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/*
* heap.h: Intel(r) TXT heap definitions
*
* Copyright (c) 2003-2011, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __TXT_HEAP_H__
#define __TXT_HEAP_H__
/*
* Extensible TXT heap data structure
*/
typedef struct __packed {
uint32_t type;
uint32_t size;
uint8_t data[];
} heap_ext_data_element_t;
/*
* HEAP_END_ELEMENT
*/
#define HEAP_EXTDATA_TYPE_END 0
/* size == 8; there is no data[] */
/*
* HEAP_BIOS_SPEC_VER_ELEMENT
*/
#define HEAP_EXTDATA_TYPE_BIOS_SPEC_VER 1
typedef struct __packed {
uint16_t spec_ver_major;
uint16_t spec_ver_minor;
uint16_t spec_ver_rev;
} heap_bios_spec_ver_elt_t;
/*
* HEAP_ACM_ELEMENT
*/
#define HEAP_EXTDATA_TYPE_ACM 2
typedef struct __packed {
uint32_t num_acms;
uint64_t acm_addrs[];
} heap_acm_elt_t;
/*
* HEAP_CUSTOM_ELEMENT
*/
#define HEAP_EXTDATA_TYPE_CUSTOM 4
typedef struct __packed {
uuid_t uuid;
uint8_t data[];
} heap_custom_elt_t;
/*
* HEAP_EVENT_LOG_POINTER_ELEMENT
*/
#define HEAP_EXTDATA_TYPE_TPM_EVENT_LOG_PTR 5
typedef struct __packed {
uint64_t event_log_phys_addr;
} heap_event_log_ptr_elt_t;
typedef struct __packed {
uint32_t pcr_index;
uint32_t type;
sha1_hash_t digest;
uint32_t data_size;
uint8_t data[];
} tpm12_pcr_event_t;
#define EVTLOG_SIGNATURE "TXT Event Container\0"
#define EVTLOG_CNTNR_MAJOR_VER 1
#define EVTLOG_CNTNR_MINOR_VER 0
#define EVTLOG_EVT_MAJOR_VER 1
#define EVTLOG_EVT_MINOR_VER 0
typedef struct __packed {
uint8_t signature[20];
uint8_t reserved[12];
uint8_t container_ver_major;
uint8_t container_ver_minor;
uint8_t pcr_event_ver_major;
uint8_t pcr_event_ver_minor;
uint32_t size;
uint32_t pcr_events_offset;
uint32_t next_event_offset;
tpm12_pcr_event_t pcr_events[];
} event_log_container_t;
/*
* HEAP_EVENT_LOG_POINTER_ELEMENT2
*/
#define HEAP_EXTDATA_TYPE_TPM_EVENT_LOG_PTR_2 7
#define DIGEST_ALG_ID_SHA_1 0x00000001
#define DIGEST_ALG_ID_SHA_256 0x00000002
#define DIGEST_ALG_ID_SHA_384 0x00000003
#define DIGEST_ALG_ID_SHA_512 0x00000004
#define DIGEST_ALG_ID_SM3 0x00000005
static inline unsigned int get_evtlog_digest_id(uint16_t hash_alg)
{
if ( hash_alg == TB_HALG_SHA1 )
return DIGEST_ALG_ID_SHA_1;
else if ( hash_alg == TB_HALG_SHA256 )
return DIGEST_ALG_ID_SHA_256;
else if ( hash_alg == TB_HALG_SM3 )
return DIGEST_ALG_ID_SM3;
else if ( hash_alg == TB_HALG_SHA384 )
return DIGEST_ALG_ID_SHA_384;
else if ( hash_alg == TB_HALG_SHA512 )
return DIGEST_ALG_ID_SHA_512;
else
return 0;
}
typedef struct __packed {
uint8_t signature[16];
uint32_t revision;
uint32_t digest_id;
uint32_t digest_size;
} tpm20_log_descr_t;
typedef struct __packed {
uint16_t alg;
uint16_t reserved;
uint64_t phys_addr;
uint32_t size;
uint32_t pcr_events_offset;
uint32_t next_event_offset;
} heap_event_log_descr_t;
typedef struct __packed {
uint32_t count;
heap_event_log_descr_t event_log_descr[];
} heap_event_log_ptr_elt2_t;
/*
* data-passing structures contained in TXT heap:
* - BIOS
* - OS/loader to MLE
* - OS/loader to SINIT
* - SINIT to MLE
*/
/*
* BIOS structure
*/
typedef struct __packed {
uint32_t version; /* currently 2-4 */
uint32_t bios_sinit_size;
uint64_t lcp_pd_base;
uint64_t lcp_pd_size;
uint32_t num_logical_procs;
/* versions >= 3 */
uint64_t flags; /* For TPM2, it is divided into sinit_flag and mle_flag */
/* versions >= 4 */
heap_ext_data_element_t ext_data_elts[];
} bios_data_t;
/*
* OS/loader to MLE structure
* - private to tboot (so can be any format we need)
*/
#define MAX_LCP_PO_DATA_SIZE 64*1024 /* 64k */
#define MAX_EVENT_LOG_SIZE 5*4*1024 /* 4k*5 */
typedef struct __packed {
uint32_t version; /* currently 3 */
mtrr_state_t saved_mtrr_state; /* saved prior to changes for SINIT */
uint64_t saved_misc_enable_msr; /* saved prior to SENTER */
/* PO policy data */
uint8_t lcp_po_data[MAX_LCP_PO_DATA_SIZE];
/* buffer for tpm event log */
uint8_t event_log_buffer[MAX_EVENT_LOG_SIZE];
} os_mle_data_t;
#define MIN_OS_SINIT_DATA_VER 4
#define MAX_OS_SINIT_DATA_VER 7
#define OS_SINIT_FLAGS_EXTPOL_MASK 0x00000001
/*
* OS/loader to SINIT structure
*/
typedef struct __packed {
uint32_t version; /* currently 4-7 */
uint32_t flags; /* For TPM2: BIT0:= PCR Extend Policy Control */
uint64_t mle_ptab;
uint64_t mle_size;
uint64_t mle_hdr_base;
uint64_t vtd_pmr_lo_base;
uint64_t vtd_pmr_lo_size;
uint64_t vtd_pmr_hi_base;
uint64_t vtd_pmr_hi_size;
uint64_t lcp_po_base;
uint64_t lcp_po_size;
txt_caps_t capabilities;
/* versions >= 5 */
uint64_t efi_rsdt_ptr;
/* versions >= 6 */
heap_ext_data_element_t ext_data_elts[];
} os_sinit_data_t;
/*
* SINIT to MLE structure
*/
#define MDR_MEMTYPE_GOOD 0x00
#define MDR_MEMTYPE_SMM_OVERLAY 0x01
#define MDR_MEMTYPE_SMM_NONOVERLAY 0x02
#define MDR_MEMTYPE_PCIE_CONFIG_SPACE 0x03
#define MDR_MEMTYPE_PROTECTED 0x04
typedef struct __packed {
uint64_t base;
uint64_t length;
uint8_t mem_type;
uint8_t reserved[7];
} sinit_mdr_t;
typedef struct __packed {
uint32_t version; /* currently 6-9 */
sha1_hash_t bios_acm_id; /* only for tpm1.2 */
uint32_t edx_senter_flags; /* only for tpm1.2 */
uint64_t mseg_valid; /* only for tpm1.2 */
sha1_hash_t sinit_hash; /* only for tpm1.2 */
sha1_hash_t mle_hash; /* only for tpm1.2 */
sha1_hash_t stm_hash; /* only for tpm1.2 */
sha1_hash_t lcp_policy_hash; /* only for tpm1.2 */
uint32_t lcp_policy_control; /* only for tpm1.2 */
uint32_t rlp_wakeup_addr;
uint32_t reserved;
uint32_t num_mdrs;
uint32_t mdrs_off;
uint32_t num_vtd_dmars;
uint32_t vtd_dmars_off;
/* versions >= 8 */
uint32_t proc_scrtm_status; /* only for tpm1.2 */
/* versions >= 9 */
heap_ext_data_element_t ext_data_elts[];
} sinit_mle_data_t;
/*
* TXT heap data format and field accessor fns
*/
/*
* offset length field
* ------ ------ -----
* 0 8 bios_data_size
* 8 bios_data_size - 8 bios_data
*
* bios_data_size 8 os_mle_data_size
* bios_data_size + os_mle_data_size - 8 os_mle_data
* 8
*
* bios_data_size + 8 os_sinit_data_size
* os_mle_data_size
* bios_data_size + os_sinit_data_size - 8 os_sinit_data
* os_mle_data_size +
* 8
*
* bios_data_size + 8 sinit_mle_data_size
* os_mle_data_size +
* os_sinit_data_size
* bios_data_size + sinit_mle_data_size - 8 sinit_mle_data
* os_mle_data_size +
* os_sinit_data_size +
* 8
*/
typedef void txt_heap_t;
/* TODO these are causing warnings - changed to ull */
/* this is a common use with annoying casting, so make it an inline */
static inline txt_heap_t *get_txt_heap(void)
{
return (txt_heap_t *)(unsigned long long)read_pub_config_reg(TXTCR_HEAP_BASE);
}
static inline uint64_t get_bios_data_size(const txt_heap_t *heap)
{
return *(uint64_t *)heap;
}
static inline bios_data_t *get_bios_data_start(const txt_heap_t *heap)
{
return (bios_data_t *)((char*)heap + sizeof(uint64_t));
}
static inline uint64_t get_os_mle_data_size(const txt_heap_t *heap)
{
return *(uint64_t *)(heap + get_bios_data_size(heap));
}
static inline os_mle_data_t *get_os_mle_data_start(const txt_heap_t *heap)
{
return (os_mle_data_t *)(heap + get_bios_data_size(heap) +
sizeof(uint64_t));
}
static inline uint64_t get_os_sinit_data_size(const txt_heap_t *heap)
{
return *(uint64_t *)(heap + get_bios_data_size(heap) +
get_os_mle_data_size(heap));
}
static inline os_sinit_data_t *get_os_sinit_data_start(const txt_heap_t *heap)
{
return (os_sinit_data_t *)(heap + get_bios_data_size(heap) +
get_os_mle_data_size(heap) +
sizeof(uint64_t));
}
static inline uint64_t get_sinit_mle_data_size(const txt_heap_t *heap)
{
return *(uint64_t *)(heap + get_bios_data_size(heap) +
get_os_mle_data_size(heap) +
get_os_sinit_data_size(heap));
}
static inline sinit_mle_data_t *get_sinit_mle_data_start(const txt_heap_t *heap)
{
return (sinit_mle_data_t *)(heap + get_bios_data_size(heap) +
get_os_mle_data_size(heap) +
get_os_sinit_data_size(heap) +
sizeof(uint64_t));
}
uint64_t calc_os_sinit_data_size(uint32_t version);
bool verify_txt_heap(const txt_heap_t *txt_heap, bool bios_data_only);
bool verify_bios_data(const txt_heap_t *txt_heap);
void print_os_sinit_data(const os_sinit_data_t *os_sinit_data);
#endif /* __TXT_HEAP_H__ */
/*
* Local variables:
* mode: C
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
|