142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/* 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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#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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#endif /* !CONFIG_INTEL_TXT */
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#endif /* _LINUX_TBOOT_H */
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