how to test selinux

[bigclouds]

hi,all

how to test selinux.

in my case, qemu-kvm process has a MCS, how to confirm its authority is limited in this
MCS?

and check out  what kinds of authority this qemu-kvm process domain has?  the authority 
like  user shell(if it is exploited), how many dirs,files MCS can access, and read-write
perms?

thanks