spapr: add uuid/host details to device tree

Useful for identifying the guest/host uniquely within the
guest. Adding following properties to the guest root node.

vm,uuid - uuid of the guest
host-model - Host model number
host-serial - Host machine serial number
hypervisor type - Tells its "kvm"

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

2 files changed, 24 insertions, 1 deletions

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 42718f77ae..8c9e79c3a9 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -1369,7 +1369,7 @@ static int read_cpuinfo(const char *field, char *value, int len)
     }
 
     do {
-        if(!fgets(line, sizeof(line), f)) {
+        if (!fgets(line, sizeof(line), f)) {
             break;
         }
         if (!strncmp(line, field, field_len)) {
@@ -1404,6 +1404,17 @@ uint32_t kvmppc_get_tbfreq(void)
     return retval;
 }
 
+bool kvmppc_get_host_serial(char **value)
+{
+    return g_file_get_contents("/proc/device-tree/system-id", value, NULL,
+                               NULL);
+}
+
+bool kvmppc_get_host_model(char **value)
+{
+    return g_file_get_contents("/proc/device-tree/model", value, NULL, NULL);
+}
+
 /* Try to find a device tree node for a CPU with clock-frequency property */
 static int kvmppc_find_cpu_dt(char *buf, int buf_len)
 {
diff --git a/target-ppc/kvm_ppc.h b/target-ppc/kvm_ppc.h
index d9516e73ef..2e0224c6af 100644
--- a/target-ppc/kvm_ppc.h
+++ b/target-ppc/kvm_ppc.h
@@ -19,6 +19,8 @@ uint32_t kvmppc_get_tbfreq(void);
 uint64_t kvmppc_get_clockfreq(void);
 uint32_t kvmppc_get_vmx(void);
 uint32_t kvmppc_get_dfp(void);
+bool kvmppc_get_host_model(char **buf);
+bool kvmppc_get_host_serial(char **buf);
 int kvmppc_get_hasidle(CPUPPCState *env);
 int kvmppc_get_hypercall(CPUPPCState *env, uint8_t *buf, int buf_len);
 int kvmppc_set_interrupt(PowerPCCPU *cpu, int irq, int level);
@@ -60,6 +62,16 @@ static inline uint32_t kvmppc_get_tbfreq(void)
     return 0;
 }
 
+static inline bool kvmppc_get_host_model(char **buf)
+{
+    return false;
+}
+
+static inline bool kvmppc_get_host_serial(char **buf)
+{
+    return false;
+}
+
 static inline uint64_t kvmppc_get_clockfreq(void)
 {
     return 0;