Re: Kernel panic on 'floppy' module load, Xen HVM, since 4.19.143

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

On Mon, Sep 28, 2020 at 07:02:19AM +0200, Jürgen Groß wrote:
> On 27.09.20 13:14, Marek Marczykowski-Górecki wrote:
> > Hi all,
> > 
> > I get kernel panic on 'floppy' module load. If I blacklist the module,
> > then everything works.
> > The issue happens in Xen HVM, other virtualization modes (PV, PVH) works
> > fine. PV dom0 works too. I haven't tried bare metal, but I assume it
> > works fine too.
> 
> Could you please try bare metal?

I don't have any hw with floppy controller at hand...
Booting on what I have, it works, loading floppy just says -ENODEV.

> Working in PV and PVH mode, but not in HVM, is pointing towards either
> an issue in IRQ handling (not Xen specific) or in qemu.
> 
> It might be that Xen is advertising a rarely used APIC mode. In case
> bare metal is working it might be helpful to have APIC related boot
> message differences between HVM guest and bare metal.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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