From patchwork Thu Mar 9 08:09:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 661323 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 0F8B7C6FD19 for ; Thu, 9 Mar 2023 08:11:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230200AbjCIILV (ORCPT ); Thu, 9 Mar 2023 03:11:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57780 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230269AbjCIIKa (ORCPT ); Thu, 9 Mar 2023 03:10:30 -0500 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DAF15DB4AD; Thu, 9 Mar 2023 00:09:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678349398; x=1709885398; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Hl6KGE/GWJvBWXJmrRoyZQJPdHXffgrjU6Y+0qnffPE=; b=gooyune0CosFRbkbrpLZwAQ2YCxcUdlTVuqpLUJxKYvGw1r97cLc2Iwk sh2IX4xgm/u5R+I3rVs8A8ckR33pLxwfBmv+kgteQ8ZG4f4DDQNug14D6 AuZH7X/1EZrROhDaqQyYTW5tN7XTC0eGnHmByUv0el4ggfGylxPwbY5mK bZl6XnVfOPFUMC3KprLqCcd1lYqfUBfrtFpbmTCAYBTHpiDcUy6+4+dfv NXhBUi/+5Y4/aCRkm1ihhvAd3YksnuJV/KLFEvm7it5DG7btCe/YFDp8x Hvdf4lS5YCaxdQqN89MaBdxZwsQWKS/PuJZPd9Xek+mMvIl3JUHlXf0db Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="364023222" X-IronPort-AV: E=Sophos;i="5.98,245,1673942400"; d="scan'208";a="364023222" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Mar 2023 00:09:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10643"; a="787471444" X-IronPort-AV: E=Sophos;i="5.98,245,1673942400"; d="scan'208";a="787471444" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by fmsmga002.fm.intel.com with ESMTP; 09 Mar 2023 00:09:44 -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 Subject: [PATCH 10/12] iommufd/selftest: Add coverage for IOMMU_HWPT_ALLOC with user data Date: Thu, 9 Mar 2023 00:09:08 -0800 Message-Id: <20230309080910.607396-11-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230309080910.607396-1-yi.l.liu@intel.com> References: <20230309080910.607396-1-yi.l.liu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Nicolin Chen The IOMMU_HWPT_ALLOC ioctl now supports passing user_data to allocate a customized domain. Add its coverage for both a regular domain case and a nested domain case. Signed-off-by: Nicolin Chen Signed-off-by: Yi Liu --- tools/testing/selftests/iommu/iommufd.c | 114 +++++++++++++++++- tools/testing/selftests/iommu/iommufd_utils.h | 36 ++++++ 2 files changed, 149 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index d2ce2ddbdc40..783afd6ccd2e 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -125,6 +125,7 @@ TEST_F(iommufd, cmd_length) TEST_LENGTH(iommu_option, IOMMU_OPTION); TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS); TEST_LENGTH(iommu_hw_info, IOMMU_DEVICE_GET_HW_INFO); + TEST_LENGTH(iommu_hwpt_alloc, IOMMU_HWPT_ALLOC); #undef TEST_LENGTH } @@ -197,6 +198,7 @@ FIXTURE_VARIANT(iommufd_ioas) { unsigned int mock_domains; unsigned int memory_limit; + bool new_hwpt; }; FIXTURE_SETUP(iommufd_ioas) @@ -236,6 +238,12 @@ FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain) .mock_domains = 1, }; +FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain_hwpt) +{ + .mock_domains = 1, + .new_hwpt = true, +}; + FIXTURE_VARIANT_ADD(iommufd_ioas, two_mock_domain) { .mock_domains = 2, @@ -263,6 +271,93 @@ TEST_F(iommufd_ioas, ioas_destroy) } } +TEST_F(iommufd_ioas, hwpt_alloc) +{ + uint32_t new_hwpt_id = 0; + + if (self->stdev_id && self->device_id) { + test_cmd_hwpt_alloc(self->device_id, self->ioas_id, &new_hwpt_id); + test_cmd_mock_domain_replace(self->stdev_id, new_hwpt_id); + /* hw_pagetable cannot be freed if a device is attached to it */ + EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, new_hwpt_id)); + + /* Detach from the new hw_pagetable and try again */ + test_cmd_mock_domain_replace(self->stdev_id, self->ioas_id); + test_ioctl_destroy(new_hwpt_id); + } else { + test_err_cmd_hwpt_alloc(ENOENT, self->device_id, + self->ioas_id, &new_hwpt_id); + test_err_mock_domain_replace(ENOENT, + self->stdev_id, new_hwpt_id); + } +} + +TEST_F(iommufd_ioas, nested_hwpt_alloc) +{ + uint32_t nested_hwpt_id[2] = {}; + uint32_t parent_hwpt_id = 0; + uint32_t test_hwpt_id = 0; + + if (self->device_id) { + /* Negative tests */ + test_err_cmd_hwpt_alloc(ENOENT, self->ioas_id, self->device_id, + &test_hwpt_id); + test_err_cmd_hwpt_alloc(EINVAL, self->device_id, + self->device_id, &test_hwpt_id); + + /* Allocate two nested hwpts sharing one common parent hwpt */ + test_cmd_hwpt_alloc(self->device_id, self->ioas_id, + &parent_hwpt_id); + + test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, + &nested_hwpt_id[0]); + test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, + &nested_hwpt_id[1]); + + /* Negative test: a nested hwpt on top of a nested hwpt */ + test_err_cmd_hwpt_alloc_nested(EINVAL, self->device_id, + nested_hwpt_id[0], + &test_hwpt_id); + /* Negative test: parent hwpt now cannot be freed */ + EXPECT_ERRNO(EBUSY, + _test_ioctl_destroy(self->fd, parent_hwpt_id)); + + /* Attach device to nested_hwpt_id[0] that then will be busy */ + test_cmd_mock_domain_replace(self->stdev_id, + nested_hwpt_id[0]); + EXPECT_ERRNO(EBUSY, + _test_ioctl_destroy(self->fd, nested_hwpt_id[0])); + + /* Switch from nested_hwpt_id[0] to nested_hwpt_id[1] */ + test_cmd_mock_domain_replace(self->stdev_id, + nested_hwpt_id[1]); + EXPECT_ERRNO(EBUSY, + _test_ioctl_destroy(self->fd, nested_hwpt_id[1])); + test_ioctl_destroy(nested_hwpt_id[0]); + + /* Detach from nested_hwpt_id[1] and destroy it */ + test_cmd_mock_domain_replace(self->stdev_id, parent_hwpt_id); + test_ioctl_destroy(nested_hwpt_id[1]); + + /* Detach from the parent hw_pagetable and destroy it */ + test_cmd_mock_domain_replace(self->stdev_id, self->ioas_id); + test_ioctl_destroy(parent_hwpt_id); + } else { + test_err_cmd_hwpt_alloc(ENOENT, self->device_id, self->ioas_id, + &parent_hwpt_id); + test_err_cmd_hwpt_alloc_nested(ENOENT, self->device_id, + parent_hwpt_id, + &nested_hwpt_id[0]); + test_err_cmd_hwpt_alloc_nested(ENOENT, self->device_id, + parent_hwpt_id, + &nested_hwpt_id[1]); + test_err_mock_domain_replace(ENOENT, self->stdev_id, + nested_hwpt_id[0]); + test_err_mock_domain_replace(ENOENT, self->stdev_id, + nested_hwpt_id[1]); + } +} + TEST_F(iommufd_ioas, hwpt_attach) { /* Create a device attached directly to a hwpt */ @@ -632,6 +727,8 @@ TEST_F(iommufd_ioas, access_pin) MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES); for (npages = 1; npages < BUFFER_SIZE / PAGE_SIZE; npages++) { + uint32_t new_hwpt_id = 0; + uint32_t mock_device_id; uint32_t mock_stdev_id; uint32_t mock_hwpt_id; @@ -665,12 +762,27 @@ TEST_F(iommufd_ioas, access_pin) _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), &access_cmd)); test_cmd_mock_domain(self->ioas_id, &mock_stdev_id, - &mock_hwpt_id, NULL); + &mock_hwpt_id, &mock_device_id); check_map_cmd.id = mock_hwpt_id; + if (variant->new_hwpt) { + test_cmd_hwpt_alloc(mock_device_id, self->ioas_id, + &new_hwpt_id); + test_cmd_mock_domain_replace(mock_stdev_id, + new_hwpt_id); + check_map_cmd.id = new_hwpt_id; + } else { + check_map_cmd.id = mock_hwpt_id; + } ASSERT_EQ(0, ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_MAP), &check_map_cmd)); + if (variant->new_hwpt) { + /* Detach from the new hwpt for its destroy() */ + test_cmd_mock_domain_replace(mock_stdev_id, + mock_hwpt_id); + test_ioctl_destroy(new_hwpt_id); + } test_ioctl_destroy(mock_stdev_id); test_cmd_destroy_access_pages( access_cmd.id, diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h index b57e1e60f69d..e0e484e1c775 100644 --- a/tools/testing/selftests/iommu/iommufd_utils.h +++ b/tools/testing/selftests/iommu/iommufd_utils.h @@ -116,6 +116,42 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id, #define test_cmd_hwpt_alloc(device_id, pt_id, hwpt_id) \ ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, hwpt_id)) +#define test_err_cmd_hwpt_alloc(_errno, device_id, pt_id, hwpt_id) \ + EXPECT_ERRNO(_errno, _test_cmd_hwpt_alloc(self->fd, device_id, \ + pt_id, hwpt_id)) + +static int _test_cmd_hwpt_alloc_nested(int fd, __u32 device_id, __u32 parent_id, + __u32 *hwpt_id) +{ + struct iommu_hwpt_selftest data = { + .flags = IOMMU_TEST_FLAG_NESTED, + .test_config = IOMMU_TEST_IOTLB_DEFAULT, + }; + struct iommu_hwpt_alloc cmd = { + .size = sizeof(cmd), + .dev_id = device_id, + .pt_id = parent_id, + .data_type = IOMMU_HWPT_TYPE_SELFTTEST, + .data_len = sizeof(data), + .data_uptr = (uint64_t)&data, + }; + int ret; + + ret = ioctl(fd, IOMMU_HWPT_ALLOC, &cmd); + if (ret) + return ret; + if (hwpt_id) + *hwpt_id = cmd.out_hwpt_id; + return 0; +} + +#define test_cmd_hwpt_alloc_nested(device_id, parent_id, hwpt_id) \ + ASSERT_EQ(0, _test_cmd_hwpt_alloc_nested(self->fd, device_id, \ + parent_id, hwpt_id)) +#define test_err_cmd_hwpt_alloc_nested(_errno, device_id, parent_id, hwpt_id) \ + EXPECT_ERRNO(_errno, \ + _test_cmd_hwpt_alloc_nested(self->fd, device_id, \ + parent_id, hwpt_id)) static int _test_cmd_access_set_ioas(int fd, __u32 access_id, unsigned int ioas_id)