H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 1 | #ifndef _ASM_X86_PGTABLE_H |
| 2 | #define _ASM_X86_PGTABLE_H |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 3 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 4 | #define FIRST_USER_ADDRESS 0 |
| 5 | |
Jiri Slaby | 43cdf5d | 2008-03-22 18:50:22 +0100 | [diff] [blame] | 6 | #define _PAGE_BIT_PRESENT 0 /* is present */ |
| 7 | #define _PAGE_BIT_RW 1 /* writeable */ |
| 8 | #define _PAGE_BIT_USER 2 /* userspace addressable */ |
| 9 | #define _PAGE_BIT_PWT 3 /* page write through */ |
| 10 | #define _PAGE_BIT_PCD 4 /* page cache disabled */ |
| 11 | #define _PAGE_BIT_ACCESSED 5 /* was accessed (raised by CPU) */ |
| 12 | #define _PAGE_BIT_DIRTY 6 /* was written to (raised by CPU) */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 13 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ |
Andi Kleen | 9bf5a47 | 2008-02-04 16:48:06 +0100 | [diff] [blame] | 14 | #define _PAGE_BIT_PAT 7 /* on 4KB pages */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 15 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ |
| 16 | #define _PAGE_BIT_UNUSED1 9 /* available for programmer */ |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 17 | #define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */ |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 18 | #define _PAGE_BIT_UNUSED3 11 |
Andi Kleen | 9bf5a47 | 2008-02-04 16:48:06 +0100 | [diff] [blame] | 19 | #define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */ |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 20 | #define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1 |
Jeremy Fitzhardinge | 110e035 | 2008-08-28 13:58:39 -0700 | [diff] [blame] | 21 | #define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1 |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 22 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ |
| 23 | |
Jan Beulich | 1796316 | 2008-12-16 11:35:24 +0000 | [diff] [blame] | 24 | /* If _PAGE_BIT_PRESENT is clear, we use these: */ |
| 25 | /* - if the user mapped it with PROT_NONE; pte_present gives true */ |
| 26 | #define _PAGE_BIT_PROTNONE _PAGE_BIT_GLOBAL |
| 27 | /* - set: nonlinear file mapping, saved PTE; unset:swap */ |
| 28 | #define _PAGE_BIT_FILE _PAGE_BIT_DIRTY |
| 29 | |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 30 | #define _PAGE_PRESENT (_AT(pteval_t, 1) << _PAGE_BIT_PRESENT) |
| 31 | #define _PAGE_RW (_AT(pteval_t, 1) << _PAGE_BIT_RW) |
| 32 | #define _PAGE_USER (_AT(pteval_t, 1) << _PAGE_BIT_USER) |
| 33 | #define _PAGE_PWT (_AT(pteval_t, 1) << _PAGE_BIT_PWT) |
| 34 | #define _PAGE_PCD (_AT(pteval_t, 1) << _PAGE_BIT_PCD) |
| 35 | #define _PAGE_ACCESSED (_AT(pteval_t, 1) << _PAGE_BIT_ACCESSED) |
| 36 | #define _PAGE_DIRTY (_AT(pteval_t, 1) << _PAGE_BIT_DIRTY) |
| 37 | #define _PAGE_PSE (_AT(pteval_t, 1) << _PAGE_BIT_PSE) |
| 38 | #define _PAGE_GLOBAL (_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL) |
| 39 | #define _PAGE_UNUSED1 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1) |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 40 | #define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP) |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 41 | #define _PAGE_UNUSED3 (_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3) |
| 42 | #define _PAGE_PAT (_AT(pteval_t, 1) << _PAGE_BIT_PAT) |
| 43 | #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE) |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 44 | #define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL) |
Jeremy Fitzhardinge | 110e035 | 2008-08-28 13:58:39 -0700 | [diff] [blame] | 45 | #define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST) |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 46 | #define __HAVE_ARCH_PTE_SPECIAL |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 47 | |
| 48 | #if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 49 | #define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 50 | #else |
Jeremy Fitzhardinge | 4226ab9 | 2008-05-26 23:30:58 +0100 | [diff] [blame] | 51 | #define _PAGE_NX (_AT(pteval_t, 0)) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 52 | #endif |
| 53 | |
Jan Beulich | 1796316 | 2008-12-16 11:35:24 +0000 | [diff] [blame] | 54 | #define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE) |
| 55 | #define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 56 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 57 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 58 | _PAGE_ACCESSED | _PAGE_DIRTY) |
| 59 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \ |
| 60 | _PAGE_DIRTY) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 61 | |
Jeremy Fitzhardinge | 86aaf4f | 2008-05-20 08:26:22 +0100 | [diff] [blame] | 62 | /* Set of bits not changed in pte_modify */ |
Jeremy Fitzhardinge | 59438c9 | 2008-07-21 22:59:42 -0700 | [diff] [blame] | 63 | #define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \ |
Nick Piggin | a0a8f53 | 2008-07-25 19:45:20 -0700 | [diff] [blame] | 64 | _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 65 | |
venkatesh.pallipadi@intel.com | 2e5d9c8 | 2008-03-18 17:00:14 -0700 | [diff] [blame] | 66 | #define _PAGE_CACHE_MASK (_PAGE_PCD | _PAGE_PWT) |
| 67 | #define _PAGE_CACHE_WB (0) |
| 68 | #define _PAGE_CACHE_WC (_PAGE_PWT) |
| 69 | #define _PAGE_CACHE_UC_MINUS (_PAGE_PCD) |
| 70 | #define _PAGE_CACHE_UC (_PAGE_PCD | _PAGE_PWT) |
| 71 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 72 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 73 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \ |
| 74 | _PAGE_ACCESSED | _PAGE_NX) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 75 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 76 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | \ |
| 77 | _PAGE_USER | _PAGE_ACCESSED) |
| 78 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 79 | _PAGE_ACCESSED | _PAGE_NX) |
| 80 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 81 | _PAGE_ACCESSED) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 82 | #define PAGE_COPY PAGE_COPY_NOEXEC |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 83 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 84 | _PAGE_ACCESSED | _PAGE_NX) |
| 85 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | \ |
| 86 | _PAGE_ACCESSED) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 87 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 88 | #define __PAGE_KERNEL_EXEC \ |
Jeremy Fitzhardinge | 8490638 | 2008-07-01 16:46:35 -0700 | [diff] [blame] | 89 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 90 | #define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 91 | |
| 92 | #define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW) |
| 93 | #define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW) |
Ingo Molnar | d2e626f | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 94 | #define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT) |
venkatesh.pallipadi@intel.com | b310f38 | 2008-03-18 17:00:24 -0700 | [diff] [blame] | 95 | #define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 96 | #define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT) |
Suresh Siddha | d546b67 | 2008-03-25 17:39:12 -0700 | [diff] [blame] | 97 | #define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 98 | #define __PAGE_KERNEL_VSYSCALL (__PAGE_KERNEL_RX | _PAGE_USER) |
| 99 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE (__PAGE_KERNEL_VSYSCALL | _PAGE_PCD | _PAGE_PWT) |
| 100 | #define __PAGE_KERNEL_LARGE (__PAGE_KERNEL | _PAGE_PSE) |
Jack Steiner | 3a9e189 | 2008-07-01 14:45:32 -0500 | [diff] [blame] | 101 | #define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 102 | #define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE) |
| 103 | |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 104 | #define __PAGE_KERNEL_IO (__PAGE_KERNEL | _PAGE_IOMAP) |
| 105 | #define __PAGE_KERNEL_IO_NOCACHE (__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP) |
| 106 | #define __PAGE_KERNEL_IO_UC_MINUS (__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP) |
| 107 | #define __PAGE_KERNEL_IO_WC (__PAGE_KERNEL_WC | _PAGE_IOMAP) |
| 108 | |
Jeremy Fitzhardinge | 8490638 | 2008-07-01 16:46:35 -0700 | [diff] [blame] | 109 | #define PAGE_KERNEL __pgprot(__PAGE_KERNEL) |
| 110 | #define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO) |
| 111 | #define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC) |
| 112 | #define PAGE_KERNEL_RX __pgprot(__PAGE_KERNEL_RX) |
| 113 | #define PAGE_KERNEL_WC __pgprot(__PAGE_KERNEL_WC) |
| 114 | #define PAGE_KERNEL_NOCACHE __pgprot(__PAGE_KERNEL_NOCACHE) |
| 115 | #define PAGE_KERNEL_UC_MINUS __pgprot(__PAGE_KERNEL_UC_MINUS) |
| 116 | #define PAGE_KERNEL_EXEC_NOCACHE __pgprot(__PAGE_KERNEL_EXEC_NOCACHE) |
| 117 | #define PAGE_KERNEL_LARGE __pgprot(__PAGE_KERNEL_LARGE) |
Jack Steiner | 3a9e189 | 2008-07-01 14:45:32 -0500 | [diff] [blame] | 118 | #define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE) |
Jeremy Fitzhardinge | 8490638 | 2008-07-01 16:46:35 -0700 | [diff] [blame] | 119 | #define PAGE_KERNEL_LARGE_EXEC __pgprot(__PAGE_KERNEL_LARGE_EXEC) |
| 120 | #define PAGE_KERNEL_VSYSCALL __pgprot(__PAGE_KERNEL_VSYSCALL) |
| 121 | #define PAGE_KERNEL_VSYSCALL_NOCACHE __pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE) |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 122 | |
Jeremy Fitzhardinge | be43d72 | 2008-09-07 15:21:13 -0700 | [diff] [blame] | 123 | #define PAGE_KERNEL_IO __pgprot(__PAGE_KERNEL_IO) |
| 124 | #define PAGE_KERNEL_IO_NOCACHE __pgprot(__PAGE_KERNEL_IO_NOCACHE) |
| 125 | #define PAGE_KERNEL_IO_UC_MINUS __pgprot(__PAGE_KERNEL_IO_UC_MINUS) |
| 126 | #define PAGE_KERNEL_IO_WC __pgprot(__PAGE_KERNEL_IO_WC) |
| 127 | |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 128 | /* xwr */ |
| 129 | #define __P000 PAGE_NONE |
| 130 | #define __P001 PAGE_READONLY |
| 131 | #define __P010 PAGE_COPY |
| 132 | #define __P011 PAGE_COPY |
| 133 | #define __P100 PAGE_READONLY_EXEC |
| 134 | #define __P101 PAGE_READONLY_EXEC |
| 135 | #define __P110 PAGE_COPY_EXEC |
| 136 | #define __P111 PAGE_COPY_EXEC |
| 137 | |
| 138 | #define __S000 PAGE_NONE |
| 139 | #define __S001 PAGE_READONLY |
| 140 | #define __S010 PAGE_SHARED |
| 141 | #define __S011 PAGE_SHARED |
| 142 | #define __S100 PAGE_READONLY_EXEC |
| 143 | #define __S101 PAGE_READONLY_EXEC |
| 144 | #define __S110 PAGE_SHARED_EXEC |
| 145 | #define __S111 PAGE_SHARED_EXEC |
| 146 | |
Suresh Siddha | b2bc273 | 2008-09-23 14:00:36 -0700 | [diff] [blame] | 147 | /* |
| 148 | * early identity mapping pte attrib macros. |
| 149 | */ |
| 150 | #ifdef CONFIG_X86_64 |
| 151 | #define __PAGE_KERNEL_IDENT_LARGE_EXEC __PAGE_KERNEL_LARGE_EXEC |
| 152 | #else |
Suresh Siddha | f61f1b5 | 2008-10-15 07:46:27 -0700 | [diff] [blame] | 153 | /* |
| 154 | * For PDE_IDENT_ATTR include USER bit. As the PDE and PTE protection |
| 155 | * bits are combined, this will alow user to access the high address mapped |
| 156 | * VDSO in the presence of CONFIG_COMPAT_VDSO |
| 157 | */ |
Suresh Siddha | 3a85e77 | 2008-09-23 14:00:37 -0700 | [diff] [blame] | 158 | #define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */ |
Suresh Siddha | f61f1b5 | 2008-10-15 07:46:27 -0700 | [diff] [blame] | 159 | #define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */ |
Suresh Siddha | b2bc273 | 2008-09-23 14:00:36 -0700 | [diff] [blame] | 160 | #define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */ |
| 161 | #endif |
| 162 | |
venkatesh.pallipadi@intel.com | 8a7b12f | 2008-12-18 11:41:31 -0800 | [diff] [blame] | 163 | /* |
| 164 | * Macro to mark a page protection value as UC- |
| 165 | */ |
| 166 | #define pgprot_noncached(prot) \ |
| 167 | ((boot_cpu_data.x86 > 3) \ |
| 168 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ |
| 169 | : (prot)) |
| 170 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 171 | #ifndef __ASSEMBLY__ |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 172 | |
venkatesh.pallipadi@intel.com | 2520bd3 | 2008-12-18 11:41:32 -0800 | [diff] [blame] | 173 | #define pgprot_writecombine pgprot_writecombine |
| 174 | extern pgprot_t pgprot_writecombine(pgprot_t prot); |
| 175 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 176 | /* |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 177 | * ZERO_PAGE is a global shared page that is always zero: used |
| 178 | * for zero-mapped memory areas etc.. |
| 179 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 180 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 181 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
| 182 | |
Jeremy Fitzhardinge | e3ed910 | 2008-01-30 13:34:11 +0100 | [diff] [blame] | 183 | extern spinlock_t pgd_lock; |
| 184 | extern struct list_head pgd_list; |
Jeremy Fitzhardinge | 8405b12 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 185 | |
| 186 | /* |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 187 | * The following only work if pte_present() is true. |
| 188 | * Undefined behaviour if not.. |
| 189 | */ |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 190 | static inline int pte_dirty(pte_t pte) |
| 191 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 192 | return pte_flags(pte) & _PAGE_DIRTY; |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 193 | } |
| 194 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 195 | static inline int pte_young(pte_t pte) |
| 196 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 197 | return pte_flags(pte) & _PAGE_ACCESSED; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | static inline int pte_write(pte_t pte) |
| 201 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 202 | return pte_flags(pte) & _PAGE_RW; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 203 | } |
| 204 | |
| 205 | static inline int pte_file(pte_t pte) |
| 206 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 207 | return pte_flags(pte) & _PAGE_FILE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | static inline int pte_huge(pte_t pte) |
| 211 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 212 | return pte_flags(pte) & _PAGE_PSE; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 213 | } |
| 214 | |
| 215 | static inline int pte_global(pte_t pte) |
| 216 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 217 | return pte_flags(pte) & _PAGE_GLOBAL; |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static inline int pte_exec(pte_t pte) |
| 221 | { |
Jeremy Fitzhardinge | a15af1c | 2008-05-26 23:31:06 +0100 | [diff] [blame] | 222 | return !(pte_flags(pte) & _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 223 | } |
| 224 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 225 | static inline int pte_special(pte_t pte) |
| 226 | { |
Jan Beulich | 606ee44 | 2008-09-17 16:48:17 +0100 | [diff] [blame] | 227 | return pte_flags(pte) & _PAGE_SPECIAL; |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 228 | } |
| 229 | |
Hugh Dickins | 91030ca | 2008-09-09 16:42:45 +0100 | [diff] [blame] | 230 | static inline unsigned long pte_pfn(pte_t pte) |
| 231 | { |
| 232 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
| 233 | } |
| 234 | |
| 235 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
| 236 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 237 | static inline int pmd_large(pmd_t pte) |
| 238 | { |
| 239 | return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
| 240 | (_PAGE_PSE | _PAGE_PRESENT); |
| 241 | } |
| 242 | |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 243 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
| 244 | { |
| 245 | pteval_t v = native_pte_val(pte); |
| 246 | |
| 247 | return native_make_pte(v | set); |
| 248 | } |
| 249 | |
| 250 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
| 251 | { |
| 252 | pteval_t v = native_pte_val(pte); |
| 253 | |
| 254 | return native_make_pte(v & ~clear); |
| 255 | } |
| 256 | |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 257 | static inline pte_t pte_mkclean(pte_t pte) |
| 258 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 259 | return pte_clear_flags(pte, _PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | static inline pte_t pte_mkold(pte_t pte) |
| 263 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 264 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | static inline pte_t pte_wrprotect(pte_t pte) |
| 268 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 269 | return pte_clear_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 270 | } |
| 271 | |
| 272 | static inline pte_t pte_mkexec(pte_t pte) |
| 273 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 274 | return pte_clear_flags(pte, _PAGE_NX); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 275 | } |
| 276 | |
| 277 | static inline pte_t pte_mkdirty(pte_t pte) |
| 278 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 279 | return pte_set_flags(pte, _PAGE_DIRTY); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | static inline pte_t pte_mkyoung(pte_t pte) |
| 283 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 284 | return pte_set_flags(pte, _PAGE_ACCESSED); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | static inline pte_t pte_mkwrite(pte_t pte) |
| 288 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 289 | return pte_set_flags(pte, _PAGE_RW); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 290 | } |
| 291 | |
| 292 | static inline pte_t pte_mkhuge(pte_t pte) |
| 293 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 294 | return pte_set_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | static inline pte_t pte_clrhuge(pte_t pte) |
| 298 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 299 | return pte_clear_flags(pte, _PAGE_PSE); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 300 | } |
| 301 | |
| 302 | static inline pte_t pte_mkglobal(pte_t pte) |
| 303 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 304 | return pte_set_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | static inline pte_t pte_clrglobal(pte_t pte) |
| 308 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 309 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 310 | } |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 311 | |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 312 | static inline pte_t pte_mkspecial(pte_t pte) |
| 313 | { |
Jeremy Fitzhardinge | 6522869 | 2009-01-22 14:24:22 -0800 | [diff] [blame] | 314 | return pte_set_flags(pte, _PAGE_SPECIAL); |
Nick Piggin | 7e67513 | 2008-04-28 02:13:00 -0700 | [diff] [blame] | 315 | } |
| 316 | |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 317 | extern pteval_t __supported_pte_mask; |
| 318 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 319 | /* |
| 320 | * Mask out unsupported bits in a present pgprot. Non-present pgprots |
| 321 | * can use those bits for other purposes, so leave them be. |
| 322 | */ |
| 323 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
| 324 | { |
| 325 | pgprotval_t protval = pgprot_val(pgprot); |
| 326 | |
| 327 | if (protval & _PAGE_PRESENT) |
| 328 | protval &= __supported_pte_mask; |
| 329 | |
| 330 | return protval; |
| 331 | } |
| 332 | |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 333 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
| 334 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 335 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 336 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
| 340 | { |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 341 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
| 342 | massage_pgprot(pgprot)); |
Jeremy Fitzhardinge | 6fdc05d | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 343 | } |
| 344 | |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 345 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
| 346 | { |
| 347 | pteval_t val = pte_val(pte); |
| 348 | |
| 349 | /* |
| 350 | * Chop off the NX bit (if present), and add the NX portion of |
| 351 | * the newprot (if present): |
| 352 | */ |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 353 | val &= _PAGE_CHG_MASK; |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 354 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
Ingo Molnar | 3847231 | 2008-01-30 13:32:57 +0100 | [diff] [blame] | 355 | |
| 356 | return __pte(val); |
| 357 | } |
| 358 | |
Venki Pallipadi | 1c12c4c | 2008-05-14 16:05:51 -0700 | [diff] [blame] | 359 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
| 360 | #define pgprot_modify pgprot_modify |
| 361 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
| 362 | { |
| 363 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
| 364 | pgprotval_t addbits = pgprot_val(newprot); |
| 365 | return __pgprot(preservebits | addbits); |
| 366 | } |
| 367 | |
Jeremy Fitzhardinge | 77be1fa | 2008-07-21 22:59:56 -0700 | [diff] [blame] | 368 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
Andi Kleen | c6ca18e | 2008-01-30 13:33:51 +0100 | [diff] [blame] | 369 | |
Jeremy Fitzhardinge | b534816 | 2009-02-04 18:33:38 -0800 | [diff] [blame] | 370 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
Andi Kleen | 1e8e23b | 2008-01-30 13:33:53 +0100 | [diff] [blame] | 371 | |
venkatesh.pallipadi@intel.com | afc7d20 | 2009-01-09 16:13:10 -0800 | [diff] [blame] | 372 | static inline int is_new_memtype_allowed(unsigned long flags, |
| 373 | unsigned long new_flags) |
| 374 | { |
| 375 | /* |
| 376 | * Certain new memtypes are not allowed with certain |
| 377 | * requested memtype: |
| 378 | * - request is uncached, return cannot be write-back |
| 379 | * - request is write-combine, return cannot be write-back |
| 380 | */ |
| 381 | if ((flags == _PAGE_CACHE_UC_MINUS && |
| 382 | new_flags == _PAGE_CACHE_WB) || |
| 383 | (flags == _PAGE_CACHE_WC && |
| 384 | new_flags == _PAGE_CACHE_WB)) { |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | return 1; |
| 389 | } |
| 390 | |
venkatesh.pallipadi@intel.com | f0970c1 | 2008-03-18 17:00:20 -0700 | [diff] [blame] | 391 | #ifndef __ASSEMBLY__ |
venkatesh.pallipadi@intel.com | 34801ba | 2008-12-19 13:47:29 -0800 | [diff] [blame] | 392 | /* Indicate that x86 has its own track and untrack pfn vma functions */ |
| 393 | #define __HAVE_PFNMAP_TRACKING |
| 394 | |
venkatesh.pallipadi@intel.com | f0970c1 | 2008-03-18 17:00:20 -0700 | [diff] [blame] | 395 | #define __HAVE_PHYS_MEM_ACCESS_PROT |
| 396 | struct file; |
| 397 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, |
| 398 | unsigned long size, pgprot_t vma_prot); |
| 399 | int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, |
| 400 | unsigned long size, pgprot_t *vma_prot); |
| 401 | #endif |
| 402 | |
Jeremy Fitzhardinge | d494a96 | 2008-06-17 11:41:59 -0700 | [diff] [blame] | 403 | /* Install a pte for a particular vaddr in kernel space. */ |
| 404 | void set_pte_vaddr(unsigned long vaddr, pte_t pte); |
Tejun Heo | 458a3e6 | 2009-02-24 11:57:21 +0900 | [diff] [blame^] | 405 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
| 406 | pte_t *populate_extra_pte(unsigned long vaddr); |
Jeremy Fitzhardinge | d494a96 | 2008-06-17 11:41:59 -0700 | [diff] [blame] | 407 | |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 408 | #ifdef CONFIG_X86_32 |
| 409 | extern void native_pagetable_setup_start(pgd_t *base); |
| 410 | extern void native_pagetable_setup_done(pgd_t *base); |
| 411 | #else |
| 412 | static inline void native_pagetable_setup_start(pgd_t *base) {} |
| 413 | static inline void native_pagetable_setup_done(pgd_t *base) {} |
| 414 | #endif |
| 415 | |
Linus Torvalds | 88ed86f | 2008-10-23 12:04:37 -0700 | [diff] [blame] | 416 | struct seq_file; |
| 417 | extern void arch_report_meminfo(struct seq_file *m); |
Jaswinder Singh | e0b7c81 | 2008-07-23 17:40:34 +0530 | [diff] [blame] | 418 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 419 | #ifdef CONFIG_PARAVIRT |
| 420 | #include <asm/paravirt.h> |
| 421 | #else /* !CONFIG_PARAVIRT */ |
| 422 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
| 423 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
| 424 | |
| 425 | #define set_pte_present(mm, addr, ptep, pte) \ |
| 426 | native_set_pte_present(mm, addr, ptep, pte) |
| 427 | #define set_pte_atomic(ptep, pte) \ |
| 428 | native_set_pte_atomic(ptep, pte) |
| 429 | |
| 430 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
| 431 | |
| 432 | #ifndef __PAGETABLE_PUD_FOLDED |
| 433 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
| 434 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
| 435 | #endif |
| 436 | |
| 437 | #ifndef set_pud |
| 438 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
| 439 | #endif |
| 440 | |
| 441 | #ifndef __PAGETABLE_PMD_FOLDED |
| 442 | #define pud_clear(pud) native_pud_clear(pud) |
| 443 | #endif |
| 444 | |
| 445 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
| 446 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
| 447 | |
| 448 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 449 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
Eduardo Habkost | a312b37 | 2008-07-08 15:06:23 -0700 | [diff] [blame] | 450 | |
| 451 | static inline void __init paravirt_pagetable_setup_start(pgd_t *base) |
| 452 | { |
| 453 | native_pagetable_setup_start(base); |
| 454 | } |
| 455 | |
| 456 | static inline void __init paravirt_pagetable_setup_done(pgd_t *base) |
| 457 | { |
| 458 | native_pagetable_setup_done(base); |
| 459 | } |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 460 | #endif /* CONFIG_PARAVIRT */ |
| 461 | |
Jeremy Fitzhardinge | 4614139 | 2008-01-30 13:32:56 +0100 | [diff] [blame] | 462 | #endif /* __ASSEMBLY__ */ |
| 463 | |
Thomas Gleixner | 96a388d | 2007-10-11 11:20:03 +0200 | [diff] [blame] | 464 | #ifdef CONFIG_X86_32 |
| 465 | # include "pgtable_32.h" |
| 466 | #else |
| 467 | # include "pgtable_64.h" |
| 468 | #endif |
Jeremy Fitzhardinge | 6c38665 | 2008-01-30 13:32:55 +0100 | [diff] [blame] | 469 | |
Jeremy Fitzhardinge | fb15a9b | 2008-06-25 00:19:06 -0400 | [diff] [blame] | 470 | /* |
| 471 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
| 472 | * |
| 473 | * this macro returns the index of the entry in the pgd page which would |
| 474 | * control the given virtual address |
| 475 | */ |
| 476 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
| 477 | |
| 478 | /* |
| 479 | * pgd_offset() returns a (pgd_t *) |
| 480 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
| 481 | */ |
| 482 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
| 483 | /* |
| 484 | * a shortcut which implies the use of the kernel's pgd, instead |
| 485 | * of a process's |
| 486 | */ |
| 487 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
| 488 | |
| 489 | |
Jeremy Fitzhardinge | 68db065 | 2008-03-17 16:37:13 -0700 | [diff] [blame] | 490 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
| 491 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
| 492 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 493 | #ifndef __ASSEMBLY__ |
| 494 | |
Thomas Gleixner | 30551bb | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 495 | enum { |
| 496 | PG_LEVEL_NONE, |
| 497 | PG_LEVEL_4K, |
| 498 | PG_LEVEL_2M, |
Ingo Molnar | 86f0398 | 2008-01-30 13:34:09 +0100 | [diff] [blame] | 499 | PG_LEVEL_1G, |
Andi Kleen | ce0c0e5 | 2008-05-02 11:46:49 +0200 | [diff] [blame] | 500 | PG_LEVEL_NUM |
Thomas Gleixner | 30551bb | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 501 | }; |
| 502 | |
Thomas Gleixner | 65280e6 | 2008-05-05 16:35:21 +0200 | [diff] [blame] | 503 | #ifdef CONFIG_PROC_FS |
| 504 | extern void update_page_count(int level, unsigned long pages); |
| 505 | #else |
| 506 | static inline void update_page_count(int level, unsigned long pages) { } |
| 507 | #endif |
Andi Kleen | ce0c0e5 | 2008-05-02 11:46:49 +0200 | [diff] [blame] | 508 | |
Thomas Gleixner | 0a66308 | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 509 | /* |
| 510 | * Helper function that returns the kernel pagetable entry controlling |
| 511 | * the virtual address 'address'. NULL means no pagetable entry present. |
| 512 | * NOTE: the return type is pte_t but if the pmd is PSE then we return it |
| 513 | * as a pte too. |
| 514 | */ |
Harvey Harrison | da7bfc5 | 2008-02-09 23:24:08 +0100 | [diff] [blame] | 515 | extern pte_t *lookup_address(unsigned long address, unsigned int *level); |
Thomas Gleixner | 0a66308 | 2008-01-30 13:34:04 +0100 | [diff] [blame] | 516 | |
Jeremy Fitzhardinge | 4891645 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 517 | /* local pte updates need not use xchg for locking */ |
| 518 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
| 519 | { |
| 520 | pte_t res = *ptep; |
| 521 | |
| 522 | /* Pure native function needs no input for mm, addr */ |
| 523 | native_pte_clear(NULL, 0, ptep); |
| 524 | return res; |
| 525 | } |
| 526 | |
| 527 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
| 528 | pte_t *ptep , pte_t pte) |
| 529 | { |
| 530 | native_set_pte(ptep, pte); |
| 531 | } |
| 532 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 533 | #ifndef CONFIG_PARAVIRT |
| 534 | /* |
| 535 | * Rules for using pte_update - it must be called after any PTE update which |
| 536 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
| 537 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
| 538 | * updates should either be sets, clears, or set_pte_atomic for P->P |
| 539 | * transitions, which means this hook should only be called for user PTEs. |
| 540 | * This hook implies a P->P protection or access change has taken place, which |
| 541 | * requires a subsequent TLB flush. The notification can optionally be delayed |
| 542 | * until the TLB flush event by using the pte_update_defer form of the |
| 543 | * interface, but care must be taken to assure that the flush happens while |
| 544 | * still holding the same page table lock so that the shadow and primary pages |
| 545 | * do not become out of sync on SMP. |
| 546 | */ |
| 547 | #define pte_update(mm, addr, ptep) do { } while (0) |
| 548 | #define pte_update_defer(mm, addr, ptep) do { } while (0) |
| 549 | #endif |
| 550 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 551 | /* |
| 552 | * We only update the dirty/accessed state if we set |
| 553 | * the dirty bit by hand in the kernel, since the hardware |
| 554 | * will do the accessed bit for us, and we don't want to |
| 555 | * race with other CPU's that might be updating the dirty |
| 556 | * bit at the same time. |
| 557 | */ |
Jeremy Fitzhardinge | bea4180 | 2008-06-25 00:18:57 -0400 | [diff] [blame] | 558 | struct vm_area_struct; |
| 559 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 560 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
Jeremy Fitzhardinge | ee5aa8d | 2008-03-17 16:37:03 -0700 | [diff] [blame] | 561 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
| 562 | unsigned long address, pte_t *ptep, |
| 563 | pte_t entry, int dirty); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 564 | |
| 565 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
Jeremy Fitzhardinge | f9fbf1a | 2008-03-17 16:37:04 -0700 | [diff] [blame] | 566 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
| 567 | unsigned long addr, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 568 | |
| 569 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
Jeremy Fitzhardinge | c20311e | 2008-03-17 16:37:05 -0700 | [diff] [blame] | 570 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
| 571 | unsigned long address, pte_t *ptep); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 572 | |
| 573 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 574 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
| 575 | pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 576 | { |
| 577 | pte_t pte = native_ptep_get_and_clear(ptep); |
| 578 | pte_update(mm, addr, ptep); |
| 579 | return pte; |
| 580 | } |
| 581 | |
| 582 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 583 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
| 584 | unsigned long addr, pte_t *ptep, |
| 585 | int full) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 586 | { |
| 587 | pte_t pte; |
| 588 | if (full) { |
| 589 | /* |
| 590 | * Full address destruction in progress; paravirt does not |
| 591 | * care about updates and native needs no locking |
| 592 | */ |
| 593 | pte = native_local_ptep_get_and_clear(ptep); |
| 594 | } else { |
| 595 | pte = ptep_get_and_clear(mm, addr, ptep); |
| 596 | } |
| 597 | return pte; |
| 598 | } |
| 599 | |
| 600 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
Joe Perches | 3cbaeaf | 2008-03-23 01:03:12 -0700 | [diff] [blame] | 601 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
| 602 | unsigned long addr, pte_t *ptep) |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 603 | { |
Jeremy Fitzhardinge | d8d8982 | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 604 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 605 | pte_update(mm, addr, ptep); |
| 606 | } |
| 607 | |
Jeremy Fitzhardinge | 85958b4 | 2008-03-17 16:37:14 -0700 | [diff] [blame] | 608 | /* |
| 609 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
| 610 | * |
| 611 | * dst - pointer to pgd range anwhere on a pgd page |
| 612 | * src - "" |
| 613 | * count - the number of pgds to copy. |
| 614 | * |
| 615 | * dst and src can be on the same page, but the range must not overlap, |
| 616 | * and must not cross a page boundary. |
| 617 | */ |
| 618 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
| 619 | { |
| 620 | memcpy(dst, src, count * sizeof(pgd_t)); |
| 621 | } |
| 622 | |
| 623 | |
Jeremy Fitzhardinge | 195466d | 2008-01-30 13:32:58 +0100 | [diff] [blame] | 624 | #include <asm-generic/pgtable.h> |
| 625 | #endif /* __ASSEMBLY__ */ |
| 626 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 627 | #endif /* _ASM_X86_PGTABLE_H */ |