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    SubjectRe: [RFC PATCH 0/3] generic hypercall support
    Arnd Bergmann wrote:
    > On Thursday 07 May 2009, Gregory Haskins wrote:
    >> What I am not clear on is how you would know to flag the address to
    >> begin with.
    > pci_iomap could look at the bus device that the PCI function sits on.
    > If it detects a PCI bridge that has a certain property (config space
    > setting, vendor/device ID, ...), it assumes that the device itself
    > will be emulated and it should set the address flag for IO_COND.
    > This implies that all pass-through devices need to be on a different
    > PCI bridge from the emulated devices, which should be fairly
    > straightforward to enforce.

    Thats actually a pretty good idea.

    Chris, is that issue with the non ioread/iowrite access of a mangled
    pointer still an issue here? I would think so, but I am a bit fuzzy on
    whether there is still an issue of non-wrapped MMIO ever occuring.


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