starfive-tech/linux.git/arch/csky/kernel/process.c, branch master

arch: setup PF_IO_WORKER threads like PF_KTHREAD

2021-02-22T00:25:22+00:00

PF_IO_WORKER are kernel threads too, but they aren't PF_KTHREAD in the sense that we don't assign ->set_child_tid with our own structure. Just ensure that every arch sets up the PF_IO_WORKER threads like kthreads in the arch implementation of copy_thread(). Signed-off-by: Jens Axboe

sched/idle: Fix arch_cpu_idle() vs tracing

2020-11-24T15:47:35+00:00

We call arch_cpu_idle() with RCU disabled, but then use local_irq_{en,dis}able(), which invokes tracing, which relies on RCU. Switch all arch_cpu_idle() implementations to use raw_local_irq_{en,dis}able() and carefully manage the lockdep,rcu,tracing state like we do in entry. (XXX: we really should change arch_cpu_idle() to not return with interrupts enabled) Reported-by: Sven Schnelle Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Mark Rutland Tested-by: Mark Rutland Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org

Merge tag 'csky-for-linus-5.9-rc1' of https://github.com/c-sky/csky-linux

2020-08-06T17:15:28+00:00

Pull arch/csky updates from Guo Ren: "New features: - seccomp-filter - err-injection - top-down&random mmap-layout - irq_work - show_ipi - context-tracking Fixes & Optimizations: - kprobe_on_ftrace - optimize panic print" * tag 'csky-for-linus-5.9-rc1' of https://github.com/c-sky/csky-linux: csky: Add context tracking support csky: Add arch_show_interrupts for IPI interrupts csky: Add irq_work support csky: Fixup warning by EXPORT_SYMBOL(kmap) csky: Set CONFIG_NR_CPU 4 as default csky: Use top-down mmap layout csky: Optimize the trap processing flow csky: Add support for function error injection csky: Fixup kprobes handler couldn't change pc csky: Fixup duplicated restore sp in RESTORE_REGS_FTRACE csky: Add cpu feature register hint for smp csky: Add SECCOMP_FILTER supported csky: remove unusued thread_saved_pc and *_segments functions/macros

csky: remove unusued thread_saved_pc and *_segments functions/macros

2020-07-31T01:50:48+00:00

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 Signed-off-by: Guo Ren Cc: Arnd Bergmann

arch: rename copy_thread_tls() back to copy_thread()

2020-07-04T21:41:37+00:00

Now that HAVE_COPY_THREAD_TLS has been removed, rename copy_thread_tls() back simply copy_thread(). It's a simpler name, and doesn't imply that only tls is copied here. This finishes an outstanding chunk of internal process creation work since we've added clone3(). Cc: linux-arch@vger.kernel.org Acked-by: Thomas Bogendoerfer A Acked-by: Stafford Horne Acked-by: Greentime Hu Acked-by: Geert Uytterhoeven A Reviewed-by: Kees Cook Signed-off-by: Christian Brauner

csky: Fixup gdbmacros.txt with name sp in thread_struct

2020-05-14T16:16:18+00:00

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

csky: Fixup calltrace panic

2020-05-13T09:55:06+00:00

The implementation of show_stack will panic with wrong fp: addr = *fp++; because the fp isn't checked properly. The current implementations of show_stack, wchan and stack_trace haven't been designed properly, so just deprecate them. This patch is a reference to riscv's way, all codes are modified from arm's. The patch is passed with: - cat /proc//stack - cat /proc//wchan - echo c > /proc/sysrq-trigger Signed-off-by: Guo Ren

csky: Implement copy_thread_tls

2020-02-21T07:43:25+00:00

This is required for clone3 which passes the TLS value through a struct rather than a register. Cc: Amanieu d'Antras Signed-off-by: Guo Ren

csky: Initial stack protector support

2020-02-21T07:43:24+00:00

This is a basic -fstack-protector support without per-task canary switching. The protector will report something like when stack corruption is detected: It's tested with strcpy local array overflow in sys_kill and get: stack-protector: Kernel stack is corrupted in: sys_kill+0x23c/0x23c TODO: - Support task switch for different cannary Signed-off-by: Mao Han Signed-off-by: Guo Ren

csky: Fixup add zero_fp fixup perf backtrace panic

2019-09-30T02:26:32+00:00

We need set fp zero to let backtrace know the end. The patch fixup perf callchain panic problem, because backtrace didn't know what is the end of fp. Signed-off-by: Guo Ren Reported-by: Mao Han