bbadfb2e0a
Qemu already supports devices attached to ISA and sysbus. This drop adds support for the I2C bus attached TPM devices. This commit includes changes for the common code. - Added support for the new checksum registers which are required for the I2C support. The checksum calculation is handled in the qemu common code. - Added wrapper function for read and write data so that I2C code can call it without MMIO interface. The TPM TIS I2C spec describes in the table in section "Interface Locality Usage per Register" that the TPM_INT_ENABLE and TPM_INT_STATUS registers must be writable for any locality even if the locality is not the active locality. Therefore, remove the checks whether the writing locality is the active locality for these registers. Signed-off-by: Ninad Palsule <ninad@linux.ibm.com> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com> Tested-by: Stefan Berger <stefanb@linux.ibm.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Tested-by: Joel Stanley <joel@jms.id.au> Message-id: 20230414220754.1191476-3-ninadpalsule@us.ibm.com
94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
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* tpm_tis.h - QEMU's TPM TIS common header
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*
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* Copyright (C) 2006,2010-2013 IBM Corporation
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*
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* Authors:
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* Stefan Berger <stefanb@us.ibm.com>
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* David Safford <safford@us.ibm.com>
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*
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* Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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* Implementation of the TIS interface according to specs found at
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* http://www.trustedcomputinggroup.org. This implementation currently
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* supports version 1.3, 21 March 2013
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* In the developers menu choose the PC Client section then find the TIS
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* specification.
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*
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* TPM TIS for TPM 2 implementation following TCG PC Client Platform
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* TPM Profile (PTP) Specification, Familiy 2.0, Revision 00.43
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*/
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#ifndef TPM_TPM_TIS_H
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#define TPM_TPM_TIS_H
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#include "sysemu/tpm_backend.h"
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#include "tpm_ppi.h"
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#define TPM_TIS_NUM_LOCALITIES 5 /* per spec */
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#define TPM_TIS_LOCALITY_SHIFT 12
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#define TPM_TIS_NO_LOCALITY 0xff
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#define TPM_TIS_IS_VALID_LOCTY(x) ((x) < TPM_TIS_NUM_LOCALITIES)
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#define TPM_TIS_BUFFER_MAX 4096
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typedef enum {
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TPM_TIS_STATE_IDLE = 0,
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TPM_TIS_STATE_READY,
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TPM_TIS_STATE_COMPLETION,
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TPM_TIS_STATE_EXECUTION,
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TPM_TIS_STATE_RECEPTION,
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} TPMTISState;
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/* locality data -- all fields are persisted */
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typedef struct TPMLocality {
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TPMTISState state;
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uint8_t access;
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uint32_t sts;
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uint32_t iface_id;
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uint32_t inte;
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uint32_t ints;
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} TPMLocality;
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typedef struct TPMState {
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MemoryRegion mmio;
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unsigned char buffer[TPM_TIS_BUFFER_MAX];
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uint16_t rw_offset;
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uint8_t active_locty;
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uint8_t aborting_locty;
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uint8_t next_locty;
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TPMLocality loc[TPM_TIS_NUM_LOCALITIES];
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qemu_irq irq;
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uint32_t irq_num;
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TPMBackendCmd cmd;
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TPMBackend *be_driver;
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TPMVersion be_tpm_version;
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size_t be_buffer_size;
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bool ppi_enabled;
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TPMPPI ppi;
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} TPMState;
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extern const VMStateDescription vmstate_locty;
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extern const MemoryRegionOps tpm_tis_memory_ops;
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int tpm_tis_pre_save(TPMState *s);
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void tpm_tis_reset(TPMState *s);
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enum TPMVersion tpm_tis_get_tpm_version(TPMState *s);
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void tpm_tis_request_completed(TPMState *s, int ret);
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uint32_t tpm_tis_read_data(TPMState *s, hwaddr addr, unsigned size);
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void tpm_tis_write_data(TPMState *s, hwaddr addr, uint64_t val, uint32_t size);
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uint16_t tpm_tis_get_checksum(TPMState *s);
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#endif /* TPM_TPM_TIS_H */
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