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-rw-r--r--arch/x86/include/asm/pgtable.h509
1 files changed, 258 insertions, 251 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h
index 4f5af8447d54..d0812e155f1d 100644
--- a/arch/x86/include/asm/pgtable.h
+++ b/arch/x86/include/asm/pgtable.h
@@ -1,164 +1,9 @@
1#ifndef _ASM_X86_PGTABLE_H 1#ifndef _ASM_X86_PGTABLE_H
2#define _ASM_X86_PGTABLE_H 2#define _ASM_X86_PGTABLE_H
3 3
4#define FIRST_USER_ADDRESS 0 4#include <asm/page.h>
5
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) */
13#define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */
14#define _PAGE_BIT_PAT 7 /* on 4KB pages */
15#define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */
16#define _PAGE_BIT_UNUSED1 9 /* available for programmer */
17#define _PAGE_BIT_IOMAP 10 /* flag used to indicate IO mapping */
18#define _PAGE_BIT_UNUSED3 11
19#define _PAGE_BIT_PAT_LARGE 12 /* On 2MB or 1GB pages */
20#define _PAGE_BIT_SPECIAL _PAGE_BIT_UNUSED1
21#define _PAGE_BIT_CPA_TEST _PAGE_BIT_UNUSED1
22#define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */
23
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
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)
40#define _PAGE_IOMAP (_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
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)
44#define _PAGE_SPECIAL (_AT(pteval_t, 1) << _PAGE_BIT_SPECIAL)
45#define _PAGE_CPA_TEST (_AT(pteval_t, 1) << _PAGE_BIT_CPA_TEST)
46#define __HAVE_ARCH_PTE_SPECIAL
47
48#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE)
49#define _PAGE_NX (_AT(pteval_t, 1) << _PAGE_BIT_NX)
50#else
51#define _PAGE_NX (_AT(pteval_t, 0))
52#endif
53 5
54#define _PAGE_FILE (_AT(pteval_t, 1) << _PAGE_BIT_FILE) 6#include <asm/pgtable_types.h>
55#define _PAGE_PROTNONE (_AT(pteval_t, 1) << _PAGE_BIT_PROTNONE)
56
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)
61
62/* Set of bits not changed in pte_modify */
63#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
64 _PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY)
65
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
72#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
73#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | \
74 _PAGE_ACCESSED | _PAGE_NX)
75
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)
82#define PAGE_COPY PAGE_COPY_NOEXEC
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)
87
88#define __PAGE_KERNEL_EXEC \
89 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_GLOBAL)
90#define __PAGE_KERNEL (__PAGE_KERNEL_EXEC | _PAGE_NX)
91
92#define __PAGE_KERNEL_RO (__PAGE_KERNEL & ~_PAGE_RW)
93#define __PAGE_KERNEL_RX (__PAGE_KERNEL_EXEC & ~_PAGE_RW)
94#define __PAGE_KERNEL_EXEC_NOCACHE (__PAGE_KERNEL_EXEC | _PAGE_PCD | _PAGE_PWT)
95#define __PAGE_KERNEL_WC (__PAGE_KERNEL | _PAGE_CACHE_WC)
96#define __PAGE_KERNEL_NOCACHE (__PAGE_KERNEL | _PAGE_PCD | _PAGE_PWT)
97#define __PAGE_KERNEL_UC_MINUS (__PAGE_KERNEL | _PAGE_PCD)
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)
101#define __PAGE_KERNEL_LARGE_NOCACHE (__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
102#define __PAGE_KERNEL_LARGE_EXEC (__PAGE_KERNEL_EXEC | _PAGE_PSE)
103
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
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)
118#define PAGE_KERNEL_LARGE_NOCACHE __pgprot(__PAGE_KERNEL_LARGE_NOCACHE)
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)
122
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
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
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
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 */
158#define PTE_IDENT_ATTR 0x003 /* PRESENT+RW */
159#define PDE_IDENT_ATTR 0x067 /* PRESENT+RW+USER+DIRTY+ACCESSED */
160#define PGD_IDENT_ATTR 0x001 /* PRESENT (no other attributes) */
161#endif
162 7
163/* 8/*
164 * Macro to mark a page protection value as UC- 9 * Macro to mark a page protection value as UC-
@@ -170,9 +15,6 @@
170 15
171#ifndef __ASSEMBLY__ 16#ifndef __ASSEMBLY__
172 17
173#define pgprot_writecombine pgprot_writecombine
174extern pgprot_t pgprot_writecombine(pgprot_t prot);
175
176/* 18/*
177 * ZERO_PAGE is a global shared page that is always zero: used 19 * ZERO_PAGE is a global shared page that is always zero: used
178 * for zero-mapped memory areas etc.. 20 * for zero-mapped memory areas etc..
@@ -183,6 +25,66 @@ extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
183extern spinlock_t pgd_lock; 25extern spinlock_t pgd_lock;
184extern struct list_head pgd_list; 26extern struct list_head pgd_list;
185 27
28#ifdef CONFIG_PARAVIRT
29#include <asm/paravirt.h>
30#else /* !CONFIG_PARAVIRT */
31#define set_pte(ptep, pte) native_set_pte(ptep, pte)
32#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
33
34#define set_pte_present(mm, addr, ptep, pte) \
35 native_set_pte_present(mm, addr, ptep, pte)
36#define set_pte_atomic(ptep, pte) \
37 native_set_pte_atomic(ptep, pte)
38
39#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd)
40
41#ifndef __PAGETABLE_PUD_FOLDED
42#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd)
43#define pgd_clear(pgd) native_pgd_clear(pgd)
44#endif
45
46#ifndef set_pud
47# define set_pud(pudp, pud) native_set_pud(pudp, pud)
48#endif
49
50#ifndef __PAGETABLE_PMD_FOLDED
51#define pud_clear(pud) native_pud_clear(pud)
52#endif
53
54#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep)
55#define pmd_clear(pmd) native_pmd_clear(pmd)
56
57#define pte_update(mm, addr, ptep) do { } while (0)
58#define pte_update_defer(mm, addr, ptep) do { } while (0)
59
60static inline void __init paravirt_pagetable_setup_start(pgd_t *base)
61{
62 native_pagetable_setup_start(base);
63}
64
65static inline void __init paravirt_pagetable_setup_done(pgd_t *base)
66{
67 native_pagetable_setup_done(base);
68}
69
70#define pgd_val(x) native_pgd_val(x)
71#define __pgd(x) native_make_pgd(x)
72
73#ifndef __PAGETABLE_PUD_FOLDED
74#define pud_val(x) native_pud_val(x)
75#define __pud(x) native_make_pud(x)
76#endif
77
78#ifndef __PAGETABLE_PMD_FOLDED
79#define pmd_val(x) native_pmd_val(x)
80#define __pmd(x) native_make_pmd(x)
81#endif
82
83#define pte_val(x) native_pte_val(x)
84#define __pte(x) native_make_pte(x)
85
86#endif /* CONFIG_PARAVIRT */
87
186/* 88/*
187 * The following only work if pte_present() is true. 89 * The following only work if pte_present() is true.
188 * Undefined behaviour if not.. 90 * Undefined behaviour if not..
@@ -236,72 +138,84 @@ static inline unsigned long pte_pfn(pte_t pte)
236 138
237static inline int pmd_large(pmd_t pte) 139static inline int pmd_large(pmd_t pte)
238{ 140{
239 return (pmd_val(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == 141 return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) ==
240 (_PAGE_PSE | _PAGE_PRESENT); 142 (_PAGE_PSE | _PAGE_PRESENT);
241} 143}
242 144
145static inline pte_t pte_set_flags(pte_t pte, pteval_t set)
146{
147 pteval_t v = native_pte_val(pte);
148
149 return native_make_pte(v | set);
150}
151
152static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear)
153{
154 pteval_t v = native_pte_val(pte);
155
156 return native_make_pte(v & ~clear);
157}
158
243static inline pte_t pte_mkclean(pte_t pte) 159static inline pte_t pte_mkclean(pte_t pte)
244{ 160{
245 return __pte(pte_val(pte) & ~_PAGE_DIRTY); 161 return pte_clear_flags(pte, _PAGE_DIRTY);
246} 162}
247 163
248static inline pte_t pte_mkold(pte_t pte) 164static inline pte_t pte_mkold(pte_t pte)
249{ 165{
250 return __pte(pte_val(pte) & ~_PAGE_ACCESSED); 166 return pte_clear_flags(pte, _PAGE_ACCESSED);
251} 167}
252 168
253static inline pte_t pte_wrprotect(pte_t pte) 169static inline pte_t pte_wrprotect(pte_t pte)
254{ 170{
255 return __pte(pte_val(pte) & ~_PAGE_RW); 171 return pte_clear_flags(pte, _PAGE_RW);
256} 172}
257 173
258static inline pte_t pte_mkexec(pte_t pte) 174static inline pte_t pte_mkexec(pte_t pte)
259{ 175{
260 return __pte(pte_val(pte) & ~_PAGE_NX); 176 return pte_clear_flags(pte, _PAGE_NX);
261} 177}
262 178
263static inline pte_t pte_mkdirty(pte_t pte) 179static inline pte_t pte_mkdirty(pte_t pte)
264{ 180{
265 return __pte(pte_val(pte) | _PAGE_DIRTY); 181 return pte_set_flags(pte, _PAGE_DIRTY);
266} 182}
267 183
268static inline pte_t pte_mkyoung(pte_t pte) 184static inline pte_t pte_mkyoung(pte_t pte)
269{ 185{
270 return __pte(pte_val(pte) | _PAGE_ACCESSED); 186 return pte_set_flags(pte, _PAGE_ACCESSED);
271} 187}
272 188
273static inline pte_t pte_mkwrite(pte_t pte) 189static inline pte_t pte_mkwrite(pte_t pte)
274{ 190{
275 return __pte(pte_val(pte) | _PAGE_RW); 191 return pte_set_flags(pte, _PAGE_RW);
276} 192}
277 193
278static inline pte_t pte_mkhuge(pte_t pte) 194static inline pte_t pte_mkhuge(pte_t pte)
279{ 195{
280 return __pte(pte_val(pte) | _PAGE_PSE); 196 return pte_set_flags(pte, _PAGE_PSE);
281} 197}
282 198
283static inline pte_t pte_clrhuge(pte_t pte) 199static inline pte_t pte_clrhuge(pte_t pte)
284{ 200{
285 return __pte(pte_val(pte) & ~_PAGE_PSE); 201 return pte_clear_flags(pte, _PAGE_PSE);
286} 202}
287 203
288static inline pte_t pte_mkglobal(pte_t pte) 204static inline pte_t pte_mkglobal(pte_t pte)
289{ 205{
290 return __pte(pte_val(pte) | _PAGE_GLOBAL); 206 return pte_set_flags(pte, _PAGE_GLOBAL);
291} 207}
292 208
293static inline pte_t pte_clrglobal(pte_t pte) 209static inline pte_t pte_clrglobal(pte_t pte)
294{ 210{
295 return __pte(pte_val(pte) & ~_PAGE_GLOBAL); 211 return pte_clear_flags(pte, _PAGE_GLOBAL);
296} 212}
297 213
298static inline pte_t pte_mkspecial(pte_t pte) 214static inline pte_t pte_mkspecial(pte_t pte)
299{ 215{
300 return __pte(pte_val(pte) | _PAGE_SPECIAL); 216 return pte_set_flags(pte, _PAGE_SPECIAL);
301} 217}
302 218
303extern pteval_t __supported_pte_mask;
304
305/* 219/*
306 * Mask out unsupported bits in a present pgprot. Non-present pgprots 220 * Mask out unsupported bits in a present pgprot. Non-present pgprots
307 * can use those bits for other purposes, so leave them be. 221 * can use those bits for other purposes, so leave them be.
@@ -374,82 +288,197 @@ static inline int is_new_memtype_allowed(unsigned long flags,
374 return 1; 288 return 1;
375} 289}
376 290
377#ifndef __ASSEMBLY__ 291pmd_t *populate_extra_pmd(unsigned long vaddr);
378/* Indicate that x86 has its own track and untrack pfn vma functions */ 292pte_t *populate_extra_pte(unsigned long vaddr);
379#define __HAVE_PFNMAP_TRACKING 293#endif /* __ASSEMBLY__ */
380
381#define __HAVE_PHYS_MEM_ACCESS_PROT
382struct file;
383pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
384 unsigned long size, pgprot_t vma_prot);
385int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
386 unsigned long size, pgprot_t *vma_prot);
387#endif
388
389/* Install a pte for a particular vaddr in kernel space. */
390void set_pte_vaddr(unsigned long vaddr, pte_t pte);
391 294
392#ifdef CONFIG_X86_32 295#ifdef CONFIG_X86_32
393extern void native_pagetable_setup_start(pgd_t *base); 296# include "pgtable_32.h"
394extern void native_pagetable_setup_done(pgd_t *base);
395#else 297#else
396static inline void native_pagetable_setup_start(pgd_t *base) {} 298# include "pgtable_64.h"
397static inline void native_pagetable_setup_done(pgd_t *base) {}
398#endif 299#endif
399 300
400struct seq_file; 301#ifndef __ASSEMBLY__
401extern void arch_report_meminfo(struct seq_file *m); 302#include <linux/mm_types.h>
402 303
403#ifdef CONFIG_PARAVIRT 304static inline int pte_none(pte_t pte)
404#include <asm/paravirt.h> 305{
405#else /* !CONFIG_PARAVIRT */ 306 return !pte.pte;
406#define set_pte(ptep, pte) native_set_pte(ptep, pte) 307}
407#define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte)
408 308
409#define set_pte_present(mm, addr, ptep, pte) \ 309#define __HAVE_ARCH_PTE_SAME
410 native_set_pte_present(mm, addr, ptep, pte) 310static inline int pte_same(pte_t a, pte_t b)
411#define set_pte_atomic(ptep, pte) \ 311{
412 native_set_pte_atomic(ptep, pte) 312 return a.pte == b.pte;
313}
413 314
414#define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) 315static inline int pte_present(pte_t a)
316{
317 return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE);
318}
415 319
416#ifndef __PAGETABLE_PUD_FOLDED 320static inline int pmd_present(pmd_t pmd)
417#define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) 321{
418#define pgd_clear(pgd) native_pgd_clear(pgd) 322 return pmd_flags(pmd) & _PAGE_PRESENT;
419#endif 323}
420 324
421#ifndef set_pud 325static inline int pmd_none(pmd_t pmd)
422# define set_pud(pudp, pud) native_set_pud(pudp, pud) 326{
423#endif 327 /* Only check low word on 32-bit platforms, since it might be
328 out of sync with upper half. */
329 return (unsigned long)native_pmd_val(pmd) == 0;
330}
424 331
425#ifndef __PAGETABLE_PMD_FOLDED 332static inline unsigned long pmd_page_vaddr(pmd_t pmd)
426#define pud_clear(pud) native_pud_clear(pud) 333{
427#endif 334 return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK);
335}
428 336
429#define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) 337/*
430#define pmd_clear(pmd) native_pmd_clear(pmd) 338 * Currently stuck as a macro due to indirect forward reference to
339 * linux/mmzone.h's __section_mem_map_addr() definition:
340 */
341#define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)
431 342
432#define pte_update(mm, addr, ptep) do { } while (0) 343/*
433#define pte_update_defer(mm, addr, ptep) do { } while (0) 344 * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
345 *
346 * this macro returns the index of the entry in the pmd page which would
347 * control the given virtual address
348 */
349static inline unsigned pmd_index(unsigned long address)
350{
351 return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
352}
434 353
435static inline void __init paravirt_pagetable_setup_start(pgd_t *base) 354/*
355 * Conversion functions: convert a page and protection to a page entry,
356 * and a page entry and page directory to the page they refer to.
357 *
358 * (Currently stuck as a macro because of indirect forward reference
359 * to linux/mm.h:page_to_nid())
360 */
361#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
362
363/*
364 * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
365 *
366 * this function returns the index of the entry in the pte page which would
367 * control the given virtual address
368 */
369static inline unsigned pte_index(unsigned long address)
436{ 370{
437 native_pagetable_setup_start(base); 371 return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1);
438} 372}
439 373
440static inline void __init paravirt_pagetable_setup_done(pgd_t *base) 374static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address)
441{ 375{
442 native_pagetable_setup_done(base); 376 return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address);
443} 377}
444#endif /* CONFIG_PARAVIRT */
445 378
446#endif /* __ASSEMBLY__ */ 379static inline int pmd_bad(pmd_t pmd)
380{
381 return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE;
382}
447 383
448#ifdef CONFIG_X86_32 384static inline unsigned long pages_to_mb(unsigned long npg)
449# include "pgtable_32.h" 385{
386 return npg >> (20 - PAGE_SHIFT);
387}
388
389#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
390 remap_pfn_range(vma, vaddr, pfn, size, prot)
391
392#if PAGETABLE_LEVELS > 2
393static inline int pud_none(pud_t pud)
394{
395 return native_pud_val(pud) == 0;
396}
397
398static inline int pud_present(pud_t pud)
399{
400 return pud_flags(pud) & _PAGE_PRESENT;
401}
402
403static inline unsigned long pud_page_vaddr(pud_t pud)
404{
405 return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK);
406}
407
408/*
409 * Currently stuck as a macro due to indirect forward reference to
410 * linux/mmzone.h's __section_mem_map_addr() definition:
411 */
412#define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT)
413
414/* Find an entry in the second-level page table.. */
415static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
416{
417 return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
418}
419
420static inline unsigned long pmd_pfn(pmd_t pmd)
421{
422 return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT;
423}
424
425static inline int pud_large(pud_t pud)
426{
427 return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) ==
428 (_PAGE_PSE | _PAGE_PRESENT);
429}
430
431static inline int pud_bad(pud_t pud)
432{
433 return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0;
434}
450#else 435#else
451# include "pgtable_64.h" 436static inline int pud_large(pud_t pud)
452#endif 437{
438 return 0;
439}
440#endif /* PAGETABLE_LEVELS > 2 */
441
442#if PAGETABLE_LEVELS > 3
443static inline int pgd_present(pgd_t pgd)
444{
445 return pgd_flags(pgd) & _PAGE_PRESENT;
446}
447
448static inline unsigned long pgd_page_vaddr(pgd_t pgd)
449{
450 return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK);
451}
452
453/*
454 * Currently stuck as a macro due to indirect forward reference to
455 * linux/mmzone.h's __section_mem_map_addr() definition:
456 */
457#define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)
458
459/* to find an entry in a page-table-directory. */
460static inline unsigned pud_index(unsigned long address)
461{
462 return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1);
463}
464
465static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address)
466{
467 return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address);
468}
469
470static inline int pgd_bad(pgd_t pgd)
471{
472 return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE;
473}
474
475static inline int pgd_none(pgd_t pgd)
476{
477 return !native_pgd_val(pgd);
478}
479#endif /* PAGETABLE_LEVELS > 3 */
480
481#endif /* __ASSEMBLY__ */
453 482
454/* 483/*
455 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] 484 * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
@@ -476,28 +505,6 @@ static inline void __init paravirt_pagetable_setup_done(pgd_t *base)
476 505
477#ifndef __ASSEMBLY__ 506#ifndef __ASSEMBLY__
478 507
479enum {
480 PG_LEVEL_NONE,
481 PG_LEVEL_4K,
482 PG_LEVEL_2M,
483 PG_LEVEL_1G,
484 PG_LEVEL_NUM
485};
486
487#ifdef CONFIG_PROC_FS
488extern void update_page_count(int level, unsigned long pages);
489#else
490static inline void update_page_count(int level, unsigned long pages) { }
491#endif
492
493/*
494 * Helper function that returns the kernel pagetable entry controlling
495 * the virtual address 'address'. NULL means no pagetable entry present.
496 * NOTE: the return type is pte_t but if the pmd is PSE then we return it
497 * as a pte too.
498 */
499extern pte_t *lookup_address(unsigned long address, unsigned int *level);
500
501/* local pte updates need not use xchg for locking */ 508/* local pte updates need not use xchg for locking */
502static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) 509static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)
503{ 510{
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-17 21:20:38 -0500