| /* 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 */ |
