aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/pending-4.14/308-mips32r2_tune.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/pending-4.14/308-mips32r2_tune.patch')
-rw-r--r--target/linux/generic/pending-4.14/308-mips32r2_tune.patch22
1 files changed, 22 insertions, 0 deletions
diff --git a/target/linux/generic/pending-4.14/308-mips32r2_tune.patch b/target/linux/generic/pending-4.14/308-mips32r2_tune.patch
new file mode 100644
index 0000000000..7f98616d7a
--- /dev/null
+++ b/target/linux/generic/pending-4.14/308-mips32r2_tune.patch
@@ -0,0 +1,22 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: kernel: add -mtune=34kc to MIPS CFLAGS when building for mips32r2
+
+This provides a good tradeoff across at least 24Kc-74Kc, while also
+producing smaller code.
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+ arch/mips/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/Makefile
++++ b/arch/mips/Makefile
+@@ -162,7 +162,7 @@ cflags-$(CONFIG_CPU_R4X00) += -march=r46
+ cflags-$(CONFIG_CPU_TX49XX) += -march=r4600 -Wa,--trap
+ cflags-$(CONFIG_CPU_MIPS32_R1) += $(call cc-option,-march=mips32,-mips32 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
+ -Wa,-mips32 -Wa,--trap
+-cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
++cflags-$(CONFIG_CPU_MIPS32_R2) += $(call cc-option,-march=mips32r2 -mtune=34kc,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) \
+ -Wa,-mips32r2 -Wa,--trap
+ cflags-$(CONFIG_CPU_MIPS32_R6) += -march=mips32r6 -Wa,--trap -modd-spreg
+ cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) \