[PATCH v2 27/32] 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-epc.c         | 22 ++++++++++++++++++++++
 include/hw/i386/pc.h      |  1 +
 include/hw/i386/sgx-epc.h |  1 +
 monitor/hmp-cmds.c        | 20 ++++++++++++++++++--
 monitor/qmp-cmds.c        | 12 ++++++++++--
 stubs/meson.build         |  1 +
 stubs/sgx-stub.c          |  7 +++++++
 7 files changed, 60 insertions(+), 4 deletions(-)
 create mode 100644 stubs/sgx-stub.c

diff --git a/hw/i386/sgx-epc.c b/hw/i386/sgx-epc.c
index fbacec6e00..7daea0613b 100644
--- a/hw/i386/sgx-epc.c
+++ b/hw/i386/sgx-epc.c
@@ -322,6 +322,28 @@ void pc_machine_init_sgx_epc(PCMachineState *pcms)
     memory_region_set_size(&sgx_epc->mr, sgx_epc->size);
 }
 
+SGXInfo *sgx_get_info(void)
+{
+    SGXInfo *info;
+
+    info = g_new0(SGXInfo, 1);
+    if (sgx_epc_enabled) {
+        PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
+        SGXEPCState *sgx_epc = pcms->sgx_epc;
+
+        info->sgx = true;
+        info->sgx1 = true;
+        info->sgx2 = true;
+        info->flc = true;
+
+        if (sgx_epc) {
+            info->section_size = sgx_epc->size;
+        }
+    }
+
+    return info;
+}
+
 static QemuOptsList sgx_epc_opts = {
     .name = "sgx-epc",
     .implied_opt_name = "id",
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index a9167e3c3f..021de8026f 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -207,6 +207,7 @@ 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 743d0a943c..30a1c61b60 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 1d1efca713..bd539e0c1e 100644
--- a/monitor/hmp-cmds.c
+++ b/monitor/hmp-cmds.c
@@ -2229,6 +2229,22 @@ 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 be6f6d609e..1cba20a9a8 100644
--- a/stubs/meson.build
+++ b/stubs/meson.build
@@ -54,3 +54,4 @@ 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;
+}
-- 
2.29.2.334.gfaefdd61ec