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=-10.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,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 07AEFC4332D for ; Fri, 20 Mar 2020 15:10:02 +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 C5AB12072D for ; Fri, 20 Mar 2020 15:10:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="j6QPf94D" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C5AB12072D 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=WrO0uk64UGHugrfJE+X0creqr6tgl7R9NrPWjO/GG64=; b=j6QPf94DjtLm6n WGYDsC7udCk3kuHIVc4K3y/NdX18K6nXXYuq+WX/GEkugiNHq7wyiKGPJUjGN4NfXr3cRUl+5P62p hRNrcs0Rr5740tKKGBoiIIYca3u2FRKDyXm8rI7mhwc6zSz21RXqws/9Tl4xgUtNlw7T6MrhBdB/N 9Eqeo4jp1n9P7ee41cyayiEflh26RvJW3aeWM24AAhJTK/eUYf070mgJKSSPTJg5ZFbZhFFSWqiEr a1hxINL5Z3hXYQCwKRfinLWh1dcs0l39DuyWh33ZaEfnQXYL+mn6B3Yg4QLoVX3TkWcJbvSuCEz1e das6lGyRJlHCeC/3X/dw==; 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 1jFJHd-0000r4-9q; Fri, 20 Mar 2020 15:10:01 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jFJHa-0000qZ-5l for linux-arm-kernel@lists.infradead.org; Fri, 20 Mar 2020 15:09:59 +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 777F31FB; Fri, 20 Mar 2020 08:09:57 -0700 (PDT) Received: from mbp (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 54EC03F792; Fri, 20 Mar 2020 08:09:55 -0700 (PDT) Date: Fri, 20 Mar 2020 15:09:52 +0000 From: Catalin Marinas To: Nick Desaulniers Subject: Re: [PATCH] arm64: Kconfig: verify binutils support for ARM64_PTR_AUTH Message-ID: <20200320150952.GD29214@mbp> References: <1584090304-18043-17-git-send-email-amit.kachhap@arm.com> <20200319181951.102662-1-ndesaulniers@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200319181951.102662-1-ndesaulniers@google.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-20200320_080958_262949_070293F4 X-CRM114-Status: UNSURE ( 9.03 ) X-CRM114-Notice: Please train this message. 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, keescook@chromium.org, suzuki.poulose@arm.com, kristina.martsenko@arm.com, ardb@kernel.org, yamada.masahiro@socionext.com, broonie@kernel.org, james.morse@arm.com, clang-built-linux@googlegroups.com, ramana.radhakrishnan@arm.com, amit.kachhap@arm.com, vincenzo.frascino@arm.com, will@kernel.org, Dave.Martin@arm.com, 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 Thu, Mar 19, 2020 at 11:19:51AM -0700, Nick Desaulniers wrote: > Clang relies on GNU as from binutils to assemble the Linux kernel, > currently. A recent patch to enable the armv8.3-a extension for pointer > authentication checked for compiler support of the relevant flags. > Everything works with binutils 2.34+, but for older versions we observe > assembler errors: > > /tmp/vgettimeofday-36a54b.s: Assembler messages: > /tmp/vgettimeofday-36a54b.s:40: Error: unknown pseudo-op: `.cfi_negate_ra_state' > > When compiling with Clang, require the assembler to support > .cfi_negate_ra_state directives, in order to support CONFIG_ARM64_PTR_AUTH. > > Link: https://github.com/ClangBuiltLinux/linux/issues/938 > Signed-off-by: Nick Desaulniers Queued. Thanks. -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel