summaryrefslogtreecommitdiff
path: root/arch/loongarch
AgeCommit message (Collapse)AuthorFilesLines
2022-07-07LoongArch: Fix section mismatch warningTiezhu Yang1-1/+0
init_numa_memory() is annotated __init and not used by any module, thus don't export it. Remove not needed EXPORT_SYMBOL for init_numa_memory() to fix the following section mismatch warning: MODPOST vmlinux.symvers WARNING: modpost: vmlinux.o(___ksymtab+init_numa_memory+0x0): Section mismatch in reference from the variable __ksymtab_init_numa_memory to the function .init.text:init_numa_memory() The symbol init_numa_memory is exported and annotated __init Fix this by removing the __init annotation of init_numa_memory or drop the export. This is build on Linux 5.19-rc4. Fixes: d4b6f1562a3c ("LoongArch: Add Non-Uniform Memory Access (NUMA) support") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-07-07LoongArch: Fix build errors for tinyconfigHuacai Chen2-0/+2
Building loongarch:tinyconfig fails with the following error. ./arch/loongarch/include/asm/page.h: In function 'pfn_valid': ./arch/loongarch/include/asm/page.h:42:32: error: 'PHYS_OFFSET' undeclared Add the missing include file and fix succeeding vdso errors. Fixes: 09cfefb7fa70 ("LoongArch: Add memory management") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-07-07LoongArch: Remove obsolete mentions of vcsrQi Hu4-14/+0
The `vcsr` only exists in the old hardware design, it isn't used in any shipped hardware from Loongson-3A5000 on. Both scalar FP and LSX/LASX instructions use the `fcsr` as their control and status registers now. For example, the RM control bit in fcsr0 is shared by FP, LSX and LASX instructions. Particularly, fcsr16 to fcsr31 are reserved for LSX/LASX now, access to these registers has no visible effect if LSX/LASX is enabled, and will cause SXD/ASXD exceptions if LSX/LASX is not enabled. So, mentions of vcsr are obsolete in the first place (it was just used for debugging), let's remove them. Reviewed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Qi Hu <huqi@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-07-07LoongArch: Drop these obsolete selects in KconfigLukas Bulwahn1-4/+0
Commit fa96b57c1490 ("LoongArch: Add build infrastructure") adds the new file arch/loongarch/Kconfig. As the work on LoongArch was probably quite some time under development, various config symbols have changed and disappeared from the time of initial writing of the Kconfig file and its inclusion in the repository. The following four commits: commit c126a53c2760 ("arch: remove GENERIC_FIND_FIRST_BIT entirely") commit 140c8180eb7c ("arch: remove HAVE_COPY_THREAD_TLS") commit aca52c398389 ("mm: remove CONFIG_HAVE_MEMBLOCK") commit 3f08a302f533 ("mm: remove CONFIG_HAVE_MEMBLOCK_NODE_MAP option") remove the mentioned config symbol, and enable the intended setup by default without configuration. Drop these obsolete selects in loongarch's Kconfig. Reviewed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-25LoongArch: Make compute_return_era() return voidTiezhu Yang2-4/+2
compute_return_era() always returns 0, make it return void, and then no need to check its return value for its callers. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-25LoongArch: Fix wrong fpu versionTiezhu Yang1-1/+1
According to the configuration information accessible by the CPUCFG instruction in LoongArch Reference Manual [1], FP_ver is stored in bit [5: 3] of CPUCFG2, the current code to get fpu version is wrong, use CPUCFG2_FPVERS to fix it. [1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html Fixes: 628c3bb40e9a ("LoongArch: Add boot and setup routines") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-25LoongArch: Fix EENTRY/MERRENTRY setting in setup_tlb_handler()Huacai Chen1-2/+3
setup_tlb_handler() is expected to set per-cpu exception handlers, but it only set the TLBRENTRY successfully because of copy & paste errors, so fix it. Reviewed-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-25LoongArch: Fix sleeping in atomic context in setup_tlb_handler()Huacai Chen1-1/+1
Since setup_tlb_handler() is executed in atomic context, we should use GFP_ATOMIC instead of GFP_KERNEL to alloc pages. Otherwise we will get a "sleeping in atomic context" error: [ 0.013118] BUG: sleeping function called from invalid context at mm/page_alloc.c:5158 [ 0.013126] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 0, name: swapper/1 [ 0.013131] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.19-rc3+ #1008 1a223086d14d07967cc427f15d52139422271360 [ 0.013136] Hardware name: Loongson Loongson-3A5000-7A1000-1w-V0.1-CRB/Loongson-LS3A5000-7A1000-1w-EVB-V1.21, BIOS Loongson-UDK2018-V2.0.04082-beta7 04/27 [ 0.013140] Stack : 90000000015fc990 9000000100493c18 9000000000df3370 9000000100490000 [ 0.013151] 9000000100493b50 0000000000000000 9000000100493b58 9000000001417ef0 [ 0.013160] 900000000199e54e 0000000000000040 9000000100493c18 90000000015f7a98 [ 0.013168] ffffffffffffffff 6de72f8b42179d1e 9000000100403b80 90000000015f7890 [ 0.013176] 0000000000000001 00000000fffff175 9000000000eb9860 9000000001530b4b [ 0.013184] 9000000000e99e60 0000000000000013 0000000006ecc000 0000000000000001 [ 0.013193] 90000000015f7a98 9000000001417ef0 0000000000000004 0000000000000000 [ 0.013201] 0000000000000cc0 0000000000000000 0000000000000001 90000000015fc990 [ 0.013209] 9000000000217e74 9000000001603b6b 9000000000208640 0000000000000000 [ 0.013217] 00000000000000b0 0000000000000004 0000000000000000 0000000000070000 [ 0.013225] ... [ 0.013229] Call Trace: [ 0.013230] [<9000000000208640>] show_stack+0x4c/0x14c [ 0.013240] [<9000000000df3370>] dump_stack_lvl+0x70/0xac [ 0.013246] [<9000000000270c8c>] ___might_sleep+0x104/0x124 [ 0.013253] [<9000000000477e84>] __alloc_pages+0x240/0x464 [ 0.013260] [<9000000000214214>] setup_tlb_handler+0x104/0x1e8 [ 0.013265] [<9000000000214324>] tlb_init+0x2c/0x3c [ 0.013270] [<9000000000208b74>] per_cpu_trap_init+0xec/0x108 [ 0.013275] [<9000000000202850>] cpu_probe+0x400/0x8a4 [ 0.013279] [<900000000020d160>] start_secondary+0x5c/0x3d4 Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-25LoongArch: Fix the _stext symbol addressHuacai Chen2-2/+1
_stext means the start of .text section (see __is_kernel_text()), but we put its definition in .ref.text by mistake. Fix it by defining it in the vmlinux.lds.S. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-25LoongArch: Fix the !THP buildHuacai Chen1-5/+5
Fix the !THP build by making pmd_pfn() available in all configurations. Because pmd_pfn() is used in mm/page_vma_mapped.c whether or not THP is configured. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-17LoongArch: vmlinux.lds.S: Add missing ELF_DETAILSYouling Tang1-0/+1
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>
2022-06-08LoongArch: Remove MIPS comment about cycle counterJason A. Donenfeld1-7/+0
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>
2022-06-08LoongArch: Fix copy_thread() build errorsHuacai Chen1-6/+8
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>
2022-06-08LoongArch: Fix the !CONFIG_SMP buildHuacai Chen9-23/+23
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>
2022-06-03LoongArch: Add Loongson-3 default config fileHuacai Chen2-0/+773
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>
2022-06-03LoongArch: Add Non-Uniform Memory Access (NUMA) supportHuacai Chen17-29/+844
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>
2022-06-03LoongArch: Add multi-processor (SMP) supportHuacai Chen26-10/+1549
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>
2022-06-03LoongArch: Add VDSO and VSYSCALL supportHuacai Chen15-0/+622
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>
2022-06-03LoongArch: Add some library functionsHuacai Chen6-0/+282
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>
2022-06-03LoongArch: Add misc common routinesHuacai Chen7-0/+734
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>
2022-06-03LoongArch: Add ELF and module supportHuacai Chen12-0/+1043
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>
2022-06-03LoongArch: Add signal handling supportHuacai Chen4-0/+658
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>
2022-06-03LoongArch: Add system call supportHuacai Chen7-0/+531
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>
2022-06-03LoongArch: Add memory managementHuacai Chen26-0/+3172
Add memory management support for LoongArch, including: cache and tlb management, page fault handling and ioremap/mmap support. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add process managementHuacai Chen14-0/+1865
Add process management support for LoongArch, including: thread info definition, context switch and process tracing. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add exception/interrupt handlingHuacai Chen16-0/+1575
Add the exception and interrupt handling machanism for basic LoongArch support. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add boot and setup routinesHuacai Chen18-0/+1738
Add basic boot, setup and reset routines for LoongArch. Now, LoongArch machines use UEFI-based firmware. The firmware passes configuration information to the kernel via ACPI and DMI/SMBIOS. Currently an existing interface between the kernel and the bootloader is implemented. Kernel gets 2 values from the bootloader, passed in registers a0 and a1; a0 is an "EFI boot flag" distinguishing UEFI and non-UEFI firmware, while a1 is a pointer to an FDT with systable, memmap, cmdline and initrd information. The standard UEFI boot protocol (EFISTUB) will be added later. Cc: linux-efi@vger.kernel.org Cc: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Co-developed-by: Yun Liu <liuyun@loongson.cn> Signed-off-by: Yun Liu <liuyun@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add other common headersHuacai Chen17-0/+915
Add some other common headers for basic LoongArch support. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add atomic/locking headersHuacai Chen7-0/+756
Add common headers (atomic, bitops, barrier and locking) for basic LoongArch support. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add CPU definition headersHuacai Chen8-0/+2191
Add common headers (CPU definition and address space layout) for basic LoongArch support. Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03LoongArch: Add build infrastructureHuacai Chen16-0/+700
Add Kbuild, Makefile, Kconfig and link script for LoongArch build infrastructure. Reviewed-by: Guo Ren <guoren@kernel.org> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-09 19:59:25 +0300