Aneesh Kumar K.V 4ffe713b75 powerpc/mm: Increase the max addressable memory to 2PB ... Currently we limit the max addressable memory to 128TB. This patch increase the limit to 2PB. We can have devices like nvdimm which adds memory above 512TB limit. We still don't support regular system ram above 512TB. One of the challenge with that is the percpu allocator, that allocates per node memory and use the max distance between them as the percpu offsets. This means with large gap in address space ( system ram above 1PB) we will run out of vmalloc space to map the percpu allocation. In order to support addressable memory above 512TB, kernel should be able to linear map this range. To do that with hash translation we now add 4 context to kernel linear map region. Our per context addressable range is 512TB. We still keep VMALLOC and VMEMMAP region to old size. SLB miss handlers is updated to validate these limit. We also limit this update to SPARSEMEM_VMEMMAP and SPARSEMEM_EXTREME Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-10-14 18:04:09 +11:00
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asm	powerpc/mm: Increase the max addressable memory to 2PB	2018-10-14 18:04:09 +11:00
uapi/asm	powerpc: Split user/kernel definitions of struct pt_regs	2018-10-14 18:04:09 +11:00