powerpc/mm: Move book3s64 specifics in subdirectory mm/book3s64

Many files in arch/powerpc/mm are only for book3S64. This patch
creates a subdirectory for them.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[mpe: Update the selftest sym links, shorten new filenames, cleanup some
      whitespace and formatting in the new files.]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 0 insertions, 124 deletions

diff --git a/arch/powerpc/mm/hash64_4k.c b/arch/powerpc/mm/hash64_4k.c
deleted file mode 100644
index 6fa6765a10eb..000000000000
--- a/arch/powerpc/mm/hash64_4k.c
+++ /dev/null
@@ -1,124 +0,0 @@
-/*
- * Copyright IBM Corporation, 2015
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- */
-
-#include <linux/mm.h>
-#include <asm/machdep.h>
-#include <asm/mmu.h>
-
-int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
-		   pte_t *ptep, unsigned long trap, unsigned long flags,
-		   int ssize, int subpg_prot)
-{
-	real_pte_t rpte;
-	unsigned long hpte_group;
-	unsigned long rflags, pa;
-	unsigned long old_pte, new_pte;
-	unsigned long vpn, hash, slot;
-	unsigned long shift = mmu_psize_defs[MMU_PAGE_4K].shift;
-
-	/*
-	 * atomically mark the linux large page PTE busy and dirty
-	 */
-	do {
-		pte_t pte = READ_ONCE(*ptep);
-
-		old_pte = pte_val(pte);
-		/* If PTE busy, retry the access */
-		if (unlikely(old_pte & H_PAGE_BUSY))
-			return 0;
-		/* If PTE permissions don't match, take page fault */
-		if (unlikely(!check_pte_access(access, old_pte)))
-			return 1;
-		/*
-		 * Try to lock the PTE, add ACCESSED and DIRTY if it was
-		 * a write access. Since this is 4K insert of 64K page size
-		 * also add H_PAGE_COMBO
-		 */
-		new_pte = old_pte | H_PAGE_BUSY | _PAGE_ACCESSED;
-		if (access & _PAGE_WRITE)
-			new_pte |= _PAGE_DIRTY;
-	} while (!pte_xchg(ptep, __pte(old_pte), __pte(new_pte)));
-
-	/*
-	 * PP bits. _PAGE_USER is already PP bit 0x2, so we only
-	 * need to add in 0x1 if it's a read-only user page
-	 */
-	rflags = htab_convert_pte_flags(new_pte);
-	rpte = __real_pte(__pte(old_pte), ptep, PTRS_PER_PTE);
-
-	if (cpu_has_feature(CPU_FTR_NOEXECUTE) &&
-	    !cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
-		rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap);
-
-	vpn  = hpt_vpn(ea, vsid, ssize);
-	if (unlikely(old_pte & H_PAGE_HASHPTE)) {
-		/*
-		 * There MIGHT be an HPTE for this pte
-		 */
-		unsigned long gslot = pte_get_hash_gslot(vpn, shift, ssize,
-							 rpte, 0);
-
-		if (mmu_hash_ops.hpte_updatepp(gslot, rflags, vpn, MMU_PAGE_4K,
-					       MMU_PAGE_4K, ssize, flags) == -1)
-			old_pte &= ~_PAGE_HPTEFLAGS;
-	}
-
-	if (likely(!(old_pte & H_PAGE_HASHPTE))) {
-
-		pa = pte_pfn(__pte(old_pte)) << PAGE_SHIFT;
-		hash = hpt_hash(vpn, shift, ssize);
-
-repeat:
-		hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;
-
-		/* Insert into the hash table, primary slot */
-		slot = mmu_hash_ops.hpte_insert(hpte_group, vpn, pa, rflags, 0,
-						MMU_PAGE_4K, MMU_PAGE_4K, ssize);
-		/*
-		 * Primary is full, try the secondary
-		 */
-		if (unlikely(slot == -1)) {
-			hpte_group = (~hash & htab_hash_mask) * HPTES_PER_GROUP;
-			slot = mmu_hash_ops.hpte_insert(hpte_group, vpn, pa,
-							rflags,
-							HPTE_V_SECONDARY,
-							MMU_PAGE_4K,
-							MMU_PAGE_4K, ssize);
-			if (slot == -1) {
-				if (mftb() & 0x1)
-					hpte_group = (hash & htab_hash_mask) *
-							HPTES_PER_GROUP;
-				mmu_hash_ops.hpte_remove(hpte_group);
-				/*
-				 * FIXME!! Should be try the group from which we removed ?
-				 */
-				goto repeat;
-			}
-		}
-		/*
-		 * Hypervisor failure. Restore old pte and return -1
-		 * similar to __hash_page_*
-		 */
-		if (unlikely(slot == -2)) {
-			*ptep = __pte(old_pte);
-			hash_failure_debug(ea, access, vsid, trap, ssize,
-					   MMU_PAGE_4K, MMU_PAGE_4K, old_pte);
-			return -1;
-		}
-		new_pte = (new_pte & ~_PAGE_HPTEFLAGS) | H_PAGE_HASHPTE;
-		new_pte |= pte_set_hidx(ptep, rpte, 0, slot, PTRS_PER_PTE);
-	}
-	*ptep = __pte(new_pte & ~H_PAGE_BUSY);
-	return 0;
-}