cvs commit: src/sys/amd64/amd64 mp_machdep.c src/sys/i386/i386 mp_machdep.c

[Colin Percival]

cperciva    2007-11-08 19:45:20 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_7)
    sys/amd64/amd64      mp_machdep.c 
    sys/i386/i386        mp_machdep.c 
  Log:
  Change the default for hyperthreading (or, generally speaking, cases
  where the L1 cache is shared between CPUs) to disabled for security
  reasons.  As in earlier releases, this can be changed by setting
  machdep.hyperthreading_allowed=1 in /boot/loader.conf.
  
  This is not an MFC -- no seatbelts in CURRENT.
  
  Approved by:    re (kensmith)
  Security:       See FreeBSD-SA-05:09.htt for background material.
  
  Revision   Changes    Path
  1.287.2.1  +1 -1      src/sys/amd64/amd64/mp_machdep.c
  1.281.2.1  +1 -1      src/sys/i386/i386/mp_machdep.c