Hi guys, We recently ran into/corrected a bug in our BIOS that was exposed by the recent updates to the way that the EFI code maps in memory during boot. Discussion here: http://comments.gmane.org/gmane.linux.kernel/1638074 Anyways, we now need to find a way to determine the BIOS version before efi_apply_memmap_quirks is called, so that we know whether or not the BIOS we're running requires the quirk. We have a function in one of our EFI runtime services that provides this information, but I'm having a lot of trouble calling this function early enough in boot. It seems that all the necessary function pointers are available well before efi_apply_memmap_quirks is called, but when trying to use efi_call_phys6 to call our function, I always hit a kernel paging error. I think the problem is that I really need to be doing this at a point where I can directly use physical addressing (the function pointer that we have stored in efi.uv_systab contains the physical address of our function) - at least that's the idea I get from our BIOS guys, but I really don't know what I'm talking about here :) Can anybody help me with how early in boot I need to make this call, and possibly with an appropriate location to stick the code in? Any advice is greatly appreciated. Thanks! - Alex -- 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
