| /* 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); |
| extern int tboot_force_iommu(void); |
| |
| #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) |
| #define tboot_force_iommu() 0 |
| |
| #endif /* !CONFIG_INTEL_TXT */ |
| |
| #endif /* _LINUX_TBOOT_H */ |