diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-10-27 10:50:54 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-10-27 10:50:54 +0100 |
commit | 4944dd62de21230af039eda7cd218e9a09021d11 (patch) | |
tree | bac70f7bab8506c7e1b0408bacbdb0b1d77262e9 /arch/x86/include/asm/mmu_context_64.h | |
parent | f17845e5d97ead8fbdadfd40039e058ec7cf4a42 (diff) | |
parent | 0173a3265b228da319ceb9c1ec6a5682fd1b2d92 (diff) |
Merge commit 'v2.6.28-rc2' into tracing/urgent
Diffstat (limited to 'arch/x86/include/asm/mmu_context_64.h')
-rw-r--r-- | arch/x86/include/asm/mmu_context_64.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mmu_context_64.h b/arch/x86/include/asm/mmu_context_64.h new file mode 100644 index 00000000000..677d36e9540 --- /dev/null +++ b/arch/x86/include/asm/mmu_context_64.h @@ -0,0 +1,54 @@ +#ifndef _ASM_X86_MMU_CONTEXT_64_H +#define _ASM_X86_MMU_CONTEXT_64_H + +#include <asm/pda.h> + +static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) +{ +#ifdef CONFIG_SMP + if (read_pda(mmu_state) == TLBSTATE_OK) + write_pda(mmu_state, TLBSTATE_LAZY); +#endif +} + +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + unsigned cpu = smp_processor_id(); + if (likely(prev != next)) { + /* stop flush ipis for the previous mm */ + cpu_clear(cpu, prev->cpu_vm_mask); +#ifdef CONFIG_SMP + write_pda(mmu_state, TLBSTATE_OK); + write_pda(active_mm, next); +#endif + cpu_set(cpu, next->cpu_vm_mask); + load_cr3(next->pgd); + + if (unlikely(next->context.ldt != prev->context.ldt)) + load_LDT_nolock(&next->context); + } +#ifdef CONFIG_SMP + else { + write_pda(mmu_state, TLBSTATE_OK); + if (read_pda(active_mm) != next) + BUG(); + if (!cpu_test_and_set(cpu, next->cpu_vm_mask)) { + /* We were in lazy tlb mode and leave_mm disabled + * tlb flush IPI delivery. We must reload CR3 + * to make sure to use no freed page tables. + */ + load_cr3(next->pgd); + load_LDT_nolock(&next->context); + } + } +#endif +} + +#define deactivate_mm(tsk, mm) \ +do { \ + load_gs_index(0); \ + asm volatile("movl %0,%%fs"::"r"(0)); \ +} while (0) + +#endif /* _ASM_X86_MMU_CONTEXT_64_H */ |