[SRU][Xenial][PATCH 0/3] Fixes for LP:1788563

[Tyler Hicks]

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

== SRU Justification ==
This regression has been reported in multiple bugs and affects Trusty,
Xenial and Bionic.  All releases need different backports. jsalisbury
will provide the backports for Bionic.

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.

Tyler