Hello Jörg, On Wed, Feb 24, 2021 at 15:01:26 CET, Joerg-C. Boehme wrote: > I have some question about the: acpi_drv and platform_drv. > > In short: > Is acpi_drv and platform_drv are only supporting hardware boards with PCIe ?
In general, no, we do not depend on PCIe directly. Nevertheless, I admit that we do not test PCIe-less systems in any real-world scenario. > And start the var/run/lighttpd.iso with qemu-system-x86_64 (without -machine > q35 parameter!) > qemu-system-x86_64 -no-kvm -display sdl -cpu core2duo -nographic -netdev > user,id=net0,hostfwd=tcp::5555-:80,hostfwd=tcp::5556-:443 -net > nic,model=e1000,netdev=net0 -serial mon:stdio -m 512 -cdrom > var/run/lighttpd.iso As you discovered this is not supported. The reason is not the missing PCIe capability but that Qemu's i440FX chipset does not support ECAM/MMCONF (memory-mapped) PCI configuration space access. We replaced the I/O port based PCI driver implementation by MMCONF based access after a vivid discussion in 2018 [1]. Thus, we may indirectly depend on PCIe if systems lacking PCIe ports also lack MMCONF. > * Can I somehow "manuel" configure the system on 440FX based hardware ? In theory, you could generate the acpi_drv report by hand. But that's not my playground. > * Is there a reason why platform_drv is not supporting older hardware ? We switched to MMCONF because of demand from the community and the promise that it's widely available. We never considered to support both PCI-config access options for complexity and testing effort reasons. [1] https://github.com/genodelabs/genode/commit/47724c68c2c27a430e9a60c55ebb42f8d4ebf941 Greets -- Christian Helmuth Genode Labs https://www.genode-labs.com/ · https://genode.org/ https://twitter.com/GenodeLabs · /ˈdʒiː.nəʊd/ Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth _______________________________________________ Genode users mailing list [email protected] https://lists.genode.org/listinfo/users
