powerpc/mm: Move WIMG update to helper.

Only difference here is, we apply the WIMG mapping early, so rflags
passed to updatepp will also be changed.

Acked-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/mm/hash64_4k.c

@@ -54,11 +54,6 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
 	 * need to add in 0x1 if it's a read-only user page
 	 */
 	rflags = htab_convert_pte_flags(new_pte);
-	/*
-	 * Add in WIMG bits
-	 */
-	rflags |= (new_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
-				_PAGE_COHERENT | _PAGE_GUARDED));
 
 	if (!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
 	    !cpu_has_feature(CPU_FTR_COHERENT_ICACHE))

arch/powerpc/mm/hash64_64k.c

@@ -86,11 +86,6 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
 	 */
 	subpg_pte = new_pte & ~subpg_prot;
 	rflags = htab_convert_pte_flags(subpg_pte);
-	/*
-	 * Add in WIMG bits
-	 */
-	rflags |= (subpg_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
-				_PAGE_COHERENT | _PAGE_GUARDED));
 
 	if (!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
 	    !cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) {
@@ -258,11 +253,6 @@ int __hash_page_64K(unsigned long ea, unsigned long access,
 					  old_pte, new_pte));
 
 	rflags = htab_convert_pte_flags(new_pte);
-	/*
-	 * Add in WIMG bits
-	 */
-	rflags |= (new_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
-				_PAGE_COHERENT | _PAGE_GUARDED));
 
 	if (!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
 	    !cpu_has_feature(CPU_FTR_COHERENT_ICACHE))

arch/powerpc/mm/hash_utils_64.c

@@ -182,7 +182,18 @@ unsigned long htab_convert_pte_flags(unsigned long pteflags)
 	/*
 	 * Always add "C" bit for perf. Memory coherence is always enabled
 	 */
-	return rflags | HPTE_R_C | HPTE_R_M;
+	rflags |=  HPTE_R_C | HPTE_R_M;
+	/*
+	 * Add in WIG bits
+	 */
+	if (pteflags & _PAGE_WRITETHRU)
+		rflags |= HPTE_R_W;
+	if (pteflags & _PAGE_NO_CACHE)
+		rflags |= HPTE_R_I;
+	if (pteflags & _PAGE_GUARDED)
+		rflags |= HPTE_R_G;
+
+	return rflags;
 }
 
 int htab_bolt_mapping(unsigned long vstart, unsigned long vend,

arch/powerpc/mm/hugepage-hash64.c

@@ -120,13 +120,6 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
 		pa = pmd_pfn(__pmd(old_pmd)) << PAGE_SHIFT;
 		new_pmd |= _PAGE_HASHPTE;
 
-		/* Add in WIMG bits */
-		rflags |= (new_pmd & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
-				      _PAGE_GUARDED));
-		/*
-		 * enable the memory coherence always
-		 */
-		rflags |= HPTE_R_M;
 repeat:
 		hpte_group = ((hash & htab_hash_mask) * HPTES_PER_GROUP) & ~0x7UL;
 

arch/powerpc/mm/hugetlbpage-hash64.c

@@ -91,14 +91,6 @@ int __hash_page_huge(unsigned long ea, unsigned long access, unsigned long vsid,
 		/* clear HPTE slot informations in new PTE */
 		new_pte = (new_pte & ~_PAGE_HPTEFLAGS) | _PAGE_HASHPTE;
 
-		/* Add in WIMG bits */
-		rflags |= (new_pte & (_PAGE_WRITETHRU | _PAGE_NO_CACHE |
-				      _PAGE_COHERENT | _PAGE_GUARDED));
-		/*
-		 * enable the memory coherence always
-		 */
-		rflags |= HPTE_R_M;
-
 		slot = hpte_insert_repeating(hash, vpn, pa, rflags, 0,
 					     mmu_psize, ssize);