[PATCH 0/5] KVM: nVMX: Enlightened VMCS for Hyper-V on KVM

Vitaly Kuznetsov
2018-06-14T08:25:13Z

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).

Changes since RFCv2:
- Rename sync_shadow_vmcs to need_vmcs12_sync and reuse for eVMCS case
[Paolo Bonzini]

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

Vitaly Kuznetsov (4):
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

arch/x86/include/asm/kvm_host.h | 3 +
arch/x86/kvm/hyperv.c | 23 +-
arch/x86/kvm/hyperv.h | 4 +
arch/x86/kvm/lapic.c | 4 +-
arch/x86/kvm/lapic.h | 2 +-
arch/x86/kvm/svm.c | 9 +
arch/x86/kvm/vmx.c | 810 +++++++++++++++++++++++++++++++++-------
arch/x86/kvm/x86.c | 17 +-
include/uapi/linux/kvm.h | 1 +
9 files changed, 724 insertions(+), 149 deletions(-)

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2.14.4