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-rw-r--r--include/xen/arm/swiotlb-xen.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/include/xen/arm/swiotlb-xen.h b/include/xen/arm/swiotlb-xen.h
new file mode 100644
index 000000000..33336ab58
--- /dev/null
+++ b/include/xen/arm/swiotlb-xen.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_ARM_SWIOTLB_XEN_H
+#define _ASM_ARM_SWIOTLB_XEN_H
+
+#include <xen/features.h>
+#include <xen/xen.h>
+
+static inline int xen_swiotlb_detect(void)
+{
+ if (!xen_domain())
+ return 0;
+ if (xen_feature(XENFEAT_direct_mapped))
+ return 1;
+ /* legacy case */
+ if (!xen_feature(XENFEAT_not_direct_mapped) && xen_initial_domain())
+ return 1;
+ return 0;
+}
+
+#endif /* _ASM_ARM_SWIOTLB_XEN_H */