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[34.143.210.2]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22db4dbd6f7sm86915695ad.76.2025.04.28.11.56.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Apr 2025 11:56:42 -0700 (PDT) Date: Mon, 28 Apr 2025 18:56:31 +0000 From: Pranjal Shrivastava To: Nicolin Chen Cc: jgg@nvidia.com, kevin.tian@intel.com, corbet@lwn.net, will@kernel.org, bagasdotme@gmail.com, robin.murphy@arm.com, joro@8bytes.org, thierry.reding@gmail.com, vdumpa@nvidia.com, jonathanh@nvidia.com, shuah@kernel.org, jsnitsel@redhat.com, nathan@kernel.org, peterz@infradead.org, yi.l.liu@intel.com, mshavit@google.com, zhangzekun11@huawei.com, iommu@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-kselftest@vger.kernel.org, patches@lists.linux.dev, mochs@nvidia.com, alok.a.tiwari@oracle.com, vasant.hegde@amd.com Subject: Re: [PATCH v2 06/22] iommufd/selftest: Support user_data in mock_viommu_alloc Message-ID: References: <786cd49df9fb437790b7dba53165e4316747913b.1745646960.git.nicolinc@nvidia.com> Precedence: bulk X-Mailing-List: linux-tegra@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <786cd49df9fb437790b7dba53165e4316747913b.1745646960.git.nicolinc@nvidia.com> On Fri, Apr 25, 2025 at 10:58:01PM -0700, Nicolin Chen wrote: > Add a simple user_data for an input-to-output loopback test. > > Signed-off-by: Nicolin Chen > --- > drivers/iommu/iommufd/iommufd_test.h | 13 +++++++++++++ > drivers/iommu/iommufd/selftest.c | 19 +++++++++++++++++++ > 2 files changed, 32 insertions(+) > > diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h > index 1cd7e8394129..fbf9ecb35a13 100644 > --- a/drivers/iommu/iommufd/iommufd_test.h > +++ b/drivers/iommu/iommufd/iommufd_test.h > @@ -227,6 +227,19 @@ struct iommu_hwpt_invalidate_selftest { > > #define IOMMU_VIOMMU_TYPE_SELFTEST 0xdeadbeef > > +/** > + * struct iommu_viommu_selftest - vIOMMU data for Mock driver > + * (IOMMU_VIOMMU_TYPE_SELFTEST) > + * @in_data: Input random data from user space > + * @out_data: Output data (matching @in_data) to user space > + * > + * Simply set @out_data=@in_data for a loopback test > + */ > +struct iommu_viommu_selftest { > + __u32 in_data; > + __u32 out_data; > +}; > + > /* Should not be equal to any defined value in enum iommu_viommu_invalidate_data_type */ > #define IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST 0xdeadbeef > #define IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST_INVALID 0xdadbeef > diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c > index 8b8ba4fb91cd..b04bd2fbc53d 100644 > --- a/drivers/iommu/iommufd/selftest.c > +++ b/drivers/iommu/iommufd/selftest.c > @@ -740,16 +740,35 @@ mock_viommu_alloc(struct device *dev, struct iommu_domain *domain, > { > struct mock_iommu_device *mock_iommu = > iommu_get_iommu_dev(dev, struct mock_iommu_device, iommu_dev); > + struct iommu_viommu_selftest data; > struct mock_viommu *mock_viommu; > + int rc; > > if (viommu_type != IOMMU_VIOMMU_TYPE_SELFTEST) > return ERR_PTR(-EOPNOTSUPP); > > + if (user_data) { > + rc = iommu_copy_struct_from_user( > + &data, user_data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data); > + if (rc) > + return ERR_PTR(rc); > + } > + > mock_viommu = iommufd_viommu_alloc(ictx, struct mock_viommu, core, > &mock_viommu_ops); > if (IS_ERR(mock_viommu)) > return ERR_CAST(mock_viommu); > > + if (user_data) { > + data.out_data = data.in_data; > + rc = iommu_copy_struct_to_user( > + user_data, &data, IOMMU_VIOMMU_TYPE_SELFTEST, out_data); > + if (rc) { > + iommufd_struct_destroy(ictx, mock_viommu, core); > + return ERR_PTR(rc); > + } > + } > + > refcount_inc(&mock_iommu->users); > return &mock_viommu->core; > } Builds fine for me. Reviewed-by: Pranjal Shrivastava > -- > 2.43.0 >