79 lines
1.2 KiB
C
79 lines
1.2 KiB
C
/* 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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