On Tue, Oct 02, 2012 at 02:50:09PM -0700, H. Peter Anvin wrote: > That sounds like exactly the opposite of normal /dev/mem behavior... we > allow access to non-memory resources (which really could do anything if > misused), but not memory.
>From arch/x86/mm/init.c: * On x86, access has to be given to the first megabyte of ram because that area * contains bios code and data regions used by X and dosemu and similar apps. Limiting this to just RAM would be safer than it currently is. I'm not convinced that there's any good reason to allow *any* access down there for EFI systems, though. -- Matthew Garrett | mj...@srcf.ucam.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
