[Qemu-devel] [PATCH 3/5] spapr_nvram: Pre-initialize the NVRAM to support the -prom-env parameter

[Thomas Huth <thuth@redhat.com>]

In case we do not load the NVRAM contents from a file, use the new
CHRP NVRAM helper functions to pre-initialize the NVRAM partitions.
This way we can support the "-prom-env" parameter of QEMU on the
pseries machine, too.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 hw/nvram/spapr_nvram.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/hw/nvram/spapr_nvram.c b/hw/nvram/spapr_nvram.c
index 4de5f70..36a9188 100644
--- a/hw/nvram/spapr_nvram.c
+++ b/hw/nvram/spapr_nvram.c
@@ -31,6 +31,7 @@
 #include "sysemu/block-backend.h"
 #include "sysemu/device_tree.h"
 #include "hw/sysbus.h"
+#include "hw/nvram/chrp_nvram.h"
 #include "hw/ppc/spapr.h"
 #include "hw/ppc/spapr_vio.h"
 
@@ -162,6 +163,11 @@ static void spapr_nvram_realize(VIOsPAPRDevice *dev, Error **errp)
             error_setg(errp, "can't read spapr-nvram contents");
             return;
         }
+    } else {
+        /* Create a system partition to pass the -prom-env variables */
+        chrp_nvram_create_system_partition(nvram->buf, MIN_NVRAM_SIZE / 4);
+        chrp_nvram_create_free_partition(&nvram->buf[MIN_NVRAM_SIZE / 4],
+                                         nvram->size - MIN_NVRAM_SIZE / 4);
     }
 
     spapr_rtas_register(RTAS_NVRAM_FETCH, "nvram-fetch", rtas_nvram_fetch);
-- 
1.8.3.1