linux-kernel - Re: [PATCH v11 RESEND 4/9] arm64: Kconfig: Detect toolchain support for LSUI

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Message-ID: <20a2e113-7d53-4857-9cbb-9e4ea910b7d0@sirena.org.uk>
Date: Mon, 19 Jan 2026 15:54:13 +0000
From: Mark Brown <broonie@...nel.org>
To: Will Deacon <will@...nel.org>
Cc: Yeoreum Yun <yeoreum.yun@....com>, catalin.marinas@....com,
	maz@...nel.org, oliver.upton@...ux.dev, miko.lenczewski@....com,
	kevin.brodsky@....com, ardb@...nel.org, suzuki.poulose@....com,
	lpieralisi@...nel.org, yangyicong@...ilicon.com,
	scott@...amperecomputing.com, joey.gouly@....com,
	yuzenghui@...wei.com, pbonzini@...hat.com, shuah@...nel.org,
	mark.rutland@....com, arnd@...db.de,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kvmarm@...ts.linux.dev, kvm@...r.kernel.org,
	linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v11 RESEND 4/9] arm64: Kconfig: Detect toolchain support
 for LSUI

On Mon, Jan 19, 2026 at 03:50:43PM +0000, Will Deacon wrote:
> On Sun, Dec 14, 2025 at 11:22:43AM +0000, Yeoreum Yun wrote:

> > +config AS_HAS_LSUI
> > +	def_bool $(as-instr,.arch_extension lsui)
> > +	help
> > +	  Supported by LLVM 20+ and binutils 2.45+.

> This is an internal Kconfig variable so please drop the help text.

It would be useful to keep the information about supported compilers as
a comment though (as is done for some of the other toolchain feature
tests).

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