From nacc at linux.vnet.ibm.com  Fri May 22 11:54:47 2015
From: nacc at linux.vnet.ibm.com (Nishanth Aravamudan)
Date: Thu, 21 May 2015 18:54:47 -0700
Subject: Directed yaboot netboot?
Message-ID: <20150522015447.GB45079@linux.vnet.ibm.com>

Hello,

So on PowerVM LPARs, there's a hidden (in OpenFirmware) setting for the
filename to use to netboot an LPAR. I'm using this to allow my
bootserver to specify the bootloader binary as a hardlink to either the
grub2 core.elf or the yaboot binary depending on the OS I'm trying to
install.

But it seems that yaboot, unless we actually use BOOTP, does not
understand that it's being netbooted (I think prom_get_netinfo() is
coming back empty) and so ends up trying to load /etc/yaboot.conf (and I
need it to load /etc/01-<mac> like it would for a normal BOOTP boot).
And if we specify this hidden filename in OF, no BOOTP occurs (so it's a
lot faster/more reliable).

Is there any way to make this work?

-Nish