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78 lines
1.2 KiB
78 lines
1.2 KiB
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
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#ifndef _GUARDED_STORAGE_H |
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#define _GUARDED_STORAGE_H |
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#include <linux/types.h> |
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struct gs_cb { |
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__u64 reserved; |
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__u64 gsd; |
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__u64 gssm; |
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__u64 gs_epl_a; |
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}; |
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struct gs_epl { |
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__u8 pad1; |
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union { |
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__u8 gs_eam; |
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struct { |
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__u8 : 6; |
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__u8 e : 1; |
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__u8 b : 1; |
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}; |
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}; |
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union { |
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__u8 gs_eci; |
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struct { |
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__u8 tx : 1; |
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__u8 cx : 1; |
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__u8 : 5; |
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__u8 in : 1; |
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}; |
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}; |
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union { |
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__u8 gs_eai; |
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struct { |
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__u8 : 1; |
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__u8 t : 1; |
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__u8 as : 2; |
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__u8 ar : 4; |
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}; |
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}; |
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__u32 pad2; |
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__u64 gs_eha; |
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__u64 gs_eia; |
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__u64 gs_eoa; |
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__u64 gs_eir; |
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__u64 gs_era; |
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}; |
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#define GS_ENABLE 0 |
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#define GS_DISABLE 1 |
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#define GS_SET_BC_CB 2 |
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#define GS_CLEAR_BC_CB 3 |
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#define GS_BROADCAST 4 |
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static inline void load_gs_cb(struct gs_cb *gs_cb) |
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{ |
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asm volatile(".insn rxy,0xe3000000004d,0,%0" : : "Q" (*gs_cb)); |
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} |
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static inline void store_gs_cb(struct gs_cb *gs_cb) |
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{ |
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asm volatile(".insn rxy,0xe30000000049,0,%0" : : "Q" (*gs_cb)); |
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} |
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static inline void save_gs_cb(struct gs_cb *gs_cb) |
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{ |
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if (gs_cb) |
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store_gs_cb(gs_cb); |
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} |
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static inline void restore_gs_cb(struct gs_cb *gs_cb) |
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{ |
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if (gs_cb) |
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load_gs_cb(gs_cb); |
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} |
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#endif /* _GUARDED_STORAGE_H */
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