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Date: Mon, 22 Apr 2024 18:21:08 +0100
From: Will Deacon <will@kernel.org>
To: Dev Jain <dev.jain@arm.com>
Cc: shuah@kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
	Anshuman.Khandual@arm.com, suzuki.poulose@arm.com,
	ryan.roberts@arm.com, rob.herring@arm.com, Catalin.Marinas@arm.com,
	broonie@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk
Subject: Re: [PATCH v2 0/4] A new selftests/ directory for arm compatibility
 testing
Message-ID: <20240422172108.GD6223@willie-the-truck>
References: <20240422070717.2194201-1-dev.jain@arm.com>
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On Mon, Apr 22, 2024 at 12:37:13PM +0530, Dev Jain wrote:
> This series introduces the selftests/arm directory, which tests 32 and 64-bit
> kernel compatibility with 32-bit ELFs running on the Aarch platform.
> The need for this bucket of tests is that 32 bit applications built on legacy
> ARM architecture must not break on the new Aarch64 platforms and the 64-bit
> kernel. The kernel must emulate the data structures, system calls and the
> registers according to Aarch32, when running a 32-bit process; this directory
> fills that testing requirement.
> 
> One may find similarity between this directory and selftests/arm64; it is
> advisable to refer to that since a lot has been copied from there itself.

Isn't this going to be difficult to maintain if we have two divergent copies
of the same stuff? From a very quick skim, a bunch of the signals stuff is
idential to what we have on arm64...

Will