[SRU][Trusty][PATCH 0/3] Cleanups for CVE-2017-5715 (Spectre v2)

[Juerg Haefliger]

This is the second round of IBPB/IBRS runtime control cleanups for Trusty.
With this, Trusty matches Xenial. The introduced fuctional changes are:
 - Write every IBPB and IBRS state change to the kernel log.
 - Return an error if the user tries to enable IBRS or IBPB on HW that
   doesn't support it.
 - Expose the IBRS state through sysfs.

Compile-tested all architectures.

Signed-off-by: Juerg Haefliger <juergh at canonical.com>


Juerg Haefliger (3):
  UBUNTU: SAUCE: x86/speculation: Cleanup IBPB runtime control handling
    (v2)
  UBUNTU: SAUCE: x86/speculation: Cleanup IBRS runtime control handling
    (v2)
  UBUNTU: SAUCE: x86/speculation: Move RSB_CTXSW hunk

 arch/x86/include/asm/nospec-branch.h | 12 +++--
 arch/x86/include/asm/spec_ctrl.h     |  3 ++
 arch/x86/kernel/acpi/cstate.c        |  4 +-
 arch/x86/kernel/cpu/bugs.c           | 69 ++++++++++++++--------------
 arch/x86/kernel/process.c            |  6 +--
 arch/x86/kernel/smpboot.c            |  4 +-
 kernel/sysctl.c                      | 61 ++++++++++++++----------
 7 files changed, 88 insertions(+), 71 deletions(-)

-- 
2.19.1