All of lore.kernel.org
 help / color / mirror / Atom feed
From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Mark Brown <broonie@kernel.org>
Cc: Will Deacon <will@kernel.org>,
	catalin.marinas@arm.com, maz@kernel.org, oliver.upton@linux.dev,
	miko.lenczewski@arm.com, kevin.brodsky@arm.com, ardb@kernel.org,
	suzuki.poulose@arm.com, lpieralisi@kernel.org,
	yangyicong@hisilicon.com, scott@os.amperecomputing.com,
	joey.gouly@arm.com, yuzenghui@huawei.com, pbonzini@redhat.com,
	shuah@kernel.org, mark.rutland@arm.com, arnd@arndb.de,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev,
	kvm@vger.kernel.org, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v11 RESEND 4/9] arm64: Kconfig: Detect toolchain support for LSUI
Date: Tue, 20 Jan 2026 11:35:52 +0000	[thread overview]
Message-ID: <aW9omBgyHyI4267b@e129823.arm.com> (raw)
In-Reply-To: <20a2e113-7d53-4857-9cbb-9e4ea910b7d0@sirena.org.uk>

> 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).

With some comments from other thread,
What about this?

+menu "ARMv9.6 architectural features"
+
+config ARM64_LSUI
+       bool "Support Unprivileged Load Store Instructions (LSUI)"
+       default y
+       depends on AS_HAS_LSUI && !CPU_BIG_ENDIAN
+       help
+         The Unprivileged Load Store Instructions (LSUI) provides
+         variants load/store instructions that access user-space memory
+         from the kernel without clearing PSTATE.PAN bit.
+
+         This feature is supported by LLVM 20+ and binutils 2.45+.
+
+endmenu # "ARMv9.6 architectural feature"
+
 config AS_HAS_LSUI
        def_bool $(as-instr,.arch_extension lsui)
-       help
-         Supported by LLVM 20+ and binutils 2.45+.


--
Sincerely,
Yeoreum Yun

  reply	other threads:[~2026-01-20 11:37 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-12-14 11:22 [PATCH v11 RESEND 0/9] support FEAT_LSUI Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 1/9] arm64: cpufeature: add FEAT_LSUI Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 2/9] KVM: arm64: expose FEAT_LSUI to guest Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 3/9] KVM: arm64: kselftest: set_id_regs: add test for FEAT_LSUI Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 4/9] arm64: Kconfig: Detect toolchain support for LSUI Yeoreum Yun
2026-01-19 15:50   ` Will Deacon
2026-01-19 15:54     ` Mark Brown
2026-01-20 11:35       ` Yeoreum Yun [this message]
2025-12-14 11:22 ` [PATCH v11 RESEND 5/9] arm64: futex: refactor futex atomic operation Yeoreum Yun
2026-01-19 15:57   ` Will Deacon
2026-01-19 22:19     ` Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 6/9] arm64: futex: support futex with FEAT_LSUI Yeoreum Yun
2026-01-19 16:37   ` Will Deacon
2026-01-19 22:17     ` Yeoreum Yun
2026-01-20 15:44       ` Yeoreum Yun
2026-01-21 13:48       ` Will Deacon
2026-01-21 14:16         ` Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 7/9] arm64: separate common LSUI definitions into lsui.h Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 8/9] arm64: armv8_deprecated: convert user_swpX to inline function Yeoreum Yun
2025-12-14 11:22 ` [PATCH v11 RESEND 9/9] arm64: armv8_deprecated: apply FEAT_LSUI for swpX emulation Yeoreum Yun
2025-12-15  9:33   ` Marc Zyngier
2025-12-15  9:56     ` Yeoreum Yun
2026-01-19 15:34       ` Will Deacon
2026-01-19 22:32         ` Yeoreum Yun
2026-01-20  9:32           ` Yeoreum Yun
2026-01-20  9:46           ` Mark Rutland
2026-01-20 10:07             ` Yeoreum Yun
2026-01-20 11:50               ` Will Deacon
2026-01-20 12:14                 ` Yeoreum Yun
2026-01-20 17:59                 ` Yeoreum Yun
2026-01-21 13:56                   ` Will Deacon
2026-01-21 14:51                     ` Yeoreum Yun
2026-01-21 16:20                       ` Will Deacon
2026-01-21 16:31                         ` Yeoreum Yun
2026-01-21 16:36                           ` Will Deacon
2026-01-21 16:51                             ` Yeoreum Yun
2025-12-31 10:07 ` [PATCH v11 RESEND 0/9] support FEAT_LSUI Yeoreum Yun

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=aW9omBgyHyI4267b@e129823.arm.com \
    --to=yeoreum.yun@arm.com \
    --cc=ardb@kernel.org \
    --cc=arnd@arndb.de \
    --cc=broonie@kernel.org \
    --cc=catalin.marinas@arm.com \
    --cc=joey.gouly@arm.com \
    --cc=kevin.brodsky@arm.com \
    --cc=kvm@vger.kernel.org \
    --cc=kvmarm@lists.linux.dev \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-kselftest@vger.kernel.org \
    --cc=lpieralisi@kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=maz@kernel.org \
    --cc=miko.lenczewski@arm.com \
    --cc=oliver.upton@linux.dev \
    --cc=pbonzini@redhat.com \
    --cc=scott@os.amperecomputing.com \
    --cc=shuah@kernel.org \
    --cc=suzuki.poulose@arm.com \
    --cc=will@kernel.org \
    --cc=yangyicong@hisilicon.com \
    --cc=yuzenghui@huawei.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.