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authorMichael Ellerman <mpe@ellerman.id.au>2015-10-13 11:17:07 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2015-10-19 11:51:18 +0300
commitbed08b7e1fa41eac214acb17b7aa20a0e5c4b4e6 (patch)
treec60f9697982e3f33bb766a982dc8c268f620c4bb /arch/powerpc
parent39fcfb911c3862f1366ef84efbea10aff59421c2 (diff)
downloadlinux-bed08b7e1fa41eac214acb17b7aa20a0e5c4b4e6.tar.xz
powerpc/cell: Drop CONFIG_TUNE_CELL in favour of CONFIG_CELL_CPU
The TUNE_CELL option allows you to build a kernel that runs on multiple CPUs but is tuned (ie. optimised) to run on Cell CPUs. Now days no one is building a distro in that fashion, and any users who are building custom kernels for their Cell machines are better off building with CONFIG_CELL_CPU, which builds a kernel that only runs on Cell and therefore can be optimised even more aggresively. Dropping the option also avoids confusing other users, who are presented with an option to tune for Cell when they are not building for a Cell CPU at all. Suggested-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/Makefile2
-rw-r--r--arch/powerpc/configs/cell_defconfig2
-rw-r--r--arch/powerpc/configs/ps3_defconfig2
-rw-r--r--arch/powerpc/platforms/Kconfig.cputype11
4 files changed, 2 insertions, 15 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 3704db45a832..96efd8213c1c 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -157,8 +157,6 @@ CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
endif
endif
-CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
-
asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
diff --git a/arch/powerpc/configs/cell_defconfig b/arch/powerpc/configs/cell_defconfig
index 9227b517560a..db328e618bb9 100644
--- a/arch/powerpc/configs/cell_defconfig
+++ b/arch/powerpc/configs/cell_defconfig
@@ -1,5 +1,5 @@
CONFIG_PPC64=y
-CONFIG_TUNE_CELL=y
+CONFIG_CELL_CPU=y
CONFIG_ALTIVEC=y
CONFIG_SMP=y
CONFIG_NR_CPUS=4
diff --git a/arch/powerpc/configs/ps3_defconfig b/arch/powerpc/configs/ps3_defconfig
index 683b4c301feb..c40046074f8b 100644
--- a/arch/powerpc/configs/ps3_defconfig
+++ b/arch/powerpc/configs/ps3_defconfig
@@ -1,5 +1,5 @@
CONFIG_PPC64=y
-CONFIG_TUNE_CELL=y
+CONFIG_CELL_CPU=y
CONFIG_ALTIVEC=y
CONFIG_SMP=y
CONFIG_NR_CPUS=2
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index c140e94c7c72..142dff5e96d6 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -147,17 +147,6 @@ config 6xx
depends on PPC32 && PPC_BOOK3S
select PPC_HAVE_PMU_SUPPORT
-config TUNE_CELL
- bool "Optimize for Cell Broadband Engine"
- depends on PPC64 && PPC_BOOK3S
- help
- Cause the compiler to optimize for the PPE of the Cell Broadband
- Engine. This will make the code run considerably faster on Cell
- but somewhat slower on other machines. This option only changes
- the scheduling of instructions, not the selection of instructions
- itself, so the resulting kernel will keep running on all other
- machines.
-
# this is temp to handle compat with arch=ppc
config 8xx
bool