[Skiboot] [PATCH v9 00/30] little endian skiboot
npiggin at gmail.com
Sun Dec 8 22:30:37 AEDT 2019
Frederic Barrat's on December 6, 2019 4:30 am:
> Le 29/11/2019 à 07:18, Nicholas Piggin a écrit :
>> A few reasons for this:
>> - The rest of the software is moving (moved) to LE. BE is still
>> supported, but the fact is LE will be better tested from now on in
>> terms of toolchain.
>> - ELFv2 ABI is a smaller image, nicer asm code. We can use ELFv2 with BE
>> but toolchain won't officially support or test it.
>> - Some levels of OpenPOWER ISA allow a conforming implementation to
>> implement LE only.
>> - Less stack usage of ELFv2 facilitates OPAL call convention that uses
>> the host kernel stack (which is a whole different story but has
>> - Common endian with the host kernel can help with debugging skiboot
>> with host kernel facilities (like BUG, xmon). We could achieve the
>> same by teaching kernel about different endianness, but it's more work.
>> Notably missing from conversion:
>> - PHB3
>> - NPU and CAPI code
> Hi Nick,
> I did a quick pass on the opal calls for opencapi and capi2, and you've
> already fixed the one call which needed it (patch 4).
> I ran some sniff tests for opencapi and capi2 and it was working well.
Great thanks for looking over the code and testing, that's very helpful.
I'll update the cover letter.
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