linux-kernel - Re: [PATCH 2/6] arm64/Kconfig: add LSUI Kconfig

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Message-ID: <aEmXNw01W6IosBXt@e129823.arm.com>
Date: Wed, 11 Jun 2025 15:48:23 +0100
From: Yeoreum Yun <yeoreum.yun@....com>
To: Mark Brown <broonie@...nel.org>
Cc: catalin.marinas@....com, will@...nel.org, maz@...nel.org,
	oliver.upton@...ux.dev, ardb@...nel.org, frederic@...nel.org,
	james.morse@....com, joey.gouly@....com,
	scott@...amperecomputing.com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/6] arm64/Kconfig: add LSUI Kconfig

Hi Mark,

> On Wed, Jun 11, 2025 at 11:49:12AM +0100, Yeoreum Yun wrote:
>
> > +menu "v9.6 architectural features"
> > +
> > +config AS_HAS_LSUI
> > +	def_bool $(as-instr,.arch_extension lsui)
> > +
> > +endmenu # "v9.6 architectural features"
> > +
>
> This is adding a menu with no user selectable options, does that not
> result in a confusing user experience?We do often add toolchain
> feature checks inside the menus but that's usually associated with
> hiding a user selectable option, if there isn't one (or any other option
> for that arch version yet) we should probably put the check elsewhere.

Well even the v9.4 menu can be printed a menu with no user selcatable
optoins when UPROBE is enabled (ARM64_GCS depend on !UPROBE).
But without any selectable options adding the menu seems weird as you said.

Like AS_HAS_MOPS, let me define AS_HAS_LSUI without menu.
I'll remove the menu entry.

Thanks.

--
Sincerely,
Yeoreum Yun