Changes in Platform

194a8352 - MIPS: Loongson: Move arch cflags to MIPS top level Makefile

Tue, 04 Apr 2023 09:33:47 +0000

MIPS: Loongson: Move arch cflags to MIPS top level MakefileArch cflags should be independent to Platform.Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/loongson2ef/Platform

337ff6bb - MIPS: Prefer cc-option for additions to cflags

Thu, 12 Jan 2023 03:05:00 +0000

MIPS: Prefer cc-option for additions to cflagsA future change will switch as-option to use KBUILD_AFLAGS instead ofKBUILD_CFLAGS to allow clang to drop -Qunused-arguments, which may causeissues if the flag being tested requires a flag previously added toKBUILD_CFLAGS but not KBUILD_AFLAGS. Use cc-option for cflags additionsso that the flags are tested properly.Signed-off-by: Nathan Chancellor Acked-by: Thomas Bogendoerfer Reviewed-by: Nick Desaulniers Reviewed-by: Philippe Mathieu-Daudé Tested-by: Linux Kernel Functional Testing Tested-by: Anders Roxell Signed-off-by: Masahiro Yamada List of files: /linux-6.15/arch/mips/loongson2ef/Platform

d49fc692 - MIPS: Loongson{2ef,64}: Wrap -mno-branch-likely with cc-option

Tue, 25 Jan 2022 22:19:25 +0000

MIPS: Loongson{2ef,64}: Wrap -mno-branch-likely with cc-optionThis flag is not supported by clang, which results in a warning: clang-14: warning: argument unused during compilation: '-mno-branch-likely' [-Wunused-command-line-argument]This breaks cc-option, which adds -Werror to make this warning fatal andcatch flags that are not supported.Wrap this flag in cc-option so that it does not cause cc-option to fail,which can cause randconfigs to be really noisy, due to warnings notgetting disabled that should be.Additionally, move the cc-option check to Kconfig so that the check isdone at configuration time, rather than build time, as builds with noconfiguration change will be quicker because the cc-option call will notneed to happen in those instances.Suggested-by: Nick Desaulniers Signed-off-by: Nathan Chancellor Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/loongson2ef/Platform

13ceb48b - MIPS: Loongson2ef: Remove unnecessary {as,cc}-option calls

Tue, 07 Dec 2021 17:59:51 +0000

MIPS: Loongson2ef: Remove unnecessary {as,cc}-option callsWhen building with LLVM's integrated assembler, the build errors becauseit does not implement -mfix-loongson2f-{jump,nop}:arch/mips/loongson2ef/Platform:36: *** only binutils >= 2.20.2 have needed option -mfix-loongson2f-nop. Stop.The error is a little misleading because binutils are not being used inthis case.To clear this up, remove the as-option calls because binutils 2.23 isthe minimum supported version for building the kernel. At the same time,remove the cc-option calls for the '-march=' flags, as GCC 5.1.0 is theminimum supported version.This change will not fix the LLVM build for CONFIG_CPU_LOONGSON2{E,F},as it does not implement the loongson2{e,f} march arguments (nor r4600,so it will error prior to this change) nor the assembler flags mentionedabove but it will make the errors more obvious.Link: https://github.com/ClangBuiltLinux/linux/issues/1529Reported-by: Ryutaroh Matsumoto Signed-off-by: Nathan Chancellor Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/loongson2ef/Platform

b13812dd - MIPS: Loongson2ef: Disable Loongson MMI instructions

Wed, 23 Sep 2020 10:33:12 +0000

MIPS: Loongson2ef: Disable Loongson MMI instructionsIt was missed when I was forking Loongson2ef from Loongson64 butshould be applied to Loongson2ef as march=loongson2fwill also enable Loongson MMI in GCC-9+.Signed-off-by: Jiaxun Yang Fixes: 71e2f4dd5a65 ("MIPS: Fork loongson2ef from loongson64")Reported-by: Thomas Bogendoerfer Cc: stable@vger.kernel.org # v5.8+Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/loongson2ef/Platform

2984b3f8 - MIPS: Loongson-2EF: disable fix-loongson3-llsc in compiler

Thu, 11 Jun 2020 09:59:24 +0000

MIPS: Loongson-2EF: disable fix-loongson3-llsc in compilerFirstly, Loongson-2EF support ll/sc instructions, butdoesn't need fix-loongson3-llsc compile option.Secondly, fix-loongson3-llsc will cause kernel startupfail at futex_init, because compiler will add 'sync' before'll', which will affect __ex_table.futex_init will pass NULL uaddr parameter tofutex_atomic_cmpxchg_inatomic.futex_atomic_cmpxchg_inatomic will access uaddr directly,which will cause page fault exception, the exception should behandled by __ex_table's nextinsn if the exception insn exsit in__ex_table. Because __ex_table is affected by compiler,the exception can not be handled, andfutex_atomic_cmpxchg_inatomic will crash.Error code as below:__ex_table.insn = 1b, which is 'sync' compiled withfix-loongson3-llsc, but the actual exception instrction is ll.So, do_page_fault will not find the correct inst in __ex_table, andcan not handle this exception. "1: "user_ll("%1", "%3")" \n" " bne %1, %z4, 3f \n" " .set pop \n" " move $1, %z5 \n" " .set "MIPS_ISA_ARCH_LEVEL" \n" "2: "user_sc("$1", "%2")" \n" " beqz $1, 1b \n" "3: " __SYNC_ELSE(full, loongson3_war, __WEAK_LLSC_MB) "\n" " .insn \n" " .set pop \n" " .section .fixup,\"ax\" \n" "4: li %0, %6 \n" " j 3b \n" " .previous \n" " .section __ex_table,\"a\" \n" " "__UA_ADDR "\t1b, 4b \n" " "__UA_ADDR "\t2b, 4b \n" " .previousSigned-off-by: Lichao Liu Reviewed-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/loongson2ef/Platform

26bff9eb - MIPS: Only include the platform file needed

Wed, 06 May 2020 16:24:02 +0000

MIPS: Only include the platform file neededInstead of including all Platform files, we simply include theneeded one and avoid clashes with makefile variables.Signed-off-by: Thomas Bogendoerfer List of files: /linux-6.15/arch/mips/loongson2ef/Platform

71e2f4dd - MIPS: Fork loongson2ef from loongson64

Sun, 20 Oct 2019 14:43:14 +0000

MIPS: Fork loongson2ef from loongson64As later model of GSx64 family processors including 2-series-soc havesimilar design with initial loongson3a while loongson2e/f seems lessidentical, we separate loongson2e/f support code out of mach-loongson64to make our life easier.This patch contains mostly file moving works.Signed-off-by: Jiaxun Yang [paulburton@kernel.org: Squash in the MAINTAINERS updates]Signed-off-by: Paul Burton Cc: linux-mips@vger.kernel.orgCc: paul.burton@mips.com List of files: /linux-6.15/arch/mips/loongson2ef/Platform