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From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Roberto Sassu <roberto.sassu@huawei.com>
Cc: zohar@linux.ibm.com, david.safford@ge.com, monty.wiseman@ge.com,
	matthewgarrett@google.com, linux-integrity@vger.kernel.org,
	linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
	linux-kernel@vger.kernel.org, silviu.vlasceanu@huawei.com
Subject: Re: [PATCH v9 1/6] tpm: dynamically allocate the allocated_banks array
Date: Fri, 1 Feb 2019 15:34:51 +0200	[thread overview]
Message-ID: <20190201133451.GA17861@linux.intel.com> (raw)
In-Reply-To: <20190201100641.26936-2-roberto.sassu@huawei.com>

On Fri, Feb 01, 2019 at 11:06:36AM +0100, Roberto Sassu wrote:
> This patch renames active_banks (member of tpm_chip) to allocated_banks,
> stores the number of allocated PCR banks in nr_allocated_banks (new member
> of tpm_chip), and replaces the static array with a pointer to a dynamically
> allocated array.
> 
> tpm2_get_pcr_allocation() determines if a PCR bank is allocated by checking
> the mask in the TPML_PCR_SELECTION structure returned by the TPM for
> TPM2_Get_Capability(). If a bank is not allocated, the TPM returns that
> bank in TPML_PCR_SELECTION, with all bits in the mask set to zero. In this
> case, the bank is not included in chip->allocated_banks, to avoid that TPM
> driver users unnecessarily calculate a digest for that bank.
> 
> One PCR bank with algorithm set to SHA1 is always allocated for TPM 1.x.
> 
> As a consequence of the introduction of nr_allocated_banks,
> tpm_pcr_extend() does not check anymore if the algorithm stored in tpm_chip
> is equal to zero.
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
> Tested-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>

/Jarkko

  reply	other threads:[~2019-02-01 13:35 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-01 10:06 [PATCH v9 0/6] tpm: retrieve digest size of unknown algorithms from TPM Roberto Sassu
2019-02-01 10:06 ` [PATCH v9 1/6] tpm: dynamically allocate the allocated_banks array Roberto Sassu
2019-02-01 13:34   ` Jarkko Sakkinen [this message]
2019-02-01 10:06 ` [PATCH v9 2/6] tpm: rename and export tpm2_digest and tpm2_algorithms Roberto Sassu
2019-02-01 13:36   ` Jarkko Sakkinen
2019-02-01 10:06 ` [PATCH v9 3/6] tpm: retrieve digest size of unknown algorithms with PCR read Roberto Sassu
2019-02-01 10:06 ` [PATCH v9 4/6] tpm: move tpm_chip definition to include/linux/tpm.h Roberto Sassu
2019-02-01 13:38   ` Jarkko Sakkinen
2019-02-04  8:58   ` kbuild test robot
2019-02-01 10:06 ` [PATCH v9 5/6] KEYS: trusted: explicitly use tpm_chip structure from tpm_default_chip() Roberto Sassu
2019-02-01 13:39   ` Jarkko Sakkinen
2019-02-01 10:06 ` [PATCH v9 6/6] tpm: pass an array of tpm_extend_digest structures to tpm_pcr_extend() Roberto Sassu
2019-02-01 13:39   ` Jarkko Sakkinen
2019-02-01 13:41     ` Jarkko Sakkinen
2019-02-01 14:33       ` Mimi Zohar
2019-02-01 17:33         ` Jarkko Sakkinen
2019-02-01 17:42           ` Jarkko Sakkinen
2019-02-01 19:15   ` Mimi Zohar
2019-02-04  9:14     ` Roberto Sassu
2019-02-04 12:07       ` Jarkko Sakkinen
2019-02-04 12:59         ` Mimi Zohar
2019-02-04 13:21         ` Roberto Sassu
2019-02-04 23:26           ` Jarkko Sakkinen
2019-02-04 23:30             ` Jarkko Sakkinen
2019-02-05 10:02     ` Roberto Sassu

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