Making SMP depend on (huge list of MACH_ and ARCH_ configs) is
bothersome to maintain and likely to lead to merge conflicts.
This patch moves the knowledge of which platforms are SMP-capable
to the individual machines. To enable this, a new HAVE_SMP config
option is introduced to allow machines to indicate that they can
run in a SMP configuration.
Signed-off-by: Dave Martin <dave.martin@xxxxxxxxxx>
Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
(for nomadik, ux500)
Acked-by: Tony Lindgren <tony@xxxxxxxxxxx>
(for omap)
---
Changes:
v5: Minor change to the Kconfig help text to make it more
informative.
arch/arm/Kconfig | 18 ++++++++++++++----
arch/arm/mach-exynos/Kconfig | 1 +
arch/arm/mach-imx/Kconfig | 1 +
arch/arm/mach-msm/Kconfig | 1 +
arch/arm/mach-omap2/Kconfig | 1 +
arch/arm/mach-realview/Kconfig | 4 ++++
arch/arm/mach-vexpress/Kconfig | 1 +
7 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 16a4b9e..eca82f9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -344,6 +344,7 @@ config ARCH_HIGHBANK
select CPU_V7
select GENERIC_CLOCKEVENTS
select HAVE_ARM_SCU
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select USE_OF
help
@@ -636,6 +637,7 @@ config ARCH_TEGRA
select GENERIC_GPIO
select HAVE_CLK
select HAVE_SCHED_CLOCK
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select ARCH_HAS_CPUFREQ
help
@@ -706,6 +708,7 @@ config ARCH_SHMOBILE
select HAVE_CLK
select CLKDEV_LOOKUP
select HAVE_MACH_CLKDEV
+ select HAVE_SMP
select GENERIC_CLOCKEVENTS
select MIGHT_HAVE_CACHE_L2X0
select NO_IOPORT
@@ -909,6 +912,7 @@ config ARCH_U8500
select CLKDEV_LOOKUP
select ARCH_REQUIRE_GPIOLIB
select ARCH_HAS_CPUFREQ
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
help
Support for ST-Ericsson's Ux500 architecture
@@ -1430,14 +1434,20 @@ menu "Kernel Features"
source "kernel/time/Kconfig"
+config HAVE_SMP
+ bool
+ help
+ This option should be selected by machines which have an SMP-
+ capable CPU.
+
+ The only effect of this option is to make the SMP-related
+ options available to the user for configuration.
+
config SMP
bool "Symmetric Multi-Processing"
depends on CPU_V6K || CPU_V7
depends on GENERIC_CLOCKEVENTS
- depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
- MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
- ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
- ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
+ depends on HAVE_SMP
depends on MMU
select USE_GENERIC_SMP_HELPERS
select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 7f2347b..e1efbca 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -17,6 +17,7 @@ choice
config ARCH_EXYNOS4
bool "SAMSUNG EXYNOS4"
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
help
Samsung EXYNOS4 SoCs based systems
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 5f7f9c2..29a3d61 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -615,6 +615,7 @@ config SOC_IMX6Q
select HAVE_IMX_GPC
select HAVE_IMX_MMDC
select HAVE_IMX_SRC
+ select HAVE_SMP
select USE_OF
help
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index ebde97f..e6beaff 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -67,6 +67,7 @@ config MSM_SOC_REV_A
bool
config ARCH_MSM_SCORPIONMP
bool
+ select HAVE_SMP
config ARCH_MSM_ARM11
bool
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index c841578..bb1b670 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -43,6 +43,7 @@ config ARCH_OMAP4
depends on ARCH_OMAP2PLUS
select CPU_V7
select ARM_GIC
+ select HAVE_SMP
select LOCAL_TIMERS if SMP
select MIGHT_HAVE_CACHE_L2X0
select PL310_ERRATA_588369
diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig
index 3dd620f..c593be4 100644
--- a/arch/arm/mach-realview/Kconfig
+++ b/arch/arm/mach-realview/Kconfig
@@ -12,6 +12,7 @@ config REALVIEW_EB_A9MP
bool "Support Multicore Cortex-A9 Tile"
depends on MACH_REALVIEW_EB
select CPU_V7
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
help
Enable support for the Cortex-A9MPCore tile fitted to the
@@ -22,6 +23,7 @@ config REALVIEW_EB_ARM11MP
depends on MACH_REALVIEW_EB
select CPU_V6K
select ARCH_HAS_BARRIERS if SMP
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
help
Enable support for the ARM11MPCore tile fitted to the Realview(R)
@@ -41,6 +43,7 @@ config MACH_REALVIEW_PB11MP
select CPU_V6K
select ARM_GIC
select HAVE_PATA_PLATFORM
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select ARCH_HAS_BARRIERS if SMP
help
@@ -82,6 +85,7 @@ config MACH_REALVIEW_PBX
bool "Support RealView(R) Platform Baseboard Explore"
select ARM_GIC
select HAVE_PATA_PLATFORM
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
select ARCH_SPARSEMEM_ENABLE if CPU_V7 && !REALVIEW_HIGH_PHYS_OFFSET
select ZONE_DMA if SPARSEMEM
diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index a8aefc8..9b3d0fb 100644
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -8,6 +8,7 @@ config ARCH_VEXPRESS_CA9X4
select ARM_ERRATA_720789
select ARM_ERRATA_751472
select ARM_ERRATA_753970
+ select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
endmenu
--
1.7.4.1
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