[PATCHv3 0/4] Add support for some HYPER-V PV features

[Gleb Natapov <gleb@redhat.com>]

HYPER-V provides PV capabilities for its guests and most new MS Windows
detect and use them automatically. Older Windows guests need additional
drivers to uses PV. This patch series implements some PV capabilities
defined by HYPER-V spec for KVM. Windows guests running on KVM will be
able to take advantage of them.

Changelog:
 v1->v2
  rename kvm_hyperv.h into hyperv.h and move into separate patch
  minor style fixes
  use clear_user-page(0 to zero userspace page
  use APIC register names when calling kvm_hv_vapic_msr_(read|write)()
 v2->v3
  fix msrs_to_save[] handling
  fix access to guests memory
  use kvm_read_cr0_bits() instead of direct access to cr0
 
Gleb Natapov (4):
  Add HYPE-V header file.
  Implement bare minimum of HYPER-V MSRs.
  Add HYPER-V apic access MSRs.
  Implement NotifyLongSpinWait HYPER-V hypercall.

 arch/x86/include/asm/hyperv.h   |  187 +++++++++++++++++++++++++++++++
 arch/x86/include/asm/kvm_host.h |    6 +
 arch/x86/include/asm/kvm_para.h |    1 +
 arch/x86/kvm/lapic.c            |   31 +++++
 arch/x86/kvm/lapic.h            |    8 ++
 arch/x86/kvm/trace.h            |   32 ++++++
 arch/x86/kvm/x86.c              |  232 ++++++++++++++++++++++++++++++++++++++-
 include/linux/kvm.h             |    3 +
 8 files changed, 499 insertions(+), 1 deletions(-)
 create mode 100644 arch/x86/include/asm/hyperv.h