#ifndef __X86_64_MMU_CONTEXT_H #define __X86_64_MMU_CONTEXT_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