* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
@ 2021-03-23 11:03 ` Christian Ehrhardt
2021-03-23 11:04 ` Christian Ehrhardt
` (15 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-23 11:03 UTC (permalink / raw)
To: qemu-devel
Since this seems to be broken on all Distributions as soon as the triggering
combination of kernel/glibc is present I think we'd want to open that up to
upstream qemu for a wider discussion and to also hit the ppc64 architecture
experts.
Furthermore I'm not entirely sure if this needs to be fixed in qemu, it
might instead be the case that instead a fix is needed in glibc.
Therefore I'm adding a qemu (upstream) bug task for now to have the bug
reported there as well (might be worth for awareness anyway) - but
chances are that after some debugging it will turn out to become a glibc
issue instead.
If only I could break this test out of kvm ioctl into something simpler,
then we could then properly file against glibc ....
** Also affects: glibc (Ubuntu)
Importance: Undecided
Status: New
** Also affects: qemu
Importance: Undecided
Status: New
--
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https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[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
` (14 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-23 11:04 UTC (permalink / raw)
To: qemu-devel
Hi Sadoon,
thanks for the report!
There isn't much to find about this issue yet.
One automatic syscaller crash report [1].
On the emulation side there is [2][3].
On the glibc side we have [4][5] adding the use of it with [6] being a fix.
All those seem to be in glibc 2.33 - so I'd expect with [6] it should only
be issued on power9 which in turn should HW-support the instruction.
I was trying to recreate this on power8 and power9 machines.
As expected on power8 just nothing happens (the instruction isn't used due to [6]).
TBH I first wondered if these Sforza chips [7][8][9] you mentioned are
fully identical to a classic IBM p9 box - but I was indeed able to reproduce
the issue just fine on an IBM-sold P9
dmesg:
[ 1516.438442] Facility 'SCV' unavailable (12), exception at 0x76c9f84c49a0, MSR=900000000280f033
[ 1516.438472] qemu-system-ppc[42884]: illegal instruction (4) at 76c9f84c49a0 nip 76c9f84c49a0 lr 1f12839d9f0 code 1 in libc-2.33.so[76c9f8380000+220000]
[ 1516.438489] qemu-system-ppc[42884]: code: e8010010 7c0803a6 4e800020 60420000 7ca42b78 4bffed65 60000000 38210020
[ 1516.438493] qemu-system-ppc[42884]: code: e8010010 7c0803a6 4e800020 60420000 <44000001> 4bffffb8 60000000 60420000
The chip I used for this test is:
Model: 2.2 (pvr 004e 1202)
Model name: POWER9, altivec supported
The syscall this crashes in belongs to the ioctl
(gdb) bt
#0 __GI___ioctl (fd=<optimized out>, request=536915584) at ../sysdeps/unix/sysv/linux/powerpc/ioctl.c:56
#1 0x00000cb63ef7d9f0 in kvm_vcpu_ioctl (cpu=cpu@entry=0x7d0f48010010, type=type@entry=536915584) at ../../accel/kvm/kvm-all.c:2654
#2 0x00000cb63ef7dbdc in kvm_cpu_exec (cpu=0x7d0f48010010) at ../../accel/kvm/kvm-all.c:2491
#3 0x00000cb63ee78344 in kvm_vcpu_thread_fn (arg=0x7d0f48010010) at ../../accel/kvm/kvm-cpus.c:49
#4 0x00000cb63f1d14bc in qemu_thread_start (args=<optimized out>) at ../../util/qemu-thread-posix.c:521
#5 0x00007d0f4ac69114 in start_thread (arg=0x7d0f23dfe720) at pthread_create.c:473
#6 0x00007d0f4ab755c0 in clone () at ../sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S:103
And jumping into the code of the __GI___ioctl we can clearly see
the scv instruction is indeed there in the executed code path:
0x7ffff66c4984 <__GI___ioctl+292> bl 0x7ffff66c36e8 <__GI___tcgetattr+8>
0x7ffff66c4988 <__GI___ioctl+296> nop
0x7ffff66c498c <__GI___ioctl+300> addi r1,r1,32
0x7ffff66c4990 <__GI___ioctl+304> ld r0,16(r1)
0x7ffff66c4994 <__GI___ioctl+308> mtlr r0
0x7ffff66c4998 <__GI___ioctl+312> blr
0x7ffff66c499c <__GI___ioctl+316> ori r2,r2,0
>0x7ffff66c49a0 <__GI___ioctl+320> scv 0
[1]: https://webcache.googleusercontent.com/search?q=cache:uS0jhPekyqMJ:https://syzkaller-ppc64.appspot.com/text%3Ftag%3DCrashReport%26x%3D17d99883000000+&cd=2&hl=de&ct=clnk&gl=uk
[2]: https://git.qemu.org/?p=qemu.git;a=commit;h=3c89b8d6ac5b8728cd7620f9885bd953edd18a11
[3]: https://lists.gnu.org/archive/html/qemu-devel/2021-03/msg05425.html
[4]: https://sourceware.org/git/?p=glibc.git;a=commit;h=68ab82f56690ada86ac1e0c46bad06ba189a10ef
[5]: https://sourceware.org/git/?p=glibc.git;a=commit;h=41f013cef24884604c303435dd1915be2ea5c0e0
[6]: https://sourceware.org/git/?p=glibc.git;a=commit;h=527c89cd32f8522859f58343be3d3dc8f754b783
[7]: https://wiki.raptorcs.com/wiki/Sforza
[8]: https://wiki.raptorcs.com/wiki/Talos_II
[9]: https://wiki.raptorcs.com/wiki/POWER9
[10]: https://lwn.net/Articles/822867/
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[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
` (13 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-23 11:05 UTC (permalink / raw)
To: qemu-devel
qemu calls this ioctl on ppc64 as:
sysdeps/unix/sysv/linux/powerpc/ioctl.c
result = INLINE_SYSCALL (ioctl, 3, fd, request, arg);
The mapping of macros in sysdeps/unix/sysv/linux/powerpc/sysdep.h seems to be:
INTERNAL_SYSCALL -> INTERNAL_SYSCALL_NCS -> TRY_SYSCALL_SCV -> SYSCALL_SCV
76 #define SYSCALL_SCV(nr) \
77 ({ \
78 __asm__ __volatile__ \
79 (".machine \"push\"\n\t" \
80 ".machine \"power9\"\n\t" \
81 "scv 0\n\t" \
82 ".machine \"pop\"\n\t" \
83 "0:" \
84 : "=&r" (r0), \
85 "=&r" (r3), "=&r" (r4), "=&r" (r5), \
86 "=&r" (r6), "=&r" (r7), "=&r" (r8) \
87 : ASM_INPUT_##nr \
88 : "r9", "r10", "r11", "r12", \
89 "lr", "ctr", "memory"); \
90 r3; \
91 })
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (2 preceding siblings ...)
2021-03-23 11:05 ` Christian Ehrhardt
@ 2021-03-23 11:06 ` Christian Ehrhardt
2021-03-23 11:14 ` Frank Heimes
` (12 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-23 11:06 UTC (permalink / raw)
To: qemu-devel
[10] outlined to use PPC_FEATURE2_SCV but [4] does just that.
In addition [6] added power9 machine settings as only on this ISA it
is available - like:
+ .machine "push"
+ .machine "power9"
scv 0
+ .machine "pop"
Maybe there is some generated "scv 0" left that needs the same [6]
treatment?
OTOH In a normal test program I can run "scv 0" just fine.
But not other scv levels (expected).
# cat test.c
#include <stdio.h>
int main() {
printf("Hello scv 0\n");
__asm__(
"scv 0\n\t"
);
printf("survived\n");
__asm__(
"scv 1\n\t"
);
printf("survived level 1\n");
return 0;
}
# gcc -Wall -o test test.c
./test
Hello scv 0
survived
Illegal instruction (core dumped)
IIRC .machine is only a psedo-op for the assembler.
So it is correct that I can't see it in the live disassembly of gdb.
The failing "svc 0" from glibcs __GI___ioctl is
0x00007ffff66c49a0 <+320>: 01 00 00 44 scv 0
And in my test program it is
0x0000000100000848 <+44>: 01 00 00 44 scv 0
Hmm, this is the same opcode but fails in just one of the cases.
This might need someone being more an ppc64/glibc expert than me :-/
@Frank - could you modify this bug to become mirrored to IBM for their
arch-expertise please?
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (3 preceding siblings ...)
2021-03-23 11:06 ` Christian Ehrhardt
@ 2021-03-23 11:14 ` Frank Heimes
2021-03-23 11:23 ` Christian Ehrhardt
` (11 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Frank Heimes @ 2021-03-23 11:14 UTC (permalink / raw)
To: qemu-devel
** Also affects: ubuntu-power-systems
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (4 preceding siblings ...)
2021-03-23 11:14 ` Frank Heimes
@ 2021-03-23 11:23 ` Christian Ehrhardt
2021-03-23 14:37 ` Christian Ehrhardt
` (10 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-23 11:23 UTC (permalink / raw)
To: qemu-devel
As my other repro-code didn't trigger the issue I looked at qemu again
and found that before the failing ioctl->scv call there are plenty other
even some very similar (same?) calls that work just fine.
I wonder if on guest setup qemu (or e.g. the rom we load) might set some
arch-bits or such which then breaks the next "scv 0" call.
I attached the full ioctl log here.
** Attachment added: "ioctl log of qemu until the crash happens"
https://bugs.launchpad.net/qemu/+bug/1920784/+attachment/5480011/+files/qemu-ioctls-util-crash.txt
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (5 preceding siblings ...)
2021-03-23 11:23 ` Christian Ehrhardt
@ 2021-03-23 14:37 ` Christian Ehrhardt
2021-03-23 16:52 ` Laurent Vivier
` (9 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-23 14:37 UTC (permalink / raw)
To: qemu-devel
I might be spoiled by the s390x-POP style to define instructions, but in
the following doc about the PowerISA unfortunately there is no list of
reasons-for-SIGILL. Therefore I'm out of options on this waiting for
someone - most likely IBM - to chime in.
https://wiki.raptorcs.com/w/images/f/f5/PowerISA_public.v3.1.pdf
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (6 preceding siblings ...)
2021-03-23 14:37 ` Christian Ehrhardt
@ 2021-03-23 16:52 ` Laurent Vivier
2021-03-23 17:17 ` Laurent Vivier
` (8 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Laurent Vivier @ 2021-03-23 16:52 UTC (permalink / raw)
To: qemu-devel
You need a kernel with a the following fix for POWER9:
commit 25edcc50d76c834479d11fcc7de46f3da4d95121
Author: Fabiano Rosas <farosas@linux.ibm.com>
Date: Thu Feb 4 17:05:17 2021 -0300
KVM: PPC: Book3S HV: Save and restore FSCR in the P9 path
The Facility Status and Control Register is a privileged SPR that
defines the availability of some features in problem state. Since it
can be written by the guest, we must restore it to the previous host
value after guest exit.
This restoration is currently done by taking the value from
current->thread.fscr, which in the P9 path is not enough anymore
because the guest could context switch the QEMU thread, causing the
guest-current value to be saved into the thread struct.
The above situation manifested when running a QEMU linked against a
libc with System Call Vectored support, which causes scv
instructions to be run by QEMU early during the guest boot (during
SLOF), at which point the FSCR is 0 due to guest entry. After a few
scv calls (1 to a couple hundred), the context switching happens and
the QEMU thread runs with the guest value, resulting in a Facility
Unavailable interrupt.
This patch saves and restores the host value of FSCR in the inner
guest entry loop in a way independent of current->thread.fscr. The old
way of doing it is still kept in place because it works for the old
entry path.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.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/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (7 preceding siblings ...)
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
` (7 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Laurent Vivier @ 2021-03-23 17:17 UTC (permalink / raw)
To: qemu-devel
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Status changed to Confirmed
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (8 preceding siblings ...)
2021-03-23 17:17 ` Laurent Vivier
@ 2021-03-23 17:30 ` Ubuntu Kernel Bot
2021-03-23 20:43 ` [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration Frank Heimes
` (6 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Ubuntu Kernel Bot @ 2021-03-23 17:30 UTC (permalink / raw)
To: qemu-devel
This change was made by a bot.
** Changed in: linux (Ubuntu)
Status: New => Confirmed
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
New
Status in glibc package in Ubuntu:
New
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (9 preceding siblings ...)
2021-03-23 17:30 ` [Bug 1920784] Status changed to Confirmed Ubuntu Kernel Bot
@ 2021-03-23 20:43 ` Frank Heimes
2021-03-23 23:30 ` sadoon albader
` (5 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Frank Heimes @ 2021-03-23 20:43 UTC (permalink / raw)
To: qemu-devel
Thx Laurent, I took the hirsute master-next source and cherry-picked the patch and it applied cleanly.
Now I kicked off a kernel build of this patched kernel in the following PPA:
https://launchpad.net/~fheimes/+archive/ubuntu/lp1920784
(however, the builds will take some time to complete)
If it can be proofed that this patched kernel fixes the problem, I can
go ahead and work on a patch submission for hirsute/21.04. (kernel
freeze is April 8th)
** Changed in: ubuntu-power-systems
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Frank Heimes (fheimes)
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
Confirmed
Status in glibc package in Ubuntu:
New
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (10 preceding siblings ...)
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
` (4 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: sadoon albader @ 2021-03-23 23:30 UTC (permalink / raw)
To: qemu-devel
The guys on the Fedora side seem to have found the patch to fix this:
https://bugzilla.redhat.com/show_bug.cgi?id=1941652#c6
Apparently it will go upstream in Linux 5.11, but earlier versions also
need the fix, specifically 5.9 and 5.10
Thank you!
** Bug watch added: Red Hat Bugzilla #1941652
https://bugzilla.redhat.com/show_bug.cgi?id=1941652
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in QEMU:
New
Status in The Ubuntu-power-systems project:
Confirmed
Status in glibc package in Ubuntu:
New
Status in linux package in Ubuntu:
Confirmed
Status in qemu package in Ubuntu:
Confirmed
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (11 preceding siblings ...)
2021-03-23 23:30 ` sadoon albader
@ 2021-03-24 6:41 ` Christian Ehrhardt
2021-03-24 6:44 ` Christian Ehrhardt
` (3 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-24 6:41 UTC (permalink / raw)
To: qemu-devel
@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
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (12 preceding siblings ...)
2021-03-24 6:41 ` Christian Ehrhardt
@ 2021-03-24 6:44 ` Christian Ehrhardt
2021-03-24 14:40 ` Frank Heimes
` (2 subsequent siblings)
16 siblings, 0 replies; 17+ messages in thread
From: Christian Ehrhardt @ 2021-03-24 6:44 UTC (permalink / raw)
To: qemu-devel
And gladly this was only added in >=5.9 and we have Groovy (5.8) and
Hirsute (5.11) so only the Hirsute kernel is needed to adapt, but
further backports are not needed.
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (13 preceding siblings ...)
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
16 siblings, 0 replies; 17+ messages in thread
From: Frank Heimes @ 2021-03-24 14:40 UTC (permalink / raw)
To: qemu-devel
The fix was sent to the kernel teams mailing list:
https://lists.ubuntu.com/archives/kernel-team/2021-March/thread.html#118449
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
** Changed in: ubuntu-power-systems
Status: Confirmed => In Progress
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
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:
In Progress
Status in glibc package in Ubuntu:
Invalid
Status in linux package in Ubuntu:
In Progress
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (14 preceding siblings ...)
2021-03-24 14:40 ` Frank Heimes
@ 2021-03-24 15:32 ` Tim Gardner
2021-03-29 5:42 ` Thomas Huth
16 siblings, 0 replies; 17+ messages in thread
From: Tim Gardner @ 2021-03-24 15:32 UTC (permalink / raw)
To: qemu-devel
** Also affects: glibc (Ubuntu Hirsute)
Importance: Undecided
Status: Invalid
** Also affects: qemu (Ubuntu Hirsute)
Importance: Undecided
Status: Invalid
** Also affects: linux (Ubuntu Hirsute)
Importance: Undecided
Assignee: Frank Heimes (fheimes)
Status: In Progress
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
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:
In Progress
Status in glibc package in Ubuntu:
Invalid
Status in linux package in Ubuntu:
In Progress
Status in qemu package in Ubuntu:
Invalid
Status in glibc source package in Hirsute:
Invalid
Status in linux source package in Hirsute:
In Progress
Status in qemu source package in Hirsute:
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1920784/+subscriptions
^ permalink raw reply [flat|nested] 17+ messages in thread* [Bug 1920784] Re: qemu-system-ppc64le fails with kvm acceleration
[not found] <161642496871.32717.8520198452991245606.malonedeb@soybean.canonical.com>
` (15 preceding siblings ...)
2021-03-24 15:32 ` Tim Gardner
@ 2021-03-29 5:42 ` Thomas Huth
16 siblings, 0 replies; 17+ messages in thread
From: Thomas Huth @ 2021-03-29 5:42 UTC (permalink / raw)
To: qemu-devel
** No longer affects: qemu
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1920784
Title:
qemu-system-ppc64le fails with kvm acceleration
Status in The Ubuntu-power-systems project:
In Progress
Status in glibc package in Ubuntu:
Invalid
Status in linux package in Ubuntu:
In Progress
Status in qemu package in Ubuntu:
Invalid
Status in glibc source package in Hirsute:
Invalid
Status in linux source package in Hirsute:
In Progress
Status in qemu source package in Hirsute:
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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