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

[Paolo Bonzini]

Il 19/07/2013 14:58, Alexey Kardashevskiy ha scritto:
> On 07/19/2013 10:50 PM, Paolo Bonzini wrote:
>> Il 14/06/2013 12:32, Nikunj A Dadhania ha scritto:
>>> 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.
>>
>> Hi Nikunj,
>>
>> can you try the attached patch?
>>
>> Alexey, with some luck it may even fix virtio-blk too.
> 
> 
> Heh. Bad luck. The behaviour has changed slightly but it still does not work.

How changed?

Paolo