[PATCH 3/7] i386: Add sgx_get_info() interface

[Yang Zhong]

Add the sgx_get_info() interface for hmp and QMP usage, which
will get the SGX info from this API.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
---
 hw/i386/sgx.c         | 21 +++++++++++++++++++++
 include/hw/i386/sgx.h | 11 +++++++++++
 target/i386/monitor.c | 32 ++++++++++++++++++++++++++++----
 3 files changed, 60 insertions(+), 4 deletions(-)
 create mode 100644 include/hw/i386/sgx.h

diff --git a/hw/i386/sgx.c b/hw/i386/sgx.c
index 5f988c6368..a3cd671a70 100644
--- a/hw/i386/sgx.c
+++ b/hw/i386/sgx.c
@@ -17,6 +17,27 @@
 #include "monitor/qdev.h"
 #include "qapi/error.h"
 #include "exec/address-spaces.h"
+#include "hw/i386/sgx.h"
+
+SGXInfo *sgx_get_info(void)
+{
+    SGXInfo *info = NULL;
+    MachineState *ms = MACHINE(qdev_get_machine());
+    X86MachineState *x86ms = X86_MACHINE(qdev_get_machine());
+
+    if (x86ms->sgx_epc_list) {
+        PCMachineState *pcms = PC_MACHINE(ms);
+        SGXEPCState *sgx_epc = &pcms->sgx_epc;
+        info = g_new0(SGXInfo, 1);
+
+        info->sgx = true;
+        info->sgx1 = true;
+        info->sgx2 = true;
+        info->flc = true;
+        info->section_size = sgx_epc->size;
+    }
+    return info;
+}
 
 int sgx_epc_get_section(int section_nr, uint64_t *addr, uint64_t *size)
 {
diff --git a/include/hw/i386/sgx.h b/include/hw/i386/sgx.h
new file mode 100644
index 0000000000..ea8672f8eb
--- /dev/null
+++ b/include/hw/i386/sgx.h
@@ -0,0 +1,11 @@
+#ifndef QEMU_SGX_H
+#define QEMU_SGX_H
+
+#include "qom/object.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "qapi/qapi-types-misc-target.h"
+
+SGXInfo *sgx_get_info(void);
+
+#endif
diff --git a/target/i386/monitor.c b/target/i386/monitor.c
index f1861fe6c2..0f1b48b4f8 100644
--- a/target/i386/monitor.c
+++ b/target/i386/monitor.c
@@ -35,6 +35,7 @@
 #include "qapi/qapi-commands-misc-target.h"
 #include "qapi/qapi-commands-misc.h"
 #include "hw/i386/pc.h"
+#include "hw/i386/sgx.h"
 
 /* Perform linear address sign extension */
 static hwaddr addr_canonical(CPUArchState *env, hwaddr addr)
@@ -766,12 +767,35 @@ qmp_query_sev_attestation_report(const char *mnonce, 
Error **errp)
 
 SGXInfo *qmp_query_sgx(Error **errp)
 {
-    error_setg(errp, QERR_FEATURE_DISABLED, "query-sgx");
-    return NULL;
+    SGXInfo *info;
+
+    info = sgx_get_info();
+    if (!info) {
+        error_setg(errp, "SGX features are not available");
+        return NULL;
+    }
+
+    return info;
 }
 
 void hmp_info_sgx(Monitor *mon, const QDict *qdict)
 {
-    error_setg(errp, QERR_FEATURE_DISABLED, "query-sgx");
-    return NULL;
+    SGXInfo *info = qmp_query_sgx(NULL);
+
+    if (info && info->sgx) {
+        monitor_printf(mon, "SGX support: %s\n",
+                       info->sgx ? "enabled" : "disabled");
+        monitor_printf(mon, "SGX1 support: %s\n",
+                       info->sgx1 ? "enabled" : "disabled");
+        monitor_printf(mon, "SGX2 support: %s\n",
+                       info->sgx2 ? "enabled" : "disabled");
+        monitor_printf(mon, "FLC support: %s\n",
+                       info->flc ? "enabled" : "disabled");
+        monitor_printf(mon, "size: %" PRIu64 "\n",
+                       info->section_size);
+    } else {
+        monitor_printf(mon, "SGX is not enabled\n");
+    }
+
+    qapi_free_SGXInfo(info);
 }