The hmi is defined to be higher priority than other maskable
interrupts, so replay it first, as a best-effort to replay according
to hardware priorities.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/kernel/irq.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 3cb46a3..ad1a930 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -155,6 +155,15 @@ notrace unsigned int __check_irq_replay(void)
}
/*
+ * Check if an hypervisor Maintenance interrupt happened.
+ * This is a higher priority interrupt than the others, so
+ * replay it first.
+ */
+ local_paca->irq_happened &= ~PACA_IRQ_HMI;
+ if (happened & PACA_IRQ_HMI)
+ return 0xe60;
+
+ /*
* We may have missed a decrementer interrupt. We check the
* decrementer itself rather than the paca irq_happened field
* in case we also had a rollover while hard disabled
@@ -189,11 +198,6 @@ notrace unsigned int __check_irq_replay(void)
}
#endif /* CONFIG_PPC_BOOK3E */
- /* Check if an hypervisor Maintenance interrupt happened */
- local_paca->irq_happened &= ~PACA_IRQ_HMI;
- if (happened & PACA_IRQ_HMI)
- return 0xe60;
-
/* There should be nothing left ! */
BUG_ON(local_paca->irq_happened != 0);
--
2.9.3
