[qemu-s390x] [PATCH v5 08/17] spapr_irq: Expose the phandle of the interrupt controller

[Greg Kurz]

This will be used by PHB hotplug in order to create the "interrupt-map"
property of the PHB node.

Signed-off-by: Greg Kurz <address@hidden>
---
v5: - return phandle by value
v4: - return phandle via a pointer
---
 hw/ppc/spapr_irq.c         |   21 +++++++++++++++++++++
 include/hw/ppc/spapr_irq.h |    1 +
 2 files changed, 22 insertions(+)

diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index 359761494c6e..4145079d7fa5 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -638,6 +638,27 @@ void spapr_irq_reset(sPAPRMachineState *spapr, Error 
**errp)
     }
 }
 
+int spapr_irq_get_phandle(sPAPRMachineState *spapr, void *fdt, Error **errp)
+{
+    const char *nodename = spapr->irq->get_nodename(spapr);
+    int offset, phandle;
+
+    offset = fdt_subnode_offset(fdt, 0, nodename);
+    if (offset < 0) {
+        error_setg(errp, "Can't find node \"%s\": %s", nodename,
+                   fdt_strerror(offset));
+        return -1;
+    }
+
+    phandle = fdt_get_phandle(fdt, offset);
+    if (!phandle) {
+        error_setg(errp, "Can't get phandle of node \"%s\"", nodename);
+        return -1;
+    }
+
+    return phandle;
+}
+
 /*
  * XICS legacy routines - to deprecate one day
  */
diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h
index 8bf1a7291966..ec1ee64fa62b 100644
--- a/include/hw/ppc/spapr_irq.h
+++ b/include/hw/ppc/spapr_irq.h
@@ -61,6 +61,7 @@ void spapr_irq_free(sPAPRMachineState *spapr, int irq, int 
num);
 qemu_irq spapr_qirq(sPAPRMachineState *spapr, int irq);
 int spapr_irq_post_load(sPAPRMachineState *spapr, int version_id);
 void spapr_irq_reset(sPAPRMachineState *spapr, Error **errp);
+int spapr_irq_get_phandle(sPAPRMachineState *spapr, void *fdt, Error **errp);
 
 /*
  * XICS legacy routines