[Qemu-devel] [PATCH v7 23/27] pvpanic: add API to access io port

["Michael S. Tsirkin" <mst@redhat.com>]

Add API to find pvpanic device and get its io port.
Will be used to fill in guest info structure.

Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 include/hw/i386/pc.h |  1 +
 hw/misc/pvpanic.c    | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 2a5d996..61d1ee7 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -236,6 +236,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory,
 
 /* pvpanic.c */
 void pvpanic_init(ISABus *bus);
+uint16_t pvpanic_port(void);
 
 /* e820 types */
 #define E820_RAM        1
diff --git a/hw/misc/pvpanic.c b/hw/misc/pvpanic.c
index b64e3bb..226e298 100644
--- a/hw/misc/pvpanic.c
+++ b/hw/misc/pvpanic.c
@@ -117,8 +117,19 @@ void pvpanic_init(ISABus *bus)
     isa_create_simple(bus, TYPE_ISA_PVPANIC_DEVICE);
 }
 
+#define PVPANIC_IOPORT_PROP "ioport"
+
+uint16_t pvpanic_port(void)
+{
+    Object *o = object_resolve_path_type("", TYPE_ISA_PVPANIC_DEVICE, NULL);
+    if (!o) {
+        return 0;
+    }
+    return object_property_get_int(o, PVPANIC_IOPORT_PROP, NULL);
+}
+
 static Property pvpanic_isa_properties[] = {
-    DEFINE_PROP_UINT16("ioport", PVPanicState, ioport, 0x505),
+    DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
MST