Messages in this thread | | | Date | Mon, 14 Mar 2016 18:26:02 +0200 | From | Jarkko Sakkinen <> | Subject | Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple emulated TPMs |
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On Sun, Mar 13, 2016 at 06:54:38PM -0400, Stefan Berger wrote: > This patch implements a proxy driver for supporting multiple emulated TPMs > in a system. > > The driver implements a device /dev/vtpmx that is used to created > a client device pair /dev/tpmX (e.g., /dev/tpm10) and a server side that > is accessed using a file descriptor returned by an ioctl. > The device /dev/tpmX is the usual TPM device created by the core TPM > driver. Applications or kernel subsystems can send TPM commands to it > and the corresponding server-side file descriptor receives these > commands and delivers them to an emulated TPM.
Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
My testing procedure was:
* Wine running TPM 2.0 simulator on the host side. [1] * QEMU running an OS image with this patch. [2] * Wrote a script for proxying the simulator: tpm2-simulator-vtpm. [3] * Run some smoke tests: python -m unittest -v tpm2_smoke. [3]
[1] http://research.microsoft.com/en-us/downloads/35116857-e544-4003-8e7b-584182dc6833/ [2] git://git.infradead.org/users/jjs/buildroot-tpmdd.git [3] git://git.infradead.org/users/jjs/tpm2-scripts.git
/Jarkko
> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> > CC: linux-kernel@vger.kernel.org > CC: linux-doc@vger.kernel.org > CC: linux-api@vger.kernel.org > --- > drivers/char/tpm/Kconfig | 10 + > drivers/char/tpm/Makefile | 1 + > drivers/char/tpm/tpm_vtpm_proxy.c | 572 ++++++++++++++++++++++++++++++++++++++ > include/uapi/linux/Kbuild | 1 + > include/uapi/linux/vtpm_proxy.h | 42 +++ > 5 files changed, 626 insertions(+) > create mode 100644 drivers/char/tpm/tpm_vtpm_proxy.c > create mode 100644 include/uapi/linux/vtpm_proxy.h
/Jarkko
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