[Skiboot] [PATCH] hw/phb4: Prevent register accesses when in reset

Oliver O'Halloran oohall at gmail.com
Thu Aug 8 16:59:26 AEST 2019

On Thu, Aug 8, 2019 at 4:54 PM Vasant Hegde
<hegdevasant at linux.vnet.ibm.com> wrote:
> On 08/02/2019 01:30 PM, Oliver O'Halloran wrote:
> > While the the ETU is in reset we cannot access any of the PHB registers.
> > If a PHB register is accessed via the XSCOM indirect interface then
> > we'll cause an ETU reset error which may prevent the PHB from being
> > re-initialised once the reset is lifted.
> >
> > Prevent register accesses while in reset by adding a flag that is set
> > while the ETU reset bit is high and checking that flag in the XSCOM
> > (ASB) backdoor register access path.
> Candidate for #stable ?

Yeah, it's being held in the skiboot-stable moderation queue while I
try and find out how to access that.

Also, do you want me to make you list moderator for skiboot-stable?

> -Vasant

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