linux-kernel - Re: [PATCH v2 3/4] tpm: Implement tpm2_init to call when TPM_OPS_AUTO

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Message-ID: <3813980a-6c5e-c99f-7b37-b20b72eb6a8a@linux.ibm.com>
Date:   Tue, 25 Feb 2020 13:20:39 -0500
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>
Cc:     linux-integrity@...r.kernel.org, aik@...abs.ru,
        david@...son.dropbear.id.au, linux-kernel@...r.kernel.org,
        nayna@...ux.vnet.ibm.com, gcwilson@...ux.ibm.com, jgg@...pe.ca
Subject: Re: [PATCH v2 3/4] tpm: Implement tpm2_init to call when
 TPM_OPS_AUTO_STARTUP is not set

On 2/25/20 12:00 PM, Jarkko Sakkinen wrote:
> On Thu, Feb 13, 2020 at 03:23:28PM -0500, Stefan Berger wrote:
>> From: Stefan Berger <stefanb@...ux.ibm.com>
>>
>> Implement tpm2_init() that gets the TPM 2 timeouts and command durations
>> and command code attributes. This function is to be called in case the
>> TPM_OPS_AUTO_STARTUP flag is not set and therefore tpm2_auto_startup()
>> is not called.
>>
>> Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>
> The commit makes zero effort trying to explain what the heck tpm_init()
> is and when it should be used and why the function name tpm2_init().

Are you saying the explanation of when to use tpm2_init above is not 
enough? 'bviously we are trying to cover the case of using the TPM 2 by 
a driver that doesn't use the TPM_OPS_AUTO_STARTUP flag and therefore 
the TPM 2 timeouts and command durations and command code attributes are 
not set as they would be if tpm2_auto_startup() was to be called and 
tpm2_init() is the alternative to call. I didn't like tpm2_init() 
either... any suggestions for a better name?

    Stefan


>
> /Jarkko