Re: [PATCH qemu] spapr: Force 32bit when resetting a core

[Mark Cave-Ayland]

On 14/01/2022 14:12, Cédric Le Goater wrote:

> Yes, more info here :
>
> https://patchwork.kernel.org/project/qemu-devel/patch/1458121432-2855-1-git-send-email-lvivier@redhat.com/ 
>
> mac99+970 only boots with a 64bit kernel. 32bit are not supported because
> of the use of the rfi instruction which was removed in v2.01. 32bit user
> space is supported though.
>
> However I was not able to build a disk with a compatible boot partition
> for OpenBIOS. The above support only applies for kernel loaded in memory.
> May be Mark knows how to do this ?

The Mac machines generally require a HFS filesystem for booting with OpenBIOS: it's a 
bit convoluted, but some instructions for grub can be found at 
https://wiki.gentoo.org/wiki/GRUB_on_Open_Firmware_(PowerPC).

I can certainly help out if you get stuck. If this is a more obscure combination then 
is it worth adding a tiny image for use with avocado?


ATB,

Mark.