[PATCH v2 2/2] mac_oldworld: Allow specifying nvram backing store

[BALATON Zoltan]

Add a way to set a backing store for the mac_nvram. Use -drive
file=nvram.img,format=raw,if=mtd to specify backing file where
nvram.img must be MACIO_NVRAM_SIZE which is 8192 bytes.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/ppc/mac_oldworld.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 558c639202..55190add55 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -102,7 +102,7 @@ static void ppc_heathrow_init(MachineState *machine)
     DeviceState *dev, *pic_dev, *grackle_dev;
     BusState *adb_bus;
     uint16_t ppc_boot_device;
-    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
+    DriveInfo *dinfo, *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
     void *fw_cfg;
     uint64_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TBFREQ;
 
@@ -245,6 +245,12 @@ static void ppc_heathrow_init(MachineState *machine)
     qdev_prop_set_chr(dev, "chrA", serial_hd(0));
     qdev_prop_set_chr(dev, "chrB", serial_hd(1));
 
+    dinfo = drive_get(IF_MTD, 0, 0);
+    if (dinfo) {
+        dev = DEVICE(object_resolve_path_component(macio, "nvram"));
+        qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(dinfo));
+    }
+
     pci_realize_and_unref(PCI_DEVICE(macio), pci_bus, &error_fatal);
 
     pic_dev = DEVICE(object_resolve_path_component(macio, "pic"));
-- 
2.30.6