name : 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)); } 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 */