Received: by 2002:ac0:a5a6:0:0:0:0:0 with SMTP id m35-v6csp4947853imm; Tue, 18 Sep 2018 01:40:08 -0700 (PDT) X-Google-Smtp-Source: ANB0VdYEj5EcOzc5Hz7Y+S36bo3hAQu/vx8j8t2MIZQkoMgx4YsuXd7ke8rfUfbdjOtfufiC4i19 X-Received: by 2002:a63:c60:: with SMTP id 32-v6mr26824307pgm.155.1537260007315; Tue, 18 Sep 2018 01:40:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1537260007; cv=none; d=google.com; s=arc-20160816; b=ilpB2H+l+Hs6osowcsQ1uYP4gxXcaGQEJJdGqCYadN64Ywv6JcXZp0v+l+nLyMZPto qnwfrsosO4SJFQD8xi3o1N9akyLv3mMvEGCc/CzbHpKw/v+sK5eZd+LLj7qxzSIzPE9+ bAjegJNyIdPGPFUPC84EgwbttJU/uhZB5FDksVVbufjwYTtWggTj+k1qpwXcya9QPNLd VNCMvUj/O5qiPreh+/BDTkqpl1Zxtaz/iovxYOyj3y6Mf18Mb7PjH2b0qzxVKxg5hdfT 80R2tuW7WVdS/l6+rF4M68EKo3mV1MRBGDQ8k2rPGw07TFvy2ITu5uBixGSdTTx4JpGP JUXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=biDQVeMGiAxiB2vllOYEiJb5LKmLdn7dcnrV12MeEIY=; b=ATILYwdYTYI7lSPiarq2dUNfIzjviOZQEPDAQMz/tLtvk1U5ifEYzfPYeER5a4QjKJ i2MZLnLF3EbzIZR6oo6giXg6SY6Ax2QDl6/oUMUSV/Kn6ym9INcxY4P5Oan6vM3jutam HeyjxJk4g1ISLx2cOjNBbuxn48YJihi4PB5VkRzDdyuT4NoA3WhaGHdnyE3jj53dUf03 8ioUPUFCZud8hk7o4eK9oN41jS3SJUNSpcS3xJ6ihEDOWwPIAeP69TJzLKLBn4fZFvJG GE9Zxcf9QL3oXjfHQUmckAl+k/jDj8LHL+9LwFIbXlHrfeB61nc8VDwGPgqib9TxsIsL tYUg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id k1-v6si17500940pld.424.2018.09.18.01.39.51; Tue, 18 Sep 2018 01:40:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729534AbeIROJV (ORCPT + 99 others); Tue, 18 Sep 2018 10:09:21 -0400 Received: from foss.arm.com ([217.140.101.70]:41122 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729148AbeIROJV (ORCPT ); Tue, 18 Sep 2018 10:09:21 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F1022ED1; Tue, 18 Sep 2018 01:37:46 -0700 (PDT) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C22053F5C0; Tue, 18 Sep 2018 01:37:46 -0700 (PDT) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 9482F1AE321F; Tue, 18 Sep 2018 09:38:05 +0100 (BST) Date: Tue, 18 Sep 2018 09:38:05 +0100 From: Will Deacon To: Robert Richter Cc: Mian Yousaf Kaukab , marc.zyngier@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, cwu@amperecomputing.com Subject: Re: [PATCH RESEND 3/6] arm64: add sysfs vulnerability show for spectre v1 Message-ID: <20180918083805.GB14404@arm.com> References: <20180827143310.641-1-ykaukab@suse.de> <20180827143310.641-4-ykaukab@suse.de> <20180917172206.GA3795@rric.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180917172206.GA3795@rric.localdomain> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 17, 2018 at 07:22:07PM +0200, Robert Richter wrote: > On 27.08.18 16:33:07, Mian Yousaf Kaukab wrote: > > Hard-coded since patches are merged and there are no configuration > > options. > > Could you add a list of upstream patches to the description that are > required to solve this? This would be a strict definition for the > mitigation being enabled and makes it easier to check if backports are > affected or not. A build-time check would be ideal (e.g. checking for > certain macros). Hmm, I don't grok what you're proposing here. Why do we need a build-time check (and to check what?) Confused, Will