Changes in Kconfig

fb8e9f59 - LoongArch: Select ARCH_USE_MEMTEST

Thu, 24 Apr 2025 12:15:22 +0000

LoongArch: Select ARCH_USE_MEMTESTAs of commit dce44566192e ("mm/memtest: add ARCH_USE_MEMTEST"),architectures must select ARCH_USE_MEMTESET to enable CONFIG_MEMTEST.Commit 628c3bb40e9a ("LoongArch: Add boot and setup routines") addedsupport for early_memtest but did not select ARCH_USE_MEMTESET.Fixes: 628c3bb40e9a ("LoongArch: Add boot and setup routines")Tested-by: Erpeng Xu Tested-by: Yuli Wang Signed-off-by: Yuli Wang Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

be216cbc - LoongArch: Fix help text of CMDLINE_EXTEND in Kconfig

Sun, 30 Mar 2025 08:31:09 +0000

LoongArch: Fix help text of CMDLINE_EXTEND in KconfigIt is the built-in command line appended to the bootloader command line,not the bootloader command line appended to the built-in command line.Fixes: fa96b57c1490 ("LoongArch: Add build infrastructure")Signed-off-by: 谢致邦 (XIE Zhibang) Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

892a7963 - LoongArch: Enable UBSAN (Undefined Behavior Sanitizer)

Sun, 30 Mar 2025 08:31:08 +0000

LoongArch: Enable UBSAN (Undefined Behavior Sanitizer)Select ARCH_HAS_UBSAN in order to allow the user to enable CONFIG_UBSANand instrument the entire kernel for ubsan checks.Co-developed-by: Wentao Guan Signed-off-by: Wentao Guan Signed-off-by: Yuli Wang Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

08dac3b8 - LoongArch: Always select HAVE_VIRT_CPU_ACCOUNTING_GEN

Sun, 30 Mar 2025 08:30:20 +0000

LoongArch: Always select HAVE_VIRT_CPU_ACCOUNTING_GENOption HAVE_VIRT_CPU_ACCOUNTING_GEN is selected by default for 64bitsystem in kconfig file arch/Kconfig. There is another selection in filearch/loongarch/Kconfig if SMP is not selected. Indeed this option isSMP-safe so it brings out some misunderstanding for non-SMP case. Herealways select option HAVE_VIRT_CPU_ACCOUNTING_GEN for future possible32bit system (it is also 32bit-safe because we no longer use cputime_t).Signed-off-by: Bibo Mao Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

e20ab7d4 - LoongArch: Enable jump table for objtool

Tue, 17 Dec 2024 01:09:03 +0000

LoongArch: Enable jump table for objtoolFor now, it is time to remove -fno-jump-tables to enable jump table forobjtool if the compiler has -mannotate-tablejump, otherwise it is betterto remain -fno-jump-tables to keep compatibility with older compilers.Signed-off-by: Tiezhu Yang Link: https://lore.kernel.org/r/20241217010905.13054-8-yangtiezhu@loongson.cnAcked-by: Huacai Chen Signed-off-by: Josh Poimboeuf List of files: /linux-6.15/arch/loongarch/Kconfig

d2862bb9 - LoongArch: vDSO: Switch to generic storage implementation

Tue, 04 Feb 2025 12:05:42 +0000

LoongArch: vDSO: Switch to generic storage implementationThe generic storage implementation provides the same features as thecustom one. However it can be shared between architectures, makingmaintenance easier.Co-developed-by: Nam Cao Signed-off-by: Nam Cao Signed-off-by: Thomas Weißschuh Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250204-vdso-store-rng-v3-10-13a4669dfc8c@linutronix.de List of files: /linux-6.15/arch/loongarch/Kconfig

341cf992 - LoongArch: Disable FIX_EARLYCON_MEM when ARCH_IOREMAP is enabled

Sat, 25 Jan 2025 10:51:33 +0000

LoongArch: Disable FIX_EARLYCON_MEM when ARCH_IOREMAP is enabledWhen ARCH_IOREMAP is enabled, we are using always accessible DMW forioremap(). It makes no sense to create a dedicated mapping for earlycongiven that we can access the region via DMW.Disable FIX_EARLYCON_MEM when ARCH_IOREMAP is selected. This can easedebugging for early mapping issues.Signed-off-by: Jiaxun Yang Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

c91ddab5 - LoongArch: Migrate to the generic rule for built-in DTB

Sat, 25 Jan 2025 10:51:33 +0000

LoongArch: Migrate to the generic rule for built-in DTBCommit 654102df2ac2 ("kbuild: add generic support for built-in bootDTBs") introduced generic support for built-in DTBs.Select GENERIC_BUILTIN_DTB when built-in DTB support is enabled.Signed-off-by: Masahiro Yamada Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

558aff7a - EDAC: Add an EDAC driver for the Loongson memory controller

Thu, 19 Dec 2024 12:48:46 +0000

EDAC: Add an EDAC driver for the Loongson memory controllerAdd ECC support for Loongson SoC DDR controller. This driver reports singlebit errors (CE) only.Only ACPI firmware is supported. [ bp: Document what last_ce_count is for. ]Signed-off-by: Zhao Qunqin Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Huacai Chen Link: https://lore.kernel.org/r/20241219124846.1876-1-zhaoqunqin@loongson.cnSigned-off-by: Borislav Petkov (AMD) List of files: /linux-6.15/arch/loongarch/Kconfig

a762e926 - ftrace: Add CONFIG_HAVE_FTRACE_GRAPH_FUNC

Thu, 26 Dec 2024 05:13:34 +0000

ftrace: Add CONFIG_HAVE_FTRACE_GRAPH_FUNCAdd CONFIG_HAVE_FTRACE_GRAPH_FUNC kconfig in addition to ftrace_graph_funcmacro check. This is for the other feature (e.g. FPROBE) which requires toaccess ftrace_regs from fgraph_ops::entryfunc() can avoid compiling ifthe fgraph can not pass the valid ftrace_regs.Signed-off-by: Masami Hiramatsu (Google) Cc: Catalin Marinas Cc: Alexei Starovoitov Cc: Florent Revest Cc: Martin KaFai Lau Cc: bpf Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Alan Maguire Cc: Mark Rutland Cc: Will Deacon Cc: Huacai Chen Cc: WANG Xuerui Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: Naveen N Rao Cc: Madhavan Srinivasan Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.orgCc: "H. Peter Anvin" Cc: Mathieu Desnoyers Link: https://lore.kernel.org/173519001472.391279.1174901685282588467.stgit@devnote2Signed-off-by: Steven Rostedt (Google) List of files: /linux-6.15/arch/loongarch/Kconfig

762abbc0 - fprobe: Use ftrace_regs in fprobe exit handler

Thu, 26 Dec 2024 05:12:31 +0000

fprobe: Use ftrace_regs in fprobe exit handlerChange the fprobe exit handler to use ftrace_regs structure instead ofpt_regs. This also introduce HAVE_FTRACE_REGS_HAVING_PT_REGS whichmeans the ftrace_regs is including the pt_regs so that ftrace_regscan provide pt_regs without memory allocation.Fprobe introduces a new dependency with that.Signed-off-by: Masami Hiramatsu (Google) Acked-by: Heiko Carstens # s390Cc: Huacai Chen Cc: Alexei Starovoitov Cc: Florent Revest Cc: bpf Cc: Alan Maguire Cc: Heiko Carstens Cc: WANG Xuerui Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Christian Borntraeger Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.orgCc: "H. Peter Anvin" Cc: Mark Rutland Cc: Mathieu Desnoyers Cc: Song Liu Cc: Jiri Olsa Cc: KP Singh Cc: Matt Bobrowski Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: Andrii Nakryiko Cc: Martin KaFai Lau Cc: Eduard Zingerman Cc: Yonghong Song Cc: John Fastabend Cc: Stanislav Fomichev Cc: Hao Luo Cc: Andrew Morton Link: https://lore.kernel.org/173518995092.391279.6765116450352977627.stgit@devnote2Signed-off-by: Steven Rostedt (Google) List of files: /linux-6.15/arch/loongarch/Kconfig

a3ed4157 - fgraph: Replace fgraph_ret_regs with ftrace_regs

Thu, 26 Dec 2024 05:11:55 +0000

fgraph: Replace fgraph_ret_regs with ftrace_regsUse ftrace_regs instead of fgraph_ret_regs for tracing return valueon function_graph tracer because of simplifying the callback interface.The CONFIG_HAVE_FUNCTION_GRAPH_RETVAL is also replaced byCONFIG_HAVE_FUNCTION_GRAPH_FREGS.Signed-off-by: Masami Hiramatsu (Google) Acked-by: Heiko Carstens Acked-by: Will Deacon Cc: Catalin Marinas Cc: Alexei Starovoitov Cc: Florent Revest Cc: Martin KaFai Lau Cc: bpf Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Alan Maguire Cc: Mark Rutland Cc: Huacai Chen Cc: WANG Xuerui Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: Vasily Gorbik Cc: Alexander Gordeev Cc: Heiko Carstens Cc: Christian Borntraeger Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.orgCc: "H. Peter Anvin" Cc: Mathieu Desnoyers Link: https://lore.kernel.org/173518991508.391279.16635322774382197642.stgit@devnote2Signed-off-by: Steven Rostedt (Google) List of files: /linux-6.15/arch/loongarch/Kconfig

72f51a4f - loongarch/crc32: expose CRC32 functions through lib

Mon, 02 Dec 2024 01:08:31 +0000

loongarch/crc32: expose CRC32 functions through libMove the loongarch CRC32 assembly code into the lib directory and wireit up to the library interface. This allows it to be used without goingthrough the crypto API. It remains usable via the crypto API too viathe shash algorithms that use the library interface. Thus all thearch-specific "shash" code becomes unnecessary and is removed.Note: to see the diff from arch/loongarch/crypto/crc32-loongarch.c toarch/loongarch/lib/crc32-loongarch.c, view this commit with'git show -M10'.Reviewed-by: Ard Biesheuvel Reviewed-by: WangYuli Link: https://lore.kernel.org/r/20241202010844.144356-7-ebiggers@kernel.orgSigned-off-by: Eric Biggers List of files: /linux-6.15/arch/loongarch/Kconfig

704f06ee - LoongArch: Allow to enable PREEMPT_LAZY

Fri, 22 Nov 2024 07:47:53 +0000

LoongArch: Allow to enable PREEMPT_LAZYLoongArch has supported PREEMPT_RT now. It uses GENERIC_ENTRY, so justadd the TIF bit (TIF_NEED_RESCHED_LAZY) related definitions and selectthe Kconfig symbol (ARCH_HAS_PREEMPT_LAZY) is enough to make it go.Signed-off-by: Xi Ruoyao Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

be2ea982 - LoongArch: Allow to enable PREEMPT_RT

Fri, 22 Nov 2024 07:47:53 +0000

LoongArch: Allow to enable PREEMPT_RTIt is really time.LoongArch has all the required architecture related changes, that havebeen identified over time, in order to enable PREEMPT_RT. With the recentprintk changes, the last known road block has been addressed.Allow to enable PREEMPT_RT on LoongArch.Below are the latency data from cyclictest on a 4-core Loongson-3A5000machine, with a "make -j8" kernel building workload in the background.1. PREEMPT kernel with default configuration:./cyclictest -a -t -m -i200 -d0 -p99policy: fifo: loadavg: 8.78 8.96 8.64 10/296 64800T: 0 ( 4592) P:99 I:200 C:14838617 Min: 3 Act: 6 Avg: 8 Max: 844T: 1 ( 4593) P:99 I:200 C:14838765 Min: 3 Act: 9 Avg: 8 Max: 909T: 2 ( 4594) P:99 I:200 C:14838510 Min: 3 Act: 7 Avg: 8 Max: 832T: 3 ( 4595) P:99 I:200 C:14838631 Min: 3 Act: 8 Avg: 8 Max: 9312. PREEMPT_RT kernel with default configuration:./cyclictest -a -t -m -i200 -d0 -p99policy: fifo: loadavg: 10.38 10.47 10.35 9/336 77788T: 0 ( 3941) P:99 I:200 C:19439626 Min: 3 Act: 12 Avg: 8 Max: 227T: 1 ( 3942) P:99 I:200 C:19439624 Min: 2 Act: 11 Avg: 8 Max: 184T: 2 ( 3943) P:99 I:200 C:19439623 Min: 3 Act: 4 Avg: 7 Max: 223T: 3 ( 3944) P:99 I:200 C:19439623 Min: 2 Act: 10 Avg: 7 Max: 2263. PREEMPT_RT kernel with tuned configuration:./cyclictest -a -t -m -i200 -d0 -p99policy: fifo: loadavg: 10.52 10.66 10.62 12/334 109397T: 0 ( 4765) P:99 I:200 C:29335186 Min: 3 Act: 6 Avg: 8 Max: 62T: 1 ( 4766) P:99 I:200 C:29335185 Min: 3 Act: 10 Avg: 8 Max: 52T: 2 ( 4767) P:99 I:200 C:29335184 Min: 3 Act: 8 Avg: 8 Max: 64T: 3 ( 4768) P:99 I:200 C:29335183 Min: 3 Act: 12 Avg: 8 Max: 53Main instruments of tuned configuration include: Disable the boot romspace in BIOS, in order to avoid kernel's speculative access to low-speed memory (i.e. boot rom space); Disable CPUFreq scaling; DisableRTC synchronization in the ntpd/chronyd service (also avoid other RTCaccesses when running low-latency workloads).Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

826d2af6 - LoongArch: Select HAVE_POSIX_CPU_TIMERS_TASK_WORK

Fri, 22 Nov 2024 07:47:53 +0000

LoongArch: Select HAVE_POSIX_CPU_TIMERS_TASK_WORKMove POSIX CPU timer expiry and signal delivery into task context toallow PREEMPT_RT setups to coexist with KVM.Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

31daa343 - crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32

Tue, 17 Sep 2024 16:37:20 +0000

crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32Fixes boot failures on 6.9 on PPC_BOOK3S_32 machines using Open Firmware. On these machines, the kernel refuses to boot from non-zeroPHYSICAL_START, which occurs when CRASH_DUMP is on.Since most PPC_BOOK3S_32 machines boot via Open Firmware, it shoulddefault to off for them. Users booting via some other mechanism can stillturn it on explicitly.Does not change the default on any other architectures for thetime being.Link: https://lkml.kernel.org/r/20240917163720.1644584-1-dave@vasilevsky.caFixes: 75bc255a7444 ("crash: clean up kdump related config items")Signed-off-by: Dave Vasilevsky Reported-by: Reimar Döffinger Closes: https://lists.debian.org/debian-powerpc/2024/07/msg00001.htmlAcked-by: Michael Ellerman [powerpc]Acked-by: Baoquan He Cc: "Eric W. Biederman" Cc: John Paul Adrian Glaubitz Cc: Reimar Döffinger Cc: Signed-off-by: Andrew Morton List of files: /linux-6.15/arch/loongarch/Kconfig

f04de6d8 - LoongArch: Add ARCH_HAS_SET_DIRECT_MAP support

Tue, 24 Sep 2024 07:32:20 +0000

LoongArch: Add ARCH_HAS_SET_DIRECT_MAP supportAdd set_direct_map_*() functions for setting the direct map alias forthe page to its default permissions and to an invalid state that cannotbe cached in a TLB. (See d253ca0c3 ("x86/mm/cpa: Add set_direct_map_*()functions")) Add a similar implementation for LoongArch.This fixes the KFENCE warnings during hibernation: ================================================================== BUG: KFENCE: invalid read in swsusp_save+0x368/0x4d8 Invalid read at 0x00000000f7b89a3c: swsusp_save+0x368/0x4d8 hibernation_snapshot+0x3f0/0x4e0 hibernate+0x20c/0x440 state_store+0x128/0x140 kernfs_fop_write_iter+0x160/0x260 vfs_write+0x2c0/0x520 ksys_write+0x74/0x160 do_syscall+0xb0/0x160 CPU: 0 UID: 0 PID: 812 Comm: bash Tainted: G B 6.11.0-rc1+ #1566 Tainted: [B]=BAD_PAGE Hardware name: Loongson-LS3A5000-7A1000-1w-CRB, BIOS vUDK2018-LoongArch-V2.0.0 10/21/2022 ==================================================================Note: We can only set permissions for KVRANGE/XKVRANGE kernel addresses.Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

e86935f7 - LoongArch: Add ARCH_HAS_SET_MEMORY support

Tue, 24 Sep 2024 07:32:20 +0000

LoongArch: Add ARCH_HAS_SET_MEMORY supportAdd set_memory_ro/rw/x/nx architecture hooks to change the pageattribution.Use own set_memory.h rather than generic set_memory.h (i.e.include/asm-generic/set_memory.h), because we want to add other functionprototypes here.Note: We can only set attributes for KVRANGE/XKVRANGE kernel addresses.Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig

e8dd556c - LoongArch: Enable generic CPU vulnerabilites support

Tue, 24 Sep 2024 07:31:51 +0000

LoongArch: Enable generic CPU vulnerabilites supportCurrently, many architectures support generic CPU vulnerabilites, suchas x86, arm64 and riscv: commit 61dc0f555b5c ("x86/cpu: Implement CPU vulnerabilites sysfs functions") commit 61ae1321f06c ("arm64: enable generic CPU vulnerabilites support") commit 0e3f3649d44b ("riscv: Enable generic CPU vulnerabilites support")All LoongArch CPUs (since Loongson-3A5000) implement a special mechanismin the processor core to prevent "Meltdown" and "Spectre" attacks, so itcan enable generic CPU vulnerabilites support for LoongArch too.Without this patch, there are no user interfaces of vulnerabilities tocheck on LoongArch. The output of those files reflects the state of theCPUs in the system, the output value "Not affected" means "CPU is notaffected by the vulnerability".Before: # cat /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow cat: /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow: No such file or directory # cat /sys/devices/system/cpu/vulnerabilities/spec_store_bypass cat: /sys/devices/system/cpu/vulnerabilities/spec_store_bypass: No such file or directory # cat /sys/devices/system/cpu/vulnerabilities/meltdown cat: /sys/devices/system/cpu/vulnerabilities/meltdown: No such file or directoryAfter: # cat /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow Not affected # cat /sys/devices/system/cpu/vulnerabilities/spec_store_bypass Not affected # cat /sys/devices/system/cpu/vulnerabilities/meltdown Not affectedLink: https://www.loongson.cn/EN/news/show?id=633Signed-off-by: Tiezhu Yang Signed-off-by: Huacai Chen List of files: /linux-6.15/arch/loongarch/Kconfig