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tpm_tis.h (2290B)

      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, Familiy 2.0, Revision 00.43
     23  */
     24 #ifndef TPM_TPM_TIS_H
     25 #define TPM_TPM_TIS_H
     26 
     27 #include "sysemu/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 
     90 #endif /* TPM_TPM_TIS_H */