[Xen-ia64-devel] Uncached offset: Region 6 -> lower half of VTi-reserved VM space

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

I've just pushed a patch to xeno-unstable-ia64.bk which finishes
the virtual address changes submitted by Intel (Kevin, I think)
some months ago, where the Xen-reserved VA space was changed from
        0xf000000000000000-0xf7ffffffffffffff
                to
        0xe800000000000000-0xf7ffffffffffffff
to correspond to one less bit in the guest's virtual address
space.

The "uncached" portion of Xen's virtual address space was
still mapped at 0xd000000000000000.  I have moved it
to 0xe800000000000000 to properly correspond with the
one-less-bit-guest-VA space.

A couple of changes were required in ivt.S so corresponding
changes need to be made in vmx_ivt.S.  The only other change
was the constant value in io.h (a patched file) for
__IA64_UNCACHED_OFFSET.

Note that I also cleaned up a test to ensure that guest
data accesses are properly checked against the legal
address range.  (Not a problem on VTI as these addresses
could never be generated.)

See changeset 1.1711.  If someone at Intel could submit
the corresponding vmx_ivt.S change, I would appreciate it.

Thanks,
Dan

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