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target-ppc: Correct page size decoding in ppc_hash64_pteg_search()
The architecture specifies that when searching a PTEG for PTEs, entries with a page size encoding that's not valid for the current segment should be ignored, continuing the search. The current implementation does this with ppc_hash64_pte_size_decode() which is a very incomplete implementation of this check. We already have code to do a full and correct page size decode in hpte_page_shift(). This patch moves hpte_page_shift() so it can be used in ppc_hash64_pteg_search() and adjusts the latter's parameters to include a full SLBE instead of just a segment page shift. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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