzmuy/jFYt7VY1lsbcDh+1iUz3VS2bQL7yD0Z1EAq9e+xLEgc8YnyuYt UwhzLqwiVY7ZgPN9fMbJhfbmsqLsREOLX0DEjQk9Yq5bapmyUoIJt/R3D 3JpkilMC4aydYgYjLsEX/ggS518nm4L9A0qY/WkzedYUTg3QuV+yRF3Yj eMlYRn49dXkVZ//Gz9X9VLjQ/9wx9tkS3Beled5+NYsdkeoJc9gFJsaLI 2yMbrRb89TYownh1Vt9uHmRjOPXn+J/PhvX64p/IWfM9fwqXkaQdVOfvt A==; X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="366693443" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="366693443" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Oct 2023 02:20:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10868"; a="707179478" X-IronPort-AV: E=Sophos;i="6.03,238,1694761200"; d="scan'208";a="707179478" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orsmga003.jf.intel.com with ESMTP; 20 Oct 2023 02:20:03 -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, xin.zeng@intel.com Subject: [PATCH v5 09/10] iommufd/selftest: Add nested domain allocation for mock domain Date: Fri, 20 Oct 2023 02:19:45 -0700 Message-Id: <20231020091946.12173-10-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231020091946.12173-1-yi.l.liu@intel.com> References: <20231020091946.12173-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Nicolin Chen Add nested domain support in the ->domain_alloc_user op with some proper sanity checks. Then, add a domain_nested_ops for all nested domains and split the get_md_pagetable helper into paging and nested helpers. Also, add an iotlb as a testing property of a nested domain. Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu --- drivers/iommu/iommufd/iommufd_test.h | 18 ++++ drivers/iommu/iommufd/selftest.c | 135 +++++++++++++++++++++++---- 2 files changed, 133 insertions(+), 20 deletions(-) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index 3f3644375bf1..440ec3d64099 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -40,6 +40,11 @@ enum { MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES = 1 << 0, }; +enum { + MOCK_NESTED_DOMAIN_IOTLB_ID_MAX = 3, + MOCK_NESTED_DOMAIN_IOTLB_NUM = 4, +}; + struct iommu_test_cmd { __u32 size; __u32 op; @@ -109,4 +114,17 @@ struct iommu_test_hw_info { __u32 test_reg; }; +/* Should not be equal to any defined value in enum iommu_hwpt_data_type */ +#define IOMMU_HWPT_DATA_SELFTEST 0xdead + +/** + * struct iommu_hwpt_selftest + * + * @iotlb: default mock iotlb value, IOMMU_TEST_IOTLB_DEFAULT + */ +struct iommu_hwpt_selftest { +#define IOMMU_TEST_IOTLB_DEFAULT 0xbadbeef + __u32 iotlb; +}; + #endif diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index eca5b1d0919d..5f513c5d6876 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -90,6 +90,12 @@ struct mock_iommu_domain { struct xarray pfns; }; +struct mock_iommu_domain_nested { + struct iommu_domain domain; + struct mock_iommu_domain *parent; + u32 iotlb[MOCK_NESTED_DOMAIN_IOTLB_NUM]; +}; + enum selftest_obj_type { TYPE_IDEV, }; @@ -147,20 +153,16 @@ static void *mock_domain_hw_info(struct device *dev, u32 *length, u32 *type) } static const struct iommu_ops mock_ops; +static struct iommu_domain_ops domain_nested_ops; -static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type) +static struct iommu_domain * +__mock_domain_alloc_paging(unsigned int iommu_domain_type) { struct mock_iommu_domain *mock; - if (iommu_domain_type == IOMMU_DOMAIN_BLOCKED) - return &mock_blocking_domain; - - if (iommu_domain_type != IOMMU_DOMAIN_UNMANAGED) - return NULL; - mock = kzalloc(sizeof(*mock), GFP_KERNEL); if (!mock) - return NULL; + return ERR_PTR(-ENOMEM); mock->domain.geometry.aperture_start = MOCK_APERTURE_START; mock->domain.geometry.aperture_end = MOCK_APERTURE_LAST; mock->domain.pgsize_bitmap = MOCK_IO_PAGE_SIZE; @@ -170,20 +172,72 @@ static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type) return &mock->domain; } +static struct iommu_domain * +__mock_domain_alloc_nested(struct mock_iommu_domain *mock_parent, + const struct iommu_hwpt_selftest *user_cfg) +{ + struct mock_iommu_domain_nested *mock_nested; + int i; + + mock_nested = kzalloc(sizeof(*mock_nested), GFP_KERNEL); + if (!mock_nested) + return ERR_PTR(-ENOMEM); + mock_nested->parent = mock_parent; + mock_nested->domain.ops = &domain_nested_ops; + mock_nested->domain.type = IOMMU_DOMAIN_NESTED; + for (i = 0; i < MOCK_NESTED_DOMAIN_IOTLB_NUM; i++) + mock_nested->iotlb[i] = user_cfg->iotlb; + return &mock_nested->domain; +} + +static struct iommu_domain *mock_domain_alloc(unsigned int iommu_domain_type) +{ + struct iommu_domain *domain; + + if (iommu_domain_type == IOMMU_DOMAIN_BLOCKED) + return &mock_blocking_domain; + if (iommu_domain_type != IOMMU_DOMAIN_UNMANAGED) + return NULL; + domain = __mock_domain_alloc_paging(iommu_domain_type); + if (IS_ERR(domain)) + domain = NULL; + return domain; +} + static struct iommu_domain * mock_domain_alloc_user(struct device *dev, u32 flags, struct iommu_domain *parent, const struct iommu_user_data *user_data) { - struct iommu_domain *domain; + struct mock_iommu_domain *mock_parent; + struct iommu_hwpt_selftest user_cfg; + int rc; if (flags & (~IOMMU_HWPT_ALLOC_NEST_PARENT)) return ERR_PTR(-EOPNOTSUPP); - domain = mock_domain_alloc(IOMMU_DOMAIN_UNMANAGED); - if (!domain) - domain = ERR_PTR(-ENOMEM); - return domain; + if (!user_data) { /* must be mock_domain */ + if (parent) + return ERR_PTR(-EINVAL); + return __mock_domain_alloc_paging(IOMMU_DOMAIN_UNMANAGED); + } + + /* must be mock_domain_nested */ + if (user_data->type != IOMMU_HWPT_DATA_SELFTEST) + return ERR_PTR(-EOPNOTSUPP); + if (!parent || parent->ops != mock_ops.default_domain_ops) + return ERR_PTR(-EINVAL); + + mock_parent = container_of(parent, struct mock_iommu_domain, domain); + if (!mock_parent) + return ERR_PTR(-EINVAL); + + rc = iommu_copy_struct_from_user(&user_cfg, user_data, + IOMMU_HWPT_DATA_SELFTEST, iotlb); + if (rc) + return ERR_PTR(rc); + + return __mock_domain_alloc_nested(mock_parent, &user_cfg); } static void mock_domain_free(struct iommu_domain *domain) @@ -342,19 +396,41 @@ static const struct iommu_ops mock_ops = { }, }; +static void mock_domain_free_nested(struct iommu_domain *domain) +{ + struct mock_iommu_domain_nested *mock_nested = + container_of(domain, struct mock_iommu_domain_nested, domain); + + kfree(mock_nested); +} + +static struct iommu_domain_ops domain_nested_ops = { + .free = mock_domain_free_nested, + .attach_dev = mock_domain_nop_attach, +}; + static inline struct iommufd_hw_pagetable * -get_md_pagetable(struct iommufd_ucmd *ucmd, u32 mockpt_id, - struct mock_iommu_domain **mock) +__get_md_pagetable(struct iommufd_ucmd *ucmd, u32 mockpt_id, u32 hwpt_type) { - struct iommufd_hw_pagetable *hwpt; struct iommufd_object *obj; - obj = iommufd_get_object(ucmd->ictx, mockpt_id, - IOMMUFD_OBJ_HWPT_PAGING); + obj = iommufd_get_object(ucmd->ictx, mockpt_id, hwpt_type); if (IS_ERR(obj)) return ERR_CAST(obj); - hwpt = container_of(obj, struct iommufd_hw_pagetable, obj); - if (hwpt->domain->ops != mock_ops.default_domain_ops) { + return container_of(obj, struct iommufd_hw_pagetable, obj); +} + +static inline struct iommufd_hw_pagetable * +get_md_pagetable(struct iommufd_ucmd *ucmd, u32 mockpt_id, + struct mock_iommu_domain **mock) +{ + struct iommufd_hw_pagetable *hwpt; + + hwpt = __get_md_pagetable(ucmd, mockpt_id, IOMMUFD_OBJ_HWPT_PAGING); + if (IS_ERR(hwpt)) + return hwpt; + if (hwpt->domain->type != IOMMU_DOMAIN_UNMANAGED || + hwpt->domain->ops != mock_ops.default_domain_ops) { iommufd_put_object(&hwpt->obj); return ERR_PTR(-EINVAL); } @@ -362,6 +438,25 @@ get_md_pagetable(struct iommufd_ucmd *ucmd, u32 mockpt_id, return hwpt; } +static inline struct iommufd_hw_pagetable * +get_md_pagetable_nested(struct iommufd_ucmd *ucmd, u32 mockpt_id, + struct mock_iommu_domain_nested **mock_nested) +{ + struct iommufd_hw_pagetable *hwpt; + + hwpt = __get_md_pagetable(ucmd, mockpt_id, IOMMUFD_OBJ_HWPT_NESTED); + if (IS_ERR(hwpt)) + return hwpt; + if (hwpt->domain->type != IOMMU_DOMAIN_NESTED || + hwpt->domain->ops != &domain_nested_ops) { + iommufd_put_object(&hwpt->obj); + return ERR_PTR(-EINVAL); + } + *mock_nested = container_of(hwpt->domain, + struct mock_iommu_domain_nested, domain); + return hwpt; +} + struct mock_bus_type { struct bus_type bus; struct notifier_block nb;