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CONFIG_HIGHPTE vs. sub-page page tables.

Browse Source 
Background: I've implemented 1K/2K page tables for s390.  These sub-page
page tables are required to properly support the s390 virtualization
instruction with KVM.  The SIE instruction requires that the page tables
have 256 page table entries (pte) followed by 256 page status table entries
(pgste).  The pgstes are only required if the process is using the SIE
instruction.  The pgstes are updated by the hardware and by the hypervisor
for a number of reasons, one of them is dirty and reference bit tracking.
To avoid wasting memory the standard pte table allocation should return
1K/2K (31/64 bit) and 2K/4K if the process is using SIE.

Problem: Page size on s390 is 4K, page table size is 1K or 2K.  That means
the s390 version for pte_alloc_one cannot return a pointer to a struct
page.  Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one
cannot return a pointer to a pte either, since that would require more than
32 bit for the return value of pte_alloc_one (and the pte * would not be
accessible since its not kmapped).

Solution: The only solution I found to this dilemma is a new typedef: a
pgtable_t.  For s390 pgtable_t will be a (pte *) - to be introduced with a
later patch.  For everybody else it will be a (struct page *).  The
additional problem with the initialization of the ptl lock and the
NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and
a destructor pgtable_page_dtor.  The page table allocation and free
functions need to call these two whenever a page table page is allocated or
freed.  pmd_populate will get a pgtable_t instead of a struct page pointer.
 To get the pgtable_t back from a pmd entry that has been installed with
pmd_populate a new function pmd_pgtable is added.  It replaces the pmd_page
call in free_pte_range and apply_to_pte_range.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Martin Schwidefsky 2008-02-08 04:22:04 -08:00 committed by Linus Torvalds
parent 13214adf73
commit 2f569afd9c
53 changed files with 326 additions and 132 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/frv/mm/pgalloc.c
View File

@ -28,7 +28,7 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
return pte;
}
struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *page;
@ -37,9 +37,11 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
#else
page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
#endif
if (page)
if (page) {
clear_highpage(page);
flush_dcache_page(page);
pgtable_page_ctor(page);
flush_dcache_page(page);
}
return page;
}

14
arch/powerpc/mm/pgtable_32.c
View File

@ -107,19 +107,20 @@ __init_refok pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long add
return pte;
}
struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *ptepage;
#ifdef CONFIG_HIGHPTE
gfp_t flags = GFP_KERNEL | __GFP_HIGHMEM | __GFP_REPEAT;
gfp_t flags = GFP_KERNEL | __GFP_HIGHMEM | __GFP_REPEAT | __GFP_ZERO;
#else
gfp_t flags = GFP_KERNEL | __GFP_REPEAT;
gfp_t flags = GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO;
#endif
ptepage = alloc_pages(flags, 0);
if (ptepage)
clear_highpage(ptepage);
if (!ptepage)
return NULL;
pgtable_page_ctor(ptepage);
return ptepage;
}
@ -131,11 +132,12 @@ void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
void pte_free(struct mm_struct *mm, struct page *ptepage)
void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
#ifdef CONFIG_SMP
hash_page_sync();
#endif
pgtable_page_dtor(ptepage);
__free_page(ptepage);
}

9
arch/ppc/mm/pgtable.c
View File

@ -95,7 +95,7 @@ __init_refok pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long add
return pte;
}
struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *ptepage;
@ -106,8 +106,10 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
#endif
ptepage = alloc_pages(flags, 0);
if (ptepage)
if (ptepage) {
clear_highpage(ptepage);
pgtable_page_ctor(ptepage);
}
return ptepage;
}
@ -119,11 +121,12 @@ void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
void pte_free(struct mm_struct *mm, struct page *ptepage)
void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
#ifdef CONFIG_SMP
hash_page_sync();
#endif
pgtable_page_dtor(ptepage);
__free_page(ptepage);
}

2
arch/s390/mm/pgtable.c
View File

@ -78,6 +78,7 @@ unsigned long *page_table_alloc(int noexec)
clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
page->index = (addr_t) table;
}
pgtable_page_ctor(page);
table = (unsigned long *) page_to_phys(page);
clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
return table;
@ -87,6 +88,7 @@ void page_table_free(unsigned long *table)
{
unsigned long *shadow = get_shadow_pte(table);
pgtable_page_dtor(virt_to_page(table));
if (shadow)
free_page((unsigned long) shadow);
free_page((unsigned long) table);

10
arch/sparc/mm/srmmu.c
View File

@ -489,14 +489,17 @@ srmmu_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
return (pte_t *)srmmu_get_nocache(PTE_SIZE, PTE_SIZE);
}
static struct page *
static pgtable_t
srmmu_pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
unsigned long pte;
struct page *page;
if ((pte = (unsigned long)srmmu_pte_alloc_one_kernel(mm, address)) == 0)
return NULL;
return pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
page = pfn_to_page( __nocache_pa(pte) >> PAGE_SHIFT );
pgtable_page_ctor(page);
return page;
}
static void srmmu_free_pte_fast(pte_t *pte)
@ -504,10 +507,11 @@ static void srmmu_free_pte_fast(pte_t *pte)
srmmu_free_nocache((unsigned long)pte, PTE_SIZE);
}
static void srmmu_pte_free(struct page *pte)
static void srmmu_pte_free(pgtable_t pte)
{
unsigned long p;
pgtable_page_dtor(pte);
p = (unsigned long)page_address(pte); /* Cached address (for test) */
if (p == 0)
BUG();

14
arch/sparc/mm/sun4c.c
View File

@ -1947,12 +1947,17 @@ static pte_t *sun4c_pte_alloc_one_kernel(struct mm_struct *mm, unsigned long add
return pte;
}
static struct page *sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address)
static pgtable_t sun4c_pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
pte_t *pte = sun4c_pte_alloc_one_kernel(mm, address);
pte_t *pte;
struct page *page;
pte = sun4c_pte_alloc_one_kernel(mm, address);
if (pte == NULL)
return NULL;
return virt_to_page(pte);
page = virt_to_page(pte);
pgtable_page_ctor(page);
return page;
}
static inline void sun4c_free_pte_fast(pte_t *pte)
@ -1962,8 +1967,9 @@ static inline void sun4c_free_pte_fast(pte_t *pte)
pgtable_cache_size++;
}
static void sun4c_pte_free(struct page *pte)
static void sun4c_pte_free(pgtable_t pte)
{
pgtable_page_dtor(pte);
sun4c_free_pte_fast(page_address(pte));
}

4
arch/um/kernel/mem.c
View File

@ -354,11 +354,13 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
return pte;
}
struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
if (pte)
pgtable_page_ctor(pte);
return pte;
}

5
arch/x86/mm/pgtable_32.c
View File

@ -183,7 +183,7 @@ pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
return (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
}
struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
@ -192,6 +192,8 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
#else
pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
#endif
if (pte)
pgtable_page_ctor(pte);
return pte;
}
@ -365,6 +367,7 @@ void check_pgt_cache(void)
void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
{
pgtable_page_dtor(pte);
paravirt_release_pt(page_to_pfn(pte));
tlb_remove_page(tlb, pte);
}

2
include/asm-alpha/page.h
View File

@ -62,6 +62,8 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
typedef struct page *pgtable_t;
#ifdef USE_48_BIT_KSEG
#define PAGE_OFFSET 0xffff800000000000UL
#else

22
include/asm-alpha/pgalloc.h
View File

@ -11,10 +11,11 @@
*/
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
{
pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
@ -57,18 +58,23 @@ pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
static inline struct page *
pte_alloc_one(struct mm_struct *mm, unsigned long addr)
static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
pte_t *pte = pte_alloc_one_kernel(mm, addr);
if (pte)
return virt_to_page(pte);
return NULL;
pte_t *pte = pte_alloc_one_kernel(mm, address);
struct page *page;
if (!pte)
return NULL;
page = virt_to_page(pte);
pgtable_page_ctor(page);
return page;
}
static inline void
pte_free(struct mm_struct *mm, struct page *page)
pte_free(struct mm_struct *mm, pgtable_t page)
{
pgtable_page_dtor(page);
__free_page(page);
}

2
include/asm-arm/page.h
View File

@ -171,6 +171,8 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
typedef struct page *pgtable_t;
#endif /* CONFIG_MMU */
#include <asm/memory.h>

9
include/asm-arm/pgalloc.h
View File

@ -66,7 +66,7 @@ pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr)
return pte;
}
static inline struct page *
static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long addr)
{
struct page *pte;
@ -75,6 +75,7 @@ pte_alloc_one(struct mm_struct *mm, unsigned long addr)
if (pte) {
void *page = page_address(pte);
clean_dcache_area(page, sizeof(pte_t) * PTRS_PER_PTE);
pgtable_page_ctor(pte);
}
return pte;
@ -91,8 +92,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
}
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
@ -123,10 +125,11 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
}
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
pmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep)
{
__pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
}
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif /* CONFIG_MMU */

1
include/asm-avr32/page.h
View File

@ -34,6 +34,7 @@ extern void copy_page(void *to, void *from);
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd)

16
include/asm-avr32/pgalloc.h
View File

@ -17,10 +17,11 @@
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
struct page *pte)
pgtable_t pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables
@ -51,7 +52,9 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm,
struct page *pte;
pte = alloc_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
if (!pte)
return NULL;
pgtable_page_ctor(pte);
return pte;
}
@ -60,12 +63,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)
#define check_pgt_cache() do { } while(0)

1
include/asm-cris/page.h
View File

@ -26,6 +26,7 @@
typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#endif
#define pte_val(x) ((x).pte)

14
include/asm-cris/pgalloc.h
View File

@ -6,6 +6,7 @@
#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, pte)
#define pmd_populate(mm, pmd, pte) pmd_set(pmd, page_address(pte))
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@ -27,10 +28,11 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long ad
return pte;
}
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
pgtable_page_ctor(pte);
return pte;
}
@ -39,13 +41,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)
#define check_pgt_cache() do { } while (0)

1
include/asm-frv/page.h
View File

@ -25,6 +25,7 @@ typedef struct { unsigned long ste[64];} pmd_t;
typedef struct { pmd_t pue[1]; } pud_t;
typedef struct { pud_t pge[1]; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((x).ste[0])

12
include/asm-frv/pgalloc.h
View File

@ -25,6 +25,7 @@
do { \
__set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE); \
} while(0)
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@ -35,19 +36,24 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *);
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb),(pte)); \
} while (0)
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is

2
include/asm-ia64/page.h
View File

@ -185,6 +185,7 @@ get_order (unsigned long size)
#endif
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
# define pte_val(x) ((x).pte)
# define pmd_val(x) ((x).pmd)
@ -206,6 +207,7 @@ get_order (unsigned long size)
typedef unsigned long pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;
typedef struct page *pgtable_t;
# endif
# define pte_val(x) (x)

20
include/asm-ia64/pgalloc.h
View File

@ -70,10 +70,11 @@ static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
#define __pmd_free_tlb(tlb, pmd) pmd_free((tlb)->mm, pmd)
static inline void
pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte)
pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
{
pmd_val(*pmd_entry) = page_to_phys(pte);
}
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
@ -81,11 +82,17 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
pmd_val(*pmd_entry) = __pa(pte);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr)
{
void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
return pg ? virt_to_page(pg) : NULL;
struct page *page;
void *pg;
pg = quicklist_alloc(0, GFP_KERNEL, NULL);
if (!pg)
return NULL;
page = virt_to_page(pg);
pgtable_page_ctor(page);
return page;
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
@ -94,8 +101,9 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return quicklist_alloc(0, GFP_KERNEL, NULL);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
quicklist_free_page(0, NULL, pte);
}

1
include/asm-m32r/page.h
View File

@ -28,6 +28,7 @@ typedef struct { unsigned long pgd; } pgd_t;
#define PTE_MASK PAGE_MASK
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pmd_val(x) ((x).pmd)
#define pgd_val(x) ((x).pgd)

10
include/asm-m32r/pgalloc.h
View File

@ -9,10 +9,11 @@
set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
struct page *pte)
pgtable_t pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@ -37,12 +38,12 @@ static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return pte;
}
static __inline__ struct page *pte_alloc_one(struct mm_struct *mm,
static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
pgtable_page_ctor(pte);
return pte;
}
@ -51,8 +52,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}

14
include/asm-m68k/motorola_pgalloc.h
View File

@ -7,7 +7,6 @@
extern pmd_t *get_pointer_table(void);
extern int free_pointer_table(pmd_t *);
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
pte_t *pte;
@ -28,7 +27,7 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long) pte);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
pte_t *pte;
@ -43,19 +42,21 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long add
nocache_page(pte);
}
kunmap(pte);
pgtable_page_ctor(page);
return page;
}
static inline void pte_free(struct mm_struct *mm, struct page *page)
static inline void pte_free(struct mm_struct *mm, pgtable_t page)
{
pgtable_page_dtor(page);
cache_page(kmap(page));
kunmap(page);
__free_page(page);
}
static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *page)
static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page)
{
pgtable_page_dtor(page);
cache_page(kmap(page));
kunmap(page);
__free_page(page);
@ -94,10 +95,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *
pmd_set(pmd, pte);
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
{
pmd_set(pmd, page_address(page));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
{

1
include/asm-m68k/page.h
View File

@ -91,6 +91,7 @@ typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd[16]; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pmd_val(x) ((&x)->pmd[0])

17
include/asm-m68k/sun3_pgalloc.h
View File

@ -26,12 +26,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long) pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *page)
static inline void pte_free(struct mm_struct *mm, pgtable_t page)
{
pgtable_page_dtor(page);
__free_page(page);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
unsigned long address)
@ -45,8 +50,8 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return (pte_t *) (page);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
@ -54,6 +59,7 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm,
return NULL;
clear_highpage(page);
pgtable_page_ctor(page);
return page;
}
@ -63,10 +69,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *
pmd_val(*pmd) = __pa((unsigned long)pte);
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
{
pmd_val(*pmd) = __pa((unsigned long)page_address(page));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is

1
include/asm-mips/page.h
View File

@ -90,6 +90,7 @@ typedef struct { unsigned long pte; } pte_t;
#define pte_val(x) ((x).pte)
#define __pte(x) ((pte_t) { (x) } )
#endif
typedef struct page *pgtable_t;
/*
* For 3-level pagetables we defines these ourselves, for 2-level the

17
include/asm-mips/pgalloc.h
View File

@ -20,10 +20,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
struct page *pte)
pgtable_t pte)
{
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Initialize a new pmd table with invalid pointers.
@ -79,9 +80,10 @@ static inline struct page *pte_alloc_one(struct mm_struct *mm,
struct page *pte;
pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);
if (pte)
if (pte) {
clear_highpage(pte);
pgtable_page_ctor(pte);
}
return pte;
}
@ -90,12 +92,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_pages((unsigned long)pte, PTE_ORDER);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_pages(pte, PTE_ORDER);
}
#define __pte_free_tlb(tlb, pte) tlb_remove_page((tlb), (pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb), pte); \
} while (0)
#ifdef CONFIG_32BIT

1
include/asm-parisc/page.h
View File

@ -91,6 +91,7 @@ typedef unsigned long pgprot_t;
#endif /* STRICT_MM_TYPECHECKS */
typedef struct page *pgtable_t;
typedef struct __physmem_range {
unsigned long start_pfn;

11
include/asm-parisc/pgalloc.h
View File

@ -115,11 +115,14 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
#define pmd_populate(mm, pmd, pte_page) \
pmd_populate_kernel(mm, pmd, page_address(pte_page))
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline struct page *
static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *page = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
if (page)
pgtable_page_ctor(page);
return page;
}
@ -135,7 +138,11 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
#define pte_free(mm, page) pte_free_kernel(page_address(page))
static inline void pte_free_kernel(struct mm_struct *mm, struct page *pte)
{
pgtable_page_dtor(pte);
pte_free_kernel(page_address((pte));
}
#define check_pgt_cache() do { } while (0)

2
include/asm-powerpc/page.h
View File

@ -190,6 +190,8 @@ extern int page_is_ram(unsigned long pfn);
struct vm_area_struct;
typedef struct page *pgtable_t;
#include <asm-generic/memory_model.h>
#endif /* __ASSEMBLY__ */

6
include/asm-powerpc/pgalloc-32.h
View File

@ -22,17 +22,19 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte) \
(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
#define pmd_pgtable(pmd) pmd_page(pmd)
#else
#define pmd_populate_kernel(mm, pmd, pte) \
(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte) \
(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif
extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
extern void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
extern void pte_free(struct mm_struct *mm, struct page *pte);
extern void pte_free(struct mm_struct *mm, pgtable_t pte);
#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, (pte))

27
include/asm-powerpc/pgalloc-64.h
View File

@ -58,6 +58,7 @@ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
#define pmd_populate(mm, pmd, pte_page) \
pmd_populate_kernel(mm, pmd, page_address(pte_page))
#define pmd_populate_kernel(mm, pmd, pte) pmd_set(pmd, (unsigned long)(pte))
#define pmd_pgtable(pmd) pmd_page(pmd)
#else /* CONFIG_PPC_64K_PAGES */
@ -72,6 +73,7 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
#define pmd_populate(mm, pmd, pte_page) \
pmd_populate_kernel(mm, pmd, page_address(pte_page))
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif /* CONFIG_PPC_64K_PAGES */
@ -92,11 +94,18 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
pte_t *pte = pte_alloc_one_kernel(mm, address);
return pte ? virt_to_page(pte) : NULL;
struct page *page;
pte_t *pte;
pte = pte_alloc_one_kernel(mm, address);
if (!pte)
return NULL;
page = virt_to_page(pte);
pgtable_page_ctor(page);
return page;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@ -104,8 +113,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pgtable_page_dtor(ptepage);
__free_page(ptepage);
}
@ -136,9 +146,12 @@ static inline void pgtable_free(pgtable_free_t pgf)
extern void pgtable_free_tlb(struct mmu_gather *tlb, pgtable_free_t pgf);
#define __pte_free_tlb(tlb, ptepage) \
#define __pte_free_tlb(tlb,ptepage) \
do { \
pgtable_page_dtor(ptepage); \
pgtable_free_tlb(tlb, pgtable_free_cache(page_address(ptepage), \
PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1))
PTE_NONCACHE_NUM, PTE_TABLE_SIZE-1)); \
} while (0)
#define __pmd_free_tlb(tlb, pmd) \
pgtable_free_tlb(tlb, pgtable_free_cache(pmd, \
PMD_CACHE_NUM, PMD_TABLE_SIZE-1))

6
include/asm-ppc/pgalloc.h
View File

@ -23,17 +23,19 @@ extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
(pmd_val(*(pmd)) = __pa(pte) | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte) \
(pmd_val(*(pmd)) = (page_to_pfn(pte) << PAGE_SHIFT) | _PMD_PRESENT)
#define pmd_pgtable(pmd) pmd_page(pmd)
#else
#define pmd_populate_kernel(mm, pmd, pte) \
(pmd_val(*(pmd)) = (unsigned long)pte | _PMD_PRESENT)
#define pmd_populate(mm, pmd, pte) \
(pmd_val(*(pmd)) = (unsigned long)lowmem_page_address(pte) | _PMD_PRESENT)
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif
extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr);
extern struct page *pte_alloc_one(struct mm_struct *mm, unsigned long addr);
extern pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr);
extern void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
extern void pte_free(struct mm_struct *mm, struct page *pte);
extern void pte_free(struct mm_struct *mm, pgtable_t pte);
#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, (pte))

2
include/asm-s390/page.h
View File

@ -109,6 +109,8 @@ typedef struct { unsigned long pgd; } pgd_t;
#endif /* __s390x__ */
typedef struct page *pgtable_t;
#define __pte(x) ((pte_t) { (x) } )
#define __pmd(x) ((pmd_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )

3
include/asm-s390/pgalloc.h
View File

@ -132,7 +132,7 @@ pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
}
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
{
pte_t *pte = (pte_t *)page_to_phys(page);
pmd_t *shadow_pmd = get_shadow_table(pmd);
@ -142,6 +142,7 @@ pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
if (shadow_pmd && shadow_pte)
pmd_populate_kernel(mm, shadow_pmd, shadow_pte);
}
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* page table entry allocation/free routines.

2
include/asm-s390/tlb.h
View File

@ -95,7 +95,7 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
* pte_free_tlb frees a pte table and clears the CRSTE for the
* page table from the tlb.
*/
static inline void pte_free_tlb(struct mmu_gather *tlb, struct page *page)
static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t page)
{
if (!tlb->fullmm) {
tlb->array[tlb->nr_ptes++] = page;

2
include/asm-sh/page.h
View File

@ -100,6 +100,8 @@ typedef struct { unsigned long pgd; } pgd_t;
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
typedef struct page *pgtable_t;
#endif /* !__ASSEMBLY__ */
/*

27
include/asm-sh/pgalloc.h
View File

@ -14,10 +14,11 @@ static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
}
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
struct page *pte)
pgtable_t pte)
{
set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void pgd_ctor(void *x)
{
@ -47,11 +48,18 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
void *pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
return pg ? virt_to_page(pg) : NULL;
struct page *page;
void *pg;
pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
if (!pg)
return NULL;
page = virt_to_page(pg);
pgtable_page_ctor(page);
return page;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@ -59,12 +67,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
quicklist_free(QUICK_PT, NULL, pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
quicklist_free_page(QUICK_PT, NULL, pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb), (pte)); \
} while (0)
/*
* allocating and freeing a pmd is trivial: the 1-entry pmd is

2
include/asm-sparc/page.h
View File

@ -123,6 +123,8 @@ typedef unsigned long iopgprot_t;
#endif
typedef struct page *pgtable_t;
extern unsigned long sparc_unmapped_base;
BTFIXUPDEF_SETHI(sparc_unmapped_base)

5
include/asm-sparc/pgalloc.h
View File

@ -50,10 +50,11 @@ BTFIXUPDEF_CALL(void, free_pmd_fast, pmd_t *)
BTFIXUPDEF_CALL(void, pmd_populate, pmd_t *, struct page *)
#define pmd_populate(MM, PMD, PTE) BTFIXUP_CALL(pmd_populate)(PMD, PTE)
#define pmd_pgtable(pmd) pmd_page(pmd)
BTFIXUPDEF_CALL(void, pmd_set, pmd_t *, pte_t *)
#define pmd_populate_kernel(MM, PMD, PTE) BTFIXUP_CALL(pmd_set)(PMD, PTE)
BTFIXUPDEF_CALL(struct page *, pte_alloc_one, struct mm_struct *, unsigned long)
BTFIXUPDEF_CALL(pgtable_t , pte_alloc_one, struct mm_struct *, unsigned long)
#define pte_alloc_one(mm, address) BTFIXUP_CALL(pte_alloc_one)(mm, address)
BTFIXUPDEF_CALL(pte_t *, pte_alloc_one_kernel, struct mm_struct *, unsigned long)
#define pte_alloc_one_kernel(mm, addr) BTFIXUP_CALL(pte_alloc_one_kernel)(mm, addr)
@ -61,7 +62,7 @@ BTFIXUPDEF_CALL(pte_t *, pte_alloc_one_kernel, struct mm_struct *, unsigned long
BTFIXUPDEF_CALL(void, free_pte_fast, pte_t *)
#define pte_free_kernel(mm, pte) BTFIXUP_CALL(free_pte_fast)(pte)
BTFIXUPDEF_CALL(void, pte_free, struct page *)
BTFIXUPDEF_CALL(void, pte_free, pgtable_t )
#define pte_free(mm, pte) BTFIXUP_CALL(pte_free)(pte)
#define __pte_free_tlb(tlb, pte) pte_free((tlb)->mm, pte)

2
include/asm-sparc64/page.h
View File

@ -104,6 +104,8 @@ typedef unsigned long pgprot_t;
#endif /* (STRICT_MM_TYPECHECKS) */
typedef struct page *pgtable_t;
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
(_AC(0x0000000070000000,UL)) : \
(_AC(0xfffff80000000000,UL) + (1UL << 32UL)))

19
include/asm-sparc64/pgalloc.h
View File

@ -43,11 +43,18 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return quicklist_alloc(0, GFP_KERNEL, NULL);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long address)
{
void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
return pg ? virt_to_page(pg) : NULL;
struct page *page;
void *pg;
pg = quicklist_alloc(0, GFP_KERNEL, NULL);
if (!pg)
return NULL;
page = virt_to_page(pg);
pgtable_page_ctor(page);
return page;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@ -55,8 +62,9 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
quicklist_free(0, NULL, pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
{
pgtable_page_dtor(ptepage);
quicklist_free_page(0, NULL, ptepage);
}
@ -64,6 +72,7 @@ static inline void pte_free(struct mm_struct *mm, struct page *ptepage)
#define pmd_populate_kernel(MM, PMD, PTE) pmd_set(PMD, PTE)
#define pmd_populate(MM,PMD,PTE_PAGE) \
pmd_populate_kernel(MM,PMD,page_address(PTE_PAGE))
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void check_pgt_cache(void)
{

2
include/asm-um/page.h
View File

@ -79,6 +79,8 @@ typedef unsigned long phys_t;
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pgd_val(x) ((x).pgd)
#define pgprot_val(x) ((x).pgprot)

12
include/asm-um/pgalloc.h
View File

@ -18,6 +18,7 @@
set_pmd(pmd, __pmd(_PAGE_TABLE + \
((unsigned long long)page_to_pfn(pte) << \
(unsigned long long) PAGE_SHIFT)))
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@ -26,19 +27,24 @@ extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long) pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor(pte); \
tlb_remove_page((tlb),(pte)); \
} while (0)
#ifdef CONFIG_3_LEVEL_PGTABLES

2
include/asm-x86/page_32.h
View File

@ -50,6 +50,8 @@ typedef unsigned long phys_addr_t;
typedef union { pteval_t pte, pte_low; } pte_t;
typedef pte_t boot_pte_t;
typedef struct page *pgtable_t;
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_X86_PAE */

2
include/asm-x86/page_64.h
View File

@ -71,6 +71,8 @@ typedef unsigned long pgdval_t;
typedef unsigned long pgprotval_t;
typedef unsigned long phys_addr_t;
typedef struct page *pgtable_t;
typedef struct { pteval_t pte; } pte_t;
#define vmemmap ((struct page *)VMEMMAP_START)

6
include/asm-x86/pgalloc_32.h
View File

@ -31,6 +31,7 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *p
paravirt_alloc_pt(mm, pfn);
set_pmd(pmd, __pmd(((pteval_t)pfn << PAGE_SHIFT) | _PAGE_TABLE));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
/*
* Allocate and free page tables.
@ -39,15 +40,16 @@ extern pgd_t *pgd_alloc(struct mm_struct *);
extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}

22
include/asm-x86/pgalloc_64.h
View File

@ -12,6 +12,8 @@
#define pgd_populate(mm, pgd, pud) \
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)))
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
{
set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
@ -91,12 +93,17 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long ad
return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
struct page *page;
void *p;
p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
if (!p)
return NULL;
return virt_to_page(p);
page = virt_to_page(p);
pgtable_page_ctor(page);
return page;
}
/* Should really implement gc for free page table pages. This could be
@ -108,12 +115,17 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
free_page((unsigned long)pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *pte)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
pgtable_page_dtor(pte);
__free_page(pte);
}
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
#define __pte_free_tlb(tlb,pte) \
do { \
pgtable_page_dtor((pte)); \
tlb_remove_page((tlb), (pte)); \
} while (0)
#define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
#define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))

1
include/asm-xtensa/page.h
View File

@ -98,6 +98,7 @@
typedef struct { unsigned long pte; } pte_t; /* page table entry */
typedef struct { unsigned long pgd; } pgd_t; /* PGD table entry */
typedef struct { unsigned long pgprot; } pgprot_t;
typedef struct page *pgtable_t;
#define pte_val(x) ((x).pte)
#define pgd_val(x) ((x).pgd)

17
include/asm-xtensa/pgalloc.h
View File

@ -24,6 +24,7 @@
(pmd_val(*(pmdp)) = ((unsigned long)ptep))
#define pmd_populate(mm, pmdp, page) \
(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline pgd_t*
pgd_alloc(struct mm_struct *mm)
@ -46,10 +47,14 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);
}
static inline struct page *pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
static inline pte_token_t pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
{
return virt_to_page(pte_alloc_one_kernel(mm, addr));
struct page *page;
page = virt_to_page(pte_alloc_one_kernel(mm, addr));
pgtable_page_ctor(page);
return page;
}
static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
@ -57,10 +62,12 @@ static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
kmem_cache_free(pgtable_cache, pte);
}
static inline void pte_free(struct mm_struct *mm, struct page *page)
static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
{
kmem_cache_free(pgtable_cache, page_address(page));
pgtable_page_dtor(pte);
kmem_cache_free(pgtable_cache, page_address(pte));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
#endif /* __KERNEL__ */
#endif /* _XTENSA_PGALLOC_H */

14
include/linux/mm.h
View File

@ -894,6 +894,18 @@ static inline pmd_t *pmd_alloc(struct mm_struct *mm, pud_t *pud, unsigned long a
#define pte_lockptr(mm, pmd) ({(void)(pmd); &(mm)->page_table_lock;})
#endif /* NR_CPUS < CONFIG_SPLIT_PTLOCK_CPUS */
static inline void pgtable_page_ctor(struct page *page)
{
pte_lock_init(page);
inc_zone_page_state(page, NR_PAGETABLE);
}
static inline void pgtable_page_dtor(struct page *page)
{
pte_lock_deinit(page);
dec_zone_page_state(page, NR_PAGETABLE);
}
#define pte_offset_map_lock(mm, pmd, address, ptlp) \
({ \
spinlock_t *__ptl = pte_lockptr(mm, pmd); \
@ -1136,7 +1148,7 @@ struct page *follow_page(struct vm_area_struct *, unsigned long address,
#define FOLL_GET 0x04 /* do get_page on page */
#define FOLL_ANON 0x08 /* give ZERO_PAGE if no pgtable */
typedef int (*pte_fn_t)(pte_t *pte, struct page *pmd_page, unsigned long addr,
typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
void *data);
extern int apply_to_page_range(struct mm_struct *mm, unsigned long address,
unsigned long size, pte_fn_t fn, void *data);

32
mm/memory.c
View File

@ -134,11 +134,9 @@ void pmd_clear_bad(pmd_t *pmd)
*/
static void free_pte_range(struct mmu_gather *tlb, pmd_t *pmd)
{
struct page *page = pmd_page(*pmd);
pgtable_t token = pmd_pgtable(*pmd);
pmd_clear(pmd);
pte_lock_deinit(page);
pte_free_tlb(tlb, page);
dec_zone_page_state(page, NR_PAGETABLE);
pte_free_tlb(tlb, token);
tlb->mm->nr_ptes--;
}
@ -309,21 +307,19 @@ void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *vma,
int __pte_alloc(struct mm_struct *mm, pmd_t *pmd, unsigned long address)
{
struct page *new = pte_alloc_one(mm, address);
pgtable_t new = pte_alloc_one(mm, address);
if (!new)
return -ENOMEM;
pte_lock_init(new);
spin_lock(&mm->page_table_lock);
if (pmd_present(*pmd)) { /* Another has populated it */
pte_lock_deinit(new);
pte_free(mm, new);
} else {
if (!pmd_present(*pmd)) { /* Has another populated it ? */
mm->nr_ptes++;
inc_zone_page_state(new, NR_PAGETABLE);
pmd_populate(mm, pmd, new);
new = NULL;
}
spin_unlock(&mm->page_table_lock);
if (new)
pte_free(mm, new);
return 0;
}
@ -334,11 +330,13 @@ int __pte_alloc_kernel(pmd_t *pmd, unsigned long address)
return -ENOMEM;
spin_lock(&init_mm.page_table_lock);
if (pmd_present(*pmd)) /* Another has populated it */
pte_free_kernel(&init_mm, new);
else
if (!pmd_present(*pmd)) { /* Has another populated it ? */
pmd_populate_kernel(&init_mm, pmd, new);
new = NULL;
}
spin_unlock(&init_mm.page_table_lock);
if (new)
pte_free_kernel(&init_mm, new);
return 0;
}
@ -1390,7 +1388,7 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
{
pte_t *pte;
int err;
struct page *pmd_page;
pgtable_t token;
spinlock_t *uninitialized_var(ptl);
pte = (mm == &init_mm) ?
@ -1401,10 +1399,10 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
BUG_ON(pmd_huge(*pmd));
pmd_page = pmd_page(*pmd);
token = pmd_pgtable(*pmd);
do {
err = fn(pte, pmd_page, addr, data);
err = fn(pte, token, addr, data);
if (err)
break;
} while (pte++, addr += PAGE_SIZE, addr != end);

2
mm/vmalloc.c
View File

@ -820,7 +820,7 @@ void __attribute__((weak)) vmalloc_sync_all(void)
}
static int f(pte_t *pte, struct page *pmd_page, unsigned long addr, void *data)
static int f(pte_t *pte, pgtable_t table, unsigned long addr, void *data)
{
/* apply_to_page_range() does all the hard work. */
return 0;