rcutorture: Add KVM-based test framework

This commit adds the test framework that I used to test RCU under KVM.
This consists of a group of scripts and Kconfig fragments.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Greg KH <gregkh@linuxfoundation.org>

diff --cc MAINTAINERS
Simple merge

diff --cc tools/testing/selftests/rcutorture/.gitignore
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/config2frag.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/configNR_CPUS.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/configcheck.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/configinit.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/cpus2use.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/functions.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/kvm-build.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/kvm-recheck.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/kvm-test-1-rcu.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/kvm.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/parse-build.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/parse-console.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/bin/parse-rcutorture.sh
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N1-S-T-NH-SD-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N2-2-t-nh-sd-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N3-3-T-nh-SD-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N4-A-t-NH-sd-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N5-U-T-NH-sd-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N6---t-nh-SD-smp-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N7-4-T-NH-SD-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/N8-2-T-NH-SD-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/NT1-nh
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/NT3-NH
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P1-S-T-NH-SD-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P2-2-t-nh-sd-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P3-3-T-nh-SD-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P4-A-t-NH-sd-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P5-U-T-NH-sd-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P6---t-nh-SD-smp-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P7-4-T-NH-SD-SMP-HP
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P7-4-T-NH-SD-SMP-HP-all
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P7-4-T-NH-SD-SMP-HP-none
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/P7-4-T-NH-SD-SMP-hp
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/PT1-nh
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/PT2-NH
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/sysidleN.2013.06.19a
Simple merge

diff --cc tools/testing/selftests/rcutorture/configs/sysidleY.2013.06.19a
Simple merge

diff --cc tools/testing/selftests/rcutorture/doc/initrd.txt
Simple merge

diff --cc tools/testing/selftests/rcutorture/doc/rcu-test-image.txt
Simple merge