Re: [Xen-devel] Xen with dom0 pvops on ultra-recent "git tip" kernel on x86_64

[Christophe Saout <christophe@xxxxxxxx>]

Hello,

> The X server crashes in some I/O port "inb()" command.  Seems like the
> io permissions aren't correctly passed through or something. (iopl or
> ioperm or so)  I'll try to debug a bit more later.

The native Xen kernel has an arch/x86/kernel/ioport-xen.c which calls:

        HYPERVISOR_physdev_op(PHYSDEVOP_set_iobitmap, &set_iobitmap);

Is this a feature mabye still missing from the paravirtualized Xen?

If yes, what would it take?  A new paravirt call?

Thanks,
        Christophe



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