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

[Igor Mammedov]

On Tue, 16 Mar 2021 17:28:52 +0100
Reinoud Zandijk <reinoud@NetBSD.org> wrote:

> On Tue, Mar 16, 2021 at 01:53:01PM +0100, Igor Mammedov wrote:
> > > The image file was downloaded pre-installed from Microsoft for Edge 
> > > browser
> > > evaluation. I used it first on Qemu 5.1 IIRC and it kept working in Qemu 
> > > 5.2.  
> > 
> > issue looks similar to:
> > 0a343a5add7 i386/acpi: restore device paths for pre-5.1 vms
> > 
> > I think that's the problem, the old Windows image (installed on old QEMU),
> > may fail to boot if started on newest machine type of a newer QEMU.
> > User should use versioned machine type (the same version it was installed 
> > on)
> > to keep it working the same way otherwise there is no promise that machine 
> > ABI
> > won't change.  
> 
> The machine setup doesn't mind changing the machine to the Q35 type; its only
> the older machine thats failing to work.

never-mind, either we have a bug on piix4 side of QEMU or Windows doesn't 
support
smm less mode, probably the former since q35 works.
I'm trying to dig out what's going wrong,
maybe Isaku Yamahata can also look into it.

> 
> Reinoud
> 
>