qmp: add architecture specific cpu data for query-cpus-fast

The s390 CPU state can be retrieved without interrupting the
VM execution. Extendend the CpuInfoFast union with architecture
specific data and an implementation for s390.

Return data looks like this:
 [
   {"thread-id":64301,"props":{"core-id":0},
    "arch":"s390","cpu-state":"operating",
    "qom-path":"/machine/unattached/device[0]","cpu-index":0},
   {"thread-id":64302,"props":{"core-id":1},
    "arch":"s390","cpu-state":"operating",
    "qom-path":"/machine/unattached/device[1]","cpu-index":1}
]

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1518797321-28356-4-git-send-email-mihajlov@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

diff --git a/cpus.c b/cpus.c
index 6df6660ccf3e4d807f1b87b78045401f46793bfd..af678264f6e2f477b3670d902e381a14fc123a0f 100644 (file)
--- a/cpus.c
+++ b/cpus.c
@@ -2166,6 +2166,10 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
     MachineClass *mc = MACHINE_GET_CLASS(ms);
     CpuInfoFastList *head = NULL, *cur_item = NULL;
     CPUState *cpu;
+#if defined(TARGET_S390X)
+    S390CPU *s390_cpu;
+    CPUS390XState *env;
+#endif
 
     CPU_FOREACH(cpu) {
         CpuInfoFastList *info = g_malloc0(sizeof(*info));
@@ -2183,6 +2187,12 @@ CpuInfoFastList *qmp_query_cpus_fast(Error **errp)
             info->value->props = props;
         }
 
+#if defined(TARGET_S390X)
+        s390_cpu = S390_CPU(cpu);
+        env = &s390_cpu->env;
+        info->value->arch = CPU_INFO_ARCH_S390;
+        info->value->u.s390.cpu_state = env->cpu_state;
+#endif
         if (!cur_item) {
             head = cur_item = info;
         } else {

diff --git a/qapi-schema.json b/qapi-schema.json
index 815f072876ed998485724fa5cb273773dd0fe4b4..e6ca63f71852c7bf0173b090f669c804fc304da1 100644 (file)
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -408,7 +408,7 @@
 # @CpuInfoArch:
 #
 # An enumeration of cpu types that enable additional information during
-# @query-cpus.
+# @query-cpus and @query-cpus-fast.
 #
 # @s390: since 2.12
 #
@@ -604,12 +604,24 @@
 # @props: properties describing to which node/socket/core/thread
 #         virtual CPU belongs to, provided if supported by board
 #
+# @arch: architecture of the cpu, which determines which additional fields
+#        will be listed
+#
 # Since: 2.12
 #
 ##
-{ 'struct': 'CpuInfoFast',
-  'data': {'cpu-index': 'int', 'qom-path': 'str',
-           'thread-id': 'int', '*props': 'CpuInstanceProperties' } }
+{ 'union': 'CpuInfoFast',
+  'base': {'cpu-index': 'int', 'qom-path': 'str',
+           'thread-id': 'int', '*props': 'CpuInstanceProperties',
+           'arch': 'CpuInfoArch' },
+  'discriminator': 'arch',
+  'data': { 'x86': 'CpuInfoOther',
+            'sparc': 'CpuInfoOther',
+            'ppc': 'CpuInfoOther',
+            'mips': 'CpuInfoOther',
+            'tricore': 'CpuInfoOther',
+            's390': 'CpuInfoS390',
+            'other': 'CpuInfoOther' } }
 
 ##
 # @query-cpus-fast:
@@ -620,9 +632,6 @@
 #
 # Returns: list of @CpuInfoFast
 #
-# Notes: The CPU architecture name is not returned by query-cpus-fast.
-#        Use query-target to retrieve that information.
-#
 # Since: 2.12
 #
 # Example:
@@ -637,6 +646,7 @@
 #                 "socket-id": 0
 #             },
 #             "qom-path": "/machine/unattached/device[0]",
+#             "arch":"x86",
 #             "cpu-index": 0
 #         },
 #         {
@@ -647,6 +657,7 @@
 #                 "socket-id": 1
 #             },
 #             "qom-path": "/machine/unattached/device[2]",
+#             "arch":"x86",
 #             "cpu-index": 1
 #         }
 #     ]