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 187typedef struct pgprot { pgprotval_t pgprot; } pgprot_t; 188 189typedef struct { pgdval_t pgd; } pgd_t; 190 191static inline pgd_t native_make_pgd(pgdval_t val) 192{ 193 return (pgd_t) { val }; 194} 195 196static inline pgdval_t native_pgd_val(pgd_t pgd) 197{ 198 return pgd.pgd; 199} 200 201static 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 207typedef struct { pudval_t pud; } pud_t; 208 209static inline pud_t native_make_pud(pmdval_t val) 210{ 211 return (pud_t) { val }; 212} 213 214static 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 221static 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 228typedef struct { pmdval_t pmd; } pmd_t; 229 230static inline pmd_t native_make_pmd(pmdval_t val) 231{ 232 return (pmd_t) { val }; 233} 234 235static 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 242static inline pmdval_t native_pmd_val(pmd_t pmd) 243{ 244 return native_pgd_val(pmd.pud.pgd); 245} 246#endif 247 248static inline pudval_t pud_flags(pud_t pud) 249{ 250 return native_pud_val(pud) & PTE_FLAGS_MASK; 251} 252 253static inline pmdval_t pmd_flags(pmd_t pmd) 254{ 255 return native_pmd_val(pmd) & PTE_FLAGS_MASK; 256} 257 258static inline pte_t native_make_pte(pteval_t val) 259{ 260 return (pte_t) { .pte = val }; 261} 262 263static inline pteval_t native_pte_val(pte_t pte) 264{ 265 return pte.pte; 266} 267 268static 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 277typedef struct page *pgtable_t; 278 279extern pteval_t __supported_pte_mask; 280extern void set_nx(void); 281extern int nx_enabled; 282 283#define pgprot_writecombine pgprot_writecombine 284extern pgprot_t pgprot_writecombine(pgprot_t prot); 285 286/* 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 290struct file; 291pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, 292 unsigned long size, pgprot_t vma_prot); 293int 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. */ 297void set_pte_vaddr(unsigned long vaddr, pte_t pte); 298 299#ifdef CONFIG_X86_32 300extern void native_pagetable_setup_start(pgd_t *base); 301extern 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 307struct seq_file; 308extern void arch_report_meminfo(struct seq_file *m); 309 310enum { 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 319extern void update_page_count(int level, unsigned long pages); 320#else 321static 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 */ 330extern pte_t *lookup_address(unsigned long address, unsigned int *level); 331 332#endif /* !__ASSEMBLY__ */ 333 334#endif /* _ASM_X86_PGTABLE_DEFS_H */ 335