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authorDouglas Anderson <[email protected]>2023-09-06 09:03:00 -0700
committerCatalin Marinas <[email protected]>2023-09-25 17:15:29 +0100
commitd7402513c935ad87413b01aa51a7ada0ad2f0163 (patch)
treeffe44b0bf3d8c440a7d3a137fd617e66e04cc308
parent331a1b3a836c0f38165dcec168c0a03b93cf0c17 (diff)
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 <[email protected]> Reviewed-by: Stephen Boyd <[email protected]> Reviewed-by: Misono Tomohiro <[email protected]> Reviewed-by: Sumit Garg <[email protected]> Acked-by: Mark Rutland <[email protected]> Tested-by: Mark Rutland <[email protected]> Tested-by: Chen-Yu Tsai <[email protected]> Signed-off-by: Douglas Anderson <[email protected]> Link: https://lore.kernel.org/r/20230906090246.v13.5.Ifadbfd45b22c52edcb499034dd4783d096343260@changeid Signed-off-by: Catalin Marinas <[email protected]>
-rw-r--r--arch/arm64/kernel/smp.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 28c904ca499a..800c59cf9b64 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: