nVMX x86: Enforce NMI controls on vmentry of L2 and add a corresponding unit test (v2)

[Krish Sadhukhan <krish.sadhukhan@xxxxxxxxxx>]

This is v2 of the patches sent out earlier. Based on Jim Mattson's comments on
v1, I have made the following changes in patch# 2:

	i) Separate the check for "NMI-window exiting" so that the sub-tests
	   for PIN_NMI and PIN_VIRT_NMI can execute even if "NMI-window exiting"
	   is not supported by the platform.
	ii) Keep the user-visible strings on one line.


[PATCH nVMX 1/2] x86: Enforce NMI controls on vmentry of L2 guests
[PATCH nVMX TEST 2/2] x86: Add test for checking NMI controls on vmentry of L2

 arch/x86/kvm/vmx.c | 29 +++++++++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

Krish Sadhukhan (1):
      x86: Enforce NMI controls on vmentry of L2 guests

 x86/vmx_tests.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

Krish Sadhukhan (1):
      x86: Add test for checking NMI controls on vmentry of L2 guests