On Mon, 2022-12-12 at 13:13 +0000, Paul Durrant wrote: > Ok, this tells me that we are intending to handle Hyper-V enlightenments > being simultaneously enabled... in which case that MSR above needs to > move, along with the cpuid leaves. It should be 0x40000200 in this case.
Ah, yes. That gets entertaining because hyperv_enabled() doesn't work at the time kvm_arch_init() runs, because kvm_hyperv_expand_features() hasn't run yet. But kvm_arch_init() is idempotent so for now I'll just call it *again* from kvm_arch_init_vcpu() to move the MSR in the hyperv case.
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