Messages in this thread Patch in this message | | | From | Atish Patra <> | Subject | [PATCH v4 3/3] RISC-V: Issue a tlb page flush if possible | Date | Thu, 22 Aug 2019 00:51:51 -0700 |
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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 <atish.patra@wdc.com> --- 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 8172fbf46123..b1c04751bcf1 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); -- 2.21.0
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