[Xen-ia64-devel] Question to frametable_miss()

[Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxxxxxxx>]

Hi,

currently I'am looking at the code to bring in protection key support in xen 
and found the following lines in arch/ia64/xen/ivt.S within the  function
GLOBAL_ENTRY(frametable_miss)
....
mov r25=0x700|(PAGE_SHIFT<<2) // key=7
...
mov cr.itir=r25

What is the sense of the 0x700 ? Currently Xen doesn't use protection keys.
So why is this explicitly set here?
Many thanks for any hints!

Dietmar.

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