#include <linux/mm_types.h>
#include <linux/page-flags.h>
#include <linux/radix-tree.h>
+#include <linux/atomic.h>
#include <asm/bug.h>
#include <asm/page.h>
-extern pgd_t swapper_pg_dir[] __attribute__ ((aligned (4096)));
+extern pgd_t swapper_pg_dir[];
extern void paging_init(void);
extern void vmem_map_init(void);
+pmd_t *vmem_pmd_alloc(void);
+pte_t *vmem_pte_alloc(void);
+
+enum {
+ PG_DIRECT_MAP_4K = 0,
+ PG_DIRECT_MAP_1M,
+ PG_DIRECT_MAP_2G,
+ PG_DIRECT_MAP_MAX
+};
+
+extern atomic_long_t direct_pages_count[PG_DIRECT_MAP_MAX];
+
+static inline void update_page_count(int level, long count)
+{
+ if (IS_ENABLED(CONFIG_PROC_FS))
+ atomic_long_add(count, &direct_pages_count[level]);
+}
+
+struct seq_file;
+void arch_report_meminfo(struct seq_file *m);
/*
* The S390 doesn't have any external MMU info: the kernel page
* swap .11..ttttt.0
* prot-none, clean, old .11.xx0000.1
* prot-none, clean, young .11.xx0001.1
- * prot-none, dirty, old .10.xx0010.1
- * prot-none, dirty, young .10.xx0011.1
+ * prot-none, dirty, old .11.xx0010.1
+ * prot-none, dirty, young .11.xx0011.1
* read-only, clean, old .11.xx0100.1
* read-only, clean, young .01.xx0101.1
* read-only, dirty, old .11.xx0110.1
#define _REGION3_ENTRY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_LENGTH)
#define _REGION3_ENTRY_EMPTY (_REGION_ENTRY_TYPE_R3 | _REGION_ENTRY_INVALID)
-#define _REGION3_ENTRY_LARGE 0x400 /* RTTE-format control, large page */
-#define _REGION3_ENTRY_RO 0x200 /* page protection bit */
+#define _REGION3_ENTRY_ORIGIN_LARGE ~0x7fffffffUL /* large page address */
+#define _REGION3_ENTRY_ORIGIN ~0x7ffUL/* region third table origin */
+
+#define _REGION3_ENTRY_DIRTY 0x2000 /* SW region dirty bit */
+#define _REGION3_ENTRY_YOUNG 0x1000 /* SW region young bit */
+#define _REGION3_ENTRY_LARGE 0x0400 /* RTTE-format control, large page */
+#define _REGION3_ENTRY_READ 0x0002 /* SW region read bit */
+#define _REGION3_ENTRY_WRITE 0x0001 /* SW region write bit */
+
+#ifdef CONFIG_MEM_SOFT_DIRTY
+#define _REGION3_ENTRY_SOFT_DIRTY 0x4000 /* SW region soft dirty bit */
+#else
+#define _REGION3_ENTRY_SOFT_DIRTY 0x0000 /* SW region soft dirty bit */
+#endif
+
+#define _REGION_ENTRY_BITS 0xfffffffffffff227UL
+#define _REGION_ENTRY_BITS_LARGE 0xffffffff8000fe27UL
/* Bits in the segment table entry */
#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL
#define _SEGMENT_ENTRY_DIRTY 0x2000 /* SW segment dirty bit */
#define _SEGMENT_ENTRY_YOUNG 0x1000 /* SW segment young 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 */
+#define _SEGMENT_ENTRY_WRITE 0x0002 /* SW segment write bit */
+#define _SEGMENT_ENTRY_READ 0x0001 /* SW segment read bit */
#ifdef CONFIG_MEM_SOFT_DIRTY
#define _SEGMENT_ENTRY_SOFT_DIRTY 0x4000 /* SW segment soft dirty bit */
#endif
/*
- * Segment table entry encoding (R = read-only, I = invalid, y = young bit):
- * dy..R...I...rw
+ * Segment table and region3 table entry encoding
+ * (R = read-only, I = invalid, y = young bit):
+ * 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...10
- * read-only, clean, young 01..1...0...10
- * read-only, dirty, old 10..1...1...10
- * read-only, dirty, young 11..1...0...10
+ * 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
/*
* Page protection definitions.
*/
-#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID)
+#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_READ __pgprot(_PAGE_PRESENT | _PAGE_READ | \
_PAGE_INVALID | _PAGE_PROTECT)
#define PAGE_WRITE __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
_SEGMENT_ENTRY_READ)
#define SEGMENT_WRITE __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)
+#define SEGMENT_KERNEL_RO __pgprot(_SEGMENT_ENTRY | \
+ _SEGMENT_ENTRY_LARGE | \
+ _SEGMENT_ENTRY_READ | \
+ _SEGMENT_ENTRY_YOUNG | \
+ _SEGMENT_ENTRY_PROTECT)
+
+/*
+ * Region3 entry (large page) protection definitions.
+ */
+
+#define REGION3_KERNEL __pgprot(_REGION_ENTRY_TYPE_R3 | \
+ _REGION3_ENTRY_LARGE | \
+ _REGION3_ENTRY_READ | \
+ _REGION3_ENTRY_WRITE | \
+ _REGION3_ENTRY_YOUNG | \
+ _REGION3_ENTRY_DIRTY)
+#define REGION3_KERNEL_RO __pgprot(_REGION_ENTRY_TYPE_R3 | \
+ _REGION3_ENTRY_LARGE | \
+ _REGION3_ENTRY_READ | \
+ _REGION3_ENTRY_YOUNG | \
+ _REGION_ENTRY_PROTECT)
static inline int mm_has_pgste(struct mm_struct *mm)
{
return 0;
}
+static inline void csp(unsigned int *ptr, unsigned int old, unsigned int new)
+{
+ register unsigned long reg2 asm("2") = old;
+ register unsigned long reg3 asm("3") = new;
+ unsigned long address = (unsigned long)ptr | 1;
+
+ asm volatile(
+ " csp %0,%3"
+ : "+d" (reg2), "+m" (*ptr)
+ : "d" (reg3), "d" (address)
+ : "cc");
+}
+
+static inline void cspg(unsigned long *ptr, unsigned long old, unsigned long new)
+{
+ register unsigned long reg2 asm("2") = old;
+ register unsigned long reg3 asm("3") = new;
+ unsigned long address = (unsigned long)ptr | 1;
+
+ asm volatile(
+ " .insn rre,0xb98a0000,%0,%3"
+ : "+d" (reg2), "+m" (*ptr)
+ : "d" (reg3), "d" (address)
+ : "cc");
+}
+
+#define CRDTE_DTT_PAGE 0x00UL
+#define CRDTE_DTT_SEGMENT 0x10UL
+#define CRDTE_DTT_REGION3 0x14UL
+#define CRDTE_DTT_REGION2 0x18UL
+#define CRDTE_DTT_REGION1 0x1cUL
+
+static inline void crdte(unsigned long old, unsigned long new,
+ unsigned long table, unsigned long dtt,
+ unsigned long address, unsigned long asce)
+{
+ register unsigned long reg2 asm("2") = old;
+ register unsigned long reg3 asm("3") = new;
+ register unsigned long reg4 asm("4") = table | dtt;
+ register unsigned long reg5 asm("5") = address;
+
+ asm volatile(".insn rrf,0xb98f0000,%0,%2,%4,0"
+ : "+d" (reg2)
+ : "d" (reg3), "d" (reg4), "d" (reg5), "a" (asce)
+ : "memory", "cc");
+}
+
/*
* pgd/pmd/pte query functions
*/
{
if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3)
return 0;
- return (pud_val(pud) & _REGION_ENTRY_INVALID) != 0UL;
+ return pud_val(pud) == _REGION3_ENTRY_EMPTY;
}
static inline int pud_large(pud_t pud)
return !!(pud_val(pud) & _REGION3_ENTRY_LARGE);
}
+static inline unsigned long pud_pfn(pud_t pud)
+{
+ unsigned long origin_mask;
+
+ origin_mask = _REGION3_ENTRY_ORIGIN;
+ if (pud_large(pud))
+ origin_mask = _REGION3_ENTRY_ORIGIN_LARGE;
+ return (pud_val(pud) & origin_mask) >> PAGE_SHIFT;
+}
+
+static inline int pmd_large(pmd_t pmd)
+{
+ return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) != 0;
+}
+
+static inline int pmd_bad(pmd_t pmd)
+{
+ if (pmd_large(pmd))
+ return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS_LARGE) != 0;
+ return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS) != 0;
+}
+
static inline int pud_bad(pud_t pud)
{
- /*
- * With dynamic page table levels the pud can be a region table
- * entry or a segment table entry. Check for the bit that are
- * invalid for either table entry.
- */
- unsigned long mask =
- ~_SEGMENT_ENTRY_ORIGIN & ~_REGION_ENTRY_INVALID &
- ~_REGION_ENTRY_TYPE_MASK & ~_REGION_ENTRY_LENGTH;
- return (pud_val(pud) & mask) != 0;
+ if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) < _REGION_ENTRY_TYPE_R3)
+ return pmd_bad(__pmd(pud_val(pud)));
+ if (pud_large(pud))
+ return (pud_val(pud) & ~_REGION_ENTRY_BITS_LARGE) != 0;
+ return (pud_val(pud) & ~_REGION_ENTRY_BITS) != 0;
}
static inline int pmd_present(pmd_t pmd)
return pmd_val(pmd) == _SEGMENT_ENTRY_INVALID;
}
-static inline int pmd_large(pmd_t pmd)
-{
- return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) != 0;
-}
-
static inline unsigned long pmd_pfn(pmd_t pmd)
{
unsigned long origin_mask;
return (pmd_val(pmd) & origin_mask) >> PAGE_SHIFT;
}
-static inline int pmd_bad(pmd_t pmd)
-{
- if (pmd_large(pmd))
- return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS_LARGE) != 0;
- return (pmd_val(pmd) & ~_SEGMENT_ENTRY_BITS) != 0;
-}
-
#define __HAVE_ARCH_PMD_WRITE
static inline int pmd_write(pmd_t pmd)
{
#define pte_page(x) pfn_to_page(pte_pfn(x))
#define pmd_page(pmd) pfn_to_page(pmd_pfn(pmd))
+#define pud_page(pud) pfn_to_page(pud_pfn(pud))
/* Find an entry in the lowest level page table.. */
#define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr))
#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
#define pte_unmap(pte) do { } while (0)
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE)
-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.
- */
- 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);
-}
-
static inline pmd_t pmd_wrprotect(pmd_t pmd)
{
pmd_val(pmd) &= ~_SEGMENT_ENTRY_WRITE;
return pmd;
}
+static inline pud_t pud_wrprotect(pud_t pud)
+{
+ pud_val(pud) &= ~_REGION3_ENTRY_WRITE;
+ pud_val(pud) |= _REGION_ENTRY_PROTECT;
+ return pud;
+}
+
+static inline pud_t pud_mkwrite(pud_t pud)
+{
+ pud_val(pud) |= _REGION3_ENTRY_WRITE;
+ if (pud_large(pud) && !(pud_val(pud) & _REGION3_ENTRY_DIRTY))
+ return pud;
+ pud_val(pud) &= ~_REGION_ENTRY_PROTECT;
+ return pud;
+}
+
+static inline pud_t pud_mkclean(pud_t pud)
+{
+ if (pud_large(pud)) {
+ pud_val(pud) &= ~_REGION3_ENTRY_DIRTY;
+ pud_val(pud) |= _REGION_ENTRY_PROTECT;
+ }
+ return pud;
+}
+
+static inline pud_t pud_mkdirty(pud_t pud)
+{
+ if (pud_large(pud)) {
+ pud_val(pud) |= _REGION3_ENTRY_DIRTY |
+ _REGION3_ENTRY_SOFT_DIRTY;
+ if (pud_val(pud) & _REGION3_ENTRY_WRITE)
+ pud_val(pud) &= ~_REGION_ENTRY_PROTECT;
+ }
+ return pud;
+}
+
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE)
+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.
+ */
+ 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);
+}
+
static inline pmd_t pmd_mkyoung(pmd_t pmd)
{
if (pmd_large(pmd)) {
static inline void __pmdp_csp(pmd_t *pmdp)
{
- register unsigned long reg2 asm("2") = pmd_val(*pmdp);
- register unsigned long reg3 asm("3") = pmd_val(*pmdp) |
- _SEGMENT_ENTRY_INVALID;
- register unsigned long reg4 asm("4") = ((unsigned long) pmdp) + 5;
-
- asm volatile(
- " csp %1,%3"
- : "=m" (*pmdp)
- : "d" (reg2), "d" (reg3), "d" (reg4), "m" (*pmdp) : "cc");
+ csp((unsigned int *)pmdp + 1, pmd_val(*pmdp),
+ pmd_val(*pmdp) | _SEGMENT_ENTRY_INVALID);
}
static inline void __pmdp_idte(unsigned long address, pmd_t *pmdp)
: "cc" );
}
+static inline void __pudp_idte(unsigned long address, pud_t *pudp)
+{
+ unsigned long r3o;
+
+ r3o = (unsigned long) pudp - pud_index(address) * sizeof(pud_t);
+ r3o |= _ASCE_TYPE_REGION3;
+ asm volatile(
+ " .insn rrf,0xb98e0000,%2,%3,0,0"
+ : "=m" (*pudp)
+ : "m" (*pudp), "a" (r3o), "a" ((address & PUD_MASK))
+ : "cc");
+}
+
static inline void __pmdp_idte_local(unsigned long address, pmd_t *pmdp)
{
unsigned long sto;
: "cc" );
}
+static inline void __pudp_idte_local(unsigned long address, pud_t *pudp)
+{
+ unsigned long r3o;
+
+ r3o = (unsigned long) pudp - pud_index(address) * sizeof(pud_t);
+ r3o |= _ASCE_TYPE_REGION3;
+ asm volatile(
+ " .insn rrf,0xb98e0000,%2,%3,0,1"
+ : "=m" (*pudp)
+ : "m" (*pudp), "a" (r3o), "a" ((address & PUD_MASK))
+ : "cc");
+}
+
pmd_t pmdp_xchg_direct(struct mm_struct *, unsigned long, pmd_t *, pmd_t);
pmd_t pmdp_xchg_lazy(struct mm_struct *, unsigned long, pmd_t *, pmd_t);
+pud_t pudp_xchg_direct(struct mm_struct *, unsigned long, pud_t *, pud_t);
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
projects / cascardo / linux.git / blobdiff