diff --git a/arch/arm/include/asm/pgtable-3level-hwdef.h b/arch/arm/include/asm/pgtable-3level-hwdef.h
index 626989fec4d334ef8c01f707f87de6a25c1d8a8e..9fd61c72a33a1417704881274239e2fd29053cce 100644
--- a/arch/arm/include/asm/pgtable-3level-hwdef.h
+++ b/arch/arm/include/asm/pgtable-3level-hwdef.h
@@ -43,7 +43,7 @@
#define PMD_SECT_BUFFERABLE (_AT(pmdval_t, 1) << 2)
#define PMD_SECT_CACHEABLE (_AT(pmdval_t, 1) << 3)
#define PMD_SECT_USER (_AT(pmdval_t, 1) << 6) /* AP[1] */
-#define PMD_SECT_RDONLY (_AT(pmdval_t, 1) << 7) /* AP[2] */
+#define PMD_SECT_AP2 (_AT(pmdval_t, 1) << 7) /* read only */
#define PMD_SECT_S (_AT(pmdval_t, 3) << 8)
#define PMD_SECT_AF (_AT(pmdval_t, 1) << 10)
#define PMD_SECT_nG (_AT(pmdval_t, 1) << 11)
@@ -72,6 +72,7 @@
#define PTE_TABLE_BIT (_AT(pteval_t, 1) << 1)
#define PTE_BUFFERABLE (_AT(pteval_t, 1) << 2) /* AttrIndx[0] */
#define PTE_CACHEABLE (_AT(pteval_t, 1) << 3) /* AttrIndx[1] */
+#define PTE_AP2 (_AT(pteval_t, 1) << 7) /* AP[2] */
#define PTE_EXT_SHARED (_AT(pteval_t, 3) << 8) /* SH[1:0], inner shareable */
#define PTE_EXT_AF (_AT(pteval_t, 1) << 10) /* Access Flag */
#define PTE_EXT_NG (_AT(pteval_t, 1) << 11) /* nG */
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 34f371c4bbb224d40ae1dfa4ac0937609b524353..06e0bc0f8b00b2c7f9fe9f6dac97c81b00b803bb 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -79,18 +79,19 @@
#define L_PTE_PRESENT (_AT(pteval_t, 3) << 0) /* Present */
#define L_PTE_FILE (_AT(pteval_t, 1) << 2) /* only when !PRESENT */
#define L_PTE_USER (_AT(pteval_t, 1) << 6) /* AP[1] */
-#define L_PTE_RDONLY (_AT(pteval_t, 1) << 7) /* AP[2] */
#define L_PTE_SHARED (_AT(pteval_t, 3) << 8) /* SH[1:0], inner shareable */
#define L_PTE_YOUNG (_AT(pteval_t, 1) << 10) /* AF */
#define L_PTE_XN (_AT(pteval_t, 1) << 54) /* XN */
-#define L_PTE_DIRTY (_AT(pteval_t, 1) << 55) /* unused */
-#define L_PTE_SPECIAL (_AT(pteval_t, 1) << 56) /* unused */
+#define L_PTE_DIRTY (_AT(pteval_t, 1) << 55)
+#define L_PTE_SPECIAL (_AT(pteval_t, 1) << 56)
#define L_PTE_NONE (_AT(pteval_t, 1) << 57) /* PROT_NONE */
+#define L_PTE_RDONLY (_AT(pteval_t, 1) << 58) /* READ ONLY */
-#define PMD_SECT_VALID (_AT(pmdval_t, 1) << 0)
-#define PMD_SECT_DIRTY (_AT(pmdval_t, 1) << 55)
-#define PMD_SECT_SPLITTING (_AT(pmdval_t, 1) << 56)
-#define PMD_SECT_NONE (_AT(pmdval_t, 1) << 57)
+#define L_PMD_SECT_VALID (_AT(pmdval_t, 1) << 0)
+#define L_PMD_SECT_DIRTY (_AT(pmdval_t, 1) << 55)
+#define L_PMD_SECT_SPLITTING (_AT(pmdval_t, 1) << 56)
+#define L_PMD_SECT_NONE (_AT(pmdval_t, 1) << 57)
+#define L_PMD_SECT_RDONLY (_AT(pteval_t, 1) << 58)
/*
* To be used in assembly code with the upper page attributes.
@@ -214,24 +215,25 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr)
#define pmd_young(pmd) (pmd_isset((pmd), PMD_SECT_AF))
#define __HAVE_ARCH_PMD_WRITE
-#define pmd_write(pmd) (pmd_isclear((pmd), PMD_SECT_RDONLY))
+#define pmd_write(pmd) (pmd_isclear((pmd), L_PMD_SECT_RDONLY))
+#define pmd_dirty(pmd) (pmd_isset((pmd), L_PMD_SECT_DIRTY))
#define pmd_hugewillfault(pmd) (!pmd_young(pmd) || !pmd_write(pmd))
#define pmd_thp_or_huge(pmd) (pmd_huge(pmd) || pmd_trans_huge(pmd))
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define pmd_trans_huge(pmd) (pmd_val(pmd) && !pmd_table(pmd))
-#define pmd_trans_splitting(pmd) (pmd_isset((pmd), PMD_SECT_SPLITTING))
+#define pmd_trans_splitting(pmd) (pmd_isset((pmd), L_PMD_SECT_SPLITTING))
#endif
#define PMD_BIT_FUNC(fn,op) \
static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; }
-PMD_BIT_FUNC(wrprotect, |= PMD_SECT_RDONLY);
+PMD_BIT_FUNC(wrprotect, |= L_PMD_SECT_RDONLY);
PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF);
-PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING);
-PMD_BIT_FUNC(mkwrite, &= ~PMD_SECT_RDONLY);
-PMD_BIT_FUNC(mkdirty, |= PMD_SECT_DIRTY);
+PMD_BIT_FUNC(mksplitting, |= L_PMD_SECT_SPLITTING);
+PMD_BIT_FUNC(mkwrite, &= ~L_PMD_SECT_RDONLY);
+PMD_BIT_FUNC(mkdirty, |= L_PMD_SECT_DIRTY);
PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF);
#define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT))
@@ -245,8 +247,8 @@ PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF);
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
- const pmdval_t mask = PMD_SECT_USER | PMD_SECT_XN | PMD_SECT_RDONLY |
- PMD_SECT_VALID | PMD_SECT_NONE;
+ const pmdval_t mask = PMD_SECT_USER | PMD_SECT_XN | L_PMD_SECT_RDONLY |
+ L_PMD_SECT_VALID | L_PMD_SECT_NONE;
pmd_val(pmd) = (pmd_val(pmd) & ~mask) | (pgprot_val(newprot) & mask);
return pmd;
}
@@ -257,8 +259,13 @@ static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
BUG_ON(addr >= TASK_SIZE);
/* create a faulting entry if PROT_NONE protected */
- if (pmd_val(pmd) & PMD_SECT_NONE)
- pmd_val(pmd) &= ~PMD_SECT_VALID;
+ if (pmd_val(pmd) & L_PMD_SECT_NONE)
+ pmd_val(pmd) &= ~L_PMD_SECT_VALID;
+
+ if (pmd_write(pmd) && pmd_dirty(pmd))
+ pmd_val(pmd) &= ~PMD_SECT_AP2;
+ else
+ pmd_val(pmd) |= PMD_SECT_AP2;
*pmdp = __pmd(pmd_val(pmd) | PMD_SECT_nG);
flush_pmd_entry(pmdp);
diff --git a/arch/arm/mm/dump.c b/arch/arm/mm/dump.c
index c508f41a43bcb9f2f97c9d4afaf131ef77b4dc44..59424937e52b8839c4fb4504aedbc93584b4304e 100644
--- a/arch/arm/mm/dump.c
+++ b/arch/arm/mm/dump.c
@@ -126,8 +126,8 @@ static const struct prot_bits section_bits[] = {
.val = PMD_SECT_USER,
.set = "USR",
}, {
- .mask = PMD_SECT_RDONLY,
- .val = PMD_SECT_RDONLY,
+ .mask = L_PMD_SECT_RDONLY,
+ .val = L_PMD_SECT_RDONLY,
.set = "ro",
.clear = "RW",
#elif __LINUX_ARM_ARCH__ >= 6
diff --git a/arch/arm/mm/proc-v7-3level.S b/arch/arm/mm/proc-v7-3level.S
index 564f4b934ceb96fac160b36305fc8e501fd0a71d..e4c8acfc13236549146a98ba14de0576fcc00818 100644
--- a/arch/arm/mm/proc-v7-3level.S
+++ b/arch/arm/mm/proc-v7-3level.S
@@ -87,8 +87,13 @@ ENTRY(cpu_v7_set_pte_ext)
tst rh, #1 << (57 - 32) @ L_PTE_NONE
bicne rl, #L_PTE_VALID
bne 1f
- tst rh, #1 << (55 - 32) @ L_PTE_DIRTY
- orreq rl, #L_PTE_RDONLY
+
+ eor ip, rh, #1 << (55 - 32) @ toggle L_PTE_DIRTY in temp reg to
+ @ test for !L_PTE_DIRTY || L_PTE_RDONLY
+ tst ip, #1 << (55 - 32) | 1 << (58 - 32)
+ orrne rl, #PTE_AP2
+ biceq rl, #PTE_AP2
+
1: strd r2, r3, [r0]
ALT_SMP(W(nop))
ALT_UP (mcr p15, 0, r0, c7, c10, 1) @ flush_pte