linux-kernel - Re: [PATCH v6 16/25] iommu: Allow an input type in hw

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Message-ID: <b60267c2-df8c-4833-a299-62f29004fb6e@linux.intel.com>
Date: Mon, 16 Jun 2025 19:53:55 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: Nicolin Chen <nicolinc@...dia.com>, jgg@...dia.com, kevin.tian@...el.com,
 corbet@....net, will@...nel.org
Cc: baolu.lu@...ux.intel.com, bagasdotme@...il.com, robin.murphy@....com,
 joro@...tes.org, thierry.reding@...il.com, vdumpa@...dia.com,
 jonathanh@...dia.com, shuah@...nel.org, jsnitsel@...hat.com,
 nathan@...nel.org, peterz@...radead.org, yi.l.liu@...el.com,
 mshavit@...gle.com, praan@...gle.com, zhangzekun11@...wei.com,
 iommu@...ts.linux.dev, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-tegra@...r.kernel.org, linux-kselftest@...r.kernel.org,
 patches@...ts.linux.dev, mochs@...dia.com, alok.a.tiwari@...cle.com,
 vasant.hegde@....com, dwmw2@...radead.org
Subject: Re: [PATCH v6 16/25] iommu: Allow an input type in hw_info op

On 6/14/2025 3:14 PM, Nicolin Chen wrote:
> The hw_info uAPI will support a bidirectional data_type field that can be
> used as an input field for user space to request for a specific info data.
> 
> To prepare for the uAPI update, change the iommu layer first:
>   - Add a new IOMMU_HW_INFO_TYPE_DEFAULT as an input, for which driver can
>     output its only (or firstly) supported type
>   - Update the kdoc accordingly
>   - Roll out the type validation in the existing drivers
> 
> Reviewed-by: Kevin Tian<kevin.tian@...el.com>
> Reviewed-by: Jason Gunthorpe<jgg@...dia.com>
> Signed-off-by: Nicolin Chen<nicolinc@...dia.com>

Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>