1 files changed, 73 insertions, 0 deletions
diff --git a/hw/i386/sgx.c b/hw/i386/sgx.c
new file mode 100644
index 0000000000..8a18cddc3f
--- /dev/null
+++ b/hw/i386/sgx.c
@@ -0,0 +1,73 @@
+/*
+ * SGX common code
+ *
+ * Copyright (C) 2021 Intel Corporation
+ *
+ * Authors:
+ *   Yang Zhong<yang.zhong@intel.com>
+ *   Sean Christopherson <sean.j.christopherson@intel.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+#include "qemu/osdep.h"
+#include "hw/i386/pc.h"
+#include "hw/i386/sgx-epc.h"
+#include "hw/mem/memory-device.h"
+#include "monitor/qdev.h"
+#include "qapi/error.h"
+#include "exec/address-spaces.h"
+
+int sgx_epc_get_section(int section_nr, uint64_t *addr, uint64_t *size)
+{
+    PCMachineState *pcms = PC_MACHINE(qdev_get_machine());
+    SGXEPCDevice *epc;
+
+    if (pcms->sgx_epc.size == 0 || pcms->sgx_epc.nr_sections <= section_nr) {
+        return 1;
+    }
+
+    epc = pcms->sgx_epc.sections[section_nr];
+
+    *addr = epc->addr;
+    *size = memory_device_get_region_size(MEMORY_DEVICE(epc), &error_fatal);
+
+    return 0;
+}
+
+void pc_machine_init_sgx_epc(PCMachineState *pcms)
+{
+    SGXEPCState *sgx_epc = &pcms->sgx_epc;
+    X86MachineState *x86ms = X86_MACHINE(pcms);
+    SgxEPCList *list = NULL;
+    Object *obj;
+
+    memset(sgx_epc, 0, sizeof(SGXEPCState));
+    if (!x86ms->sgx_epc_list) {
+        return;
+    }
+
+    sgx_epc->base = 0x100000000ULL + x86ms->above_4g_mem_size;
+
+    memory_region_init(&sgx_epc->mr, OBJECT(pcms), "sgx-epc", UINT64_MAX);
+    memory_region_add_subregion(get_system_memory(), sgx_epc->base,
+                                &sgx_epc->mr);
+
+    for (list = x86ms->sgx_epc_list; list; list = list->next) {
+        obj = object_new("sgx-epc");
+
+        /* set the memdev link with memory backend */
+        object_property_parse(obj, SGX_EPC_MEMDEV_PROP, list->value->memdev,
+                              &error_fatal);
+        object_property_set_bool(obj, "realized", true, &error_fatal);
+        object_unref(obj);
+    }
+
+    if ((sgx_epc->base + sgx_epc->size) < sgx_epc->base) {
+        error_report("Size of all 'sgx-epc' =0x%"PRIu64" causes EPC to wrap",
+                     sgx_epc->size);
+        exit(EXIT_FAILURE);
+    }
+
+    memory_region_set_size(&sgx_epc->mr, sgx_epc->size);
+}