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| author | Steven J. Hill <steven.hill@cavium.com> | 2016-12-13 23:25:37 +0300 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-01-03 18:34:35 +0300 |
| commit | 3ff72be4c9ce269c5b7adff9b0f912a2df3cb987 (patch) | |
| tree | 24c14cb9ca8c081670310277b252ea3c9027bf30 /arch/mips/Kconfig | |
| parent | 126c1113bf3e6facdd5562064043b9e8fa8c9bf1 (diff) | |
| download | linux-3ff72be4c9ce269c5b7adff9b0f912a2df3cb987.tar.xz | |
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>
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 80832aa8e4fb..7cb4b0e5f49a 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -910,6 +910,7 @@ config CAVIUM_OCTEON_SOC select NR_CPUS_DEFAULT_16 select BUILTIN_DTB select MTD_COMPLEX_MAPPINGS + select SYS_SUPPORTS_RELOCATABLE help This option supports all of the Octeon reference boards from Cavium Networks. It builds a kernel that dynamically determines the Octeon @@ -2571,7 +2572,7 @@ config SYS_SUPPORTS_NUMA config RELOCATABLE bool "Relocatable kernel" - depends on SYS_SUPPORTS_RELOCATABLE && (CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_MIPS32_R6 || CPU_MIPS64_R6) + depends on SYS_SUPPORTS_RELOCATABLE && (CPU_MIPS32_R2 || CPU_MIPS64_R2 || CPU_MIPS32_R6 || CPU_MIPS64_R6 || CAVIUM_OCTEON_SOC) help This builds a kernel image that retains relocation information so it can be loaded someplace besides the default 1MB. |