| Message ID | 20190625195209.13663-3-sashal@kernel.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | fTPM: firmware TPM running in TEE | expand |
On 6/25/19 12:52 PM, Sasha Levin wrote: > This patch adds basic documentation to describe the new fTPM driver. > > Signed-off-by: Sasha Levin <sashal@kernel.org> > --- > Documentation/security/tpm/index.rst | 1 + > Documentation/security/tpm/tpm_ftpm_tee.rst | 31 +++++++++++++++++++++ > 2 files changed, 32 insertions(+) > create mode 100644 Documentation/security/tpm/tpm_ftpm_tee.rst > > diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst > index af77a7bbb070..15783668644f 100644 > --- a/Documentation/security/tpm/index.rst > +++ b/Documentation/security/tpm/index.rst > @@ -4,4 +4,5 @@ Trusted Platform Module documentation > > .. toctree:: > > + tpm_ftpm_tee > tpm_vtpm_proxy > diff --git a/Documentation/security/tpm/tpm_ftpm_tee.rst b/Documentation/security/tpm/tpm_ftpm_tee.rst > new file mode 100644 > index 000000000000..29c2f8b5ed10 > --- /dev/null > +++ b/Documentation/security/tpm/tpm_ftpm_tee.rst > @@ -0,0 +1,31 @@ > +============================================= > +Firmware TPM Driver > +============================================= > + > +| Authors: > +| Thirupathaiah Annapureddy <thiruan@microsoft.com> > +| Sasha Levin <sashal@kernel.org> > + > +This document describes the firmware Trusted Platform Module (fTPM) > +device driver. > + > +Introduction > +============ > + > +This driver is a shim for a firmware implemented in ARM's TrustZone for firmware > +environment. The driver allows programs to interact with the TPM in the same > +way the would interact with a hardware TPM. they > + > +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 TPM > +through this device. > Oh, that's the same comments that I made on 2019-06-18: https://marc.info/?l=linux-integrity&m=156087157019368&w=2
On Tue, Jun 25, 2019 at 12:59:02PM -0700, Randy Dunlap wrote: >On 6/25/19 12:52 PM, Sasha Levin wrote: >> This patch adds basic documentation to describe the new fTPM driver. >> >> Signed-off-by: Sasha Levin <sashal@kernel.org> >> --- >> Documentation/security/tpm/index.rst | 1 + >> Documentation/security/tpm/tpm_ftpm_tee.rst | 31 +++++++++++++++++++++ >> 2 files changed, 32 insertions(+) >> create mode 100644 Documentation/security/tpm/tpm_ftpm_tee.rst >> >> diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst >> index af77a7bbb070..15783668644f 100644 >> --- a/Documentation/security/tpm/index.rst >> +++ b/Documentation/security/tpm/index.rst >> @@ -4,4 +4,5 @@ Trusted Platform Module documentation >> >> .. toctree:: >> >> + tpm_ftpm_tee >> tpm_vtpm_proxy >> diff --git a/Documentation/security/tpm/tpm_ftpm_tee.rst b/Documentation/security/tpm/tpm_ftpm_tee.rst >> new file mode 100644 >> index 000000000000..29c2f8b5ed10 >> --- /dev/null >> +++ b/Documentation/security/tpm/tpm_ftpm_tee.rst >> @@ -0,0 +1,31 @@ >> +============================================= >> +Firmware TPM Driver >> +============================================= >> + >> +| Authors: >> +| Thirupathaiah Annapureddy <thiruan@microsoft.com> >> +| Sasha Levin <sashal@kernel.org> >> + >> +This document describes the firmware Trusted Platform Module (fTPM) >> +device driver. >> + >> +Introduction >> +============ >> + >> +This driver is a shim for a firmware implemented in ARM's TrustZone > > for firmware > >> +environment. The driver allows programs to interact with the TPM in the same >> +way the would interact with a hardware TPM. > > they > >> + >> +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 > > TPM > >> +through this device. >> > >Oh, that's the same comments that I made on 2019-06-18: >https://marc.info/?l=linux-integrity&m=156087157019368&w=2 Appologies Randy, I've missed it. I'll send a new ver in a moment. Thanks! -- Thanks, Sasha
diff --git a/Documentation/security/tpm/index.rst b/Documentation/security/tpm/index.rst index af77a7bbb070..15783668644f 100644 --- a/Documentation/security/tpm/index.rst +++ b/Documentation/security/tpm/index.rst @@ -4,4 +4,5 @@ Trusted Platform Module documentation .. toctree:: + tpm_ftpm_tee tpm_vtpm_proxy diff --git a/Documentation/security/tpm/tpm_ftpm_tee.rst b/Documentation/security/tpm/tpm_ftpm_tee.rst new file mode 100644 index 000000000000..29c2f8b5ed10 --- /dev/null +++ b/Documentation/security/tpm/tpm_ftpm_tee.rst @@ -0,0 +1,31 @@ +============================================= +Firmware TPM Driver +============================================= + +| Authors: +| Thirupathaiah Annapureddy <thiruan@microsoft.com> +| Sasha Levin <sashal@kernel.org> + +This document describes the firmware Trusted Platform Module (fTPM) +device driver. + +Introduction +============ + +This driver is a shim for a firmware implemented in ARM's TrustZone +environment. The driver allows programs to interact with the TPM in the same +way the 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.
This patch adds basic documentation to describe the new fTPM driver. Signed-off-by: Sasha Levin <sashal@kernel.org> --- Documentation/security/tpm/index.rst | 1 + Documentation/security/tpm/tpm_ftpm_tee.rst | 31 +++++++++++++++++++++ 2 files changed, 32 insertions(+) create mode 100644 Documentation/security/tpm/tpm_ftpm_tee.rst