[v4,28/33] i386: Add sgx_get_info() interface

diff --git a/hw/i386/sgx.c b/hw/i386/sgx.c
index 5f988c6368..beff7e3cf0 100644
--- a/hw/i386/sgx.c
+++ b/hw/i386/sgx.c
@@ -18,6 +18,26 @@ 
 #include "qapi/error.h"
 #include "exec/address-spaces.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)
 {
     PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index c725dfef5b..de351ec48a 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -206,6 +206,7 @@  extern const size_t pc_compat_6_0_len;
 void pc_machine_init_sgx_epc(PCMachineState *pcms);
 void sgx_memory_backend_reset(HostMemoryBackend *backend, int fd,
                               Error **errp);
+SGXInfo *sgx_get_info(void);
 
 extern GlobalProperty pc_compat_5_2[];
 extern const size_t pc_compat_5_2_len;
diff --git a/include/hw/i386/sgx-epc.h b/include/hw/i386/sgx-epc.h
index 155e8fad3e..8f9c7becb9 100644
--- a/include/hw/i386/sgx-epc.h
+++ b/include/hw/i386/sgx-epc.h
@@ -13,6 +13,7 @@ 
 #define QEMU_SGX_EPC_H
 
 #include "sysemu/hostmem.h"
+#include "qapi/qapi-types-misc.h"
 
 #define TYPE_SGX_EPC "sgx-epc"
 #define SGX_EPC(obj) \
diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c
index 9ebc86190f..053d210535 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -2233,6 +2233,22 @@  void hmp_info_memory_size_summary(Monitor *mon, const QDict *qdict)
 
 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);
 }
diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c
index d63d59149f..48f7708ffe 100644
--- a/monitor/qmp-cmds.c
+++ b/monitor/qmp-cmds.c
@@ -40,6 +40,7 @@ 
 #include "qapi/qmp/qerror.h"
 #include "hw/mem/memory-device.h"
 #include "hw/acpi/acpi_dev_interface.h"
+#include "hw/i386/pc.h"
 
 NameInfo *qmp_query_name(Error **errp)
 {
@@ -354,6 +355,13 @@  void qmp_display_reload(DisplayReloadOptions *arg, 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;
 }
diff --git a/stubs/meson.build b/stubs/meson.build
index d3fa8646b3..d6788c3614 100644
--- a/stubs/meson.build
+++ b/stubs/meson.build
@@ -57,3 +57,4 @@  if have_system
 else
   stub_ss.add(files('qdev.c'))
 endif
+stub_ss.add(files('sgx-stub.c'))
diff --git a/stubs/sgx-stub.c b/stubs/sgx-stub.c
new file mode 100644
index 0000000000..c2b59a88fd
--- /dev/null
+++ b/stubs/sgx-stub.c
@@ -0,0 +1,7 @@ 
+#include "qemu/osdep.h"
+#include "hw/i386/pc.h"
+
+SGXInfo *sgx_get_info(void)
+{
+    return NULL;
+}