[v11,26/28] qmp: add query-sev-capabilities command

Commit Message

Brijesh Singh March 7, 2018, 4:50 p.m. UTC

The command can be used by libvirt to query the SEV capabilities.

Cc: "Daniel P. Berrangé" <[e-mail]>
Cc: "Dr. David Alan Gilbert" <[e-mail]>
Cc: Markus Armbruster <[e-mail]>
Signed-off-by: Brijesh Singh <[e-mail]>
---
 monitor.c             |  7 +++++++
 qapi/misc.json        | 42 ++++++++++++++++++++++++++++++++++++++++++
 target/i386/monitor.c |  6 ++++++
 3 files changed, 55 insertions(+)

Patch

diff --git a/monitor.c b/monitor.c
index d53ecc5ddab3..29ce695a80d5 100644
--- a/monitor.c
+++ b/monitor.c
@@ -985,6 +985,7 @@  static void qmp_unregister_commands_hack(void)
     qmp_unregister_command(&qmp_commands, "rtc-reset-reinjection");
     qmp_unregister_command(&qmp_commands, "query-sev");
     qmp_unregister_command(&qmp_commands, "query-sev-launch-measure");
+    qmp_unregister_command(&qmp_commands, "query-sev-capabilities");
 #endif
 #ifndef TARGET_S390X
     qmp_unregister_command(&qmp_commands, "dump-skeys");
@@ -4117,6 +4118,12 @@  SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
     error_setg(errp, QERR_FEATURE_DISABLED, "query-sev-launch-measure");
     return NULL;
 }
+
+SevCapability *qmp_query_sev_capabilities(Error **errp)
+{
+    error_setg(errp, QERR_FEATURE_DISABLED, "query-sev-capabilities");
+    return NULL;
+}
 #endif
 
 #ifndef TARGET_S390X
diff --git a/qapi/misc.json b/qapi/misc.json
index 66c8229ec406..f34848831a4b 100644
--- a/qapi/misc.json
+++ b/qapi/misc.json
@@ -3304,3 +3304,45 @@ 
 #
 ##
 { 'command': 'query-sev-launch-measure', 'returns': 'SevLaunchMeasureInfo' }
+
+##
+# @SevCapability:
+#
+# The struct describes capability for a Secure Encrypted Virtualization
+# feature.
+#
+# @pdh:  Platform Diffie-Hellman key
+#
+# @cert-chain:  PDH certificate chain
+#
+# @cbitpos: C-bit location in page table entry
+#
+# @reduced-phys-bits: Number of physical Address bit reduction when SEV is
+#                     enabled
+#
+# Since: 2.12
+##
+{ 'struct': 'SevCapability',
+  'data': { 'pdh': 'str',
+            'cert-chain': 'str',
+            'cbitpos': 'int',
+            'reduced-phys-bits': 'int'} }
+
+##
+# @query-sev-capabilities:
+#
+# This command is used to get the SEV capabilities, and is supported on AMD
+# X86 platforms only.
+#
+# Returns: SevCapability objects.
+#
+# Since: 2.12
+#
+# Example:
+#
+# -> { "execute": "query-sev-capabilities" }
+# <- { "return": { "pdh": "8CCDD8DDD", "cert-chain": "888CCCDDDEE",
+#                  "cbitpos": 47, "reduced-phys-bits": 5}}
+#
+##
+{ 'command': 'query-sev-capabilities', 'returns': 'SevCapability' }
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index e5596bbc0fc2..33e6bade693b 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -737,3 +737,9 @@  SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
 
     return info;
 }
+
+SevCapability *qmp_query_sev_capabilities(Error **errp)
+{
+    error_setg(errp, "SEV feature is not available");
+    return NULL;
+}