# Re: \[PATCH v6 08/11\] tpm: Driver for supporting multiple emulated TPMs

- From: Andy Lutomirski \<hidden\>
- Date: 2016-03-09 18:01:33 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2016/03/4705649
- Thread: https://ratatoskr.run/linux-api/2016/03/4705635/t.md

```text
On Wed, Mar 9, 2016 at 9:39 AM, Stefan Berger
[ref] 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
```