RE: [Xen-ia64-devel] domU address space

[Kouya Shimura <kouya@xxxxxxxxxxxxxx>]

tgingold@xxxxxxx writes:
> > Do we have checks when inserting guest TLB for PV dom? Seems not,
> 
> Yes, we do.  See vcpu.c:check_xen_space_overlap

It's only for xen area (region 7).  domU can use full 60 bit VA on
other region in spite of IMPL_VA_MSB = 50.

Eddie,
Ideally we should check it. 
But current xen implementation requires full 64bit VA and there is no
such an Itanium2 with IMPL_VA_MSB <60. (except VTi)
So mis-using TLB cannot be. (i.e. unimplemented VA fault never be
happened)

If we support xen on xen, it should be fixed in order to prevent
a guest xen crashing. :)

Thanks,
Kouya

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