diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/tboot.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/include/linux/tboot.h b/include/linux/tboot.h new file mode 100644 index 000000000000..bf2a0c748878 --- /dev/null +++ b/include/linux/tboot.h | |||
@@ -0,0 +1,162 @@ | |||
1 | /* | ||
2 | * tboot.h: shared data structure with tboot and kernel and functions | ||
3 | * used by kernel for runtime support of Intel(R) Trusted | ||
4 | * Execution Technology | ||
5 | * | ||
6 | * Copyright (c) 2006-2009, Intel Corporation | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify it | ||
9 | * under the terms and conditions of the GNU General Public License, | ||
10 | * version 2, as published by the Free Software Foundation. | ||
11 | * | ||
12 | * This program is distributed in the hope it will be useful, but WITHOUT | ||
13 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
14 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | ||
15 | * more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License along with | ||
18 | * this program; if not, write to the Free Software Foundation, Inc., | ||
19 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | ||
20 | * | ||
21 | */ | ||
22 | |||
23 | #ifndef _LINUX_TBOOT_H | ||
24 | #define _LINUX_TBOOT_H | ||
25 | |||
26 | /* these must have the values from 0-5 in this order */ | ||
27 | enum { | ||
28 | TB_SHUTDOWN_REBOOT = 0, | ||
29 | TB_SHUTDOWN_S5, | ||
30 | TB_SHUTDOWN_S4, | ||
31 | TB_SHUTDOWN_S3, | ||
32 | TB_SHUTDOWN_HALT, | ||
33 | TB_SHUTDOWN_WFS | ||
34 | }; | ||
35 | |||
36 | #ifdef CONFIG_INTEL_TXT | ||
37 | #include <acpi/acpi.h> | ||
38 | /* used to communicate between tboot and the launched kernel */ | ||
39 | |||
40 | #define TB_KEY_SIZE 64 /* 512 bits */ | ||
41 | |||
42 | #define MAX_TB_MAC_REGIONS 32 | ||
43 | |||
44 | struct tboot_mac_region { | ||
45 | u64 start; /* must be 64 byte -aligned */ | ||
46 | u32 size; /* must be 64 byte -granular */ | ||
47 | } __packed; | ||
48 | |||
49 | /* GAS - Generic Address Structure (ACPI 2.0+) */ | ||
50 | struct tboot_acpi_generic_address { | ||
51 | u8 space_id; | ||
52 | u8 bit_width; | ||
53 | u8 bit_offset; | ||
54 | u8 access_width; | ||
55 | u64 address; | ||
56 | } __packed; | ||
57 | |||
58 | /* | ||
59 | * combines Sx info from FADT and FACS tables per ACPI 2.0+ spec | ||
60 | * (http://www.acpi.info/) | ||
61 | */ | ||
62 | struct tboot_acpi_sleep_info { | ||
63 | struct tboot_acpi_generic_address pm1a_cnt_blk; | ||
64 | struct tboot_acpi_generic_address pm1b_cnt_blk; | ||
65 | struct tboot_acpi_generic_address pm1a_evt_blk; | ||
66 | struct tboot_acpi_generic_address pm1b_evt_blk; | ||
67 | u16 pm1a_cnt_val; | ||
68 | u16 pm1b_cnt_val; | ||
69 | u64 wakeup_vector; | ||
70 | u32 vector_width; | ||
71 | u64 kernel_s3_resume_vector; | ||
72 | } __packed; | ||
73 | |||
74 | /* | ||
75 | * shared memory page used for communication between tboot and kernel | ||
76 | */ | ||
77 | struct tboot { | ||
78 | /* | ||
79 | * version 3+ fields: | ||
80 | */ | ||
81 | |||
82 | /* TBOOT_UUID */ | ||
83 | u8 uuid[16]; | ||
84 | |||
85 | /* version number: 5 is current */ | ||
86 | u32 version; | ||
87 | |||
88 | /* physical addr of tb_log_t log */ | ||
89 | u32 log_addr; | ||
90 | |||
91 | /* | ||
92 | * physical addr of entry point for tboot shutdown and | ||
93 | * type of shutdown (TB_SHUTDOWN_*) being requested | ||
94 | */ | ||
95 | u32 shutdown_entry; | ||
96 | u32 shutdown_type; | ||
97 | |||
98 | /* kernel-specified ACPI info for Sx shutdown */ | ||
99 | struct tboot_acpi_sleep_info acpi_sinfo; | ||
100 | |||
101 | /* tboot location in memory (physical) */ | ||
102 | u32 tboot_base; | ||
103 | u32 tboot_size; | ||
104 | |||
105 | /* memory regions (phys addrs) for tboot to MAC on S3 */ | ||
106 | u8 num_mac_regions; | ||
107 | struct tboot_mac_region mac_regions[MAX_TB_MAC_REGIONS]; | ||
108 | |||
109 | |||
110 | /* | ||
111 | * version 4+ fields: | ||
112 | */ | ||
113 | |||
114 | /* symmetric key for use by kernel; will be encrypted on S3 */ | ||
115 | u8 s3_key[TB_KEY_SIZE]; | ||
116 | |||
117 | |||
118 | /* | ||
119 | * version 5+ fields: | ||
120 | */ | ||
121 | |||
122 | /* used to 4byte-align num_in_wfs */ | ||
123 | u8 reserved_align[3]; | ||
124 | |||
125 | /* number of processors in wait-for-SIPI */ | ||
126 | u32 num_in_wfs; | ||
127 | } __packed; | ||
128 | |||
129 | /* | ||
130 | * UUID for tboot data struct to facilitate matching | ||
131 | * defined as {663C8DFF-E8B3-4b82-AABF-19EA4D057A08} by tboot, which is | ||
132 | * represented as {} in the char array used here | ||
133 | */ | ||
134 | #define TBOOT_UUID {0xff, 0x8d, 0x3c, 0x66, 0xb3, 0xe8, 0x82, 0x4b, 0xbf,\ | ||
135 | 0xaa, 0x19, 0xea, 0x4d, 0x5, 0x7a, 0x8} | ||
136 | |||
137 | extern struct tboot *tboot; | ||
138 | |||
139 | static inline int tboot_enabled(void) | ||
140 | { | ||
141 | return tboot != NULL; | ||
142 | } | ||
143 | |||
144 | extern void tboot_probe(void); | ||
145 | extern void tboot_shutdown(u32 shutdown_type); | ||
146 | extern void tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control); | ||
147 | extern struct acpi_table_header *tboot_get_dmar_table( | ||
148 | struct acpi_table_header *dmar_tbl); | ||
149 | extern int tboot_force_iommu(void); | ||
150 | |||
151 | #else | ||
152 | |||
153 | #define tboot_probe() do { } while (0) | ||
154 | #define tboot_shutdown(shutdown_type) do { } while (0) | ||
155 | #define tboot_sleep(sleep_state, pm1a_control, pm1b_control) \ | ||
156 | do { } while (0) | ||
157 | #define tboot_get_dmar_table(dmar_tbl) (dmar_tbl) | ||
158 | #define tboot_force_iommu() 0 | ||
159 | |||
160 | #endif /* !CONFIG_INTEL_TXT */ | ||
161 | |||
162 | #endif /* _LINUX_TBOOT_H */ | ||