Linux kernel development work - see feature branches https://git.zx2c4.com/linux-dev/atom/arch/loongarch?h=linus%2Fmaster 2022-06-17T14:09:05Z 2022-06-17T14:09:05Z Youling Tang tangyouling@loongson.cn 2022-06-13T10:54:12Z urn:sha1:b672332ef9161f8cada005aaa9b333a19e496f07 Commit c604abc3f6e ("vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG") splits ELF_DETAILS from STABS_DEBUG, resulting in missing ELF_DETAILS information in LoongArch architecture, so add it. Fixes: c604abc3f6e ("vmlinux.lds.h: Split ELF_DETAILS from STABS_DEBUG") Signed-off-by: Youling Tang <tangyouling@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-08T03:00:40Z Jason A. Donenfeld Jason@zx2c4.com 2022-06-05T08:20:08Z urn:sha1:5c95fe8b02011c3b69173e0d86aff6d4c2798601 This comment block was taken originally from the MIPS architecture code, where indeed there are particular assumptions one can make regarding SMP and !SMP and cycle counters. On LoongArch, however, the rdtime family of functions is always available. As Xuerui wrote: The rdtime family of instructions is in fact guaranteed to be available on LoongArch; LoongArch's subsets all contain them, even the 32-bit "Primary" subset intended for university teaching -- they provide the rdtimeh.w and rdtimel.w pair of instructions that access the same 64-bit counter. So this commit simply removes the incorrect comment block. Link: https://lore.kernel.org/lkml/e78940bc-9be2-2fe7-026f-9e64a1416c9f@xen0n.name/ Fixes: b738c106f735 ("LoongArch: Add other common headers") Reviewed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-08T03:00:40Z Huacai Chen chenhuacai@loongson.cn 2022-06-05T08:20:03Z urn:sha1:0626e1c9f3e5536545431538d12c762d5abf59c8 Commit c5febea0956fd387 ("fork: Pass struct kernel_clone_args into copy_thread") change the prototype of copy_thread(), while commit 5bd2e97c868a8a44 ("fork: Generalize PF_IO_WORKER handling") change the structure of kernel_clone_args. They cause build errors, so fix it. Fixes: 5bd2e97c868a8a44 ("fork: Generalize PF_IO_WORKER handling") Fixes: c5febea0956fd387 ("fork: Pass struct kernel_clone_args into copy_thread") Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-08T03:00:40Z Huacai Chen chenhuacai@loongson.cn 2022-06-05T08:19:53Z urn:sha1:255b4658c809e194bc10236ac24a722ec14a83d6 1, We assume arch/loongarch/include/asm/smp.h be included in include/ linux/smp.h is valid and the reverse inclusion isn't. So remove the <linux/smp.h> in arch/loongarch/include/asm/smp.h. 2, arch/loongarch/include/asm/smp.h is only needed when CONFIG_SMP, and setup.c include it only because it need plat_smp_setup(). So, reorganize setup.c & smp.h, and then remove <asm/smp.h> in setup.c. 3, Fix cacheinfo.c and percpu.h build error by adding the missing header files when !CONFIG_SMP. 4, Fix acpi.c build error by adding CONFIG_SMP guards. 5, Move irq_stat definition from smp.c to irq.c and fix its declaration. 6, Select CONFIG_SMP for CONFIG_NUMA, similar as other architectures do. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:29Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:12Z urn:sha1:9e8536e261165db0795bebaaa0aa92b8ba35f3e3 Add a default config file for LoongArch-based Loongson-3 platform. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:29Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:12Z urn:sha1:d4b6f1562a3c3284adcef81d6e4f183d7d34b8a9 Add Non-Uniform Memory Access (NUMA) support for LoongArch. LoongArch has 48-bit physical address, but the HyperTransport I/O bus only support 40-bit address, so we need a custom phys_to_dma() and dma_to_phys() to extract the 4-bit node id (bit 44~47) from Loongson-3's 48-bit physical address space and embed it into 40-bit. In the 40-bit dma address, node id offset can be read from the LS7A_DMA_CFG register. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:29Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:12Z urn:sha1:46859ac8af52ae599e1b51992ddef3eb43f295fc LoongArch-based procesors have 4, 8 or 16 cores per package. This patch adds multi-processor (SMP) support for LoongArch. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:28Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:12Z urn:sha1:c6b99bed6b8f3255bd2f65a8e606352e0e638ad0 Add VDSO and VSYSCALL support (sigreturn, gettimeofday and its friends) for LoongArch. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:28Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:11Z urn:sha1:559671e04a33b183b6e65fd585ab2e2a0578208b Add some library functions for LoongArch, including: delay, memset, memcpy, memmove, copy_user, strncpy_user, strnlen_user and tlb dump functions. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn> 2022-06-03T12:09:28Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:11Z urn:sha1:7153c3cbb5b9b99755659b97861fd4fc909ed86f Add some misc common routines for LoongArch, including: asm-offsets routines, futex functions, i/o memory access functions, frame-buffer functions, procfs information display, etc. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>