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Re: [RFC PATCH 0/5] ppc/Pegasos2 VOF

From: BALATON Zoltan
Subject: Re: [RFC PATCH 0/5] ppc/Pegasos2 VOF
Date: Thu, 10 Jun 2021 12:04:59 +0200 (CEST)

On Thu, 10 Jun 2021, David Gibson wrote:

On Thu, Jun 10, 2021 at 05:14:45PM +1000, Alexey Kardashevskiy wrote:

On 6/9/21 20:28, BALATON Zoltan wrote:
On Wed, 9 Jun 2021, Alexey Kardashevskiy wrote:
On 6/7/21 01:46, BALATON Zoltan wrote:
Based-on: <20210520090557.435689-1-aik@ozlabs.ru>
^ That is v20 of Alexey's VOF patch


Posting these for early review now. I plan to rebase on the next VOF
patch that hopefully fixes those points that I had to circumvent in
patch 1 for now. I've reported these before but now all of those that
are needed for pegasos2 are in one place. Other points I've reported
could be clean ups but not sttictly needed.

With this series on top of VOF v20 I can now boot Linux and MorphOS on
pegasos2 without needing a firmware blob so I hope this is enough to
get this board in 6.1 and also have it enabled so users can start
using it. That means that VOF will also be merged by then. This now
gives VOF another use case that may help it getting finished.

I've also updated my development tree with this series here:


Please review so I can do any needed changes together with the rebase
on next VOF patch so we don't miss 6.1 this time.

It would help if you provided the disk or/and kernel or/and
initramdisk images and the example command line to give this a try.
And said a few words who is this Pegasos2 guy :) The series looks ok
to me otherwise. Thanks,

These were in the original series adding this board:


Ah ok. Thanks!

For testing I've used the kernel from debian 8.11.0 powerpc iso which is
known to work on real hardware and MorphOS demo iso available from
www.morphos-team.net. For debian look into install/pegasos to find the
right vmlinuz-chrp.initrd kernel, for MorphOS use the boot.img from root
of the iso as -kernel.

What's still missing is some rtas functions like get-time-of-day. Are
these any kind of standard and is there a doc about their parameters and
returns or I'll heave to find out from kernel sources? I plan to add
these later but not needed to get it boot.

pseries guests use what the LoPAPR spec (derived from sPAPR - "server PAPR")


Of course pegasos won't remotely be PAPR, but you could look at how
the RTAS functions are defined there.

I'm not really sure of the origins of RTAS.  It's not in plain
IEEE1275 (the original OF spec), but the fact pegasos uses it suggests
it's not purely a PAPR thing, either.

Pegasos is supposed to be a CHRP platform so maybe there's something on it in that doc, I haven't checked yet but now you mentioned these I should probably look there.


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