Linus once said that debuggers are for sissies. I knew he would regret saying that sometime.
Here is another of his rants against debuggers. Just substitute 'kernel debugger' by 'simple chipset debugging facilities' (whatever that means) in that email and basically he has his response for why Intel isn't adding it. http://linuxmafia.com/faq/Kernel/linus-im-a-bastard-speech.h...
Intel engineers are saying, 'simple chipset debugging facilities' are for sissies!