Re: qemu/powernv: coreboot support?

[Cédric Le Goater]

On 19/10/2019 17:31, Marty E. Plummer wrote:
> On Sat, Oct 19, 2019 at 03:46:59PM +0200, Cédric Le Goater wrote:
>> On 18/10/2019 19:28, Marty E. Plummer wrote:
>>> Hello,
>>>
>>> First off, thank you for the work you've done on the ppc64 support, it
>>> has been very useful. I'm currently working on a coreboot port for the
>>> talos ii line of systems (which means more ppc64 support, support
>>> specifically for the power9 sforza chip, and specific mainboard support.
>>> My plate is very full lol) and have been using qemu to debug the
>>> bootblock.
>>>
>>> It has been very useful for that, but I'm now at the point where I need
>>> to jump to romstage, and that's where it gets tricky. qemu parses the rom
>>> image and looks for a ffs header, locates skiboot on it, and jumps straight
>>> to that. Not exactly ideal for debugging something not produced from 
>>> op-build.
>>
>> yes. I suppose you are using my branch powernv-4.2 which adds PNOR support
>> and a way to boot directly from PNOR. In that case, QEMU parses the PNOR
>> file to extract the PAYLOAD partition (skiboot). skiboot also detects the
>> flash and extract the kernel and initramfs from the PNOR.
>>
>> However, you can bypass all this internal boot process by simply passing
>> a -bios option and not passing a MTD device.
>>
> Doing so gives me the following error:
> qemu-system-ppc64: Could not load OPAL firmware 'build/coreboot.rom'
> (this is after I patched the 4mb size limit up)

Could you make that rom available ? 

Thanks,

C.