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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no 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 D8195C2BA19 for ; Wed, 15 Apr 2020 10:58:52 +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 A762920784 for ; Wed, 15 Apr 2020 10:58:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="tXwiS6Si"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="1HhYnu9M" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A762920784 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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=0P9vrJ2Px0GR8Rv48AL8mrtIFyYQRGefvGSSQNQwgXE=; b=tXwiS6Sib1FXNl d4niaJ01xiFNk9P3kfEFXpXpCqoELwk1Rolr785TxXHs1QAG8xcYmZD57kMsRniKj6V5TcdCprkMz AecS7i8sqwkft84GiZ+Cx6VS8XEcWPUv7SMS52X8UaVJKgJFvt7UC/K5jESFF00vWiOfIec5Ux67O 2GQqjFwL0dcAIyOUMX5T/lF3qVKOtabs+ZIiHGC61XhRCUXSSMvEH1GuvQr3y3MbpMBvXlyHXqVq2 gzmk12MBI+HRfFpvRttel3ovlQPHvRt5jqdzkUGMal1bvF+e5lG81iXRzXmWhLqU9cQH7ymPMhm99 vgJiubpt0uTvIwSxhgRA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOfkq-0002pB-9S; Wed, 15 Apr 2020 10:58:52 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jOfkn-0002os-Vw for linux-arm-kernel@lists.infradead.org; Wed, 15 Apr 2020 10:58:51 +0000 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8202320737; Wed, 15 Apr 2020 10:58:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586948329; bh=CREoP6ow54O+9uP6Nr3jiB5GlPGFSrwpvxq54PH6zc0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=1HhYnu9MIHu7uBu8iCaGrYgjMczZnXow3gS6bknWEk7L7PWw+q2APHOMia1+mGGLl SeoGP0GOp/cUK6gieqe9hrTGnTwDXpsnQ4vKEuUWPGomRvlRUSVx75sQcfMiG5xmdY mIKao2F9HAVTn5ug8w4JpxJQ8EpXIeSKzfpfVzLg= Date: Wed, 15 Apr 2020 11:58:44 +0100 From: Will Deacon To: Suzuki K Poulose Subject: Re: [PATCH 7/8] arm64: cpufeature: Relax checks for AArch32 support at EL[0-2] Message-ID: <20200415105843.GE12621@willie-the-truck> References: <20200414213114.2378-1-will@kernel.org> <20200414213114.2378-8-will@kernel.org> <714f124c-7eb7-b750-e98c-63da64ddae75@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <714f124c-7eb7-b750-e98c-63da64ddae75@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200415_035850_042859_BA37FFCF X-CRM114-Status: GOOD ( 13.44 ) 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: mark.rutland@arm.com, saiprakash.ranjan@codeaurora.org, anshuman.khandual@arm.com, maz@kernel.org, linux-kernel@vger.kernel.org, dianders@chromium.org, catalin.marinas@arm.com, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, 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 On Wed, Apr 15, 2020 at 11:50:58AM +0100, Suzuki K Poulose wrote: > On 04/14/2020 10:31 PM, Will Deacon wrote: > > We don't need to be quite as strict about mismatched AArch32 support, > > which is good because the friendly hardware folks have been busy > > mismatching this to their hearts' content. > > > > * We don't care about EL2 or EL3 (there are silly comments concerning > > the latter, so remove those) > > > > * EL1 support is gated by the ARM64_HAS_32BIT_EL1 capability and handled > > gracefully when a mismatch occurs > > > > * EL1 support is gated by the ARM64_HAS_32BIT_EL0 capability and handled > > s/EL1/EL0 > > > gracefully when a mismatch occurs > > > > Relax the AArch32 checks to FTR_NONSTRICT. > > Agreed. We should do something similar for the features exposed by the > ELF_HWCAP, of course in a separate series. Hmm, I didn't think we needed to touch the HWCAPs, as they're derived from the sanitised feature register values. What am I missing? Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel