* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
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--- Comment #1 from madengineer10@gmail.com 2012-02-16 05:46:07 ---
Created an attachment (id=72393)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72393)
Configuration of the guest kernel
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--- Comment #2 from madengineer10@gmail.com 2012-02-16 05:47:18 ---
Created an attachment (id=72394)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72394)
Result of 'registers info' and 'x/30i $eip' after fault
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madengineer10@gmail.com changed:
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--- Comment #3 from madengineer10@gmail.com 2012-02-16 05:57:25 ---
Couldn't attach the trace I recorded of the fault occurring since it's 3 MB
compressed with xz, bigger still with other formats. I can email it if it will
be useful.
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From: bugzilla-daemon @ 2012-02-16 6:32 UTC (permalink / raw)
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--- Comment #4 from madengineer10@gmail.com 2012-02-16 06:32:48 ---
Same problem occurs with qemu-kvm 1.0 from
https://launchpad.net/~bderzhavets/+archive/lib-usbredir39:
$ sudo kvm -M pc-1.0 -enable-kvm -m 1024 -drive
file=/var/lib/libvirt/images/eve.img,if=none,id=drive-ide0-0-0,format=raw
-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 -netdev
tap,fd=21,id=hostnet0 -device
e1000,netdev=hostnet0,id=net0,mac=52:54:00:b5:f4:00,bus=pci.0,addr=0x3 -chardev
vc,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb
-device usb-tablet,id=input0 -vga cirrus
kvm: -netdev tap,fd=21,id=hostnet0: TUNGETIFF ioctl() failed: Bad file
descriptor
TUNSETOFFLOAD ioctl() failed: Bad file descriptor
kvm: -device
e1000,netdev=hostnet0,id=net0,mac=52:54:00:b5:f4:00,bus=pci.0,addr=0x3:
pci_add_option_rom: failed to find romfile "pxe-e1000.rom"
KVM internal error. Suberror: 1
emulation failure
EAX=f6810000 EBX=0000003e ECX=0000003e EDX=c00b8000
ESI=c00b8000 EDI=c15b0000 EBP=c15b1f74 ESP=c15b1f58
EIP=c1228905 EFL=00010206 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =007b 00000000 ffffffff 00c0f300 DPL=3 DS [-WA]
CS =0060 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0068 00000000 ffffffff 00c09300 DPL=0 DS [-WA]
DS =007b 00000000 ffffffff 00c0f300 DPL=3 DS [-WA]
FS =0000 00000000 ffffffff 00000000
GS =0000 00000000 ffffffff 00000000
LDT=0000 00000000 ffffffff 00000000
TR =0080 c15b6300 0000206b 00008b00 DPL=0 TSS32-busy
GDT= c15b3000 000000ff
IDT= c15b2000 000007ff
CR0=80050033 CR2=ffee4000 CR3=01663000 CR4=00000690
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000
Code=8e 2b 01 00 00 8b 4d f0 89 f2 8b 45 ec 0f 0d 82 40 01 00 00 <0f> 6f 02 0f
6f 4a 08 0f 6f 52 10 0f 6f 5a 18 0f 7f 00 0f 7f 48 08 0f 7f 50 10 0f 7f 58 18
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From: bugzilla-daemon @ 2012-02-16 7:15 UTC (permalink / raw)
To: kvm
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Gleb <gleb@redhat.com> changed:
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----------------------------------------------------------------------------
CC| |gleb@redhat.com
--- Comment #5 from Gleb <gleb@redhat.com> 2012-02-16 07:15:49 ---
(In reply to comment #3)
> Couldn't attach the trace I recorded of the fault occurring since it's 3 MB
> compressed with xz, bigger still with other formats. I can email it if it will
> be useful.
Can you do "tail -10000" on it and attach it here?
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--- Comment #6 from madengineer10@gmail.com 2012-02-16 07:22:41 ---
Created an attachment (id=72395)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72395)
Last 10k lines of a trace showing the fault
Per Gleb's request
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--- Comment #7 from Gleb <gleb@redhat.com> 2012-02-16 07:43:11 ---
Have you installed trace-cmd before capturing the trace? It failed to parse kvm
events. qemu haven't paused the guest after emulation error (looks like a bug),
so 'x/30i $eip' output is not useful either. Can you do 'x/30i 0xXXX' where XXX
is the address in EIP from register dump you see after instruction emulation
failure message (c1228905 in your output from comment #4)?
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From: bugzilla-daemon @ 2012-02-16 7:56 UTC (permalink / raw)
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--- Comment #8 from madengineer10@gmail.com 2012-02-16 07:56:03 ---
Not sure what you mean by installing trace-cmd before capturing the trace--I
did do that, otherwise I wouldn't have had a trace-cmd to run. The package
version is trace-cmd 1.0.3-0ubuntu1 if that helps. I tried running it again
against qemu 1.0 (the last one was for qemu 0.14), still contained a bunch of
[FAILED TO PARSE] messages.
Attaching the output you requested separately.
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--- Comment #9 from madengineer10@gmail.com 2012-02-16 07:57:35 ---
Created an attachment (id=72397)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72397)
Register state and code disassembly at failure point with qemu 1.0
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From: bugzilla-daemon @ 2012-02-16 8:04 UTC (permalink / raw)
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--- Comment #10 from Gleb <gleb@redhat.com> 2012-02-16 08:04:22 ---
(In reply to comment #8)
> Not sure what you mean by installing trace-cmd before capturing the trace--I
> did do that, otherwise I wouldn't have had a trace-cmd to run. The package
I meant that if you compile it by yourself you need to run "make install"
instead of running it from where it was compiled. Otherwise it does not find
plugins. If you install it from package manager this is not relevant of course.
> version is trace-cmd 1.0.3-0ubuntu1 if that helps. I tried running it again
> against qemu 1.0 (the last one was for qemu 0.14), still contained a bunch of
> [FAILED TO PARSE] messages.
>
Something wrong with ubuntu trace-cmd then. Either it does not have kvm plugin
or it is too old.
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From: bugzilla-daemon @ 2012-02-16 8:31 UTC (permalink / raw)
To: kvm
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Jan Kiszka <jan.kiszka@web.de> changed:
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----------------------------------------------------------------------------
CC| |jan.kiszka@web.de
--- Comment #11 from Jan Kiszka <jan.kiszka@web.de> 2012-02-16 08:31:18 ---
(In reply to comment #4)
> Code=8e 2b 01 00 00 8b 4d f0 89 f2 8b 45 ec 0f 0d 82 40 01 00 00 <0f> 6f 02 0f
> 6f 4a 08 0f 6f 52 10 0f 6f 5a 18 0f 7f 00 0f 7f 48 08 0f 7f 50 10 0f 7f 58 18
This is "movq (%rdx),%mm0". Possibly still unsupported by the emulator.
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From: bugzilla-daemon @ 2012-02-16 8:40 UTC (permalink / raw)
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--- Comment #12 from Gleb <gleb@redhat.com> 2012-02-16 08:40:37 ---
Can you try disabling CONFIG_FB in your guest kernel?
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From: bugzilla-daemon @ 2012-02-16 11:40 UTC (permalink / raw)
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Avi Kivity <avi@redhat.com> changed:
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----------------------------------------------------------------------------
CC| |avi@redhat.com
--- Comment #13 from Avi Kivity <avi@redhat.com> 2012-02-16 11:40:22 ---
Indeed the emulator doesn't support mmx yet. But why is the kernel using mmx
instead of sse?
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--- Comment #14 from Jan Kiszka <jan.kiszka@web.de> 2012-02-16 11:51:05 ---
Because the selected CPU type doesn't support SSE? Didn't check the config yet,
but I bet that's the reason.
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From: bugzilla-daemon @ 2012-02-16 16:48 UTC (permalink / raw)
To: kvm
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--- Comment #15 from madengineer10@gmail.com 2012-02-16 16:48:56 ---
I set the kernel up for an AMD Geode LX800 (CONFIG_MGEODE_LX), which does
supposedly support SSE. No idea why it would have built using MMX if that is
now deprecated in favor of SSE.
I can try disabling the framebuffer
(CONFIG_FB/CONFIG_FB_GEODE/CONFIG_FB_GEODE_LX) for testing purposes;
unfortunately this wouldn't work for the real thing, since we need it for the
Qt-based user interface.
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--- Comment #16 from madengineer10@gmail.com 2012-02-16 16:51:10 ---
Background: I'm using KVM as a test platform for code destined for a panel PC
using a Geode LX800.
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From: bugzilla-daemon @ 2012-02-16 17:24 UTC (permalink / raw)
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--- Comment #17 from Jan Kiszka <jan.kiszka@web.de> 2012-02-16 17:24:34 ---
(In reply to comment #15)
> I set the kernel up for an AMD Geode LX800 (CONFIG_MGEODE_LX), which does
> supposedly support SSE. No idea why it would have built using MMX if that is
> now deprecated in favor of SSE.
At least not according to the Linux configuration: MGEODE_LX only sets
X86_USE_3DNOW, thus MMX.
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From: bugzilla-daemon @ 2012-02-16 17:30 UTC (permalink / raw)
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--- Comment #18 from Avi Kivity <avi@redhat.com> 2012-02-16 17:30:47 ---
As a workaround you can use -cpu blah,-3dnow. But we'll have to implement mmx
movq.
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From: bugzilla-daemon @ 2012-02-16 22:01 UTC (permalink / raw)
To: kvm
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--- Comment #19 from madengineer10@gmail.com 2012-02-16 22:01:38 ---
Doesn't seem to help. I used -cpu core2duo,-3dnow (since core2duo is the name
that libvirt, my usual launcher for qemu, has been using), failed on the same
movq. Also tried -cpu core2duo,-3dnow,-mmx, same results. I'll see if I can
build a kernel with the Geode framebuffer driver but without setting the CPU to
Geode (thus eliminating the use of MMX).
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-03-21 18:21 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #20 from Avi Kivity <avi@redhat.com> 2012-03-21 18:21:33 ---
Please try
git://git.kernel.org/pub/scm/virt/kvm/kvm.git emulator-movq
this emulates the two movq instructions used. There may be other unemulated
instructions though.
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-03-31 20:10 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #21 from madengineer10@gmail.com 2012-03-31 20:10:38 ---
Sorry for the delay, I've been really busy lately. Is this kernel reasonably
safe to run on my main machine? I'm not worried about it crashing, but if it
takes a filesystem with it...
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-01 14:15 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #22 from Avi Kivity <avi@redhat.com> 2012-04-01 14:15:51 ---
No guarantees of course, but this is just 3.3-rc5 with a few patches on top.
It should be fine for a short test.
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-01 23:38 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #23 from madengineer10@gmail.com 2012-04-01 23:38:21 ---
Now it dies in a different place, still with a movq instruction (movq
(%edx),%mm0). I think the difference is because of a configuration change or
package update since the last test, because the fault happens at the same
address and same instruction under both the patched 3.3rc5 and 3.0.20.
Unfortunately I've no idea what the configuration change might have been, and I
didn't think to save a VM disk image from the previous tests.
I also got a more recent trace-cmd built and installed, so there is usable
trace output now. Still huge, so I'll post the last 10k lines as before.
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-01 23:39 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #24 from madengineer10@gmail.com 2012-04-01 23:39:47 ---
Created an attachment (id=72788)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72788)
Register state and code disassembly at failure point, kernel 3.3rc5 with
patches
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-01 23:40 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #25 from madengineer10@gmail.com 2012-04-01 23:40:21 ---
Created an attachment (id=72789)
--> (https://bugzilla.kernel.org/attachment.cgi?id=72789)
Last 10k lines of a trace showing the fault, kernel 3.3rc5 with patches
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-04-02 9:12 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
--- Comment #26 from Avi Kivity <avi@redhat.com> 2012-04-02 09:12:38 ---
Strange, looks like the patches did not take effect at all. The opcode is 0f
6f 02, which should have been decoded as movq.
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-07-01 9:42 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
Florian Mickler <florian@mickler.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |florian@mickler.org
--- Comment #27 from Florian Mickler <florian@mickler.org> 2012-07-01 09:42:18 ---
A patch referencing this bug report has been merged in Linux v3.5-rc1:
commit e59717550e5cf0e7159c5b7af1d1ead35fef49dd
Author: Avi Kivity <avi@redhat.com>
Date: Mon Apr 9 18:40:03 2012 +0300
KVM: x86 emulator: implement MMX MOVQ (opcodes 0f 6f, 0f 7f)
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^ permalink raw reply [flat|nested] 31+ messages in thread* [Bug 42779] KVM domain hangs after loading initrd with Xenomai kernel
2012-02-16 5:45 [Bug 42779] New: KVM domain hangs after loading initrd with Xenomai kernel bugzilla-daemon
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From: bugzilla-daemon @ 2012-08-15 21:57 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=42779
Alan <alan@lxorguk.ukuu.org.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
CC| |alan@lxorguk.ukuu.org.uk
Resolution| |CODE_FIX
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