From 42d5b846574f0904dbaf9dbdea4f19402589cddf Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Sat, 2 Feb 2019 01:43:25 +0000 Subject: MIPS: mm: Unify ASID version checks Introduce a new check_mmu_context() function to check an mm's ASID version & get a new one if it's outdated, and a check_switch_mmu_context() function which additionally sets up the new ASID & page directory. Simplify switch_mm() & various get_new_mmu_context() callsites in MIPS KVM by making use of the new functions, which will help reduce the amount of code that requires modification to gain MMID support. Signed-off-by: Paul Burton Cc: linux-mips@vger.kernel.org --- arch/mips/include/asm/mmu_context.h | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'arch/mips/include/asm') diff --git a/arch/mips/include/asm/mmu_context.h b/arch/mips/include/asm/mmu_context.h index cb39a39d02f6..336682fb48de 100644 --- a/arch/mips/include/asm/mmu_context.h +++ b/arch/mips/include/asm/mmu_context.h @@ -98,6 +98,8 @@ static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) } extern void get_new_mmu_context(struct mm_struct *mm); +extern void check_mmu_context(struct mm_struct *mm); +extern void check_switch_mmu_context(struct mm_struct *mm); /* * Initialize the context related info for a new mm_struct @@ -126,11 +128,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, local_irq_save(flags); htw_stop(); - /* Check if our ASID is of an older version and thus invalid */ - if ((cpu_context(cpu, next) ^ asid_cache(cpu)) & asid_version_mask(cpu)) - get_new_mmu_context(next); - write_c0_entryhi(cpu_asid(cpu, next)); - TLBMISS_HANDLER_SETUP_PGD(next->pgd); + check_switch_mmu_context(next); /* * Mark current->active_mm as not "active" anymore. -- cgit v1.2.3