On Sun, Jun 06, 2021 at 08:22:14PM +0300, Nick Kossifidis wrote: > This patch violates the Privilege Spec section 4.4.1 that clearly states: > > "Bits63–54 are reserved for future standard use and must be zeroed by > software for forward compatibility" > > Standard use means that valid values can only be defined by the Priv. Spec, > not by the vendor (otherwise they'd be marked as "custom use" or "platform > use"), and since they "must" be zeroed by software we 'll be violating the > Privilege Spec if we do otherwise. Yes, that is why I think it is a no-go.
