[Qemu-discuss] cannot boot PPC E500 vmlinux in Qemu 2.1.2

[Markus Stockhausen]

Hello,

I try to run a PPC VM inside qemu 2.1.2 with CPU type E500. Therfore I 
downloaded a kernel and initrd from the ubuntu provided netinst packages.

http://ports.ubuntu.com/ubuntu-ports/dists/trusty-updates/main/installer-powerpc/current/images/e500/netboot/

Host is a Fedora 21 distro and my start command looks like this. Its
a first iteration I have no HDD configured yet.

qemu-system-ppc -kernel /mnt/vmlinux -M ppce500 -nographic \
  -append "console=ttyS0" -initrd /mnt/initrd.gz -m 256

The machine boots up quite fine until it tries to do modprobing. It looks
like something is running havoc and memory gets exhausted. No matter
how much RAM is configured for the VM.

Console shows:

...
[    2.544763] PME2: fsl_pme2_db_init: not on ctrl-plane
[    2.545138] Freescale pme2 scan driver
[    2.545138] Freescale pme2 scan driver
[    2.545689] fsl-pme2-scan: device pme_scan registered
[    2.545689] fsl-pme2-scan: device pme_scan registered
[    2.549546] TCP: cubic registered
[    2.549546] TCP: cubic registered
[    2.551821] NET: Registered protocol family 10
[    2.551821] NET: Registered protocol family 10
[    2.561051] NET: Registered protocol family 17
[    2.561051] NET: Registered protocol family 17
[    2.561887] Key type dns_resolver registered
[    2.561887] Key type dns_resolver registered
[    2.564120] bootconsole [udbg0] disabled
[    2.564120] bootconsole [udbg0] disabled
[    2.564533] Loading compiled-in X.509 certificates
[    2.584291] Loaded X.509 cert 'Magrathea: Glacier signing key: 
c98d077ef22b25ae0e0a995ecb2b3daced7366d1'
[    2.584879] registered taskstats version 1
[    2.627580] modprobe[46]: unhandled signal 11 at 6cabcccc nip b7d2cd90 lr 
b7d2d0c4 code 30001
[    2.651179] modprobe[48]: unhandled signal 11 at 0000000c nip b7dd2ec0 lr 
b7dd30c4 code 30001
[    2.651743] swap_free: Bad swap file entry 38c0dcdb
[    2.652026] BUG: Bad page map in process modprobe  pte:c0dcdbc0c0dcdbe0 
pmd:cfb20000
[    2.652336] addr:10004000 vm_flags:00000875 anon_vma:  (null) 
mapping:cf9da5b4 index:4
[    2.652737] vma->vm_ops->fault: shmem_fault+0x0/0x210
[    2.652914] vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x70
[    2.653352] CPU: 0 PID: 48 Comm: modprobe Not tainted 3.13.0-40-powerpc-e500 
#69-Ubuntu
[    2.653665] Call Trace:
[    2.653859] [cfb27bf0] [c00080bc] show_stack+0xfc/0x1c0 (unreliable)
[    2.654564] [cfb27c40] [c080b884] dump_stack+0x78/0xa0
[    2.654746] [cfb27c50] [c0173c30] print_bad_pte+0x120/0x1f0
[    2.654915] [cfb27c80] [c01756c4] unmap_single_vma+0x254/0x620
[    2.655086] [cfb27d00] [c0176ea4] unmap_vmas+0x64/0xd0
[    2.655245] [cfb27d20] [c017f44c] exit_mmap+0xdc/0x190
[    2.655430] [cfb27d90] [c004d7f4] mmput+0x84/0x150
[    2.655571] [cfb27da0] [c0052d34] do_exit+0x284/0x980
[    2.655716] [cfb27df0] [c00534e4] do_group_exit+0x54/0xc0
[    2.655872] [cfb27e10] [c0066160] get_signal_to_deliver+0x170/0x570
[    2.656044] [cfb27e70] [c0008c2c] do_signal+0x4c/0x220
[    2.656193] [cfb27f30] [c0008f34] do_notify_resume+0x94/0xb0
[    2.656360] [cfb27f40] [c00111a8] do_user_signal+0x74/0xc4
[    2.656568] --- Exception: 300 at 0xb7dd2ec0
[    2.656568]     LR = 0xb7dd30c4
[    2.656921] Disabling lock debugging due to kernel taint
[    2.657121] swap_free: Bad swap file entry 08c0dcdc
[    2.657256] BUG: Bad page map in process modprobe  pte:c0dcdc00c0dcdc20 
pmd:cfb20000
[    2.657489] addr:10005000 vm_flags:00000875 anon_vma:  (null) 
mapping:cf9da5b4 index:5
[    2.657697] vma->vm_ops->fault: shmem_fault+0x0/0x210
[    2.657835] vma->vm_file->f_op->mmap: shmem_mmap+0x0/0x70
[    2.658040] CPU: 0 PID: 48 Comm: modprobe Tainted: G    B         
3.13.0-40-powerpc-e500 #69-Ubuntu
[    2.658490] Call Trace:
...

Any ideas?

Best regards.

Markus

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