diff options
Diffstat (limited to 'include/asm-x86/pgtable_64.h')
| -rw-r--r-- | include/asm-x86/pgtable_64.h | 267 |
1 files changed, 52 insertions, 215 deletions
diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h index 9b0ff477b39e..bd4740a60f29 100644 --- a/include/asm-x86/pgtable_64.h +++ b/include/asm-x86/pgtable_64.h @@ -17,22 +17,15 @@ extern pud_t level3_kernel_pgt[512]; extern pud_t level3_ident_pgt[512]; extern pmd_t level2_kernel_pgt[512]; extern pgd_t init_level4_pgt[]; -extern unsigned long __supported_pte_mask; #define swapper_pg_dir init_level4_pgt extern void paging_init(void); -extern void clear_kernel_mapping(unsigned long addr, unsigned long size); - -/* - * 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)]; -#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) #endif /* !__ASSEMBLY__ */ +#define SHARED_KERNEL_PMD 1 + /* * PGDIR_SHIFT determines what a top-level page table entry can map */ @@ -71,57 +64,68 @@ extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; #define pgd_none(x) (!pgd_val(x)) #define pud_none(x) (!pud_val(x)) -static inline void set_pte(pte_t *dst, pte_t val) +struct mm_struct; + +static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, + pte_t *ptep) { - pte_val(*dst) = pte_val(val); -} -#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) + *ptep = native_make_pte(0); +} + +static inline void native_set_pte(pte_t *ptep, pte_t pte) +{ + *ptep = pte; +} -static inline void set_pmd(pmd_t *dst, pmd_t val) +static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) { - pmd_val(*dst) = pmd_val(val); -} + native_set_pte(ptep, pte); +} -static inline void set_pud(pud_t *dst, pud_t val) +static inline pte_t native_ptep_get_and_clear(pte_t *xp) { - pud_val(*dst) = pud_val(val); +#ifdef CONFIG_SMP + return native_make_pte(xchg(&xp->pte, 0)); +#else + /* native_local_ptep_get_and_clear, but duplicated because of cyclic dependency */ + pte_t ret = *xp; + native_pte_clear(NULL, 0, xp); + return ret; +#endif } -static inline void pud_clear (pud_t *pud) +static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) { - set_pud(pud, __pud(0)); + *pmdp = pmd; } -static inline void set_pgd(pgd_t *dst, pgd_t val) +static inline void native_pmd_clear(pmd_t *pmd) { - pgd_val(*dst) = pgd_val(val); -} + native_set_pmd(pmd, native_make_pmd(0)); +} -static inline void pgd_clear (pgd_t * pgd) +static inline void native_set_pud(pud_t *pudp, pud_t pud) { - set_pgd(pgd, __pgd(0)); + *pudp = pud; } -#define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) +static inline void native_pud_clear(pud_t *pud) +{ + native_set_pud(pud, native_make_pud(0)); +} -struct mm_struct; +static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) +{ + *pgdp = pgd; +} -static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) +static inline void native_pgd_clear(pgd_t * pgd) { - pte_t pte; - if (full) { - pte = *ptep; - *ptep = __pte(0); - } else { - pte = ptep_get_and_clear(mm, addr, ptep); - } - return pte; + native_set_pgd(pgd, native_make_pgd(0)); } #define pte_same(a, b) ((a).pte == (b).pte) -#define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK)) - #endif /* !__ASSEMBLY__ */ #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) @@ -131,8 +135,6 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) #define PGDIR_MASK (~(PGDIR_SIZE-1)) -#define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) -#define FIRST_USER_ADDRESS 0 #define MAXMEM _AC(0x3fffffffffff, UL) #define VMALLOC_START _AC(0xffffc20000000000, UL) @@ -142,91 +144,6 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long #define MODULES_END _AC(0xfffffffffff00000, UL) #define MODULES_LEN (MODULES_END - MODULES_VADDR) -#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_PSE 7 /* 4 MB (or 2MB) page */ -#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ -#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ - -#define _PAGE_PRESENT 0x001 -#define _PAGE_RW 0x002 -#define _PAGE_USER 0x004 -#define _PAGE_PWT 0x008 -#define _PAGE_PCD 0x010 -#define _PAGE_ACCESSED 0x020 -#define _PAGE_DIRTY 0x040 -#define _PAGE_PSE 0x080 /* 2MB page */ -#define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ -#define _PAGE_GLOBAL 0x100 /* Global TLB entry */ - -#define _PAGE_PROTNONE 0x080 /* If not present */ -#define _PAGE_NX (_AC(1,UL)<<_PAGE_BIT_NX) - -#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_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 PAGE_COPY_NOEXEC -#define PAGE_COPY_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) -#define __PAGE_KERNEL \ - (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) -#define __PAGE_KERNEL_EXEC \ - (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) -#define __PAGE_KERNEL_NOCACHE \ - (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_PCD | _PAGE_ACCESSED | _PAGE_NX) -#define __PAGE_KERNEL_RO \ - (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) -#define __PAGE_KERNEL_VSYSCALL \ - (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) -#define __PAGE_KERNEL_VSYSCALL_NOCACHE \ - (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_PCD) -#define __PAGE_KERNEL_LARGE \ - (__PAGE_KERNEL | _PAGE_PSE) -#define __PAGE_KERNEL_LARGE_EXEC \ - (__PAGE_KERNEL_EXEC | _PAGE_PSE) - -#define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) - -#define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) -#define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) -#define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) -#define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) -#define PAGE_KERNEL_VSYSCALL32 __pgprot(__PAGE_KERNEL_VSYSCALL) -#define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) -#define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) -#define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) - -/* xwr */ -#define __P000 PAGE_NONE -#define __P001 PAGE_READONLY -#define __P010 PAGE_COPY -#define __P011 PAGE_COPY -#define __P100 PAGE_READONLY_EXEC -#define __P101 PAGE_READONLY_EXEC -#define __P110 PAGE_COPY_EXEC -#define __P111 PAGE_COPY_EXEC - -#define __S000 PAGE_NONE -#define __S001 PAGE_READONLY -#define __S010 PAGE_SHARED -#define __S011 PAGE_SHARED -#define __S100 PAGE_READONLY_EXEC -#define __S101 PAGE_READONLY_EXEC -#define __S110 PAGE_SHARED_EXEC -#define __S111 PAGE_SHARED_EXEC - #ifndef __ASSEMBLY__ static inline unsigned long pgd_bad(pgd_t pgd) @@ -246,66 +163,16 @@ static inline unsigned long pmd_bad(pmd_t pmd) #define pte_none(x) (!pte_val(x)) #define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE)) -#define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) -#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this - right? */ +#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this right? */ #define pte_page(x) pfn_to_page(pte_pfn(x)) #define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) -static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) -{ - pte_t pte; - pte_val(pte) = (page_nr << PAGE_SHIFT); - pte_val(pte) |= pgprot_val(pgprot); - pte_val(pte) &= __supported_pte_mask; - return pte; -} - -/* - * The following only work if pte_present() is true. - * Undefined behaviour if not.. - */ -#define __LARGE_PTE (_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 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 pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; } -static inline pte_t pte_mkold(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; } -static inline pte_t pte_wrprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; } -static inline pte_t pte_mkexec(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_NX)); return pte; } -static inline pte_t pte_mkdirty(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; } -static inline pte_t pte_mkyoung(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; } -static inline pte_t pte_mkwrite(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; } -static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_PSE)); return pte; } -static inline pte_t pte_clrhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_PSE)); return pte; } - -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, &ptep->pte); -} - -static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) -{ - clear_bit(_PAGE_BIT_RW, &ptep->pte); -} - /* * Macro to mark a page protection value as "uncacheable". */ #define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) -static inline int pmd_large(pmd_t pte) { - return (pmd_val(pte) & __LARGE_PTE) == __LARGE_PTE; -} - /* * Conversion functions: convert a page and protection to a page entry, @@ -331,6 +198,12 @@ static inline int pmd_large(pmd_t pte) { #define pud_offset(pgd, address) ((pud_t *) pgd_page_vaddr(*(pgd)) + pud_index(address)) #define pud_present(pud) (pud_val(pud) & _PAGE_PRESENT) +static inline int pud_large(pud_t pte) +{ + return (pud_val(pte) & (_PAGE_PSE|_PAGE_PRESENT)) == + (_PAGE_PSE|_PAGE_PRESENT); +} + /* PMD - Level 2 access */ #define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK)) #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) @@ -340,29 +213,18 @@ static inline int pmd_large(pmd_t pte) { pmd_index(address)) #define pmd_none(x) (!pmd_val(x)) #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) -#define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) #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 pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE }) #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT /* PTE - Level 1 access. */ /* page, protection -> pte */ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) -#define mk_pte_huge(entry) (pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE) -/* Change flags of a PTE */ -static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) -{ - pte_val(pte) &= _PAGE_CHG_MASK; - pte_val(pte) |= pgprot_val(newprot); - pte_val(pte) &= __supported_pte_mask; - return pte; -} - #define pte_index(address) \ (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \ @@ -376,40 +238,20 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #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 }) - -extern spinlock_t pgd_lock; -extern struct list_head pgd_list; +#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) extern int kern_addr_valid(unsigned long addr); -pte_t *lookup_address(unsigned long addr); - #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ remap_pfn_range(vma, vaddr, pfn, size, prot) #define HAVE_ARCH_UNMAPPED_AREA +#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN #define pgtable_cache_init() do { } while (0) #define check_pgt_cache() do { } while (0) @@ -422,12 +264,7 @@ 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_GET_AND_CLEAR -#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL -#define __HAVE_ARCH_PTEP_SET_WRPROTECT #define __HAVE_ARCH_PTE_SAME -#include <asm-generic/pgtable.h> #endif /* !__ASSEMBLY__ */ #endif /* _X86_64_PGTABLE_H */ |
