Re: qemu oddness with isolinux vesamenu.c32

H. Peter Anvin
2008-07-19T18:43:08Z

Avi Kivity wrote:
>
> kvm allows writing into the bios; qemu does not. I thought it was a kvm
> bug, but turns out that it's a qemu bug...
>
> (though to be fair, true emulation ought to start out read-only, then be
> enabled by the bios ram shadow mechanism)
>

Yes, although simulating the memory "pre-shadowed" works just as well;
then it should be marked readonly by the BIOS immediately prior to
running INT 19h.

-hpa