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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _PR_H
#define _PR_H

#include <linux/types.h>

enum pr_type {
	PR_WRITE_EXCLUSIVE		= 1,
	PR_EXCLUSIVE_ACCESS		= 2,
	PR_WRITE_EXCLUSIVE_REG_ONLY	= 3,
	PR_EXCLUSIVE_ACCESS_REG_ONLY	= 4,
	PR_WRITE_EXCLUSIVE_ALL_REGS	= 5,
	PR_EXCLUSIVE_ACCESS_ALL_REGS	= 6,
};

struct pr_reservation {
	__u64	key;
	__u32	type;
	__u32	flags;
};

struct pr_registration {
	__u64	old_key;
	__u64	new_key;
	__u32	flags;
	__u32	__pad;
};

struct pr_preempt {
	__u64	old_key;
	__u64	new_key;
	__u32	type;
	__u32	flags;
};

struct pr_clear {
	__u64	key;
	__u32	flags;
	__u32	__pad;
};

#define PR_FL_IGNORE_KEY	(1 << 0)	/* ignore existing key */

#define IOC_PR_REGISTER		_IOW('p', 200, struct pr_registration)
#define IOC_PR_RESERVE		_IOW('p', 201, struct pr_reservation)
#define IOC_PR_RELEASE		_IOW('p', 202, struct pr_reservation)
#define IOC_PR_PREEMPT		_IOW('p', 203, struct pr_preempt)
#define IOC_PR_PREEMPT_ABORT	_IOW('p', 204, struct pr_preempt)
#define IOC_PR_CLEAR		_IOW('p', 205, struct pr_clear)

#endif /* _PR_H */

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