It should be prohibitted to use priority masking in NMI context. Using local_irq_disable() under the above conditions causes a WARNING. Then, there will be also a mismatch between the PSR.I values and PMR GIC_PRIO_PSR_I_SET.
Signed-off-by: Yuichi Ito <[email protected]> --- arch/arm64/kernel/smp.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index fd59bc7..3c49f06 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -872,7 +872,9 @@ static void ipi_cpu_crash_stop(unsigned int cpu, struct pt_regs *regs) atomic_dec(&waiting_for_crash_ipi); - local_irq_disable(); + if(!in_nmi()) + local_irq_disable(); + sdei_mask_local_cpu(); if (IS_ENABLED(CONFIG_HOTPLUG_CPU)) -- 1.8.3.1
