[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>

3 files changed, 5 insertions, 2 deletions

diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index b26b36109d54..216623eece35 100644
--- a/arch/arm/mm/ioremap.c
+++ b/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;
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
index 66f8612c5e5b..7647c597fc59 100644
--- a/arch/arm/mm/mm.h
+++ b/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;
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c
index 6cb80b4973d2..360405515bbd 100644
--- a/arch/arm/mm/mmu.c
+++ b/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);
 }