1 files changed, 25 insertions, 0 deletions

diff --git a/arch/ppc64/kernel/xics.c b/arch/ppc64/kernel/xics.c
index 879f39b90a33..677c4450984a 100644
--- a/arch/ppc64/kernel/xics.c
+++ b/arch/ppc64/kernel/xics.c
@@ -647,6 +647,31 @@ static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
         }
 }
 
+void xics_teardown_cpu(void)
+{
+        int cpu = smp_processor_id();
+        int status;
+
+        ops->cppr_info(cpu, 0x00);
+        iosync();
+
+        /*
+         * we need to EOI the IPI if we got here from kexec down IPI
+         *
+         * xics doesn't care if we duplicate an EOI as long as we
+         * don't EOI and raise priority.
+         *
+         * probably need to check all the other interrupts too
+         * should we be flagging idle loop instead?
+         * or creating some task to be scheduled?
+         */
+        ops->xirr_info_set(cpu, XICS_IPI);
+
+        status = rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
+                (1UL << interrupt_server_size) - 1 - default_distrib_server, 0);
+        WARN_ON(status != 0);
+}
+
 #ifdef CONFIG_HOTPLUG_CPU
 
 /* Interrupts are disabled. */