[Skiboot] [PATCH] asm/head: Loop after attn

Stewart Smith stewart at linux.vnet.ibm.com
Fri Nov 10 15:41:03 AEDT 2017

Oliver O'Halloran <oohall at gmail.com> writes:
> We use the attn instruction to raise an error in early boot if OPAL
> don't recognise the PVR. It's possible for hostboot to disable the
> attn instruction before entering OPAL so add an extra busy loop after
> the attn to prevent attempting to boot on an unknown processor.
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>
> ---
>  asm/head.S | 1 +
>  1 file changed, 1 insertion(+)

Makes sense. Merged to master as of 370b8866871b5c2cf3286afbf19fc90282cb3508
Stewart Smith
OPAL Architect, IBM.

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