From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jarkko Sakkinen Subject: Re: [PATCH v8 08/10] tpm: Proxy driver for supporting multiple emulated TPMs Date: Mon, 14 Mar 2016 18:26:02 +0200 Message-ID: <20160314162602.GA24203@intel.com> References: <1457909680-14085-1-git-send-email-stefanb@linux.vnet.ibm.com> <1457909680-14085-9-git-send-email-stefanb@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1457909680-14085-9-git-send-email-stefanb@linux.vnet.ibm.com> Sender: owner-linux-security-module@vger.kernel.org To: Stefan Berger Cc: tpmdd-devel@lists.sourceforge.net, jgunthorpe@obsidianresearch.com, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-api@vger.kernel.org List-Id: tpmdd-devel@lists.sourceforge.net 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 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 > 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