Re: [Qemu-devel] PCI: Memory mapped / ROM resources

[Fabrice Bellard]

Gianni Tedesco wrote:

> I'm adding a host PCI proxy layer that works under Linux, ie: make host
> PCI devices appear within the emulator. Similar to 'pcidev' on bochs,
> but without a custom kernel module, and some minor performance
> enhancements. I ought to have a patch ready by tomorrow evening.

Interesting. How do you redirect irqs ?

> PS. I am using mmap() on /proc/pci/bus/XX/YY.Z nodes to map PCI
> registers, probably there is a nice way to allow the code generator to
> generate accesses directly on to these vmas? It's probably not that much
> of a win in any case, but interesting.

You'd better defines memory access callbacks. It could be possible to 
define RAM memory areas for which the access is optimised internally by 
the CPU core, but currently they must stay in the phys_ram_base array.

Fabrice.