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, INCLUDES_PATCH,MAILING_LIST_MULTI,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 A0EC1C432C2 for ; Thu, 26 Sep 2019 10:57:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 702C0207E0 for ; Thu, 26 Sep 2019 10:57:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726000AbfIZK55 (ORCPT ); Thu, 26 Sep 2019 06:57:57 -0400 Received: from foss.arm.com ([217.140.110.172]:45936 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725812AbfIZK55 (ORCPT ); Thu, 26 Sep 2019 06:57:57 -0400 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 D79FE1000; Thu, 26 Sep 2019 03:57:56 -0700 (PDT) Received: from [192.168.1.158] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 46CDC3F67D; Thu, 26 Sep 2019 03:57:55 -0700 (PDT) Subject: Re: [PATCH 2/4] arm64: vdso32: Detect binutils support for dmb ishld To: Catalin Marinas Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, ard.biesheuvel@linaro.org, ndesaulniers@google.com, will@kernel.org, tglx@linutronix.de References: <20190920142738.qlsjwguc6bpnez63@willie-the-truck> <20190926060353.54894-1-vincenzo.frascino@arm.com> <20190926060353.54894-3-vincenzo.frascino@arm.com> <20190926083039.GC26802@iMac.local> From: Vincenzo Frascino Message-ID: Date: Thu, 26 Sep 2019 11:59:44 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190926083039.GC26802@iMac.local> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 9/26/19 9:30 AM, Catalin Marinas wrote: > On Thu, Sep 26, 2019 at 07:03:51AM +0100, Vincenzo Frascino wrote: >> diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h >> index fb60a88b5ed4..3fd8fd6d8fc2 100644 >> --- a/arch/arm64/include/asm/vdso/compat_barrier.h >> +++ b/arch/arm64/include/asm/vdso/compat_barrier.h >> @@ -20,7 +20,7 @@ >> >> #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") >> >> -#if __LINUX_ARM_ARCH__ >= 8 >> +#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD) >> #define aarch32_smp_mb() dmb(ish) >> #define aarch32_smp_rmb() dmb(ishld) >> #define aarch32_smp_wmb() dmb(ishst) >> diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile >> index 1fba0776ed40..1a3299d901b1 100644 >> --- a/arch/arm64/kernel/vdso32/Makefile >> +++ b/arch/arm64/kernel/vdso32/Makefile >> @@ -55,6 +55,9 @@ endif >> VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector >> VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING >> >> +# Check for binutils support for dmb ishld >> +dmbinstr := $(call as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1) > > Is this check for the compat gas or the native one? Looking at > scripts/Kbuild.include, as-instr uses CC but you'd need a COMPATCC here > instead. > > I may have missed something but I don't think this fixes the issue > Will's issue since he reported the problem with an old compat binutils. > Good catch I thought that it was sufficient to put it in the correct makefile, but I missed that COMPATCC != CC. This selects the wrong binutils. Need to add something in Kbuild for that. -- Regards, Vincenzo 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=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 650ACC432C2 for ; Thu, 26 Sep 2019 10:58:04 +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 32527207E0 for ; Thu, 26 Sep 2019 10:58:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="IM08hPdc" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 32527207E0 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:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XfeyFwCu/QwSggAu8tavTHZbTJXY24B/DG+IcT84pXo=; b=IM08hPdcVfi14O JhUgFzah6pX+GwzZXXkkyNvbpgXcACVudW/j9Cy/ehQjDPFSgBpGbetnwKAqsHap6khtNxuYIsKPd 1Mpb8l1DMTht5dPRX+OBDWfZZGlmmkbuZu/fLEZ6lH8nO67Rl8WY0QJh0dCx/GPGNmHIhydEUQ/F+ 4Ct032kU66HTQ4UOSJuXWirtYbKbTrUnxpWzFXMZ1gsx/oFgcGa/SN3qz7c8owoWRTdmcZ1YzYPnA VR5h9qpTdmZzFjCUfgA1GJfTTIzskO0rMyB7LIKo4NDfNscnCwbNJgKq9NQVXSv7qSexhLquzul2G hsac2JzyQBtrpeyw6vNA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iDRTE-0005Pb-F6; Thu, 26 Sep 2019 10:58:00 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iDRTB-0005Oo-Fz for linux-arm-kernel@lists.infradead.org; Thu, 26 Sep 2019 10:57:58 +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 D79FE1000; Thu, 26 Sep 2019 03:57:56 -0700 (PDT) Received: from [192.168.1.158] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 46CDC3F67D; Thu, 26 Sep 2019 03:57:55 -0700 (PDT) Subject: Re: [PATCH 2/4] arm64: vdso32: Detect binutils support for dmb ishld To: Catalin Marinas References: <20190920142738.qlsjwguc6bpnez63@willie-the-truck> <20190926060353.54894-1-vincenzo.frascino@arm.com> <20190926060353.54894-3-vincenzo.frascino@arm.com> <20190926083039.GC26802@iMac.local> From: Vincenzo Frascino Message-ID: Date: Thu, 26 Sep 2019 11:59:44 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190926083039.GC26802@iMac.local> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190926_035757_575375_F666E106 X-CRM114-Status: GOOD ( 15.42 ) 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: ard.biesheuvel@linaro.org, ndesaulniers@google.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, will@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+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 9/26/19 9:30 AM, Catalin Marinas wrote: > On Thu, Sep 26, 2019 at 07:03:51AM +0100, Vincenzo Frascino wrote: >> diff --git a/arch/arm64/include/asm/vdso/compat_barrier.h b/arch/arm64/include/asm/vdso/compat_barrier.h >> index fb60a88b5ed4..3fd8fd6d8fc2 100644 >> --- a/arch/arm64/include/asm/vdso/compat_barrier.h >> +++ b/arch/arm64/include/asm/vdso/compat_barrier.h >> @@ -20,7 +20,7 @@ >> >> #define dmb(option) __asm__ __volatile__ ("dmb " #option : : : "memory") >> >> -#if __LINUX_ARM_ARCH__ >= 8 >> +#if __LINUX_ARM_ARCH__ >= 8 && defined(CONFIG_AS_DMB_ISHLD) >> #define aarch32_smp_mb() dmb(ish) >> #define aarch32_smp_rmb() dmb(ishld) >> #define aarch32_smp_wmb() dmb(ishst) >> diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile >> index 1fba0776ed40..1a3299d901b1 100644 >> --- a/arch/arm64/kernel/vdso32/Makefile >> +++ b/arch/arm64/kernel/vdso32/Makefile >> @@ -55,6 +55,9 @@ endif >> VDSO_CAFLAGS += -fPIC -fno-builtin -fno-stack-protector >> VDSO_CAFLAGS += -DDISABLE_BRANCH_PROFILING >> >> +# Check for binutils support for dmb ishld >> +dmbinstr := $(call as-instr,dmb ishld,-DCONFIG_AS_DMB_ISHLD=1) > > Is this check for the compat gas or the native one? Looking at > scripts/Kbuild.include, as-instr uses CC but you'd need a COMPATCC here > instead. > > I may have missed something but I don't think this fixes the issue > Will's issue since he reported the problem with an old compat binutils. > Good catch I thought that it was sufficient to put it in the correct makefile, but I missed that COMPATCC != CC. This selects the wrong binutils. Need to add something in Kbuild for that. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel