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From:   Tianyu Lan <Tianyu.Lan@microsoft.com>
CC:     Tianyu Lan <Tianyu.Lan@microsoft.com>,
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Subject: [PATCH V3 0/4] KVM/x86/hyper-V: Introduce PV guest address space
 mapping flush support
Thread-Topic: [PATCH V3 0/4] KVM/x86/hyper-V: Introduce PV guest address space
 mapping flush support
Thread-Index: AQHUHzwUffUmbGD3SUGBq0C4VrI5YA==
Date:   Thu, 19 Jul 2018 08:39:59 +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 v2:
       - Make ept_pointers_match as tristate "check", "match" and "mismatch=
".
       Set "check" in vmx_set_cr3(), check all ept table pointers in hv_rem=
ote_flush_tlb()
       and call hypercall when all ept pointers are same.
       - Rename kvm_arch_hv_flush_remote_tlb with kvm_arch_flush_remote_tlb=
 and
       Rename kvm_x86_ops->hv_tlb_remote_flush with kvm_x86_ops->tlb_remote=
_flush
       - Fix issue that ignore updating tlbs_dirty during calling kvm_arch_=
flush_remote_tlbs()
       - Merge patch "KVM/VMX: Add identical ept table pointer check" and
       patch "KVM/x86: Add tlb_remote_flush callback support for vmx"

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_poi=
nter.
       - Add hyperv_nested_flush_guest_mapping ftrace support
		    =20


Lan Tianyu (4):
  X86/Hyper-V: Add flush HvFlushGuestPhysicalAddressSpace hypercall
    support
  X86/Hyper-V: Add hyperv_nested_flush_guest_mapping ftrace support
  KVM: Add tlb remote flush callback in kvm_x86_ops.
  KVM/x86: Add tlb_remote_flush callback support for vmx

 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                  | 72 +++++++++++++++++++++++++++++++++=
+++-
 include/linux/kvm_host.h            |  7 ++++
 virt/kvm/kvm_main.c                 |  3 +-
 9 files changed, 183 insertions(+), 3 deletions(-)
 create mode 100644 arch/x86/hyperv/nested.c

--=20
2.14.3