From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7CD9C31E5B for ; Tue, 18 Jun 2019 16:51:36 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BDAFB2084B for ; Tue, 18 Jun 2019 16:51:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="WaieeTGM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BDAFB2084B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tD6fvibuQQc9/PXtQ/g05lsJvOvqidGT5SoqjVjIuGw=; b=WaieeTGMVrUp6x PxSzzuoITbELNPXsxGTxbP/y7RhYwKbGLjKmHLWt0bNuH5aRWOruVeBYJDtxhtIQcSSPpI3arQFDp 3zOBd+w1LnZvS8cpTHGyaOov7RI02jgikyDq7WLnZ1119xHx+8zqzM/3HyyjaJFuNBZAuy7VYFIgO agLoLLnHvrCfLLJWrXmopmW+SvdbU9FXaXMtxTX+iDl/VEC/YWc5PoPzFi66LUGJnMNeE5eJNTxAv CHsvf/8M4fBG0RWCQGVfbX1u07lWUz+NTPD7ivqcjZZlqSmYCiHo76Y60+WtYI2Vdd/rvhRtm+7vS A8sJ0LCf8ZjuXGJp1WPQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hdHKY-0000Zc-7X; Tue, 18 Jun 2019 16:51:34 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hdHKV-0000ZG-LS for linux-arm-kernel@lists.infradead.org; Tue, 18 Jun 2019 16:51:32 +0000 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 271F6344; Tue, 18 Jun 2019 09:51:31 -0700 (PDT) Received: from fuggles.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 9019F3F246; Tue, 18 Jun 2019 09:51:30 -0700 (PDT) Date: Tue, 18 Jun 2019 17:51:28 +0100 From: Will Deacon To: Mark Brown Subject: Re: [PATCH 1/2] arm64: Expose ARMv8.5 CondM capability to userspace Message-ID: <20190618165128.GC4270@fuggles.cambridge.arm.com> References: <20190617112656.2614-1-broonie@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190617112656.2614-1-broonie@kernel.org> User-Agent: Mutt/1.11.1+86 (6f28e57d73f2) () X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190618_095131_743023_97308CE0 X-CRM114-Status: GOOD ( 13.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Catalin Marinas , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Mark, On Mon, Jun 17, 2019 at 12:26:55PM +0100, Mark Brown wrote: > ARMv8.5 adds new instructions XAFLAG and AXFLAG to translate the > representation of the results of floating point comparisons between the > native ARM format and an alternative format used by some software. Add > a hwcap allowing userspace to determine if they are present. > > Signed-off-by: Mark Brown > --- > Documentation/arm64/elf_hwcaps.txt | 4 ++++ > arch/arm64/include/asm/hwcap.h | 1 + > arch/arm64/include/uapi/asm/hwcap.h | 1 + > arch/arm64/kernel/cpufeature.c | 1 + > arch/arm64/kernel/cpuinfo.c | 1 + > 5 files changed, 8 insertions(+) > > diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt > index b73a2519ecf2..08e8e380a826 100644 > --- a/Documentation/arm64/elf_hwcaps.txt > +++ b/Documentation/arm64/elf_hwcaps.txt > @@ -207,6 +207,10 @@ HWCAP_FLAGM > > Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0001. > > +HWCAP_CONDM85 This should be referring to HWCAP2. Also, to dive in with the naming bikeshed, although CONDM85 does appear to be aligned with the architecture, we've already got HWCAP_FLAGM for the case when ID_AA64ISAR0_EL1.TS == 0b0001, so I think we're better off being consistent with ourselves and just having something like HWCAP2_FLAGM2 with the string "flagm2". With that change: Acked-by: Will Deacon Thanks, Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel