It has been a while since my 'RFC' and I apologize for that. Changes since RFC: - 'hv-all' is a migration blocker. - all existing and newly added Hyper-V enlightenments are somewhat documented.
Original description: The recently introduced Direct Mode for Hyper-V synthetic timers enlightenment is only exposed through KVM_GET_SUPPORTED_HV_CPUID ioctl. Take the opportunity and re-implement the way we handle Hyper-V enlightenments in QEMU, add support for hv-stimer-direct and 'hv-all' pass-through mode, add missing dependencies between enlightenments. Vitaly Kuznetsov (8): i386/kvm: add support for KVM_GET_SUPPORTED_HV_CPUID i386/kvm: move Hyper-V CPUID filling to hyperv_handle_properties() i386/kvm: document existing Hyper-V enlightenments i386/kvm: implement 'hv-all' pass-through mode i386/kvm: hv-evmcs requires hv-vapic i386/kvm: hv-stimer requires hv-time and hv-synic i386/kvm: hv-tlbflush/ipi require hv-vpindex i386/kvm: add support for Direct Mode for Hyper-V synthetic timers docs/hyperv.txt | 200 ++++++++++ target/i386/cpu.c | 2 + target/i386/cpu.h | 2 + target/i386/hyperv-proto.h | 1 + target/i386/kvm.c | 764 ++++++++++++++++++++++++++++--------- 5 files changed, 785 insertions(+), 184 deletions(-) create mode 100644 docs/hyperv.txt -- 2.20.1