lkml.org 
[lkml]   [2014]   [Dec]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [PATCH v8 0/8] TPM 2.0 support
Date
Am Dienstag, 2. Dezember 2014, 23:31:12 schrieb Jarkko Sakkinen:
> This patch set enables TPM2 protocol and provides drivers for FIFO and
> CRB interfaces. This patch set does not export any sysfs attributes for
> TPM 2.0 because existing sysfs attributes have three non-trivial issues:
>
> - They are associated with the platform device instead of character
> device.
> - They are are not trivial key-value pairs but contain text that is
> not easily parsed by a computer.
> - Raciness as described in
>
> http://kroah.com/log/blog/2013/06/26/how-to-create-a-sysfs-file-correctly/
>
> This is too big effort to be included into this patch set and requires
> more discussion.
>
> v2:
> - Improved struct tpm_chip life-cycle by taking advantage of devres
> API.
> - Refined sysfs attributes as simple key-values thereby not repeating
> mistakes in TPM1 sysfs attributes.
> - Documented functions in tpm-chip.c and tpm2-cmd.c.
> - Documented sysfs attributes.
>
> v3:
> - Lots of fixes in calling order in device drivers (thanks to Jason
> Gunthorpe for pointing these out!).
> - Attach sysfs attributes to the misc device because it represents
> TPM device to the user space.
>
> v4:
> - Disable sysfs attibutes for TPM 2.0 for until we can sort out the
> best approach for them.
> - Fixed all the style issues found with checkpatch.pl.
>
> v5:
> - missing EXPORT_SYMBOL_GPL()
> - own class for TPM devices used for TPM 2.0 devices and onwards.
>
> v6:
> - Non-racy initialization for sysfs attributes using struct device's
> groups field.
> - The class 'tpm' is used now for all TPM devices. For the first device
> node major MISC_MAJOR and minor TPM_MINOR is used in order to retain
> backwards compatability.
>
> v7:
> - Release device number and free struct tpm_chip memory inside
> tpm_dev_release callback.
> - Moved code from tpm-interface.c and tpm_dev.c to tpm-chip.c.
>
> v8:
> - Cleaned up unneeded cast from tpm_transmit_cmd().
> - Cleaned up redundant PPI_VERSION_LEN constant from tpm_ppi.c.
> - Fixed tpm_tis to use tpm2_calc_ordinal_duration() for TPM2 devices.
> - tpm_crb: in crb_recv, check that count can hold the TPM header at
> minimum.
> - tpm_crb: add enumerations for bit flags in start and cancel fields
> of the control area.
> - tpm_crb: use ioremap() for command and response buffer because
> they might be anywhere.
> - tpm_crb: use IO access functions for reading ioremapped buffers
> because using direct pointers is not portable.
> - tpm_crb: only apply ACPI start if start method reported by the
> TPM2 ACPI table allows it.
> - In tpm2_pcr_read() just calculate index and bit and get rid of
> hacky loop.
> - Do not add sysfs attributes for TPM 2.0 devices.
>
> Jarkko Sakkinen (7):
> tpm: merge duplicate transmit_cmd() functions
> tpm: two-phase chip management functions
> tpm: fix raciness of PPI interface lookup
> tpm: rename chip->dev to chip->pdev
> tpm: device class for tpm
> tpm: TPM 2.0 baseline support
> tpm: TPM 2.0 CRB Interface
>
> Will Arthur (1):
> tpm: TPM 2.0 FIFO Interface
>
> drivers/char/tpm/Kconfig | 9 +
> drivers/char/tpm/Makefile | 3 +-
> drivers/char/tpm/tpm-chip.c | 251 ++++++++++++++++
> drivers/char/tpm/tpm-dev.c | 42 +--
> drivers/char/tpm/tpm-interface.c | 261 ++++++----------
> drivers/char/tpm/tpm-sysfs.c | 29 +-
> drivers/char/tpm/tpm.h | 113 ++++++-
> drivers/char/tpm/tpm2-cmd.c | 571
> ++++++++++++++++++++++++++++++++++++ drivers/char/tpm/tpm_atmel.c |
> 25 +-
> drivers/char/tpm/tpm_crb.c | 356 ++++++++++++++++++++++
> drivers/char/tpm/tpm_i2c_atmel.c | 49 ++--
> drivers/char/tpm/tpm_i2c_infineon.c | 43 +--
> drivers/char/tpm/tpm_i2c_nuvoton.c | 68 ++---

When applying to linux-v3.18-rc6 I get this new coccinelle warning:
drivers/char/tpm/tpm_i2c_nuvoton.c:607:1-3: WARNING: end returns can be
simpified


make -C ../../../linux/ M=$(pwd) coccicheck

Peter


\
 
 \ /
  Last update: 2014-12-03 00:21    [W:0.156 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site