[Skiboot] [PATCH] asm/head: Loop after attn
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
OPAL Architect, IBM.
More information about the Skiboot