Release 4.14 arch/s390/include/uapi/asm/guarded_storage.h

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

#define _GUARDED_STORAGE_H

#include <linux/types.h>


struct gs_cb {
	
__u64 reserved;
	
__u64 gsd;
	
__u64 gssm;
	
__u64 gs_epl_a;
};


struct gs_epl {
	
__u8 pad1;
	union {
		
__u8 gs_eam;
		struct {
			
__u8	: 6;
			
__u8 e	: 1;
			
__u8 b	: 1;
		};
	};
	union {
		
__u8 gs_eci;
		struct {
			
__u8 tx	: 1;
			
__u8 cx	: 1;
			
__u8	: 5;
			
__u8 in	: 1;
		};
	};
	union {
		
__u8 gs_eai;
		struct {
			
__u8	: 1;
			
__u8 t	: 1;
			
__u8 as	: 2;
			
__u8 ar	: 4;
		};
	};
	
__u32 pad2;
	
__u64 gs_eha;
	
__u64 gs_eia;
	
__u64 gs_eoa;
	
__u64 gs_eir;
	
__u64 gs_era;
};


#define GS_ENABLE	0

#define	GS_DISABLE	1

#define GS_SET_BC_CB	2

#define GS_CLEAR_BC_CB	3

#define GS_BROADCAST	4



static inline void load_gs_cb(struct gs_cb *gs_cb)
{
	asm volatile(".insn rxy,0xe3000000004d,0,%0" : : "Q" (*gs_cb));
}

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static inline void store_gs_cb(struct gs_cb *gs_cb)
{
	asm volatile(".insn rxy,0xe30000000049,0,%0" : : "Q" (*gs_cb));
}

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static inline void save_gs_cb(struct gs_cb *gs_cb)
{
	if (gs_cb)
		store_gs_cb(gs_cb);
}

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static inline void restore_gs_cb(struct gs_cb *gs_cb)
{
	if (gs_cb)
		load_gs_cb(gs_cb);
}

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#endif /* _GUARDED_STORAGE_H */
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Directory: arch/s390/include/uapi/asm

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