xen: move Xen-testing predicates to common header

Move xen_domain and related tests out of asm-x86 to xen/xen.h so they
can be included whenever they are necessary.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 32 insertions, 0 deletions

diff --git a/include/xen/xen.h b/include/xen/xen.h
new file mode 100644
index 000000000000..a16402418d31
--- /dev/null
+++ b/include/xen/xen.h
@@ -0,0 +1,32 @@
+#ifndef _XEN_XEN_H
+#define _XEN_XEN_H
+
+enum xen_domain_type {
+        XEN_NATIVE,             /* running on bare hardware    */
+        XEN_PV_DOMAIN,          /* running in a PV domain      */
+        XEN_HVM_DOMAIN,         /* running in a Xen hvm domain */
+};
+
+#ifdef CONFIG_XEN
+extern enum xen_domain_type xen_domain_type;
+#else
+#define xen_domain_type         XEN_NATIVE
+#endif
+
+#define xen_domain()            (xen_domain_type != XEN_NATIVE)
+#define xen_pv_domain()         (xen_domain() &&                        \
+                                 xen_domain_type == XEN_PV_DOMAIN)
+#define xen_hvm_domain()        (xen_domain() &&                        \
+                                 xen_domain_type == XEN_HVM_DOMAIN)
+
+#ifdef CONFIG_XEN_DOM0
+#include <xen/interface/xen.h>
+#include <asm/xen/hypervisor.h>
+
+#define xen_initial_domain()    (xen_pv_domain() && \
+                                 xen_start_info->flags & SIF_INITDOMAIN)
+#else  /* !CONFIG_XEN_DOM0 */
+#define xen_initial_domain()    (0)
+#endif  /* CONFIG_XEN_DOM0 */
+
+#endif  /* _XEN_XEN_H */