[Skiboot] [PATCH skiboot] cpufeatures: Always advertise POWER8NVL as DD2

Stewart Smith stewart at linux.ibm.com
Mon Feb 11 17:51:16 AEDT 2019

Alexey Kardashevskiy <aik at ozlabs.ru> writes:
> Despite the major version of PVR being 1 (0x004c0100) for POWER8NVL,
> these chips are functionally equalent to P8/P8E DD2 levels.
> This advertises POWER8NVL as DD2. As the result, skiboot adds
> ibm,powerpc-cpu-features/processor-control-facility for such CPUs and
> the linux kernel can use hypervisor doorbell messages to wake secondary
> threads; otherwise "KVM: CPU %d seems to be stuck" would appear because
> of missing LPCR_PECEDH.
> Fixes: 7f4c8e8ce0b "dt: add /cpus/ibm, powerpc-cpu-features device tree bindings"
> Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
> ---
> This was tested on top of reverted bd9839684d482417e8c60449592f4 as
> it breaks the POWER8NVL (garrison) machines:
> https://github.com/open-power/skiboot/issues/217

Thanks for this. I've merged to master as of
17975a6e645768c4651199055052a13858db6506 and also back into 6.0.x and
the (newly created) 6.2.x as of 84baad3ee52fc287f0bf6df5c5ebfbd3b5f59aa8
and 64627c85e648991b7a53a1de47d7d602194f80e1 respectively.

Stewart Smith
OPAL Architect, IBM.

More information about the Skiboot mailing list