[Skiboot] [RFC PATCH 0/4] Add support for SPIRA-H

[Ananth N Mavinakayanahalli]

On Mon, Feb 15, 2016 at 01:30:21PM +1030, Joel Stanley wrote:
> On Sat, Feb 13, 2016 at 2:08 AM, Vasant Hegde
> <hegdevasant at linux.vnet.ibm.com> wrote:
> > In latest firwmare the SPIRA is split into two portions, a hypervisor
> > initialized and managed portion and a service processor (FSP) built portion,
> > to accommodate secure boot. The hypervisor portion will be referred to as
> > the SPIRA-H and the FSP portion referred to as the SPIRA-S.
> 
> What is SPIRA?

Service Processor Interface Root Array -- defines the interface between
the service processor and the hypervisor/firmware. Its the basic data
format from which the device tree is built on traditional FSP based
systems. SPIRA has various incarnations and OPAL thus far, has used the
legacy SPIRA. We need to transition to using SPIRA-H for various reasons
-- future systems and trusted boot to name a few.

Ananth