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| author | Zhenyu Ye <yezhenyu2@huawei.com> | 2020-06-25 16:03:13 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-07-07 11:23:47 +0100 |
| commit | c4ab2cbc1d8768eb505708a58c54c277dfe4a93d (patch) | |
| tree | 53e9dd2439479f75e0dc7c03c75048cd165d8803 /arch/arm64/include/asm/tlb.h | |
| parent | 2631ed00b0498810f8d5c2163c6b5270d893687b (diff) | |
| download | linux-c4ab2cbc1d8768eb505708a58c54c277dfe4a93d.tar.bz2 | |
arm64: tlb: Set the TTL field in flush_tlb_range
This patch uses the cleared_* in struct mmu_gather to set the
TTL field in flush_tlb_range().
Signed-off-by: Zhenyu Ye <yezhenyu2@huawei.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20200625080314.230-6-yezhenyu2@huawei.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 | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h index b76df828e6b7..61c97d3b58c7 100644 --- a/arch/arm64/include/asm/tlb.h +++ b/arch/arm64/include/asm/tlb.h @@ -21,11 +21,37 @@ static void tlb_flush(struct mmu_gather *tlb); #include <asm-generic/tlb.h> +/* + * get the tlbi levels in arm64. Default value is 0 if more than one + * of cleared_* is set or neither is set. + * Arm64 doesn't support p4ds now. + */ +static inline int tlb_get_level(struct mmu_gather *tlb) +{ + if (tlb->cleared_ptes && !(tlb->cleared_pmds || + tlb->cleared_puds || + tlb->cleared_p4ds)) + return 3; + + if (tlb->cleared_pmds && !(tlb->cleared_ptes || + tlb->cleared_puds || + tlb->cleared_p4ds)) + return 2; + + if (tlb->cleared_puds && !(tlb->cleared_ptes || + tlb->cleared_pmds || + tlb->cleared_p4ds)) + return 1; + + return 0; +} + static inline void tlb_flush(struct mmu_gather *tlb) { struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0); bool last_level = !tlb->freed_tables; unsigned long stride = tlb_get_unmap_size(tlb); + int tlb_level = tlb_get_level(tlb); /* * If we're tearing down the address space then we only care about @@ -38,7 +64,8 @@ static inline void tlb_flush(struct mmu_gather *tlb) return; } - __flush_tlb_range(&vma, tlb->start, tlb->end, stride, last_level); + __flush_tlb_range(&vma, tlb->start, tlb->end, stride, + last_level, tlb_level); } static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte, |