From: "Christian Ehrhardt " <1920784@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
Date: Wed, 24 Mar 2021 06:41:31 -0000 [thread overview]
Message-ID: <161656809120.851.12308410347120014741.malone@soybean.canonical.com> (raw)
In-Reply-To: 161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com
@Sadoon - yes, that is the same fix that Laurent pointed to a few hours
before.
@Frank - the kernel I had before was 5.11.0-11-generic (failing). I've
tested "5.11.0-13-generic #14~lp1920784" from your PPA and can confirm
that this fixes the issue.
Thanks Laurent for identifying the fix and thanks Frank for the kernel.
I'll mark bug tasks accordingly and @Frank you'll let me know if there is anything else you need to drive this to completion.
** Changed in: qemu
Status: New => Invalid
** Changed in: glibc (Ubuntu)
Status: New => Invalid
** Changed in: qemu (Ubuntu)
Status: Confirmed => Invalid
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https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
Invalid
Status in The Ubuntu-power-systems project:
Confirmed
Status in glibc package in Ubuntu:
Invalid
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
Invalid
Bug description:
(Suspected glibc issue!)
qemu-system-ppc64(le) fails when invoked with kvm acceleration with
error "illegal instruction"
> qemu-system-ppc64(le) -M pseries,accel=kvm
Illegal instruction (core dumped)
In dmesg:
Facility 'SCV' unavailable (12), exception at 0x7624f8134c0c,
MSR=900000000280f033
Version-Release number of selected component (if applicable):
qemu 5.2.0
Linux kernel 5.11
glibc 2.33
all latest updates as of submitting the bug report
How reproducible:
Always
Steps to Reproduce:
1. Run qemu with kvm acceleration
Actual results:
Illegal instruction
Expected results:
Normal VM execution
Additional info:
The machine is a Raptor Talos II Lite with a Sforza V1 8-core, but was also observed on a Raptor Blackbird with the same processor.
This was also observed on Fedora 34 beta, which uses glibc 2.33
Also tested on ArchPOWER (unofficial port of Arch Linux for ppc64le) with glibc 2.33
Fedora 33 and Ubuntu 20.10, both using glibc 2.32 do not have this issue, and downgrading the Linux kernel from 5.11 to 5.4 LTS on ArchPOWER solved the problem. Kernel 5.9 and 5.10 have the same issue when combined with glibc2.33
ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: qemu-system 1:5.2+dfsg-6ubuntu2
ProcVersionSignature: Ubuntu 5.11.0-11.12-generic 5.11.0
Uname: Linux 5.11.0-11-generic ppc64le
.sys.firmware.opal.msglog: Error: [Errno 13] Permission denied: '/sys/firmware/opal/msglog'
ApportVersion: 2.20.11-0ubuntu60
Architecture: ppc64el
CasperMD5CheckResult: pass
CurrentDesktop: Unity:Unity7:ubuntu
Date: Mon Mar 22 14:48:39 2021
InstallationDate: Installed on 2021-03-22 (0 days ago)
InstallationMedia: Ubuntu-Server 21.04 "Hirsute Hippo" - Alpha ppc64el (20210321)
KvmCmdLine: COMMAND STAT EUID RUID PID PPID %CPU COMMAND
ProcKernelCmdLine: root=UUID=f3d03315-0944-4a02-9c87-09c00eba9fa1 ro
ProcLoadAvg: 1.20 0.73 0.46 1/1054 6071
ProcSwaps:
Filename Type Size Used Priority
/swap.img file 8388544 0 -2
ProcVersion: Linux version 5.11.0-11-generic (buildd@bos02-ppc64el-002) (gcc (Ubuntu 10.2.1-20ubuntu1) 10.2.1 20210220, GNU ld (GNU Binutils for Ubuntu) 2.36.1) #12-Ubuntu SMP Mon Mar 1 19:26:20 UTC 2021
SourcePackage: qemu
UpgradeStatus: No upgrade log present (probably fresh install)
VarLogDump_list: total 0
acpidump:
cpu_cores: Number of cores present = 8
cpu_coreson: Number of cores online = 8
cpu_smt: SMT=4
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next prev parent reply other threads:[~2021-03-24 6:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
2021-03-23 11:03 ` [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration Christian Ehrhardt
2021-03-23 11:04 ` Christian Ehrhardt
2021-03-23 11:05 ` Christian Ehrhardt
2021-03-23 11:06 ` Christian Ehrhardt
2021-03-23 11:14 ` Frank Heimes
2021-03-23 11:23 ` Christian Ehrhardt
2021-03-23 14:37 ` Christian Ehrhardt
2021-03-23 16:52 ` Laurent Vivier
2021-03-23 17:17 ` Laurent Vivier
2021-03-23 17:30 ` [Bug 1920784] Status changed to Confirmed Ubuntu Kernel Bot
2021-03-23 20:43 ` [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration Frank Heimes
2021-03-23 23:30 ` sadoon albader
2021-03-24 6:41 ` Christian Ehrhardt [this message]
2021-03-24 6:44 ` Christian Ehrhardt
2021-03-24 14:40 ` Frank Heimes
2021-03-24 15:32 ` Tim Gardner
2021-03-29 5:42 ` Thomas Huth
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