mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 07:40:53 +07:00
3896c324bb
commit 5373ae67c3aad1ab306cc722b5a80b831eb4d4d1 upstream. From version 2.35, binutils can be configured with --enable-mips-fix-loongson3-llsc=yes, which means it defaults to -mfix-loongson3-llsc. This breaks labels which might then point at the wrong instruction. The workaround to explicitly pass -mno-fix-loongson3-llsc has been added in Linux version 5.1, but is only enabled when building a Loongson 64 kernel. As vendors might use a common toolchain for building Loongson and non-Loongson kernels, just move that workaround to arch/mips/Makefile. At the same time update the comments to reflect the current status. Cc: stable@vger.kernel.org # 5.1+ Cc: YunQiang Su <syq@debian.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
38 lines
1.3 KiB
Plaintext
38 lines
1.3 KiB
Plaintext
#
|
|
# Loongson Processors' Support
|
|
#
|
|
|
|
|
|
cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap
|
|
|
|
#
|
|
# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
|
|
# as MIPS64 R2; older versions as just R1. This leaves the possibility open
|
|
# that GCC might generate R2 code for -march=loongson3a which then is rejected
|
|
# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a
|
|
# can't easily be used safely within the kbuild framework.
|
|
#
|
|
ifeq ($(call cc-ifversion, -ge, 0409, y), y)
|
|
ifeq ($(call ld-ifversion, -ge, 225000000, y), y)
|
|
cflags-$(CONFIG_CPU_LOONGSON64) += \
|
|
$(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
|
|
else
|
|
cflags-$(CONFIG_CPU_LOONGSON64) += \
|
|
$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
|
|
endif
|
|
else
|
|
cflags-$(CONFIG_CPU_LOONGSON64) += \
|
|
$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
|
|
endif
|
|
|
|
# Some -march= flags enable MMI instructions, and GCC complains about that
|
|
# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
|
|
cflags-y += $(call cc-option,-mno-loongson-mmi)
|
|
|
|
#
|
|
# Loongson Machines' Support
|
|
#
|
|
|
|
cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely
|
|
load-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000
|