[vfio-users] IGD passthrough: No Seabios output; PTE read access not set

[Manuel Ullmann]

Hi,

thanks for the explanation. bios-256k.bin is the only non-symlinked blob
on Gentoo. All other blobs of vgabios, sgabios and seabios are symlinked.

I switched to libvirt and kernel-4.8.13 in the meantime and have issues
with getting hugepages and emulated sound devices to work (in a
non-crackling way), but I’d rather put those to libvirt-users and
qemu-discussion. Thank you again.

Best regards,
Manuel
>   Hi,
>
>> confusing though, that removing the -bios option fixed it. I thought
>> qemu depends on seabios and if I diff the bios.bin files in
>> /usr/share/seabios and /usr/share/qemu diff finds no binary differences.
>> So which bios is qemu now using? Is it built-in? An explanation would be
>> very much appreciated.
> /usr/share/qemu/bios-256k.bin is the default.
>
> /usr/share/qemu/bios.bin is there for backward compatibility with older
> qemu versions which had a bios with only 128k size.  It has certain
> features turned off to make it fit.  Which is probably the reason why
> things break if you try to use it.
>
> Distributions typically have a separate seabios package installing stuff
> to /usr/share/seabios, and /usr/share/qemu has symlinks to that place
> instead of the blobs.
>
> HTH,
>   Gerd