Benjamin Herrenschmidt <b...@kernel.crashing.org> wrote on 12/01/2010 03:40:45:
>
> On Fri, 2010-01-08 at 17:46 +0100, Joakim Tjernlund wrote:
> > The newly added fixup for buggy dcbX insn's has
> > a bug that always trigger a kernel TLB walk so a user space
> > dcbX insn will cause a Kernel Machine Check if it hits DTLB error.
> >
> > Signed-off-by: Joakim Tjernlund <joakim.tjernl...@transmode.se>
> > ---
> >
> > I found this problem in 2.4 and forward ported it to 2.6. I
> > cannot test it so I cannot be 100% sure I got it right.
> >
> > arch/powerpc/kernel/head_8xx.S | 4 ++--
> > 1 files changed, 2 insertions(+), 2 deletions(-)
>
> Do you have something to make sure that TASK_SIZE is never bigger than
> 2G ? Else userspace could be all the way to 0xbfffffff ...
No, but this is 8xx :) The TLB handlers has the same "limitation" and has always
been so.
Jocke
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
