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 <mark.rutl...@arm.com>
Reviewed-by: Stephen Boyd <swb...@chromium.org>
Signed-off-by: Douglas Anderson <diand...@chromium.org>
---
I don't actually have any good way to test/validate this patch. It's
added to the series at Mark's request.
(no changes since v10)
Changes in v10:
- ("IPI_CPU_STOP and IPI_CPU_CRASH_STOP should try for NMI") new for v10.
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 c8896cbc5327..4566934aaf9f 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:
--
2.42.0.rc1.204.g551eb34607-goog
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