Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v7.0.10 2026-02-14T20:47:15+00:00 2026-02-14T20:47:15+00:00 Linus Torvalds torvalds@linux-foundation.org 2026-02-14T20:47:15+00:00 urn:sha1:64275e9fda3702bfb5ab3b95f7c2b9b414667164 Pull LoongArch updates from Huacai Chen: - Select HAVE_CMPXCHG_{LOCAL,DOUBLE} - Add 128-bit atomic cmpxchg support - Add HOTPLUG_SMT implementation - Wire up memfd_secret system call - Fix boot errors and unwind errors for KASAN - Use BPF prog pack allocator and add BPF arena support - Update dts files to add nand controllers - Some bug fixes and other small changes * tag 'loongarch-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: LoongArch: dts: loongson-2k1000: Add nand controller support LoongArch: dts: loongson-2k0500: Add nand controller support LoongArch: BPF: Implement bpf_addr_space_cast instruction LoongArch: BPF: Implement PROBE_MEM32 pseudo instructions LoongArch: BPF: Use BPF prog pack allocator LoongArch: Use IS_ERR_PCPU() macro for KGDB LoongArch: Rework KASAN initialization for PTW-enabled systems LoongArch: Disable instrumentation for setup_ptwalker() LoongArch: Remove some extern variables in source files LoongArch: Guard percpu handler under !CONFIG_PREEMPT_RT LoongArch: Handle percpu handler address for ORC unwinder LoongArch: Use %px to print unmodified unwinding address LoongArch: Prefer top-down allocation after arch_mem_init() LoongArch: Add HOTPLUG_SMT implementation LoongArch: Make cpumask_of_node() robust against NUMA_NO_NODE LoongArch: Wire up memfd_secret system call LoongArch: Replace seq_printf() with seq_puts() for simple strings LoongArch: Add 128-bit atomic cmpxchg support LoongArch: Add detection for SC.Q support LoongArch: Select HAVE_CMPXCHG_LOCAL in Kconfig 2026-02-10T11:31:06+00:00 George Guo dongtai.guo@linux.dev 2026-02-10T11:31:06+00:00 urn:sha1:48543c4283e76d561d11b9955222b1a3054abdb9 Check the CPUCFG2_SCQ bit to determine if the current CPU supports the SC.Q instruction. Reviewed-by: Hengqi Chen <hengqi.chen@gmail.com> Tested-by: Hengqi Chen <hengqi.chen@gmail.com> Co-developed-by: Yangyang Lian <lianyangyang@kylinos.cn> Signed-off-by: Yangyang Lian <lianyangyang@kylinos.cn> Signed-off-by: George Guo <guodongtai@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2026-02-06T01:28:01+00:00 Bibo Mao maobibo@loongson.cn 2026-02-06T01:28:01+00:00 urn:sha1:9b486cdd032a90032c6b567ea723595205ca2626 Feature KVM_FEATURE_PREEMPT is added to show whether vCPU is preempted or not. It is to help guest OS scheduling or lock checking etc. Here add KVM_FEATURE_PREEMPT feature and use one byte as preempted flag in the steal time structure. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2025-12-12T17:44:03+00:00 Linus Torvalds torvalds@linux-foundation.org 2025-12-12T17:44:03+00:00 urn:sha1:9551a26f17d9445eed497bd7c639d48dfc3c0af4 Pull LoongArch updates from Huacai Chen: - Add basic LoongArch32 support Note: Build infrastructures of LoongArch32 are not enabled yet, because we need to adjust irqchip drivers and wait for GNU toolchain be upstream first. - Select HAVE_ARCH_BITREVERSE in Kconfig - Fix build and boot for CONFIG_RANDSTRUCT - Correct the calculation logic of thread_count - Some bug fixes and other small changes * tag 'loongarch-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (22 commits) LoongArch: Adjust default config files for 32BIT/64BIT LoongArch: Adjust VDSO/VSYSCALL for 32BIT/64BIT LoongArch: Adjust misc routines for 32BIT/64BIT LoongArch: Adjust user accessors for 32BIT/64BIT LoongArch: Adjust system call for 32BIT/64BIT LoongArch: Adjust module loader for 32BIT/64BIT LoongArch: Adjust time routines for 32BIT/64BIT LoongArch: Adjust process management for 32BIT/64BIT LoongArch: Adjust memory management for 32BIT/64BIT LoongArch: Adjust boot & setup for 32BIT/64BIT LoongArch: Adjust common macro definitions for 32BIT/64BIT LoongArch: Add adaptive CSR accessors for 32BIT/64BIT LoongArch: Add atomic operations for 32BIT/64BIT LoongArch: Add new PCI ID for pci_fixup_vgadev() LoongArch: Add and use some macros for AVEC LoongArch: Correct the calculation logic of thread_count LoongArch: Use unsigned long for _end and _text LoongArch: Use __pmd()/__pte() for swap entry conversions LoongArch: Fix arch_dup_task_struct() for CONFIG_RANDSTRUCT LoongArch: Fix build errors for CONFIG_RANDSTRUCT ... 2025-12-08T10:09:17+00:00 Huacai Chen chenhuacai@loongson.cn 2025-12-08T10:09:17+00:00 urn:sha1:14338e631afd6d4b2c2f8fb7deba786d86c40fad Adjust system call for both 32BIT and 64BIT, including: add the uapi unistd_{32,64}.h and syscall_table_{32,64}.h inclusion, add sys_mmap2() definition, change the system call entry routines, etc. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2025-12-08T10:09:17+00:00 Huacai Chen chenhuacai@loongson.cn 2025-12-08T10:09:17+00:00 urn:sha1:4ad04e7c7eed8583bd49509f4aad4d28bc4b399d Adjust process management for both 32BIT and 64BIT, including: CPU context switching, FPU loading/restoring, process dumping and process tracing routines. Q: Why modify switch.S? A: LoongArch32 has no ldptr.d/stptr.d instructions, and asm offsets of thead_struct members are too large to be filled in the 12b immediate field of ld.w/st.w. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2025-11-27T03:00:18+00:00 Song Gao gaosong@loongson.cn 2025-11-27T03:00:18+00:00 urn:sha1:7bcd8d0b2237fd0f698bcd0c90badf7c46270d9b Check whether the host CPU supported AVEC, and save/restore CSR_MSGIS0- CSR_MSGIS3 when necessary. Reviewed-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Song Gao <gaosong@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2025-11-20T06:42:05+00:00 Thomas Weißschuh linux@weissschuh.net 2025-11-20T06:42:05+00:00 urn:sha1:20d7338f2d3bcb570068dd6d39b16f1a909fe976 The kernel UAPI headers already contain fixed-width integer types, there is no need to rely on the libc types. There may not be a libc available or the libc may not provides the <stdint.h>, like for example on nolibc. This also aligns the header with the rest of the LoongArch UAPI headers. Fixes: 803b0fc5c3f2 ("LoongArch: Add process management") Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2025-09-23T15:37:08+00:00 Bibo Mao maobibo@loongson.cn 2025-09-23T15:37:08+00:00 urn:sha1:7109f51bcc80b79a8f31e50fa5c96a20c54197d9 With new Loongson-3A6000/3C6000 hardware platforms (or later), hardware page table walking (PTW) feature is supported on host. So here add this feature detection on KVM host. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2025-08-20T14:23:16+00:00 Ming Wang wangming01@loongson.cn 2025-08-20T14:23:16+00:00 urn:sha1:f7794a4d92ade518c813de69a01b27ca6d8d86f3 The default COMMAND_LINE_SIZE of 512, inherited from asm-generic, is too small for modern use cases. For example, kdump configurations or extensive debugging parameters can easily exceed this limit. Therefore, increase the command line size to 4096 bytes, aligning LoongArch with the MIPS architecture. This change follows a broader trend among architectures to raise this limit to support modern needs; for instance, PowerPC increased its value for similar reasons in the commit a5980d064fe2 ("powerpc: Bump COMMAND_LINE_SIZE to 2048"). Similar to the change made for RISC-V in the commit 61fc1ee8be26 ("riscv: Bump COMMAND_LINE_SIZE value to 1024"), this is considered a safe change. The broader kernel community has reached a consensus that modifying COMMAND_LINE_SIZE from UAPI headers does not constitute a uABI breakage, as well-behaved userspace applications should not rely on this macro. Suggested-by: Huang Cun <cunhuang@tencent.com> Signed-off-by: Ming Wang <wangming01@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>