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powerpc/mm/radix: Update Radix tree size as per ISA 3.0

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ISA 3.0 updated it to be encoded as Radix tree size = 2^(RTS + 31). We
have it encoded as 2^(RTS + 28). Add a helper with the correct encoding
and use it instead of opencoding.

Fixes: 2bfd65e45e ("powerpc/mm/radix: Add radix callbacks for early init routines")
Reviewed-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V
2016-06-17 11:40:36 +05:30
committed by Michael Ellerman
parent e568006b9d
commit b23d9c5b9c
3 changed files with 19 additions and 7 deletions
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2
arch/powerpc/mm/mmu_context_book3s64.c
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@@ -65,7 +65,7 @@ static int radix__init_new_context(struct mm_struct *mm, int index)
/*
* set the process table entry,
*/
rts_field = 3ull << PPC_BITLSHIFT(2);
rts_field = radix__get_tree_size();
process_tb[index].prtb0 = cpu_to_be64(rts_field | __pa(mm->pgd) | RADIX_PGD_INDEX_SIZE);
return 0;
}