The command can be used by libvirt to retrieve the measurement of SEV guest.
This measurement is a signature of the memory contents that was encrypted
through the LAUNCH_UPDATE_DATA.
Cc: "Daniel P. Berrangé" <berrange@xxxxxxxxxx>
Cc: "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>
Cc: Markus Armbruster <armbru@xxxxxxxxxx>
Reviewed-by: Eric Blake <eblake@xxxxxxxxxx>
Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx>
---
monitor.c | 7 +++++++
qapi/misc.json | 29 +++++++++++++++++++++++++++++
target/i386/monitor.c | 17 +++++++++++++++++
3 files changed, 53 insertions(+)
diff --git a/monitor.c b/monitor.c
index 2225cf5030dc..d53ecc5ddab3 100644
--- a/monitor.c
+++ b/monitor.c
@@ -984,6 +984,7 @@ static void qmp_unregister_commands_hack(void)
#ifndef TARGET_I386
qmp_unregister_command(&qmp_commands, "rtc-reset-reinjection");
qmp_unregister_command(&qmp_commands, "query-sev");
+ qmp_unregister_command(&qmp_commands, "query-sev-launch-measure");
#endif
#ifndef TARGET_S390X
qmp_unregister_command(&qmp_commands, "dump-skeys");
@@ -4110,6 +4111,12 @@ SevInfo *qmp_query_sev(Error **errp)
error_setg(errp, QERR_FEATURE_DISABLED, "query-sev");
return NULL;
}
+
+SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
+{
+ error_setg(errp, QERR_FEATURE_DISABLED, "query-sev-launch-measure");
+ return NULL;
+}
#endif
#ifndef TARGET_S390X
diff --git a/qapi/misc.json b/qapi/misc.json
index 14681729f8fc..a39c43aa64b1 100644
--- a/qapi/misc.json
+++ b/qapi/misc.json
@@ -3277,3 +3277,32 @@
#
##
{ 'command': 'query-sev', 'returns': 'SevInfo' }
+
+##
+# @SevLaunchMeasureInfo:
+#
+# SEV Guest Launch measurement information
+#
+# @data: the measurement value encoded in base64
+#
+# Since: 2.12
+#
+##
+{ 'struct': 'SevLaunchMeasureInfo', 'data': {'data': 'str'} }
+
+##
+# @query-sev-launch-measure:
+#
+# Query the SEV guest launch information.
+#
+# Returns: The @SevLaunchMeasureInfo for the guest
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev-launch-measure" }
+# <- { "return": { "data": "4l8LXeNlSPUDlXPJG5966/8%YZ" } }
+#
+##
+{ 'command': 'query-sev-launch-measure', 'returns': 'SevLaunchMeasureInfo' }
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 7df31c3cdf1b..e5596bbc0fc2 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -720,3 +720,20 @@ void hmp_info_sev(Monitor *mon, const QDict *qdict)
monitor_printf(mon, "SEV is not enabled\n");
}
}
+
+SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
+{
+ char *data;
+ SevLaunchMeasureInfo *info;
+
+ data = sev_get_launch_measurement();
+ if (!data) {
+ error_setg(errp, "Measurement is not available");
+ return NULL;
+ }
+
+ info = g_malloc0(sizeof(*info));
+ info->data = data;
+
+ return info;
+}
--
2.14.3
