[RFC v2 12/14] arm/sdei: add stub to fix build failure when SDEI is not enabled

[Heyi Guo <guoheyi@huawei.com>]

Signed-off-by: Heyi Guo <guoheyi@huawei.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
---
 target/arm/Makefile.objs |  2 ++
 target/arm/sdei-stub.c   | 49 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 target/arm/sdei-stub.c

diff --git a/target/arm/Makefile.objs b/target/arm/Makefile.objs
index 72e01d08dc..90235af8ec 100644
--- a/target/arm/Makefile.objs
+++ b/target/arm/Makefile.objs
@@ -12,6 +12,8 @@ obj-$(call land,$(CONFIG_KVM),$(TARGET_AARCH64)) += kvm64.o
 obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o
 
 obj-$(CONFIG_SDEI) += sdei.o
+obj-$(call lnot,$(CONFIG_SDEI)) += sdei-stub.o
+
 
 DECODETREE = $(SRC_PATH)/scripts/decodetree.py
 
diff --git a/target/arm/sdei-stub.c b/target/arm/sdei-stub.c
new file mode 100644
index 0000000000..4eaf365de7
--- /dev/null
+++ b/target/arm/sdei-stub.c
@@ -0,0 +1,49 @@
+/*
+ * QEMU ARM SDEI specific function stubs
+ *
+ * Copyright (c) Huawei Technologies Co., Ltd. 2019. All rights reserved.
+ *
+ * Author: Heyi Guo <guoheyi@huawei.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 "sdei.h"
+
+bool sdei_enabled;
+
+void sdei_handle_request(CPUState *cs, struct kvm_run *run)
+{
+    run->hypercall.args[0] = SDEI_NOT_SUPPORTED;
+    return;
+}
+
+/*
+ * Trigger an SDEI event bound to an interrupt.
+ * Return true if event has been triggered successfully.
+ * Return false if event has not been triggered for some reason.
+ */
+bool trigger_sdei_by_irq(int cpu, int irq)
+{
+    return false;
+}
+
+/*
+ * Register a notify callback for a specific interrupt bind operation; the
+ * client will be both notified by bind and unbind operation.
+ */
+void qemu_register_sdei_bind_notifier(QemuSDEIBindNotify *func,
+                                      void *opaque, int irq)
+{
+}
+
+/*
+ * Unregister a notify callback for a specific interrupt bind operation.
+ */
+void qemu_unregister_sdei_bind_notifier(QemuSDEIBindNotify *func,
+                                        void *opaque, int irq)
+{
+}
-- 
2.19.1