Re: [RFC v3][PATCH 2/2] intel_txt: Intel(R) TXT and tboot kernel support

[Andi Kleen]

> > > > +   ((void(*)(void))(long)tboot_shared->shutdown_entry)();
> 
> be better? Or is shutdown_entry always mapped into [0..2GB) on 

0..4GB and this code runs in a identity mapping.

> 64-bit? Even then, not sign-extending RIP addresses is wrong and 
> invites bugs/restrictions.

You never have to sign extend when going from 32bit to 64bit
on x86-64.

-andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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