From d7402513c935ad87413b01aa51a7ada0ad2f0163 Mon Sep 17 00:00:00 2001 From: Douglas Anderson Date: Wed, 6 Sep 2023 09:03:00 -0700 Subject: [PATCH] arm64: smp: IPI_CPU_STOP and IPI_CPU_CRASH_STOP should try for NMI There's no reason why IPI_CPU_STOP and IPI_CPU_CRASH_STOP can't be handled as NMI. They are very simple and everything in them is NMI-safe. Mark them as things to use NMI for if NMI is available. Suggested-by: Mark Rutland Reviewed-by: Stephen Boyd Reviewed-by: Misono Tomohiro Reviewed-by: Sumit Garg Acked-by: Mark Rutland Tested-by: Mark Rutland Tested-by: Chen-Yu Tsai Signed-off-by: Douglas Anderson Link: https://lore.kernel.org/r/20230906090246.v13.5.Ifadbfd45b22c52edcb499034dd4783d096343260@changeid Signed-off-by: Catalin Marinas --- arch/arm64/kernel/smp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 28c904ca499a0..800c59cf9b646 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -946,6 +946,8 @@ static bool ipi_should_be_nmi(enum ipi_msg_type ipi) return false; switch (ipi) { + case IPI_CPU_STOP: + case IPI_CPU_CRASH_STOP: case IPI_CPU_BACKTRACE: return true; default: -- 2.39.5