xen: Add support for HVM hypercalls.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
diff --git a/include/xen/hvm.h b/include/xen/hvm.h
new file mode 100644
index 0000000..5dfe8fb
--- /dev/null
+++ b/include/xen/hvm.h
@@ -0,0 +1,24 @@
+/* Simple wrappers around HVM functions */
+#ifndef XEN_HVM_H__
+#define XEN_HVM_H__
+
+#include <xen/interface/hvm/params.h>
+
+static inline int hvm_get_parameter(int idx, uint64_t *value)
+{
+ struct xen_hvm_param xhv;
+ int r;
+
+ xhv.domid = DOMID_SELF;
+ xhv.index = idx;
+ r = HYPERVISOR_hvm_op(HVMOP_get_param, &xhv);
+ if (r < 0) {
+ printk(KERN_ERR "Cannot get hvm parameter %d: %d!\n",
+ idx, r);
+ return r;
+ }
+ *value = xhv.value;
+ return r;
+}
+
+#endif /* XEN_HVM_H__ */
