On Fri, 13 Nov, at 10:22:10AM, Ingo Molnar wrote: > > * Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx> wrote: > > > +We map EFI runtime services in the efi_pgd PGD in the virtual range of > > +64Gb (arbitrarily set, can be raised if needed). The mappings are not > > +part of any other kernel PGD and are only available during EFI runtime > > +calls. > > Is that virtual address range 0-64Gb, i.e.: > > 0x00000000.00000000 - 0x00000010.00000000 > > or is it somewhere else? You've snipped the patch hunk that gives the address range used, diff --git a/Documentation/x86/x86_64/mm.txt b/Documentation/x86/x86_64/mm.txt index 05712ac83e38..a9885bb1ac22 100644 --- a/Documentation/x86/x86_64/mm.txt +++ b/Documentation/x86/x86_64/mm.txt @@ -16,6 +16,8 @@ ffffec0000000000 - fffffc0000000000 (=44 bits) kasan shadow memory (16TB) ... unused hole ... ffffff0000000000 - ffffff7fffffffff (=39 bits) %esp fixup stacks ... unused hole ... +ffffffef00000000 - ffffffff00000000 (=64 GB) EFI region mapping space +... unused hole ... ffffffff80000000 - ffffffffa0000000 (=512 MB) kernel text mapping, from phys 0 ffffffffa0000000 - ffffffffff5fffff (=1525 MB) module mapping space ffffffffff600000 - ffffffffffdfffff (=8 MB) vsyscalls -- 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
