[IA64] Support irq migration across domain

Add support for IRQ migration across vector domain.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 17 insertions, 3 deletions

diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index e647254c2707..c101c8bff27b 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -354,11 +354,13 @@ iosapic_set_affinity (unsigned int irq, cpumask_t mask)
 
         irq &= (~IA64_IRQ_REDIRECTED);
 
-        /* IRQ migration across domain is not supported yet */
-        cpus_and(mask, mask, irq_to_domain(irq));
+        cpus_and(mask, mask, cpu_online_map);
         if (cpus_empty(mask))
                 return;
 
+        if (reassign_irq_vector(irq, first_cpu(mask)))
+                return;
+
         dest = cpu_physical_id(first_cpu(mask));
 
         if (list_empty(&iosapic_intr_info[irq].rtes))
@@ -376,6 +378,8 @@ iosapic_set_affinity (unsigned int irq, cpumask_t mask)
         else
                 /* change delivery mode to fixed */
                 low32 |= (IOSAPIC_FIXED << IOSAPIC_DELIVERY_SHIFT);
+        low32 &= IOSAPIC_VECTOR_MASK;
+        low32 |= irq_to_vector(irq);
 
         iosapic_intr_info[irq].low32 = low32;
         iosapic_intr_info[irq].dest = dest;
@@ -404,10 +408,20 @@ iosapic_end_level_irq (unsigned int irq)
 {
         ia64_vector vec = irq_to_vector(irq);
         struct iosapic_rte_info *rte;
+        int do_unmask_irq = 0;
+
+        if (unlikely(irq_desc[irq].status & IRQ_MOVE_PENDING)) {
+                do_unmask_irq = 1;
+                mask_irq(irq);
+        }
 
-        move_native_irq(irq);
         list_for_each_entry(rte, &iosapic_intr_info[irq].rtes, rte_list)
                 iosapic_eoi(rte->iosapic->addr, vec);
+
+        if (unlikely(do_unmask_irq)) {
+                move_masked_irq(irq);
+                unmask_irq(irq);
+        }
 }
 
 #define iosapic_shutdown_level_irq      mask_irq