RISC-V: Issue a local tlbflush if possible.

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In RISC-V, tlb flush happens via SBI which is expensive. If the local
cpu is the only cpu in cpumask, there is no need to invoke a SBI call.

Just do a local flush and return.

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>

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Atish Patra 2019-08-22 00:51:50 -07:00 • committed by Paul Walmsley

parent 6384423f49

commit 31738ede9b

1 changed files with 17 additions and 2 deletions

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arch/riscv/mm/tlbflush.c

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