linux-kernel - Re: [PATCH v6 08/11] tpm: Driver for supporting multiple emulated TPMs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CALCETrXDfHRdFnqK15o1yD8106sn4e6Susr9j7=GGi4sb-p0qQ@mail.gmail.com>
Date:	Wed, 9 Mar 2016 10:01:05 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Stefan Berger <stefanb@...ux.vnet.ibm.com>
Cc:	tpmdd-devel@...ts.sourceforge.net,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>
Subject: Re: [PATCH v6 08/11] tpm: Driver for supporting multiple emulated TPMs

On Wed, Mar 9, 2016 at 9:39 AM, Stefan Berger
<stefanb@...ux.vnet.ibm.com> wrote:
> This patch implements a 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.

Nifty!

Is anyone considering writing a modification or replacement of
trousers that creates claims the real tpm and exposes a vtpm that
handles multiplexing internally?  Does the vtpm driver intelligently
support multiple simultaneous clients?

--Andy