Hyper-V advertises support for the Extended Destination ID standard via
bit 2 of the value returned in the EAX register when the hypervisor
stack properties are queried via CPUID.
This is based on a commit to the Linux kernel, as there does not seem
to be any other documentation of this feature.
Reviewed by: Souradeep Chakrabarti
MFC after: 3 weeks
Sponsored by: Amazon
Differential Revision: https://reviews.freebsd.org/D55432
(cherry picked from commit 7b6be0014a4eb81943491122bae70914b7fd82b6)
c7d6c74fb8