On Tue, 26 Jan 2021 13:33:52 -0800 Ben Widawsky <b...@bwidawsk.net> wrote:
> I'm working on CXL 2.0 type 3 memory devices [1]. In short, these are PCIe > devices > that have persistent memory on them. As such, it would be nice to inherit from > both a PCI_DEVICE class as well as an NVDIMM device class. > > Truth be told, using TYPE_MEMORY_DEVICE as the interface does provide most of > what I need. could you be more specific on what you need from it? >I'm wondering what the best way to handle this is. Currently, the > only thing NVDIMM class provides is write/read_label_data, this is driven by > _DSM. For CXL, the mechanism to read/write the equivalent area is not done via > _DSM, but done directly via a mailbox interface. However, the intent is the > same, and so utilizing similar code seems ideal. > > If there's a desire to unify these code paths, I'd need something like > multiple > inheritance. I'm looking for some feedback here on how to do it. > > Thanks. > Ben > > [1]: > https://lore.kernel.org/qemu-devel/20210105165323.783725-1-ben.widaw...@intel.com/ >
