projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_MMU_CONTEXT_32_H |
| 2 | #define _ASM_X86_MMU_CONTEXT_32_H | |
| 1da177e4 | 3 | |
| 1da177e4 LT |
4 | static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) |
| 5 | { | |
| 6 | #ifdef CONFIG_SMP | |
| cfc31983 JB |
7 | if (x86_read_percpu(cpu_tlbstate.state) == TLBSTATE_OK) |
| 8 | x86_write_percpu(cpu_tlbstate.state, TLBSTATE_LAZY); | |
| 1da177e4 LT |
9 | #endif |
| 10 | } | |
| 11 | ||
| 12 | static inline void switch_mm(struct mm_struct *prev, | |
| 13 | struct mm_struct *next, | |
| 14 | struct task_struct *tsk) | |
| 15 | { | |
| 16 | int cpu = smp_processor_id(); | |
| 17 | ||
| 18 | if (likely(prev != next)) { | |
| 19 | /* stop flush ipis for the previous mm */ | |
| 20 | cpu_clear(cpu, prev->cpu_vm_mask); | |
| 21 | #ifdef CONFIG_SMP | |
| cfc31983 JB |
22 | x86_write_percpu(cpu_tlbstate.state, TLBSTATE_OK); |
| 23 | x86_write_percpu(cpu_tlbstate.active_mm, next); | |
| 1da177e4 LT |
24 | #endif |
| 25 | cpu_set(cpu, next->cpu_vm_mask); | |
| 26 | ||
| 27 | /* Re-load page tables */ | |
| 28 | load_cr3(next->pgd); | |
| 29 | ||
| 30 | /* | |
| 31 | * load the LDT, if the LDT is different: | |
| 32 | */ | |
| 33 | if (unlikely(prev->context.ldt != next->context.ldt)) | |
| e5e3a042 | 34 | load_LDT_nolock(&next->context); |
| 1da177e4 LT |
35 | } |
| 36 | #ifdef CONFIG_SMP | |
| 37 | else { | |
| cfc31983 JB |
38 | x86_write_percpu(cpu_tlbstate.state, TLBSTATE_OK); |
| 39 | BUG_ON(x86_read_percpu(cpu_tlbstate.active_mm) != next); | |
| 1da177e4 LT |
40 | |
| 41 | if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) { | |
| 55464da9 | 42 | /* We were in lazy tlb mode and leave_mm disabled |
| 1da177e4 LT |
43 | * tlb flush IPI delivery. We must reload %cr3. |
| 44 | */ | |
| 45 | load_cr3(next->pgd); | |
| e5e3a042 | 46 | load_LDT_nolock(&next->context); |
| 1da177e4 LT |
47 | } |
| 48 | } | |
| 49 | #endif | |
| 50 | } | |
| 51 | ||
| f95d47ca | 52 | #define deactivate_mm(tsk, mm) \ |
| 464d1a78 | 53 | asm("movl %0,%%gs": :"r" (0)); |
| 1da177e4 | 54 | |
| 1965aae3 | 55 | #endif /* _ASM_X86_MMU_CONTEXT_32_H */ |