#ifndef __LINUX_KSM_H
#define __LINUX_KSM_H

/*
 * Userspace interface for /dev/ksm - kvm shared memory
 */

#include <asm/types.h>
#include <linux/ioctl.h>

#define KSM_API_VERSION 1

/* for KSM_REGISTER_MEMORY_REGION */
struct ksm_memory_region {
	__u32 npages; /* number of pages to share */
	__u64 addr; /* the begining of the virtual address */
};

#define KSMIO 0xAB

/* ioctls for /dev/ksm */
#define KSM_GET_API_VERSION              _IO(KSMIO,   0x00)
#define KSM_CREATE_SHARED_MEMORY_AREA    _IO(KSMIO,   0x01) /* return SMA fd */
#define KSM_CREATE_SCAN                  _IO(KSMIO,   0x02) /* return SCAN fd */

/* ioctls for SMA fds */
#define KSM_REGISTER_MEMORY_REGION       _IOW(KSMIO, 0x20,\
					      struct ksm_memory_region)
#define KSM_REMOVE_MEMORY_REGION         _IO(KSMIO,   0x21)

/* ioctls for SCAN fds */
#define KSM_SCAN                         _IO(KSMIO,   0x40)

#endif