diff options
Diffstat (limited to 'arch/arm64/include/asm/mmu_context.h')
| -rw-r--r-- | arch/arm64/include/asm/mmu_context.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index 04586a88487b..237635d8a46f 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -78,8 +78,11 @@ static inline void switch_new_context(struct mm_struct *mm) static inline void check_and_switch_context(struct mm_struct *mm, struct task_struct *tsk) { - /* unneeded switch to ASID0 */ - /* cpu_set_reserved_ttbr0(); */ + /* + * Required during context switch to avoid speculative page table + * walking with the wrong TTBR. + */ + cpu_set_reserved_ttbr0(); if (!((mm->context.id ^ cpu_last_asid) >> max_asid_bits)) /* |