spapr/irq: Introduce an ics_irq_free() helper

It will help us to discard interrupt numbers which have not been
claimed in the next patch.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190911133937.2716-2-clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index 06fe2432bae542bb1ff9a822b8a9ea8f845ec170..d8f46b6797f8283a388bc3b9c82f992080fe8208 100644 (file)
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -114,9 +114,6 @@ static void spapr_irq_init_xics(SpaprMachineState *spapr, int nr_irqs,
     xics_spapr_init(spapr);
 }
 
-#define ICS_IRQ_FREE(ics, srcno)   \
-    (!((ics)->irqs[(srcno)].flags & (XICS_FLAGS_IRQ_MASK)))
-
 static int spapr_irq_claim_xics(SpaprMachineState *spapr, int irq, bool lsi,
                                 Error **errp)
 {
@@ -129,7 +126,7 @@ static int spapr_irq_claim_xics(SpaprMachineState *spapr, int irq, bool lsi,
         return -1;
     }
 
-    if (!ICS_IRQ_FREE(ics, irq - ics->offset)) {
+    if (!ics_irq_free(ics, irq - ics->offset)) {
         error_setg(errp, "IRQ %d is not free", irq);
         return -1;
     }
@@ -147,7 +144,7 @@ static void spapr_irq_free_xics(SpaprMachineState *spapr, int irq, int num)
     if (ics_valid_irq(ics, irq)) {
         trace_spapr_irq_free(0, irq, num);
         for (i = srcno; i < srcno + num; ++i) {
-            if (ICS_IRQ_FREE(ics, i)) {
+            if (ics_irq_free(ics, i)) {
                 trace_spapr_irq_free_warn(0, i);
             }
             memset(&ics->irqs[i], 0, sizeof(ICSIRQState));
@@ -767,7 +764,7 @@ static int ics_find_free_block(ICSState *ics, int num, int alignnum)
             return -1;
         }
         for (i = first; i < first + num; ++i) {
-            if (!ICS_IRQ_FREE(ics, i)) {
+            if (!ics_irq_free(ics, i)) {
                 break;
             }
         }

diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
index f2a8d6a4b4f99b975eb4c051797cbb0cada29a49..64a2c8862a729940fc2600a977ea83499c21b498 100644 (file)
--- a/include/hw/ppc/xics.h
+++ b/include/hw/ppc/xics.h
@@ -179,6 +179,11 @@ void ics_simple_write_xive(ICSState *ics, int nr, int server,
                            uint8_t priority, uint8_t saved_priority);
 void ics_simple_set_irq(void *opaque, int srcno, int val);
 
+static inline bool ics_irq_free(ICSState *ics, uint32_t srcno)
+{
+    return !(ics->irqs[srcno].flags & XICS_FLAGS_IRQ_MASK);
+}
+
 void ics_set_irq_type(ICSState *ics, int srcno, bool lsi);
 void icp_pic_print_info(ICPState *icp, Monitor *mon);
 void ics_pic_print_info(ICSState *ics, Monitor *mon);