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Re: [Qemu-devel] E5-2620v2 - emulation stop error
From: |
Kevin O'Connor |
Subject: |
Re: [Qemu-devel] E5-2620v2 - emulation stop error |
Date: |
Wed, 11 Mar 2015 13:37:38 -0400 |
User-agent: |
Mutt/1.5.23 (2014-03-12) |
On Wed, Mar 11, 2015 at 04:52:03PM +0000, Dr. David Alan Gilbert wrote:
> * Kevin O'Connor (address@hidden) wrote:
> > So, I couldn't get this to fail on my older AMD machine at all with
> > the default SeaBIOS code. But, when I change the code with the patch
> > below, it failed right away.
[...]
> > And the failed debug output looks like:
> >
> > SeaBIOS (version
> > rel-1.8.0-7-gd23eba6-dirty-20150311_121819-morn.localdomain)
> > [...]
> > cmos_smp_count0=20
> > [...]
> > cmos_smp_count=1
> > cmos_smp_count2=1/20
> > Found 1 cpu(s) max supported 20 cpu(s)
> >
> > I'm going to check the assembly for a compiler error, but is it
> > possible QEMU is returning incorrect data in cmos index 0x5f?
I checked the SeaBIOS assembler and it looks sane. So, I think the
question is, why is QEMU sometimes returning a 0 instead of 127 from
cmos 0x5f.
> > David, any chance you can recompile seabios and double check your
> > output?
>
> Done;
>
> =========== Working ===========
> SeaBIOS (version rel-1.8.0-0-g4c59f5d-dirty-20150311_164408-dgilbert-t530)
[...]
> cmos_smp_count0=20
> cmos_smp_count=20
> cmos_smp_count2=20/20
> Found 20 cpu(s) max supported 20 cpu(s)
[...]
> =========== Broken ===========
> SeaBIOS (version rel-1.8.0-0-g4c59f5d-dirty-20150311_164408-dgilbert-t530)
[...]
> cmos_smp_count0=20
> cmos_smp_count=1
> cmos_smp_count2=1/20
> Found 1 cpu(s) max supported 20 cpu(s)
That's the same pattern I see.
-Kevin
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, (continued)
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Bandan Das, 2015/03/10
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Paolo Bonzini, 2015/03/10
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/10
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/10
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Bandan Das, 2015/03/10
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Kevin O'Connor, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Kevin O'Connor, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error,
Kevin O'Connor <=
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Paolo Bonzini, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Bandan Das, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Kevin O'Connor, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Kevin O'Connor, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Kevin O'Connor, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Bandan Das, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Andrey Korolyov, 2015/03/11
- Re: [Qemu-devel] E5-2620v2 - emulation stop error, Dr. David Alan Gilbert, 2015/03/11