For nested memory virtualization, Hyper-v doesn't set write-protect
L1 hypervisor EPT page directory and page table node to track changes
while it relies on guest to tell it changes via HvFlushGuestAddressLlist
hypercall. HvFlushGuestAddressLlist hypercall provides a way to flush
EPT page table with ranges which are specified by L1 hypervisor.
If L1 hypervisor uses INVEPT or HvFlushGuestAddressSpace hypercall to
flush EPT tlb, Hyper-V will invalidate associated EPT shadow page table
and sync L1's EPT table when next EPT page fault is triggered.
HvFlushGuestAddressLlist hypercall helps to avoid such redundant EPT
page fault and synchronization of shadow page table.
Lan Tianyu (13):
KVM: Add tlb_remote_flush_with_range callback in kvm_x86_ops
KVM/MMU: Add tlb flush with range helper function
KVM: Replace old tlb flush function with new one to flush a specified
range.
KVM/MMU: Flush tlb directly in the kvm_handle_hva_range()
KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()
KVM/MMU: Flush tlb directly in kvm_mmu_zap_collapsible_spte()
KVM: Add flush_link and parent_pte in the struct kvm_mmu_page
KVM: Add spte's point in the struct kvm_mmu_page
KVM/MMU: Replace tlb flush function with range list flush function
x86/hyper-v: Add HvFlushGuestAddressList hypercall support
x86/Hyper-v: Add trace in the
hyperv_nested_flush_guest_mapping_range()
KVM/VMX: Change hv flush logic when ept tables are mismatched.
KVM/VMX: Add hv tlb range flush support
arch/x86/hyperv/nested.c | 111 +++++++++++++++++++++++++++
arch/x86/include/asm/hyperv-tlfs.h | 17 +++++
arch/x86/include/asm/kvm_host.h | 10 +++
arch/x86/include/asm/mshyperv.h | 7 ++
arch/x86/include/asm/trace/hyperv.h | 14 ++++
arch/x86/kvm/mmu.c | 146 +++++++++++++++++++++++++++++++-----
arch/x86/kvm/paging_tmpl.h | 16 +++-
arch/x86/kvm/vmx.c | 41 +++++++---
8 files changed, 331 insertions(+), 31 deletions(-)
--
2.14.4
