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From: Michael Ellerman <mpe@ellerman.id.au>
To: Jeremy Kerr <jk@ozlabs.org>, Sombat Tragolgosol <sombat3960@gmail.com>,
 Linuxppc-dev@lists.ozlabs.org
Cc: geoff@infradead.org
Subject: Re: SPU not working for kernel 4.9, 4.10, 4.11a and 4.12
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Date: Wed, 24 May 2017 10:58:35 +1000
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Jeremy Kerr <jk@ozlabs.org> writes:

> Hi all,
>
>
>> Looks like this also happens with the simple spu_run test:
>> 
>>  https://github.com/jk-ozlabs/spufs-testsuite/blob/master/tests/03-spu_run/01-spu_run.c
>> 
>> ... might need some debugging here, I'll update if I find anything.
>
> And it appears we're stuck in the POLL_WHILE_FALSE() loop in
> wait_tag_complete() called from restore_lscsa().
>
> Because spufs itself has been fairly static, I suspect some other change
> has meant that MFC DMAs aren't working; so at this point, a bisect might
> be the best way forward. Do you see the exact same behaviour on 4.9 (but
> 4.8 works?)

I can bisect it here, I have everything setup to autoboot etc.

cheers