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Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
-rw-r--r--arch/s390/include/asm/pgtable.h111
1 files changed, 69 insertions, 42 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 0362cd5fa187..7ed1972b1920 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -200,6 +200,7 @@ static inline int is_module_addr(void *addr)
*/
/* Hardware bits in the page table entry */
+#define _PAGE_NOEXEC 0x100 /* HW no-execute bit */
#define _PAGE_PROTECT 0x200 /* HW read-only bit */
#define _PAGE_INVALID 0x400 /* HW invalid bit */
#define _PAGE_LARGE 0x800 /* Bit to mark a large pte */
@@ -277,6 +278,7 @@ static inline int is_module_addr(void *addr)
/* Bits in the region table entry */
#define _REGION_ENTRY_ORIGIN ~0xfffUL/* region/segment table origin */
#define _REGION_ENTRY_PROTECT 0x200 /* region protection bit */
+#define _REGION_ENTRY_NOEXEC 0x100 /* region no-execute bit */
#define _REGION_ENTRY_OFFSET 0xc0 /* region table offset */
#define _REGION_ENTRY_INVALID 0x20 /* invalid region table entry */
#define _REGION_ENTRY_TYPE_MASK 0x0c /* region/segment table type mask */
@@ -316,6 +318,7 @@ static inline int is_module_addr(void *addr)
#define _SEGMENT_ENTRY_ORIGIN_LARGE ~0xfffffUL /* large page address */
#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */
#define _SEGMENT_ENTRY_PROTECT 0x200 /* page protection bit */
+#define _SEGMENT_ENTRY_NOEXEC 0x100 /* region no-execute bit */
#define _SEGMENT_ENTRY_INVALID 0x20 /* invalid segment table entry */
#define _SEGMENT_ENTRY (0)
@@ -385,17 +388,23 @@ static inline int is_module_addr(void *addr)
* Page protection definitions.
*/
#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID | _PAGE_PROTECT)
-#define PAGE_READ __pgprot(_PAGE_PRESENT | _PAGE_READ | \
+#define PAGE_RO __pgprot(_PAGE_PRESENT | _PAGE_READ | \
+ _PAGE_NOEXEC | _PAGE_INVALID | _PAGE_PROTECT)
+#define PAGE_RX __pgprot(_PAGE_PRESENT | _PAGE_READ | \
_PAGE_INVALID | _PAGE_PROTECT)
-#define PAGE_WRITE __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
+#define PAGE_RW __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
+ _PAGE_NOEXEC | _PAGE_INVALID | _PAGE_PROTECT)
+#define PAGE_RWX __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
_PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
- _PAGE_YOUNG | _PAGE_DIRTY)
+ _PAGE_YOUNG | _PAGE_DIRTY | _PAGE_NOEXEC)
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
- _PAGE_YOUNG | _PAGE_DIRTY)
+ _PAGE_YOUNG | _PAGE_DIRTY | _PAGE_NOEXEC)
#define PAGE_KERNEL_RO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_YOUNG | \
- _PAGE_PROTECT)
+ _PAGE_PROTECT | _PAGE_NOEXEC)
+#define PAGE_KERNEL_EXEC __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
+ _PAGE_YOUNG | _PAGE_DIRTY)
/*
* On s390 the page table entry has an invalid bit and a read-only bit.
@@ -404,43 +413,51 @@ static inline int is_module_addr(void *addr)
*/
/*xwr*/
#define __P000 PAGE_NONE
-#define __P001 PAGE_READ
-#define __P010 PAGE_READ
-#define __P011 PAGE_READ
-#define __P100 PAGE_READ
-#define __P101 PAGE_READ
-#define __P110 PAGE_READ
-#define __P111 PAGE_READ
+#define __P001 PAGE_RO
+#define __P010 PAGE_RO
+#define __P011 PAGE_RO
+#define __P100 PAGE_RX
+#define __P101 PAGE_RX
+#define __P110 PAGE_RX
+#define __P111 PAGE_RX
#define __S000 PAGE_NONE
-#define __S001 PAGE_READ
-#define __S010 PAGE_WRITE
-#define __S011 PAGE_WRITE
-#define __S100 PAGE_READ
-#define __S101 PAGE_READ
-#define __S110 PAGE_WRITE
-#define __S111 PAGE_WRITE
+#define __S001 PAGE_RO
+#define __S010 PAGE_RW
+#define __S011 PAGE_RW
+#define __S100 PAGE_RX
+#define __S101 PAGE_RX
+#define __S110 PAGE_RWX
+#define __S111 PAGE_RWX
/*
* Segment entry (large page) protection definitions.
*/
#define SEGMENT_NONE __pgprot(_SEGMENT_ENTRY_INVALID | \
_SEGMENT_ENTRY_PROTECT)
-#define SEGMENT_READ __pgprot(_SEGMENT_ENTRY_PROTECT | \
+#define SEGMENT_RO __pgprot(_SEGMENT_ENTRY_PROTECT | \
+ _SEGMENT_ENTRY_READ | \
+ _SEGMENT_ENTRY_NOEXEC)
+#define SEGMENT_RX __pgprot(_SEGMENT_ENTRY_PROTECT | \
_SEGMENT_ENTRY_READ)
-#define SEGMENT_WRITE __pgprot(_SEGMENT_ENTRY_READ | \
+#define SEGMENT_RW __pgprot(_SEGMENT_ENTRY_READ | \
+ _SEGMENT_ENTRY_WRITE | \
+ _SEGMENT_ENTRY_NOEXEC)
+#define SEGMENT_RWX __pgprot(_SEGMENT_ENTRY_READ | \
_SEGMENT_ENTRY_WRITE)
#define SEGMENT_KERNEL __pgprot(_SEGMENT_ENTRY | \
_SEGMENT_ENTRY_LARGE | \
_SEGMENT_ENTRY_READ | \
_SEGMENT_ENTRY_WRITE | \
_SEGMENT_ENTRY_YOUNG | \
- _SEGMENT_ENTRY_DIRTY)
+ _SEGMENT_ENTRY_DIRTY | \
+ _SEGMENT_ENTRY_NOEXEC)
#define SEGMENT_KERNEL_RO __pgprot(_SEGMENT_ENTRY | \
_SEGMENT_ENTRY_LARGE | \
_SEGMENT_ENTRY_READ | \
_SEGMENT_ENTRY_YOUNG | \
- _SEGMENT_ENTRY_PROTECT)
+ _SEGMENT_ENTRY_PROTECT | \
+ _SEGMENT_ENTRY_NOEXEC)
/*
* Region3 entry (large page) protection definitions.
@@ -451,12 +468,14 @@ static inline int is_module_addr(void *addr)
_REGION3_ENTRY_READ | \
_REGION3_ENTRY_WRITE | \
_REGION3_ENTRY_YOUNG | \
- _REGION3_ENTRY_DIRTY)
+ _REGION3_ENTRY_DIRTY | \
+ _REGION_ENTRY_NOEXEC)
#define REGION3_KERNEL_RO __pgprot(_REGION_ENTRY_TYPE_R3 | \
_REGION3_ENTRY_LARGE | \
_REGION3_ENTRY_READ | \
_REGION3_ENTRY_YOUNG | \
- _REGION_ENTRY_PROTECT)
+ _REGION_ENTRY_PROTECT | \
+ _REGION_ENTRY_NOEXEC)
static inline int mm_has_pgste(struct mm_struct *mm)
{
@@ -621,12 +640,12 @@ static inline int pud_bad(pud_t pud)
static inline int pmd_present(pmd_t pmd)
{
- return pmd_val(pmd) != _SEGMENT_ENTRY_INVALID;
+ return pmd_val(pmd) != _SEGMENT_ENTRY_EMPTY;
}
static inline int pmd_none(pmd_t pmd)
{
- return pmd_val(pmd) == _SEGMENT_ENTRY_INVALID;
+ return pmd_val(pmd) == _SEGMENT_ENTRY_EMPTY;
}
static inline unsigned long pmd_pfn(pmd_t pmd)
@@ -784,7 +803,7 @@ static inline void pud_clear(pud_t *pud)
static inline void pmd_clear(pmd_t *pmdp)
{
- pmd_val(*pmdp) = _SEGMENT_ENTRY_INVALID;
+ pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
}
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
@@ -801,14 +820,14 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
pte_val(pte) &= _PAGE_CHG_MASK;
pte_val(pte) |= pgprot_val(newprot);
/*
- * newprot for PAGE_NONE, PAGE_READ and PAGE_WRITE has the
- * invalid bit set, clear it again for readable, young pages
+ * newprot for PAGE_NONE, PAGE_RO, PAGE_RX, PAGE_RW and PAGE_RWX
+ * has the invalid bit set, clear it again for readable, young pages
*/
if ((pte_val(pte) & _PAGE_YOUNG) && (pte_val(pte) & _PAGE_READ))
pte_val(pte) &= ~_PAGE_INVALID;
/*
- * newprot for PAGE_READ and PAGE_WRITE has the page protection
- * bit set, clear it again for writable, dirty pages
+ * newprot for PAGE_RO, PAGE_RX, PAGE_RW and PAGE_RWX has the page
+ * protection bit set, clear it again for writable, dirty pages
*/
if ((pte_val(pte) & _PAGE_DIRTY) && (pte_val(pte) & _PAGE_WRITE))
pte_val(pte) &= ~_PAGE_PROTECT;
@@ -1029,6 +1048,8 @@ int get_guest_storage_key(struct mm_struct *mm, unsigned long addr,
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
{
+ if (!MACHINE_HAS_NX)
+ pte_val(entry) &= ~_PAGE_NOEXEC;
if (mm_has_pgste(mm))
ptep_set_pte_at(mm, addr, ptep, entry);
else
@@ -1173,14 +1194,18 @@ static inline pud_t pud_mkdirty(pud_t pud)
static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot)
{
/*
- * pgprot is PAGE_NONE, PAGE_READ, or PAGE_WRITE (see __Pxxx / __Sxxx)
- * Convert to segment table entry format.
+ * pgprot is PAGE_NONE, PAGE_RO, PAGE_RX, PAGE_RW or PAGE_RWX
+ * (see __Pxxx / __Sxxx). Convert to segment table entry format.
*/
if (pgprot_val(pgprot) == pgprot_val(PAGE_NONE))
return pgprot_val(SEGMENT_NONE);
- if (pgprot_val(pgprot) == pgprot_val(PAGE_READ))
- return pgprot_val(SEGMENT_READ);
- return pgprot_val(SEGMENT_WRITE);
+ if (pgprot_val(pgprot) == pgprot_val(PAGE_RO))
+ return pgprot_val(SEGMENT_RO);
+ if (pgprot_val(pgprot) == pgprot_val(PAGE_RX))
+ return pgprot_val(SEGMENT_RX);
+ if (pgprot_val(pgprot) == pgprot_val(PAGE_RW))
+ return pgprot_val(SEGMENT_RW);
+ return pgprot_val(SEGMENT_RWX);
}
static inline pmd_t pmd_mkyoung(pmd_t pmd)
@@ -1315,6 +1340,8 @@ static inline int pmdp_clear_flush_young(struct vm_area_struct *vma,
static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t entry)
{
+ if (!MACHINE_HAS_NX)
+ pmd_val(entry) &= ~_SEGMENT_ENTRY_NOEXEC;
*pmdp = entry;
}
@@ -1330,7 +1357,7 @@ static inline pmd_t pmd_mkhuge(pmd_t pmd)
static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
{
- return pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
+ return pmdp_xchg_direct(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR_FULL
@@ -1340,10 +1367,10 @@ static inline pmd_t pmdp_huge_get_and_clear_full(struct mm_struct *mm,
{
if (full) {
pmd_t pmd = *pmdp;
- *pmdp = __pmd(_SEGMENT_ENTRY_INVALID);
+ *pmdp = __pmd(_SEGMENT_ENTRY_EMPTY);
return pmd;
}
- return pmdp_xchg_lazy(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
+ return pmdp_xchg_lazy(mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_PMDP_HUGE_CLEAR_FLUSH
@@ -1357,7 +1384,7 @@ static inline pmd_t pmdp_huge_clear_flush(struct vm_area_struct *vma,
static inline void pmdp_invalidate(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp)
{
- pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_INVALID));
+ pmdp_xchg_direct(vma->vm_mm, addr, pmdp, __pmd(_SEGMENT_ENTRY_EMPTY));
}
#define __HAVE_ARCH_PMDP_SET_WRPROTECT
@@ -1389,7 +1416,7 @@ static inline int pmd_trans_huge(pmd_t pmd)
#define has_transparent_hugepage has_transparent_hugepage
static inline int has_transparent_hugepage(void)
{
- return MACHINE_HAS_HPAGE ? 1 : 0;
+ return MACHINE_HAS_EDAT1 ? 1 : 0;
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */