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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

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