[v6,00/13] KVM: nVMX: Enlightened VMCS for Hyper-V on KVM

Message

Vitaly Kuznetsov Oct. 16, 2018, 4:49 p.m. UTC

Changes since v5:
- Rebase to kvm/queue.
- Add "KVM: selftests: state_test: test bare VMXON migration" patch.

Original description:

This is an initial implementation of Enlightened VMCS for nested Hyper-V on
KVM. Using it helps to spare 1500 cpu cycles for nested vmexit (tight cpuid
loop in WS2016 with Hyper-V role on KVM: 15200 cycles -> 13700 cycles).

Ladi Prosek (1):
  KVM: hyperv: define VP assist page helpers

Vitaly Kuznetsov (12):
  KVM: VMX: refactor evmcs_sanitize_exec_ctrls()
  KVM: nVMX: add KVM_CAP_HYPERV_ENLIGHTENED_VMCS capability
  KVM: nVMX: add enlightened VMCS state
  KVM: nVMX: implement enlightened VMPTRLD and VMCLEAR
  KVM: nVMX: optimize prepare_vmcs02{,_full} for Enlightened VMCS case
  x86/kvm/hyperv: don't clear VP assist pages on init
  x86/kvm/lapic: preserve gfn_to_hva_cache len on cache reinit
  x86/kvm/nVMX: allow bare VMXON state migration
  KVM: selftests: state_test: test bare VMXON migration
  x86/kvm/nVMX: nested state migration for Enlightened VMCS
  tools/headers: update kvm.h
  KVM: selftests: add Enlightened VMCS test

 arch/x86/include/asm/kvm_host.h               |    3 +
 arch/x86/include/uapi/asm/kvm.h               |    1 +
 arch/x86/kvm/hyperv.c                         |   31 +-
 arch/x86/kvm/hyperv.h                         |    4 +
 arch/x86/kvm/lapic.c                          |   14 +-
 arch/x86/kvm/lapic.h                          |    2 +-
 arch/x86/kvm/svm.c                            |    9 +
 arch/x86/kvm/vmx.c                            |  887 ++++++++++---
 arch/x86/kvm/x86.c                            |   23 +-
 include/uapi/linux/kvm.h                      |    1 +
 tools/include/uapi/linux/kvm.h                |    5 +
 tools/testing/selftests/kvm/Makefile          |    1 +
 tools/testing/selftests/kvm/include/evmcs.h   | 1098 +++++++++++++++++
 .../selftests/kvm/include/x86_64/vmx.h        |   29 +
 tools/testing/selftests/kvm/lib/x86_64/vmx.c  |   51 +-
 .../testing/selftests/kvm/x86_64/evmcs_test.c |  159 +++
 .../testing/selftests/kvm/x86_64/state_test.c |   22 +-
 .../kvm/x86_64/vmx_tsc_adjust_test.c          |    1 +
 18 files changed, 2159 insertions(+), 182 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/include/evmcs.h
 create mode 100644 tools/testing/selftests/kvm/x86_64/evmcs_test.c