diff --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c
index ace2b16..d488426 100644
--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -421,6 +421,50 @@ bail:
 }
 EXPORT_SYMBOL(vga_put);
 
+#ifdef CONFIG_XEN
+#include <xen/xen.h>
+#include <xen/interface/physdev.h>
+#include <xen/interface/xen.h>
+#include <asm/xen/hypervisor.h>
+#include <asm/xen/hypercall.h>
+
+#define IO_BITMAP_BITS 65536
+#define IO_BITMAP_BYTES (IO_BITMAP_BITS/8)
+
+#define VGA_START_PORT 0x3B0
+#define VGA_END_PORT 0x3DF
+
+static void
+vga_ioport_map(struct pci_dev *pdev)
+{
+	unsigned int i, j;
+	struct physdev_set_iobitmap op;
+	uint8_t *bitmap;
+
+	bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
+	memset(bitmap, 0xff, IO_BITMAP_BYTES);
+
+	/* PCI io bars */
+	for (i = 0; i < PCI_NUM_RESOURCES; i++)
+		if (pci_resource_flags(pdev, i) & IORESOURCE_IO)
+			for (j = pci_resource_start(pdev, i);
+				j <= pci_resource_end(pdev, i); j++)
+				__clear_bit(j, (unsigned long*)bitmap);
+
+	/* legacy vga */
+	for (i = VGA_START_PORT; i <= VGA_END_PORT; i++)
+		__clear_bit(i, (unsigned long*)bitmap);
+
+	op.bitmap = bitmap;
+	op.nr_ports = IO_BITMAP_BITS;
+	if(HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap, &op) != 0)
+		pr_info("PHYSDEVOP_set_iobitmap failed\n");
+
+}
+#else
+#define vga_ioport_map(x)
+#endif
+
 /*
  * Currently, we assume that the "initial" setup of the system is
  * not sane, that is we come up with conflicting devices and let
@@ -509,6 +553,7 @@ static bool vga_arbiter_add_pci_device(struct pci_dev *pdev)
 		vga_iostate_to_str(vgadev->owns),
 		vga_iostate_to_str(vgadev->locks));
 
+	vga_ioport_map(pdev);
 	spin_unlock_irqrestore(&vga_lock, flags);
 	return true;
 fail: