Re: unusual uefi call/mapping problem

[Joel Schopp <jschopp-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>]

Thanks for the quick reply.

>> I'm working on the Linux kernel implementation of an draft standard
>> that has a uefi component.
>
> What standard would that be?

Trusted Computing Group Dynamic Root of Trust Management (D-RTM).


>> After extracting the physical address of the UEFI service we can't
>> successfully map it or call it.
>
> You want to call it from the kernel?  Why?  Usually you get a "virtual"
> address to call UEFI things, and then use efi_call_virt?(), why can't
> you do that here as well?

If I had a virtual address I would be a happy man.  I have a physical 
address and my attempts to turn it into a virtual one that is callable 
have been unfruitful.


>> 2) Various methods to map in the physical address into virtual
>> address space and then call the virtual address.  All of these have
>> failed.
>
> Why?  What have you done that failed?  Any pointers to code anywhere?

Unfortunately I can't release code until after the spec is public.  I 
believe that will happen in a matter of weeks and not months.  Then all 
work will be shared under gpl and we will work on getting it functional 
and acceptable for upstream inclusion.  I realize not being able to post 
code now is very limiting.

>
> Are you trying to do this before we switch to virtual mode, or after?

After.  We are trying to do this well after all userspace has started.