linux-kernel - Re: [PATCH v4 4/4] iommufd/selftest: Add coverage for IOMMU_GET_HW

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Message-ID: <ZL66TtuWZXhxWFKP@nvidia.com>
Date:   Mon, 24 Jul 2023 14:52:14 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Yi Liu <yi.l.liu@...el.com>
Cc:     joro@...tes.org, alex.williamson@...hat.com, kevin.tian@...el.com,
        robin.murphy@....com, baolu.lu@...ux.intel.com, cohuck@...hat.com,
        eric.auger@...hat.com, nicolinc@...dia.com, kvm@...r.kernel.org,
        mjrosato@...ux.ibm.com, chao.p.peng@...ux.intel.com,
        yi.y.sun@...ux.intel.com, peterx@...hat.com, jasowang@...hat.com,
        shameerali.kolothum.thodi@...wei.com, lulu@...hat.com,
        suravee.suthikulpanit@....com, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        zhenzhong.duan@...el.com
Subject: Re: [PATCH v4 4/4] iommufd/selftest: Add coverage for
 IOMMU_GET_HW_INFO ioctl

On Mon, Jul 24, 2023 at 03:59:36AM -0700, Yi Liu wrote:
> diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
> index 70353e68e599..f13df84f6b42 100644
> --- a/tools/testing/selftests/iommu/iommufd_utils.h
> +++ b/tools/testing/selftests/iommu/iommufd_utils.h
> @@ -348,3 +348,29 @@ static void teardown_iommufd(int fd, struct __test_metadata *_metadata)
>  	})
>  
>  #endif
> +
> +static int _test_cmd_get_hw_info(int fd, __u32 device_id,
> +				 __u32 data_len, void *data)

void * data,size_t data_len

Jason