On Wed, May 11 2022 at 05:27, Kirill A. Shutemov wrote:
> LAM_U48 steals bits above 47-bit for tags and makes it impossible for
> userspace to use full address space on 5-level paging machine.
> Make these features mutually exclusive: whichever gets enabled first
> blocks the othe one.
So this patch prevents a mapping above 47bit when LAM48 is enabled, but
I fail to spot how an already existing mapping above 47bit would prevent
LAM48 from being enabled.
Maybe I'm missing something which makes this magically mutually
exclusive.
Thanks,
tglx
