[PATCH 1/7] qmp: Add query-sgx command

[Yang Zhong]

This QMP query command can be used by some userspaces to retrieve
the SGX information when SGX is enabled on Intel platform.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
---
 qapi/misc-target.json      | 43 ++++++++++++++++++++++++++++++++++++++
 target/i386/monitor.c      |  6 ++++++
 tests/qtest/qmp-cmd-test.c |  1 +
 3 files changed, 50 insertions(+)

diff --git a/qapi/misc-target.json b/qapi/misc-target.json
index 3b05ad3dbf..e2a347cc23 100644
--- a/qapi/misc-target.json
+++ b/qapi/misc-target.json
@@ -333,3 +333,46 @@
 { 'command': 'query-sev-attestation-report', 'data': { 'mnonce': 'str' },
   'returns': 'SevAttestationReport',
   'if': 'TARGET_I386' }
+
+##
+# @SGXInfo:
+#
+# Information about intel Safe Guard eXtension (SGX) support
+#
+# @sgx: true if SGX is supported
+#
+# @sgx1: true if SGX1 is supported
+#
+# @sgx2: true if SGX2 is supported
+#
+# @flc: true if FLC is supported
+#
+# @section-size: The EPC section size for guest
+#
+# Since: 6.2
+##
+{ 'struct': 'SGXInfo',
+  'data': { 'sgx': 'bool',
+            'sgx1': 'bool',
+            'sgx2': 'bool',
+            'flc': 'bool',
+            'section-size': 'uint64'},
+   'if': 'TARGET_I386' }
+
+##
+# @query-sgx:
+#
+# Returns information about SGX
+#
+# Returns: @SGXInfo
+#
+# Since: 6.2
+#
+# Example:
+#
+# -> { "execute": "query-sgx" }
+# <- { "return": { "sgx": true, "sgx1" : true, "sgx2" : true,
+#                  "flc": true, "section-size" : 0 } }
+#
+##
+{ 'command': 'query-sgx', 'returns': 'SGXInfo', 'if': 'TARGET_I386' }
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index 119211f0b0..942274c1c2 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -763,3 +763,9 @@ qmp_query_sev_attestation_report(const char *mnonce, Error 
**errp)
 {
     return sev_get_attestation_report(mnonce, errp);
 }
+
+SGXInfo *qmp_query_sgx(Error **errp)
+{
+    error_setg(errp, QERR_FEATURE_DISABLED, "query-sgx");
+    return NULL;
+}
diff --git a/tests/qtest/qmp-cmd-test.c b/tests/qtest/qmp-cmd-test.c
index c98b78d033..b75f3364f3 100644
--- a/tests/qtest/qmp-cmd-test.c
+++ b/tests/qtest/qmp-cmd-test.c
@@ -100,6 +100,7 @@ static bool query_is_ignored(const char *cmd)
         /* Success depends on Host or Hypervisor SEV support */
         "query-sev",
         "query-sev-capabilities",
+        "query-sgx",
         NULL
     };
     int i;