linux-kernel - Re: [PATCH] iommu/dma: Document min_align

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Date: Wed, 6 Mar 2024 17:40:31 +0100
From: Joerg Roedel <joro@...tes.org>
To: Robin Murphy <robin.murphy@....com>
Cc: iommu@...ts.linux.dev, linux-kernel@...r.kernel.org, will@...nel.org,
	mhklinux@...look.com, petr@...arici.cz, hch@....de
Subject: Re: [PATCH] iommu/dma: Document min_align_mask assumption

On Mon, Mar 04, 2024 at 12:05:42PM +0000, Robin Murphy wrote:
> iommu-dma does not explicitly reference min_align_mask since we already
> assume that that will be less than or equal to any typical IOVA granule.
> We wouldn't realistically expect to see the case where it is larger, and
> that would be non-trivial to support, however for the sake of reasoning
> (particularly around the interaction with SWIOTLB), let's clearly
> enforce the assumption.
> 
> Signed-off-by: Robin Murphy <robin.murphy@....com>
> ---
>  drivers/iommu/dma-iommu.c | 5 +++++
>  1 file changed, 5 insertions(+)

Applied, thanks Robin.