linux-kernel - Re: [tpmdd-devel] [PATCH] TPM: Issue TPM_STARTUP at driver load if the TPM has not been started

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Message-ID: <CAEwYmTLuxx8UKvkF7cE4LF++K77mDkiB3e6MD6Eao9KYJreO8w@mail.gmail.com>
Date:	Mon, 1 Oct 2012 08:57:11 -0400
From:	Jonathan McCune <jonmccune@...il.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	linux-kernel@...r.kernel.org, tpmdd-devel@...ts.sourceforge.net
Subject: Re: [tpmdd-devel] [PATCH] TPM: Issue TPM_STARTUP at driver load if
 the TPM has not been started

Hi Jason,

On Sun, Sep 30, 2012 at 7:30 PM, Jason Gunthorpe
<jgunthorpe@...idianresearch.com> wrote:
> The TPM will respond to TPM_GET_CAP with TPM_ERR_INVALID_POSTINIT if
> TPM_STARTUP has not been issued. This will result in the TPM driver
> failing to load and no way to recover. Detect this and automatically
> issue TPM_STARTUP.
>
> This is for embedded applications where the kernel is the first thing
> to touch the TPM.

I welcome such functionality.  Thanks for your efforts.

Regards,
-Jon
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