> -----Original Message----- > From: Tianyu Lan > Sent: Thursday, July 19, 2018 1:40 AM > Cc: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>; devel@xxxxxxxxxxxxxxxxxxxxxx; > Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>; hpa@xxxxxxxxx; > kvm@xxxxxxxxxxxxxxx; KY Srinivasan <kys@xxxxxxxxxxxxx>; linux- > kernel@xxxxxxxxxxxxxxx; mingo@xxxxxxxxxx; pbonzini@xxxxxxxxxx; > rkrcmar@xxxxxxxxxx; Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>; > tglx@xxxxxxxxxxxxx; x86@xxxxxxxxxx; Michael Kelley (EOSG) > <Michael.H.Kelley@xxxxxxxxxxxxx>; vkuznets@xxxxxxxxxx > Subject: [PATCH V3 0/4] KVM/x86/hyper-V: Introduce PV guest address > space mapping flush support > > Hyper-V provides a para-virtualization hypercall > HvFlushGuestPhysicalAddressSpace > to flush nested VM address space mapping in l1 hypervisor and it's to reduce > overhead > of flushing ept tlb among vcpus. The tradition way is to send IPIs to all > affected > vcpus and executes INVEPT on each vcpus. It will trigger several vmexits for > 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_remote_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_pointer. > - Add hyperv_nested_flush_guest_mapping ftrace support > > > > 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 Acked-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> > > -- > 2.14.3 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
