On 7/19/2018 4:57 PM, Paolo Bonzini wrote: > On 19/07/2018 10:39, Tianyu Lan wrote: >> 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. > > Thanks, this looks good apart from a global replace of EFAULT with > ENOTSUP (which can be done when applying). Can I have an explicit ack > for patches 1 and 2 from the Hyper-V people?
Thanks, Paolo. I will try to hyper-V people's ack. > > Thanks, > > Paolo > >> 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 >> >
