From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 869AD247295; Fri, 19 Sep 2025 18:38:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758307108; cv=none; b=K0a86+yWwbqI0G4wzLgLgb4wZcBVZEVwTe9xBVVLnBJPbuuoE9pMQt3Iiuyi3ZAykech5Pe0RummaUubSPWfP3d3+K9SimfLgMKj/q6Ld0qAck7UBUqh5YIydqc+Qbh8F7j+ilhquMXuEUg1hy4WaByw0yh8cks58Vk6XwN2xkU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758307108; c=relaxed/simple; bh=EeZzWFrfZxrU8fh2GXxBtvaOZgVq6ueEnBhBSJauFWs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=Zz1yvi1c5flFE7+GpIMdyNTyO3Qi+az8MKToN7UBUh73ufya3y3s1eJelM2yWNU6LxPj+KYT0NgIdPrCn7VpPCmGS9lw3m7HCBQjoArHIjtRMsd8vodX8h+p9RGAXb9AY318fZTar9eUH2v3B1GUTYfqJDuIZn6Ij25uVSiHLrA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=S1aIsfRY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="S1aIsfRY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50919C4CEF0; Fri, 19 Sep 2025 18:38:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758307108; bh=EeZzWFrfZxrU8fh2GXxBtvaOZgVq6ueEnBhBSJauFWs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S1aIsfRYpwgGG1ulRgCexm9tZ8cz18SxSmW+AJ/e1l9FzTrztVNzTIa5Y4SAAxR0W oipQkNRT+vAf9yvlaQ6ds6/i9hJOH70tMF9tvymO1jje7ABHNywjN41zug7yYaEY2+ wgN+TEhvZpe6htN23Fb+fdqpftk20KG985QTMQeZp+fYbMcm8BQn+JuLwUnfDTT7aP Ok01ljK2KHuj+tPXU7VVbRZ38bjhTepyoU1NlNyUfC5/4KMNXoyCzXmOzUlvtYcp/a sNHOglQ0n1CFJrEUf+lUxTwmRovEDIaSwrk7JuQFw5+0OzLM9TurShOAINtombvFWy DYgp0Wy26aCsQ== From: Will Deacon To: Catalin Marinas , Jonathan Corbet , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Shuah Khan , Mark Brown Cc: kernel-team@android.com, Will Deacon , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v4 0/2] arm64: Support FEAT_LSFE (Large System Float Extension) Date: Fri, 19 Sep 2025 19:38:17 +0100 Message-Id: <175828261879.3019927.22813258731218689.b4-ty@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250918-arm64-lsfe-v4-0-0abc712101c7@kernel.org> References: <20250918-arm64-lsfe-v4-0-0abc712101c7@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit 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