From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 18E38221726; Mon, 30 Jun 2025 10:05:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751277924; cv=none; b=PM0pBbnMlS+QNEzQzDlbLZMTGbY/D9PHz31qd50cOBOXUc7Fr8Ux3SI7ibzwTNU1ANaL7jsb2ZOv8re5fQHlLPWJSd3qOOwF+RiVlb9ZnjdMN4EJoC+6XtCUlStpzGGwTCFvwf1W0tpMNSIzxslmNBDMm5Fr2YlTtjjR7s9mI9A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751277924; c=relaxed/simple; bh=QQGT174PX3/LjslGR9uakewdT3W7VpHe5+lxPz565X8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=mA52p1yLmBL66fawq7c0KWpEd2ywiqNfhfiLHonWCXR6pKP/10W2pgD3Nz4oNR5nAjFQe04lph4yeDQQ2Qb7GAmDjB1R5iKhP2u6maS0klSOMIAN2QkAFp54RWmEkGyUG7ilyqPYSMTD3cU/J1QugO30FZ2s58Oz1vov8/EkwSo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 6CA581D34; Mon, 30 Jun 2025 03:05:06 -0700 (PDT) Received: from [10.1.196.46] (e134344.arm.com [10.1.196.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 14EF53F58B; Mon, 30 Jun 2025 03:05:19 -0700 (PDT) Message-ID: <77dd46da-85ea-442a-a05e-d54c56b51786@arm.com> Date: Mon, 30 Jun 2025 11:05:18 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/3] arm64/hwcap: Add hwcap for FEAT_LSFE To: Mark Brown , Catalin Marinas , Will Deacon , Jonathan Corbet , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Shuah Khan Cc: 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 References: <20250627-arm64-lsfe-v1-0-68351c4bf741@kernel.org> <20250627-arm64-lsfe-v1-1-68351c4bf741@kernel.org> Content-Language: en-US From: Ben Horgan In-Reply-To: <20250627-arm64-lsfe-v1-1-68351c4bf741@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/27/25 18:20, Mark Brown wrote: > FEAT_LSFE (Large System Float Extension), providing atomic floating point > memory operations, is optional from v9.5. This feature adds no new > architectural stare and we have no immediate use for it in the kernel so > simply provide a hwcap for it to support discovery by userspace. nit: s/stare/state/ Thanks, Ben