| /* 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 */ |