lkml.org 
[lkml]   [2009]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    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.

    -Greg


    [unhandled content-type:application/pgp-signature]
    \
     
     \ /
      Last update: 2009-05-07 23:17    [W:0.025 / U:32.280 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site