Eric Lee / smarc-fsl-linux-kernel

04 Apr, 2017

1 commit

  • 877c57d0d   tpm_crb: request and relinquish locality 0 ... Browse Code »

    This commit adds support for requesting and relinquishing locality 0 in
    tpm_crb for the course of command transmission.

    In order to achieve this, two new callbacks are added to struct
    tpm_class_ops:

    - request_locality
    - relinquish_locality

    With CRB interface you first set either requestAccess or relinquish bit
    from TPM_LOC_CTRL_x register and then wait for locAssigned and
    tpmRegValidSts bits to be set in the TPM_LOC_STATE_x register.

    The reason why were are doing this is to make sure that the driver
    will work properly with Intel TXT that uses locality 2. There's no
    explicit guarantee that it would relinquish this locality. In more
    general sense this commit enables tpm_crb to be a well behaving
    citizen in a multi locality environment.

    Signed-off-by: Jarkko Sakkinen
    Reviewed-by: Jerry Snitselaar
    Tested-by: Jerry Snitselaar

    Jarkko Sakkinen
     

19 Jul, 2016

1 commit

  • cae8b441f   tpm: Factor out common startup code ... Browse Code »

    The TCG standard startup sequence (get timeouts, tpm startup, etc) for
    TPM and TPM2 chips is being open coded in many drivers, move it into
    the core code.

    tpm_tis and tpm_crb are used as the basis for the core code
    implementation and the easy drivers are converted. In the process
    several small drivers bugs relating to error handling this flow
    are fixed.

    For now the flag TPM_OPS_AUTO_STARTUP is optional to allow a staged
    driver roll out, but ultimately all drivers should use this flow and
    the flag removed. Some drivers still do not implement the startup
    sequence at all and will need to be tested with it enabled.

    Signed-off-by: Jason Gunthorpe
    Tested-by: Andrew Zamansky
    Reviewed-by: Jarkko Sakkinen
    Signed-off-by: Jarkko Sakkinen

    Jason Gunthorpe
     

19 Oct, 2015

1 commit

  • 954650efb   tpm: seal/unseal for TPM 2.0 ... Browse Code »

    Added tpm_trusted_seal() and tpm_trusted_unseal() API for sealing
    trusted keys.

    This patch implements basic sealing and unsealing functionality for
    TPM 2.0:

    * Seal with a parent key using a 20 byte auth value.
    * Unseal with a parent key using a 20 byte auth value.

    Signed-off-by: Jarkko Sakkinen
    Signed-off-by: Peter Huewe

    Jarkko Sakkinen
     

30 Jul, 2014

1 commit

  • 8e54caf40   tpm: Provide a generic means to override the chip returned timeouts ... Browse Code »

    Some Atmel TPMs provide completely wrong timeouts from their
    TPM_CAP_PROP_TIS_TIMEOUT query. This patch detects that and returns
    new correct values via a DID/VID table in the TIS driver.

    Tested on ARM using an AT97SC3204T FW version 37.16

    Cc:
    [PHuewe: without this fix these 'broken' Atmel TPMs won't function on
    older kernels]
    Signed-off-by: "Berg, Christopher"
    Signed-off-by: Jason Gunthorpe

    Signed-off-by: Peter Huewe

    Jason Gunthorpe
     

06 Jan, 2014

1 commit

  • 01ad1fa75   tpm: Create a tpm_class_ops structure and use it in the drivers ... Browse Code »

    This replaces the static initialization of a tpm_vendor_specific
    structure in the drivers with the standard Linux idiom of providing
    a const structure of function pointers.

    Signed-off-by: Jason Gunthorpe
    Reviewed-by: Joel Schopp
    Reviewed-by: Ashley Lai
    [phuewe: did apply manually due to commit
    191ffc6bde3 tpm/tpm_i2c_atmel: fix coccinelle warnings]
    Signed-off-by: Peter Huewe

    Jason Gunthorpe
     

22 May, 2013

1 commit

23 Aug, 2012

1 commit

  • 41ab999c8   tpm: Move tpm_get_random api into the TPM device driver ... Browse Code »

    Move the tpm_get_random api from the trusted keys code into the TPM
    device driver itself so that other callers can make use of it. Also,
    change the api slightly so that the number of bytes read is returned in
    the call, since the TPM command can potentially return fewer bytes than
    requested.

    Acked-by: David Safford
    Reviewed-by: H. Peter Anvin
    Signed-off-by: Kent Yoder

    Kent Yoder
     

29 Nov, 2010

1 commit

  • c749ba912   key: add tpm_send command ... Browse Code »

    Add internal kernel tpm_send() command used to seal/unseal keys.

    Changelog:
    - replaced module_put in tpm_send() with new tpm_chip_put() wrapper
    (suggested by David Howells)
    - Make tpm_send() cmd argument a 'void *' (suggested by David Howells)

    Signed-off-by: David Safford
    Signed-off-by: Mimi Zohar
    Acked-by: David Howells
    Acked-by: Serge E. Hallyn
    Signed-off-by: James Morris

    Mimi Zohar
     

29 Oct, 2009

1 commit

  • ff76ec18c   tpm: fix header for modular build ... Browse Code »

    Fix build for TCG_TPM=m. Header file doesn't handle this
    and incorrectly builds stubs.

    drivers/char/tpm/tpm.c:720: error: redefinition of 'tpm_pcr_read'
    include/linux/tpm.h:35: error:previous definition of 'tpm_pcr_read' was here
    drivers/char/tpm/tpm.c:752: error: redefinition of 'tpm_pcr_extend'
    include/linux/tpm.h:38: error:previous definition of 'tpm_pcr_extend' was here

    Repairs linux-next's

    commit d6ba452128178091dab7a04d54f7e66fdc32fb39
    Author: Mimi Zohar
    Date: Mon Oct 26 09:26:18 2009 -0400

    tpm add default function definitions

    Signed-off-by: Randy Dunlap
    Cc: Rajiv Andrade
    Cc: Mimi Zohar
    Cc: James Morris
    Cc: Eric Paris
    Signed-off-by: Andrew Morton
    Signed-off-by: James Morris

    Randy Dunlap
     

28 Oct, 2009

1 commit

03 Feb, 2009

1 commit

  • 659aaf2bb   TPM: integrity interface ... Browse Code »

    This patch adds internal kernel support for:
    - reading/extending a pcr value
    - looking up the tpm_chip for a given chip number

    Signed-off-by: Rajiv Andrade
    Signed-off-by: Mimi Zohar
    Signed-off-by: James Morris

    Rajiv Andrade