* [Qemu-devel] Emulation failure on booting/rebooting VMs
@ 2015-03-18 17:36 Mohammed Gamal
2015-03-18 17:39 ` Andrey Korolyov
2015-03-18 18:09 ` Kevin O'Connor
0 siblings, 2 replies; 5+ messages in thread
From: Mohammed Gamal @ 2015-03-18 17:36 UTC (permalink / raw)
To: ipxe-devel, seabios; +Cc: qemu-devel
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Hi,
I've been sporadically getting my KVM virtual machines crashing with this
message while they're booting
KVM internal error. Suberror: 1
emulation failure
EAX=00000000 EBX=00000000 ECX=00000000 EDX=00600f12
ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fffa
EIP=0000ff53 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 00000000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =0000 00000000 0000ffff 00009200
DS =0000 00000000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008300
GDT= 00000000 0000ffff
IDT= 00000000 0000ffff
CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
EFER=0000000000000000
Code=74 65 61 6d 2e 00 66 68 5f 55 00 00 e9 c3 f8 fb f4 cb 66 c3 <cf> 66 68
ff e6 00 00 e9 8b b1 66 55 66 57 66 56 66 53 66 89 c1 66 89 d6 a8 07 75 23
66 0f
I am running qemu 1.2, seabios 1.7.3 and ipxe (1.0.0-f6840ba) and the host
CPU is AMD Opteron 6386 SE running kernel 3.4.71.
I digged a little into the kvm kernel module code and I can trace these
emulation failures only to either a call to pf_interception() - which is
highly unlikely since the machine doesn't appear to have setup paging yet -
and task_switch_interception(). I am suspecting that ipxe or seabios might
be executing some invalid code or something, since this failure only
appears sporadically and is not 100% reproducible. Any ideas why this might
be happening?
Regards,
Mohammed
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Qemu-devel] Emulation failure on booting/rebooting VMs
2015-03-18 17:36 [Qemu-devel] Emulation failure on booting/rebooting VMs Mohammed Gamal
@ 2015-03-18 17:39 ` Andrey Korolyov
2015-03-18 18:09 ` Kevin O'Connor
1 sibling, 0 replies; 5+ messages in thread
From: Andrey Korolyov @ 2015-03-18 17:39 UTC (permalink / raw)
To: Mohammed Gamal; +Cc: ipxe-devel, seabios, qemu-devel
On Wed, Mar 18, 2015 at 8:36 PM, Mohammed Gamal
<mohammed.gamal@profitbricks.com> wrote:
> Hi,
> I've been sporadically getting my KVM virtual machines crashing with this
> message while they're booting
>
> KVM internal error. Suberror: 1
> emulation failure
> EAX=00000000 EBX=00000000 ECX=00000000 EDX=00600f12
> ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fffa
> EIP=0000ff53 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
> ES =0000 00000000 0000ffff 00009300
> CS =f000 000f0000 0000ffff 00009b00
> SS =0000 00000000 0000ffff 00009200
> DS =0000 00000000 0000ffff 00009300
> FS =0000 00000000 0000ffff 00009300
> GS =0000 00000000 0000ffff 00009300
> LDT=0000 00000000 0000ffff 00008200
> TR =0000 00000000 0000ffff 00008300
> GDT= 00000000 0000ffff
> IDT= 00000000 0000ffff
> CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
> DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
> DR3=0000000000000000
> DR6=00000000ffff0ff0 DR7=0000000000000400
> EFER=0000000000000000
> Code=74 65 61 6d 2e 00 66 68 5f 55 00 00 e9 c3 f8 fb f4 cb 66 c3 <cf> 66 68
> ff e6 00 00 e9 8b b1 66 55 66 57 66 56 66 53 66 89 c1 66 89 d6 a8 07 75 23
> 66 0f
>
> I am running qemu 1.2, seabios 1.7.3 and ipxe (1.0.0-f6840ba) and the host
> CPU is AMD Opteron 6386 SE running kernel 3.4.71.
>
> I digged a little into the kvm kernel module code and I can trace these
> emulation failures only to either a call to pf_interception() - which is
> highly unlikely since the machine doesn't appear to have setup paging yet -
> and task_switch_interception(). I am suspecting that ipxe or seabios might
> be executing some invalid code or something, since this failure only appears
> sporadically and is not 100% reproducible. Any ideas why this might be
> happening?
>
> Regards,
> Mohammed
Hello, would you mind to try seabios 1.8.1?
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Qemu-devel] Emulation failure on booting/rebooting VMs
2015-03-18 17:36 [Qemu-devel] Emulation failure on booting/rebooting VMs Mohammed Gamal
2015-03-18 17:39 ` Andrey Korolyov
@ 2015-03-18 18:09 ` Kevin O'Connor
2015-03-19 18:31 ` Mohammed Gamal
1 sibling, 1 reply; 5+ messages in thread
From: Kevin O'Connor @ 2015-03-18 18:09 UTC (permalink / raw)
To: Mohammed Gamal; +Cc: ipxe-devel, seabios, qemu-devel
On Wed, Mar 18, 2015 at 06:36:48PM +0100, Mohammed Gamal wrote:
> Hi,
> I've been sporadically getting my KVM virtual machines crashing with this
> message while they're booting
>
> KVM internal error. Suberror: 1
> emulation failure
> EAX=00000000 EBX=00000000 ECX=00000000 EDX=00600f12
> ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fffa
> EIP=0000ff53 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
> ES =0000 00000000 0000ffff 00009300
> CS =f000 000f0000 0000ffff 00009b00
> SS =0000 00000000 0000ffff 00009200
> DS =0000 00000000 0000ffff 00009300
> FS =0000 00000000 0000ffff 00009300
> GS =0000 00000000 0000ffff 00009300
> LDT=0000 00000000 0000ffff 00008200
> TR =0000 00000000 0000ffff 00008300
> GDT= 00000000 0000ffff
> IDT= 00000000 0000ffff
> CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
> DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
> DR3=0000000000000000
> DR6=00000000ffff0ff0 DR7=0000000000000400
> EFER=0000000000000000
> Code=74 65 61 6d 2e 00 66 68 5f 55 00 00 e9 c3 f8 fb f4 cb 66 c3 <cf> 66 68
> ff e6 00 00 e9 8b b1 66 55 66 57 66 56 66 53 66 89 c1 66 89 d6 a8 07 75 23
> 66 0f
>
> I am running qemu 1.2, seabios 1.7.3 and ipxe (1.0.0-f6840ba) and the host
> CPU is AMD Opteron 6386 SE running kernel 3.4.71.
To debug seabios issues, we need the full log - see:
http://www.seabios.org/Debugging
But, your software versions are a bit old which makes diagnosing any
issues hard. I suggest updating to the latest software and seeing if
the problem is still present.
-Kevin
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Qemu-devel] Emulation failure on booting/rebooting VMs
2015-03-18 18:09 ` Kevin O'Connor
@ 2015-03-19 18:31 ` Mohammed Gamal
2015-03-20 7:54 ` [Qemu-devel] [ipxe-devel] " Robin Smidsrød
0 siblings, 1 reply; 5+ messages in thread
From: Mohammed Gamal @ 2015-03-19 18:31 UTC (permalink / raw)
To: Kevin O'Connor; +Cc: ipxe-devel, seabios, qemu-devel
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On Wed, Mar 18, 2015 at 7:09 PM, Kevin O'Connor <kevin@koconnor.net> wrote:
> On Wed, Mar 18, 2015 at 06:36:48PM +0100, Mohammed Gamal wrote:
> > Hi,
> > I've been sporadically getting my KVM virtual machines crashing with this
> > message while they're booting
> >
> > KVM internal error. Suberror: 1
> > emulation failure
> > EAX=00000000 EBX=00000000 ECX=00000000 EDX=00600f12
> > ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fffa
> > EIP=0000ff53 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
> > ES =0000 00000000 0000ffff 00009300
> > CS =f000 000f0000 0000ffff 00009b00
> > SS =0000 00000000 0000ffff 00009200
> > DS =0000 00000000 0000ffff 00009300
> > FS =0000 00000000 0000ffff 00009300
> > GS =0000 00000000 0000ffff 00009300
> > LDT=0000 00000000 0000ffff 00008200
> > TR =0000 00000000 0000ffff 00008300
> > GDT= 00000000 0000ffff
> > IDT= 00000000 0000ffff
> > CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
> > DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
> > DR3=0000000000000000
> > DR6=00000000ffff0ff0 DR7=0000000000000400
> > EFER=0000000000000000
> > Code=74 65 61 6d 2e 00 66 68 5f 55 00 00 e9 c3 f8 fb f4 cb 66 c3 <cf> 66
> 68
> > ff e6 00 00 e9 8b b1 66 55 66 57 66 56 66 53 66 89 c1 66 89 d6 a8 07 75
> 23
> > 66 0f
> >
> > I am running qemu 1.2, seabios 1.7.3 and ipxe (1.0.0-f6840ba) and the
> host
> > CPU is AMD Opteron 6386 SE running kernel 3.4.71.
>
> To debug seabios issues, we need the full log - see:
> http://www.seabios.org/Debugging
>
> But, your software versions are a bit old which makes diagnosing any
> issues hard. I suggest updating to the latest software and seeing if
> the problem is still present.
>
> -Kevin
>
Unfortunately I can't change that setup. The problem is also rather
sporadic so I have no other means to reproduce it and debug it.
I tried looking into the seabios code but it looks like the instruction
pointer is pointing at the default interrupt vector table entry
'entry_iret_official'. I presume this means that was triggered with an
interrupt of some sort? The other register values don't seem to provide any
clues nevertheless.
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Qemu-devel] [ipxe-devel] Emulation failure on booting/rebooting VMs
2015-03-19 18:31 ` Mohammed Gamal
@ 2015-03-20 7:54 ` Robin Smidsrød
0 siblings, 0 replies; 5+ messages in thread
From: Robin Smidsrød @ 2015-03-20 7:54 UTC (permalink / raw)
To: Mohammed Gamal, Kevin O'Connor; +Cc: ipxe-devel, seabios, qemu-devel
On 19.03.2015 19:31, Mohammed Gamal wrote:
>
> On Wed, Mar 18, 2015 at 7:09 PM, Kevin O'Connor <kevin@koconnor.net
> <mailto:kevin@koconnor.net>> wrote:
>
> On Wed, Mar 18, 2015 at 06:36:48PM +0100, Mohammed Gamal wrote:
> > Hi,
> > I've been sporadically getting my KVM virtual machines crashing
> with this
> > message while they're booting
> >
> > KVM internal error. Suberror: 1
> > emulation failure
> > EAX=00000000 EBX=00000000 ECX=00000000 EDX=00600f12
> > ESI=00000000 EDI=00000000 EBP=00000000 ESP=0000fffa
> > EIP=0000ff53 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
> > ES =0000 00000000 0000ffff 00009300
> > CS =f000 000f0000 0000ffff 00009b00
> > SS =0000 00000000 0000ffff 00009200
> > DS =0000 00000000 0000ffff 00009300
> > FS =0000 00000000 0000ffff 00009300
> > GS =0000 00000000 0000ffff 00009300
> > LDT=0000 00000000 0000ffff 00008200
> > TR =0000 00000000 0000ffff 00008300
> > GDT= 00000000 0000ffff
> > IDT= 00000000 0000ffff
> > CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000
> > DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000
> > DR3=0000000000000000
> > DR6=00000000ffff0ff0 DR7=0000000000000400
> > EFER=0000000000000000
> > Code=74 65 61 6d 2e 00 66 68 5f 55 00 00 e9 c3 f8 fb f4 cb 66 c3
> <cf> 66 68
> > ff e6 00 00 e9 8b b1 66 55 66 57 66 56 66 53 66 89 c1 66 89 d6 a8
> 07 75 23
> > 66 0f
> >
> > I am running qemu 1.2, seabios 1.7.3 and ipxe (1.0.0-f6840ba) and
> the host
> > CPU is AMD Opteron 6386 SE running kernel 3.4.71.
>
> To debug seabios issues, we need the full log - see:
> http://www.seabios.org/Debugging
>
> But, your software versions are a bit old which makes diagnosing any
> issues hard. I suggest updating to the latest software and seeing if
> the problem is still present.
>
> -Kevin
>
>
> Unfortunately I can't change that setup. The problem is also rather
> sporadic so I have no other means to reproduce it and debug it.
> I tried looking into the seabios code but it looks like the instruction
> pointer is pointing at the default interrupt vector table entry
> 'entry_iret_official'. I presume this means that was triggered with an
> interrupt of some sort? The other register values don't seem to provide
> any clues nevertheless.
I thought maybe this commit was relevant,
https://git.ipxe.org/wimboot.git/commitdiff/1f11d05addc7aab9097b59e07680a0d1c05e34b3,
but noticed you're not using wimboot at all...
-- Robin
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2015-03-20 7:54 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-03-18 17:36 [Qemu-devel] Emulation failure on booting/rebooting VMs Mohammed Gamal
2015-03-18 17:39 ` Andrey Korolyov
2015-03-18 18:09 ` Kevin O'Connor
2015-03-19 18:31 ` Mohammed Gamal
2015-03-20 7:54 ` [Qemu-devel] [ipxe-devel] " Robin Smidsrød
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