/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

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#ifndef _PR_H

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#define _PR_H

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#include <linux/types.h>

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enum pr_type {

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PR_WRITE_EXCLUSIVE = 1,

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PR_EXCLUSIVE_ACCESS = 2,

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PR_WRITE_EXCLUSIVE_REG_ONLY = 3,

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PR_EXCLUSIVE_ACCESS_REG_ONLY = 4,

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PR_WRITE_EXCLUSIVE_ALL_REGS = 5,

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PR_EXCLUSIVE_ACCESS_ALL_REGS = 6,

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};

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struct pr_reservation {

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__u64 key;

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__u32 type;

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__u32 flags;

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};

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struct pr_registration {

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__u64 old_key;

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__u64 new_key;

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__u32 flags;

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__u32 __pad;

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};

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struct pr_preempt {

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__u64 old_key;

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__u64 new_key;

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__u32 type;

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__u32 flags;

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};

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struct pr_clear {

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__u64 key;

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__u32 flags;

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__u32 __pad;

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};

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

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#define IOC_PR_REGISTER _IOW('p', 200, struct pr_registration)

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#define IOC_PR_RESERVE _IOW('p', 201, struct pr_reservation)

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#define IOC_PR_RELEASE _IOW('p', 202, struct pr_reservation)

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#define IOC_PR_PREEMPT _IOW('p', 203, struct pr_preempt)

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#define IOC_PR_PREEMPT_ABORT _IOW('p', 204, struct pr_preempt)

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#define IOC_PR_CLEAR _IOW('p', 205, struct pr_clear)

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#endif /* _PR_H */

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