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=-0.8 required=3.0 tests=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 D84C4C433E1 for ; Fri, 22 May 2020 13:02:21 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B33B12070A for ; Fri, 22 May 2020 13:02:21 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B33B12070A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:57248 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jc7Jc-00052c-Ul for qemu-devel@archiver.kernel.org; Fri, 22 May 2020 09:02:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46244) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jc7II-0003ca-2B for qemu-devel@nongnu.org; Fri, 22 May 2020 09:00:58 -0400 Received: from indium.canonical.com ([91.189.90.7]:36156) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jc7IG-0001UC-Px for qemu-devel@nongnu.org; Fri, 22 May 2020 09:00:57 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1jc7IE-00022Q-Os for ; Fri, 22 May 2020 13:00:54 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id AEF892E807D for ; Fri, 22 May 2020 13:00:54 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 22 May 2020 12:51:32 -0000 From: Paul Goyette <1693649@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Incomplete; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: paul-whooppee th-huth X-Launchpad-Bug-Reporter: Paul Goyette (paul-whooppee) X-Launchpad-Bug-Modifier: Paul Goyette (paul-whooppee) References: <149575946555.18286.18117412791023512529.malonedeb@chaenomeles.canonical.com> <159012475963.7477.6476241369082913120.malone@gac.canonical.com> Message-Id: Subject: Re: [Bug 1693649] Re: x86 pause misbehaves with -cpu haswell X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="1f7bc749b40714a4cc10f5e4d787118a78037035"; Instance="production-secrets-lazr.conf" X-Launchpad-Hash: 04ceeb837c8ff76461ad44dc96eda2e0274ab198 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/22 09:00:55 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -65 X-Spam_score: -6.6 X-Spam_bar: ------ X-Spam_report: (-6.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1693649 <1693649@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Seems ok now. On Fri, 22 May 2020, Thomas Huth wrote: > Can you still reproduce this issue with the latest version of QEMU > (currently 5.0)? > > ** Changed in: qemu > Status: New =3D> Incomplete > > -- = > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1693649 > > Title: > x86 pause misbehaves with -cpu haswell > > Status in QEMU: > Incomplete > > Bug description: > Using qemu-2.9.0 > > When booting NetBSD using '-cpu haswell -smp 4', the system fails to > initialize the additional CPUs. It appears as though the "application > processor" enters routine x86_pause() but never returns. > > x86_pause() is simply two assembler instructions: 'pause; ret;' > > Replacing the routine with 'nop; nop; ret;' allows the system to > proceed, of course without the benefit of the pause instruction on > spin-loops! > > Additionally, booting with '-cpu phenom -smp 4' also works, although > the system does seem confused about the type of CPU being used. > > To manage notifications about this bug go to: > https://bugs.launchpad.net/qemu/+bug/1693649/+subscriptions > > !DSPAM:5ec7625658281532840571! > > +--------------------+--------------------------+-----------------------+ | Paul Goyette | PGP Key fingerprint: | E-mail addresses: | | (Retired) | FA29 0E3B 35AF E8AE 6651 | paul@whooppee.com | | Software Developer | 0786 F758 55DE 53BA 7731 | pgoyette@netbsd.org | +--------------------+--------------------------+-----------------------+ -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1693649 Title: x86 pause misbehaves with -cpu haswell Status in QEMU: Incomplete Bug description: Using qemu-2.9.0 When booting NetBSD using '-cpu haswell -smp 4', the system fails to initialize the additional CPUs. It appears as though the "application processor" enters routine x86_pause() but never returns. x86_pause() is simply two assembler instructions: 'pause; ret;' Replacing the routine with 'nop; nop; ret;' allows the system to proceed, of course without the benefit of the pause instruction on spin-loops! Additionally, booting with '-cpu phenom -smp 4' also works, although the system does seem confused about the type of CPU being used. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1693649/+subscriptions