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=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT 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 7880CC4360F for ; Fri, 5 Apr 2019 16:04:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A64D204EC for ; Fri, 5 Apr 2019 16:04:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731326AbfDEQEB (ORCPT ); Fri, 5 Apr 2019 12:04:01 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51740 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726135AbfDEQEA (ORCPT ); Fri, 5 Apr 2019 12:04:00 -0400 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 38D03307E061; Fri, 5 Apr 2019 16:04:00 +0000 (UTC) Received: from treble (ovpn-123-87.rdu2.redhat.com [10.10.123.87]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 24E665D9E1; Fri, 5 Apr 2019 16:03:54 +0000 (UTC) Date: Fri, 5 Apr 2019 11:03:51 -0500 From: Josh Poimboeuf To: Will Deacon Cc: linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Jiri Kosina , Waiman Long , Andrea Arcangeli , Jon Masters , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Martin Schwidefsky , Heiko Carstens , linux-s390@vger.kernel.org, Catalin Marinas , linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, Greg Kroah-Hartman , Tyler Hicks , Linus Torvalds Subject: Re: [PATCH RFC 5/5] arm64/speculation: Add support for 'cpu_spec_mitigations=' cmdline options Message-ID: <20190405160351.5l4wbmool5m4rkua@treble> References: <5f70df57b19bbccc4a0d5d76134b4681c9a50b0b.1554396090.git.jpoimboe@redhat.com> <20190405144414.GB7662@fuggles.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190405144414.GB7662@fuggles.cambridge.arm.com> User-Agent: NeoMutt/20180716 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Fri, 05 Apr 2019 16:04:00 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 05, 2019 at 03:44:14PM +0100, Will Deacon wrote: > Hi Josh, > > On Thu, Apr 04, 2019 at 11:44:15AM -0500, Josh Poimboeuf wrote: > > Configure arm64 runtime CPU speculation bug mitigations in accordance > > with the 'cpu_spec_mitigations=' cmdline options. This affects > > Meltdown and Speculative Store Bypass. > > > > The default behavior is unchanged. > > > > Signed-off-by: Josh Poimboeuf > > --- > > Documentation/admin-guide/kernel-parameters.txt | 2 ++ > > arch/arm64/kernel/cpu_errata.c | 4 ++++ > > arch/arm64/kernel/cpufeature.c | 6 ++++++ > > 3 files changed, 12 insertions(+) > > Just wanted to make you aware that this is probably going to conflict badly > with some patches we have pending to hook up the sysfs entries: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2019-March/640326.html > > That patch series isn't quite there yet, so I'm expecting a v7, but I think > it will change the shape of this patch quite a lot. Thanks for the heads up Will. I will drop the arm64 patch for now then. -- Josh From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josh Poimboeuf Subject: Re: [PATCH RFC 5/5] arm64/speculation: Add support for 'cpu_spec_mitigations=' cmdline options Date: Fri, 5 Apr 2019 11:03:51 -0500 Message-ID: <20190405160351.5l4wbmool5m4rkua@treble> References: <5f70df57b19bbccc4a0d5d76134b4681c9a50b0b.1554396090.git.jpoimboe@redhat.com> <20190405144414.GB7662@fuggles.cambridge.arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <20190405144414.GB7662@fuggles.cambridge.arm.com> Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: Will Deacon Cc: linux-kernel@vger.kernel.org, x86@kernel.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H . Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Jiri Kosina , Waiman Long , Andrea Arcangeli , Jon Masters , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Martin Schwidefsky , Heiko Carstens , linux-s390@vger.kernel.org, Catalin Marinas , linux-arm-kernel@lists.infradead.orglinux List-ID: On Fri, Apr 05, 2019 at 03:44:14PM +0100, Will Deacon wrote: > Hi Josh, > > On Thu, Apr 04, 2019 at 11:44:15AM -0500, Josh Poimboeuf wrote: > > Configure arm64 runtime CPU speculation bug mitigations in accordance > > with the 'cpu_spec_mitigations=' cmdline options. This affects > > Meltdown and Speculative Store Bypass. > > > > The default behavior is unchanged. > > > > Signed-off-by: Josh Poimboeuf > > --- > > Documentation/admin-guide/kernel-parameters.txt | 2 ++ > > arch/arm64/kernel/cpu_errata.c | 4 ++++ > > arch/arm64/kernel/cpufeature.c | 6 ++++++ > > 3 files changed, 12 insertions(+) > > Just wanted to make you aware that this is probably going to conflict badly > with some patches we have pending to hook up the sysfs entries: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2019-March/640326.html > > That patch series isn't quite there yet, so I'm expecting a v7, but I think > it will change the shape of this patch quite a lot. Thanks for the heads up Will. I will drop the arm64 patch for now then. -- Josh 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=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT 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 934C5C4360F for ; Fri, 5 Apr 2019 16:05:41 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 0BFD7204EC for ; Fri, 5 Apr 2019 16:05:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0BFD7204EC Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44bPmf1M3mzDqSq for ; Sat, 6 Apr 2019 03:05:38 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=redhat.com (client-ip=209.132.183.28; helo=mx1.redhat.com; envelope-from=jpoimboe@redhat.com; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=redhat.com Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 44bPkp1SwxzDqSV for ; Sat, 6 Apr 2019 03:04:02 +1100 (AEDT) Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 38D03307E061; Fri, 5 Apr 2019 16:04:00 +0000 (UTC) Received: from treble (ovpn-123-87.rdu2.redhat.com [10.10.123.87]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 24E665D9E1; Fri, 5 Apr 2019 16:03:54 +0000 (UTC) Date: Fri, 5 Apr 2019 11:03:51 -0500 From: Josh Poimboeuf To: Will Deacon Subject: Re: [PATCH RFC 5/5] arm64/speculation: Add support for 'cpu_spec_mitigations=' cmdline options Message-ID: <20190405160351.5l4wbmool5m4rkua@treble> References: <5f70df57b19bbccc4a0d5d76134b4681c9a50b0b.1554396090.git.jpoimboe@redhat.com> <20190405144414.GB7662@fuggles.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190405144414.GB7662@fuggles.cambridge.arm.com> User-Agent: NeoMutt/20180716 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Fri, 05 Apr 2019 16:04:00 +0000 (UTC) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , Heiko Carstens , Paul Mackerras , "H . Peter Anvin" , Ingo Molnar , Andrea Arcangeli , linux-s390@vger.kernel.org, x86@kernel.org, Linus Torvalds , Catalin Marinas , Waiman Long , linux-arch@vger.kernel.org, Jon Masters , Jiri Kosina , Borislav Petkov , Andy Lutomirski , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Tyler Hicks , Martin Schwidefsky , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Apr 05, 2019 at 03:44:14PM +0100, Will Deacon wrote: > Hi Josh, > > On Thu, Apr 04, 2019 at 11:44:15AM -0500, Josh Poimboeuf wrote: > > Configure arm64 runtime CPU speculation bug mitigations in accordance > > with the 'cpu_spec_mitigations=' cmdline options. This affects > > Meltdown and Speculative Store Bypass. > > > > The default behavior is unchanged. > > > > Signed-off-by: Josh Poimboeuf > > --- > > Documentation/admin-guide/kernel-parameters.txt | 2 ++ > > arch/arm64/kernel/cpu_errata.c | 4 ++++ > > arch/arm64/kernel/cpufeature.c | 6 ++++++ > > 3 files changed, 12 insertions(+) > > Just wanted to make you aware that this is probably going to conflict badly > with some patches we have pending to hook up the sysfs entries: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2019-March/640326.html > > That patch series isn't quite there yet, so I'm expecting a v7, but I think > it will change the shape of this patch quite a lot. Thanks for the heads up Will. I will drop the arm64 patch for now then. -- Josh 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=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_NEOMUTT 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 212FDC4360F for ; Fri, 5 Apr 2019 16:04:09 +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 E1C212175B for ; Fri, 5 Apr 2019 16:04:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="QcmwlEzt" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E1C212175B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.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=7xK+MruWNE190sRKPGCnnNh2oGOnuqXpthY8JFzj+W0=; b=QcmwlEzt8vHW65 VFdiWFxuYUe1Txw0tljP6qljlI0C4E8fAgIIuuDNw97xgDG1+jvGmluZZQQChSZmgDZ/17sWlCqgh J/9DN6N/i5b5lrKUQeOi3AJqoBmEoLWDmZxHicdTsyhK4eRGZp3Hb2zXu/HYk4yEvEASdCR/Y8Z0E aiJe4N8WXmEbA5j5T6VZgmE/3WTIuZf+sTQNOEYEd7dbKRltsnrCmmQZVoCtT3X25i6B5VKPgXZsP whYkcBq9PUWm/xG5VEDSBw4EvsZQ4lfYSiZlVu3vWNJLzjpbHCzKggQoAoozlQrZXZQBNEuX8T0Xw 24oQcvFKOMyM2YC0DXZQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hCRK0-0005GS-Kc; Fri, 05 Apr 2019 16:04:04 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hCRJw-0005Fr-UV for linux-arm-kernel@lists.infradead.org; Fri, 05 Apr 2019 16:04:02 +0000 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 38D03307E061; Fri, 5 Apr 2019 16:04:00 +0000 (UTC) Received: from treble (ovpn-123-87.rdu2.redhat.com [10.10.123.87]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 24E665D9E1; Fri, 5 Apr 2019 16:03:54 +0000 (UTC) Date: Fri, 5 Apr 2019 11:03:51 -0500 From: Josh Poimboeuf To: Will Deacon Subject: Re: [PATCH RFC 5/5] arm64/speculation: Add support for 'cpu_spec_mitigations=' cmdline options Message-ID: <20190405160351.5l4wbmool5m4rkua@treble> References: <5f70df57b19bbccc4a0d5d76134b4681c9a50b0b.1554396090.git.jpoimboe@redhat.com> <20190405144414.GB7662@fuggles.cambridge.arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190405144414.GB7662@fuggles.cambridge.arm.com> User-Agent: NeoMutt/20180716 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.42]); Fri, 05 Apr 2019 16:04:00 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190405_090401_197625_7C852920 X-CRM114-Status: GOOD ( 19.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Zijlstra , Benjamin Herrenschmidt , Heiko Carstens , Paul Mackerras , "H . Peter Anvin" , Ingo Molnar , Andrea Arcangeli , linux-s390@vger.kernel.org, Michael Ellerman , x86@kernel.org, Linus Torvalds , Catalin Marinas , Waiman Long , linux-arch@vger.kernel.org, Jon Masters , Jiri Kosina , Borislav Petkov , Andy Lutomirski , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Tyler Hicks , Martin Schwidefsky , linuxppc-dev@lists.ozlabs.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 Fri, Apr 05, 2019 at 03:44:14PM +0100, Will Deacon wrote: > Hi Josh, > > On Thu, Apr 04, 2019 at 11:44:15AM -0500, Josh Poimboeuf wrote: > > Configure arm64 runtime CPU speculation bug mitigations in accordance > > with the 'cpu_spec_mitigations=' cmdline options. This affects > > Meltdown and Speculative Store Bypass. > > > > The default behavior is unchanged. > > > > Signed-off-by: Josh Poimboeuf > > --- > > Documentation/admin-guide/kernel-parameters.txt | 2 ++ > > arch/arm64/kernel/cpu_errata.c | 4 ++++ > > arch/arm64/kernel/cpufeature.c | 6 ++++++ > > 3 files changed, 12 insertions(+) > > Just wanted to make you aware that this is probably going to conflict badly > with some patches we have pending to hook up the sysfs entries: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2019-March/640326.html > > That patch series isn't quite there yet, so I'm expecting a v7, but I think > it will change the shape of this patch quite a lot. Thanks for the heads up Will. I will drop the arm64 patch for now then. -- Josh _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel