linux/arch/loongarch/include/uapi, branch master

LoongArch: KVM: Add DMSINTC device support

2026-04-09T10:56:37Z

Add device model for DMSINTC interrupt controller, implement basic create/destroy/set_attr interfaces, and register device model to kvm device table. Reviewed-by: Bibo Mao Signed-off-by: Song Gao Signed-off-by: Huacai Chen

Merge tag 'loongarch-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

2026-02-14T20:47:15Z

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

LoongArch: Add detection for SC.Q support

2026-02-10T11:31:06Z

Check the CPUCFG2_SCQ bit to determine if the current CPU supports the SC.Q instruction. Reviewed-by: Hengqi Chen Tested-by: Hengqi Chen Co-developed-by: Yangyang Lian Signed-off-by: Yangyang Lian Signed-off-by: George Guo Signed-off-by: Huacai Chen

LoongArch: KVM: Add paravirt preempt feature in hypervisor side

2026-02-06T01:28:01Z

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 Signed-off-by: Huacai Chen

Merge tag 'loongarch-6.19' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson

2025-12-12T17:44:03Z

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 ...

LoongArch: Adjust system call for 32BIT/64BIT

2025-12-08T10:09:17Z

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 Signed-off-by: Jiaxun Yang Signed-off-by: Huacai Chen

LoongArch: Adjust process management for 32BIT/64BIT

2025-12-08T10:09:17Z

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 Signed-off-by: Jiaxun Yang Signed-off-by: Huacai Chen

LoongArch: KVM: Add AVEC basic support

2025-11-27T03:00:18Z

Check whether the host CPU supported AVEC, and save/restore CSR_MSGIS0- CSR_MSGIS3 when necessary. Reviewed-by: Bibo Mao Signed-off-by: Song Gao Signed-off-by: Huacai Chen

LoongArch: Use UAPI types in ptrace UAPI header

2025-11-20T06:42:05Z

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 , 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 Signed-off-by: Huacai Chen

LoongArch: KVM: Add PTW feature detection on new hardware

2025-09-23T15:37:08Z

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 Signed-off-by: Huacai Chen