From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-174.mta0.migadu.com (out-174.mta0.migadu.com [91.218.175.174]) (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 B8E321CCEE0 for ; Thu, 18 Sep 2025 20:57:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758229055; cv=none; b=Jq00ltTZ8iRE7n2nAFFSpWxeeIelsb1zapI66mLcnveDBm9+NH+CtSDtpTSK21ZoRGpeMu8+/vyX0uvJkTN2lzjXDXg7MfOhsuOJzB3FHULr4Eou/EZL9xwu7sAgp5COqdZ6cmkjuYjK3r6yHleD+yp1djOTyWoRvCB2iV4J77w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758229055; c=relaxed/simple; bh=13VJs7I563zMXcilTJ5ZSbYvZTg0GMtcoQCa3/06YfI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=MQQSrHcn6kOVI8tJvOLZdWh82zri4kiqsTtbqwMEHaj1SZjT055u8nD3kNEQmf8FKskLzF+Dy15S4hZto3nUOWIXzLjQu/ITF44q0hn/WFIhz/t1+YLqCe1yXqa6ZJwofVPbNfNLI9racDAvBpmD5efAFWl/+lxYrt7Y3MHXV8c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=hMwX8QrH; arc=none smtp.client-ip=91.218.175.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="hMwX8QrH" Date: Thu, 18 Sep 2025 13:57:13 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1758229041; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=YboiNlJLrHuwno2dTNAWyyWHcEmx4DdrrYbhMW2x15E=; b=hMwX8QrH4fVXAwsA6C23vCpsbnXMcPQ5RT3fH0rwp8436N2NIRDg5prPa4eJl3ts0ENGgl OnHiTWmb+Yba4LKkFNqLIietZ8lHLPmXh1JuiGOPdIJtj14t/ToyD4SSZmqzMts2ATW2cN q31pKLvfhA9Rnm/xi0Hw7bSQ3xPvRAA= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Oliver Upton To: Mark Brown Cc: Catalin Marinas , Will Deacon , Jonathan Corbet , Marc Zyngier , Joey Gouly , Suzuki K Poulose , Shuah Khan , 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 1/2] KVM: arm64: Expose FEAT_LSFE to guests Message-ID: References: <20250918-arm64-lsfe-v4-0-0abc712101c7@kernel.org> <20250918-arm64-lsfe-v4-1-0abc712101c7@kernel.org> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250918-arm64-lsfe-v4-1-0abc712101c7@kernel.org> X-Migadu-Flow: FLOW_OUT On Thu, Sep 18, 2025 at 08:42:06PM +0100, 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 state, expose the relevant ID register field to guests so > they can discover it. > > Signed-off-by: Mark Brown We also need a test in set_id_regs.c selftest for the writability of this new feature field. Otherwise: Reviewed-by: Oliver Upton Thanks, Oliver