linux-kernel - Re: [PATCH v1 07/16] iommufd/viommu: Add driver-allocated vDEVICE support

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Message-ID: <20250423133642.GJ1648741@nvidia.com>
Date: Wed, 23 Apr 2025 10:36:42 -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 07/16] iommufd/viommu: Add driver-allocated vDEVICE
 support

On Thu, Apr 10, 2025 at 11:37:46PM -0700, Nicolin Chen wrote:
> To allow IOMMU drivers to allocate own vDEVICE structures, move the struct
> iommufd_vdevice to the public header and provide a pair of viommu ops.
> 
> The iommufd_vdevice_alloc_ioctl will prioritize the callback function from
> the viommu ops, i.e. a driver-allocated vDEVICE.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  drivers/iommu/iommufd/iommufd_private.h |  8 -------
>  include/linux/iommufd.h                 | 32 +++++++++++++++++++++++++
>  drivers/iommu/iommufd/viommu.c          |  9 ++++++-
>  3 files changed, 40 insertions(+), 9 deletions(-)

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

Jason