On Wed, Sep 05, 2012 at 02:30:10PM +0100, Alan Cox wrote: > On Wed, 5 Sep 2012 14:20:07 +0100 > Matthew Garrett <mjg@xxxxxxxxxx> wrote: > > We've no good way of knowing what the firmware's giving us - we copy it > > to RAM in the EFI init process, so by the time we're here it certainly > > shouldn't be on the PCI bus. > > In which case how do you know that physical address you have been given > actually has a mapping in kernel virtual space. It seems like it ought to > be getting an ioremap in that case ? > > phys_to_virt is not valid for arbitary addresses. The pages are allocated as EFI_LOADER_DATA, and that gets mapped as E820_RAM. -- Matthew Garrett | mjg59@xxxxxxxxxxxxx -- 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
