[PATCH] powerpc/64: replay hypervisor maintenance priority
From: Nicholas Piggin <npiggin@gmail.com>
Date: 2016-09-14 03:01:42
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 <npiggin@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