[Cosmic][v2][PATCH 0/3] Fixes for lp1788563

[Joseph Salisbury]

BugLink: https://bugs.launchpad.net/bugs/1788563

== SRU Justification ==
This bug has been reported in multiple bugs and affects Trusty,
Xenial and Bionic.  All releases need different backports, so T and X
will be sent in separate SRU requests.

Due to this bug in the original L1TF patch set, L1TF mitigation not
effective in certain CPU and installed RAM configurations.

== Fixes ==
9df9516940a6 ("x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit")
b0a182f87568 ("x86/speculation/l1tf: Fix off-by-one error when warning that system has too much RAM")
cc51e5428ea5 ("x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+")

== Regression Potential ==
Low.  These are security fixes and have all been cc'd to upstream
stable, so they have had additional upstream review.

== Test Case ==
A test kernel was built with these patches and tested by the original bug reporter.
The bug reporter states the test kernel resolved the bug.


Andi Kleen (1):
  x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+

Vlastimil Babka (2):
  x86/speculation/l1tf: Fix overflow in l1tf_pfn_limit() on 32bit
  x86/speculation/l1tf: Fix off-by-one error when warning that system
    has too much RAM

 arch/x86/include/asm/processor.h |  6 ++++--
 arch/x86/kernel/cpu/bugs.c       | 46 +++++++++++++++++++++++++++++++++++-----
 arch/x86/kernel/cpu/common.c     |  3 +++
 arch/x86/mm/init.c               |  4 ++--
 arch/x86/mm/mmap.c               |  2 +-
 5 files changed, 51 insertions(+), 10 deletions(-)

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2.7.4