Re: [Qemu-ppc] commit 08521e2 breaks SLOF usb boot

[Nikunj A Dadhania]

Nikunj A Dadhania <address@hidden> writes:
> commit 08521e28c7e6e8cc1f53424a0f845f58d2ed9546
> Author: Paolo Bonzini <address@hidden>
> Date:   Fri May 24 12:54:01 2013 +0200
>
>     memory: add big endian support to access_with_adjusted_size
>     
>     This will be used to split 8-byte access down to two four-byte accesses.
>     
>     Reviewed-by: Richard Henderson <address@hidden>
>     Signed-off-by: Paolo Bonzini <address@hidden>
>
>
> If I hack the above funniness in my USB EHCI driver, somewhere down the
> qemu crashes at code introduced by this patch:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0000000000000000 in ?? ()
> (gdb) bt
> #0 0x0000000000000000 in ?? ()
> #1 0x00005555557a0ea4 in access_with_adjusted_size (address@hidden, 
> address@hidden, address@hidden, access_size_min=<optimized out>, 
> access_size_max=<optimized out>,
> access=0x5555557a1f80 <memory_region_oldmmio_write_accessor>, 
> opaque=0x5555567f8ab8) at /home/nikunj/work/power/code/qemu/memory.c:396
> #2 0x00005555557a5ebb in memory_region_dispatch_write (size=1, data=0, 
> addr=12, mr=0x5555567f8ab8) at /home/nikunj/work/power/code/qemu/memory.c:998
>
> Reverting this, I can safely boot using a usb-storage device put on ehci 
> controller.

Just reverting this patch does not help though, i will need to figure
which all commits are bad.

Regards
Nikunj