cryptodev: Support query-stats QMP command

Now we can use "query-stats" QMP command to query statistics of
crypto devices. (Originally this was designed to show statistics
by '{"execute": "query-cryptodev"}'. Daniel Berrangé suggested that
querying configuration info by "query-cryptodev", and querying
runtime performance info by "query-stats". This makes sense!)

Example:
~# virsh qemu-monitor-command vm '{"execute": "query-stats", \
   "arguments": {"target": "cryptodev"} }' | jq
{
  "return": [
    {
      "provider": "cryptodev",
      "stats": [
        {
          "name": "asym-verify-bytes",
          "value": 7680
        },
        ...
        {
          "name": "asym-decrypt-ops",
          "value": 32
        },
        {
          "name": "asym-encrypt-ops",
          "value": 48
        }
      ],
      "qom-path": "/objects/cryptodev0" # support asym only
    },
    {
      "provider": "cryptodev",
      "stats": [
        {
          "name": "asym-verify-bytes",
          "value": 0
        },
        ...
        {
          "name": "sym-decrypt-bytes",
          "value": 5376
        },
        ...
      ],
      "qom-path": "/objects/cryptodev1" # support asym/sym
    }
  ],
  "id": "libvirt-422"
}

Suggested-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230301105847.253084-12-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/stats/stats-hmp-cmds.c b/stats/stats-hmp-cmds.c
index 531e35d128..1f91bf8bd5 100644
--- a/stats/stats-hmp-cmds.c
+++ b/stats/stats-hmp-cmds.c
@@ -155,6 +155,8 @@ static StatsFilter *stats_filter(StatsTarget target, const char *names,
         filter->u.vcpu.vcpus = vcpu_list;
         break;
     }
+    case STATS_TARGET_CRYPTODEV:
+        break;
     default:
         break;
     }
@@ -226,6 +228,9 @@ void hmp_info_stats(Monitor *mon, const QDict *qdict)
         int cpu_index = monitor_get_cpu_index(mon);
         filter = stats_filter(target, names, cpu_index, provider);
         break;
+    case STATS_TARGET_CRYPTODEV:
+        filter = stats_filter(target, names, -1, provider);
+        break;
     default:
         abort();
     }
diff --git a/stats/stats-qmp-cmds.c b/stats/stats-qmp-cmds.c
index bc973747fb..e214b964fd 100644
--- a/stats/stats-qmp-cmds.c
+++ b/stats/stats-qmp-cmds.c
@@ -64,6 +64,8 @@ static bool invoke_stats_cb(StatsCallbacks *entry,
             targets = filter->u.vcpu.vcpus;
         }
         break;
+    case STATS_TARGET_CRYPTODEV:
+        break;
     default:
         abort();
     }