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/* 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));
}
static inline void store_gs_cb(struct gs_cb *gs_cb)
{
asm volatile(".insn rxy,0xe30000000049,0,%0" : : "Q" (*gs_cb));
}
static inline void save_gs_cb(struct gs_cb *gs_cb)
{
if (gs_cb)
store_gs_cb(gs_cb);
}
static inline void restore_gs_cb(struct gs_cb *gs_cb)
{
if (gs_cb)
load_gs_cb(gs_cb);
}
#endif /* _GUARDED_STORAGE_H */