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 > 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 > _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
