On 7/23/2018 3:39 PM, Wanpeng Li wrote: > 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) Thanks. Wanpeng! Just send a fix patch. > > Regards, > Wanpeng Li >
