Received: by 2002:a25:1104:0:0:0:0:0 with SMTP id 4csp581192ybr; Fri, 22 May 2020 13:51:47 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwyiiVgoox0RW1S+SejLgTk+6OjgnGDiSjgNas8TwR716k62AsrX84ePEq9NN5r7Hk0jvyE X-Received: by 2002:a17:907:392:: with SMTP id ss18mr10401438ejb.156.1590180707083; Fri, 22 May 2020 13:51:47 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1590180707; cv=none; d=google.com; s=arc-20160816; b=bvJ7IEXJuCQZRwaBV4zs8D1Frt0L/UqwlTzMPaSr9ZbK8eRL8ZzSCCwUE1hggYvb39 e9Eia5AsdwKzFSe++zHhD0U/7dfAyUyv5FeTj4gmZS9FocaG3LF3d628PWSWVCIr8orm 5yy8i8J4MVgYbqJcRwrjI8Rqekj2Mn219uQpbPaxUkyCwK8mSdhkdBZow3u63gT9y6sy Pqx7MH2KNuH7yXrfmBAac3xgpq8f5iY8Cmet++lMawhxS3s6/rK8+9+SydfRwtDF7Z/Z gFmkjUXn3q8oMBjrr7WWEfl2zTOozJ+tceWXRnPMfdWR4wT2qUjytZvtagJvBYMs9Q6D kS6Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:subject:cc:to:from:date:user-agent :message-id:dkim-signature; bh=ui6qN/VsDMa8d0TtbA4QUsOoNa9pIsvogYj/5A7/E2g=; b=pNg+7WJBzbxYgIERFbWfpmt/3XwWkJPMduzZNgpHfv7DpwMTCkfhIsDSrWTNbXDg7a QqpyIt1LPXYlc5CFo/zmOMToHAkTeRbGQJ2ogFSQq1JdMvjOLByWAp3vIpDKdhLIa3l3 t1hR/qprNMi7dSPnkQ2bpQhCQnpG5EoqD9U6gQNCC7DzBQpQiKcT4crxouLJpQ32uT61 MiD1CuSQ6WOxbSY0e6vKD9ZrC/xMiPYedL3KKj2k2LPlgIpJXXGCUCcrU/Q59VRRIOHl nEq62+KQy+3qJ1EAh1J+AP7Fk9M0jgMi23dglT5cvPU/bXtjmzb6Gp7LgIn99kREXEDP ZT4A== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=GuCPn0pH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id j22si4991309edt.526.2020.05.22.13.51.24; Fri, 22 May 2020 13:51:47 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@infradead.org header.s=bombadil.20170209 header.b=GuCPn0pH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731082AbgEVUuF (ORCPT + 99 others); Fri, 22 May 2020 16:50:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56698 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731000AbgEVUuD (ORCPT ); Fri, 22 May 2020 16:50:03 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D014C08C5C0 for ; Fri, 22 May 2020 13:50:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Subject:Cc:To:From:Date:Message-ID: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To:References; bh=ui6qN/VsDMa8d0TtbA4QUsOoNa9pIsvogYj/5A7/E2g=; b=GuCPn0pHBlEJQUfcp4HcrdK4lR NuLifwlw5sFMPUlRV6fpelexvZNbxNMvKJEsYdrENwErIYFnw3uN2E7bQahxqYDc06zN2jNZIskBD /H+OqUP6G1yNaTclnt9dXMn/p6WaD4YmIebsiGvgjL+zs6X5LKphCn48eHtU6arHUxGYtd3yZajEj lL2MXZBhF0hwe5DuN2FgYElCkwj7Xg8LjkawhDPQI9isSI78JAl5fbQCuXx3LRtwxohQqI3sgGmbO tMbE+LlZGiCYlSi0Ek+P1rr//J43+FTgqXCmG3RGOFcuPX/F7y6wOUuj91tHqIJRGLuAnHx7toX8W H93WOAIA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jcEcA-0000lQ-PQ; Fri, 22 May 2020 20:49:58 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D06B63060FD; Fri, 22 May 2020 22:49:56 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id AA81023D5338D; Fri, 22 May 2020 22:49:56 +0200 (CEST) Message-ID: <20200522204738.645043059@infradead.org> User-Agent: quilt/0.66 Date: Fri, 22 May 2020 22:47:38 +0200 From: Peter Zijlstra To: tglx@linutronix.de, luto@amacapital.net, peterz@infradead.org Cc: linux-kernel@vger.kernel.org, x86@kernel.org Subject: [RFC][PATCH 0/4] x86/entry: disallow #DB more Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hai, this kills #DB during NMI/#MC and with that allows removing all the nasty IST rewrite crud.