1 files changed, 57 insertions, 0 deletions
diff --git a/kvm_iodev.h b/kvm_iodev.h
new file mode 100644
index 0000000..522d8c6
--- /dev/null
+++ b/kvm_iodev.h
@@ -0,0 +1,57 @@
+/*
+ * 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 "kvm_types.h"
+
+struct kvm_io_device;
+
+/**
+ * kvm_io_device_ops are called under kvm slots_lock.
+ * read and write handlers return 0 if the transaction has been handled,
+ * or non-zero to have it passed to the next device.
+ **/
+typedef struct kvm_io_device_ops {
+	int (*read)(struct kvm_io_device *this,
+		    gpa_t addr,
+		    int len,
+		    void *val);
+	int (*write)(struct kvm_io_device *this,
+		     gpa_t addr,
+		     int len,
+		     const void *val);
+	void (*destructor)(struct kvm_io_device *this);
+} kvm_io_device_ops_t;
+
+
+typedef struct kvm_io_device {
+	struct kvm_lapic *lapic;
+	const struct kvm_io_device_ops *ops;
+} kvm_io_device_t;
+
+void kvm_iodevice_init(struct kvm_io_device *,
+    const struct kvm_io_device_ops *);
+
+int kvm_iodevice_read(struct kvm_io_device *,
+    gpa_t, int, void *);
+
+int kvm_iodevice_write(struct kvm_io_device *dev,
+     gpa_t addr, int l, const void *v);
+
+void kvm_iodevice_destructor(struct kvm_io_device *dev);
+
+#endif /* __KVM_IODEV_H__ */