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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 BEBC8C433DF for ; Thu, 20 Aug 2020 16:35:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 95DF82054F for ; Thu, 20 Aug 2020 16:35:25 +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="Xs2/7IIQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729931AbgHTQfX (ORCPT ); Thu, 20 Aug 2020 12:35:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726772AbgHTQfW (ORCPT ); Thu, 20 Aug 2020 12:35:22 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0DF61C061385 for ; Thu, 20 Aug 2020 09:35:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=v6s2A+JSqWJPzSwI5rBekbsr39F4L/vyOyCnBGRLWAk=; b=Xs2/7IIQoOkB61oMa6gfqIYs/s kuI1fdOQ8sgMANLILrzlg1+Zawa3CJ0x6s1qI8qsQVxUvrX43uv+HvMIeT2aUXYL0x+f21nMQvicc NGVhfvh/dHLfqimMQvZQQbSTChWaDtketU64pscLBeVs8NDxIzEG6lAd3sl/5cFgX7ye7542P6GRu Sd0MXQ7qdnXULGkQ+XwUp+YdzBoOrns71kmTV4jCPFndH/o7u9XD/szuQn8oEfCGSYQvIYX/5EScu Y72VArJwjAPuYDhYR1Kgl0upBjzLMgwpgPUFZxbRYdirN+C63GiM3V6LmpkxDwdqFT41Jnmt9Zh6f +AA5V2Dw==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1k8nWj-00025S-8v; Thu, 20 Aug 2020 16:34:57 +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 117E3302526; Thu, 20 Aug 2020 18:34:54 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id E8BD32BE18A13; Thu, 20 Aug 2020 18:34:53 +0200 (CEST) Date: Thu, 20 Aug 2020 18:34:53 +0200 From: peterz@infradead.org To: Josh Poimboeuf Cc: Brian Gerst , the arch/x86 maintainers , Linux Kernel Mailing List , Kyle Huey , Alexandre Chartre , Robert O'Callahan , "Paul E. McKenney" , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Andy Lutomirski Subject: Re: [RFC][PATCH 4/7] x86/debug: Move historical SYSENTER junk into exc_debug_kernel() Message-ID: <20200820163453.GE1362448@hirez.programming.kicks-ass.net> References: <20200820103832.486877479@infradead.org> <20200820104905.294802764@infradead.org> <20200820150841.GB1362448@hirez.programming.kicks-ass.net> <20200820151659.b7q7hspe5zsf46eg@treble> <20200820152111.GC1362448@hirez.programming.kicks-ass.net> <20200820161729.cxzjsdqtgr6vktqx@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200820161729.cxzjsdqtgr6vktqx@treble> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 20, 2020 at 11:17:29AM -0500, Josh Poimboeuf wrote: > On Thu, Aug 20, 2020 at 05:21:11PM +0200, peterz@infradead.org wrote: > > qemu-gdb stub should eat the event before it lands in the guest > > Are we sure about that? I triggered the warning just now, stepping > through the debug handler. Not sure at all, that's what seemed reasonable, but since when did that stop virt ;-) Also, can you trigger that same with upstream? Because I suspect this ought to tickle the old code too.