139fdb3ed8
Qemu already supports devices attached to ISA and sysbus. This drop adds
support for the I2C bus attached TPM devices. I2C model only supports
TPM2 protocol.
This commit includes changes for the common code.
- Added I2C emulation model. Logic was added in the model to temporarily
cache the data as I2C interface works per byte basis.
- New tpm type "tpm-tis-i2c" added for I2C support. The user has to
provide this string on command line.
Testing:
TPM I2C device module is tested using SWTPM (software based TPM
package). Qemu uses the rainier machine and is connected to swtpm over
the socket interface.
The command to start swtpm is as follows:
$ swtpm socket --tpmstate dir=/tmp/mytpm1 \
--ctrl type=unixio,path=/tmp/mytpm1/swtpm-sock \
--tpm2 --log level=100
The command to start qemu is as follows:
$ qemu-system-arm -M rainier-bmc -nographic \
-kernel ${IMAGEPATH}/fitImage-linux.bin \
-dtb ${IMAGEPATH}/aspeed-bmc-ibm-rainier.dtb \
-initrd ${IMAGEPATH}/obmc-phosphor-initramfs.rootfs.cpio.xz \
-drive file=${IMAGEPATH}/obmc-phosphor-image.rootfs.wic.qcow2,if=sd,index=2 \
-net nic -net user,hostfwd=:127.0.0.1:2222-:22,hostfwd=:127.0.0.1:2443-:443 \
-chardev socket,id=chrtpm,path=/tmp/mytpm1/swtpm-sock \
-tpmdev emulator,id=tpm0,chardev=chrtpm \
-device tpm-tis-i2c,tpmdev=tpm0,bus=aspeed.i2c.bus.12,address=0x2e
Signed-off-by: Ninad Palsule <ninad@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: 20230414220754.1191476-4-ninadpalsule@us.ibm.com
95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*
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* Public TPM functions
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*
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* Copyright (C) 2011-2013 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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*
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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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#ifndef QEMU_TPM_H
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#define QEMU_TPM_H
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#include "qapi/qapi-types-tpm.h"
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#include "qom/object.h"
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#ifdef CONFIG_TPM
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int tpm_config_parse(QemuOptsList *opts_list, const char *optarg);
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int tpm_init(void);
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void tpm_cleanup(void);
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typedef enum TPMVersion {
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TPM_VERSION_UNSPEC = 0,
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TPM_VERSION_1_2 = 1,
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TPM_VERSION_2_0 = 2,
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} TPMVersion;
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#define TYPE_TPM_IF "tpm-if"
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typedef struct TPMIfClass TPMIfClass;
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DECLARE_CLASS_CHECKERS(TPMIfClass, TPM_IF,
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TYPE_TPM_IF)
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#define TPM_IF(obj) \
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INTERFACE_CHECK(TPMIf, (obj), TYPE_TPM_IF)
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typedef struct TPMIf TPMIf;
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struct TPMIfClass {
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InterfaceClass parent_class;
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enum TpmModel model;
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void (*request_completed)(TPMIf *obj, int ret);
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enum TPMVersion (*get_version)(TPMIf *obj);
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};
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#define TYPE_TPM_TIS_ISA "tpm-tis"
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#define TYPE_TPM_TIS_SYSBUS "tpm-tis-device"
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#define TYPE_TPM_CRB "tpm-crb"
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#define TYPE_TPM_SPAPR "tpm-spapr"
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#define TYPE_TPM_TIS_I2C "tpm-tis-i2c"
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#define TPM_IS_TIS_ISA(chr) \
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object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_ISA)
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#define TPM_IS_TIS_SYSBUS(chr) \
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object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_SYSBUS)
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#define TPM_IS_CRB(chr) \
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object_dynamic_cast(OBJECT(chr), TYPE_TPM_CRB)
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#define TPM_IS_SPAPR(chr) \
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object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR)
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#define TPM_IS_TIS_I2C(chr) \
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object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_I2C)
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/* returns NULL unless there is exactly one TPM device */
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static inline TPMIf *tpm_find(void)
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{
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Object *obj = object_resolve_path_type("", TYPE_TPM_IF, NULL);
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return TPM_IF(obj);
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}
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static inline TPMVersion tpm_get_version(TPMIf *ti)
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{
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if (!ti) {
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return TPM_VERSION_UNSPEC;
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}
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return TPM_IF_GET_CLASS(ti)->get_version(ti);
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}
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#else /* CONFIG_TPM */
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#define tpm_init() (0)
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#define tpm_cleanup()
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/* needed for an alignment check in non-tpm code */
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static inline Object *TPM_IS_CRB(Object *obj)
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{
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return NULL;
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}
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#endif /* CONFIG_TPM */
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#endif /* QEMU_TPM_H */
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