3 files changed, 67 insertions, 1 deletions
diff --git a/accel/kvm/Makefile.objs b/accel/kvm/Makefile.objs
index 85351e7de7..fdfa481578 100644
--- a/accel/kvm/Makefile.objs
+++ b/accel/kvm/Makefile.objs
@@ -1 +1,2 @@
-obj-$(CONFIG_KVM) += kvm-all.o
+obj-y += kvm-all.o
+obj-$(call lnot,$(CONFIG_SEV)) += sev-stub.o
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index b91fcb7160..ffee68e603 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -38,6 +38,7 @@
 #include "qemu/event_notifier.h"
 #include "trace.h"
 #include "hw/irq.h"
+#include "sysemu/sev.h"
 
 #include "hw/boards.h"
 
@@ -103,6 +104,10 @@ struct KVMState
 #endif
     KVMMemoryListener memory_listener;
     QLIST_HEAD(, KVMParkedVcpu) kvm_parked_vcpus;
+
+    /* memory encryption */
+    void *memcrypt_handle;
+    int (*memcrypt_encrypt_data)(void *handle, uint8_t *ptr, uint64_t len);
 };
 
 KVMState *kvm_state;
@@ -138,6 +143,26 @@ int kvm_get_max_memslots(void)
     return s->nr_slots;
 }
 
+bool kvm_memcrypt_enabled(void)
+{
+    if (kvm_state && kvm_state->memcrypt_handle) {
+        return true;
+    }
+
+    return false;
+}
+
+int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
+{
+    if (kvm_state->memcrypt_handle &&
+        kvm_state->memcrypt_encrypt_data) {
+        return kvm_state->memcrypt_encrypt_data(kvm_state->memcrypt_handle,
+                                              ptr, len);
+    }
+
+    return 1;
+}
+
 static KVMSlot *kvm_get_free_slot(KVMMemoryListener *kml)
 {
     KVMState *s = kvm_state;
@@ -1636,6 +1661,20 @@ static int kvm_init(MachineState *ms)
 
     kvm_state = s;
 
+    /*
+     * if memory encryption object is specified then initialize the memory
+     * encryption context.
+     */
+    if (ms->memory_encryption) {
+        kvm_state->memcrypt_handle = sev_guest_init(ms->memory_encryption);
+        if (!kvm_state->memcrypt_handle) {
+            ret = -1;
+            goto err;
+        }
+
+        kvm_state->memcrypt_encrypt_data = sev_encrypt_data;
+    }
+
     ret = kvm_arch_init(ms, s);
     if (ret < 0) {
         goto err;
diff --git a/accel/kvm/sev-stub.c b/accel/kvm/sev-stub.c
new file mode 100644
index 0000000000..4f97452585
--- /dev/null
+++ b/accel/kvm/sev-stub.c
@@ -0,0 +1,26 @@
+/*
+ * QEMU SEV stub
+ *
+ * Copyright Advanced Micro Devices 2018
+ *
+ * Authors:
+ *      Brijesh Singh <brijesh.singh@amd.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 "qemu-common.h"
+#include "sysemu/sev.h"
+
+int sev_encrypt_data(void *handle, uint8_t *ptr, uint64_t len)
+{
+    abort();
+}
+
+void *sev_guest_init(const char *id)
+{
+    return NULL;
+}