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=-0.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 DE094C433DF for ; Fri, 22 May 2020 20:50:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B97EA2073B for ; Fri, 22 May 2020 20:50:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="GuCPn0pH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731087AbgEVUuF (ORCPT ); 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.