On Thu, Jul 15, 2010 at 07:45:06AM -0500, Anthony Liguori wrote: > On 07/15/2010 04:10 AM, Joerg Roedel wrote: >> If this means a seperate interface for device dma accesses and not fold >> that functionality into the cpu_physical_memory* interface I agree too :-) >> > No. PCI devices should never call cpu_physical_memory*. Fully agreed. > PCI devices should call pci_memory*. > > ISA devices should call isa_memory*. This is a seperate interface. I like the idea and as you stated below it has clear advantages, so lets go this way. > All device memory accesses should go through their respective buses. > There can be multiple IOMMUs at different levels of the device > hierarchy. If you don't provide bus-level memory access functions that > chain through the hierarchy, it's extremely difficult to implement all > the necessary hooks to perform the translations at different places. Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
