v4.19.13 snapshot.
diff --git a/include/linux/hypervisor.h b/include/linux/hypervisor.h
new file mode 100644
index 0000000..fc08b43
--- /dev/null
+++ b/include/linux/hypervisor.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_HYPEVISOR_H
+#define __LINUX_HYPEVISOR_H
+
+/*
+ * Generic Hypervisor support
+ * Juergen Gross <jgross@suse.com>
+ */
+
+#ifdef CONFIG_X86
+
+#include <asm/jailhouse_para.h>
+#include <asm/x86_init.h>
+
+static inline void hypervisor_pin_vcpu(int cpu)
+{
+ x86_platform.hyper.pin_vcpu(cpu);
+}
+
+#else /* !CONFIG_X86 */
+
+#include <linux/of.h>
+
+static inline void hypervisor_pin_vcpu(int cpu)
+{
+}
+
+static inline bool jailhouse_paravirt(void)
+{
+ return of_find_compatible_node(NULL, NULL, "jailhouse,cell");
+}
+
+#endif /* !CONFIG_X86 */
+
+#endif /* __LINUX_HYPEVISOR_H */