[PATCH v2 3/9] powerpc/powernv: Remove real mode access limit for early allocations

[Benjamin Herrenschmidt]

On Tue, 2017-09-12 at 15:43 +0530, Aneesh Kumar K.V wrote:
> Yes. I added the limit to radix after I observed that we have MSR[SF] =
> 0.
> 
> IIRC it was PACA access that was causing it to crash on return from RTAS.
> 
> hmm the commit also explains that.
> 
> powerpc/mm/radix: Limit paca allocation in radix
> 
> On return from RTAS we access the paca variables and we have 64 bit
> disabled. This requires us to limit paca in 32 bit range.
> 
> Fix this by setting ppc64_rma_size to first_memblock_size/1G range.

That should be fixable with better use of temporaries...

Ben.