On Fri, 20 Jul 2018 at 16:32, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > > On 20/07/2018 05:58, KY Srinivasan wrote: > > > > > >> -----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> > > Queued, thanks! My CONFIG_HYPERV is disabled, there is a warning when compiling kvm/queue. warning: ‘hv_remote_flush_tlb’ defined but not used [-Wunused-function] static int hv_remote_flush_tlb(struct kvm *kvm) Regards, Wanpeng Li
