From: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> This patchset is to add Hyper-V direct tlb support in KVM. Hyper-V in L0 can delegate L1 hypervisor to handle tlb flush request from L2 guest when direct tlb flush is enabled in L1. Patch 2 introduces new cap KVM_CAP_HYPERV_DIRECT_TLBFLUSH to enable feature from user space. User space should enable this feature only when Hyper-V hypervisor capability is exposed to guest and KVM profile is hided. There is a parameter conflict between KVM and Hyper-V hypercall. We hope L2 guest doesn't use KVM hypercall when the feature is enabled. Detail please see comment of new API "KVM_CAP_HYPERV_DIRECT_TLBFLUSH" Change since v3: - Update changelog in each patches. Change since v2: - Move hv assist page(hv_pa_pg) from struct kvm to struct kvm_hv. Change since v1: - Fix offset issue in the patch 1. - Update description of KVM KVM_CAP_HYPERV_DIRECT_TLBFLUSH. Tianyu Lan (2): x86/Hyper-V: Fix definition of struct hv_vp_assist_page KVM/Hyper-V: Add new KVM capability KVM_CAP_HYPERV_DIRECT_TLBFLUSH Vitaly Kuznetsov (1): KVM/Hyper-V/VMX: Add direct tlb flush support Documentation/virtual/kvm/api.txt | 13 +++++++++++++ arch/x86/include/asm/hyperv-tlfs.h | 24 ++++++++++++++++++----- arch/x86/include/asm/kvm_host.h | 4 ++++ arch/x86/kvm/vmx/evmcs.h | 2 ++ arch/x86/kvm/vmx/vmx.c | 39 ++++++++++++++++++++++++++++++++++++++ arch/x86/kvm/x86.c | 8 ++++++++ include/uapi/linux/kvm.h | 1 + 7 files changed, 86 insertions(+), 5 deletions(-) -- 2.14.5