On Mon, 02 May, at 04:39:31PM, Alex Thorlton wrote: > > If you think we're violating EFI rules by accessing these registers from > both sides of the fence, please let me know. I'd like to make sure that > we get everything behaving the way it should be! Oh no, I don't think this is violating the UEFI spec at all, but I do think it goes against the spirit of the way other implementations are designed; with maximum separation between firmware and kernel. In a perfect world, I'd suggest mapping the MMR range in both the kernel and firmware, at different virtual address ranges, but have the firmware's version opaque to the kernel and only described by an EfiMemoryMappedIO region, or something. That is ignoring any region type conflicts that may arise. Of course, we don't operate in a perfect world, so a good solution may be to just insert the kernels' mapping into the EFI page tables. -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
