On Wed, Apr 15, 2020 at 10:40:05PM +1000, Andrew Donnellan wrote: > From: Michael Ellerman <mpe@xxxxxxxxxxxxxx> > > commit 53a712bae5dd919521a58d7bad773b949358add0 upstream. > > In order to implement KUAP (Kernel Userspace Access Protection) on > Power9 we will be using the AMR, and therefore indirectly the > UAMOR/AMOR. > > So save/restore these regs in the idle code. > > Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> > [ajd: Backport to 4.19 tree, CVE-2020-11669] > Signed-off-by: Andrew Donnellan <ajd@xxxxxxxxxxxxx> > --- > arch/powerpc/kernel/idle_book3s.S | 27 +++++++++++++++++++++++---- > 1 file changed, 23 insertions(+), 4 deletions(-) This and the 4.14 patch now queued up, thanks. greg k-h
