[PATCH 6/6] powerpc/pseries: Add firmware details to dump stack arch description

[Nathan Lynch]

Michael Ellerman <mpe at ellerman.id.au> writes:

> Add firmware version details to the dump stack arch description, which
> is printed in case of an oops.
>
> Currently /hypervisor only exists on KVM, so if we don't find that
> look for something that suggests we're on phyp and if so that's
> probably a good guess. The actual content of the ibm,fw-net-version
> seems to be a full path so is too long to add to the description.

My only reservation is that ibm,fw-net-version seems to be unspecified
and could disappear in future firmware versions.

/ibm,powervm-partition would be the best PAPR-specified property for
this purpose, but I don't see it on a P8/860 partition I checked,
unfortunately. I do see it on a P9. Presumably it's present in device
trees on PowerVM P9 systems and later, but it's probably too new to use
for this.

/ibm,lpar-capable "indicates that the platform is capable of supporting
logical partitioning and is only present on such systems." This one is
present on the P8.

So consider this a weak suggestion to replace the ibm,fw-net-version
check with ibm,lpar-capable. But I don't want to bikeshed it, overall
the series looks good.

>
> eg: Hardware name: ... of:'IBM,FW860.42 (SV860_138)' hv:phyp

Will this info get printed during boot as well? There are many times it
would have been useful to me when looking at logs from non-oopsed
kernels.