From 6efb16b1d5514865d0f7a01910648568ad3225d8 Mon Sep 17 00:00:00 2001 From: Atish Patra Date: Thu, 22 Aug 2019 00:51:51 -0700 Subject: [PATCH] RISC-V: Issue a tlb page flush if possible If tlbflush request is for page only, there is no need to do a complete local tlb shootdown. Just do a local tlb flush for the given address. Signed-off-by: Atish Patra Reviewed-by: Christoph Hellwig Signed-off-by: Paul Walmsley --- arch/riscv/mm/tlbflush.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c index 3531d46473232..720b443c4528f 100644 --- a/arch/riscv/mm/tlbflush.c +++ b/arch/riscv/mm/tlbflush.c @@ -27,7 +27,10 @@ static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start, if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) { /* local cpu is the only cpu present in cpumask */ - local_flush_tlb_all(); + if (size <= PAGE_SIZE) + local_flush_tlb_page(start); + else + local_flush_tlb_all(); } else { riscv_cpuid_to_hartid_mask(cmask, &hmask); sbi_remote_sfence_vma(cpumask_bits(&hmask), start, size); -- 2.30.2