powerpc/85xx: add HOTPLUG_CPU support

Add support to disable and re-enable individual cores at runtime on
MPC85xx/QorIQ SMP machines. Currently support e500v1/e500v2 core.

MPC85xx machines use ePAPR spin-table in boot page for CPU kick-off.  This
patch uses the boot page from bootloader to boot core at runtime.  It
supports 32-bit and 36-bit physical address.

Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Jin Qing <b24347@freescale.com>
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 98e513b62709..b8bab10bd0f1 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -215,7 +215,8 @@ config ARCH_HIBERNATION_POSSIBLE
 config ARCH_SUSPEND_POSSIBLE
         def_bool y
         depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
-                   (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
+                   (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
+                   || 44x || 40x
 
 config PPC_DCR_NATIVE
         bool
@@ -328,7 +329,8 @@ config SWIOTLB
 
 config HOTPLUG_CPU
         bool "Support for enabling/disabling CPUs"
-        depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV)
+        depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || \
+        PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
         ---help---
           Say Y here to be able to disable and re-enable individual
           CPUs at runtime on SMP machines.