15 Apr
2020
15 Apr
'20
1:13 p.m.
On Wed, Apr 15, 2020 at 10:40:05PM +1000, Andrew Donnellan wrote:
From: Michael Ellerman mpe@ellerman.id.au
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@ellerman.id.au [ajd: Backport to 4.19 tree, CVE-2020-11669] Signed-off-by: Andrew Donnellan ajd@linux.ibm.com
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