linux-kernel - Re: [PATCH v4 0/3] vfio: handle DMA map/unmap up to the addressable limit

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Message-ID: <20251021123617.GT3938986@ziepe.ca>
Date: Tue, 21 Oct 2025 09:36:17 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Alex Mastro <amastro@...com>
Cc: Alex Williamson <alex.williamson@...hat.com>,
	Alejandro Jimenez <alejandro.j.jimenez@...cle.com>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/3] vfio: handle DMA map/unmap up to the addressable
 limit

On Sun, Oct 12, 2025 at 10:32:23PM -0700, Alex Mastro wrote:
> This patch series aims to fix vfio_iommu_type.c to support 
> VFIO_IOMMU_MAP_DMA and VFIO_IOMMU_UNMAP_DMA operations targeting IOVA
> ranges which lie against the addressable limit. i.e. ranges where
> iova_start + iova_size would overflow to exactly zero.

I didn't try to look through all the math changes but it looks like
the right thing to do to me

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

Jason