'XMM fast hypercall input feature' is supported by KVM since v5.14, it allows for faster Hyper-V hypercall processing.
'Enlightened MSR-Bitmap' is a new nested specific enlightenment speeds up L2 vmexits by avoiding unnecessary updates to L2 MSR-Bitmap. KVM support for the feature on Intel CPUs is coming in v5.17 and is queued for 5.18 for AMD CPUs. Vitaly Kuznetsov (3): i386: Use hv_build_cpuid_leaf() for HV_CPUID_NESTED_FEATURES i386: Hyper-V Enlightened MSR bitmap feature i386: Hyper-V XMM fast hypercall input feature docs/hyperv.txt | 16 +++++++++++++++ target/i386/cpu.c | 4 ++++ target/i386/cpu.h | 3 ++- target/i386/kvm/hyperv-proto.h | 7 ++++++- target/i386/kvm/kvm.c | 37 ++++++++++++++++++++++++++-------- 5 files changed, 57 insertions(+), 10 deletions(-) -- 2.35.1
