Merge remote-tracking branch 'remotes/ehabkost/tags/x86-next-pull-request' into staging

x86 queue, 2019-01-14

* Reenable RDTSCP support on Opteron_G[345] CPU models CPU models
  (Borislav Petkov)
* host-phys-bits-limit option for better control of 5-level EPT
  (Eduardo Habkost)
* Disable MPX support on named CPU models (Paolo Bonzini)
* expose HV_CPUID_ENLIGHTMENT_INFO.EAX and HV_CPUID_NESTED_FEATURES.EAX
  as feature words (Vitaly Kuznetsov)

# gpg: Signature made Mon 14 Jan 2019 14:33:55 GMT
# gpg:                using RSA key 2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <[email protected]>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-next-pull-request:
  i386/kvm: add a comment explaining why .feat_names are commented out for Hyper-V feature bits
  x86: host-phys-bits-limit option
  target/i386: Disable MPX support on named CPU models
  target-i386: Reenable RDTSCP support on Opteron_G[345] CPU models CPU models
  i386/kvm: expose HV_CPUID_ENLIGHTMENT_INFO.EAX and HV_CPUID_NESTED_FEATURES.EAX as feature words

Signed-off-by: Peter Maydell <[email protected]>