MIPS: Octeon: Enable KASLR
authorSteven J. Hill <steven.hill@cavium.com>
Tue, 13 Dec 2016 20:25:37 +0000 (14:25 -0600)
committerRalf Baechle <ralf@linux-mips.org>
Tue, 3 Jan 2017 15:34:35 +0000 (16:34 +0100)
commit3ff72be4c9ce269c5b7adff9b0f912a2df3cb987
tree24c14cb9ca8c081670310277b252ea3c9027bf30
parent126c1113bf3e6facdd5562064043b9e8fa8c9bf1
MIPS: Octeon: Enable KASLR

This patch enables KASLR for Octeon systems. The SMP startup code is
such that the secondaries monitor the volatile variable
'octeon_processor_relocated_kernel_entry' for any non-zero value.
The 'plat_post_relocation hook' is used to set that value to the
kernel entry point of the relocated kernel. The secondary CPUs will
then jusmp to the new kernel, perform their initialization again
and begin waiting for the boot CPU to start them via the relocated
loop 'octeon_spin_wait_boot'. Inspired by Steven's code from Cavium.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14669/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/Kconfig
arch/mips/cavium-octeon/smp.c
arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h