1 /* 2 * tpm_tis.h - QEMU's TPM TIS common header 3 * 4 * Copyright (C) 2006,2010-2013 IBM Corporation 5 * 6 * Authors: 7 * Stefan Berger <stefanb@us.ibm.com> 8 * David Safford <safford@us.ibm.com> 9 * 10 * Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at> 11 * 12 * This work is licensed under the terms of the GNU GPL, version 2 or later. 13 * See the COPYING file in the top-level directory. 14 * 15 * Implementation of the TIS interface according to specs found at 16 * http://www.trustedcomputinggroup.org. This implementation currently 17 * supports version 1.3, 21 March 2013 18 * In the developers menu choose the PC Client section then find the TIS 19 * specification. 20 * 21 * TPM TIS for TPM 2 implementation following TCG PC Client Platform 22 * TPM Profile (PTP) Specification, Family 2.0, Revision 00.43 23 */ 24 #ifndef TPM_TPM_TIS_H 25 #define TPM_TPM_TIS_H 26 27 #include "system/tpm_backend.h" 28 #include "tpm_ppi.h" 29 30 #define TPM_TIS_NUM_LOCALITIES 5 /* per spec */ 31 #define TPM_TIS_LOCALITY_SHIFT 12 32 #define TPM_TIS_NO_LOCALITY 0xff 33 34 #define TPM_TIS_IS_VALID_LOCTY(x) ((x) < TPM_TIS_NUM_LOCALITIES) 35 36 #define TPM_TIS_BUFFER_MAX 4096 37 38 typedef enum { 39 TPM_TIS_STATE_IDLE = 0, 40 TPM_TIS_STATE_READY, 41 TPM_TIS_STATE_COMPLETION, 42 TPM_TIS_STATE_EXECUTION, 43 TPM_TIS_STATE_RECEPTION, 44 } TPMTISState; 45 46 /* locality data -- all fields are persisted */ 47 typedef struct TPMLocality { 48 TPMTISState state; 49 uint8_t access; 50 uint32_t sts; 51 uint32_t iface_id; 52 uint32_t inte; 53 uint32_t ints; 54 } TPMLocality; 55 56 typedef struct TPMState { 57 MemoryRegion mmio; 58 59 unsigned char buffer[TPM_TIS_BUFFER_MAX]; 60 uint16_t rw_offset; 61 62 uint8_t active_locty; 63 uint8_t aborting_locty; 64 uint8_t next_locty; 65 66 TPMLocality loc[TPM_TIS_NUM_LOCALITIES]; 67 68 qemu_irq irq; 69 uint32_t irq_num; 70 71 TPMBackendCmd cmd; 72 73 TPMBackend *be_driver; 74 TPMVersion be_tpm_version; 75 76 size_t be_buffer_size; 77 78 bool ppi_enabled; 79 TPMPPI ppi; 80 } TPMState; 81 82 extern const VMStateDescription vmstate_locty; 83 extern const MemoryRegionOps tpm_tis_memory_ops; 84 85 int tpm_tis_pre_save(TPMState *s); 86 void tpm_tis_reset(TPMState *s); 87 enum TPMVersion tpm_tis_get_tpm_version(TPMState *s); 88 void tpm_tis_request_completed(TPMState *s, int ret); 89 uint32_t tpm_tis_read_data(TPMState *s, hwaddr addr, unsigned size); 90 void tpm_tis_write_data(TPMState *s, hwaddr addr, uint64_t val, uint32_t size); 91 uint16_t tpm_tis_get_checksum(TPMState *s); 92 93 #endif /* TPM_TPM_TIS_H */ 94