From patchwork Thu Dec 28 15:06:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 759162 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2725101DD; Thu, 28 Dec 2023 15:06:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="A/nwh0MY" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1703775999; x=1735311999; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=YaKsYJmpoP1J2+af2wMppPzhvG3pSWEOhFLhzXoh4BU=; b=A/nwh0MYqkfjoz4FsREjIMRaBSxBLIGf/N0IQ/9ISszL2PnJI9n3J2rS TG9LfMhL3NfM+60QumyKhwy7u5zX+oZO/0D4TbhPk306IhaNvh2ZzcH3Z lrYdjZ8noeULSNudi+FEPiMeUMerlFFe+VJcqp1BrsCe1Ub1Qic4IwUCZ t6t45yEr6karyGtl6o8KvrbQHbphQ8BK58DDYmTTr1PwKPrr0RwxRuFXu Sg3RSU26OX2j1HMOZlewYsTHxjnG/j/3MDepD0AiZKLb4Tgh6SvatiPXK R679Wh6mTdREMnW0Q2NEP+PygLOii9lcOsbj6d9R9dk+OijjnsM20yFJ/ Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10936"; a="393701938" X-IronPort-AV: E=Sophos;i="6.04,312,1695711600"; d="scan'208";a="393701938" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Dec 2023 07:06:38 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10936"; a="869155170" X-IronPort-AV: E=Sophos;i="6.04,312,1695711600"; d="scan'208";a="869155170" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by FMSMGA003.fm.intel.com with ESMTP; 28 Dec 2023 07:06:37 -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, j.granados@samsung.com Subject: [PATCH v9 04/10] iommufd/selftest: Add mock_domain_cache_invalidate_user support Date: Thu, 28 Dec 2023 07:06:23 -0800 Message-Id: <20231228150629.13149-5-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231228150629.13149-1-yi.l.liu@intel.com> References: <20231228150629.13149-1-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 From: Nicolin Chen Add mock_domain_cache_invalidate_user() data structure to support user space selftest program to cover user cache invalidation pathway. Reviewed-by: Kevin Tian Signed-off-by: Nicolin Chen Co-developed-by: Yi Liu Signed-off-by: Yi Liu --- drivers/iommu/iommufd/iommufd_test.h | 34 ++++++++++++++++ drivers/iommu/iommufd/selftest.c | 60 ++++++++++++++++++++++++++++ 2 files changed, 94 insertions(+) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index 7910fbe1962d..2eef5afde711 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -148,4 +148,38 @@ struct iommu_hwpt_selftest { __u32 iotlb; }; +/* Should not be equal to any defined value in enum iommu_hwpt_invalidate_data_type */ +#define IOMMU_HWPT_INVALIDATE_DATA_SELFTEST 0xdeadbeef +#define IOMMU_HWPT_INVALIDATE_DATA_SELFTEST_INVALID 0xdadbeef + +/** + * enum iommu_hwpt_invalidate_selftest_error - Hardware error of invalidation + * @IOMMU_TEST_INVALIDATE_FAKE_ERROR: Fake hw error per test program's request + */ +enum iommu_hwpt_invalidate_selftest_error { + IOMMU_TEST_INVALIDATE_FAKE_ERROR = (1 << 0) +}; + +/** + * struct iommu_hwpt_invalidate_selftest - Invalidation data for Mock driver + * (IOMMU_HWPT_INVALIDATE_DATA_SELFTEST) + * @flags: Invalidate flags + * @iotlb_id: Invalidate iotlb entry index + * @hw_error: One of enum iommu_hwpt_invalidate_selftest_error + * @__reserved: Must be 0 + * + * If IOMMU_TEST_INVALIDATE_ALL is set in @flags, @iotlb_id will be ignored + * @hw_error meaningful only if the request is processed successfully. + * If IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR is set in @flags, report a + * hw error back, cache would not be invalidated in this case. + */ +struct iommu_hwpt_invalidate_selftest { +#define IOMMU_TEST_INVALIDATE_FLAG_ALL (1 << 0) +#define IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR (1 << 1) + __u32 flags; + __u32 iotlb_id; + __u32 hw_error; + __u32 __reserved; +}; + #endif diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 022ef8f55088..ebc6c15abf67 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -473,9 +473,69 @@ static void mock_domain_free_nested(struct iommu_domain *domain) kfree(mock_nested); } +static int +mock_domain_cache_invalidate_user(struct iommu_domain *domain, + struct iommu_user_data_array *array) +{ + struct mock_iommu_domain_nested *mock_nested = + container_of(domain, struct mock_iommu_domain_nested, domain); + u32 hw_error = 0, processed = 0; + struct iommu_hwpt_invalidate_selftest inv; + int i = 0, j; + int rc = 0; + + if (array->type != IOMMU_HWPT_INVALIDATE_DATA_SELFTEST) { + rc = -EINVAL; + goto out; + } + + for ( ; i < array->entry_num; i++) { + rc = iommu_copy_struct_from_user_array(&inv, array, + IOMMU_HWPT_INVALIDATE_DATA_SELFTEST, + i, __reserved); + if (rc) + break; + + if ((inv.flags & ~(IOMMU_TEST_INVALIDATE_FLAG_ALL | + IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR)) || + inv.__reserved) { + rc = -EOPNOTSUPP; + break; + } + + if (inv.iotlb_id > MOCK_NESTED_DOMAIN_IOTLB_ID_MAX) { + rc = -EINVAL; + break; + } + + if (inv.flags & IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR) { + hw_error = IOMMU_TEST_INVALIDATE_FAKE_ERROR; + } else if (inv.flags & IOMMU_TEST_INVALIDATE_FLAG_ALL) { + /* Invalidate all mock iotlb entries and ignore iotlb_id */ + for (j = 0; j < MOCK_NESTED_DOMAIN_IOTLB_NUM; j++) + mock_nested->iotlb[j] = 0; + } else { + mock_nested->iotlb[inv.iotlb_id] = 0; + } + + inv.hw_error = hw_error; + rc = iommu_respond_struct_to_user_array(array, i, (void *)&inv, + sizeof(inv)); + if (rc) + break; + + processed++; + } + +out: + array->entry_num = processed; + return rc; +} + static struct iommu_domain_ops domain_nested_ops = { .free = mock_domain_free_nested, .attach_dev = mock_domain_nop_attach, + .cache_invalidate_user = mock_domain_cache_invalidate_user, }; static inline struct iommufd_hw_pagetable *