spapr: Add RTAS sysparm UUID

Add support for the UUID parameter to the emulated RTAS call
ibm,get-system-parameter.

Return the guest's UUID as the value for the RTAS UUID system
parameter, or null (a zero length result) if it is not set.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index ac9a8601ea..dba4e2b20b 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -240,6 +240,9 @@ static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
         rtas_st_buffer(buffer, length, &param_val, sizeof(param_val));
         break;
     }
+    case RTAS_SYSPARM_UUID:
+        rtas_st_buffer(buffer, length, qemu_uuid, (qemu_uuid_set ? 16 : 0));
+        break;
     default:
         ret = RTAS_OUT_NOT_SUPPORTED;
     }
@@ -258,6 +261,7 @@ static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
 
     switch (parameter) {
     case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
+    case RTAS_SYSPARM_UUID:
         ret = RTAS_OUT_NOT_AUTHORIZED;
         break;
     }