linux-kernel - Re: [PATCH v9 17/29] iommufd: Add mmap interface

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Message-ID: <20250714120308.GK1951027@nvidia.com>
Date: Mon, 14 Jul 2025 09:03:08 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Arnd Bergmann <arnd@...db.de>
Cc: Nicolin Chen <nicolinc@...dia.com>, Kevin Tian <kevin.tian@...el.com>,
	Jonathan Corbet <corbet@....net>,
	Bagas Sanjaya <bagasdotme@...il.com>, Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>, Joerg Roedel <joro@...tes.org>,
	Thierry Reding <thierry.reding@...il.com>, vdumpa@...dia.com,
	Jon Hunter <jonathanh@...dia.com>, shuah <shuah@...nel.org>,
	jsnitsel@...hat.com, Nathan Chancellor <nathan@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>, Yi Liu <yi.l.liu@...el.com>,
	mshavit@...gle.com, praan@...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, mochs@...dia.com,
	ALOK TIWARI <alok.a.tiwari@...cle.com>, vasant.hegde@....com,
	David Woodhouse <dwmw2@...radead.org>,
	Baolu Lu <baolu.lu@...ux.intel.com>
Subject: Re: [PATCH v9 17/29] iommufd: Add mmap interface

On Mon, Jul 14, 2025 at 08:08:21AM +0200, Arnd Bergmann wrote:
 
> The mtree_alloc_range() interface explicitly operates on 'unsigned long'
> address values, so I don't see an immediate workaround for this that would
> make it work on these machines. On the other hand, 

I fixed this already, PHYS_ADDR_MAX was just wrong, it should be
ULONG_MAX. The thing wasn't a physaddr in the first place.

Jason