Date:   Mon, 13 Feb 2023 10:51:20 -0400
From:   Jason Gunthorpe <jgg@nvidia.com>
To:     Yi Liu <yi.l.liu@intel.com>
Cc:     joro@8bytes.org, alex.williamson@redhat.com, kevin.tian@intel.com,
        robin.murphy@arm.com, 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.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,
        baolu.lu@linux.intel.com
Subject: Re: [PATCH 2/6] iommu/vt-d: Implement hw_info for iommu capability
 query
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On Wed, Feb 08, 2023 at 08:16:38PM -0800, Yi Liu wrote:
> From: Lu Baolu <baolu.lu@linux.intel.com>
> 
> To support nested translation in the userspace, it should check the
> underlying hardware information for the capabilities.
> 
> Add intel_iommu_hw_info() to report cap_reg and ecap_reg information.
> 
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
> Signed-off-by: Yi Liu <yi.l.liu@intel.com>
> Signed-off-by: Nicolin Chen <nicolinc@nvidia.com>
> Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
> ---
>  drivers/iommu/intel/iommu.c  | 19 +++++++++++++++++++
>  drivers/iommu/intel/iommu.h  |  1 +
>  include/uapi/linux/iommufd.h | 21 +++++++++++++++++++++
>  3 files changed, 41 insertions(+)

This should come after the next patch in the series

Jason