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

[Igor Mammedov]

On Tue, 16 Mar 2021 13:49:57 +0100
Paolo Bonzini <pbonzini@redhat.com> wrote:

> 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.

I'm in process of preparing test env for it with reported Windows version,
so I'll try this case as well.

> 
> Paolo
>