diff options
| author | Paul Burton <paul.burton@mips.com> | 2019-02-02 01:43:25 +0000 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-02-04 10:56:30 -0800 |
| commit | 42d5b846574f0904dbaf9dbdea4f19402589cddf (patch) | |
| tree | 77fdb7637de77008be9443b6b16de0be15beacb5 /arch/mips/include | |
| parent | 4ebea49ce233ce76421250f113a75d6d33c90e22 (diff) | |
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version & get a new one if it's outdated, and a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 <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/mmu_context.h | 8 |
1 files changed, 3 insertions, 5 deletions
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. |