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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 4.14 tree, CVE-2020-11669]
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
66a93f5733