sev/i386: qmp: add query-sev-launch-measure command
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@redhat.com> Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -984,6 +984,7 @@ static void qmp_unregister_commands_hack(void)
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#ifndef TARGET_I386
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qmp_unregister_command(&qmp_commands, "rtc-reset-reinjection");
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qmp_unregister_command(&qmp_commands, "query-sev");
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qmp_unregister_command(&qmp_commands, "query-sev-launch-measure");
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#endif
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#ifndef TARGET_S390X
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qmp_unregister_command(&qmp_commands, "dump-skeys");
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@ -4110,6 +4111,12 @@ SevInfo *qmp_query_sev(Error **errp)
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error_setg(errp, QERR_FEATURE_DISABLED, "query-sev");
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return NULL;
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}
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SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
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{
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error_setg(errp, QERR_FEATURE_DISABLED, "query-sev-launch-measure");
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return NULL;
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}
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#endif
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#ifndef TARGET_S390X
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@ -3293,3 +3293,32 @@
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#
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##
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{ 'command': 'query-sev', 'returns': 'SevInfo' }
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##
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# @SevLaunchMeasureInfo:
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#
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# SEV Guest Launch measurement information
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#
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# @data: the measurement value encoded in base64
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#
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# Since: 2.12
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#
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##
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{ 'struct': 'SevLaunchMeasureInfo', 'data': {'data': 'str'} }
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##
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# @query-sev-launch-measure:
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#
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# Query the SEV guest launch information.
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#
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# Returns: The @SevLaunchMeasureInfo for the guest
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#
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# Since: 2.12
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#
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# Example:
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#
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# -> { "execute": "query-sev-launch-measure" }
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# <- { "return": { "data": "4l8LXeNlSPUDlXPJG5966/8%YZ" } }
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#
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##
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{ 'command': 'query-sev-launch-measure', 'returns': 'SevLaunchMeasureInfo' }
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@ -697,3 +697,20 @@ void hmp_info_sev(Monitor *mon, const QDict *qdict)
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monitor_printf(mon, "SEV is not enabled\n");
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}
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}
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SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
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{
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char *data;
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SevLaunchMeasureInfo *info;
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data = sev_get_launch_measurement();
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if (!data) {
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error_setg(errp, "Measurement is not available");
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return NULL;
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}
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info = g_malloc0(sizeof(*info));
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info->data = data;
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return info;
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}
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@ -204,6 +204,8 @@ static bool query_is_blacklisted(const char *cmd)
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"query-gic-capabilities", /* arm */
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/* Success depends on target-specific build configuration: */
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"query-pci", /* CONFIG_PCI */
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/* Success depends on launching SEV guest */
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"query-sev-launch-measure",
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/* Success depends on Host or Hypervisor SEV support */
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"query-sev",
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NULL
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