[SRU][Artful][Bionic][PATCH 0/1] kvm: vmx: Reinstate support for CPUs without virtual NMI

[Joseph Salisbury]

BugLink: http://bugs.launchpad.net/bugs/1741655

== SRU Justification ==
The following mainline commit introduced a regression in v4.12-rc1:
2c82878b0cb3 ("KVM: VMX: require virtual NMI support")

This regression caused the kvm-intel module fail to load with the following error:
"modprobe: ERROR: could not insert 'kvm_intel': Input/output error"

This error would happen because support for CPUs without virtual NMI was removed
by commit 2c82878b0cb3.

Mainline commit 8a1b43922d0d fixes this regression and was added to mainline in v4.15-rc1.
    

== Fix ==
commit 8a1b43922d0d1279e7936ba85c4c2a870403c95f
Author: Paolo Bonzini <pbonzini at redhat.com>
Date:   Mon Nov 6 13:31:12 2017 +0100

    kvm: vmx: Reinstate support for CPUs without virtual NMI

== Regression Potential ==
Low.  This patch fixes a current regression.  It was cc'd to upstream stable
so had additional upstream review.

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

Paolo Bonzini (1):
  kvm: vmx: Reinstate support for CPUs without virtual NMI

 arch/x86/kvm/vmx.c | 150 +++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 106 insertions(+), 44 deletions(-)

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2.7.4