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/* 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 */
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