LCOV - code coverage report
Current view: top level - lkbce/arch/x86/include/asm - pgtable_types.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 2 2 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          Line data    Source code
       1             : #ifndef _ASM_X86_PGTABLE_DEFS_H
       2             : #define _ASM_X86_PGTABLE_DEFS_H
       3             : 
       4             : #include <linux/const.h>
       5             : #include <asm/page_types.h>
       6             : 
       7             : #define FIRST_USER_ADDRESS      0
       8             : 
       9             : #define _PAGE_BIT_PRESENT       0       /* is present */
      10             : #define _PAGE_BIT_RW            1       /* writeable */
      11             : #define _PAGE_BIT_USER          2       /* userspace addressable */
      12             : #define _PAGE_BIT_PWT           3       /* page write through */
      13             : #define _PAGE_BIT_PCD           4       /* page cache disabled */
      14             : #define _PAGE_BIT_ACCESSED      5       /* was accessed (raised by CPU) */
      15             : #define _PAGE_BIT_DIRTY         6       /* was written to (raised by CPU) */
      16             : #define _PAGE_BIT_PSE           7       /* 4 MB (or 2MB) page */
      17             : #define _PAGE_BIT_PAT           7       /* on 4KB pages */
      18             : #define _PAGE_BIT_GLOBAL        8       /* Global TLB entry PPro+ */
      19             : #define _PAGE_BIT_UNUSED1       9       /* available for programmer */
      20             : #define _PAGE_BIT_IOMAP         10      /* flag used to indicate IO mapping */
      21             : #define _PAGE_BIT_HIDDEN        11      /* hidden by kmemcheck */
      22             : #define _PAGE_BIT_PAT_LARGE     12      /* On 2MB or 1GB pages */
      23             : #define _PAGE_BIT_SPECIAL       _PAGE_BIT_UNUSED1
      24             : #define _PAGE_BIT_CPA_TEST      _PAGE_BIT_UNUSED1
      25             : #define _PAGE_BIT_NX           63       /* No execute: only valid after cpuid check */
      26             : 
      27             : /* If _PAGE_BIT_PRESENT is clear, we use these: */
      28             : /* - if the user mapped it with PROT_NONE; pte_present gives true */
      29             : #define _PAGE_BIT_PROTNONE      _PAGE_BIT_GLOBAL
      30             : /* - set: nonlinear file mapping, saved PTE; unset:swap */
      31             : #define _PAGE_BIT_FILE          _PAGE_BIT_DIRTY
      32             : 
      33             : #define _PAGE_PRESENT   (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT)
      34             : #define _PAGE_RW        (_AT(pteval_t, 1) << _PAGE_BIT_RW)
      35             : #define _PAGE_USER      (_AT(pteval_t, 1) << _PAGE_BIT_USER)
      36             : #define _PAGE_PWT       (_AT(pteval_t, 1) << _PAGE_BIT_PWT)
      37             : #define _PAGE_PCD       (_AT(pteval_t, 1) << _PAGE_BIT_PCD)
      38             : #define _PAGE_ACCESSED  (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED)
      39             : #define _PAGE_DIRTY     (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY)
      40             : #define _PAGE_PSE       (_AT(pteval_t, 1) << _PAGE_BIT_PSE)
      41             : #define _PAGE_GLOBAL    (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
      42             : #define _PAGE_UNUSED1   (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
      43             : #define _PAGE_IOMAP     (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
      44             : #define _PAGE_PAT       (_AT(pteval_t, 1) << _PAGE_BIT_PAT)
      45             : #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
      46             : #define _PAGE_SPECIAL   (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
      47             : #define _PAGE_CPA_TEST  (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
      48             : #define __HAVE_ARCH_PTE_SPECIAL
      49             : 
      50             : #ifdef CONFIG_KMEMCHECK
      51             : #define _PAGE_HIDDEN    (_AT(pteval_t, 1) << _PAGE_BIT_HIDDEN)
      52             : #else
      53             : #define _PAGE_HIDDEN    (_AT(pteval_t, 0))
      54             : #endif
      55             : 
      56             : #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
      57             : #define _PAGE_NX        (_AT(pteval_t, 1) << _PAGE_BIT_NX)
      58             : #else
      59             : #define _PAGE_NX        (_AT(pteval_t, 0))
      60             : #endif
      61             : 
      62             : #define _PAGE_FILE      (_AT(pteval_t, 1) << _PAGE_BIT_FILE)
      63             : #define _PAGE_PROTNONE  (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
      64             : 
      65             : #define _PAGE_TABLE     (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |        \
      66             :                          _PAGE_ACCESSED | _PAGE_DIRTY)
      67             : #define _KERNPG_TABLE   (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED |    \
      68             :                          _PAGE_DIRTY)
      69             : 
      70             : /* Set of bits not changed in pte_modify */
      71             : #define _PAGE_CHG_MASK  (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT |         \
      72             :                          _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
      73             : 
      74             : #define _PAGE_CACHE_MASK        (_PAGE_PCD | _PAGE_PWT)
      75             : #define _PAGE_CACHE_WB          (0)
      76             : #define _PAGE_CACHE_WC          (_PAGE_PWT)
      77             : #define _PAGE_CACHE_UC_MINUS    (_PAGE_PCD)
      78             : #define _PAGE_CACHE_UC          (_PAGE_PCD | _PAGE_PWT)
      79             : 
      80             : #define PAGE_NONE       __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
      81             : #define PAGE_SHARED     __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
      82             :                                  _PAGE_ACCESSED | _PAGE_NX)
      83             : 
      84             : #define PAGE_SHARED_EXEC        __pgprot(_PAGE_PRESENT | _PAGE_RW |     \
      85             :                                          _PAGE_USER | _PAGE_ACCESSED)
      86             : #define PAGE_COPY_NOEXEC        __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
      87             :                                          _PAGE_ACCESSED | _PAGE_NX)
      88             : #define PAGE_COPY_EXEC          __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
      89             :                                          _PAGE_ACCESSED)
      90             : #define PAGE_COPY               PAGE_COPY_NOEXEC
      91             : #define PAGE_READONLY           __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
      92             :                                          _PAGE_ACCESSED | _PAGE_NX)
      93             : #define PAGE_READONLY_EXEC      __pgprot(_PAGE_PRESENT | _PAGE_USER |   \
      94             :                                          _PAGE_ACCESSED)
      95             : 
      96             : #define __PAGE_KERNEL_EXEC                                              \
      97             :         (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
      98             : #define __PAGE_KERNEL           (__PAGE_KERNEL_EXEC | _PAGE_NX)
      99             : 
     100             : #define __PAGE_KERNEL_RO                (__PAGE_KERNEL & ~_PAGE_RW)
     101             : #define __PAGE_KERNEL_RX                (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
     102             : #define __PAGE_KERNEL_EXEC_NOCACHE      (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
     103             : #define __PAGE_KERNEL_WC                (__PAGE_KERNEL | _PAGE_CACHE_WC)
     104             : #define __PAGE_KERNEL_NOCACHE           (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
     105             : #define __PAGE_KERNEL_UC_MINUS          (__PAGE_KERNEL | _PAGE_PCD)
     106             : #define __PAGE_KERNEL_VSYSCALL          (__PAGE_KERNEL_RX | _PAGE_USER)
     107             : #define __PAGE_KERNEL_VSYSCALL_NOCACHE  (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT)
     108             : #define __PAGE_KERNEL_LARGE             (__PAGE_KERNEL | _PAGE_PSE)
     109             : #define __PAGE_KERNEL_LARGE_NOCACHE     (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
     110             : #define __PAGE_KERNEL_LARGE_EXEC        (__PAGE_KERNEL_EXEC | _PAGE_PSE)
     111             : 
     112             : #define __PAGE_KERNEL_IO                (__PAGE_KERNEL | _PAGE_IOMAP)
     113             : #define __PAGE_KERNEL_IO_NOCACHE        (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
     114             : #define __PAGE_KERNEL_IO_UC_MINUS       (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
     115             : #define __PAGE_KERNEL_IO_WC             (__PAGE_KERNEL_WC | _PAGE_IOMAP)
     116             : 
     117             : #define PAGE_KERNEL                     __pgprot(__PAGE_KERNEL)
     118             : #define PAGE_KERNEL_RO                  __pgprot(__PAGE_KERNEL_RO)
     119             : #define PAGE_KERNEL_EXEC                __pgprot(__PAGE_KERNEL_EXEC)
     120             : #define PAGE_KERNEL_RX                  __pgprot(__PAGE_KERNEL_RX)
     121             : #define PAGE_KERNEL_WC                  __pgprot(__PAGE_KERNEL_WC)
     122             : #define PAGE_KERNEL_NOCACHE             __pgprot(__PAGE_KERNEL_NOCACHE)
     123             : #define PAGE_KERNEL_UC_MINUS            __pgprot(__PAGE_KERNEL_UC_MINUS)
     124             : #define PAGE_KERNEL_EXEC_NOCACHE        __pgprot(__PAGE_KERNEL_EXEC_NOCACHE)
     125             : #define PAGE_KERNEL_LARGE               __pgprot(__PAGE_KERNEL_LARGE)
     126             : #define PAGE_KERNEL_LARGE_NOCACHE       __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
     127             : #define PAGE_KERNEL_LARGE_EXEC          __pgprot(__PAGE_KERNEL_LARGE_EXEC)
     128             : #define PAGE_KERNEL_VSYSCALL            __pgprot(__PAGE_KERNEL_VSYSCALL)
     129             : #define PAGE_KERNEL_VSYSCALL_NOCACHE    __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
     130             : 
     131             : #define PAGE_KERNEL_IO                  __pgprot(__PAGE_KERNEL_IO)
     132             : #define PAGE_KERNEL_IO_NOCACHE          __pgprot(__PAGE_KERNEL_IO_NOCACHE)
     133             : #define PAGE_KERNEL_IO_UC_MINUS         __pgprot(__PAGE_KERNEL_IO_UC_MINUS)
     134             : #define PAGE_KERNEL_IO_WC               __pgprot(__PAGE_KERNEL_IO_WC)
     135             : 
     136             : /*         xwr */
     137             : #define __P000  PAGE_NONE
     138             : #define __P001  PAGE_READONLY
     139             : #define __P010  PAGE_COPY
     140             : #define __P011  PAGE_COPY
     141             : #define __P100  PAGE_READONLY_EXEC
     142             : #define __P101  PAGE_READONLY_EXEC
     143             : #define __P110  PAGE_COPY_EXEC
     144             : #define __P111  PAGE_COPY_EXEC
     145             : 
     146             : #define __S000  PAGE_NONE
     147             : #define __S001  PAGE_READONLY
     148             : #define __S010  PAGE_SHARED
     149             : #define __S011  PAGE_SHARED
     150             : #define __S100  PAGE_READONLY_EXEC
     151             : #define __S101  PAGE_READONLY_EXEC
     152             : #define __S110  PAGE_SHARED_EXEC
     153             : #define __S111  PAGE_SHARED_EXEC
     154             : 
     155             : /*
     156             :  * early identity mapping  pte attrib macros.
     157             :  */
     158             : #ifdef CONFIG_X86_64
     159             : #define __PAGE_KERNEL_IDENT_LARGE_EXEC  __PAGE_KERNEL_LARGE_EXEC
     160             : #else
     161             : /*
     162             :  * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection
     163             :  * bits are combined, this will alow user to access the high address mapped
     164             :  * VDSO in the presence of CONFIG_COMPAT_VDSO
     165             :  */
     166             : #define PTE_IDENT_ATTR   0x003          /* PRESENT+RW */
     167             : #define PDE_IDENT_ATTR   0x067          /* PRESENT+RW+USER+DIRTY+ACCESSED */
     168             : #define PGD_IDENT_ATTR   0x001          /* PRESENT (no other attributes) */
     169             : #endif
     170             : 
     171             : #ifdef CONFIG_X86_32
     172             : # include "pgtable_32_types.h"
     173             : #else
     174             : # include "pgtable_64_types.h"
     175             : #endif
     176             : 
     177             : #ifndef __ASSEMBLY__
     178             : 
     179             : #include <linux/types.h>
     180             : 
     181             : /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
     182             : #define PTE_PFN_MASK            ((pteval_t)PHYSICAL_PAGE_MASK)
     183             : 
     184             : /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
     185             : #define PTE_FLAGS_MASK          (~PTE_PFN_MASK)
     186             : 
     187             : typedef struct pgprot { pgprotval_t pgprot; } pgprot_t;
     188             : 
     189             : typedef struct { pgdval_t pgd; } pgd_t;
     190             : 
     191             : static inline pgd_t native_make_pgd(pgdval_t val)
     192             : {
     193             :         return (pgd_t) { val };
     194             : }
     195             : 
     196             : static inline pgdval_t native_pgd_val(pgd_t pgd)
     197             : {
     198             :         return pgd.pgd;
     199             : }
     200             : 
     201             : static inline pgdval_t pgd_flags(pgd_t pgd)
     202             : {
     203             :         return native_pgd_val(pgd) & PTE_FLAGS_MASK;
     204             : }
     205             : 
     206             : #if PAGETABLE_LEVELS > 3
     207             : typedef struct { pudval_t pud; } pud_t;
     208             : 
     209             : static inline pud_t native_make_pud(pmdval_t val)
     210             : {
     211             :         return (pud_t) { val };
     212             : }
     213             : 
     214             : static inline pudval_t native_pud_val(pud_t pud)
     215             : {
     216             :         return pud.pud;
     217             : }
     218             : #else
     219             : #include <asm-generic/pgtable-nopud.h>
     220             : 
     221             : static inline pudval_t native_pud_val(pud_t pud)
     222             : {
     223             :         return native_pgd_val(pud.pgd);
     224             : }
     225             : #endif
     226             : 
     227             : #if PAGETABLE_LEVELS > 2
     228             : typedef struct { pmdval_t pmd; } pmd_t;
     229             : 
     230             : static inline pmd_t native_make_pmd(pmdval_t val)
     231             : {
     232             :         return (pmd_t) { val };
     233             : }
     234             : 
     235             : static inline pmdval_t native_pmd_val(pmd_t pmd)
     236             : {
     237             :         return pmd.pmd;
     238             : }
     239             : #else
     240             : #include <asm-generic/pgtable-nopmd.h>
     241             : 
     242             : static inline pmdval_t native_pmd_val(pmd_t pmd)
     243             : {
     244             :         return native_pgd_val(pmd.pud.pgd);
     245             : }
     246             : #endif
     247             : 
     248             : static inline pudval_t pud_flags(pud_t pud)
     249             : {
     250             :         return native_pud_val(pud) & PTE_FLAGS_MASK;
     251             : }
     252             : 
     253             : static inline pmdval_t pmd_flags(pmd_t pmd)
     254             : {
     255             :         return native_pmd_val(pmd) & PTE_FLAGS_MASK;
     256             : }
     257             : 
     258             : static inline pte_t native_make_pte(pteval_t val)
     259             : {
     260             :         return (pte_t) { .pte = val };
     261             : }
     262             : 
     263             : static inline pteval_t native_pte_val(pte_t pte)
     264             : {
     265             :         return pte.pte;
     266             : }
     267             : 
     268             : static inline pteval_t pte_flags(pte_t pte)
     269             : {
     270             :         return native_pte_val(pte) & PTE_FLAGS_MASK;
     271             : }
     272             : 
     273             : #define pgprot_val(x)   ((x).pgprot)
     274             : #define __pgprot(x)     ((pgprot_t) { (x) } )
     275             : 
     276             : 
     277             : typedef struct page *pgtable_t;
     278             : 
     279             : extern pteval_t __supported_pte_mask;
     280             : extern void set_nx(void);
     281             : extern int nx_enabled;
     282             : 
     283             : #define pgprot_writecombine     pgprot_writecombine
     284             : extern pgprot_t pgprot_writecombine(pgprot_t prot);
     285           1 : 
     286             : /* Indicate that x86 has its own track and untrack pfn vma functions */
     287             : #define __HAVE_PFNMAP_TRACKING
     288             : 
     289             : #define __HAVE_PHYS_MEM_ACCESS_PROT
     290             : struct file;
     291             : pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
     292             :                               unsigned long size, pgprot_t vma_prot);
     293             : int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
     294             :                               unsigned long size, pgprot_t *vma_prot);
     295             : 
     296             : /* Install a pte for a particular vaddr in kernel space. */
     297             : void set_pte_vaddr(unsigned long vaddr, pte_t pte);
     298           1 : 
     299             : #ifdef CONFIG_X86_32
     300             : extern void native_pagetable_setup_start(pgd_t *base);
     301             : extern void native_pagetable_setup_done(pgd_t *base);
     302             : #else
     303             : #define native_pagetable_setup_start x86_init_pgd_noop
     304             : #define native_pagetable_setup_done  x86_init_pgd_noop
     305             : #endif
     306             : 
     307             : struct seq_file;
     308             : extern void arch_report_meminfo(struct seq_file *m);
     309             : 
     310             : enum {
     311             :         PG_LEVEL_NONE,
     312             :         PG_LEVEL_4K,
     313             :         PG_LEVEL_2M,
     314             :         PG_LEVEL_1G,
     315             :         PG_LEVEL_NUM
     316             : };
     317             : 
     318             : #ifdef CONFIG_PROC_FS
     319             : extern void update_page_count(int level, unsigned long pages);
     320             : #else
     321             : static inline void update_page_count(int level, unsigned long pages) { }
     322             : #endif
     323             : 
     324             : /*
     325             :  * Helper function that returns the kernel pagetable entry controlling
     326             :  * the virtual address 'address'. NULL means no pagetable entry present.
     327             :  * NOTE: the return type is pte_t but if the pmd is PSE then we return it
     328             :  * as a pte too.
     329             :  */
     330             : extern pte_t *lookup_address(unsigned long address, unsigned int *level);
     331             : 
     332             : #endif  /* !__ASSEMBLY__ */
     333             : 
     334             : #endif /* _ASM_X86_PGTABLE_DEFS_H */

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