[Skiboot] [PATCH skiboot] hw/phb3/naples: Disable D-states

[Stewart Smith]

Alexey Kardashevskiy <aik at ozlabs.ru> writes:
> Putting "Mellanox Technologies MT27700 Family [ConnectX-4] [15b3:1013]"
> (more precisely, the second of 2 its PCI functions, no matter in what
> order) into the D3 state causes EEH with the "PCT timeout" error.
> This has been noticed on garrison machines only and firestones do not
> seem to have this issue.
>
> This disables D-states changing for devices on root buses on Naples by
> installing a config space access filter (copied from PHB4).
>
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
> ---
>  hw/phb3.c | 29 +++++++++++++++++++++++++++++
>  1 file changed, 29 insertions(+)

Merged to master as of 4824d17bb53b89cf599ccdbde2a7a77f424cd3bb and
bringing it back into 6.2.x and 6.0.x now.

-- 
Stewart Smith
OPAL Architect, IBM.