mbox series

[0/3] KVM/Hyper-V: Add Hyper-V direct tlb flush support

Message ID 20190809094939.76093-1-Tianyu.Lan@microsoft.com (mailing list archive)
Headers show
Series KVM/Hyper-V: Add Hyper-V direct tlb flush support | expand

Message

Tianyu Lan Aug. 9, 2019, 9:49 a.m. UTC 
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"

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  | 10 ++++++++++
 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, 81 insertions(+), 5 deletions(-)