Commit 6efb16b1 authored Aug 22, 2019 by Atish Patra Committed by Paul Walmsley Oct 29, 2019

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 <atish.patra@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>

parent 31738ede

arch/riscv/mm/tlbflush.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -27,6 +27,9 @@ 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 */
		if (size <= PAGE_SIZE)
		local_flush_tlb_page(start);
		else
		local_flush_tlb_all();
		} else {
		riscv_cpuid_to_hartid_mask(cmask, &hmask);

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