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=-5.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 303BAC282DD for ; Fri, 10 Jan 2020 14:51:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1038D2072E for ; Fri, 10 Jan 2020 14:51:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728305AbgAJOvR (ORCPT ); Fri, 10 Jan 2020 09:51:17 -0500 Received: from foss.arm.com ([217.140.110.172]:45710 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727627AbgAJOvQ (ORCPT ); Fri, 10 Jan 2020 09:51:16 -0500 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 599C830E; Fri, 10 Jan 2020 06:51:16 -0800 (PST) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.197.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 26B913F6C4; Fri, 10 Jan 2020 06:51:15 -0800 (PST) Date: Fri, 10 Jan 2020 14:51:13 +0000 From: Catalin Marinas To: Suzuki K Poulose Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, maz@kernel.org, mark.rutland@arm.com, dave.martin@arm.com, ard.biesheuvel@linaro.org, christoffer.dall@arm.com Subject: Re: [PATCH v2 4/7] arm64: cpufeature: Set the FP/SIMD compat HWCAP bits properly Message-ID: <20200110145112.GF8786@arrakis.emea.arm.com> References: <20191217183402.2259904-1-suzuki.poulose@arm.com> <20191217183402.2259904-5-suzuki.poulose@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191217183402.2259904-5-suzuki.poulose@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Dec 17, 2019 at 06:33:59PM +0000, Suzuki K Poulose wrote: > We set the compat_elf_hwcap bits unconditionally on arm64 to > include the VFP and NEON support. However, the FP/SIMD unit > is optional on Arm v8 and thus could be missing. We already > handle this properly in the kernel, but still advertise to > the COMPAT applications that the VFP is available. Fix this > to make sure we only advertise when we really have them. > > Fixes: 82e0191a1aa11abf ("arm64: Support systems without FP/ASIMD") > Cc: Will Deacon > Cc: Catalin Marinas > Cc: Mark Rutland > Signed-off-by: Suzuki K Poulose Reviewed-by: Catalin Marinas