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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-16 13:34:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-09-16 13:34:04 -0700 |
| commit | a7bd4bcf138e7ec95c00d55fee158f6be378029b (patch) | |
| tree | e7fabdb4357243ebe96e757a3ea9a0532bc66b36 /Documentation | |
| parent | Merge tag 'core-process-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux (diff) | |
| parent | tpm/tpm_ftpm_tee: Document fTPM TEE driver (diff) | |
| download | linux-dev-a7bd4bcf138e7ec95c00d55fee158f6be378029b.tar.xz linux-dev-a7bd4bcf138e7ec95c00d55fee158f6be378029b.zip | |
Merge tag 'tpmdd-next-20190902' of git://git.infradead.org/users/jjs/linux-tpmdd
Pull tpm updates from Jarkko Sakkinen:
"A new driver for fTPM living inside ARM TEE was added this round.
In addition to that, there are three bug fixes and one clean up"
* tag 'tpmdd-next-20190902' of git://git.infradead.org/users/jjs/linux-tpmdd:
tpm/tpm_ftpm_tee: Document fTPM TEE driver
tpm/tpm_ftpm_tee: A driver for firmware TPM running inside TEE
tpm: Remove a deprecated comments about implicit sysfs locking
tpm_tis_core: Set TPM_CHIP_FLAG_IRQ before probing for interrupts
tpm_tis_core: Turn on the TPM before probing IRQ's
MAINTAINERS: fix style in KEYS-TRUSTED entry
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 | ||||
| -rw-r--r-- | Documentation/security/tpm/index.rst | 1 | ||||
| -rw-r--r-- | Documentation/security/tpm/tpm_ftpm_tee.rst | 27 |
3 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml index 6992bbbbffab..d61a203138cb 100644 --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml @@ -575,6 +575,8 @@ patternProperties: description: Micro Crystal AG "^micron,.*": description: Micron Technology Inc. + "^microsoft,.*": + description: Microsoft Corporation "^mikroe,.*": description: MikroElektronika d.o.o. "^miniand,.*": diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst index 3296533e54cf..487852fda33e 100644 --- a/Documentation/security/tpm/index.rst +++ b/Documentation/security/tpm/index.rst @@ -6,3 +6,4 @@ Trusted Platform Module documentation tpm_vtpm_proxy xen-tpmfront + tpm_ftpm_tee diff --git a/Documentation/security/tpm/tpm_ftpm_tee.rst b/Documentation/security/tpm/tpm_ftpm_tee.rst new file mode 100644 index 000000000000..8c2bae16e3d9 --- /dev/null +++ b/Documentation/security/tpm/tpm_ftpm_tee.rst @@ -0,0 +1,27 @@ +============================================= +Firmware TPM Driver +============================================= + +This document describes the firmware Trusted Platform Module (fTPM) +device driver. + +Introduction +============ + +This driver is a shim for firmware implemented in ARM's TrustZone +environment. The driver allows programs to interact with the TPM in the same +way they would interact with a hardware TPM. + +Design +====== + +The driver acts as a thin layer that passes commands to and from a TPM +implemented in firmware. The driver itself doesn't contain much logic and is +used more like a dumb pipe between firmware and kernel/userspace. + +The firmware itself is based on the following paper: +https://www.microsoft.com/en-us/research/wp-content/uploads/2017/06/ftpm1.pdf + +When the driver is loaded it will expose ``/dev/tpmX`` character devices to +userspace which will enable userspace to communicate with the firmware TPM +through this device. |