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| author | Will Deacon <will.deacon@arm.com> | 2018-08-23 21:16:50 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-09-11 16:49:12 +0100 |
| commit | ace8cb754539077ed75f3f15b77b2b51b5b7a431 (patch) | |
| tree | bab41795267bc907a837e48799405ee489672604 /arch/arm64/include/asm/tlb.h | |
| parent | f270ab88fdf205be1a7a46ccb61f4a343be543a2 (diff) | |
| download | linux-0-day-ace8cb754539077ed75f3f15b77b2b51b5b7a431.tar.gz linux-0-day-ace8cb754539077ed75f3f15b77b2b51b5b7a431.tar.xz | |
arm64: tlb: Avoid synchronous TLBIs when freeing page tables
By selecting HAVE_RCU_TABLE_INVALIDATE, we can rely on tlb_flush() being
called if we fail to batch table pages for freeing. This in turn allows
us to postpone walk-cache invalidation until tlb_finish_mmu(), which
avoids lots of unnecessary DSBs and means we can shoot down the ASID if
the range is large enough.
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/tlb.h')
| -rw-r--r-- | arch/arm64/include/asm/tlb.h | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h index b078fdec10d56..106fdc951b6ee 100644 --- a/arch/arm64/include/asm/tlb.h +++ b/arch/arm64/include/asm/tlb.h @@ -54,7 +54,6 @@ static inline void tlb_flush(struct mmu_gather *tlb) static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, unsigned long addr) { - __flush_tlb_pgtable(tlb->mm, addr); pgtable_page_dtor(pte); tlb_remove_table(tlb, pte); } @@ -63,7 +62,6 @@ static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, unsigned long addr) { - __flush_tlb_pgtable(tlb->mm, addr); tlb_remove_table(tlb, virt_to_page(pmdp)); } #endif @@ -72,7 +70,6 @@ static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, static inline void __pud_free_tlb(struct mmu_gather *tlb, pud_t *pudp, unsigned long addr) { - __flush_tlb_pgtable(tlb->mm, addr); tlb_remove_table(tlb, virt_to_page(pudp)); } #endif |