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guarded_storage.h

guarded_storage.h 1.2 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
    2. 

  2. #ifndef _GUARDED_STORAGE_H
    3. 

  3. #define _GUARDED_STORAGE_H
    4. 

  4. 

  5. #include <linux/types.h>
    6. 

  6. 

  7. struct gs_cb {
    8. 

  8. 	__u64 reserved;
    9. 

  9. 	__u64 gsd;
    10. 

  10. 	__u64 gssm;
    11. 

  11. 	__u64 gs_epl_a;
    12. 

  12. };
    13. 

  13. 

  14. struct gs_epl {
    15. 

  15. 	__u8 pad1;
    16. 

  16. 	union {
    17. 

  17. 		__u8 gs_eam;
    18. 

  18. 		struct {
    19. 

  19. 			__u8	: 6;
    20. 

  20. 			__u8 e	: 1;
    21. 

  21. 			__u8 b	: 1;
    22. 

  22. 		};
    23. 

  23. 	};
    24. 

  24. 	union {
    25. 

  25. 		__u8 gs_eci;
    26. 

  26. 		struct {
    27. 

  27. 			__u8 tx	: 1;
    28. 

  28. 			__u8 cx	: 1;
    29. 

  29. 			__u8	: 5;
    30. 

  30. 			__u8 in	: 1;
    31. 

  31. 		};
    32. 

  32. 	};
    33. 

  33. 	union {
    34. 

  34. 		__u8 gs_eai;
    35. 

  35. 		struct {
    36. 

  36. 			__u8	: 1;
    37. 

  37. 			__u8 t	: 1;
    38. 

  38. 			__u8 as	: 2;
    39. 

  39. 			__u8 ar	: 4;
    40. 

  40. 		};
    41. 

  41. 	};
    42. 

  42. 	__u32 pad2;
    43. 

  43. 	__u64 gs_eha;
    44. 

  44. 	__u64 gs_eia;
    45. 

  45. 	__u64 gs_eoa;
    46. 

  46. 	__u64 gs_eir;
    47. 

  47. 	__u64 gs_era;
    48. 

  48. };
    49. 

  49. 

  50. #define GS_ENABLE	0
    51. 

  51. #define	GS_DISABLE	1
    52. 

  52. #define GS_SET_BC_CB	2
    53. 

  53. #define GS_CLEAR_BC_CB	3
    54. 

  54. #define GS_BROADCAST	4
    55. 

  55. 

  56. static inline void load_gs_cb(struct gs_cb *gs_cb)
    57. 

  57. {
    58. 

  58. 	asm volatile(".insn rxy,0xe3000000004d,0,%0" : : "Q" (*gs_cb));
    59. 

  59. }
    60. 

  60. 

  61. static inline void store_gs_cb(struct gs_cb *gs_cb)
    62. 

  62. {
    63. 

  63. 	asm volatile(".insn rxy,0xe30000000049,0,%0" : : "Q" (*gs_cb));
    64. 

  64. }
    65. 

  65. 

  66. static inline void save_gs_cb(struct gs_cb *gs_cb)
    67. 

  67. {
    68. 

  68. 	if (gs_cb)
    69. 

  69. 		store_gs_cb(gs_cb);
    70. 

  70. }
    71. 

  71. 

  72. static inline void restore_gs_cb(struct gs_cb *gs_cb)
    73. 

  73. {
    74. 

  74. 	if (gs_cb)
    75. 

  75. 		load_gs_cb(gs_cb);
    76. 

  76. }
    77. 

  77. 

  78. #endif /* _GUARDED_STORAGE_H */
    79. 

  79.