kvm_vm.py: add new VM parameter 'x11_display' that controls $DISPLAY

If x11_display is specified, the DISPLAY environment variable
is set to this value for the QEMU process. This may be useful
for SDL rendering. Also add some comments.

Signed-off-by: Michael Goldish <mgoldish@redhat.com>


git-svn-id: http://test.kernel.org/svn/autotest/trunk@3247 592f7852-d20e-0410-864c-8624ca9c26a4
1 file changed