ipmi: Add a UUID device property

Using the UUID that qemu generates probably isn't the best thing
to do, allow it to be passed in via properties, and use QemuUUID
for the type.

If the UUID is not set, return an unsupported command error.  This
way we are not providing an all-zero (or randomly generated) GUID
to the IPMI user.  This lets the host fall back to the other
method of using the get device id command to determind the BMC
being accessed.

Signed-off-by: Corey Minyard <cminyard@mvista.com>
Cc: Cédric Le Goater <clg@kaod.org>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 14 insertions, 8 deletions

diff --git a/hw/ipmi/ipmi_bmc_sim.c b/hw/ipmi/ipmi_bmc_sim.c
index 6e6cd1b..71e56f3 100644
--- a/hw/ipmi/ipmi_bmc_sim.c
+++ b/hw/ipmi/ipmi_bmc_sim.c
@@ -223,7 +223,7 @@ struct IPMIBmcSim {
     uint8_t restart_cause;
 
     uint8_t acpi_power_state[2];
-    uint8_t uuid[16];
+    QemuUUID uuid;
 
     IPMISel sel;
     IPMISdr sdr;
@@ -941,8 +941,19 @@ static void get_device_guid(IPMIBmcSim *ibs,
 {
     unsigned int i;
 
+    /* An uninitialized uuid is all zeros, use that to know if it is set. */
     for (i = 0; i < 16; i++) {
-        rsp_buffer_push(rsp, ibs->uuid[i]);
+        if (ibs->uuid.data[i]) {
+            goto uuid_set;
+        }
+    }
+    /* No uuid is set, return an error. */
+    rsp_buffer_set_error(rsp, IPMI_CC_INVALID_CMD);
+    return;
+
+ uuid_set:
+    for (i = 0; i < 16; i++) {
+        rsp_buffer_push(rsp, ibs->uuid.data[i]);
     }
 }
 
@@ -1986,12 +1997,6 @@ static void ipmi_sim_realize(DeviceState *dev, Error **errp)
     ibs->acpi_power_state[0] = 0;
     ibs->acpi_power_state[1] = 0;
 
-    if (qemu_uuid_set) {
-        memcpy(&ibs->uuid, &qemu_uuid, 16);
-    } else {
-        memset(&ibs->uuid, 0, 16);
-    }
-
     ipmi_init_sensors_from_sdrs(ibs);
     register_cmds(ibs);
 
@@ -2011,6 +2016,7 @@ static Property ipmi_sim_properties[] = {
     DEFINE_PROP_UINT8("fwrev2", IPMIBmcSim, fwrev2, 0),
     DEFINE_PROP_UINT32("mfg_id", IPMIBmcSim, mfg_id, 0),
     DEFINE_PROP_UINT16("product_id", IPMIBmcSim, product_id, 0),
+    DEFINE_PROP_UUID_NODEFAULT("guid", IPMIBmcSim, uuid),
     DEFINE_PROP_END_OF_LIST(),
 };