[PATCH] powerpc/xics: Adjust interrupt receive priority for offline cpus

Vaidyanathan Srinivasan svaidy at linux.vnet.ibm.com
Thu Feb 23 21:54:43 AEDT 2017

Offline CPUs need to receive IPIs through XIVE when they are
in stop state and wakeup from that state.

Reduce interrupt receive priority in order to receive XIVE
wakeup interrupts when in offline state.

LOWEST_PRIORITY would allow all interrupts to be delivered
as wakeup events.

Signed-off-by: Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>
 arch/powerpc/sysdev/xics/xics-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c
index 69d858e..c674a9d 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -199,7 +199,7 @@ void xics_migrate_irqs_away(void)
 	xics_set_cpu_giq(xics_default_distrib_server, 0);
 	/* Allow IPIs again... */
-	icp_ops->set_priority(DEFAULT_PRIORITY);
+	icp_ops->set_priority(LOWEST_PRIORITY);
 	for_each_irq_desc(virq, desc) {
 		struct irq_chip *chip;

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