linux-kernel - Re: [PATCH v3 10/23] iommufd/viommu: Introduce IOMMUFD_OBJ

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Message-ID: <cc9d2ff7-ce8c-419a-970c-cec88572c0c8@amd.com>
Date: Tue, 6 May 2025 14:47:22 +0530
From: Vasant Hegde <vasant.hegde@....com>
To: Nicolin Chen <nicolinc@...dia.com>, jgg@...dia.com, kevin.tian@...el.com,
 corbet@....net, will@...nel.org
Cc: 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
Subject: Re: [PATCH v3 10/23] iommufd/viommu: Introduce IOMMUFD_OBJ_VQUEUE and
 its related struct



On 5/2/2025 4:31 AM, Nicolin Chen wrote:
> Add a new IOMMUFD_OBJ_VQUEUE with an iommufd_vqueue structure representing
> a HW-accelerated queue type of physical IOMMU's passed to a user space VM.
> This vQUEUE object, is a subset of vIOMMU resources of a physical IOMMU's,
> such as:
>  - NVIDIA's Virtual Command Queue
>  - AMD vIOMMU's Command Buffer, Event Log Buffer, and PPR Log Buffer
> 
> Introduce a struct iommufd_vqueue and an allocator iommufd_vqueue_alloc().
> Also, add a pair of viommu ops for iommufd to forward user space ioctls to
> IOMMU drivers.
> 
> Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>
> Reviewed-by: Pranjal Shrivastava <praan@...gle.com>
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>


Reviewed-by: Vasant Hegde <vasant.hegde@....com>

-Vasant