linux-kernel - Re: [PATCH] tpm: Define TPM2_SPACE_BUFFER_SIZE to replace the use of PAGE

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Message-ID: <4f93bca3-e5c2-1074-f273-628ed603c139@linux.ibm.com>
Date:   Mon, 6 Jul 2020 14:06:09 -0400
From:   Stefan Berger <stefanb@...ux.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        linux-integrity@...r.kernel.org, stable@...r.kernel.org,
        Peter Huewe <peterhuewe@....de>,
        Jason Gunthorpe <jgg@...pe.ca>, Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sumit Garg <sumit.garg@...aro.org>,
        Alexey Klimov <aklimov@...hat.com>,
        James Bottomley <James.Bottomley@...senpartnership.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tpm: Define TPM2_SPACE_BUFFER_SIZE to replace the use of
 PAGE_SIZE

On 7/3/20 11:56 PM, Jarkko Sakkinen wrote:
> On Thu, Jul 02, 2020 at 04:55:44PM -0700, Jerry Snitselaar wrote:
>> On Fri Jul 03 20, Jarkko Sakkinen wrote:
>>> The size of the buffers for storing context's and sessions can vary from
>>> arch to arch as PAGE_SIZE can be anything between 4 kB and 256 kB (the
>>> maximum for PPC64). Define a fixed buffer size set to 16 kB. This should be
>>> enough for most use with three handles (that is how many we allow at the
>>> moment). Parametrize the buffer size while doing this, so that it is easier
>>> to revisit this later on if required.
>>>
>>> Reported-by: Stefan Berger <stefanb@...ux.ibm.com>
>>> Cc: stable@...r.kernel.org
>>> Fixes: 745b361e989a ("tpm: infrastructure for TPM spaces")
>>> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
>> Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
> Thank you.
>
> Now only needs tested-by from Stefan.


Tested-by: Stefan Berger <stefanb@...ux.ibm.com>


>
> /Jarkko