linux-kernel - Re: [PATCH v4 0/2] arm64: Support FEAT_LSFE (Large System Float Extension)

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Message-Id: <175828261879.3019927.22813258731218689.b4-ty@kernel.org>
Date: Fri, 19 Sep 2025 19:38:17 +0100
From: Will Deacon <will@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>,
	Jonathan Corbet <corbet@....net>,
	Marc Zyngier <maz@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Joey Gouly <joey.gouly@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Shuah Khan <shuah@...nel.org>,
	Mark Brown <broonie@...nel.org>
Cc: kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	kvmarm@...ts.linux.dev,
	linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v4 0/2] arm64: Support FEAT_LSFE (Large System Float Extension)

On Thu, 18 Sep 2025 20:42:05 +0100, Mark Brown wrote:
> FEAT_LSFE is optional from v9.5, it adds new instructions for atomic
> memory operations with floating point values.  We have no immediate use
> for it in kernel, provide a hwcap so userspace can discover it and allow
> the ID register field to be exposed to KVM guests.
> 
> 

Applied selftest update to arm64 (for-next/selftests), thanks!

[2/2] kselftest/arm64: Add lsfe to the hwcaps test
      https://git.kernel.org/arm64/c/777fb19ed8d6

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev