Re: [PATCH v6 15/20] KVM: x86: Guard valid XCR0.APX settings

[Christian Ludloff]

> In the non-compacted XSAVE format, APX and MPX conflict on the same
> offset. Although MPX is being deprecated in practice, KVM should
> explicitly reject such configurations that set both bits.

The ISA does not preclude an implementation that
supports both MPX and APX simultaneously.

Properly written SW deals with that possibility...  :)

--
C.