diff --git a/xen/include/public/arch-x86/dom_numa.h b/xen/include/public/arch-x86/dom_numa.h
new file mode 100644
--- /dev/null
+++ b/xen/include/public/arch-x86/dom_numa.h
@@ -0,0 +1,73 @@
+/******************************************************************************
+ * dom_numa.h
+ *
+ * Guest NUMA common structures.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author : Dulloor Rao
+ */
+
+
+#ifndef __XEN_PUBLIC_DOM_NUMA_X86_H__
+#define __XEN_PUBLIC_DOM_NUMA_X86_H__
+
+/* struct xc_cpumask : static structure */
+#define XEN_CPUMASK_BITS_PER_BYTE 8
+#define XEN_CPUMASK_BITS_TO_BYTES(bits) \
+    (((bits)+XEN_CPUMASK_BITS_PER_BYTE-1)/XEN_CPUMASK_BITS_PER_BYTE)
+
+#define XEN_MAX_VCPUS 128
+#define XEN_CPUMASK_DECLARE_BITMAP(name,bits) \
+    uint8_t name[XEN_CPUMASK_BITS_TO_BYTES(bits)]
+struct xen_cpumask{ XEN_CPUMASK_DECLARE_BITMAP(bits, XEN_MAX_VCPUS); };
+#define XEN_CPUMASK_BITMAP(maskp) ((maskp)->bits)
+
+#define XEN_MAX_VNODES 4
+
+/* vnodes are 1GB-aligned */
+#define XEN_MIN_VNODE_SHIFT (30)
+
+struct xen_vnode_info {
+    uint8_t vnode_id;
+    uint8_t mnode_id;
+    uint32_t nr_pages;
+    struct xen_cpumask vcpu_mask; /* vnode_to_vcpumask */
+};
+
+#define XEN_DOM_NUMA_INTERFACE_VERSION  0x01
+
+#define XEN_DOM_NUMA_CONFINE    0x01
+#define XEN_DOM_NUMA_SPLIT      0x02
+#define XEN_DOM_NUMA_STRIPE     0x03
+#define XEN_DOM_NUMA_DONTCARE   0x04
+
+struct xen_domain_numa_info {
+    uint8_t version;
+    uint8_t type;
+
+    uint8_t nr_vcpus;
+    uint8_t nr_vnodes;
+
+    /* XXX: hvm_info_table uses 32-bit for high_mem_pgend, 
+     * so we should be fine 32-bits too*/
+    uint32_t nr_pages;
+    /* Only (nr_vnodes) entries are filled */
+    struct xen_vnode_info vnode_info[XEN_MAX_VNODES];
+    /* Only (nr_vnodes*nr_vnodes) entries are filled */
+    uint8_t vnode_distance[XEN_MAX_VNODES*XEN_MAX_VNODES];
+};
+
+#endif
diff --git a/xen/include/public/dom_numa.h b/xen/include/public/dom_numa.h
new file mode 100644
--- /dev/null
+++ b/xen/include/public/dom_numa.h
@@ -0,0 +1,33 @@
+/******************************************************************************
+ * dom_numa.h
+ *
+ * Guest NUMA common structures.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author : Dulloor Rao
+ */
+
+#ifndef __XEN_PUBLIC_DOM_NUMA_H
+#define __XEN_PUBLIC_DOM_NUMA_H
+
+#if defined(__i386__) || defined(__x86_64__)
+#include "./arch-x86/dom_numa.h"
+#else
+#error "unsupported architecture"
+#endif
+
+
+#endif