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Linus Torvalds 84d4e8b613 Hi,
Round #2.
 
 O_EXCL patches will be postponed to 6.19 as they need some restructuring.
 E.g., there's in-between series regression breaking the user space as lack
 of O_EXCL flag handling causes obviously unconditional O_EXCL.
 
 As per Chris' feedback, commands fail because it is based on Google's a
 non-standard proprietary TPM alike implementation. And the issue is not
 PC Client Profile specific. "typical profiles" are fine when they become
 "typical profiles".
 
 The null key can be verified with vendor certificate tied keys, and there's
 challenge-response process using them for certifying any other key by a
 remote party.
 
 Performance hit on generation aside, if really starting to cut hairs null
 keys are the most secure option, and it's a non-debatable fact: they have
 shortest expiration times as seed changes per power cycle.
 
 Based on this TCG_TPM2_HMAC is disabled from defconfig exactly for the sake
 of the performance issues.
 
 BR, Jarkko
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Merge tag 'tpmdd-next-v6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

Pull tpm updates from Jarkko Sakkinen:

 - Disable TCG_TPM2_HMAC from defconfig

   It causes performance issues, and breaks some atypical
   configurations.

 - simplify code using the new crypto library

 - misc fixes and cleanups

* tag 'tpmdd-next-v6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd:
  tpm: Prevent local DOS via tpm/tpm0/ppi/*operations
  tpm: use a map for tpm2_calc_ordinal_duration()
  tpm_tis: Fix incorrect arguments in tpm_tis_probe_irq_single
  tpm: Use HMAC-SHA256 library instead of open-coded HMAC
  tpm: Compare HMAC values in constant time
  tpm: Disable TPM2_TCG_HMAC by default
2025-10-10 08:34:11 -07:00
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MAINTAINERS perf tools improvements and fixes for Linux v6.18: 2025-10-08 19:24:24 -07:00
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.