linux-kernel - Re: [PATCH] tpm: consolidate the TPM startup code

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Message-ID: <20170620193152.GA3368@obsidianresearch.com>
Date:   Tue, 20 Jun 2017 13:31:52 -0600
From:   Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     tpmdd-devel@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org,
        Peter Huewe <peterhuewe@....de>,
        Marcel Selhorst <tpmdd@...horst.net>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm: consolidate the TPM startup code

On Tue, Jun 20, 2017 at 08:13:34PM +0200, Jarkko Sakkinen wrote:
> Consolidated all the "manual" TPM startup code to a single function
> in order to make code flows a bit cleaner and migrate to tpm_buf.
> 
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>  drivers/char/tpm/tpm-interface.c | 67 +++++++++++++++++++++++++---------------
>  drivers/char/tpm/tpm.h           |  6 +---
>  drivers/char/tpm/tpm2-cmd.c      | 32 +------------------
>  3 files changed, 44 insertions(+), 61 deletions(-)

Makes sense to me

> diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
> index d2b4df6d9894..fbef47d8bd06 100644
> +++ b/drivers/char/tpm/tpm-interface.c
> @@ -540,6 +540,47 @@ ssize_t tpm_transmit_cmd(struct tpm_chip *chip, struct tpm_space *space,
>  }
>  EXPORT_SYMBOL_GPL(tpm_transmit_cmd);
>  
> +#define TPM_ORD_STARTUP 153
> +#define TPM_ST_CLEAR 1

We should really have a tpm1.h and tpm2.h that has all these various
constants and things instead of open coding them randomly all over..

Jason