[Qemu-devel] [PATCH v4 05/15] 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.

Reviewed-by: Cédric Le Goater <c...@kaod.org>
Signed-off-by: Greg Kurz <gr...@kaod.org>
---
v4: - return phandle via a pointer
---
 hw/ppc/spapr_irq.c         |   26 ++++++++++++++++++++++++++
 include/hw/ppc/spapr_irq.h |    2 ++
 2 files changed, 28 insertions(+)

diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index b8d725e251ba..31495033c37c 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -692,6 +692,32 @@ void spapr_irq_reset(sPAPRMachineState *spapr, Error 
**errp)
     }
 }
 
+int spapr_irq_get_phandle(sPAPRMachineState *spapr, void *fdt,
+                          uint32_t *phandle, Error **errp)
+{
+    const char *nodename = spapr->irq->get_nodename(spapr);
+    int offset, ph;
+
+    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;
+    }
+
+    ph = fdt_get_phandle(fdt, offset);
+    if (!ph) {
+        error_setg(errp, "Can't get phandle of node \"%s\"", nodename);
+        return -1;
+    }
+
+    if (phandle) {
+        *phandle = ph;
+    }
+
+    return 0;
+}
+
 /*
  * XICS legacy routines - to deprecate one day
  */
diff --git a/include/hw/ppc/spapr_irq.h b/include/hw/ppc/spapr_irq.h
index ad7127355441..4b3303ef4f6a 100644
--- a/include/hw/ppc/spapr_irq.h
+++ b/include/hw/ppc/spapr_irq.h
@@ -62,6 +62,8 @@ 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,
+                          uint32_t *phandle, Error **errp);
 
 /*
  * XICS legacy routines