vmx_instruction_intercept test in kvm-unit-test failed on E4v3 azure node with 4.13/4.14 kernel

[Po-Hsu Lin]

With Joshua's comment in bug 1719524: "Nested KVM can only be tried on instance sizes with nested Hypervisor support: Ev3 and Dv3.", although the instance name is E4v3 here but I can start a KVM on it.

Test vmx_instruction_intercept test will fail on it.

Steps:
1. git clone --depth=1 https://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git
2. cd kvm-unit-tests; ./configure; make
3. Run the vmx_instruction_intercept test as root:

# TESTNAME=vmx_instruction_intercept TIMEOUT=90s ACCEL= ./x86/run x86/vmx.flat -smp 1 -cpu host,+vmx -append instruction_intercept
timeout -k 1s --foreground 90s /usr/bin/qemu-system-x86_64 -nodefaults -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -vnc none -serial stdio -device pci-testdev -machine accel=kvm -kernel x86/vmx.flat -smp 1 -cpu host,+vmx -append instruction_intercept # -initrd /tmp/tmp.w6ySLIhh8e
enabling apic
paging enabled
cr0 = 80010011
cr3 = 46b000
cr4 = 20

Test suite: instruction intercept
PASS: execute HLT
PASS: intercept HLT
PASS: execute INVLPG
PASS: intercept INVLPG
PASS: execute MWAIT
PASS: intercept MWAIT
Unhandled exception 13 #GP at ip 00000000004039d5
error_code=0000 rflags=00010046 cs=00000008
rax=0000000000000000 rcx=0000000000000000 rdx=00000000004039d3 rbx=000000000041bcfa
rbp=0000000000472fdf rsi=0000000000000000 rdi=0000000000000006
 r8=000000000041cf72 r9=00000000000003f8 r10=0000000000000000 r11=0000000000000000
r12=0000000000000000 r13=0000000000000000 r14=0000000000000000 r15=0000000000000000
cr0=0000000080010031 cr2=0000000000000000 cr3=000000000046b000 cr4=0000000000002020
cr8=0000000000000000
 STACK: @4039d5 401eb6 4004dd

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.14.0-1004-azure-edge 4.14.0-1004.4
ProcVersionSignature: User Name 4.14.0-1004.4-username-edge 4.14.14
Uname: Linux 4.14.0-1004-azure-edge x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
Date: Thu Feb 8 06:20:16 2018
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: linux-azure-edge
UpgradeStatus: No upgrade log present (probably fresh install)