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

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.