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2023-09-27LoongArch: numa: Fix high_memory calculationHuacai Chen
For 64bit kernel without HIGHMEM, high_memory is the virtual address of the highest physical address in the system. But __va(get_num_physpages() << PAGE_SHIFT) is not what we want for high_memory because there may be holes in the physical address space. On the other hand, max_low_pfn is calculated from memblock_end_of_DRAM(), which is exactly corresponding to the highest physical address, so use it for high_memory calculation. Cc: <stable@vger.kernel.org> Fixes: d4b6f1562a3c3284adce ("LoongArch: Add Non-Uniform Memory Access (NUMA) support") Signed-off-by: Chong Qiao <qiaochong@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-20LoongArch: Set all reserved memblocks on Node#0 at initializationHuacai Chen
After commit 61167ad5fecdea ("mm: pass nid to reserve_bootmem_region()") we get a panic if DEFERRED_STRUCT_PAGE_INIT is enabled: [ 0.000000] CPU 0 Unable to handle kernel paging request at virtual address 0000000000002b82, era == 90000000040e3f28, ra == 90000000040e3f18 [ 0.000000] Oops[#1]: [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.5.0+ #733 [ 0.000000] pc 90000000040e3f28 ra 90000000040e3f18 tp 90000000046f4000 sp 90000000046f7c90 [ 0.000000] a0 0000000000000001 a1 0000000000200000 a2 0000000000000040 a3 90000000046f7ca0 [ 0.000000] a4 90000000046f7ca4 a5 0000000000000000 a6 90000000046f7c38 a7 0000000000000000 [ 0.000000] t0 0000000000000002 t1 9000000004b00ac8 t2 90000000040e3f18 t3 90000000040f0800 [ 0.000000] t4 00000000000f0000 t5 80000000ffffe07e t6 0000000000000003 t7 900000047fff5e20 [ 0.000000] t8 aaaaaaaaaaaaaaab u0 0000000000000018 s9 0000000000000000 s0 fffffefffe000000 [ 0.000000] s1 0000000000000000 s2 0000000000000080 s3 0000000000000040 s4 0000000000000000 [ 0.000000] s5 0000000000000000 s6 fffffefffe000000 s7 900000000470b740 s8 9000000004ad4000 [ 0.000000] ra: 90000000040e3f18 reserve_bootmem_region+0xec/0x21c [ 0.000000] ERA: 90000000040e3f28 reserve_bootmem_region+0xfc/0x21c [ 0.000000] CRMD: 000000b0 (PLV0 -IE -DA +PG DACF=CC DACM=CC -WE) [ 0.000000] PRMD: 00000000 (PPLV0 -PIE -PWE) [ 0.000000] EUEN: 00000000 (-FPE -SXE -ASXE -BTE) [ 0.000000] ECFG: 00070800 (LIE=11 VS=7) [ 0.000000] ESTAT: 00010800 [PIL] (IS=11 ECode=1 EsubCode=0) [ 0.000000] BADV: 0000000000002b82 [ 0.000000] PRID: 0014d000 (Loongson-64bit, Loongson-3A6000) [ 0.000000] Modules linked in: [ 0.000000] Process swapper (pid: 0, threadinfo=(____ptrval____), task=(____ptrval____)) [ 0.000000] Stack : 0000000000000000 9000000002eb5430 0000003a00000020 90000000045ccd00 [ 0.000000] 900000000470e000 90000000002c1918 0000000000000000 9000000004110780 [ 0.000000] 00000000fe6c0000 0000000480000000 9000000004b4e368 9000000004110748 [ 0.000000] 0000000000000000 900000000421ca84 9000000004620000 9000000004564970 [ 0.000000] 90000000046f7d78 9000000002cc9f70 90000000002c1918 900000000470e000 [ 0.000000] 9000000004564970 90000000040bc0e0 90000000046f7d78 0000000000000000 [ 0.000000] 0000000000004000 90000000045ccd00 0000000000000000 90000000002c1918 [ 0.000000] 90000000002c1900 900000000470b700 9000000004b4df78 9000000004620000 [ 0.000000] 90000000046200a8 90000000046200a8 0000000000000000 9000000004218b2c [ 0.000000] 9000000004270008 0000000000000001 0000000000000000 90000000045ccd00 [ 0.000000] ... [ 0.000000] Call Trace: [ 0.000000] [<90000000040e3f28>] reserve_bootmem_region+0xfc/0x21c [ 0.000000] [<900000000421ca84>] memblock_free_all+0x114/0x350 [ 0.000000] [<9000000004218b2c>] mm_core_init+0x138/0x3cc [ 0.000000] [<9000000004200e38>] start_kernel+0x488/0x7a4 [ 0.000000] [<90000000040df0d8>] kernel_entry+0xd8/0xdc [ 0.000000] [ 0.000000] Code: 02eb21ad 00410f4c 380c31ac <262b818d> 6800b70d 02c1c196 0015001c 57fe4bb1 260002cd The reason is early memblock_reserve() in memblock_init() set node id to MAX_NUMNODES, making NODE_DATA(nid) a NULL dereference in the call chain reserve_bootmem_region() -> init_reserved_page(). After memblock_init(), those late calls of memblock_reserve() operate on subregions of memblock .memory regions. As a result, these reserved regions will be set to the correct node at the first iteration of memmap_init_reserved_pages(). So set all reserved memblocks on Node#0 at initialization can avoid this panic. Reported-by: WANG Xuerui <git@xen0n.name> Tested-by: WANG Xuerui <git@xen0n.name> Reviewed-by: WANG Xuerui <git@xen0n.name> # with nits addressed Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-20LoongArch: Remove dead code in relocate_new_kernelTiezhu Yang
The initial aim is to silence the following objtool warning: arch/loongarch/kernel/relocate_kernel.o: warning: objtool: relocate_new_kernel+0x74: unreachable instruction There are two adjacent "b" instructions, the second one is unreachable, it is dead code, just remove it. Co-developed-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Jinyang He <hejinyang@loongson.cn> Co-developed-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-20LoongArch: Fix some build warnings with W=1Bibo Mao
There are some building warnings when building LoongArch kernel with W=1 as following, this patch fixes them. arch/loongarch/kernel/acpi.c:284:13: warning: no previous prototype for ‘acpi_numa_arch_fixup’ [-Wmissing-prototypes] 284 | void __init acpi_numa_arch_fixup(void) {} | ^~~~~~~~~~~~~~~~~~~~ arch/loongarch/kernel/time.c:32:13: warning: no previous prototype for ‘constant_timer_interrupt’ [-Wmissing-prototypes] 32 | irqreturn_t constant_timer_interrupt(int irq, void *data) | ^~~~~~~~~~~~~~~~~~~~~~~~ arch/loongarch/kernel/traps.c:496:25: warning: no previous prototype for 'do_fpe' [-Wmissing-prototypes] 496 | asmlinkage void noinstr do_fpe(struct pt_regs *regs | ^~~~~~ arch/loongarch/kernel/traps.c:813:22: warning: variable ‘opcode’ set but not used [-Wunused-but-set-variable] 813 | unsigned int opcode; | ^~~~~~ arch/loongarch/kernel/signal.c:895:14: warning: no previous prototype for ‘get_sigframe’ [-Wmissing-prototypes] 895 | void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, | ^~~~~~~~~~~~ arch/loongarch/kernel/syscall.c:21:40: warning: initialized field overwritten [-Woverride-init] 21 | #define __SYSCALL(nr, call) [nr] = (call), | ^ arch/loongarch/kernel/syscall.c:40:14: warning: no previous prototype for ‘do_syscall’ [-Wmissing-prototypes] 40 | void noinstr do_syscall(struct pt_regs *regs) | ^~~~~~~~~~ arch/loongarch/kernel/smp.c:502:17: warning: no previous prototype for ‘start_secondary’ [-Wmissing-prototypes] 502 | asmlinkage void start_secondary(void) | ^~~~~~~~~~~~~~~ arch/loongarch/kernel/process.c:309:15: warning: no previous prototype for ‘arch_align_stack’ [-Wmissing-prototypes] 309 | unsigned long arch_align_stack(unsigned long sp) | ^~~~~~~~~~~~~~~~ arch/loongarch/kernel/topology.c:13:5: warning: no previous prototype for ‘arch_register_cpu’ [-Wmissing-prototypes] 13 | int arch_register_cpu(int cpu) | ^~~~~~~~~~~~~~~~~ arch/loongarch/kernel/topology.c:27:6: warning: no previous prototype for ‘arch_unregister_cpu’ [-Wmissing-prototypes] 27 | void arch_unregister_cpu(int cpu) | ^~~~~~~~~~~~~~~~~~~ arch/loongarch/kernel/module-sections.c:103:5: warning: no previous prototype for ‘module_frob_arch_sections’ [-Wmissing-prototypes] 103 | int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/loongarch/mm/hugetlbpage.c:56:5: warning: no previous prototype for ‘is_aligned_hugepage_range’ [-Wmissing-prototypes] 56 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len) | ^~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-20LoongArch: Fix lockdep static memory detectionHelge Deller
Since commit 0a6b58c5cd0d ("lockdep: fix static memory detection even more") the lockdep code uses is_kernel_core_data(), is_kernel_rodata() and init_section_contains() to verify if a lock is located inside a kernel static data section. This change triggers a failure on LoongArch, for which the vmlinux.lds.S script misses to put the locks (as part of in the .data.rel symbols) into the Linux data section. This patch fixes the lockdep problem by moving *(.data.rel*) symbols into the kernel data section (from _sdata to _edata). Additionally, move other wrongly assigned symbols too: - altinstructions into the _initdata section, - PLT symbols behind the read-only section, and - *(.la_abs) into the data section. Cc: stable <stable@kernel.org> # v6.4+ Fixes: 0a6b58c5cd0d ("lockdep: fix static memory detection even more") Reported-by: Guenter Roeck <linux@roeck-us.net> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-08Merge tag 'loongarch-6.6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson Pull LoongArch updates from Huacai Chen: - Allow usage of LSX/LASX in the kernel, and use them for SIMD-optimized RAID5/RAID6 routines - Add Loongson Binary Translation (LBT) extension support - Add basic KGDB & KDB support - Add building with kcov coverage - Add KFENCE (Kernel Electric-Fence) support - Add KASAN (Kernel Address Sanitizer) support - Some bug fixes and other small changes - Update the default config file * tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (25 commits) LoongArch: Update Loongson-3 default config file LoongArch: Add KASAN (Kernel Address Sanitizer) support LoongArch: Simplify the processing of jumping new kernel for KASLR kasan: Add (pmd|pud)_init for LoongArch zero_(pud|p4d)_populate process kasan: Add __HAVE_ARCH_SHADOW_MAP to support arch specific mapping LoongArch: Add KFENCE (Kernel Electric-Fence) support LoongArch: Get partial stack information when providing regs parameter LoongArch: mm: Add page table mapped mode support for virt_to_page() kfence: Defer the assignment of the local variable addr LoongArch: Allow building with kcov coverage LoongArch: Provide kaslr_offset() to get kernel offset LoongArch: Add basic KGDB & KDB support LoongArch: Add Loongson Binary Translation (LBT) extension support raid6: Add LoongArch SIMD recovery implementation raid6: Add LoongArch SIMD syndrome calculation LoongArch: Add SIMD-optimized XOR routines LoongArch: Allow usage of LSX/LASX in the kernel LoongArch: Define symbol 'fault' as a local label in fpu.S LoongArch: Adjust {copy, clear}_user exception handler behavior LoongArch: Use static defined zero page rather than allocated ...
2023-09-06LoongArch: Add KASAN (Kernel Address Sanitizer) supportQing Zhang
1/8 of kernel addresses reserved for shadow memory. But for LoongArch, There are a lot of holes between different segments and valid address space (256T available) is insufficient to map all these segments to kasan shadow memory with the common formula provided by kasan core, saying (addr >> KASAN_SHADOW_SCALE_SHIFT) + KASAN_SHADOW_OFFSET So LoongArch has a arch-specific mapping formula, different segments are mapped individually, and only limited space lengths of these specific segments are mapped to shadow. At early boot stage the whole shadow region populated with just one physical page (kasan_early_shadow_page). Later, this page is reused as readonly zero shadow for some memory that kasan currently don't track. After mapping the physical memory, pages for shadow memory are allocated and mapped. Functions like memset()/memcpy()/memmove() do a lot of memory accesses. If bad pointer passed to one of these function it is important to be caught. Compiler's instrumentation cannot do this since these functions are written in assembly. KASan replaces memory functions with manually instrumented variants. Original functions declared as weak symbols so strong definitions in mm/kasan/kasan.c could replace them. Original functions have aliases with '__' prefix in names, so we could call non-instrumented variant if needed. Signed-off-by: Qing Zhang <zhangqing@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Simplify the processing of jumping new kernel for KASLRQing Zhang
Modified relocate_kernel() doesn't return new kernel's entry point but the random_offset. In this way we share the start_kernel() processing with the normal kernel, which avoids calling 'jr a0' directly and allows some other operations (e.g, kasan_early_init) before start_kernel() when KASLR (CONFIG_RANDOMIZE_BASE) is turned on. Signed-off-by: Qing Zhang <zhangqing@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Get partial stack information when providing regs parameterEnze Li
Currently, arch_stack_walk() can only get the full stack information including NMI. This is because the implementation of arch_stack_walk() is forced to ignore the information passed by the regs parameter and use the current stack information instead. For some detection systems like KFENCE, only partial stack information is needed. In particular, the stack frame where the interrupt occurred. To support KFENCE, this patch modifies the implementation of the arch_stack_walk() function so that if this function is called with the regs argument passed, it retains all the stack information in regs and uses it to provide accurate information. Before this patch: [ 1.531195 ] ================================================================== [ 1.531442 ] BUG: KFENCE: out-of-bounds read in stack_trace_save_regs+0x48/0x6c [ 1.531442 ] [ 1.531900 ] Out-of-bounds read at 0xffff800012267fff (1B left of kfence-#12): [ 1.532046 ] stack_trace_save_regs+0x48/0x6c [ 1.532169 ] kfence_report_error+0xa4/0x528 [ 1.532276 ] kfence_handle_page_fault+0x124/0x270 [ 1.532388 ] no_context+0x50/0x94 [ 1.532453 ] do_page_fault+0x1a8/0x36c [ 1.532524 ] tlb_do_page_fault_0+0x118/0x1b4 [ 1.532623 ] test_out_of_bounds_read+0xa0/0x1d8 [ 1.532745 ] kunit_generic_run_threadfn_adapter+0x1c/0x28 [ 1.532854 ] kthread+0x124/0x130 [ 1.532922 ] ret_from_kernel_thread+0xc/0xa4 <snip> After this patch: [ 1.320220 ] ================================================================== [ 1.320401 ] BUG: KFENCE: out-of-bounds read in test_out_of_bounds_read+0xa8/0x1d8 [ 1.320401 ] [ 1.320898 ] Out-of-bounds read at 0xffff800012257fff (1B left of kfence-#10): [ 1.321134 ] test_out_of_bounds_read+0xa8/0x1d8 [ 1.321264 ] kunit_generic_run_threadfn_adapter+0x1c/0x28 [ 1.321392 ] kthread+0x124/0x130 [ 1.321459 ] ret_from_kernel_thread+0xc/0xa4 <snip> Suggested-by: Jinyang He <hejinyang@loongson.cn> Signed-off-by: Enze Li <lienze@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Add basic KGDB & KDB supportQing Zhang
KGDB is intended to be used as a source level debugger for the Linux kernel. It is used along with gdb to debug a Linux kernel. GDB can be used to "break in" to the kernel to inspect memory, variables and regs similar to the way an application developer would use GDB to debug an application. KDB is a frontend of KGDB which is similar to GDB. By now, in addition to the generic KGDB features, the LoongArch KGDB implements the following features: - Hardware breakpoints/watchpoints; - Software single-step support for KDB. Signed-off-by: Qing Zhang <zhangqing@loongson.cn> # Framework & CoreFeature Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> # BreakPoint & SingleStep Signed-off-by: Hui Li <lihui@loongson.cn> # Some Minor Improvements Signed-off-by: Randy Dunlap <rdunlap@infradead.org> # Some Build Error Fixes Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Add Loongson Binary Translation (LBT) extension supportQi Hu
Loongson Binary Translation (LBT) is used to accelerate binary translation, which contains 4 scratch registers (scr0 to scr3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). This patch support kernel to save/restore these registers, handle the LBT exception and maintain sigcontext. Signed-off-by: Qi Hu <huqi@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Allow usage of LSX/LASX in the kernelHuacai Chen
Allow usage of LSX/LASX in the kernel by extending kernel_fpu_begin() and kernel_fpu_end(). Reviewed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Define symbol 'fault' as a local label in fpu.STiezhu Yang
The initial aim is to silence the following objtool warnings: arch/loongarch/kernel/fpu.o: warning: objtool: _save_fp_context() falls through to next function fault() arch/loongarch/kernel/fpu.o: warning: objtool: _restore_fp_context() falls through to next function fault() arch/loongarch/kernel/fpu.o: warning: objtool: _save_lsx_context() falls through to next function fault() arch/loongarch/kernel/fpu.o: warning: objtool: _restore_lsx_context() falls through to next function fault() arch/loongarch/kernel/fpu.o: warning: objtool: _save_lasx_context() falls through to next function fault() arch/loongarch/kernel/fpu.o: warning: objtool: _restore_lasx_context() falls through to next function fault() Currently, SYM_FUNC_START()/SYM_FUNC_END() defines the symbol 'fault' as SYM_T_FUNC which is STT_FUNC, the objtool warnings are generated through the following code: tools/objtool/include/objtool/check.h: static inline struct symbol *insn_func(struct instruction *insn) { struct symbol *sym = insn->sym; if (sym && sym->type != STT_FUNC) sym = NULL; return sym; } tools/objtool/check.c: static int validate_branch(struct objtool_file *file, struct symbol *func, struct instruction *insn, struct insn_state state) { ... if (func && insn_func(insn) && func != insn_func(insn)->pfunc) { ... WARN("%s() falls through to next function %s()", func->name, insn_func(insn)->name); return 1; } ... } We can see that the fixup can be a local label in the following code: arch/loongarch/include/asm/asm-extable.h: .pushsection __ex_table, "a"; \ .balign 4; \ .long ((insn) - .); \ .long ((fixup) - .); \ .short (type); \ .short (data); \ .popsection; .macro _asm_extable, insn, fixup __ASM_EXTABLE_RAW(\insn, \fixup, EX_TYPE_FIXUP, 0) .endm Like arch/loongarch/lib/*.S, just define the symbol 'fault' as a local label in fpu.S. Before: $ readelf -s arch/loongarch/kernel/fpu.o | awk -F: /fault/'{print $2}' 000000000000053c 8 FUNC GLOBAL DEFAULT 1 fault After: $ readelf -s arch/loongarch/kernel/fpu.o | awk -F: /fault/'{print $2}' 000000000000053c 0 NOTYPE LOCAL DEFAULT 1 .L_fpu_fault Co-developed-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Use static defined zero page rather than allocatedBibo Mao
On LoongArch system, there is only one page needed for zero page (no cache synonyms), and there is no COLOR_ZERO_PAGE, so zero_page_mask is useless and the macro __HAVE_COLOR_ZERO_PAGE is not necessary. Like other popular architectures, It is simpler to define the zero page in kernel BSS code segment rather than dynamically allocate. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: mm: Introduce unified function populate_kernel_pte()Bibo Mao
Function pcpu_populate_pte() and fixmap_pte() are similar, they populate one page from kernel address space. And there is confusion between pgd and p4d in the function fixmap_pte(), such as pgd_none() always returns zero. This patch introduces a unified function populate_kernel_pte() and then replaces pcpu_populate_pte() and fixmap_pte(). Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-06LoongArch: Code improvements in function pcpu_populate_pte()Bibo Mao
Do some code improvements in function pcpu_populate_pte(): 1. Add memory allocation failure handling; 2. Replace pgd_populate() with p4d_populate(), it will be useful if there are four-level page tables. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-09-01Merge tag 'tty-6.6-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here is the big set of tty and serial driver changes for 6.6-rc1. Lots of cleanups in here this cycle, and some driver updates. Short summary is: - Jiri's continued work to make the tty code and apis be a bit more sane with regards to modern kernel coding style and types - cpm_uart driver updates - n_gsm updates and fixes - meson driver updates - sc16is7xx driver updates - 8250 driver updates for different hardware types - qcom-geni driver fixes - tegra serial driver change - stm32 driver updates - synclink_gt driver cleanups - tty structure size reduction All of these have been in linux-next this week with no reported issues. The last bit of cleanups from Jiri and the tty structure size reduction came in last week, a bit late but as they were just style changes and size reductions, I figured they should get into this merge cycle so that others can work on top of them with no merge conflicts" * tag 'tty-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (199 commits) tty: shrink the size of struct tty_struct by 40 bytes tty: n_tty: deduplicate copy code in n_tty_receive_buf_real_raw() tty: n_tty: extract ECHO_OP processing to a separate function tty: n_tty: unify counts to size_t tty: n_tty: use u8 for chars and flags tty: n_tty: simplify chars_in_buffer() tty: n_tty: remove unsigned char casts from character constants tty: n_tty: move newline handling to a separate function tty: n_tty: move canon handling to a separate function tty: n_tty: use MASK() for masking out size bits tty: n_tty: make n_tty_data::num_overrun unsigned tty: n_tty: use time_is_before_jiffies() in n_tty_receive_overrun() tty: n_tty: use 'num' for writes' counts tty: n_tty: use output character directly tty: n_tty: make flow of n_tty_receive_buf_common() a bool Revert "tty: serial: meson: Add a earlycon for the T7 SoC" Documentation: devices.txt: Fix minors for ttyCPM* Documentation: devices.txt: Remove ttySIOC* Documentation: devices.txt: Remove ttyIOC* serial: 8250_bcm7271: improve bcm7271 8250 port ...
2023-08-30Merge tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drmLinus Torvalds
Pull drm updates from Dave Airlie: "The drm core grew a new generic gpu virtual address manager, and new execution locking helpers. These are used by nouveau now to provide uAPI support for the userspace Vulkan driver. AMD had a bunch of new IP core support, loads of refactoring around fbdev, but mostly just the usual amount of stuff across the board. core: - fix gfp flags in drmm_kmalloc gpuva: - add new generic GPU VA manager (for nouveau initially) syncobj: - add new DRM_IOCTL_SYNCOBJ_EVENTFD ioctl dma-buf: - acquire resv lock for mmap() in exporters - support dma-buf self import automatically - docs fixes backlight: - fix fbdev interactions atomic: - improve logging prime: - remove struct gem_prim_mmap plus driver updates gem: - drm_exec: add locking over multiple GEM objects - fix lockdep checking fbdev: - make fbdev userspace interfaces optional - use linux device instead of fbdev device - use deferred i/o helper macros in various drivers - Make FB core selectable without drivers - Remove obsolete flags FBINFO_DEFAULT and FBINFO_FLAG_DEFAULT - Add helper macros and Kconfig tokens for DMA-allocated framebuffer ttm: - support init_on_free - swapout fixes panel: - panel-edp: Support AUO B116XAB01.4 - Support Visionox R66451 plus DT bindings - ld9040: - Backlight support - magic improved - Kconfig fix - Convert to of_device_get_match_data() - Fix Kconfig dependencies - simple: - Set bpc value to fix warning - Set connector type for AUO T215HVN01 - Support Innolux G156HCE-L01 plus DT bindings - ili9881: Support TDO TL050HDV35 LCD panel plus DT bindings - startek: Support KD070FHFID015 MIPI-DSI panel plus DT bindings - sitronix-st7789v: - Support Inanbo T28CP45TN89 plus DT bindings - Support EDT ET028013DMA plus DT bindings - Various cleanups - edp: Add timings for N140HCA-EAC - Allow panels and touchscreens to power sequence together - Fix Innolux G156HCE-L01 LVDS clock bridge: - debugfs for chains support - dw-hdmi: - Improve support for YUV420 bus format - CEC suspend/resume - update EDID on HDMI detect - dw-mipi-dsi: Fix enable/disable of DSI controller - lt9611uxc: Use MODULE_FIRMWARE() - ps8640: Remove broken EDID code - samsung-dsim: Fix command transfer - tc358764: - Handle HS/VS polarity - Use BIT() macro - Various cleanups - adv7511: Fix low refresh rate - anx7625: - Switch to macros instead of hardcoded values - locking fixes - tc358767: fix hardware delays - sitronix-st7789v: - Support panel orientation - Support rotation property - Add support for Jasonic JT240MHQS-HWT-EK-E3 plus DT bindings amdgpu: - SDMA 6.1.0 support - HDP 6.1 support - SMUIO 14.0 support - PSP 14.0 support - IH 6.1 support - Lots of checkpatch cleanups - GFX 9.4.3 updates - Add USB PD and IFWI flashing documentation - GPUVM updates - RAS fixes - DRR fixes - FAMS fixes - Virtual display fixes - Soft IH fixes - SMU13 fixes - Rework PSP firmware loading for other IPs - Kernel doc fixes - DCN 3.0.1 fixes - LTTPR fixes - DP MST fixes - DCN 3.1.6 fixes - SMU 13.x fixes - PSP 13.x fixes - SubVP fixes - GC 9.4.3 fixes - Display bandwidth calculation fixes - VCN4 secure submission fixes - Allow building DC on RISC-V - Add visible FB info to bo_print_info - HBR3 fixes - GFX9 MCBP fix - GMC10 vmhub index fix - GMC11 vmhub index fix - Create a new doorbell manager - SR-IOV fixes - initial freesync panel replay support - revert zpos properly until igt regression is fixeed - use TTM to manage doorbell BAR - Expose both current and average power via hwmon if supported amdkfd: - Cleanup CRIU dma-buf handling - Use KIQ to unmap HIQ - GFX 9.4.3 debugger updates - GFX 9.4.2 debugger fixes - Enable cooperative groups fof gfx11 - SVM fixes - Convert older APUs to use dGPU path like newer APUs - Drop IOMMUv2 path as it is no longer used - TBA fix for aldebaran i915: - ICL+ DSI modeset sequence - HDCP improvements - MTL display fixes and cleanups - HSW/BDW PSR1 restored - Init DDI ports in VBT order - General display refactors - Start using plane scale factor for relative data rate - Use shmem for dpt objects - Expose RPS thresholds in sysfs - Apply GuC SLPC min frequency softlimit correctly - Extend Wa_14015795083 to TGL, RKL, DG1 and ADL - Fix a VMA UAF for multi-gt platform - Do not use stolen on MTL due to HW bug - Check HuC and GuC version compatibility on MTL - avoid infinite GPU waits due to premature release of request memory - Fixes and updates for GSC memory allocation - Display SDVO fixes - Take stolen handling out of FBC code - Make i915_coherent_map_type GT-centric - Simplify shmem_create_from_object map_type msm: - SM6125 MDSS support - DPU: SM6125 DPU support - DSI: runtime PM support, burst mode support - DSI PHY: SM6125 support in 14nm DSI PHY driver - GPU: prepare for a7xx - fix a690 firmware - disable relocs on a6xx and newer radeon: - Lots of checkpatch cleanups ast: - improve device-model detection - Represent BMV as virtual connector - Report DP connection status nouveau: - add new exec/bind interface to support Vulkan - document some getparam ioctls - improve VRAM detection - various fixes/cleanups - workraound DPCD issues ivpu: - MMU updates - debugfs support - Support vpu4 virtio: - add sync object support atmel-hlcdc: - Support inverted pixclock polarity etnaviv: - runtime PM cleanups - hang handling fixes exynos: - use fbdev DMA helpers - fix possible NULL ptr dereference komeda: - always attach encoder omapdrm: - use fbdev DMA helpers ingenic: - kconfig regmap fixes loongson: - support display controller mediatek: - Small mtk-dpi cleanups - DisplayPort: support eDP and aux-bus - Fix coverity issues - Fix potential memory leak if vmap() fail mgag200: - minor fixes mxsfb: - support disabling overlay planes panfrost: - fix sync in IRQ handling ssd130x: - Support per-controller default resolution plus DT bindings - Reduce memory-allocation overhead - Improve intermediate buffer size computation - Fix allocation of temporary buffers - Fix pitch computation - Fix shadow plane allocation tegra: - use fbdev DMA helpers - Convert to devm_platform_ioremap_resource() - support bridge/connector - enable PM tidss: - Support TI AM625 plus DT bindings - Implement new connector model plus driver updates vkms: - improve write back support - docs fixes - support gamma LUT zynqmp-dpsub: - misc fixes" * tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm: (1327 commits) drm/gpuva_mgr: remove unused prev pointer in __drm_gpuva_sm_map() drm/tests/drm_kunit_helpers: Place correct function name in the comment header drm/nouveau: uapi: don't pass NO_PREFETCH flag implicitly drm/nouveau: uvmm: fix unset region pointer on remap drm/nouveau: sched: avoid job races between entities drm/i915: Fix HPD polling, reenabling the output poll work as needed drm: Add an HPD poll helper to reschedule the poll work drm/i915: Fix TLB-Invalidation seqno store drm/ttm/tests: Fix type conversion in ttm_pool_test drm/msm/a6xx: Bail out early if setting GPU OOB fails drm/msm/a6xx: Move LLC accessors to the common header drm/msm/a6xx: Introduce a6xx_llc_read drm/ttm/tests: Require MMU when testing drm/panel: simple: Fix Innolux G156HCE-L01 LVDS clock Revert "Revert "drm/amdgpu/display: change pipe policy for DCN 2.0"" drm/amdgpu: Add memory vendor information drm/amd: flush any delayed gfxoff on suspend entry drm/amdgpu: skip fence GFX interrupts disable/enable for S0ix drm/amdgpu: Remove gfxoff check in GFX v9.4.3 drm/amd/pm: Update pci link speed for smu v13.0.6 ...
2023-08-29Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - An extensive rework of kexec and crash Kconfig from Eric DeVolder ("refactor Kconfig to consolidate KEXEC and CRASH options") - kernel.h slimming work from Andy Shevchenko ("kernel.h: Split out a couple of macros to args.h") - gdb feature work from Kuan-Ying Lee ("Add GDB memory helper commands") - vsprintf inclusion rationalization from Andy Shevchenko ("lib/vsprintf: Rework header inclusions") - Switch the handling of kdump from a udev scheme to in-kernel handling, by Eric DeVolder ("crash: Kernel handling of CPU and memory hot un/plug") - Many singleton patches to various parts of the tree * tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (81 commits) document while_each_thread(), change first_tid() to use for_each_thread() drivers/char/mem.c: shrink character device's devlist[] array x86/crash: optimize CPU changes crash: change crash_prepare_elf64_headers() to for_each_possible_cpu() crash: hotplug support for kexec_load() x86/crash: add x86 crash hotplug support crash: memory and CPU hotplug sysfs attributes kexec: exclude elfcorehdr from the segment digest crash: add generic infrastructure for crash hotplug support crash: move a few code bits to setup support of crash hotplug kstrtox: consistently use _tolower() kill do_each_thread() nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse scripts/bloat-o-meter: count weak symbol sizes treewide: drop CONFIG_EMBEDDED lockdep: fix static memory detection even more lib/vsprintf: declare no_hash_pointers in sprintf.h lib/vsprintf: split out sprintf() and friends kernel/fork: stop playing lockless games for exe_file replacement adfs: delete unused "union adfs_dirtail" definition ...
2023-08-26LoongArch: Fix hw_breakpoint_control() for watchpointsHuacai Chen
In hw_breakpoint_control(), encode_ctrl_reg() has already encoded the MWPnCFG3_LoadEn/MWPnCFG3_StoreEn bits in info->ctrl. We don't need to add (1 << MWPnCFG3_LoadEn | 1 << MWPnCFG3_StoreEn) unconditionally. Otherwise we can't set read watchpoint and write watchpoint separately. Cc: stable@vger.kernel.org Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-26LoongArch: Ensure FP/SIMD registers in the core dump file is up to dateHuacai Chen
This is a port of commit 379eb01c21795edb4c ("riscv: Ensure the value of FP registers in the core dump file is up to date"). The values of FP/SIMD registers in the core dump file come from the thread.fpu. However, kernel saves the FP/SIMD registers only before scheduling out the process. If no process switch happens during the exception handling, kernel will not have a chance to save the latest values of FP/SIMD registers. So it may cause their values in the core dump file incorrect. To solve this problem, force fpr_get()/simd_get() to save the FP/SIMD registers into the thread.fpu if the target task equals the current task. Cc: stable@vger.kernel.org Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-25LoongArch: Put the body of play_dead() into arch_cpu_idle_dead()Tiezhu Yang
The initial aim is to silence the following objtool warning: arch/loongarch/kernel/process.o: warning: objtool: arch_cpu_idle_dead() falls through to next function start_thread() According to tools/objtool/Documentation/objtool.txt, this is because the last instruction of arch_cpu_idle_dead() is a call to a noreturn function play_dead(). In order to silence the warning, one simple way is to add the noreturn function play_dead() to objtool's hard-coded global_noreturns array, that is to say, just put "NORETURN(play_dead)" into tools/objtool/noreturns.h, it works well. But I noticed that play_dead() is only defined once and only called by arch_cpu_idle_dead(), so put the body of play_dead() into the caller arch_cpu_idle_dead(), then remove the noreturn function play_dead() is an alternative way which can reduce the overhead of the function call at the same time. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-25LoongArch: Return earlier in die() if notify_die() returns NOTIFY_STOPTiezhu Yang
After the call to oops_exit(), it should not panic or execute the crash kernel if the oops is to be suppressed. Suggested-by: Maciej W. Rozycki <macro@orcam.me.uk> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-25LoongArch: Do not kill the task in die() if notify_die() returns NOTIFY_STOPTiezhu Yang
If notify_die() returns NOTIFY_STOP, honor the return value from the handler chain invocation in die() and return without killing the task as, through a debugger, the fault may have been fixed. It makes sense even if ignoring the event will make the system unstable: by allowing access through a debugger it has been compromised already anyway. It makes our port consistent with x86, arm64, riscv and csky. Commit 20c0d2d44029 ("[PATCH] i386: pass proper trap numbers to die chain handlers") may be the earliest of similar changes. Link: https://lore.kernel.org/r/43DDF02E.76F0.0078.0@novell.com/ Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-25LoongArch: Replace #include <asm/export.h> with #include <linux/export.h>Masahiro Yamada
Commit ddb5cdbafaaad ("kbuild: generate KSYMTAB entries by modpost") deprecated <asm/export.h>, which is now a wrapper of <linux/export.h>. Replace #include <asm/export.h> with #include <linux/export.h>. After all the <asm/export.h> lines are converted, <asm/export.h> and <asm-generic/export.h> will be removed. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-25LoongArch: Remove unneeded #include <asm/export.h>Masahiro Yamada
There is no EXPORT_SYMBOL() line there, hence #include <asm/export.h> is unneeded. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-08-24BackMerge tag 'v6.5-rc7' into drm-nextDave Airlie
Linux 6.5-rc7 This is needed for the CI stuff and the msm pull has fixes in it. Signed-off-by: Dave Airlie <airlied@redhat.com>
2023-08-18nmi_backtrace: allow excluding an arbitrary CPUDouglas Anderson
The APIs that allow backtracing across CPUs have always had a way to exclude the current CPU. This convenience means callers didn't need to find a place to allocate a CPU mask just to handle the common case. Let's extend the API to take a CPU ID to exclude instead of just a boolean. This isn't any more complex for the API to handle and allows the hardlockup detector to exclude a different CPU (the one it already did a trace for) without needing to find space for a CPU mask. Arguably, this new API also encourages safer behavior. Specifically if the caller wants to avoid tracing the current CPU (maybe because they already traced the current CPU) this makes it more obvious to the caller that they need to make sure that the current CPU ID can't change. [akpm@linux-foundation.org: fix trigger_allbutcpu_cpu_backtrace() stub] Link: https://lkml.kernel.org/r/20230804065935.v4.1.Ia35521b91fc781368945161d7b28538f9996c182@changeid Signed-off-by: Douglas Anderson <dianders@chromium.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: kernel test robot <lkp@intel.com> Cc: Lecopzer Chen <lecopzer.chen@mediatek.com> Cc: Petr Mladek <pmladek@suse.com> Cc: Pingfan Liu <kernelfans@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-07-31Merge 6.5-rc4 into tty-nextGreg Kroah-Hartman
We need the serial/tty fixes in here as well for testing and future development. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-07-28LoongArch: Fix CMDLINE_EXTEND and CMDLINE_BOOTLOADER handlingZhihong Dong
On FDT systems these command line processing are already taken care of by early_init_dt_scan_chosen(). Add similar handling to the ACPI (non- FDT) code path to allow these config options to work for ACPI (non-FDT) systems too. Signed-off-by: Zhihong Dong <donmor3000@hotmail.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-07-25tty: sysrq: switch sysrq handlers from int to u8Jiri Slaby
The passed parameter to sysrq handlers is a key (a character). So change the type from 'int' to 'u8'. Let it specifically be 'u8' for two reasons: * unsigned: unsigned values come from the upper layers (devices) and the tty layer assumes unsigned on most places, and * 8-bit: as that what's supposed to be one day in all the layers built on the top of tty. (Currently, we use mostly 'unsigned char' and somewhere still only 'char'. (But that also translates to the former thanks to -funsigned-char.)) Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org> Cc: Richard Henderson <richard.henderson@linaro.org> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: David Airlie <airlied@gmail.com> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Daniel Thompson <daniel.thompson@linaro.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Frederic Weisbecker <frederic@kernel.org> Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Zqiang <qiang.zhang1211@gmail.com> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> # DRM Acked-by: WANG Xuerui <git@xen0n.name> # loongarch Acked-by: Paul E. McKenney <paulmck@kernel.org> Acked-by: Daniel Thompson <daniel.thompson@linaro.org> Link: https://lore.kernel.org/r/20230712081811.29004-3-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-07-17Merge tag 'drm-misc-next-2023-07-13' of ↵Daniel Vetter
git://anongit.freedesktop.org/drm/drm-misc into drm-next drm-misc-next for v6.6: UAPI Changes: * fbdev: * Make fbdev userspace interfaces optional; only leaves the framebuffer console active * prime: * Support dma-buf self-import for all drivers automatically: improves support for many userspace compositors Cross-subsystem Changes: * backlight: * Fix interaction with fbdev in several drivers * base: Convert struct platform.remove to return void; part of a larger, tree-wide effort * dma-buf: Acquire reservation lock for mmap() in exporters; part of an on-going effort to simplify locking around dma-bufs * fbdev: * Use Linux device instead of fbdev device in many places * Use deferred-I/O helper macros in various drivers * i2c: Convert struct i2c from .probe_new to .probe; part of a larger, tree-wide effort * video: * Avoid including <linux/screen_info.h> Core Changes: * atomic: * Improve logging * prime: * Remove struct drm_driver.gem_prime_mmap plus driver updates: all drivers now implement this callback with drm_gem_prime_mmap() * gem: * Support execution contexts: provides locking over multiple GEM objects * ttm: * Support init_on_free * Swapout fixes Driver Changes: * accel: * ivpu: MMU updates; Support debugfs * ast: * Improve device-model detection * Cleanups * bridge: * dw-hdmi: Improve support for YUV420 bus format * dw-mipi-dsi: Fix enable/disable of DSI controller * lt9611uxc: Use MODULE_FIRMWARE() * ps8640: Remove broken EDID code * samsung-dsim: Fix command transfer * tc358764: Handle HS/VS polarity; Use BIT() macro; Various cleanups * Cleanups * ingenic: * Kconfig REGMAP fixes * loongson: * Support display controller * mgag200: * Minor fixes * mxsfb: * Support disabling overlay planes * nouveau: * Improve VRAM detection * Various fixes and cleanups * panel: * panel-edp: Support AUO B116XAB01.4 * Support Visionox R66451 plus DT bindings * Cleanups * ssd130x: * Support per-controller default resolution plus DT bindings * Reduce memory-allocation overhead * Cleanups * tidss: * Support TI AM625 plus DT bindings * Implement new connector model plus driver updates * vkms * Improve write-back support * Documentation fixes Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> From: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230713090830.GA23281@linux-uq9g
2023-07-08efi: Do not include <linux/screen_info.h> from EFI headerThomas Zimmermann
The header file <linux/efi.h> does not need anything from <linux/screen_info.h>. Declare struct screen_info and remove the include statements. Update a number of source files that require struct screen_info's definition. v2: * update loongarch (Jingfeng) Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://patchwork.freedesktop.org/patch/msgid/20230706104852.27451-2-tzimmermann@suse.de
2023-06-30Merge tag 'trace-v6.5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing updates from Steven Rostedt: - Add new feature to have function graph tracer record the return value. Adds a new option: funcgraph-retval ; when set, will show the return value of a function in the function graph tracer. - Also add the option: funcgraph-retval-hex where if it is not set, and the return value is an error code, then it will return the decimal of the error code, otherwise it still reports the hex value. - Add the file /sys/kernel/tracing/osnoise/per_cpu/cpu<cpu>/timerlat_fd That when a application opens it, it becomes the task that the timer lat tracer traces. The application can also read this file to find out how it's being interrupted. - Add the file /sys/kernel/tracing/available_filter_functions_addrs that works just the same as available_filter_functions but also shows the addresses of the functions like kallsyms, except that it gives the address of where the fentry/mcount jump/nop is. This is used by BPF to make it easier to attach BPF programs to ftrace hooks. - Replace strlcpy with strscpy in the tracing boot code. * tag 'trace-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing: Fix warnings when building htmldocs for function graph retval riscv: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL tracing/boot: Replace strlcpy with strscpy tracing/timerlat: Add user-space interface tracing/osnoise: Skip running osnoise if all instances are off tracing/osnoise: Switch from PF_NO_SETAFFINITY to migrate_disable ftrace: Show all functions with addresses in available_filter_functions_addrs selftests/ftrace: Add funcgraph-retval test case LoongArch: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL x86/ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL arm64: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL tracing: Add documentation for funcgraph-retval and funcgraph-retval-hex function_graph: Support recording and printing the return value of function fgraph: Add declaration of "struct fgraph_ret_regs"
2023-06-30Merge tag 'loongarch-6.5' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson Pull LoongArch updates from Huacai Chen: - preliminary ClangBuiltLinux enablement - add support to clone a time namespace - add vector extensions support - add SMT (Simultaneous Multi-Threading) support - support dbar with different hints - introduce hardware page table walker - add jump-label implementation - add rethook and uprobes support - some bug fixes and other small changes * tag 'loongarch-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (28 commits) LoongArch: Remove five DIE_* definitions in kdebug.h LoongArch: Add uprobes support LoongArch: Use larch_insn_gen_break() for kprobes LoongArch: Add larch_insn_gen_break() to generate break insns LoongArch: Check for AMO instructions in insns_not_supported() LoongArch: Move three functions from kprobes.c to inst.c LoongArch: Replace kretprobe with rethook LoongArch: Add jump-label implementation LoongArch: Select HAVE_DEBUG_KMEMLEAK to support kmemleak LoongArch: Export some arch-specific pm interfaces LoongArch: Introduce hardware page table walker LoongArch: Support dbar with different hints LoongArch: Add SMT (Simultaneous Multi-Threading) support LoongArch: Add vector extensions support LoongArch: Add support to clone a time namespace Makefile: Add loongarch target flag for Clang compilation LoongArch: Mark Clang LTO as working LoongArch: Include KBUILD_CPPFLAGS in CHECKFLAGS invocation LoongArch: vDSO: Use CLANG_FLAGS instead of filtering out '--target=' LoongArch: Tweak CFLAGS for Clang compatibility ...
2023-06-29LoongArch: Add uprobes supportTiezhu Yang
Uprobes is the user-space counterpart to kprobes, this patch adds uprobes support for LoongArch. Here is a simple example with CONFIG_UPROBE_EVENTS=y: # cat test.c #include <stdio.h> int add(int a, int b) { return a + b; } int main() { return add(2, 7); } # gcc test.c -o /tmp/test # nm /tmp/test | grep add 0000000120004194 T add # cd /sys/kernel/debug/tracing # echo > uprobe_events # echo "p:myuprobe /tmp/test:0x4194 %r4 %r5" > uprobe_events # echo "r:myuretprobe /tmp/test:0x4194 %r4" >> uprobe_events # echo 1 > events/uprobes/enable # echo 1 > tracing_on # /tmp/test # cat trace ... # TASK-PID CPU# ||||| TIMESTAMP FUNCTION # | | | ||||| | | test-1060 [001] DNZff 1015.770620: myuprobe: (0x120004194) arg1=0x2 arg2=0x7 test-1060 [001] DNZff 1015.770930: myuretprobe: (0x1200041f0 <- 0x120004194) arg1=0x9 Tested-by: Jeff Xie <xiehuan09@gmail.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Use larch_insn_gen_break() for kprobesTiezhu Yang
For now, we can use larch_insn_gen_break() to define KPROBE_BP_INSN and KPROBE_SSTEPBP_INSN. Because larch_insn_gen_break() returns instruction word, define kprobe_opcode_t as u32, then do some small changes related with type conversion, no functional change intended. Tested-by: Jeff Xie <xiehuan09@gmail.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Add larch_insn_gen_break() to generate break insnsTiezhu Yang
There exist various break insns such as BRK_KPROBE_BP, BRK_KPROBE_SSTEPBP, BRK_UPROBE_BP and BRK_UPROBE_XOLBP, add larch_insn_gen_break() to generate break insns simpler, this is preparation for later patch. Tested-by: Jeff Xie <xiehuan09@gmail.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Check for AMO instructions in insns_not_supported()Tiezhu Yang
Like llsc instructions, the atomic memory access instructions shouldn't be supported for probing, so check for them in insns_not_supported(). Closes: https://lore.kernel.org/all/SY4P282MB351877A70A0333C790FE85A5C09C9@SY4P282MB3518.AUSP282.PROD.OUTLOOK.COM/ Tested-by: Jeff Xie <xiehuan09@gmail.com> Reported-by: Hengqi Chen <hengqi.chen@gmail.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Move three functions from kprobes.c to inst.cTiezhu Yang
The three functions insns_not_supported(), insns_need_simulation() and arch_simulate_insn() will be used for uprobes, move them from kprobes.c to inst.c, this is preparation for later patch, no functionality change. Tested-by: Jeff Xie <xiehuan09@gmail.com> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Replace kretprobe with rethookHaoran Jiang
This is an adaptation of commit f3a112c0c40d ("x86,rethook,kprobes: Replace kretprobe with rethook on x86") and commit b57c2f124098 ("riscv: add riscv rethook implementation") to LoongArch. Mainly refer to commit b57c2f124098 ("riscv: add riscv rethook implementation"). Replaces the kretprobe code with rethook on LoongArch. With this patch, kretprobe on LoongArch uses the rethook instead of kretprobe specific trampoline code. Signed-off-by: Haoran Jiang <jianghaoran@kylinos.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Add jump-label implementationYouling Tang
Add support for jump labels based on the ARM64 version. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Introduce hardware page table walkerHuacai Chen
Loongson-3A6000 and newer processors have hardware page table walker (PTW) support. PTW can handle all fastpaths of TLBI/TLBL/TLBS/TLBM exceptions by hardware, software only need to handle slowpaths (page faults). BTW, PTW doesn't append _PAGE_MODIFIED for page table entries, so we change pmd_dirty() and pte_dirty() to also check _PAGE_DIRTY for the "dirty" attribute. Signed-off-by: Liang Gao <gaoliang@loongson.cn> Signed-off-by: Jun Yi <yijun@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Support dbar with different hintsHuacai Chen
Traditionally, LoongArch uses "dbar 0" (full completion barrier) for everything. But the full completion barrier is a performance killer, so Loongson-3A6000 and newer processors have made finer granularity hints available: Bit4: ordering or completion (0: completion, 1: ordering) Bit3: barrier for previous read (0: true, 1: false) Bit2: barrier for previous write (0: true, 1: false) Bit1: barrier for succeeding read (0: true, 1: false) Bit0: barrier for succeeding write (0: true, 1: false) Hint 0x700: barrier for "read after read" from the same address, which is needed by LL-SC loops on old models (dbar 0x700 behaves the same as nop if such reordering is disabled on new models). This patch makes use of the various new hints for different kinds of memory barriers. It brings performance improvements on Loongson-3A6000 series, while not affecting the existing models because all variants are treated as 'dbar 0' there. Why override queued_spin_unlock()? After commit 01e3b958efe85a26d9b ("drivers: Remove explicit invocations of mmiowb()") we need a completion barrier in queued_spin_unlock(), but the generic implementation use smp_store_release() which only provide an ordering barrier. Signed-off-by: Jun Yi <yijun@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Add SMT (Simultaneous Multi-Threading) supportHuacai Chen
Loongson-3A6000 has SMT (Simultaneous Multi-Threading) support, each physical core has two logical cores (threads). This patch add SMT probe and scheduler support via ACPI PPTT. If SCHED_SMT enabled, Loongson-3A6000 is treated as 4 cores, 8 threads; If SCHED_SMT disabled, Loongson-3A6000 is treated as 8 cores, 8 threads. Remove smp_num_siblings to support HMP (Heterogeneous Multi-Processing). Signed-off-by: Liupu Wang <wangliupu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Add vector extensions supportHuacai Chen
Add LoongArch's vector extensions support, which including 128bit LSX (i.e., Loongson SIMD eXtension) and 256bit LASX (i.e., Loongson Advanced SIMD eXtension). Linux kernel doesn't use vector itself, it only handle exceptions and context save/restore. So it only needs a subset of these instructions: * Vector load/store: vld vst vldx vstx xvld xvst xvldx xvstx * 8bit-elements move: vpickve2gr.b xvpickve2gr.b vinsgr2vr.b xvinsgr2vr.b * 16bit-elements move: vpickve2gr.h xvpickve2gr.h vinsgr2vr.h xvinsgr2vr.h * 32bit-elements move: vpickve2gr.w xvpickve2gr.w vinsgr2vr.w xvinsgr2vr.w * 64bit-elements move: vpickve2gr.d xvpickve2gr.d vinsgr2vr.d xvinsgr2vr.d * Elements permute: vpermi.w vpermi.d xvpermi.w xvpermi.d xvpermi.q Introduce AS_HAS_LSX_EXTENSION and AS_HAS_LASX_EXTENSION to avoid non- vector toolchains complains unsupported instructions. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Add support to clone a time namespaceTiezhu Yang
We can see that "Time namespaces are not supported" on LoongArch: (1) clone3 test # cd tools/testing/selftests/clone3 && make && ./clone3 ... # Time namespaces are not supported ok 18 # SKIP Skipping clone3() with CLONE_NEWTIME # Totals: pass:17 fail:0 xfail:0 xpass:0 skip:1 error:0 (2) timens test # cd tools/testing/selftests/timens && make && ./timens ... 1..0 # SKIP Time namespaces are not supported On LoongArch the current kernel does not support CONFIG_TIME_NS which depends on GENERIC_VDSO_TIME_NS, select GENERIC_VDSO_TIME_NS to enable CONFIG_TIME_NS to build kernel/time/namespace.c. Additionally, it needs to define some arch-dependent functions for the timens, such as __arch_get_timens_vdso_data(), arch_get_vdso_data() and vdso_join_timens(). At the same time, modify the layout of vvar to use one page size for generic vdso data, expand another page size for timens vdso data and assign LOONGARCH_VDSO_DATA_SIZE (maybe exceeds a page size if expand in the future) for loongarch vdso data, at last add the callback function vvar_fault() and modify stack_top(). With this patch under CONFIG_TIME_NS: (1) clone3 test # cd tools/testing/selftests/clone3 && make && ./clone3 ... ok 18 [739] Result (0) matches expectation (0) # Totals: pass:18 fail:0 xfail:0 xpass:0 skip:0 error:0 (2) timens test # cd tools/testing/selftests/timens && make && ./timens ... # Totals: pass:10 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Make the CPUCFG&CSR ops simple aliases of compiler built-insWANG Xuerui
In addition to less visual clutter, this also makes Clang happy regarding the const-ness of arguments. In the original approach, all Clang gets to see is the incoming arguments whose const-ness cannot be proven without first being inlined; so Clang errors out here while GCC is fine. While at it, tweak several printk format strings because the return type of csr_read64 becomes effectively unsigned long, instead of unsigned long long. Signed-off-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Calculate various sizes in the linker scriptWANG Rui
Taking the address delta between symbols in different sections is not supported by the LLVM IAS. Instead, do this in the linker script, so the same data can be properly referenced in assembly. Signed-off-by: WANG Rui <wangrui@loongson.cn> Signed-off-by: WANG Xuerui <git@xen0n.name> [chenhuacai: Fix build with !CONFIG_EFI_STUB] Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-06-29LoongArch: Add guard for the larch_insn_gen_xxx functionsWANG Rui
Add guard for the larch_insn_gen_xxx functions to verify whether the immediate operand is within the acceptable range. Signed-off-by: WANG Rui <wangrui@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
generated by cgit (git 2.34.1) at 2025-07-19 20:16:51 +0000