From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37400) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1camf5-0003Xv-9K for qemu-devel@nongnu.org; Mon, 06 Feb 2017 12:01:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1camf3-0001W9-CL for qemu-devel@nongnu.org; Mon, 06 Feb 2017 12:01:07 -0500 Received: from indium.canonical.com ([91.189.90.7]:37226) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1camf3-0001Vs-3Q for qemu-devel@nongnu.org; Mon, 06 Feb 2017 12:01:05 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.76 #1 (Debian)) id 1camf1-0003R1-8y for ; Mon, 06 Feb 2017 17:01:03 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id E8B242E80D7 for ; Mon, 6 Feb 2017 17:01:02 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 06 Feb 2017 16:54:59 -0000 From: "Matwey V. Kornilov" Reply-To: Bug 1661386 <1661386@bugs.launchpad.net> Sender: bounces@canonical.com References: <20170202204510.26617.69309.malonedeb@wampee.canonical.com> <20170206100245.27566.61856.malone@chaenomeles.canonical.com> Message-Id: Errors-To: bounces@canonical.com Subject: Re: [Qemu-devel] [Bug 1661386] Re: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org 2017-02-06 13:02 GMT+03:00 Dr. David Alan Gilbert : > Hi Matwey, > 1) Can you provide me with the output of the 'dmesg' command straight a= fter boot on your host. I've attached dmesg. I had to do this from beginning. > 2) If you look in target/i386/kvm.c in kvm_arch_init_vcpu around line 871 is some code like: kvm_arch_init_vcpu ver=3D7300402 Indeed, the guest kernel started. > > if ((ver & 0xff) > 0) { > has_msr_architectural_pmu =3D true; > num_architectural_pmu_counters =3D (ver & 0xff00) >> 8; > > /* Shouldn't be more than 32, since that's the number of bits > * available in EBX to tell us _which_ counters are available. > * Play it safe. > */ > if (num_architectural_pmu_counters > MAX_GP_COUNTERS) { > num_architectural_pmu_counters =3D MAX_GP_COUNTERS; > } > > change the start of that to : > fprintf(stderr, "kvm_arch_init_vcpu ver=3D%x\n", ver); > if (0) { > > I think that might make it work, but please tell us what it prints > as ver=3D > > Dave > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1661386 > > Title: > Assertion `ret =3D=3D cpu->kvm_msr_buf->nmsrs' failed > > Status in QEMU: > New > > Bug description: > Hello, > > > I see the following when try to run qemu from master as the following: > > # ./x86_64-softmmu/qemu-system-x86_64 --version > QEMU emulator version 2.8.50 (v2.8.0-1006-g4e9f524) > Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers > # ./x86_64-softmmu/qemu-system-x86_64 -machine accel=3Dkvm -nodefaults > -no-reboot -nographic -cpu host -vga none -kernel .build.kernel.kvm > -initrd .build.initrd.kvm -append 'panic=3D1 no-kvmclock console=3DttyS0 > loglevel=3D7' -m 1024 -serial stdio > qemu-system-x86_64: /home/matwey/lab/qemu/target/i386/kvm.c:1849: > kvm_put_msrs: Assertion `ret =3D=3D cpu->kvm_msr_buf->nmsrs' failed. > > First broken commit has been bisected: > > commit 48e1a45c3166d659f781171a47dabf4a187ed7a5 > Author: Paolo Bonzini > Date: Wed Mar 30 22:55:29 2016 +0200 > > target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs > > This would have caught the bug in the previous patch. > > Signed-off-by: Paolo Bonzini > > My cpuinfo is the following: > > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 44 > model name : Intel(R) Xeon(R) CPU X5675 @ 3.07GHz > stepping : 2 > microcode : 0x14 > cpu MHz : 3066.775 > cache size : 12288 KB > physical id : 0 > siblings : 2 > core id : 0 > cpu cores : 2 > apicid : 0 > initial apicid : 0 > fpu : yes > fpu_exception : yes > cpuid level : 11 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge = mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm= constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc= aperfmperf pni pclmulqdq vmx ssse3 cx16 sse4_1 sse4_2 popcnt aes hyperviso= r lahf_lm ida arat epb dtherm tpr_shadow vnmi ept vpid > bugs : > bogomips : 6133.55 > clflush size : 64 > cache_alignment : 64 > address sizes : 40 bits physical, 48 bits virtual > power management: > > To manage notifications about this bug go to: > https://bugs.launchpad.net/qemu/+bug/1661386/+subscriptions -- = With best regards, Matwey V. Kornilov http://blog.matwey.name xmpp://0x2207@jabber.ru -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1661386 Title: Assertion `ret =3D=3D cpu->kvm_msr_buf->nmsrs' failed Status in QEMU: New Bug description: Hello, = I see the following when try to run qemu from master as the following: # ./x86_64-softmmu/qemu-system-x86_64 --version QEMU emulator version 2.8.50 (v2.8.0-1006-g4e9f524) Copyright (c) 2003-2016 Fabrice Bellard and the QEMU Project developers # ./x86_64-softmmu/qemu-system-x86_64 -machine accel=3Dkvm -nodefaults -no-reboot -nographic -cpu host -vga none -kernel .build.kernel.kvm -initrd .build.initrd.kvm -append 'panic=3D1 no-kvmclock console=3DttyS0 loglevel=3D7' -m 1024 -serial stdio qemu-system-x86_64: /home/matwey/lab/qemu/target/i386/kvm.c:1849: kvm_put_msrs: Assertion `ret =3D=3D cpu->kvm_msr_buf->nmsrs' failed. First broken commit has been bisected: commit 48e1a45c3166d659f781171a47dabf4a187ed7a5 Author: Paolo Bonzini Date: Wed Mar 30 22:55:29 2016 +0200 target-i386: assert that KVM_GET/SET_MSRS can set all requested MSRs = This would have caught the bug in the previous patch. = Signed-off-by: Paolo Bonzini My cpuinfo is the following: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 44 model name : Intel(R) Xeon(R) CPU X5675 @ 3.07GHz stepping : 2 microcode : 0x14 cpu MHz : 3066.775 cache size : 12288 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mc= a cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm c= onstant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc a= perfmperf pni pclmulqdq vmx ssse3 cx16 sse4_1 sse4_2 popcnt aes hypervisor = lahf_lm ida arat epb dtherm tpr_shadow vnmi ept vpid bugs : bogomips : 6133.55 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1661386/+subscriptions