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usr
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src
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linux-headers-6.8.0-36-generic
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include
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linux
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drwxr-xr-x
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tboot.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * tboot.h: shared data structure with tboot and kernel and functions * used by kernel for runtime support of Intel(R) Trusted * Execution Technology * * Copyright (c) 2006-2009, Intel Corporation */ #ifndef _LINUX_TBOOT_H #define _LINUX_TBOOT_H /* these must have the values from 0-5 in this order */ enum { TB_SHUTDOWN_REBOOT = 0, TB_SHUTDOWN_S5, TB_SHUTDOWN_S4, TB_SHUTDOWN_S3, TB_SHUTDOWN_HALT, TB_SHUTDOWN_WFS }; #ifdef CONFIG_INTEL_TXT #include <linux/acpi.h> /* used to communicate between tboot and the launched kernel */ #define TB_KEY_SIZE 64 /* 512 bits */ #define MAX_TB_MAC_REGIONS 32 struct tboot_mac_region { u64 start; /* must be 64 byte -aligned */ u32 size; /* must be 64 byte -granular */ } __packed; /* GAS - Generic Address Structure (ACPI 2.0+) */ struct tboot_acpi_generic_address { u8 space_id; u8 bit_width; u8 bit_offset; u8 access_width; u64 address; } __packed; /* * combines Sx info from FADT and FACS tables per ACPI 2.0+ spec * (https://uefi.org/specifications) */ struct tboot_acpi_sleep_info { struct tboot_acpi_generic_address pm1a_cnt_blk; struct tboot_acpi_generic_address pm1b_cnt_blk; struct tboot_acpi_generic_address pm1a_evt_blk; struct tboot_acpi_generic_address pm1b_evt_blk; u16 pm1a_cnt_val; u16 pm1b_cnt_val; u64 wakeup_vector; u32 vector_width; u64 kernel_s3_resume_vector; } __packed; /* * shared memory page used for communication between tboot and kernel */ struct tboot { /* * version 3+ fields: */ /* TBOOT_UUID */ u8 uuid[16]; /* version number: 5 is current */ u32 version; /* physical addr of tb_log_t log */ u32 log_addr; /* * physical addr of entry point for tboot shutdown and * type of shutdown (TB_SHUTDOWN_*) being requested */ u32 shutdown_entry; u32 shutdown_type; /* kernel-specified ACPI info for Sx shutdown */ struct tboot_acpi_sleep_info acpi_sinfo; /* tboot location in memory (physical) */ u32 tboot_base; u32 tboot_size; /* memory regions (phys addrs) for tboot to MAC on S3 */ u8 num_mac_regions; struct tboot_mac_region mac_regions[MAX_TB_MAC_REGIONS]; /* * version 4+ fields: */ /* symmetric key for use by kernel; will be encrypted on S3 */ u8 s3_key[TB_KEY_SIZE]; /* * version 5+ fields: */ /* used to 4byte-align num_in_wfs */ u8 reserved_align[3]; /* number of processors in wait-for-SIPI */ u32 num_in_wfs; } __packed; /* * UUID for tboot data struct to facilitate matching * defined as {663C8DFF-E8B3-4b82-AABF-19EA4D057A08} by tboot, which is * represented as {} in the char array used here */ #define TBOOT_UUID {0xff, 0x8d, 0x3c, 0x66, 0xb3, 0xe8, 0x82, 0x4b, 0xbf,\ 0xaa, 0x19, 0xea, 0x4d, 0x5, 0x7a, 0x8} bool tboot_enabled(void); extern void tboot_probe(void); extern void tboot_shutdown(u32 shutdown_type); extern struct acpi_table_header *tboot_get_dmar_table( struct acpi_table_header *dmar_tbl); #else #define tboot_enabled() 0 #define tboot_probe() do { } while (0) #define tboot_shutdown(shutdown_type) do { } while (0) #define tboot_sleep(sleep_state, pm1a_control, pm1b_control) \ do { } while (0) #define tboot_get_dmar_table(dmar_tbl) (dmar_tbl) #endif /* !CONFIG_INTEL_TXT */ #endif /* _LINUX_TBOOT_H */
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