Re: [RFC][PATCH 0a/3] TXT: Intel(R) Trusted Execution Technologysupport for Linux - Overview

[Pavel Machek]

On Thu 2008-10-09 10:44:27, Chris Wright wrote:
> * Pavel Machek (pavel@xxxxxxx) wrote:
> > Ok, I don't get it, why would I want to measure my kernel?
> 
> Trusted boot.  There's always the double-edge sword w/ this.  Clearly,
> a requirement is that you don't just brick your own box, and have some
> policy/mechanism for defining how you'd use trusted boot.  I believe
> that's all there w/ TXT patch (since it's mostly handled before kernel
> boots, TXT kernel bit is just to help w/ handoff).

I have never used trusted boot and I'm not sure I want to. Why would I
want to do that?

> > I see why Disney would want to do that, but I don't see why we would
> > want to help them.
> > 
> > Plus, the fact that trusted mode is pretty much incompatible with
> > s3/s4 makes it useless, right?
> 
> Why do you say that?  Did you look at patch 3/3, see tboot_sleep().

You exit/reenter the trusted mode accross sleep... so any guarantees
"trusted" mode does are void, right?
								Pavel
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