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/Linux-v5.15/drivers/char/tpm/
DKconfig3 # TPM device configuration
7 tristate "TPM Hardware Support"
13 If you have a TPM security chip in your system, which
21 will be called tpm. If unsure, say N.
23 1) For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI
31 bool "TPM HW Random Number Generator support"
35 This setting exposes the TPM's Random Number Generator as a hwrng
36 device. This allows the kernel to collect randomness from the TPM at
37 boot, and provides the TPM randomines in /dev/hwrng.
44 TCG TIS TPM core driver. It implements the TPM TCG TIS logic and hooks
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DMakefile3 # Makefile for the kernel tpm device drivers.
5 obj-$(CONFIG_TCG_TPM) += tpm.o
6 tpm-y := tpm-chip.o
7 tpm-y += tpm-dev-common.o
8 tpm-y += tpm-dev.o
9 tpm-y += tpm-interface.o
10 tpm-y += tpm1-cmd.o
11 tpm-y += tpm2-cmd.o
12 tpm-y += tpmrm-dev.o
13 tpm-y += tpm2-space.o
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Dtpm_tis_i2c_cr50.c5 * Based on Infineon TPM driver by Peter Huewe.
32 #define TPM_CR50_TIMEOUT_NOIRQ_MS 20 /* Timeout for TPM ready without IRQ */
61 * @tpm_info: TPM chip information.
81 * tpm_cr50_i2c_wait_tpm_ready() - Wait for tpm to signal ready.
82 * @chip: A TPM chip.
85 * delay for the TPM to be ready.
101 /* Wait for interrupt to indicate TPM is ready to respond */ in tpm_cr50_i2c_wait_tpm_ready()
104 dev_warn(&chip->dev, "Timeout waiting for TPM ready\n"); in tpm_cr50_i2c_wait_tpm_ready()
112 * tpm_cr50_i2c_enable_tpm_irq() - Enable TPM irq.
113 * @chip: A TPM chip.
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Dtpm1-cmd.c12 * Device driver for TCG/TCPA TPM (trusted platform module).
23 #include "tpm.h"
31 * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
283 * @chip: TPM chip to use.
284 * @ordinal: TPM command ordinal.
315 * tpm1_startup() - turn on the TPM
316 * @chip: TPM chip to use
318 * Normally the firmware should start the TPM. This function is provided as a
320 * example when a TPM emulator is used.
329 dev_info(&chip->dev, "starting up the TPM manually\n"); in tpm1_startup()
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Dtpm-interface.c14 * Device driver for TCG/TCPA TPM (trusted platform module).
17 * Note, the TPM chip is not interrupt driven (only polling)
30 #include "tpm.h"
33 * Bug workaround - some TPM's don't flush the most
44 * @chip: TPM chip to use.
45 * @ordinal: TPM command ordinal.
137 * tpm_transmit - Internal kernel interface to transmit TPM commands.
138 * @chip: a TPM chip to use
139 * @buf: a TPM command buffer
140 * @bufsiz: length of the TPM command buffer
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Dtpm_vtpm_proxy.c24 #include "tpm.h"
43 size_t req_len; /* length of queued TPM request */
44 size_t resp_len; /* length of queued TPM response */
47 struct work_struct work; /* task that retrieves TPM timeouts */
62 * vtpm_proxy_fops_read - Read TPM commands on 'server side'
117 * vtpm_proxy_fops_write - Write TPM responses on 'server side'
211 *@proxy_dev: tpm proxy device
221 /* no more TPM responses -- wake up anyone waiting for them */ in vtpm_proxy_fops_undo_open()
254 * Functions invoked by the core TPM driver to send TPM commands to
259 * Called when core TPM driver reads TPM responses from 'server side'
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Dtpm2-cmd.c14 #include "tpm.h"
49 * @ordinal: TPM command ordinal.
120 * @chip: TPM chip to use.
121 * @ordinal: TPM command ordinal.
154 * @chip: TPM chip to use.
229 * @chip: TPM chip to use.
278 * tpm2_get_random() - get random bytes from the TPM RNG
286 * -errno otherwise (positive TPM return codes are masked to -EIO)
345 * @chip: TPM chip to use
384 * -errno or a TPM return code otherwise
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Dtpm-chip.c15 * TPM chip management routines.
26 #include "tpm.h"
93 * tpm_chip_start() - power on the TPM
94 * @chip: a TPM chip to use
126 * tpm_chip_stop() - power off the TPM
127 * @chip: a TPM chip to use
194 * tpm_default_chip() - find a TPM chip and get a reference to it
221 * tpm_find_get_ops() - find and reserve a TPM chip
224 * Finds a TPM chip and reserves its class device and operations. The chip must
226 * This function is for internal use only. It supports existing TPM callers
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Dtpm_i2c_atmel.c3 * ATMEL I2C TPM AT97SC3204T
11 * Teddy Reed determined the basic I2C command flow, unlike other I2C TPM
12 * devices the raw TCG formatted TPM command data is written via I2C and then
13 * raw TCG formatted TPM command data is returned via I2C.
23 #include "tpm.h"
104 dev_err(&chip->dev, "TPM operation cancellation was requested, but is not supported"); in i2c_atmel_cancel()
113 /* The TPM fails the I2C read until it is ready, so we do the entire in i2c_atmel_read_status()
120 /* Once the TPM has completed the command the command remains readable in i2c_atmel_read_status()
176 * information seems to be read via TPM commands. Thus we rely on the in i2c_atmel_probe()
177 * TPM startup process in the common code to detect the device. */ in i2c_atmel_probe()
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/Linux-v5.15/drivers/pwm/
Dpwm-imx-tpm.c6 * - The TPM counter and period counter are shared between
92 struct imx_tpm_pwm_chip *tpm = to_imx_tpm_pwm_chip(chip); in pwm_imx_tpm_round_state() local
96 rate = clk_get_rate(tpm->clk); in pwm_imx_tpm_round_state()
139 struct imx_tpm_pwm_chip *tpm = to_imx_tpm_pwm_chip(chip); in pwm_imx_tpm_get_state() local
144 state->period = tpm->real_period; in pwm_imx_tpm_get_state()
147 rate = clk_get_rate(tpm->clk); in pwm_imx_tpm_get_state()
148 val = readl(tpm->base + PWM_IMX_TPM_SC); in pwm_imx_tpm_get_state()
150 tmp = readl(tpm->base + PWM_IMX_TPM_CnV(pwm->hwpwm)); in pwm_imx_tpm_get_state()
155 val = readl(tpm->base + PWM_IMX_TPM_CnSC(pwm->hwpwm)); in pwm_imx_tpm_get_state()
175 struct imx_tpm_pwm_chip *tpm = to_imx_tpm_pwm_chip(chip); in pwm_imx_tpm_apply_hw() local
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/Linux-v5.15/Documentation/ABI/stable/
Dsysfs-class-tpm1 What: /sys/class/tpm/tpmX/device/
5 Description: The device/ directory under a specific TPM instance exposes
6 the properties of that TPM chip
9 What: /sys/class/tpm/tpmX/device/active
13 Description: The "active" property prints a '1' if the TPM chip is accepting
14 commands. An inactive TPM chip still contains all the state of
17 commands. See the TPM Main Specification part 2, Structures,
21 What: /sys/class/tpm/tpmX/device/cancel
26 pending TPM command. Writing any value to cancel will call the
27 TPM vendor specific cancel operation.
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/Linux-v5.15/Documentation/security/tpm/
Dtpm_vtpm_proxy.rst2 Virtual TPM Proxy Driver for Linux Containers
14 The goal of this work is to provide TPM functionality to each Linux
15 container. This allows programs to interact with a TPM in a container
16 the same way they interact with a TPM on the physical system. Each
17 container gets its own unique, emulated, software TPM.
22 To make an emulated software TPM available to each container, the container
23 management stack needs to create a device pair consisting of a client TPM
27 is passed to the TPM emulator. Software inside the container can then send
28 TPM commands using the character device and the emulator will receive the
31 To support this, the virtual TPM proxy driver provides a device ``/dev/vtpmx``
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Dxen-tpmfront.rst2 Virtual TPM interface for Xen
9 Linux, and a basic understanding of the TPM and vTPM concepts.
14 The goal of this work is to provide a TPM functionality to a virtual guest
16 a TPM in a virtual system the same way they interact with a TPM on the physical
17 system. Each guest gets its own unique, emulated, software TPM. However, each
19 which seals the secrets to the Physical TPM. If the process of creating each of
21 the chain of trust rooted in the hardware TPM to virtual machines in Xen. Each
66 | Hardware TPM |
74 Linux kernel virtual TPM frontend driver. This driver
78 Mini-os TPM backend driver. The Linux frontend driver
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/Linux-v5.15/drivers/char/tpm/st33zp24/
Di2c.c3 * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
14 #include <linux/tpm.h>
17 #include "../tpm.h"
31 * @param: tpm_register, the tpm tis register where the data should be written
48 * @param: tpm_register, the tpm tis register where the data should be read
49 * @param: tpm_data, the TPM response
50 * @param: tpm_size, tpm TPM response size to read.
70 * @param: tpm_register, the tpm tis register where the data should be written
86 * @param: tpm_register, the tpm tis register where the data should be read
87 * @param: tpm_data, the TPM response
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Dst33zp24.c3 * STMicroelectronics TPM Linux driver for TPM ST33ZP24
21 #include "../tpm.h"
65 * @param: tpm_dev, the tpm device device.
80 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
93 * @param: chip, the tpm chip description
107 * @param: chip, the tpm chip description
126 * request_locality request the TPM locality
160 * @param: chip, the tpm chip description.
232 * @param: chip, the tpm chip description
237 * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
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Dspi.c3 * STMicroelectronics TPM SPI Linux driver for TPM ST33ZP24
14 #include <linux/tpm.h>
17 #include "../tpm.h"
43 * TPM command can be up to 2048 byte, A TPM response can be up to
50 * 2048 (for the TPM command) + 1024 (for the TPM answer). We need
96 * @param: tpm_register, the tpm tis register where the data should be written
139 * @param: tpm_register, the tpm tis register where the data should be read
140 * @param: tpm_data, the TPM response
141 * @param: tpm_size, tpm TPM response size to read.
180 * @param: tpm_register, the tpm tis register where the data should be read
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DKconfig6 TPM1.2 logic and hooks into the TPM kernel APIs. Physical layers will
13 tristate "STMicroelectronics TPM Interface Specification 1.2 Interface (I2C)"
17 This module adds support for the STMicroelectronics TPM security chip
23 tristate "STMicroelectronics TPM Interface Specification 1.2 Interface (SPI)"
27 This module adds support for the STMicroelectronics TPM security chip
/Linux-v5.15/Documentation/security/keys/
Dtrusted-encrypted.rst28 (1) TPM (Trusted Platform Module: hardware device)
30 Rooted to Storage Root Key (SRK) which never leaves the TPM that
40 (1) TPM
51 (1) TPM
54 values, and only unsealed by the TPM, if PCRs and blob integrity
68 (1) TPM
80 The strength and appropriateness of a particular TPM or TEE for a given
95 * TPM (hardware device) based RNG
121 Trusted Keys usage: TPM
124 TPM 1.2: By default, trusted keys are sealed under the SRK, which has the
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/Linux-v5.15/security/integrity/ima/
Dima_init.c30 * Calculate the boot aggregate, a hash over tpm registers 0-7,
31 * assuming a TPM chip exists, and zeroes if the TPM chip does not
35 * If a tpm chip does not exist, indicate the core root of trust is
64 * With TPM 2.0 hash agility, TPM chips could support multiple TPM in ima_add_boot_aggregate()
68 * Use the same hash algorithm for reading the TPM PCRs as for in ima_add_boot_aggregate()
71 * TCG required banks - SHA256 for TPM 2.0, SHA1 for TPM 1.2. in ima_add_boot_aggregate()
72 * Ultimately select SHA1 also for TPM 2.0 if the SHA256 PCR bank in ima_add_boot_aggregate()
125 pr_info("No TPM chip found, activating TPM-bypass!\n"); in ima_init()
138 /* It can be called before ima_init_digests(), it does not use TPM. */ in ima_init()
/Linux-v5.15/Documentation/devicetree/bindings/timer/
Dnxp,tpm-timer.yaml4 $id: http://devicetree.org/schemas/timer/nxp,tpm-timer.yaml#
7 title: NXP Low Power Timer/Pulse Width Modulation Module (TPM)
13 The Timer/PWM Module (TPM) supports input capture, output compare,
17 power modes. TPM can support global counter bus where one TPM drives
22 const: fsl,imx7ulp-tpm
32 - description: SoC TPM ipg clock
33 - description: SoC TPM per clock
55 compatible = "fsl,imx7ulp-tpm";
/Linux-v5.15/include/uapi/linux/
Dvtpm_proxy.h24 * enum vtpm_proxy_flags - flags for the proxy TPM
25 * @VTPM_PROXY_FLAG_TPM2: the proxy TPM uses TPM 2.0 protocol
34 * @flags: flags for the proxy TPM
35 * @tpm_num: index of the TPM device
36 * @fd: the file descriptor used by the proxy TPM
37 * @major: the major number of the TPM device
38 * @minor: the minor number of the TPM device
/Linux-v5.15/Documentation/ABI/testing/
Dsysfs-driver-ppi1 What: /sys/class/tpm/tpmX/ppi/
7 Presence Interface). Only if TPM is supported by BIOS, this
18 What: /sys/class/tpm/tpmX/ppi/version
26 What: /sys/class/tpm/tpmX/ppi/request
36 What: /sys/class/tpm/tpmX/ppi/response
45 What: /sys/class/tpm/tpmX/ppi/transition_action
55 What: /sys/class/tpm/tpmX/ppi/tcg_operations
66 What: /sys/class/tpm/tpmX/ppi/vs_operations
/Linux-v5.15/Documentation/devicetree/bindings/security/tpm/
Dtpm-i2c.txt1 * Device Tree Bindings for I2C based Trusted Platform Module(TPM)
6 - label : human readable string describing the device, eg. "tpm"
13 - powered-while-suspended: present when the TPM is left powered on between
17 Example (for OpenPower Systems with Nuvoton TPM 2.0 on I2C)
20 tpm@57 {
22 label = "tpm";
Dtpm_tis_mmio.txt3 The TCG defines multi vendor standard for accessing a TPM chip, this
4 is the standard protocol defined to access the TPM via MMIO. Typically
7 Refer to the 'TCG PC Client Specific TPM Interface Specification (TIS)' TCG
13 "tcg,tpm-tis-mmio". Valid chip strings are:
21 compatible = "atmel,at97sc3204", "tcg,tpm-tis-mmio";
/Linux-v5.15/drivers/firmware/efi/
Dtpm.c37 * Reserve the memory associated with the TPM Event Log configuration table.
49 * first entry in the TPM log, so bail here. in efi_tpm_eventlog_init()
56 pr_err("Failed to map TPM Event Log table @ 0x%lx\n", in efi_tpm_eventlog_init()
66 pr_info("TPM Final Events table not present\n"); in efi_tpm_eventlog_init()
69 pr_warn(FW_BUG "TPM Final Events table invalid\n"); in efi_tpm_eventlog_init()
76 pr_err("Failed to map TPM Final Event Log table @ 0x%lx\n", in efi_tpm_eventlog_init()
95 pr_err(FW_BUG "Failed to parse event in TPM Final Events Log\n"); in efi_tpm_eventlog_init()

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