diff options
Diffstat (limited to 'include/asm-x86/pgtable.h')
| -rw-r--r-- | include/asm-x86/pgtable.h | 251 |
1 files changed, 180 insertions, 71 deletions
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h index 9cf472aeb9ce..801b31f71452 100644 --- a/include/asm-x86/pgtable.h +++ b/include/asm-x86/pgtable.h @@ -1,16 +1,15 @@ #ifndef _ASM_X86_PGTABLE_H #define _ASM_X86_PGTABLE_H -#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) #define FIRST_USER_ADDRESS 0 -#define _PAGE_BIT_PRESENT 0 -#define _PAGE_BIT_RW 1 -#define _PAGE_BIT_USER 2 -#define _PAGE_BIT_PWT 3 -#define _PAGE_BIT_PCD 4 -#define _PAGE_BIT_ACCESSED 5 -#define _PAGE_BIT_DIRTY 6 +#define _PAGE_BIT_PRESENT 0 /* is present */ +#define _PAGE_BIT_RW 1 /* writeable */ +#define _PAGE_BIT_USER 2 /* userspace addressable */ +#define _PAGE_BIT_PWT 3 /* page write through */ +#define _PAGE_BIT_PCD 4 /* page cache disabled */ +#define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ +#define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ #define _PAGE_BIT_FILE 6 #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ #define _PAGE_BIT_PAT 7 /* on 4KB pages */ @@ -48,24 +47,39 @@ #endif /* If _PAGE_PRESENT is clear, we use these: */ -#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, saved PTE; unset:swap */ +#define _PAGE_FILE _PAGE_DIRTY /* nonlinear file mapping, + * saved PTE; unset:swap */ #define _PAGE_PROTNONE _PAGE_PSE /* if the user mapped it with PROT_NONE; pte_present gives true */ -#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) -#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) +#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ + _PAGE_ACCESSED | _PAGE_DIRTY) +#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ + _PAGE_DIRTY) #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) -#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) -#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) +#define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) +#define _PAGE_CACHE_WB (0) +#define _PAGE_CACHE_WC (_PAGE_PWT) +#define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) +#define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) -#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) -#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) -#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) +#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) +#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ + _PAGE_ACCESSED | _PAGE_NX) + +#define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ + _PAGE_USER | _PAGE_ACCESSED) +#define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ + _PAGE_ACCESSED | _PAGE_NX) +#define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ + _PAGE_ACCESSED) #define PAGE_COPY PAGE_COPY_NOEXEC -#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) -#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) +#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ + _PAGE_ACCESSED | _PAGE_NX) +#define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ + _PAGE_ACCESSED) #ifdef CONFIG_X86_32 #define _PAGE_KERNEL_EXEC \ @@ -84,6 +98,7 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC; #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) +#define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) @@ -101,6 +116,7 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC; #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) #define PAGE_KERNEL_RX MAKE_GLOBAL(__PAGE_KERNEL_RX) +#define PAGE_KERNEL_WC MAKE_GLOBAL(__PAGE_KERNEL_WC) #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) #define PAGE_KERNEL_UC_MINUS MAKE_GLOBAL(__PAGE_KERNEL_UC_MINUS) #define PAGE_KERNEL_EXEC_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_EXEC_NOCACHE) @@ -134,7 +150,7 @@ extern pteval_t __PAGE_KERNEL, __PAGE_KERNEL_EXEC; * ZERO_PAGE is a global shared page that is always zero: used * for zero-mapped memory areas etc.. */ -extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; +extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) extern spinlock_t pgd_lock; @@ -144,30 +160,111 @@ extern struct list_head pgd_list; * The following only work if pte_present() is true. * Undefined behaviour if not.. */ -static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } -static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } -static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } -static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } -static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } -static inline int pte_global(pte_t pte) { return pte_val(pte) & _PAGE_GLOBAL; } -static inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_NX); } - -static inline int pmd_large(pmd_t pte) { - return (pmd_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) == - (_PAGE_PSE|_PAGE_PRESENT); +static inline int pte_dirty(pte_t pte) +{ + return pte_val(pte) & _PAGE_DIRTY; +} + +static inline int pte_young(pte_t pte) +{ + return pte_val(pte) & _PAGE_ACCESSED; } -static inline pte_t pte_mkclean(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); } -static inline pte_t pte_mkold(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); } -static inline pte_t pte_wrprotect(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_RW); } -static inline pte_t pte_mkexec(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_NX); } -static inline pte_t pte_mkdirty(pte_t pte) { return __pte(pte_val(pte) | _PAGE_DIRTY); } -static inline pte_t pte_mkyoung(pte_t pte) { return __pte(pte_val(pte) | _PAGE_ACCESSED); } -static inline pte_t pte_mkwrite(pte_t pte) { return __pte(pte_val(pte) | _PAGE_RW); } -static inline pte_t pte_mkhuge(pte_t pte) { return __pte(pte_val(pte) | _PAGE_PSE); } -static inline pte_t pte_clrhuge(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_PSE); } -static inline pte_t pte_mkglobal(pte_t pte) { return __pte(pte_val(pte) | _PAGE_GLOBAL); } -static inline pte_t pte_clrglobal(pte_t pte) { return __pte(pte_val(pte) & ~(pteval_t)_PAGE_GLOBAL); } +static inline int pte_write(pte_t pte) +{ + return pte_val(pte) & _PAGE_RW; +} + +static inline int pte_file(pte_t pte) +{ + return pte_val(pte) & _PAGE_FILE; +} + +static inline int pte_huge(pte_t pte) +{ + return pte_val(pte) & _PAGE_PSE; +} + +static inline int pte_global(pte_t pte) +{ + return pte_val(pte) & _PAGE_GLOBAL; +} + +static inline int pte_exec(pte_t pte) +{ + return !(pte_val(pte) & _PAGE_NX); +} + +static inline int pte_special(pte_t pte) +{ + return 0; +} + +static inline int pmd_large(pmd_t pte) +{ + return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == + (_PAGE_PSE | _PAGE_PRESENT); +} + +static inline pte_t pte_mkclean(pte_t pte) +{ + return __pte(pte_val(pte) & ~(pteval_t)_PAGE_DIRTY); +} + +static inline pte_t pte_mkold(pte_t pte) +{ + return __pte(pte_val(pte) & ~(pteval_t)_PAGE_ACCESSED); +} + +static inline pte_t pte_wrprotect(pte_t pte) +{ + return __pte(pte_val(pte) & ~(pteval_t)_PAGE_RW); +} + +static inline pte_t pte_mkexec(pte_t pte) +{ + return __pte(pte_val(pte) & ~(pteval_t)_PAGE_NX); +} + +static inline pte_t pte_mkdirty(pte_t pte) +{ + return __pte(pte_val(pte) | _PAGE_DIRTY); +} + +static inline pte_t pte_mkyoung(pte_t pte) +{ + return __pte(pte_val(pte) | _PAGE_ACCESSED); +} + +static inline pte_t pte_mkwrite(pte_t pte) +{ + return __pte(pte_val(pte) | _PAGE_RW); +} + +static inline pte_t pte_mkhuge(pte_t pte) +{ + return __pte(pte_val(pte) | _PAGE_PSE); +} + +static inline pte_t pte_clrhuge(pte_t pte) +{ + return __pte(pte_val(pte) & ~(pteval_t)_PAGE_PSE); +} + +static inline pte_t pte_mkglobal(pte_t pte) +{ + return __pte(pte_val(pte) | _PAGE_GLOBAL); +} + +static inline pte_t pte_clrglobal(pte_t pte) +{ + return __pte(pte_val(pte) & ~(pteval_t)_PAGE_GLOBAL); +} + +static inline pte_t pte_mkspecial(pte_t pte) +{ + return pte; +} extern pteval_t __supported_pte_mask; @@ -201,6 +298,15 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask) +#ifndef __ASSEMBLY__ +#define __HAVE_PHYS_MEM_ACCESS_PROT +struct file; +pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, + unsigned long size, pgprot_t vma_prot); +int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, + unsigned long size, pgprot_t *vma_prot); +#endif + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else /* !CONFIG_PARAVIRT */ @@ -242,6 +348,9 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) # include "pgtable_64.h" #endif +#define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) +#define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) + #ifndef __ASSEMBLY__ enum { @@ -301,40 +410,21 @@ static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, * 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 = entry; \ - pte_update_defer((vma)->vm_mm, (address), (ptep)); \ - flush_tlb_page(vma, address); \ - } \ - __changed; \ -}) +extern int ptep_set_access_flags(struct vm_area_struct *vma, + unsigned long address, pte_t *ptep, + pte_t entry, int dirty); #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); \ - if (__ret) \ - pte_update((vma)->vm_mm, addr, ptep); \ - __ret; \ -}) +extern int ptep_test_and_clear_young(struct vm_area_struct *vma, + unsigned long addr, pte_t *ptep); #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH -#define ptep_clear_flush_young(vma, address, ptep) \ -({ \ - int __young; \ - __young = ptep_test_and_clear_young((vma), (address), (ptep)); \ - if (__young) \ - flush_tlb_page(vma, address); \ - __young; \ -}) +extern int ptep_clear_flush_young(struct vm_area_struct *vma, + unsigned long address, pte_t *ptep); #define __HAVE_ARCH_PTEP_GET_AND_CLEAR -static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) +static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) { pte_t pte = native_ptep_get_and_clear(ptep); pte_update(mm, addr, ptep); @@ -342,7 +432,9 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, } #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL -static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) +static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, + unsigned long addr, pte_t *ptep, + int full) { pte_t pte; if (full) { @@ -358,12 +450,29 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long } #define __HAVE_ARCH_PTEP_SET_WRPROTECT -static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) +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); } +/* + * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); + * + * dst - pointer to pgd range anwhere on a pgd page + * src - "" + * count - the number of pgds to copy. + * + * dst and src can be on the same page, but the range must not overlap, + * and must not cross a page boundary. + */ +static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) +{ + memcpy(dst, src, count * sizeof(pgd_t)); +} + + #include <asm-generic/pgtable.h> #endif /* __ASSEMBLY__ */ |