tsvm-isvtenabled

#!/bin/bash
# Copyright (C) 2014 Life Technologies Inc. All Rights Reserved
#=======================================================================
# Check for BIOS virtualization enabled
# http://www.redhat.com/archives/libvir-list/2007-March/msg00218.html
#=======================================================================
if [[ $(id -u) != 0 ]]; then
    echo -n 'Error' >&1
    echo "Programming error:" >&2
    echo "Needs to be executed with super user privilege" >&2
    exit
fi

modprobe msr || true
result=$(/usr/sbin/rdmsr 0x3A 2>&1)
# In detail, the register is the IA32_FEATURE_CONTROL (0x3A) MSR. The relevant bits are:
#  bit 0   Lock bit (0 = unlocked, 1 = permanently locked)
#  bit 1   Enable VMXON in Intel Safer Mode Extensions (SMX)
#  bit 2   Enable VMXON in normal operation
# Mask bit 2
result_int=$((0x$result))
is_set=$(( $result_int & 4 ? 1 : 0 ))

if [[ $is_set == 1 ]]; then
    #This is happy path; virtualization enabled
    echo -n "" >&1
else
    echo -n "BIOS Disabled" >&1 # Do not edit the stdout return string
    echo "KVM (vmx) is disabled by your BIOS" >&2
    echo "Enter your BIOS setup and enable Virtualization Technology (VT)" >&2
    echo -n "and then hard poweroff/poweron your system" >&2
    exit 1
fi


#=======================================================================
# Check if kvm modules are running.  If so, virtualbox will not run
# Note: this is not expected on Torrent Servers.  It likely means qemu
# has been installed manually.
#=======================================================================
if lsmod|grep -q kvm_intel; then
    echo -n "BIOS Disabled" >&1 # Do not edit the stdout return string
    echo "WARNING: kvm_intel module is running" >&2
    echo "This will prevent virtualbox from starting a VM" >&2
    echo "To enable virtualbox, run the following:" >&2
    echo " sudo rmmod kvm kvm_intel" >&2
    exit 1
fi

exit

#if [ $((0x$result)) -eq 5 ] 2>/dev/null; then
#    #This is happy path; BIOS enabled
#    echo -n ${STATES[$STATE]} >&1
#elif [ $((0x$result)) -eq $(($result)) ] 2>/dev/null; then
#    # result is an integer; thus not an error string
#    #STATE=7
#    echo -n "BIOS Disabled ($result)" >&1
#    echo "KVM (vmx) is disabled by your BIOS" >&2
#    echo "Enter your BIOS setup and enable Virtualization Technology (VT)" >&2
#    echo -n "and then hard poweroff/poweron your system" >&2
#    exit 1
#else
#    # result is an error string and we dump it; hoping it helps
#    #STATE=9
#    echo -n 'Error' >&1
#    echo "Programming error:" >&2
#    echo $result >&2
#    echo "error in "$(readlink -f $0) >&2
#    exit 1
#fi