linux-kernel - Re: [PATCH v1 02/16] iommufd/viommu: Allow driver-specific user data for a vIOMMU object

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Message-ID: <20250423131633.GG1648741@nvidia.com>
Date: Wed, 23 Apr 2025 10:16:33 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: kevin.tian@...el.com, corbet@....net, will@...nel.org,
	robin.murphy@....com, joro@...tes.org, thierry.reding@...il.com,
	vdumpa@...dia.com, jonathanh@...dia.com, shuah@...nel.org,
	praan@...gle.com, nathan@...nel.org, peterz@...radead.org,
	yi.l.liu@...el.com, jsnitsel@...hat.com, mshavit@...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
Subject: Re: [PATCH v1 02/16] iommufd/viommu: Allow driver-specific user data
 for a vIOMMU object

On Thu, Apr 10, 2025 at 11:37:41PM -0700, 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.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  include/uapi/linux/iommufd.h   | 6 ++++++
>  drivers/iommu/iommufd/viommu.c | 8 +++++++-
>  2 files changed, 13 insertions(+), 1 deletion(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason