1 files changed, 63 insertions, 0 deletions

diff --git a/virt/kvm/iodev.h b/virt/kvm/iodev.h
new file mode 100644
index 000000000000..c14e642027b2
--- /dev/null
+++ b/virt/kvm/iodev.h
@@ -0,0 +1,63 @@
+/*
+ * 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.
+ *
+ * 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, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __KVM_IODEV_H__
+#define __KVM_IODEV_H__
+
+#include <linux/kvm_types.h>
+
+struct kvm_io_device {
+        void (*read)(struct kvm_io_device *this,
+                     gpa_t addr,
+                     int len,
+                     void *val);
+        void (*write)(struct kvm_io_device *this,
+                      gpa_t addr,
+                      int len,
+                      const void *val);
+        int (*in_range)(struct kvm_io_device *this, gpa_t addr);
+        void (*destructor)(struct kvm_io_device *this);
+
+        void             *private;
+};
+
+static inline void kvm_iodevice_read(struct kvm_io_device *dev,
+                                     gpa_t addr,
+                                     int len,
+                                     void *val)
+{
+        dev->read(dev, addr, len, val);
+}
+
+static inline void kvm_iodevice_write(struct kvm_io_device *dev,
+                                      gpa_t addr,
+                                      int len,
+                                      const void *val)
+{
+        dev->write(dev, addr, len, val);
+}
+
+static inline int kvm_iodevice_inrange(struct kvm_io_device *dev, gpa_t addr)
+{
+        return dev->in_range(dev, addr);
+}
+
+static inline void kvm_iodevice_destructor(struct kvm_io_device *dev)
+{
+        if (dev->destructor)
+                dev->destructor(dev);
+}
+
+#endif /* __KVM_IODEV_H__ */