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=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 7108EC433DF for ; Fri, 22 May 2020 13:26:42 +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 405F52065F for ; Fri, 22 May 2020 13:26:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 405F52065F 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]:47062 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jc7hB-0007SR-FW for qemu-devel@archiver.kernel.org; Fri, 22 May 2020 09:26:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48872) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jc7gT-0006UN-3f for qemu-devel@nongnu.org; Fri, 22 May 2020 09:25:57 -0400 Received: from indium.canonical.com ([91.189.90.7]:44328) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jc7gN-000683-JN for qemu-devel@nongnu.org; Fri, 22 May 2020 09:25:56 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1jc7gK-0006bM-Qw for ; Fri, 22 May 2020 13:25:48 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id BD3022E807E for ; Fri, 22 May 2020 13:25:48 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Fri, 22 May 2020 13:15:50 -0000 From: Paul Goyette <1693667@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: <149576851455.3442.6872660890935328507.malonedeb@gac.canonical.com> <159012464460.7805.8570634820762993435.malone@gac.canonical.com> Message-Id: Subject: Re: [Bug 1693667] Re: -cpu haswell / broadwell have no MONITOR in features1 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: e97917cf8fe990b6f3b52275222b45f3ebb84441 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 1693667 <1693667@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This bug seems not to be a problem, and may reflect an issue with NetBSD. Even though the decode of the features1 register does not include MONITOR/MWAIT, that capability is separately reported on a separate line, further down (apologies in advance for any confusing line-wrap): # cpuctl identify 0 cpu0: highest basic info 0000000d cpu0: highest hypervisor info 40000001 cpu0: highest extended info 80000008 cpu0: Running on hypervisor: QEMU(TCG) cpu0: "Intel Core Processor (Broadwell)" cpu0: Intel Core M-5xxx, 5th gen Core (Broadwell) (686-class), 3198.24 MHz cpu0: family 0x6 model 0x3d stepping 0x2 (id 0x306d2) cpu0: features 0x78bfbfd cpu0: features 0x78bfbfd cpu0: features1 0xced82203 cpu0: features1 0xced82203 cpu0: features2 0x28100800 cpu0: features3 0x21 cpu0: features5 0x180389 cpu0: xsave features 0x7 cpu0: xsave instructions 0x1 cpu0: xsave area size: current 832, maximum 832, xgetbv enabled cpu0: enabled xsave 0x7 cpu0: I-cache 32KB 64B/line 8-way, D-cache 32KB 64B/line 8-way cpu0: L2 cache 4MB 64B/line 16-way cpu0: L3 cache 16MB 64B/line 16-way cpu0: Initial APIC ID 0 cpu0: Cluster/Package ID 0 cpu0: Core ID 0 cpu0: SMT ID 0 cpu0: MONITOR/MWAIT extensions 0x3 cpu0: monitor-line size 0 cpu0: DSPM-eax 0x4 cpu0: SEF highest subleaf 00000000 cpu0: Power Management features: 0 cpu0: microcode version 0x0, platform ID 0 # On Fri, 22 May 2020, Thomas Huth wrote: > Can you still reproduce this issue with the latest version of QEMU? > Looking at > https://git.qemu.org/?p=3Dqemu.git;a=3Dcommitdiff;h=3D0723cc8a5558c94388 = for > example, it might have been fixed since QEMU v4.2... > > ** 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/1693667 > > Title: > -cpu haswell / broadwell have no MONITOR in features1 > > Status in QEMU: > Incomplete > > Bug description: > In qemu 2.9.0 if you run > > qemu-system-x86_64 -cpu Broadwell (or Haswell) > > then the CPU features1 flag include the SSE3 bit, but do NOT include > the MONITOR/MWAIT bit. This is so even when the host includes the > features. > > > Additionally, running qemu in this manner results in several error messa= ges: > > warning: TCG doesn't support requested feature: CPUID.01H:ECX.fma [bit 1= 2] > warning: TCG doesn't support requested feature: CPUID.01H:ECX.pcid [bit = 17] > warning: TCG doesn't support requested feature: CPUID.01H:ECX.x2apic [bi= t 21] > warning: TCG doesn't support requested feature: CPUID.01H:ECX.tsc-deadli= ne [bit 24] > warning: TCG doesn't support requested feature: CPUID.01H:ECX.avx [bit 2= 8] > warning: TCG doesn't support requested feature: CPUID.01H:ECX.f16c [bit = 29] > warning: TCG doesn't support requested feature: CPUID.01H:ECX.rdrand [bi= t 30] > warning: TCG doesn't support requested feature: CPUID.07H:EBX.hle [bit 4] > warning: TCG doesn't support requested feature: CPUID.07H:EBX.avx2 [bit = 5] > warning: TCG doesn't support requested feature: CPUID.07H:EBX.invpcid [b= it 10] > warning: TCG doesn't support requested feature: CPUID.07H:EBX.rtm [bit 1= 1] > warning: TCG doesn't support requested feature: CPUID.07H:EBX.rdseed [bi= t 18] > warning: TCG doesn't support requested feature: CPUID.80000001H:ECX.3dno= wprefetch > > > (Among possible other uses, the lack of the MONITOR feature bit causes N= etBSD to fall-back on a > check-and-pause loop while an application CPU is waiting to be told to p= roceed by the boot CPU.) > > To manage notifications about this bug go to: > https://bugs.launchpad.net/qemu/+bug/1693667/+subscriptions > > !DSPAM:5ec76256254551748016490! > > +--------------------+--------------------------+-----------------------+ | 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/1693667 Title: -cpu haswell / broadwell have no MONITOR in features1 Status in QEMU: Incomplete Bug description: In qemu 2.9.0 if you run qemu-system-x86_64 -cpu Broadwell (or Haswell) then the CPU features1 flag include the SSE3 bit, but do NOT include the MONITOR/MWAIT bit. This is so even when the host includes the features. = Additionally, running qemu in this manner results in several error messag= es: warning: TCG doesn't support requested feature: CPUID.01H:ECX.fma [bit 12] warning: TCG doesn't support requested feature: CPUID.01H:ECX.pcid [bit 1= 7] warning: TCG doesn't support requested feature: CPUID.01H:ECX.x2apic [bit= 21] warning: TCG doesn't support requested feature: CPUID.01H:ECX.tsc-deadlin= e [bit 24] warning: TCG doesn't support requested feature: CPUID.01H:ECX.avx [bit 28] warning: TCG doesn't support requested feature: CPUID.01H:ECX.f16c [bit 2= 9] warning: TCG doesn't support requested feature: CPUID.01H:ECX.rdrand [bit= 30] warning: TCG doesn't support requested feature: CPUID.07H:EBX.hle [bit 4] warning: TCG doesn't support requested feature: CPUID.07H:EBX.avx2 [bit 5] warning: TCG doesn't support requested feature: CPUID.07H:EBX.invpcid [bi= t 10] warning: TCG doesn't support requested feature: CPUID.07H:EBX.rtm [bit 11] warning: TCG doesn't support requested feature: CPUID.07H:EBX.rdseed [bit= 18] warning: TCG doesn't support requested feature: CPUID.80000001H:ECX.3dnow= prefetch = (Among possible other uses, the lack of the MONITOR feature bit causes Ne= tBSD to fall-back on a check-and-pause loop while an application CPU is waiting to be told to pr= oceed by the boot CPU.) To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1693667/+subscriptions