[ARM] mm 6: allow mem_types table to specify extended pte attributes

Add prot_pte_ext to the mem_types table to allow the extended pte
attributes to be passed to set_pte_ext(), thereby permitting us to
specify memory type information for the hardware PTE entries.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/ioremap.c

@@ -55,7 +55,8 @@ static int remap_area_pte(pmd_t *pmd, unsigned long addr, unsigned long end,
 		if (!pte_none(*pte))
 			goto bad;
 
-		set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot), 0);
+		set_pte_ext(pte, pfn_pte(phys_addr >> PAGE_SHIFT, prot),
+			    type->prot_pte_ext);
 		phys_addr += PAGE_SIZE;
 	} while (pte++, addr += PAGE_SIZE, addr != end);
 	return 0;

arch/arm/mm/mm.h

@@ -18,6 +18,7 @@ static inline pmd_t *pmd_off_k(unsigned long virt)
 
 struct mem_type {
 	unsigned int prot_pte;
+	unsigned int prot_pte_ext;
 	unsigned int prot_l1;
 	unsigned int prot_sect;
 	unsigned int domain;

arch/arm/mm/mmu.c

@@ -391,7 +391,8 @@ static void __init alloc_init_pte(pmd_t *pmd, unsigned long addr,
 
 	pte = pte_offset_kernel(pmd, addr);
 	do {
-		set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)), 0);
+		set_pte_ext(pte, pfn_pte(pfn, __pgprot(type->prot_pte)),
+			    type->prot_pte_ext);
 		pfn++;
 	} while (pte++, addr += PAGE_SIZE, addr != end);
 }