Re: [PATCH] KVM: X86: Fix the decoding of segment overrides in 64bit mode

[Paolo Bonzini]

On 22/03/2018 12:04, Andrew Cooper wrote:
> We've got a Force Emulation Prefix (ud2a; .ascii "xen") for doing
> magic. Originally, this was used for PV guests to explicitly request an
> emulated CPUID, but I extended it to HVM guests for "emulate the next
> instruction", after we had some guest user => guest kernel privilege
> escalations because of incorrect emulation.

Wanpeng, why don't you add it behind a new kvm module parameter? :)

Paolo