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Diffstat (limited to 'arch/s390/include/asm/pgtable.h')
-rw-r--r--arch/s390/include/asm/pgtable.h298
1 files changed, 159 insertions, 139 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index fcba5e03839..57c882761de 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -30,6 +30,7 @@
#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/page-flags.h>
+#include <linux/radix-tree.h>
#include <asm/bug.h>
#include <asm/page.h>
@@ -216,7 +217,6 @@ extern unsigned long MODULES_END;
*/
/* Hardware bits in the page table entry */
-#define _PAGE_CO 0x100 /* HW Change-bit override */
#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 */
@@ -233,8 +233,8 @@ extern unsigned long MODULES_END;
#define __HAVE_ARCH_PTE_SPECIAL
/* Set of bits not changed in pte_modify */
-#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_CO | \
- _PAGE_DIRTY | _PAGE_YOUNG)
+#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_SPECIAL | _PAGE_DIRTY | \
+ _PAGE_YOUNG)
/*
* handle_pte_fault uses pte_present, pte_none and pte_file to find out the
@@ -287,7 +287,14 @@ extern unsigned long MODULES_END;
#define _SEGMENT_ENTRY_INVALID 0x20 /* invalid segment table entry */
#define _SEGMENT_ENTRY_COMMON 0x10 /* common segment bit */
#define _SEGMENT_ENTRY_PTL 0x0f /* page table length */
-#define _SEGMENT_ENTRY_NONE _SEGMENT_ENTRY_PROTECT
+
+#define _SEGMENT_ENTRY_DIRTY 0 /* No sw dirty bit for 31-bit */
+#define _SEGMENT_ENTRY_YOUNG 0 /* No sw young bit for 31-bit */
+#define _SEGMENT_ENTRY_READ 0 /* No sw read bit for 31-bit */
+#define _SEGMENT_ENTRY_WRITE 0 /* No sw write bit for 31-bit */
+#define _SEGMENT_ENTRY_LARGE 0 /* No large pages for 31-bit */
+#define _SEGMENT_ENTRY_BITS_LARGE 0
+#define _SEGMENT_ENTRY_ORIGIN_LARGE 0
#define _SEGMENT_ENTRY (_SEGMENT_ENTRY_PTL)
#define _SEGMENT_ENTRY_EMPTY (_SEGMENT_ENTRY_INVALID)
@@ -346,11 +353,10 @@ extern unsigned long MODULES_END;
#define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */
#define _REGION3_ENTRY_RO 0x200 /* page protection bit */
-#define _REGION3_ENTRY_CO 0x100 /* change-recording override */
/* Bits in the segment table entry */
#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL
-#define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff1ff33UL
+#define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff0ff33UL
#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 */
@@ -359,30 +365,33 @@ extern unsigned long MODULES_END;
#define _SEGMENT_ENTRY (0)
#define _SEGMENT_ENTRY_EMPTY (_SEGMENT_ENTRY_INVALID)
-#define _SEGMENT_ENTRY_LARGE 0x400 /* STE-format control, large page */
-#define _SEGMENT_ENTRY_CO 0x100 /* change-recording override */
-#define _SEGMENT_ENTRY_SPLIT 0x001 /* THP splitting bit */
-#define _SEGMENT_ENTRY_YOUNG 0x002 /* SW segment young bit */
-#define _SEGMENT_ENTRY_NONE _SEGMENT_ENTRY_YOUNG
+#define _SEGMENT_ENTRY_DIRTY 0x2000 /* SW segment dirty bit */
+#define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young bit */
+#define _SEGMENT_ENTRY_SPLIT 0x0800 /* THP splitting bit */
+#define _SEGMENT_ENTRY_LARGE 0x0400 /* STE-format control, large page */
+#define _SEGMENT_ENTRY_READ 0x0002 /* SW segment read bit */
+#define _SEGMENT_ENTRY_WRITE 0x0001 /* SW segment write bit */
/*
* Segment table entry encoding (R = read-only, I = invalid, y = young bit):
- * ..R...I...y.
- * prot-none, old ..0...1...1.
- * prot-none, young ..1...1...1.
- * read-only, old ..1...1...0.
- * read-only, young ..1...0...1.
- * read-write, old ..0...1...0.
- * read-write, young ..0...0...1.
+ * dy..R...I...wr
+ * prot-none, clean, old 00..1...1...00
+ * prot-none, clean, young 01..1...1...00
+ * prot-none, dirty, old 10..1...1...00
+ * prot-none, dirty, young 11..1...1...00
+ * read-only, clean, old 00..1...1...01
+ * read-only, clean, young 01..1...0...01
+ * read-only, dirty, old 10..1...1...01
+ * read-only, dirty, young 11..1...0...01
+ * read-write, clean, old 00..1...1...11
+ * read-write, clean, young 01..1...0...11
+ * read-write, dirty, old 10..0...1...11
+ * read-write, dirty, young 11..0...0...11
* The segment table origin is used to distinguish empty (origin==0) from
* read-write, old segment table entries (origin!=0)
*/
-#define _SEGMENT_ENTRY_SPLIT_BIT 0 /* THP splitting bit number */
-
-/* Set of bits not changed in pmd_modify */
-#define _SEGMENT_CHG_MASK (_SEGMENT_ENTRY_ORIGIN | _SEGMENT_ENTRY_LARGE \
- | _SEGMENT_ENTRY_SPLIT | _SEGMENT_ENTRY_CO)
+#define _SEGMENT_ENTRY_SPLIT_BIT 11 /* THP splitting bit number */
/* Page status table bits for virtualization */
#define PGSTE_ACC_BITS 0xf000000000000000UL
@@ -455,10 +464,11 @@ extern unsigned long MODULES_END;
* Segment entry (large page) protection definitions.
*/
#define SEGMENT_NONE __pgprot(_SEGMENT_ENTRY_INVALID | \
- _SEGMENT_ENTRY_NONE)
-#define SEGMENT_READ __pgprot(_SEGMENT_ENTRY_INVALID | \
_SEGMENT_ENTRY_PROTECT)
-#define SEGMENT_WRITE __pgprot(_SEGMENT_ENTRY_INVALID)
+#define SEGMENT_READ __pgprot(_SEGMENT_ENTRY_PROTECT | \
+ _SEGMENT_ENTRY_READ)
+#define SEGMENT_WRITE __pgprot(_SEGMENT_ENTRY_READ | \
+ _SEGMENT_ENTRY_WRITE)
static inline int mm_has_pgste(struct mm_struct *mm)
{
@@ -569,25 +579,23 @@ static inline int pmd_none(pmd_t pmd)
static inline int pmd_large(pmd_t pmd)
{
-#ifdef CONFIG_64BIT
return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) != 0;
-#else
- return 0;
-#endif
}
-static inline int pmd_prot_none(pmd_t pmd)
+static inline int pmd_pfn(pmd_t pmd)
{
- return (pmd_val(pmd) & _SEGMENT_ENTRY_INVALID) &&
- (pmd_val(pmd) & _SEGMENT_ENTRY_NONE);
+ unsigned long origin_mask;
+
+ origin_mask = _SEGMENT_ENTRY_ORIGIN;
+ if (pmd_large(pmd))
+ origin_mask = _SEGMENT_ENTRY_ORIGIN_LARGE;
+ return (pmd_val(pmd) & origin_mask) >> PAGE_SHIFT;
}
static inline int pmd_bad(pmd_t pmd)
{
-#ifdef CONFIG_64BIT
if (pmd_large(pmd))
return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS_LARGE) != 0;
-#endif
return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS) != 0;
}
@@ -607,20 +615,22 @@ extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
#define __HAVE_ARCH_PMD_WRITE
static inline int pmd_write(pmd_t pmd)
{
- if (pmd_prot_none(pmd))
- return 0;
- return (pmd_val(pmd) & _SEGMENT_ENTRY_PROTECT) == 0;
+ return (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE) != 0;
+}
+
+static inline int pmd_dirty(pmd_t pmd)
+{
+ int dirty = 1;
+ if (pmd_large(pmd))
+ dirty = (pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY) != 0;
+ return dirty;
}
static inline int pmd_young(pmd_t pmd)
{
- int young = 0;
-#ifdef CONFIG_64BIT
- if (pmd_prot_none(pmd))
- young = (pmd_val(pmd) & _SEGMENT_ENTRY_PROTECT) != 0;
- else
+ int young = 1;
+ if (pmd_large(pmd))
young = (pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG) != 0;
-#endif
return young;
}
@@ -777,82 +787,67 @@ static inline pgste_t pgste_set_pte(pte_t *ptep, pgste_t pgste, pte_t entry)
/**
* struct gmap_struct - guest address space
+ * @crst_list: list of all crst tables used in the guest address space
* @mm: pointer to the parent mm_struct
+ * @guest_to_host: radix tree with guest to host address translation
+ * @host_to_guest: radix tree with pointer to segment table entries
+ * @guest_table_lock: spinlock to protect all entries in the guest page table
* @table: pointer to the page directory
* @asce: address space control element for gmap page table
- * @crst_list: list of all crst tables used in the guest address space
* @pfault_enabled: defines if pfaults are applicable for the guest
*/
struct gmap {
struct list_head list;
+ struct list_head crst_list;
struct mm_struct *mm;
+ struct radix_tree_root guest_to_host;
+ struct radix_tree_root host_to_guest;
+ spinlock_t guest_table_lock;
unsigned long *table;
unsigned long asce;
+ unsigned long asce_end;
void *private;
- struct list_head crst_list;
bool pfault_enabled;
};
/**
- * struct gmap_rmap - reverse mapping for segment table entries
- * @gmap: pointer to the gmap_struct
- * @entry: pointer to a segment table entry
- * @vmaddr: virtual address in the guest address space
- */
-struct gmap_rmap {
- struct list_head list;
- struct gmap *gmap;
- unsigned long *entry;
- unsigned long vmaddr;
-};
-
-/**
- * struct gmap_pgtable - gmap information attached to a page table
- * @vmaddr: address of the 1MB segment in the process virtual memory
- * @mapper: list of segment table entries mapping a page table
- */
-struct gmap_pgtable {
- unsigned long vmaddr;
- struct list_head mapper;
-};
-
-/**
* struct gmap_notifier - notify function block for page invalidation
* @notifier_call: address of callback function
*/
struct gmap_notifier {
struct list_head list;
- void (*notifier_call)(struct gmap *gmap, unsigned long address);
+ void (*notifier_call)(struct gmap *gmap, unsigned long gaddr);
};
-struct gmap *gmap_alloc(struct mm_struct *mm);
+struct gmap *gmap_alloc(struct mm_struct *mm, unsigned long limit);
void gmap_free(struct gmap *gmap);
void gmap_enable(struct gmap *gmap);
void gmap_disable(struct gmap *gmap);
int gmap_map_segment(struct gmap *gmap, unsigned long from,
unsigned long to, unsigned long len);
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
-unsigned long __gmap_translate(unsigned long address, struct gmap *);
-unsigned long gmap_translate(unsigned long address, struct gmap *);
-unsigned long __gmap_fault(unsigned long address, struct gmap *);
-unsigned long gmap_fault(unsigned long address, struct gmap *);
-void gmap_discard(unsigned long from, unsigned long to, struct gmap *);
-void __gmap_zap(unsigned long address, struct gmap *);
+unsigned long __gmap_translate(struct gmap *, unsigned long gaddr);
+unsigned long gmap_translate(struct gmap *, unsigned long gaddr);
+int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr);
+int gmap_fault(struct gmap *, unsigned long gaddr, unsigned int fault_flags);
+void gmap_discard(struct gmap *, unsigned long from, unsigned long to);
+void __gmap_zap(struct gmap *, unsigned long gaddr);
bool gmap_test_and_clear_dirty(unsigned long address, struct gmap *);
void gmap_register_ipte_notifier(struct gmap_notifier *);
void gmap_unregister_ipte_notifier(struct gmap_notifier *);
int gmap_ipte_notify(struct gmap *, unsigned long start, unsigned long len);
-void gmap_do_ipte_notify(struct mm_struct *, pte_t *);
+void gmap_do_ipte_notify(struct mm_struct *, unsigned long addr, pte_t *);
static inline pgste_t pgste_ipte_notify(struct mm_struct *mm,
+ unsigned long addr,
pte_t *ptep, pgste_t pgste)
{
#ifdef CONFIG_PGSTE
if (pgste_val(pgste) & PGSTE_IN_BIT) {
pgste_val(pgste) &= ~PGSTE_IN_BIT;
- gmap_do_ipte_notify(mm, ptep);
+ gmap_do_ipte_notify(mm, addr, ptep);
}
#endif
return pgste;
@@ -875,8 +870,6 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pgste = pgste_set_pte(ptep, pgste, entry);
pgste_set_unlock(ptep, pgste);
} else {
- if (!(pte_val(entry) & _PAGE_INVALID) && MACHINE_HAS_EDAT1)
- pte_val(entry) |= _PAGE_CO;
*ptep = entry;
}
}
@@ -1046,6 +1039,22 @@ static inline void __ptep_ipte_local(unsigned long address, pte_t *ptep)
: "=m" (*ptep) : "m" (*ptep), "a" (pto), "a" (address));
}
+static inline void __ptep_ipte_range(unsigned long address, int nr, pte_t *ptep)
+{
+ unsigned long pto = (unsigned long) ptep;
+
+#ifndef CONFIG_64BIT
+ /* pto in ESA mode must point to the start of the segment table */
+ pto &= 0x7ffffc00;
+#endif
+ /* Invalidate a range of ptes + global TLB flush of the ptes */
+ do {
+ asm volatile(
+ " .insn rrf,0xb2210000,%2,%0,%1,0"
+ : "+a" (address), "+a" (nr) : "a" (pto) : "memory");
+ } while (nr != 255);
+}
+
static inline void ptep_flush_direct(struct mm_struct *mm,
unsigned long address, pte_t *ptep)
{
@@ -1098,7 +1107,7 @@ static inline int ptep_test_and_clear_user_dirty(struct mm_struct *mm,
pgste_val(pgste) &= ~PGSTE_UC_BIT;
pte = *ptep;
if (dirty && (pte_val(pte) & _PAGE_PRESENT)) {
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, addr, ptep, pgste);
__ptep_ipte(addr, ptep);
if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE))
pte_val(pte) |= _PAGE_PROTECT;
@@ -1115,20 +1124,21 @@ static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
{
pgste_t pgste;
- pte_t pte;
+ pte_t pte, oldpte;
int young;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste);
+ pgste = pgste_ipte_notify(vma->vm_mm, addr, ptep, pgste);
}
- pte = *ptep;
+ oldpte = pte = *ptep;
ptep_flush_direct(vma->vm_mm, addr, ptep);
young = pte_young(pte);
pte = pte_mkold(pte);
if (mm_has_pgste(vma->vm_mm)) {
+ pgste = pgste_update_all(&oldpte, pgste, vma->vm_mm);
pgste = pgste_set_pte(ptep, pgste, pte);
pgste_set_unlock(ptep, pgste);
} else
@@ -1166,7 +1176,7 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
@@ -1190,7 +1200,7 @@ static inline pte_t ptep_modify_prot_start(struct mm_struct *mm,
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste_ipte_notify(mm, ptep, pgste);
+ pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
@@ -1227,7 +1237,7 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste);
+ pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
}
pte = *ptep;
@@ -1261,7 +1271,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
if (!full && mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
pte = *ptep;
@@ -1286,7 +1296,7 @@ static inline pte_t ptep_set_wrprotect(struct mm_struct *mm,
if (pte_write(pte)) {
if (mm_has_pgste(mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(mm, ptep, pgste);
+ pgste = pgste_ipte_notify(mm, address, ptep, pgste);
}
ptep_flush_lazy(mm, address, ptep);
@@ -1312,12 +1322,13 @@ static inline int ptep_set_access_flags(struct vm_area_struct *vma,
return 0;
if (mm_has_pgste(vma->vm_mm)) {
pgste = pgste_get_lock(ptep);
- pgste = pgste_ipte_notify(vma->vm_mm, ptep, pgste);
+ pgste = pgste_ipte_notify(vma->vm_mm, address, ptep, pgste);
}
ptep_flush_direct(vma->vm_mm, address, ptep);
if (mm_has_pgste(vma->vm_mm)) {
+ pgste_set_key(ptep, pgste, entry, vma->vm_mm);
pgste = pgste_set_pte(ptep, pgste, entry);
pgste_set_unlock(ptep, pgste);
} else
@@ -1391,7 +1402,7 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
#define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT)
#define pte_page(x) pfn_to_page(pte_pfn(x))
-#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
+#define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd))
/* Find an entry in the lowest level page table.. */
#define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr))
@@ -1413,41 +1424,75 @@ static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot)
return pgprot_val(SEGMENT_WRITE);
}
-static inline pmd_t pmd_mkyoung(pmd_t pmd)
+static inline pmd_t pmd_wrprotect(pmd_t pmd)
{
-#ifdef CONFIG_64BIT
- if (pmd_prot_none(pmd)) {
+ pmd_val(pmd) &= ~_SEGMENT_ENTRY_WRITE;
+ pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT;
+ return pmd;
+}
+
+static inline pmd_t pmd_mkwrite(pmd_t pmd)
+{
+ pmd_val(pmd) |= _SEGMENT_ENTRY_WRITE;
+ if (pmd_large(pmd) && !(pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY))
+ return pmd;
+ pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT;
+ return pmd;
+}
+
+static inline pmd_t pmd_mkclean(pmd_t pmd)
+{
+ if (pmd_large(pmd)) {
+ pmd_val(pmd) &= ~_SEGMENT_ENTRY_DIRTY;
pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT;
- } else {
+ }
+ return pmd;
+}
+
+static inline pmd_t pmd_mkdirty(pmd_t pmd)
+{
+ if (pmd_large(pmd)) {
+ pmd_val(pmd) |= _SEGMENT_ENTRY_DIRTY;
+ if (pmd_val(pmd) & _SEGMENT_ENTRY_WRITE)
+ pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT;
+ }
+ return pmd;
+}
+
+static inline pmd_t pmd_mkyoung(pmd_t pmd)
+{
+ if (pmd_large(pmd)) {
pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG;
- pmd_val(pmd) &= ~_SEGMENT_ENTRY_INVALID;
+ if (pmd_val(pmd) & _SEGMENT_ENTRY_READ)
+ pmd_val(pmd) &= ~_SEGMENT_ENTRY_INVALID;
}
-#endif
return pmd;
}
static inline pmd_t pmd_mkold(pmd_t pmd)
{
-#ifdef CONFIG_64BIT
- if (pmd_prot_none(pmd)) {
- pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT;
- } else {
+ if (pmd_large(pmd)) {
pmd_val(pmd) &= ~_SEGMENT_ENTRY_YOUNG;
pmd_val(pmd) |= _SEGMENT_ENTRY_INVALID;
}
-#endif
return pmd;
}
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
- int young;
-
- young = pmd_young(pmd);
- pmd_val(pmd) &= _SEGMENT_CHG_MASK;
+ if (pmd_large(pmd)) {
+ pmd_val(pmd) &= _SEGMENT_ENTRY_ORIGIN_LARGE |
+ _SEGMENT_ENTRY_DIRTY | _SEGMENT_ENTRY_YOUNG |
+ _SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_SPLIT;
+ pmd_val(pmd) |= massage_pgprot_pmd(newprot);
+ if (!(pmd_val(pmd) & _SEGMENT_ENTRY_DIRTY))
+ pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT;
+ if (!(pmd_val(pmd) & _SEGMENT_ENTRY_YOUNG))
+ pmd_val(pmd) |= _SEGMENT_ENTRY_INVALID;
+ return pmd;
+ }
+ pmd_val(pmd) &= _SEGMENT_ENTRY_ORIGIN;
pmd_val(pmd) |= massage_pgprot_pmd(newprot);
- if (young)
- pmd = pmd_mkyoung(pmd);
return pmd;
}
@@ -1455,16 +1500,9 @@ static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot)
{
pmd_t __pmd;
pmd_val(__pmd) = physpage + massage_pgprot_pmd(pgprot);
- return pmd_mkyoung(__pmd);
+ return __pmd;
}
-static inline pmd_t pmd_mkwrite(pmd_t pmd)
-{
- /* Do not clobber PROT_NONE segments! */
- if (!pmd_prot_none(pmd))
- pmd_val(pmd) &= ~_SEGMENT_ENTRY_PROTECT;
- return pmd;
-}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLB_PAGE */
static inline void __pmdp_csp(pmd_t *pmdp)
@@ -1555,34 +1593,21 @@ extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
static inline int pmd_trans_splitting(pmd_t pmd)
{
- return pmd_val(pmd) & _SEGMENT_ENTRY_SPLIT;
+ return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) &&
+ (pmd_val(pmd) & _SEGMENT_ENTRY_SPLIT);
}
static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t entry)
{
- if (!(pmd_val(entry) & _SEGMENT_ENTRY_INVALID) && MACHINE_HAS_EDAT1)
- pmd_val(entry) |= _SEGMENT_ENTRY_CO;
*pmdp = entry;
}
static inline pmd_t pmd_mkhuge(pmd_t pmd)
{
pmd_val(pmd) |= _SEGMENT_ENTRY_LARGE;
- return pmd;
-}
-
-static inline pmd_t pmd_wrprotect(pmd_t pmd)
-{
- /* Do not clobber PROT_NONE segments! */
- if (!pmd_prot_none(pmd))
- pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT;
- return pmd;
-}
-
-static inline pmd_t pmd_mkdirty(pmd_t pmd)
-{
- /* No dirty bit in the segment table entry. */
+ pmd_val(pmd) |= _SEGMENT_ENTRY_YOUNG;
+ pmd_val(pmd) |= _SEGMENT_ENTRY_PROTECT;
return pmd;
}
@@ -1647,11 +1672,6 @@ static inline int has_transparent_hugepage(void)
{
return MACHINE_HAS_HPAGE ? 1 : 0;
}
-
-static inline unsigned long pmd_pfn(pmd_t pmd)
-{
- return pmd_val(pmd) >> PAGE_SHIFT;
-}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
/*
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-04-02 22:19:51 +0000