[PATCH 4/4] x86: use a uniform structure for pte_t

From: Jeremy Fitzhardinge
Date: Fri Dec 14 2007 - 03:13:47 EST

Make pte_t have the same basic structure for all pagetable formats so
that it can be accessed in a uniform way. This means exposing both a
"pte" element which is the whole pte value (32 or 64 bit), and
pte_low+pte_high for users which need to access each half independently
(pte_high doesn't exist for 32-bit pte entries).

This allows a number of follow-on opportunities for sharing code.

Signed-off-by: Jeremy Fitzhardinge <Jeremy.Fitzhardinge@xxxxxxxxxx>
---
arch/x86/kernel/vmi_32.c | 10 +-
arch/x86/xen/mmu.c | 4
include/asm-x86/page.h | 56 +++++-------
include/asm-x86/paravirt.h | 157 ++++++++++++++++++++-------------
include/asm-x86/pgtable-2level.h | 22 ++--
include/asm-x86/pgtable-3level.h | 12 --
include/asm-x86/pgtable.h | 177 +++++++++++++++++++++++++++++++-------
include/asm-x86/pgtable_32.h | 55 -----------
include/asm-x86/pgtable_64.h | 52 +++--------
include/asm-x86/tlbflush.h | 1
include/xen/page.h | 4
11 files changed, 300 insertions(+), 250 deletions(-)

===================================================================
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -475,10 +475,10 @@ static void vmi_set_pmd(pmd_t *pmdp, pmd
static void vmi_set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
#ifdef CONFIG_X86_PAE
- const pte_t pte = { pmdval.pmd, pmdval.pmd >> 32 };
+ const pte_t pte = { .pte = pmdval.pmd };
vmi_check_page_type(__pa(pmdp) >> PAGE_SHIFT, VMI_PAGE_PMD);
#else
- const pte_t pte = { pmdval.pud.pgd.pgd };
+ const pte_t pte = { .pte = pmdval.pud.pgd.pgd };
vmi_check_page_type(__pa(pmdp) >> PAGE_SHIFT, VMI_PAGE_PGD);
#endif
vmi_ops.set_pte(pte, (pte_t *)pmdp, VMI_PAGE_PD);
@@ -508,21 +508,21 @@ static void vmi_set_pud(pud_t *pudp, pud
static void vmi_set_pud(pud_t *pudp, pud_t pudval)
{
/* Um, eww */
- const pte_t pte = { pudval.pgd.pgd, pudval.pgd.pgd >> 32 };
+ const pte_t pte = { .pte = pudval.pgd.pgd };
vmi_check_page_type(__pa(pudp) >> PAGE_SHIFT, VMI_PAGE_PGD);
vmi_ops.set_pte(pte, (pte_t *)pudp, VMI_PAGE_PDP);
}

static void vmi_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- const pte_t pte = { 0 };
+ const pte_t pte = { .pte = 0 };
vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE);
vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0));
}

static void vmi_pmd_clear(pmd_t *pmd)
{
- const pte_t pte = { 0 };
+ const pte_t pte = { .pte = 0 };
vmi_check_page_type(__pa(pmd) >> PAGE_SHIFT, VMI_PAGE_PMD);
vmi_ops.set_pte(pte, (pte_t *)pmd, VMI_PAGE_PD);
}
===================================================================
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -248,7 +248,7 @@ pte_t xen_make_pte(unsigned long long pt

pte &= ~_PAGE_PCD;

- return (pte_t){ pte, pte >> 32 };
+ return (pte_t){ .pte = pte };
}

pmd_t xen_make_pmd(unsigned long long pmd)
@@ -299,7 +299,7 @@ pte_t xen_make_pte(unsigned long pte)

pte &= ~_PAGE_PCD;

- return (pte_t){ pte };
+ return (pte_t){ .pte = pte };
}

pgd_t xen_make_pgd(unsigned long pgd)
===================================================================
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -80,17 +80,8 @@ typedef u32 pgdval_t;
typedef u32 pgdval_t;
typedef u32 pgprotval_t;

-typedef struct { unsigned long pte_low; } pte_t, boot_pte_t;
+typedef union { unsigned long pte, pte_low; } pte_t, boot_pte_t;

-static inline pteval_t native_pte_val(pte_t pte)
-{
- return pte.pte_low;
-}
-
-static inline pte_t native_make_pte(pteval_t val)
-{
- return (pte_t) { val };
-}
#endif /* __ASSEMBLY__ */

#else /* CONFIG_X86_PAE */
@@ -109,17 +100,13 @@ typedef u64 pgdval_t;
typedef u64 pgdval_t;
typedef u64 pgprotval_t;

-typedef struct { unsigned long pte_low, pte_high; } pte_t;
+typedef union {
+ struct {
+ u32 pte_low, pte_high;
+ };
+ pteval_t pte;
+} pte_t;

-static inline pteval_t native_pte_val(pte_t pte)
-{
- return pte.pte_low | ((unsigned long long)pte.pte_high << 32);
-}
-
-static inline pte_t native_make_pte(pteval_t val)
-{
- return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ;
-}
#endif /* __ASSEMBLY__ */

#endif /* CONFIG_X86_PAE */
@@ -140,17 +127,12 @@ typedef u64 pgdval_t;
typedef u64 pgdval_t;
typedef u64 pgprotval_t;

-typedef struct { pteval_t pte; } pte_t;
-
-static inline pteval_t native_pte_val(pte_t pte)
-{
- return pte.pte;
-}
-
-static inline pte_t native_make_pte(pteval_t pte)
-{
- return (pte_t){ pte };
-}
+typedef union {
+ struct {
+ u32 pte_low, pte_high;
+ };
+ pteval_t pte;
+} pte_t;

extern unsigned long phys_base;
extern unsigned long end_pfn;
@@ -244,6 +226,16 @@ static inline pgd_t native_make_pgd(pgdv
return (pgd_t) { val };
}

+static inline pteval_t native_pte_val(pte_t pte)
+{
+ return pte.pte;
+}
+
+static inline pte_t native_make_pte(pteval_t val)
+{
+ return (pte_t) { .pte = val };
+}
+
#if PAGETABLE_LEVELS >= 3

typedef struct { pmdval_t pmd; } pmd_t;
@@ -273,9 +265,11 @@ static inline pudval_t native_pud_val(pu
}
#else /* PAGETABLE_LEVELS == 3 */
#include <asm-generic/pgtable-nopud.h>
+#define native_pud_val(x) native_pgd_val((x).pgd)
#endif /* PAGETABLE_LEVELS == 4 */
#else /* PAGETABLE_LEVELS == 2 */
#include <asm-generic/pgtable-nopmd.h>
+#define native_pmd_val(x) native_pud_val((x).pgd)
#endif /* PAGETABLE_LEVELS >= 3 */
#endif /* __ASSEMBLY__ */

===================================================================
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -829,54 +829,16 @@ static inline void pte_update_defer(stru
}

#ifdef CONFIG_X86_PAE
-static inline pte_t __pte(unsigned long long val)
+static inline pmd_t __pmd(pmdval_t val)
{
- unsigned long long ret = PVOP_CALL2(unsigned long long,
- pv_mmu_ops.make_pte,
- val, val >> 32);
- return (pte_t) { ret, ret >> 32 };
-}
-
-static inline pmd_t __pmd(unsigned long long val)
-{
- return (pmd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pmd,
+ return (pmd_t) { PVOP_CALL2(pmdval_t, pv_mmu_ops.make_pmd,
val, val >> 32) };
}

-static inline pgd_t __pgd(unsigned long long val)
+static inline pmdval_t pmd_val(pmd_t x)
{
- return (pgd_t) { PVOP_CALL2(unsigned long long, pv_mmu_ops.make_pgd,
- val, val >> 32) };
-}
-
-static inline unsigned long long pte_val(pte_t x)
-{
- return PVOP_CALL2(unsigned long long, pv_mmu_ops.pte_val,
- x.pte_low, x.pte_high);
-}
-
-static inline unsigned long long pmd_val(pmd_t x)
-{
- return PVOP_CALL2(unsigned long long, pv_mmu_ops.pmd_val,
+ return PVOP_CALL2(pmdval_t, pv_mmu_ops.pmd_val,
x.pmd, x.pmd >> 32);
-}
-
-static inline unsigned long long pgd_val(pgd_t x)
-{
- return PVOP_CALL2(unsigned long long, pv_mmu_ops.pgd_val,
- x.pgd, x.pgd >> 32);
-}
-
-static inline void set_pte(pte_t *ptep, pte_t pteval)
-{
- PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pteval.pte_low, pteval.pte_high);
-}
-
-static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pteval)
-{
- /* 5 arg words */
- pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
}

static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
@@ -892,16 +854,15 @@ static inline void set_pte_present(struc
pv_mmu_ops.set_pte_present(mm, addr, ptep, pte);
}

-static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
-{
- PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp,
- pmdval.pmd, pmdval.pmd >> 32);
-}
-
static inline void set_pud(pud_t *pudp, pud_t pudval)
{
PVOP_VCALL3(pv_mmu_ops.set_pud, pudp,
pudval.pgd.pgd, pudval.pgd.pgd >> 32);
+}
+
+static inline void pud_clear(pud_t *pudp)
+{
+ /* unused in 32-bit */
}

static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
@@ -913,50 +874,120 @@ static inline void pmd_clear(pmd_t *pmdp
{
PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp);
}
+#endif /* CONFIG_X86_PAE */

-#else /* !CONFIG_X86_PAE */
+static inline pte_t __pte(pteval_t val)
+{
+ pteval_t ret;

-static inline pte_t __pte(unsigned long val)
-{
- return (pte_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pte, val) };
+ if (sizeof(pteval_t) > sizeof(long))
+ ret = PVOP_CALL2(pteval_t, pv_mmu_ops.make_pte,
+ val, (u64)val >> 32);
+ else
+ ret = PVOP_CALL1(pteval_t, pv_mmu_ops.make_pte, val);
+
+ return native_make_pte(ret);
}

-static inline pgd_t __pgd(unsigned long val)
+static inline pteval_t pte_val(pte_t x)
{
- return (pgd_t) { PVOP_CALL1(unsigned long, pv_mmu_ops.make_pgd, val) };
+ pteval_t ret, val;
+
+ val = native_pte_val(x);
+
+ if (sizeof(pteval_t) > sizeof(long))
+ ret = PVOP_CALL2(pteval_t, pv_mmu_ops.pte_val,
+ val, (u64)val >> 32);
+ else
+ ret = PVOP_CALL1(pteval_t, pv_mmu_ops.pte_val, val);
+
+ return ret;
}

-static inline unsigned long pte_val(pte_t x)
+static inline pgd_t __pgd(pgdval_t val)
{
- return PVOP_CALL1(unsigned long, pv_mmu_ops.pte_val, x.pte_low);
+ pgdval_t ret;
+
+ if (sizeof(pgdval_t) > sizeof(long))
+ ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.make_pgd,
+ val, (u64)val >> 32);
+ else
+ ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.make_pgd,
+ val);
+
+ return native_make_pgd(ret);
}

-static inline unsigned long pgd_val(pgd_t x)
+static inline pgdval_t pgd_val(pgd_t x)
{
- return PVOP_CALL1(unsigned long, pv_mmu_ops.pgd_val, x.pgd);
+ pgdval_t ret;
+
+ if (sizeof(pgdval_t) > sizeof(long))
+ ret = PVOP_CALL2(pgdval_t, pv_mmu_ops.pgd_val,
+ x.pgd, (u64)x.pgd >> 32);
+ else
+ ret = PVOP_CALL1(pgdval_t, pv_mmu_ops.pgd_val,
+ x.pgd);
+
+ return ret;
}

static inline void set_pte(pte_t *ptep, pte_t pteval)
{
- PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pteval.pte_low);
+ pteval_t val = native_pte_val(pteval);
+
+ if (sizeof(val) > sizeof(long))
+ PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, val, (u64)val >> 32);
+ else
+ PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, val);
}

static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval)
{
- PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pteval.pte_low);
+ pteval_t val = native_pte_val(pteval);
+
+ if (sizeof(val) > sizeof(long))
+ /* 5 arg words */
+ pv_mmu_ops.set_pte_at(mm, addr, ptep, pteval);
+ else
+ PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, val);
}

-static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
+{
+ pmdval_t val = pmd_val(pmdval);
+
+ if (sizeof(val) > sizeof(long))
+ PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32);
+ else
+ PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val);
+}
+
+#ifndef CONFIG_X86_PAE
+static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
+{
+ set_pte(ptep, pteval);
+}
+
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte)
+{
+ set_pte_at(mm, addr, ptep, pte);
+}
+
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep)
{
set_pte_at(mm, addr, ptep, __pte(0));
}

-static inline void set_pmd(pmd_t *pmdp, pmd_t pmdval)
+static inline void pmd_clear(pmd_t *pmdp)
{
- PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, pmdval.pud.pgd.pgd);
+ set_pmd(pmdp, __pmd(0));
}
#endif /* CONFIG_X86_PAE */
+

/* Lazy mode for batching updates / context switch */
enum paravirt_lazy_mode {
===================================================================
--- a/include/asm-x86/pgtable-2level.h
+++ b/include/asm-x86/pgtable-2level.h
@@ -27,28 +27,26 @@ static inline void native_set_pmd(pmd_t
*pmdp = pmd;
}

-#undef set_pte_atomic
-static inline void set_pte_atomic(pte_t *ptep, pte_t pteval)
+static inline void native_set_pte_atomic(pte_t *ptep, pte_t pteval)
{
- set_pte(ptep, pteval);
+ native_set_pte(ptep, pteval);
}

-static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pteval)
+static inline void native_set_pte_present(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pteval)
{
- set_pte_at(mm, addr, ptep, pteval);
+ native_set_pte_at(mm, addr, ptep, pteval);
}

static inline void native_pte_clear(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
- set_pte_at(mm, addr, ptep, __pte(0));
+ native_set_pte_at(mm, addr, ptep, __pte(0));
}

-#undef pmd_clear
-static inline void pmd_clear(pmd_t *pmdp)
+static inline void native_pmd_clear(pmd_t *pmdp)
{
- set_pmd(pmdp, __pmd(0));
+ native_set_pmd(pmdp, __pmd(0));
}

static inline pte_t native_ptep_get_and_clear(pte_t *xp)
@@ -87,7 +85,7 @@ static inline int pte_exec_kernel(pte_t
#define __swp_offset(x) ((x).val >> 8)
#define __swp_entry(type, offset) \
((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
-#define __pte_to_swp_entry(pte) ((swp_entry_t) { (pte).pte_low })
-#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+#define __pte_to_swp_entry(pte) ((swp_entry_t){.val = native_pte_val(pte)})
+#define __swp_entry_to_pte(x) (native_make_pte((x).val))

#endif /* _I386_PGTABLE_2LEVEL_H */
===================================================================
--- a/include/asm-x86/pgtable-3level.h
+++ b/include/asm-x86/pgtable-3level.h
@@ -105,7 +105,7 @@ static inline void native_pmd_clear(pmd_
* We do not let the generic code free and clear pgd entries due to
* this erratum.
*/
-static inline void pud_clear(pud_t * pud) { }
+static inline void native_pud_clear(pud_t * pud) { }

#define pud_page(pud) \
((struct page *) __va(pud_val(pud) & PAGE_MASK))
@@ -130,12 +130,6 @@ static inline pte_t native_ptep_get_and_
return res;
}

-#define __HAVE_ARCH_PTE_SAME
-static inline int pte_same(pte_t a, pte_t b)
-{
- return a.pte_low == b.pte_low && a.pte_high == b.pte_high;
-}
-
extern unsigned long long __supported_pte_mask;


@@ -151,8 +145,8 @@ extern unsigned long long __supported_pt
#define __swp_type(x) (((x).val) & 0x1f)
#define __swp_offset(x) ((x).val >> 5)
#define __swp_entry(type, offset) ((swp_entry_t){(type) | (offset) << 5})
-#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
-#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
+#define __pte_to_swp_entry(pte) ((swp_entry_t){.val = native_pte_val(pte) >> 32})
+#define __swp_entry_to_pte(x) (native_make_pte((pteval_t)(x).val << 32))

#define __pmd_free_tlb(tlb, x) do { } while (0)

===================================================================
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -5,6 +5,9 @@
#include <asm/page.h>

#ifndef __ASSEMBLY__
+#include <linux/mm_types.h>
+#include <asm/tlbflush.h>
+
/*
* ZERO_PAGE is a global shared page that is always zero: used
* for zero-mapped memory areas etc..
@@ -94,43 +97,153 @@ static inline int pte_huge(pte_t pte)

#endif /* __ASSEMBLY__ */

-#ifdef CONFIG_PARAVIRT
-#include <asm/paravirt.h>
-#else
-#define set_pte(ptep, pte) native_set_pte(ptep, pte)
-#define set_pte_at(mm, addr, ptep, pte) \
- native_set_pte_at(mm, addr, ptep, pte)
-
-#define set_pte_present(mm, addr, ptep, pte) \
- native_set_pte_present(mm, addr, ptep, pte)
-#define set_pte_atomic(ptep, pte) \
- native_set_pte_atomic(ptep, pte)
-
-#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
-
-#ifndef __PAGETABLE_PUD_FOLDED
-#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
-#define set_pud(pudp, pud) native_set_pud(pudp, pud)
-#define pgd_clear(pgd) native_pgd_clear(pgd)
-#endif
-
-#ifndef __PAGETABLE_PMD_FOLDED
-#define pud_clear(pud) native_pud_clear(pud)
-#endif
-
-#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
-#define pmd_clear(pmd) native_pmd_clear(pmd)
-
-#define pte_update(mm, addr, ptep) do { } while (0)
-#define pte_update_defer(mm, addr, ptep) do { } while (0)
-
-#endif /* CONFIG_PARAVIRT */
-
#ifdef CONFIG_X86_32
# include "pgtable_32.h"
#else
# include "pgtable_64.h"
#endif
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_PARAVIRT
+#include <asm/paravirt.h>
+#else /* !CONFIG_PARAVIRT */
+
+static inline void set_pte(pte_t *ptep, pte_t pte)
+{
+ native_set_pte(ptep, pte);
+}
+
+static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte)
+{
+ native_set_pte_at(mm, addr, ptep, pte);
+}
+
+static inline void set_pte_present(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pte)
+{
+ native_set_pte_present(mm, addr, ptep, pte);
+}
+
+static inline void set_pte_atomic(pte_t *ptep, pte_t pte)
+{
+ native_set_pte_atomic(ptep, pte);
+}
+
+static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
+{
+ native_set_pmd(pmdp, pmd);
+}
+
+#ifndef __PAGETABLE_PUD_FOLDED
+static inline void set_pgd(pgd_t *pgdp, pgd_t pgd)
+{
+ native_set_pgd(pgdp, pgd);
+}
+
+static inline void pgd_clear(pgd_t *pgdp)
+{
+ native_pgd_clear(pgdp);
+}
+#endif /* PUD_FOLDED */
+
+#ifndef __PAGETABLE_PMD_FOLDED
+static inline void pud_clear(pud_t *pudp)
+{
+ native_pud_clear(pudp);
+}
+
+static inline void set_pud(pud_t *pudp, pud_t pud)
+{
+ native_set_pud(pudp, pud);
+}
+#endif /* PMD_FOLDED */
+
+static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ native_pte_clear(mm, addr, ptep);
+}
+
+static inline void pmd_clear(pmd_t *pmdp)
+{
+ native_pmd_clear(pmdp);
+}
+
+/*
+ * Rules for using pte_update - it must be called after any PTE update which
+ * has not been done using the set_pte / clear_pte interfaces. It is used by
+ * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
+ * updates should either be sets, clears, or set_pte_atomic for P->P
+ * transitions, which means this hook should only be called for user PTEs.
+ * This hook implies a P->P protection or access change has taken place, which
+ * requires a subsequent TLB flush. The notification can optionally be delayed
+ * until the TLB flush event by using the pte_update_defer form of the
+ * interface, but care must be taken to assure that the flush happens while
+ * still holding the same page table lock so that the shadow and primary pages
+ * do not become out of sync on SMP.
+ */
+static inline void pte_update(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+}
+
+static inline void pte_update_defer(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep)
+{
+}
+#endif /* CONFIG_PARAVIRT */
+
+#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
+static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
+ unsigned long addr, pte_t *ptep)
+{
+ int ret = 0;
+
+ if (pte_young(*ptep))
+ ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, (unsigned long *)&ptep->pte);
+ if (ret)
+ pte_update(vma->vm_mm, addr, ptep);
+
+ return ret;
+}
+
+#define __HAVE_ARCH_PTE_SAME
+static inline int pte_same(pte_t a, pte_t b)
+{
+ return a.pte == b.pte;
+}
+
+/*
+ * We only update the dirty/accessed state if we set
+ * the dirty bit by hand in the kernel, since the hardware
+ * will do the accessed bit for us, and we don't want to
+ * race with other CPU's that might be updating the dirty
+ * bit at the same time.
+ */
+#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+static inline int ptep_set_access_flags(struct vm_area_struct *vma,
+ unsigned long address,
+ pte_t *ptep, pte_t entry, int dirty)
+{
+ int changed = !pte_same(*ptep, entry);
+
+ if (changed && dirty) {
+ set_pte(ptep, entry);
+ pte_update_defer(vma->vm_mm, address, ptep);
+ flush_tlb_page(vma, address);
+ }
+ return changed;
+}
+
+#define __HAVE_ARCH_PTEP_SET_WRPROTECT
+static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+ clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
+ pte_update(mm, addr, ptep);
+}
+
+#endif /* __ASSEMBLY__ */
+

#ifndef __PAGETABLE_PUD_FOLDED
#define PUD_SIZE (_AC(1,UL) << PUD_SHIFT)
===================================================================
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -85,24 +85,6 @@ extern unsigned long pg0[];
# include <asm/pgtable-2level.h>
#endif

-#ifndef CONFIG_PARAVIRT
-/*
- * Rules for using pte_update - it must be called after any PTE update which
- * has not been done using the set_pte / clear_pte interfaces. It is used by
- * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE
- * updates should either be sets, clears, or set_pte_atomic for P->P
- * transitions, which means this hook should only be called for user PTEs.
- * This hook implies a P->P protection or access change has taken place, which
- * requires a subsequent TLB flush. The notification can optionally be delayed
- * until the TLB flush event by using the pte_update_defer form of the
- * interface, but care must be taken to assure that the flush happens while
- * still holding the same page table lock so that the shadow and primary pages
- * do not become out of sync on SMP.
- */
-#define pte_update(mm, addr, ptep) do { } while (0)
-#define pte_update_defer(mm, addr, ptep) do { } while (0)
-#endif
-
/* local pte updates need not use xchg for locking */
static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
{
@@ -113,36 +95,6 @@ static inline pte_t native_local_ptep_ge
return res;
}

-/*
- * We only update the dirty/accessed state if we set
- * the dirty bit by hand in the kernel, since the hardware
- * will do the accessed bit for us, and we don't want to
- * race with other CPU's that might be updating the dirty
- * bit at the same time.
- */
-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-#define ptep_set_access_flags(vma, address, ptep, entry, dirty) \
-({ \
- int __changed = !pte_same(*(ptep), entry); \
- if (__changed && dirty) { \
- (ptep)->pte_low = (entry).pte_low; \
- pte_update_defer((vma)->vm_mm, (address), (ptep)); \
- flush_tlb_page(vma, address); \
- } \
- __changed; \
-})
-
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
- int __ret = 0; \
- if (pte_young(*(ptep))) \
- __ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, \
- &(ptep)->pte_low); \
- if (__ret) \
- pte_update((vma)->vm_mm, addr, ptep); \
- __ret; \
-})
-
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
#define ptep_clear_flush_young(vma, address, ptep) \
({ \
@@ -152,13 +104,6 @@ static inline pte_t native_local_ptep_ge
flush_tlb_page(vma, address); \
__young; \
})
-
-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- clear_bit(_PAGE_BIT_RW, &ptep->pte_low);
- pte_update(mm, addr, ptep);
-}

/*
* clone_pgd_range(pgd_t *dst, pgd_t *src, int count);
===================================================================
--- a/include/asm-x86/pgtable_64.h
+++ b/include/asm-x86/pgtable_64.h
@@ -135,7 +135,16 @@ static inline void native_pgd_clear(pgd_
native_set_pgd(pgd, native_make_pgd(0));
}

-#define pte_same(a, b) ((a).pte == (b).pte)
+static inline void native_set_pte_atomic(pte_t *ptep, pte_t pteval)
+{
+ native_set_pte(ptep, pteval);
+}
+
+static inline void native_set_pte_present(struct mm_struct *mm, unsigned long addr,
+ pte_t *ptep, pte_t pteval)
+{
+ native_set_pte_at(mm, addr, ptep, pteval);
+}

#define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK))

@@ -151,19 +160,6 @@ static inline void native_pgd_clear(pgd_

#ifndef __ASSEMBLY__

-struct vm_area_struct;
-
-static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- if (!pte_young(*ptep))
- return 0;
- return test_and_clear_bit(_PAGE_BIT_ACCESSED, (unsigned long *)&ptep->pte);
-}
-
-static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte);
-}

/*
* Macro to mark a page protection value as "uncacheable".
@@ -206,8 +202,8 @@ static inline void ptep_set_wrprotect(st
pmd_index(address))
#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)

-#define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE })
+#define pte_to_pgoff(pte) ((native_pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
+#define pgoff_to_pte(off) native_make_pte(((off) << PAGE_SHIFT) | _PAGE_FILE)
#define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT

/* PTE - Level 1 access. */
@@ -220,29 +216,13 @@ static inline void ptep_set_wrprotect(st

#define update_mmu_cache(vma,address,pte) do { } while (0)

-/* We only update the dirty/accessed state if we set
- * the dirty bit by hand in the kernel, since the hardware
- * will do the accessed bit for us, and we don't want to
- * race with other CPU's that might be updating the dirty
- * bit at the same time. */
-#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-({ \
- int __changed = !pte_same(*(__ptep), __entry); \
- if (__changed && __dirty) { \
- set_pte(__ptep, __entry); \
- flush_tlb_page(__vma, __address); \
- } \
- __changed; \
-})
-
/* Encode and de-code a swap entry */
#define __swp_type(x) (((x).val >> 1) & 0x3f)
#define __swp_offset(x) ((x).val >> 8)
#define __swp_entry(type, offset) \
((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
-#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
-#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { .val = native_pte_val(pte) })
+#define __swp_entry_to_pte(x) (native_make_pte((x).val))

extern spinlock_t pgd_lock;
extern struct list_head pgd_list;
@@ -268,10 +248,6 @@ pte_t *lookup_address(unsigned long addr
#define kc_offset_to_vaddr(o) \
(((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))

-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_SET_WRPROTECT
-#define __HAVE_ARCH_PTE_SAME
-
#endif /* !__ASSEMBLY__ */

#endif /* _X86_64_PGTABLE_H */
===================================================================
--- a/include/asm-x86/tlbflush.h
+++ b/include/asm-x86/tlbflush.h
@@ -1,7 +1,6 @@
#ifndef _ASM_X86_TLBFLUSH_H
#define _ASM_X86_TLBFLUSH_H

-#include <linux/mm.h>
#include <linux/sched.h>

#include <asm/processor.h>
===================================================================
--- a/include/xen/page.h
+++ b/include/xen/page.h
@@ -156,11 +156,11 @@ static inline pte_t mfn_pte(unsigned lon

static inline unsigned long long pte_val_ma(pte_t x)
{
- return ((unsigned long long)x.pte_high << 32) | x.pte_low;
+ return x.pte;
}
#define pmd_val_ma(v) ((v).pmd)
#define pud_val_ma(v) ((v).pgd.pgd)
-#define __pte_ma(x) ((pte_t) { .pte_low = (x), .pte_high = (x)>>32 } )
+#define __pte_ma(x) ((pte_t) { .pte = (x) })
#define __pmd_ma(x) ((pmd_t) { (x) } )
#else /* !X86_PAE */
#define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/