[XenPPC] bad to worse for Xen on Mambo

[Mark F Mergen <mergen@xxxxxxxxxx>]

Things have gone from bad to worse for
me, likely being the only person currently trying to run Xen on Mambo.
 You may (or may not) recall my previous note of Nov 12 (copied at
the bottom of this note) where I described symptoms that had Xen loaded,
executing and complaining that theDom0 image was not Xen-compatible Elf.
 I haven't had time to follow any advice given then to debug this,
but I have kept current builds with all changes pushed since then.  The
symptoms have remained the same until today, when I pulled changes described
in 5 patchbot emails (4 Xen, 1 Linux).  Builds are clean.  Now,
with trees as pushed (no mods of mine) the symptoms are as immediately
below.  It seems that boot_of is failing before Xen is loaded and
executing.

I am on vacation this week in the midwest,
but eventually I will get around to working on this.  First, I will
probably rebuild Mambo to be current, since mine is from August, but I
doubt that will change anything.  Then, I will probably pull trees
from about Nov 9 or 10, to get a system that runs on Mambo, and apply patches
one at a time to isolate the patches that cause these two problems.  In
the meantime, if anyone else cares about Xen on Mambo, they will likely
first encounter this boot_of failure and, if they fix it, then encounter
the Dom0 not Elf problem.  Any advice for me ( when I eventually work
on this) or debugging of this by others is, of course, quite welcome.

Thanks, Mark


mergen@klinux1:/a/kix/homes/kix/mergen/mambo-x86/mambo/run/gpul/xen$
../run_cmdline -f xen.tcl
Using xen.tcl instead of .systemsim.tcl
Licensed Materials - Property of IBM.
(C) Copyright IBM Corporation 2001,
2006
All Rights Reserved.
To debug mambo with gdb: attach 14799
Set RTC to 22:26:59 of 6/13/2002
WARNING: 0: **unused** mysim: /UART/enabled
= off
WARNING: 0: **unused** mysim: /UART/end
= 0
WARNING: 0: **unused** mysim: /UART/frequency
= 1/10000
WARNING: 0: **unused** mysim: /UART/intr
= 0
WARNING: 0: **unused** mysim: /UART/start
= 0
WARNING: 0: **unused** mysim: kdebug_enable
= 1
WARNING: 0: **unused** mysim: kdebug_real
= 0x2042000
WARNING: 0: **unused** mysim: kdebug_size
= 0x4000000
WARNING: 0: **unused** mysim: kdebug_virtual
= 0xC000000000000000
LOAD : Opening ELF image file: xen
Elf text start address saved is 0x0000000000400000
LOAD : ELF startup: PC=0x0000000000400000,
msr=0x1000000000000000
LOAD :          
   gpr[1]=0x000000001FFFFF90, gpr[2]=0x0000000000000000
loading dom0 from: dom0
systemsim % c
27905: (27948): ---------------------------------------------------
37902: (37963): OF: Xen/PPC version
3.0-unstable (mergen@xxxxxxxxxxxxxx) (gcc version 4.1.2 20060613 (prerelease)
(Debian 4.1.1-5)) Wed Nov 22 23:48:34 EST 2006
45152: (45224): boot_of_init args: 0x500000
0x6a0578 0xf0000000 0x0 0x0
46367: (46440): boot msr: 0x1000000030000000
51441: (51521): boot_of_init: _start
0000000000400000 _end 00000000004d52b0 0x0
66278: (66364): bootargs = xen -- init=/bin/bash
iommu=off lpj=0x260000
71817: (71912): boot_of_module: Dom0
was loaded and found using r3/r4:0x500000[size 0x6a0578]
74133: (74230): mod0: 177 E L F
78812: (78915): boot_of_module: dom0
mod @ 0x0000000000500000[0xba0578]
83985: (84096): boot_of_module: dom0
mod string: init=/bin/bash iommu=off lpj=0x260000
88284: (88397): Could not allocate RTAS
tree

89773: (89886): HANG

Mark F Mergen/Watson/IBM

11/12/2006 02:14 PM

To	xen-ppc-devel@xxxxxxxxxxxxxxxxxxx
cc
Subject	Xen says Linux dom0 is not a Xen-compatible Elf image

I was current with linux-ppc-2.6.hg
and xenppc-unstable.hg as of about Thursday and my noHV systems were woking
fine.  This weekend, I pulled changes from both trees and rebuilt
everything.  Now, I get the following error during bringup.  This
occurs even with totally unmodified trees (the messages below were produced
by such unmodified trees).  Was there a change in expected executable
file format?  Do I need to change my config and make procedures?  Were
there corresponding changes to Mambo required and do I need to rebuild
Mambo?

Thanks, Mark


(XEN) allocated RMA for Dom[0]: 0x4000000[0x4000000]
(XEN) Scrubbing Free RAM: ......done.
(XEN) Trying Dom0 as 64bit ELF
(XEN) DOM0 image is not a Xen-compatible
Elf image.
(XEN) Trying Dom0 as 32bit ELF
(XEN) DOM0 image is not a Xen-compatible
Elf image.
(XEN) 
(XEN) ****************************************
(XEN) Panic on CPU 0:
(XEN) Could not set up DOM0 guest OS
(XEN) ****************************************
(XEN) 
(XEN) Reboot in five seconds...
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