Re: [PATCH v2 03/22] iommufd/viommu: Allow driver-specific user data for a vIOMMU object

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To: Nicolin Chen <nicolinc@xxxxxxxxxx>, jgg@xxxxxxxxxx, kevin.tian@xxxxxxxxx, corbet@xxxxxxx, will@xxxxxxxxxx
Subject: Re: [PATCH v2 03/22] iommufd/viommu: Allow driver-specific user data for a vIOMMU object
From: Baolu Lu <baolu.lu@xxxxxxxxxxxxxxx>
Date: Sun, 27 Apr 2025 14:36:13 +0800
Cc: bagasdotme@xxxxxxxxx, robin.murphy@xxxxxxx, joro@xxxxxxxxxx, thierry.reding@xxxxxxxxx, vdumpa@xxxxxxxxxx, jonathanh@xxxxxxxxxx, shuah@xxxxxxxxxx, jsnitsel@xxxxxxxxxx, nathan@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, yi.l.liu@xxxxxxxxx, mshavit@xxxxxxxxxx, praan@xxxxxxxxxx, zhangzekun11@xxxxxxxxxx, iommu@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-tegra@xxxxxxxxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx, patches@xxxxxxxxxxxxxxx, mochs@xxxxxxxxxx, alok.a.tiwari@xxxxxxxxxx, vasant.hegde@xxxxxxx
In-reply-to: <7031ae5ab6f625e73dbd51b074c2ff8a9923c731.1745646960.git.nicolinc@nvidia.com>
References: <cover.1745646960.git.nicolinc@nvidia.com> <7031ae5ab6f625e73dbd51b074c2ff8a9923c731.1745646960.git.nicolinc@nvidia.com>
User-agent: Mozilla Thunderbird

On 4/26/25 13:57, Nicolin Chen wrote:

The new type of vIOMMU for tegra241-cmdqv driver needs a driver-specific
user data. So, add data_len/uptr to the iommu_viommu_alloc uAPI and pass
it in via the viommu_alloc iommu op.

Reviewed-by: Jason Gunthorpe<jgg@xxxxxxxxxx>
Signed-off-by: Nicolin Chen<nicolinc@xxxxxxxxxx>


Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>

References:
- [PATCH v2 00/22] iommufd: Add vIOMMU infrastructure (Part-4 vCMDQ)
  - From: Nicolin Chen
- [PATCH v2 03/22] iommufd/viommu: Allow driver-specific user data for a vIOMMU object
  - From: Nicolin Chen

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