[Skiboot] [PATCH v2 5/5] occ : Add OPAL API opal_get_dynamic_update() to support runtime update

Stewart Smith stewart at linux.vnet.ibm.com
Thu Jun 9 17:22:39 AEST 2016

Shilpasri G Bhat <shilpa.bhat at linux.vnet.ibm.com> writes:
> This patch adds a generic opal call to retrieve runtime updated
> information. One such data is pstate table. OCC can provide new
> frequencies to the host which needs to be parsed and passed to
> linux for cpufreq to consume it. This call can be extended to
> support retrieval of frequency throttle stats later in the future.

Why can't we handle these updates as simple runtime device tree updates?

We also need a way to notify the host that changes have occured, right?

Could we use this same infrastructure to (for p9 timeframe) not wait for
OCC to start during boot, instead allowing us to start booting linux
while the OCCs finish starting up?

Stewart Smith
OPAL Architect, IBM.

More information about the Skiboot mailing list