Re: [PATCH 6/7] openrisc: add SMP and NR_CPUS Kconfig options

From: Jonas Bonn
Date: Mon Sep 19 2016 - 10:31:28 EST

On 09/16/2016 04:43 PM, Stafford Horne wrote:
From: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx>

OpenRISC was not an SMP architecture last I looked... did the relevant spec updates get made? If not, NAK.

The issue is, the OpenRISC architecture shouldn't be a moving target defined by what the kernel supports... there's a spec that the kernel conforms to. This is important for the (few) real users of the architecture.


Signed-off-by: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx>
Signed-off-by: Stafford Horne <shorne@xxxxxxxxx>
arch/openrisc/Kconfig | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 489e7f9..2bcf8c3 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -98,6 +98,20 @@ config OPENRISC_HAVE_INST_DIV
Select this if your implementation has a hardware divide instruction
+config NR_CPUS
+ int "Maximum number of CPUs (2-32)"
+ range 2 32
+ depends on SMP
+ default "2"
+config SMP
+ bool "Symmetric Multi-Processing support"
+ help
+ This enables support for systems with more than one CPU. If you have
+ a system with only one CPU, say N. If you have a system with more
+ than one CPU, say Y.
+ If you don't know what to do here, say N.
source kernel/Kconfig.hz
source kernel/Kconfig.preempt