1. 17 Nov, 2016 1 commit
  2. 24 Jun, 2016 1 commit
    • Stephan Mueller's avatar
      crypto: jitterentropy - use ktime_get_ns as fallback · b578456c
      Stephan Mueller authored
      As part of the Y2038 development, __getnstimeofday is not supposed to be
      used any more. It is now replaced with ktime_get_ns. The Jitter RNG uses
      the time stamp to measure the execution time of a given code path and
      tries to detect variations in the execution time. Therefore, the only
      requirement the Jitter RNG has, is a sufficient high resolution to
      detect these variations.
      
      The change was tested on x86 to show an identical behavior as RDTSC. The
      used test code simply measures the execution time of the heart of the
      RNG:
      
              jent_get_nstime(&time);
              jent_memaccess(ec, min);
              jent_fold_time(NULL, time, &folded, min);
              jent_get_nstime(&time2);
              return ((time2 - time));
      Signed-off-by: 's avatarStephan Mueller <smueller@chronox.de>
      Acked-by: 's avatarArnd Bergmann <arnd@arndb.de>
      Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
      b578456c
  3. 14 Oct, 2015 1 commit
  4. 28 Jul, 2015 1 commit
  5. 25 Jun, 2015 1 commit
    • Stephan Mueller's avatar
      crypto: jitterentropy - avoid compiler warnings · dfc9fa91
      Stephan Mueller authored
      The core of the Jitter RNG is intended to be compiled with -O0. To
      ensure that the Jitter RNG can be compiled on all architectures,
      separate out the RNG core into a stand-alone C file that can be compiled
      with -O0 which does not depend on any kernel include file.
      
      As no kernel includes can be used in the C file implementing the core
      RNG, any dependencies on kernel code must be extracted.
      
      A second file provides the link to the kernel and the kernel crypto API
      that can be compiled with the regular compile options of the kernel.
      Signed-off-by: 's avatarStephan Mueller <smueller@chronox.de>
      Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
      dfc9fa91