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From:   Tianyu Lan <Tianyu.Lan@microsoft.com>
CC:     Tianyu Lan <Tianyu.Lan@microsoft.com>,
        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
        Haiyang Zhang <haiyangz@microsoft.com>,
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        "x86@kernel.org" <x86@kernel.org>,
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Subject: [RFC Patch 0/3] KVM/x86/hyper-V: Introduce PV guest address space
 mapping flush support  
Thread-Topic: [RFC Patch 0/3] KVM/x86/hyper-V: Introduce PV guest address
 space mapping flush support  
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Date:   Mon, 4 Jun 2018 09:08:09 +0000
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Hyper-V provides a para-virtualization hypercall HvFlushGuestPhysicalAddres=
sSpace
to flush nested VM address space mapping in l1 hypervisor and it's to reduc=
e overhead
of flushing ept tlb among vcpus. The tradition way is to send IPIs to all a=
ffected
vcpus and executes INVEPT on each vcpus. It will trigger several vmexits fo=
r IPI and
INVEPT emulation. The pv hypercall can help to flush specified ept table on=
 all vcpus
via one single hypercall.

Lan Tianyu (3):
  X86/Hyper-V: Add flush HvFlushGuestPhysicalAddressSpace hypercall
    support
  KVM: Add tlb remote flush callback in kvm_x86_ops.
  KVM/x86: Add tlb_remote_flush callback support for vmcs

 arch/x86/hyperv/Makefile           |  2 +-
 arch/x86/hyperv/nested.c           | 64 ++++++++++++++++++++++++++++++++++=
++++
 arch/x86/include/asm/hyperv-tlfs.h |  8 +++++
 arch/x86/include/asm/kvm_host.h    |  1 +
 arch/x86/include/asm/mshyperv.h    |  2 ++
 arch/x86/kvm/vmx.c                 | 15 +++++++++
 virt/kvm/kvm_main.c                | 12 ++++++-
 7 files changed, 102 insertions(+), 2 deletions(-)
 create mode 100644 arch/x86/hyperv/nested.c

--=20
2.14.3