Re: [Xen-ia64-devel] Faulty protection key handling

[Tristan Gingold <tgingold@xxxxxxx>]

> For PV this is not completely true. If an OS uses PKRs, it has the same
> problem as the hypervisor: one PKR with a specific value must always be loaded
> for interrupt handling. I would see no problem to use the same PKR and PK
> value as the hypervisor (PKR 0 with PK value 0, rwx allowed).
> This would eliminate the restriction to 15 PKRs as well.
Using this mechanism if fine for PV and should be very easy to implement.

But this implementation can't be merged with VTI.  This is a drawback, although
being acceptable IMHO.

Tristan.

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