riscv: Only send remote fences when some other CPU is online

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If no other CPU is online, a local cache or TLB flush is sufficient.
These checks can be constant-folded when SMP is disabled.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20240327045035.368512-6-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

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Samuel Holland 2024-03-26 21:49:46 -07:00 • committed by Palmer Dabbelt

parent 038ac18aae

commit 9546f00410

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4

arch/riscv/mm/cacheflush.c

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4

arch/riscv/mm/tlbflush.c

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