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fwupd/plugins/tpm
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Richard Hughes b333e0045c Split out a shared system context 
There is a lot of code in fwupd that just assigns a shared object type to
a FuPlugin, and then for each device on that plugin assigns that same shared
object to each FuDevice.

Rather than proxy several kinds of information stores over two different levels
of abstraction create a 'context' which contains the shared *system* state
between the daemon, the plugins and the daemon.

This will allow us to hold other per-machine state in the future, for instance
the system battery level or AC state.
2021-04-01 21:11:29 +01:00
..
fu-plugin-tpm.c Split out a shared system context 2021-04-01 21:11:29 +01:00
fu-tpm-device.c Call the superclass directly from subclassed devices 2021-02-18 16:18:34 +00:00
fu-tpm-device.h Add many new plugins to support for the Host Security ID 2020-05-12 21:20:18 +01:00
meson.build Move the plugin build logic to the plugins themselves 2021-02-18 14:46:20 +00:00
README.md Add external interface messages 2020-10-26 12:05:20 -05:00
tpm.quirk Simplify the quirk file format 2021-03-03 08:30:34 +00:00

README.md

TPM Support

Introduction

This allows enumerating Trusted Platform Modules, also known as "TPM" devices, although it does not allow the user to update the firmware on them.

GUID Generation

These devices use custom GUIDs:

  • TPM\VEN_$(manufacturer)&DEV_$(type)
  • TPM\VEN_$(manufacturer)&MOD_$(vendor-string)
  • TPM\VEN_$(manufacturer)&DEV_$(type)_VER_$(family),
  • TPM\VEN_$(manufacturer)&MOD_$(vendor-string)_VER_$(family)

...where family is either 2.0 or 1.2

Example GUIDs from a real system containing a TPM from Intel:

  Guid:                 34801700-3a50-5b05-820c-fe14580e4c2d <- TPM\VEN_INTC&DEV_0000
  Guid:                 03f304f4-223e-54f4-b2c1-c3cf3b5817c6 <- TPM\VEN_INTC&DEV_0000&VER_2.0

Vendor ID Security

The device is not upgradable and thus requires no vendor ID set.

External interface access

This plugin uses the tpm2-tss library to access the TPM. It requires access to /sys/class/tpm.