On 08/26/2010 10:17 AM, Jack Steiner wrote: > Map ACPI tables as WB on x86_64. No substantive changes to IA64. > > > Signed-off-by: Jack Steiner <steiner@xxxxxxx> > > --- > V2 - Change the patch to unconditionally map ACPI tables as WB on x86_64. > I'm still some paranoid about this because of the potential imapct on > some platforms with weird BIOSs. However, note that on EFI-enabled > systems (like UV), the ACPI tables are already mapped as WB memory. > This is done in the EFI function efi_enter_virtual_mode(). > The ACPI code in acpi_os_map_memory() is not currently aware of the > EFI mapping & currently maps the memory as UC. This seems like a bug. > I really think that it's all a consequence of the fact that ioremap() became implicitly UC when we added PAT support (being the more conservative choice.) Len, want to take this one or should I? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
