1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * tboot.h: shared data structure with tboot and kernel and functions 4 * used by kernel for runtime support of Intel(R) Trusted 5 * Execution Technology 6 * 7 * Copyright (c) 2006-2009, Intel Corporation 8 */ 9 10 #ifndef _LINUX_TBOOT_H 11 #define _LINUX_TBOOT_H 12 13 /* these must have the values from 0-5 in this order */ 14 enum { 15 TB_SHUTDOWN_REBOOT = 0, 16 TB_SHUTDOWN_S5, 17 TB_SHUTDOWN_S4, 18 TB_SHUTDOWN_S3, 19 TB_SHUTDOWN_HALT, 20 TB_SHUTDOWN_WFS 21 }; 22 23 #ifdef CONFIG_INTEL_TXT 24 #include <linux/acpi.h> 25 /* used to communicate between tboot and the launched kernel */ 26 27 #define TB_KEY_SIZE 64 /* 512 bits */ 28 29 #define MAX_TB_MAC_REGIONS 32 30 31 struct tboot_mac_region { 32 u64 start; /* must be 64 byte -aligned */ 33 u32 size; /* must be 64 byte -granular */ 34 } __packed; 35 36 /* GAS - Generic Address Structure (ACPI 2.0+) */ 37 struct tboot_acpi_generic_address { 38 u8 space_id; 39 u8 bit_width; 40 u8 bit_offset; 41 u8 access_width; 42 u64 address; 43 } __packed; 44 45 /* 46 * combines Sx info from FADT and FACS tables per ACPI 2.0+ spec 47 * (https://uefi.org/specifications) 48 */ 49 struct tboot_acpi_sleep_info { 50 struct tboot_acpi_generic_address pm1a_cnt_blk; 51 struct tboot_acpi_generic_address pm1b_cnt_blk; 52 struct tboot_acpi_generic_address pm1a_evt_blk; 53 struct tboot_acpi_generic_address pm1b_evt_blk; 54 u16 pm1a_cnt_val; 55 u16 pm1b_cnt_val; 56 u64 wakeup_vector; 57 u32 vector_width; 58 u64 kernel_s3_resume_vector; 59 } __packed; 60 61 /* 62 * shared memory page used for communication between tboot and kernel 63 */ 64 struct tboot { 65 /* 66 * version 3+ fields: 67 */ 68 69 /* TBOOT_UUID */ 70 u8 uuid[16]; 71 72 /* version number: 5 is current */ 73 u32 version; 74 75 /* physical addr of tb_log_t log */ 76 u32 log_addr; 77 78 /* 79 * physical addr of entry point for tboot shutdown and 80 * type of shutdown (TB_SHUTDOWN_*) being requested 81 */ 82 u32 shutdown_entry; 83 u32 shutdown_type; 84 85 /* kernel-specified ACPI info for Sx shutdown */ 86 struct tboot_acpi_sleep_info acpi_sinfo; 87 88 /* tboot location in memory (physical) */ 89 u32 tboot_base; 90 u32 tboot_size; 91 92 /* memory regions (phys addrs) for tboot to MAC on S3 */ 93 u8 num_mac_regions; 94 struct tboot_mac_region mac_regions[MAX_TB_MAC_REGIONS]; 95 96 97 /* 98 * version 4+ fields: 99 */ 100 101 /* symmetric key for use by kernel; will be encrypted on S3 */ 102 u8 s3_key[TB_KEY_SIZE]; 103 104 105 /* 106 * version 5+ fields: 107 */ 108 109 /* used to 4byte-align num_in_wfs */ 110 u8 reserved_align[3]; 111 112 /* number of processors in wait-for-SIPI */ 113 u32 num_in_wfs; 114 } __packed; 115 116 /* 117 * UUID for tboot data struct to facilitate matching 118 * defined as {663C8DFF-E8B3-4b82-AABF-19EA4D057A08} by tboot, which is 119 * represented as {} in the char array used here 120 */ 121 #define TBOOT_UUID {0xff, 0x8d, 0x3c, 0x66, 0xb3, 0xe8, 0x82, 0x4b, 0xbf,\ 122 0xaa, 0x19, 0xea, 0x4d, 0x5, 0x7a, 0x8} 123 124 bool tboot_enabled(void); 125 extern void tboot_probe(void); 126 extern void tboot_shutdown(u32 shutdown_type); 127 extern struct acpi_table_header *tboot_get_dmar_table( 128 struct acpi_table_header *dmar_tbl); 129 extern int tboot_force_iommu(void); 130 131 #else 132 133 #define tboot_enabled() 0 134 #define tboot_probe() do { } while (0) 135 #define tboot_shutdown(shutdown_type) do { } while (0) 136 #define tboot_sleep(sleep_state, pm1a_control, pm1b_control) \ 137 do { } while (0) 138 #define tboot_get_dmar_table(dmar_tbl) (dmar_tbl) 139 #define tboot_force_iommu() 0 140 141 #endif /* !CONFIG_INTEL_TXT */ 142 143 #endif /* _LINUX_TBOOT_H */ 144