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