On Wed, May 18, 2011 at 09:27:55PM +0200, Jan Kiszka wrote:
> > if an I/O is to the APIC page,
> > it's handled by the APIC
>
> That's not that simple. We need to tell apart:
> - if a cpu issued the request, and which one => forward to APIC
And cpu mode may affect where access is forwarded to. If cpu is in SMM
mode access to frame buffer may be forwarded to a memory (depends on
chipset configuration).
> - if the range was addressed by a device (PCI or other system bus
> devices) => forward to MSI or other MMIO handlers
>
--
Gleb.
