Re: Windows 10 won't run on default x86_64 machine anymore

[Paolo Bonzini]

On 16/03/21 13:13, Igor Mammedov wrote:
> > > Surprisingly without accelerator ie with tcg the default machine does seem to
> > > get to the login prompt. Is the ACPI data tailored to indicate an
> > > accelerator/VM or is it static? Could it be that the CPU reported by my
> > > machine is causing the issue? With the NVMM accelerator it passes on the hosts
> >
> > I think tcg case can be explained by x86_machine_is_smm_enabled()
> >
> >    bool x86_machine_is_smm_enabled(const X86MachineState *x86ms)
> >    ...
> >        if (tcg_enabled() || qtest_enabled()) {
> >            smm_available = true;
> >        } else if (kvm_enabled()) {
> >            smm_available = kvm_has_smm();
> >        }
> >    ...
> >
> > Although I don't know about nvmm case, this function also needs to be updated
> > if smi isn't supported.
> can you submit a patch for this please?

nvmm is not part of upstream yet, so I guess it's up to Reinoud to fix 
it.  Still, reproducing his testing conditions with KVM and -M smm=off 
is probably interesting because it also affects HAX, HVF and WHPX which 
are supported upstream.

Paolo