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
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