LLVM toolchain does not support most of workarounds, detect those supports in Kconfig so we can hide unsupported workarounds to user. Link: https://github.com/ClangBuiltLinux/linux/issues/1544 Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> Reviewed-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx> --- arch/mips/Kconfig | 28 +++++++++++++++++++++++++--- arch/mips/Makefile | 6 +++--- arch/mips/cavium-octeon/Kconfig | 1 + 3 files changed, 29 insertions(+), 6 deletions(-) diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0b270562c3eb..0cd9cd01b7ab 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -371,9 +371,9 @@ config MACH_DECSTATION select CEVT_R4K if CPU_R4X00 select CSRC_IOASIC select CSRC_R4K if CPU_R4X00 - select CPU_DADDI_WORKAROUNDS if 64BIT - select CPU_R4000_WORKAROUNDS if 64BIT - select CPU_R4400_WORKAROUNDS if 64BIT + imply CPU_DADDI_WORKAROUNDS + imply CPU_R4000_WORKAROUNDS + imply CPU_R4400_WORKAROUNDS select DMA_NONCOHERENT select NO_IOPORT_MAP select IRQ_MIPS_CPU @@ -1723,6 +1723,7 @@ config CPU_JUMP_WORKAROUNDS config CPU_LOONGSON2F_WORKAROUNDS bool "Loongson 2F Workarounds" default y + depends on AS_HAS_NOP_WORKAROUNDS && AS_HAS_JUMP_WORKAROUNDS select CPU_NOP_WORKAROUNDS select CPU_JUMP_WORKAROUNDS help @@ -2457,6 +2458,7 @@ config CPU_HAS_SYNC # "MIPS R4400MC Errata, Processor Revision 1.0", erratum #5 config CPU_DADDI_WORKAROUNDS bool + depends on CPU_R4X00_BUGS64 && CC_HAS_DADDI_WORKAROUNDS # Work around certain R4000 CPU errata (as implemented by GCC): # @@ -2478,6 +2480,7 @@ config CPU_DADDI_WORKAROUNDS # erratum #52 config CPU_R4000_WORKAROUNDS bool + depends on CPU_R4X00_BUGS64 && CC_HAS_R4000_WORKAROUNDS select CPU_R4400_WORKAROUNDS # Work around certain R4400 CPU errata (as implemented by GCC): @@ -2488,6 +2491,7 @@ config CPU_R4000_WORKAROUNDS # "MIPS R4400MC Errata, Processor Revision 2.0 & 3.0", erratum #4 config CPU_R4400_WORKAROUNDS bool + depends on CPU_R4X00_BUGS64 && CC_HAS_R4400_WORKAROUNDS config CPU_R4X00_BUGS64 bool @@ -3168,6 +3172,15 @@ config CC_HAS_MNO_BRANCH_LIKELY def_bool y depends on $(cc-option,-mno-branch-likely) +config CC_HAS_R4000_WORKAROUNDS + def_bool $(cc-option,-mfix-r4000) + +config CC_HAS_R4400_WORKAROUNDS + def_bool $(cc-option,-mfix-r4400) + +config CC_HAS_DADDI_WORKAROUNDS + def_bool $(cc-option,-mno-daddi) + # https://github.com/llvm/llvm-project/issues/61045 config CC_HAS_BROKEN_INLINE_COMPAT_BRANCH def_bool y if CC_IS_CLANG @@ -3193,6 +3206,15 @@ config AS_HAS_DSP config AS_HAS_GINV def_bool $(cc-option,-Wa$(comma)-mginv) +config AS_HAS_CN63XXP1_WORKAROUNDS + def_bool $(cc-option,-Wa$(comma)-mfix-cn63xxp1) + +config AS_HAS_NOP_WORKAROUNDS + def_bool $(cc-option,-Wa$(comma)-mfix-loongson2f-nop) + +config AS_HAS_JUMP_WORKAROUNDS + def_bool $(cc-option,-Wa$(comma)-mfix-loongson2f-jump) + menu "Power management options" config ARCH_HIBERNATION_POSSIBLE diff --git a/arch/mips/Makefile b/arch/mips/Makefile index 3aa0f9d4ceb6..344fe5f00f7b 100644 --- a/arch/mips/Makefile +++ b/arch/mips/Makefile @@ -193,9 +193,9 @@ cflags-$(CONFIG_CC_IS_CLANG) += -march=mips64r2 endif cflags-$(CONFIG_CPU_LOONGSON64) += $(call cc-option,-mno-loongson-mmi) -cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += $(call cc-option,-mfix-r4000,) -cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += $(call cc-option,-mfix-r4400,) -cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,) +cflags-$(CONFIG_CPU_R4000_WORKAROUNDS) += -mfix-r4000 +cflags-$(CONFIG_CPU_R4400_WORKAROUNDS) += -mfix-r4400 +cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += -mno-daddi ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa,-mfix-loongson2f-nop cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa,-mfix-loongson2f-jump diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig index 450e979ef5d9..38c9dc89cd5f 100644 --- a/arch/mips/cavium-octeon/Kconfig +++ b/arch/mips/cavium-octeon/Kconfig @@ -4,6 +4,7 @@ if CPU_CAVIUM_OCTEON config CAVIUM_CN63XXP1 bool "Enable CN63XXP1 errata workarounds" default "n" + depends on AS_HAS_CN63XXP1_WORKAROUNDS help The CN63XXP1 chip requires build time workarounds to function reliably, select this option to enable them. These -- 2.39.2 (Apple Git-143)
