[Qemu-devel] [PATCH v7 13/26] qmp: add query-sev command

[Brijesh Singh]

The QMP query command can used to retrieve the SEV information when
memory encryption is enabled on AMD platform.

Cc: "Daniel P. Berrangé" <address@hidden>
Cc: "Dr. David Alan Gilbert" <address@hidden>
Cc: Markus Armbruster <address@hidden>
Signed-off-by: Brijesh Singh <address@hidden>
---
 qapi-schema.json | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 qmp.c            | 16 ++++++++++++++++
 2 files changed, 63 insertions(+)

diff --git a/qapi-schema.json b/qapi-schema.json
index 5c06745c7927..447ebb15266e 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -3189,3 +3189,50 @@
 # Since: 2.11
 ##
 { 'command': 'watchdog-set-action', 'data' : {'action': 'WatchdogAction'} }
+
+##
+# @SevInfo:
+#
+# Information about SEV support
+#
+# @enabled: true if SEV is active
+#
+# @api_major: SEV API major version
+#
+# @api_minor: SEV API minor version
+#
+# @build_id: SEV FW build id
+#
+# @policy: SEV policy value
+#
+# @state: SEV guest state
+#
+# Since: 2.12
+##
+{ 'struct': 'SevInfo',
+    'data': { 'enabled': 'bool',
+              'api_major': 'uint8',
+              'api_minor' : 'uint8',
+              'build_id' : 'uint8',
+              'policy' : 'uint32',
+              'state' : 'str'
+            }
+}
+
+##
+# @query-sev:
+#
+# Returns information about SEV
+#
+# Returns: @SevInfo
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev" }
+# <- { "return": { "enabled": true, "api-major" : 0, "api-minor" : 0,
+#                  "build-id" : 0, "policy" : 0, "state" : "running" } }
+#
+##
+{ 'command': 'query-sev', 'returns': 'SevInfo' }
diff --git a/qmp.c b/qmp.c
index 52cfd2d81c0f..1a5cfad09dd0 100644
--- a/qmp.c
+++ b/qmp.c
@@ -37,6 +37,7 @@
 #include "qom/object_interfaces.h"
 #include "hw/mem/pc-dimm.h"
 #include "hw/acpi/acpi_dev_interface.h"
+#include "sysemu/sev.h"
 
 NameInfo *qmp_query_name(Error **errp)
 {
@@ -717,3 +718,18 @@ MemoryInfo *qmp_query_memory_size_summary(Error **errp)
 
     return mem_info;
 }
+
+SevInfo *qmp_query_sev(Error **errp)
+{
+    SevInfo *info = g_malloc0(sizeof(*info));
+
+    info->enabled = sev_enabled();
+    if (info->enabled) {
+        sev_get_fw_version(&info->api_major,
+                           &info->api_minor, &info->build_id);
+        sev_get_policy(&info->policy);
+        sev_get_current_state(&info->state);
+    }
+
+    return info;
+}
-- 
2.14.3