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Subject: [PATCH V2 0/5] KVM/x86/hyper-V: Introduce PV guest address space
 mapping flush support
Thread-Topic: [PATCH V2 0/5] KVM/x86/hyper-V: Introduce PV guest address space
 mapping flush support
Thread-Index: AQHUF2OPc6l/VDQYCUCP6LQoqrm/2w==
Date:   Mon, 9 Jul 2018 09:02:28 +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.

Change since v1:
       - Fix compilation error for non-x86 platform.
       - Use ept_pointers_match to check condition of identical ept
table pointer and get ept pointer from struct vcpu_vmx->ept_pointer.
       - Add hyperv_nested_flush_guest_mapping ftrace support

Lan Tianyu (5):
  X86/Hyper-V: Add flush HvFlushGuestPhysicalAddressSpace hypercall
    support
  KVM: Add tlb remote flush callback in kvm_x86_ops.
  KVM/VMX: Add identical ept table pointer check
  KVM/x86: Add tlb_remote_flush callback support for vmx
  X86/Hyper-V: Add hyperv_nested_flush_guest_mapping ftrace support

 arch/x86/hyperv/Makefile            |  2 +-
 arch/x86/hyperv/nested.c            | 67 +++++++++++++++++++++++++++++++++=
++++
 arch/x86/include/asm/hyperv-tlfs.h  |  8 +++++
 arch/x86/include/asm/kvm_host.h     | 11 ++++++
 arch/x86/include/asm/mshyperv.h     |  2 ++
 arch/x86/include/asm/trace/hyperv.h | 14 ++++++++
 arch/x86/kvm/vmx.c                  | 59 ++++++++++++++++++++++++++++++++
 include/linux/kvm_host.h            |  7 ++++
 virt/kvm/kvm_main.c                 | 11 +++++-
 9 files changed, 179 insertions(+), 2 deletions(-)
 create mode 100644 arch/x86/hyperv/nested.c

--=20
2.14.3