On Thu, Jun 27, 2013 at 08:09:50AM -0700, James Bottomley wrote:

On Thu, 2013-06-27 at 15:37 +0100, Matthew Garrett wrote:

quoted

And yet it's the only mode in which the firmrware is actually tested 
against an OS, so we don't have any real choice in the matter.

Agree for x86 ... we just have to cope with the implementations we see
in the field.  However, ARM has much more scope to have the UEFI
implementation developed collaboratively with Linux as the reference
platform.  If we can convince the ARM implementors that
SetVirtualAddressMap is an accident waiting to happen, they might be
more flexible.

The majority of existing ARM UEFI implementations have only ever been 
used to boot Windows, so like I said, this really isn't a safe 
assumption.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org