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Subject[PATCH V2 0/3] KVM/Hyper-V: Add Hyper-V direct tlb flush support
Date
From: Tianyu Lan <Tianyu.Lan@microsoft.com>

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 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 cap KVM_CAP_HYPERV_DIRECT_TLBFLUSH

Vitaly Kuznetsov (1):
KVM/Hyper-V/VMX: Add direct tlb flush support

Documentation/virtual/kvm/api.txt | 12 ++++++++++++
arch/x86/include/asm/hyperv-tlfs.h | 24 +++++++++++++++++++-----
arch/x86/include/asm/kvm_host.h | 2 ++
arch/x86/kvm/vmx/evmcs.h | 2 ++
arch/x86/kvm/vmx/vmx.c | 38 ++++++++++++++++++++++++++++++++++++++
arch/x86/kvm/x86.c | 8 ++++++++
include/linux/kvm_host.h | 1 +
include/uapi/linux/kvm.h | 1 +
8 files changed, 83 insertions(+), 5 deletions(-)

--
2.14.5

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