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* printk: stop including cache.h from printk.hPeter Collingbourne2022-05-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An inclusion of cache.h in printk.h was added in 2014 in commit c28aa1f0a847 ("printk/cache: mark printk_once test variable __read_mostly") in order to bring in the definition of __read_mostly. The usage of __read_mostly was later removed in commit 3ec25826ae33 ("printk: Tie printk_once / printk_deferred_once into .data.once for reset") which made the inclusion of cache.h unnecessary, so remove it. We have a small amount of code that depended on the inclusion of cache.h from printk.h; fix that code to include the appropriate header. This fixes a circular inclusion on arm64 (linux/printk.h -> linux/cache.h -> asm/cache.h -> linux/kasan-enabled.h -> linux/static_key.h -> linux/jump_label.h -> linux/bug.h -> asm/bug.h -> linux/printk.h) that would otherwise be introduced by the next patch. Build tested using {allyesconfig,defconfig} x {arm64,x86_64}. Link: https://linux-review.googlesource.com/id/I8fd51f72c9ef1f2d6afd3b2cbc875aa4792c1fba Link: https://lkml.kernel.org/r/20220427195820.1716975-1-pcc@google.com Signed-off-by: Peter Collingbourne <pcc@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: David Rientjes <rientjes@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kees Cook <keescook@chromium.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* uaccess: remove CONFIG_SET_FSArnd Bergmann2022-02-251-2/+0
| | | | | | | | | | | | | | | | | | There are no remaining callers of set_fs(), so CONFIG_SET_FS can be removed globally, along with the thread_info field and any references to it. This turns access_ok() into a cheaper check against TASK_SIZE_MAX. As CONFIG_SET_FS is now gone, drop all remaining references to set_fs()/get_fs(), mm_segment_t, user_addr_max() and uaccess_kernel(). Acked-by: Sam Ravnborg <sam@ravnborg.org> # for sparc32 changes Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Tested-by: Sergey Matyukevich <sergey.matyukevich@synopsys.com> # for arc changes Acked-by: Stafford Horne <shorne@gmail.com> # [openrisc, asm-generic] Acked-by: Dinh Nguyen <dinguyen@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* sched: Add wrapper for get_wchan() to keep task blockedKees Cook2021-10-151-1/+1
| | | | | | | | | | | | | Having a stable wchan means the process must be blocked and for it to stay that way while performing stack unwinding. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [arm] Tested-by: Mark Rutland <mark.rutland@arm.com> [arm64] Link: https://lkml.kernel.org/r/20211008111626.332092234@infradead.org
* csky: Fixup compile errorGuo Ren2021-02-271-1/+0
| | | | | | | | | : error: C++ style comments are not allowed in ISO C90 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. ^ error: (this will be reported only once per input file) Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
* csky: Add memory layout 2.5G(user):1.5G(kernel)Guo Ren2021-01-121-1/+1
| | | | | | | | | | | | There are two ways for translating va to pa for csky: - Use TLB(Translate Lookup Buffer) and PTW (Page Table Walk) - Use SSEG0/1 (Simple Segment Mapping) We use tlb mapping 0-2G and 3G-4G virtual address area and SSEG0/1 are for 2G-2.5G and 2.5G-3G translation. We could disable SSEG0 to use 2G-2.5G as TLB user mapping. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
* csky: remove unusued thread_saved_pc and *_segments functions/macrosTobias Klauser2020-07-311-6/+0
| | | | | | | | | | | | | | | These are used nowhere in the tree (except for some architectures which define them for their own use) and were already removed for other architectures in: commit 6474924e2b5d ("arch: remove unused macro/function thread_saved_pc()") commit c17c02040bf0 ("arch: remove unused *_segments() macros/functions") Remove them from arch/csky as well. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Guo Ren <guoren@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de>
* csky: Fixup gdbmacros.txt with name sp in thread_structGuo Ren2020-05-151-2/+2
| | | | | | | | | | The gdbmacros.txt use sp in thread_struct, but csky use ksp. This cause bttnobp fail to excute. TODO: - Still couldn't display the contents of stack. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
* csky: Fixup remove unnecessary save/restore PSR codeGuo Ren2020-05-131-2/+0
| | | | | | | | | All processes' PSR could success from SETUP_MMU, so need set it in INIT_THREAD again. And use a3 instead of r7 in __switch_to for code convention. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
* csky: Fixup get wrong psr value from phyical regGuo Ren2020-04-011-0/+1
| | | | | | | | We should get psr value from regs->psr in stack, not directly get it from phyiscal register then save the vector number in tsk->trap_no. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
* csky: coding convention: Use task_stack_pageGuo Ren2019-02-131-2/+2
| | | | | | | Use task_stack_page instead of p->stack to get stack. Follow the coding convention style. Also for init_stack, the same with other archs. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
* csky: remove unused members in processor.hGuo Ren2018-12-311-12/+0
| | | | | | | | Cleanup struct cpuinfo_csky and struct thread_struct, remove all esp0 related code. We could get pt_regs from sp and backtrace could use fp in switch_stack. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
* csky: fixup save hi,lo,dspcr regs in switch_stack.Guo Ren2018-12-311-2/+1
| | | | | | | | HI, LO, DSPCR registers are 807/810 related regs and no need for 610/860. All of the regs must be saved in pt_regs and switch_stack. This patch fixup saving dspcr reg in switch_stack and pt_regs. Signed-off-by: Guo Ren <ren_guo@c-sky.com>
* treewide: remove current_text_addrNick Desaulniers2018-10-311-6/+0
| | | | | | | | | | | | | | | | | Prefer _THIS_IP_ defined in linux/kernel.h. Most definitions of current_text_addr were the same as _THIS_IP_, but a few archs had inline assembly instead. This patch removes the final call site of current_text_addr, making all of the definitions dead code. [akpm@linux-foundation.org: fix arch/csky/include/asm/processor.h] Link: http://lkml.kernel.org/r/20180911182413.180715-1-ndesaulniers@google.com Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* csky: Process management and SignalGuo Ren2018-10-261-0/+121
This patch adds files related to task_switch, sigcontext, signal, fpu context switch. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Eric W. Biederman <ebiederm@xmission.com>
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