[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Taken fault at bad CS c000...
On 15/2/07 08:36, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote: > 2) No permission on I/O ports (0xCF8/0xCFC, 0x20e0, 0x20e4) > which is weird: > Seems that this version of VGA bios will try to scan PCI bus. > 0x20e0/0x20e4 is the I/O BAR configured for integrated graphics > controller. However I printed all sys_ioperm, and found that Xorg > only requests for [0x0-0x3ff],[0x40-0x43],[0x60-0x63]. Then each > time when above ports are accessed within VM86 mode, > guest_io_okay will fail since related bitmap bits are all 1s. So I'm > interested that why X-windows can still work under such case. Do > you know any path to enable I/O ports specially for VM86 mode? It may be that the X Server fixes up the faults. I'm pretty sure it can do various bits of fixup emulation. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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