> On 16 Jan 2020, at 1:27, Sean Christopherson <sean.j.christopherson@xxxxxxxxx> wrote: > > On Wed, Jan 15, 2020 at 06:10:13PM +0100, Vitaly Kuznetsov wrote: >> With fine grained VMX feature enablement QEMU>=4.2 tries to do KVM_SET_MSRS >> with default (matching CPU model) values and in case eVMCS is also enabled, >> fails. > > As in, Qemu is blindly throwing values at KVM and complains on failure? > That seems like a Qemu bug, especially since Qemu needs to explicitly do > KVM_CAP_HYPERV_ENLIGHTENED_VMCS to enable eVMCS. See: https://patchwork.kernel.org/patch/11316021/ For more context. -Liran
