Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
ba180fd4 | 2 | * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
6 | #ifndef __UM_MMU_CONTEXT_H | |
7 | #define __UM_MMU_CONTEXT_H | |
8 | ||
4dc706c2 | 9 | #include <linux/sched.h> |
589ee628 IM |
10 | #include <linux/mm_types.h> |
11 | ||
4dc706c2 | 12 | #include <asm/mmu.h> |
1da177e4 | 13 | |
ac2aca28 | 14 | extern void uml_setup_stubs(struct mm_struct *mm); |
62e88b1c DH |
15 | /* |
16 | * Needed since we do not use the asm-generic/mm_hooks.h: | |
17 | */ | |
18 | static inline void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) | |
19 | { | |
20 | uml_setup_stubs(mm); | |
21 | } | |
3963333f | 22 | extern void arch_exit_mmap(struct mm_struct *mm); |
62e88b1c DH |
23 | static inline void arch_unmap(struct mm_struct *mm, |
24 | struct vm_area_struct *vma, | |
25 | unsigned long start, unsigned long end) | |
26 | { | |
27 | } | |
28 | static inline void arch_bprm_mm_init(struct mm_struct *mm, | |
29 | struct vm_area_struct *vma) | |
30 | { | |
31 | } | |
9d95b175 DH |
32 | |
33 | static inline bool arch_vma_access_permitted(struct vm_area_struct *vma, | |
34 | bool write, bool execute, bool foreign) | |
35 | { | |
36 | /* by default, allow everything */ | |
37 | return true; | |
38 | } | |
39 | ||
40 | static inline bool arch_pte_access_permitted(pte_t pte, bool write) | |
41 | { | |
42 | /* by default, allow everything */ | |
43 | return true; | |
44 | } | |
45 | ||
62e88b1c DH |
46 | /* |
47 | * end asm-generic/mm_hooks.h functions | |
48 | */ | |
3963333f | 49 | |
1da177e4 LT |
50 | #define deactivate_mm(tsk,mm) do { } while (0) |
51 | ||
c40504e8 BL |
52 | extern void force_flush_all(void); |
53 | ||
1da177e4 LT |
54 | static inline void activate_mm(struct mm_struct *old, struct mm_struct *new) |
55 | { | |
1e40cd38 | 56 | /* |
aab2545f ON |
57 | * This is called by fs/exec.c and sys_unshare() |
58 | * when the new ->mm is used for the first time. | |
1e40cd38 | 59 | */ |
aab2545f | 60 | __switch_mm(&new->context.id); |
ac2aca28 AV |
61 | down_write(&new->mmap_sem); |
62 | uml_setup_stubs(new); | |
63 | up_write(&new->mmap_sem); | |
1da177e4 LT |
64 | } |
65 | ||
1da177e4 LT |
66 | static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, |
67 | struct task_struct *tsk) | |
68 | { | |
69 | unsigned cpu = smp_processor_id(); | |
70 | ||
71 | if(prev != next){ | |
fa40699b RR |
72 | cpumask_clear_cpu(cpu, mm_cpumask(prev)); |
73 | cpumask_set_cpu(cpu, mm_cpumask(next)); | |
1da177e4 | 74 | if(next != &init_mm) |
6c738ffa | 75 | __switch_mm(&next->context.id); |
1da177e4 LT |
76 | } |
77 | } | |
78 | ||
79 | static inline void enter_lazy_tlb(struct mm_struct *mm, | |
80 | struct task_struct *tsk) | |
81 | { | |
82 | } | |
83 | ||
77bf4400 | 84 | extern int init_new_context(struct task_struct *task, struct mm_struct *mm); |
1da177e4 | 85 | |
77bf4400 | 86 | extern void destroy_context(struct mm_struct *mm); |
1da177e4 LT |
87 | |
88 | #endif |