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=-16.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=unavailable 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 C0D89C43457 for ; Mon, 12 Oct 2020 08:31:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7267B20757 for ; Mon, 12 Oct 2020 08:31:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602491491; bh=S0GqfGRh8/Tl7HdVRLMI52r7qak2HNoCB3IVK6Zs4T4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=shb07fAZ8NBgQ5Fuzba0xdChnGtDUUPcPRXMh2dVPV6o7ZPKFMQ+7+29J3IM/7hVM mlN6iZGIhO3EQtBwmYzqALw3Z0toqWleKAgNY2K8LnbsbcwBBg3kDV8/lyoWeHdS6N BFyh7y3fhoN4F94xSDi1d+dTo42a7XADLHF6nfoU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726753AbgJLIba (ORCPT ); Mon, 12 Oct 2020 04:31:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:56330 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726335AbgJLIba (ORCPT ); Mon, 12 Oct 2020 04:31:30 -0400 Received: from willie-the-truck (unknown [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 E228120714; Mon, 12 Oct 2020 08:31:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602491487; bh=S0GqfGRh8/Tl7HdVRLMI52r7qak2HNoCB3IVK6Zs4T4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FAGXtskDnU07QyUMOPdISrDHNwNMMZNEFc9kmIocOb5BS1ggUldHn150u5QE6XaTM TVeCby8WdrzZLI+/xIob9CoWuJsvJlykjpSdQ3zHOkkoakk83y4AGlrSMjgHyLWypR gQcCEbKimhtCql8PcZKHCdCEuxPXmulvNhE+OJes= Date: Mon, 12 Oct 2020 09:31:16 +0100 From: Will Deacon To: Sami Tolvanen Cc: Masahiro Yamada , Steven Rostedt , Peter Zijlstra , Greg Kroah-Hartman , "Paul E. McKenney" , Kees Cook , Nick Desaulniers , clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v5 25/29] arm64: allow LTO_CLANG and THINLTO to be selected Message-ID: <20201012083116.GA785@willie-the-truck> References: <20201009161338.657380-1-samitolvanen@google.com> <20201009161338.657380-26-samitolvanen@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201009161338.657380-26-samitolvanen@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Oct 09, 2020 at 09:13:34AM -0700, Sami Tolvanen wrote: > Allow CONFIG_LTO_CLANG and CONFIG_THINLTO to be enabled. > > Signed-off-by: Sami Tolvanen > Reviewed-by: Kees Cook > --- > arch/arm64/Kconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index ad522b021f35..7016d193864f 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -72,6 +72,8 @@ config ARM64 > select ARCH_USE_SYM_ANNOTATIONS > select ARCH_SUPPORTS_MEMORY_FAILURE > select ARCH_SUPPORTS_SHADOW_CALL_STACK if CC_HAVE_SHADOW_CALL_STACK > + select ARCH_SUPPORTS_LTO_CLANG > + select ARCH_SUPPORTS_THINLTO Please don't enable this for arm64 until we have the dependency stuff sorted out. I posted patches [1] for this before, but I think they should be part of this series as they don't make sense on their own. Will [1] https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=rwonce/read-barrier-depends 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=-16.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_PATCH,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 86194C433DF for ; Mon, 12 Oct 2020 08:33:03 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 115D020714 for ; Mon, 12 Oct 2020 08:33:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="M2w2+H0/"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="FAGXtskD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 115D020714 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+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=merlin.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=/6t1+wQJZvbbI+85zruIupp01xX4oj97h626YY6/0go=; b=M2w2+H0/BnUDYh1URPeTCSiwg DI4sEbZTj8Pw7FE2za2eEsWJKh7RP3SwCklyybBHKVwK0ho3VrjNg4FHDCslg9vWDGw0Fozj+hdfn NWikRCD5OzPaZXcIiAMq0R6TqDxdP3OPna1/ojCAaYnERwkCqumAegNlyr4eIZ1DX3LBegCBhDmzr iPTTf+WAlXIYI5nVMJ1h9JbS6hwhdQMCWexLyyRmWuRT7rzw831OxCJOLxVW1P3nCKcICZj8wSyHt z3x2m8jhLMyyalhYCOOevYCFchP1KtwCRux1G50WPXiOxIR2MoqVEiLJ2KGTr7vanXTkG9G0vwD6n oD3P2EynQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kRtEy-0003lr-Og; Mon, 12 Oct 2020 08:31:32 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kRtEw-0003kj-5d for linux-arm-kernel@lists.infradead.org; Mon, 12 Oct 2020 08:31:31 +0000 Received: from willie-the-truck (unknown [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 E228120714; Mon, 12 Oct 2020 08:31:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1602491487; bh=S0GqfGRh8/Tl7HdVRLMI52r7qak2HNoCB3IVK6Zs4T4=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=FAGXtskDnU07QyUMOPdISrDHNwNMMZNEFc9kmIocOb5BS1ggUldHn150u5QE6XaTM TVeCby8WdrzZLI+/xIob9CoWuJsvJlykjpSdQ3zHOkkoakk83y4AGlrSMjgHyLWypR gQcCEbKimhtCql8PcZKHCdCEuxPXmulvNhE+OJes= Date: Mon, 12 Oct 2020 09:31:16 +0100 From: Will Deacon To: Sami Tolvanen Subject: Re: [PATCH v5 25/29] arm64: allow LTO_CLANG and THINLTO to be selected Message-ID: <20201012083116.GA785@willie-the-truck> References: <20201009161338.657380-1-samitolvanen@google.com> <20201009161338.657380-26-samitolvanen@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20201009161338.657380-26-samitolvanen@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-20201012_043130_284138_D1E6448F X-CRM114-Status: GOOD ( 18.71 ) 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: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook , "Paul E. McKenney" , kernel-hardening@lists.openwall.com, Peter Zijlstra , Greg Kroah-Hartman , Masahiro Yamada , linux-kbuild@vger.kernel.org, Nick Desaulniers , linux-kernel@vger.kernel.org, Steven Rostedt , clang-built-linux@googlegroups.com, linux-pci@vger.kernel.org, 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Oct 09, 2020 at 09:13:34AM -0700, Sami Tolvanen wrote: > Allow CONFIG_LTO_CLANG and CONFIG_THINLTO to be enabled. > > Signed-off-by: Sami Tolvanen > Reviewed-by: Kees Cook > --- > arch/arm64/Kconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index ad522b021f35..7016d193864f 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -72,6 +72,8 @@ config ARM64 > select ARCH_USE_SYM_ANNOTATIONS > select ARCH_SUPPORTS_MEMORY_FAILURE > select ARCH_SUPPORTS_SHADOW_CALL_STACK if CC_HAVE_SHADOW_CALL_STACK > + select ARCH_SUPPORTS_LTO_CLANG > + select ARCH_SUPPORTS_THINLTO Please don't enable this for arm64 until we have the dependency stuff sorted out. I posted patches [1] for this before, but I think they should be part of this series as they don't make sense on their own. Will [1] https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=rwonce/read-barrier-depends _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel