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SubjectRe: linux-next: qemu boot failures with today's linux-next
Date
Stephen Rothwell <sfr@canb.auug.org.au> writes:
> Hi all,
>
> Today's linux-next tree does not boot in qemu (with kvm or without).
> Here is the (non-kvm) boot log (the kvm one is basically the same):
>
> ------------------------------------------------------
...
> Welcome to Open Firmware
>
> Copyright (c) 2004, 2017 IBM Corporation All rights reserved.
> This program and the accompanying materials are made available
> under the terms of the BSD License available at
> http://www.opensource.org/licenses/bsd-license.php
>
> Booting from memory...
> OF stdout device is: /vdevice/vty@71000000
> Preparing to boot Linux version 4.19.0-rc7 (sfr@ash) (gcc version 8.2.0 (Debian 8.2.0-4)) #2 SMP Mon Oct 15 18:53:28 AEDT 2018
^^^^^^^^^^
I assume that's wrong, this is actually linux-next you're booting?


> Detected machine type: 0000000000000101
> command line:
> Max number of cores passed to firmware: 2048 (NR_CPUS = 2048)
> Calling ibm,client-architecture-support... done
> memory layout at init:
> memory_limit : 0000000000000000 (16 MB aligned)
> alloc_bottom : 0000000001640000
> alloc_top : 0000000030000000
> alloc_top_hi : 0000000080000000
> rmo_top : 0000000030000000
> ram_top : 0000000080000000
> instantiating rtas at 0x000000002fff0000... done
> prom_hold_cpus: skipped
> copying OF device tree...
> Building dt strings...
> Building dt structure...
> Device tree strings 0x0000000001850000 -> 0x0000000001850a02
> Device tree struct 0x0000000001860000 -> 0x0000000001870000
> Quiescing Open Firmware ...
> Booting Linux via __start() @ 0x0000000000400000 ...
> ------------------------------------------------------
>
> I have no idea what may have caused this.

If you git Ctrl-a-c you should get the qemu prompt. Then you can run
'info registers' to print the regs and maybe see where it's stuck.

And/or build with EARLY_DEBUG_LPAR to get early console output.

cheers

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