Linux kernel development work - see feature branches https://git.zx2c4.com/linux-dev/atom/arch/loongarch/kernel?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 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: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:sha1:7153c3cbb5b9b99755659b97861fd4fc909ed86f 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> 2022-06-03T12:09:28Z Huacai Chen chenhuacai@loongson.cn 2022-05-31T10:04:11Z urn:sha1:fcdfe9d22bed08409968a751e93112f742208be6 Add ELF-related definition and module relocation code for basic LoongArch support. Cc: Jessica Yu <jeyu@kernel.org> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> 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:b74baf4ad05b5ebe3152592fb2fa80d51681392a Add ucontext/sigcontext definition and signal handling support for LoongArch. Cc: Eric Biederman <ebiederm@xmission.com> Cc: Al Viro <viro@zeniv.linux.org.uk> 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:be769645a2aef577f07afdcb4de8fad20b6d57c0 Add system call support and related uaccess.h for LoongArch. Q: Why keep _ARCH_WANT_SYS_CLONE definition while there is clone3: A: The latest glibc release has some basic support for clone3 but it is not complete. E.g., pthread_create() and spawni() have converted to use clone3 but fork() will still use clone. Moreover, some seccomp related applications can still not work perfectly with clone3. E.g., Chromium sandbox cannot work at all and there is no solution for it, which is more terrible than the fork() story [1]. [1] https://chromium-review.googlesource.com/c/chromium/src/+/2936184 Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>