Received: by 10.223.185.116 with SMTP id b49csp3269427wrg; Mon, 12 Feb 2018 23:48:39 -0800 (PST) X-Google-Smtp-Source: AH8x226VqJ5WB1RFLErvAx//PT0ymX9PBtxKqOU02A9qdUZO1rheVSw7UfF6Wb0LrbqniZEuZnxr X-Received: by 10.98.63.142 with SMTP id z14mr354598pfj.95.1518508119338; Mon, 12 Feb 2018 23:48:39 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1518508119; cv=none; d=google.com; s=arc-20160816; b=nKm7vwpklG30Z7eoBA028rLZGQnMDHoP5lOZez73J5XzizvVnX+5FQWElVVLdpybrH aWWv+EaVAvV0uaGcyhZTOxYSbtLhFfrMVpRlMAxGaHatFn6Y3N58dw1ssAuVwVyfO7kd gQCqiqjJ9bgkH/yuWMdGWpstiBLYqf7i3QVzPh0iPpbDg6aSnDSQ6yd9wuNpcdb5ZyWj +hTx5GHAA2+l5j7SPavMczyfIRmXW17B4P5S7TRg+Wy4/pVx+TvnT8kLpMUtToG51WhK JzfUcdlcvdmED3HIH8OAukZHsavql398eVQlziYWyo+ZBxgunBmcwiyqk4wMvRoSv4Z8 CALA== 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:dkim-signature:arc-authentication-results; bh=NAEBTnM4RDdZIBFeXAQX5A2M0dwAOzFOuBHR54u0QSQ=; b=KYNLiosYmwDuMxDVbAwNoqFKmoQtlV9xdsMiYAhXZFZ4l3WN7BILN8A9JHzV7rQbcY COgXvRYXFNSj96OYfwDdRIB0Y6y2FF1ebljtIiRiAGdA+bQs2cy370cw+2qCYxtpP9ZJ mvVt+SkcRy7+z6vlGj/a1NBFu/ECasFze6pL6IUZ/v4vAGsvTHsXfA01pHzvNiqJ0JQK 1JdFFKDzJgIyJYwK3vKlCo85Bp8ZWgpofUhoVdQW+iVq5jjWuPzI6Bjh4Lmhs6wSbyX2 JUOYYQanCxFzAg2tELm8q3FgbfbwFPwOORvej+wahtMmtlDYF35X5IOvy5/VVkGe0WVQ HzQA== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@gmail.com header.s=20161025 header.b=uqRgGMf1; 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 y4si1015272pfm.357.2018.02.12.23.48.23; Mon, 12 Feb 2018 23:48:39 -0800 (PST) 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; dkim=fail header.i=@gmail.com header.s=20161025 header.b=uqRgGMf1; 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 S933601AbeBMHro (ORCPT + 99 others); Tue, 13 Feb 2018 02:47:44 -0500 Received: from mail-wr0-f194.google.com ([209.85.128.194]:43106 "EHLO mail-wr0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933463AbeBMHrn (ORCPT ); Tue, 13 Feb 2018 02:47:43 -0500 Received: by mail-wr0-f194.google.com with SMTP id b52so17591717wrd.10; Mon, 12 Feb 2018 23:47:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=NAEBTnM4RDdZIBFeXAQX5A2M0dwAOzFOuBHR54u0QSQ=; b=uqRgGMf1e4GAu6x/DNXlojN/p5HGjCVMluSu/afRJzmZINH/L/D2ikYNdTPRV3Y4hm fWmCWWT33rs0WYjML4KfcCwzeVGYFirAZKsvOcXE2/gxfU8VlfEVVU+AoUxIg/Xc4zZD Sc35lk0gjDWqA5DdAcHdV3ja+FAkbu5sW4FQbz7qVN4QQVHOCj2DQ3ROXfc0Jg7TLRNf 0RQtpRmGnPxnHukTAyE4RFHaQJ/UiE48tJUXK5jE8oXLSOcxZV2LfpnArAKY0TmvxWcH YX5xkC+N/reixK9tlCxjF6lS+qoME8J8JAag2XV75JvGjA1cVQIfcsLkKN2hJJNr+agT d8Aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=NAEBTnM4RDdZIBFeXAQX5A2M0dwAOzFOuBHR54u0QSQ=; b=ZxfURdcrmzXXKEIvnhCy1bIjAZom+kTGT0EHD7gWRQc3TPl3WOi3x9oQRe63wRfUi7 5/fuyPpLPWOA8yZytj89yl2eYSDCLhShtDYm0u/ySZk0y45GH1pL3meDEnCUzHxQHK2w Ly4LiIkLNEp4Xae1AL0ksKv9sb9+ZqQYyMdslfdYiRVxe7zzp/JQPuQeDi2G/b6eofEh CAjCLZgQ1G+ESlLzhBqUjJ8ye6DQpUFG2oPvJGSdkPjumKWnMy0TS97DesuknMR27aF6 CbVH48J2mSKfd2Zzoj6BM3dupdLTx9LCODJdCyF65Z8hQZVWeO0Ar3v3gEABpeOgQn+N 5Sdg== X-Gm-Message-State: APf1xPBe088QH1TPkU52wk+ykKxlkeAl6FjhEJBE0r9g9tVNz6RIy9Dq fel1Bw4XKN/nf8VJy51NJOA= X-Received: by 10.223.201.11 with SMTP id m11mr369192wrh.146.1518508061600; Mon, 12 Feb 2018 23:47:41 -0800 (PST) Received: from gmail.com (2E8B0CD5.catv.pool.telekom.hu. [46.139.12.213]) by smtp.gmail.com with ESMTPSA id 6sm10112834wrd.57.2018.02.12.23.47.39 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 12 Feb 2018 23:47:40 -0800 (PST) Date: Tue, 13 Feb 2018 08:47:38 +0100 From: Ingo Molnar To: David Woodhouse Cc: tglx@linutronix.de, x86@kernel.org, kvm@vger.kernel.org, torvalds@linux-foundation.org, pbonzini@redhat.com, linux-kernel@vger.kernel.org, arjan.van.de.ven@intel.com, dave.hansen@intel.com Subject: Re: [PATCH 2/2] x86/speculation: Support "Enhanced IBRS" on future CPUs Message-ID: <20180213074738.nrohmtchyr6fddhm@gmail.com> References: <1518449255-2182-1-git-send-email-dwmw@amazon.co.uk> <1518449255-2182-2-git-send-email-dwmw@amazon.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1518449255-2182-2-git-send-email-dwmw@amazon.co.uk> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * David Woodhouse wrote: > +extern enum spectre_v2_mitigation spectre_v2_enabled; This needs to be exported if the KVM module wants to use it. > +static inline bool spectre_v2_ibrs_all(void) > +{ > + return spectre_v2_enabled == SPECTRE_V2_IBRS_ALL; > +} > + if (vmx->spec_ctrl && !spectre_v2_ibrs_all()) > + if (!spectre_v2_ibrs_all) { erm, that's a function, not a flag ... Thanks, Ingo