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ARM: SMP: Refactor Kconfig to be more maintainable

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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@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
        (for nomadik, ux500)
Acked-by: Tony Lindgren <tony@atomide.com>
        (for omap)
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
        (for exynos)
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
        (for imx)
Acked-by: Olof Johansson <olof@lixom.net>
        (for tegra)
This commit is contained in:
Dave Martin 2011-12-07 15:38:04 +00:00
parent ce5ea9f376
commit 3b55658aef
7 changed files with 23 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
arch/arm/Kconfig
View File

@ -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

1
arch/arm/mach-exynos/Kconfig
View File

@ -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

1
arch/arm/mach-imx/Kconfig
View File

@ -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

1
arch/arm/mach-msm/Kconfig
View File

@ -67,6 +67,7 @@ config MSM_SOC_REV_A
bool
config ARCH_MSM_SCORPIONMP
bool
select HAVE_SMP
config ARCH_MSM_ARM11
bool

1
arch/arm/mach-omap2/Kconfig
View File

@ -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

4
arch/arm/mach-realview/Kconfig
View File

@ -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

1
arch/arm/mach-vexpress/Kconfig
View File

@ -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