linux-kernel - Re: [PATCH v4 3/3] iommu: Drop sw_msi from iommu

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Message-ID: <20250317202050.GX9311@nvidia.com>
Date: Mon, 17 Mar 2025 17:20:50 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: kevin.tian@...el.com, robin.murphy@....com, joro@...tes.org,
	will@...nel.org, iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 3/3] iommu: Drop sw_msi from iommu_domain

On Thu, Mar 06, 2025 at 01:00:49PM -0800, Nicolin Chen wrote:
> There are only two sw_msi implementations in the entire system, thus it's
> not very necessary to have an sw_msi pointer.
> 
> Instead, check domain->cookie_type to call the two sw_msi implementations
> directly from the core code.
> 
> Suggested-by: Robin Murphy <robin.murphy@....com>
> Reviewed-by: Robin Murphy <robin.murphy@....com>
> Reviewed-by: Kevin Tian <kevin.tian@...el.com>
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  drivers/iommu/dma-iommu.h            |  9 +++++++++
>  include/linux/iommu.h                | 15 ---------------
>  drivers/iommu/dma-iommu.c            | 14 ++------------
>  drivers/iommu/iommu.c                | 17 +++++++++++++++--
>  drivers/iommu/iommufd/hw_pagetable.c |  3 ---
>  5 files changed, 26 insertions(+), 32 deletions(-)

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

Jason