linux-kernel - Re: [PATCH v4 04/28] iommu/io-pgtable-arm: Move selftests to a separate file

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Message-ID: <20250915164517.GL882933@ziepe.ca>
Date: Mon, 15 Sep 2025 13:45:17 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: Mostafa Saleh <smostafa@...gle.com>
Cc: linux-kernel@...r.kernel.org, kvmarm@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
	maz@...nel.org, oliver.upton@...ux.dev, joey.gouly@....com,
	suzuki.poulose@....com, yuzenghui@...wei.com,
	catalin.marinas@....com, will@...nel.org, robin.murphy@....com,
	jean-philippe@...aro.org, qperret@...gle.com, tabba@...gle.com,
	mark.rutland@....com, praan@...gle.com
Subject: Re: [PATCH v4 04/28] iommu/io-pgtable-arm: Move selftests to a
 separate file

On Tue, Aug 19, 2025 at 09:51:32PM +0000, Mostafa Saleh wrote:
> Soon, io-pgtable-arm.c will be compiled as part of the KVM/arm64
> in the hypervisor object, which doesn't have many of the kernel APIs,
> as faux devices, printk...
> 
> We would need to factor this things outside of this file, this patch
> moves the selftests outside, which remove many of the kernel
> dependencies, which also is not needed by the hypervisor.
> Create io-pgtable-arm-kernel.c for that, and in the next patch
> the rest of the code is factored out.

Please send this as a stand alone patch, it looks like a good idea.

Also please add the boiler plate to wrap the selftest into a kunit and
use the usual kunit machinery. We alredy have an kunit for
smmuv3, it can just add another file to that.

Jason