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With csky-gcc -pg -mbacktrace, ftrace call graph supported.
Signed-off-by: Guo Ren <[email protected]>
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When gcc with -pg, it'll add _mcount stub in every function. We need
implement the _mcount in kernel and ftrace depends on stackstrace.
To do: call-graph, dynamic ftrace
Signed-off-by: Guo Ren <[email protected]>
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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 <[email protected]>
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The gcc option "-mbacktrace" will push fp(r8),lr into stack and we could
unwind the stack with:
fp = *fp
lr = (unsigned int *)fp[1]
Signed-off-by: Guo Ren <[email protected]>
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This is a simple implement of CPU-hotplug for power saving. CPU use
wait instruction to enter power saving mode and waiting for IPI wakeup
signal.
Signed-off-by: Guo Ren <[email protected]>
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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 <[email protected]>
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In gdb/bfd elf32-csky.c, csky_elf_grok_prstatus() use fixed size of
elf_prstatus. It's 148 for abiv1 and 220 for abiv2, the size is enough
for coredump and no need full sizeof(struct pt_regs).
Signed-off-by: Guo Ren <[email protected]>
Reported-by: Lu Baoquan <[email protected]>
Reported-by: Liu Mao <[email protected]>
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syscall_get_arch() is required to be implemented on all architectures
in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO
request.
Cc: Guo Ren <[email protected]>
Cc: Paul Moore <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Elvira Khabirova <[email protected]>
Cc: Eugene Syromyatnikov <[email protected]>
Cc: [email protected]
Signed-off-by: Dmitry V. Levin <[email protected]>
Signed-off-by: Guo Ren <[email protected]>
arch/csky/include/asm/syscall.h | 7 +++++++
include/uapi/linux/audit.h | 1 +
2 files changed, 8 insertions(+)
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The uapi/linux/audit.h header is going to use EM_CSKY in order
to define AUDIT_ARCH_CSKY which is needed to implement
syscall_get_arch() which in turn is required to extend
the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
The value for EM_CSKY has been taken from arch/csky/include/asm/elf.h
and confirmed by binutils:include/elf/common.h
Cc: Guo Ren <[email protected]>
Cc: Oleg Nesterov <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Elvira Khabirova <[email protected]>
Cc: Eugene Syromyatnikov <[email protected]>
Signed-off-by: Dmitry V. Levin <[email protected]>
Signed-off-by: Guo Ren <[email protected]>
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It's wrong to mask/unmask highest bit in addr to translate the vaddr
to paddr. We should use PAGE_OFFSET and PHYS_OFFSET.
Wrong implement:
return ((get_pgd()|(1<<31)) - PHYS_OFFSET) & ~1;
When PHYS_OFFSET=0xc0000000 and get_pgd() return 0xe0000000, it'll
return 0x60000000. It's wrong and should be 0xa0000000.
Now correct it to:
return ((get_pgd() - PHYS_OFFSET) & ~1) + PAGE_OFFSET;
Signed-off-by: Guo Ren <[email protected]>
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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.
[[email protected]: fix arch/csky/include/asm/processor.h]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Nick Desaulniers <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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This patch adds csky registers' definition, bitops, byteorder,
asm-offsets codes.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds boot, ipi, hotplug codes for SMP.
Signed-off-by: Guo Ren <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds arch ptrace implementation, stack dump and bug.h.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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The patch adds "user access from kernel" codes.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds string optimize codes and some auxiliary codes.
Signed-off-by: Chen Linfei <[email protected]>
Signed-off-by: Mao Han <[email protected]>
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds ELF definition and module relocate codes.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds atomic, cmpxchg, spinlock files.
Signed-off-by: Guo Ren <[email protected]>
Cc: Andrea Parri <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Reviewed-by: Peter Zijlstra <[email protected]>
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This patch adds IRQ handling files.
Signed-off-by: Guo Ren <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds files related to VDSO and our VDSO only support
rt_sigreturn.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds files related to task_switch, sigcontext, signal,
fpu context switch.
Signed-off-by: Guo Ren <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Eric W. Biederman <[email protected]>
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This patch adds files related to memory management and here is our
memory-layout:
Fixmap : 0xffc02000 – 0xfffff000 (4 MB - 12KB)
Pkmap : 0xff800000 – 0xffc00000 (4 MB)
Vmalloc : 0xf0200000 – 0xff000000 (238 MB)
Lowmem : 0x80000000 – 0xc0000000 (1GB)
abiv1 CPU (CK610) is VIPT cache and it doesn't support highmem.
abiv2 CPUs are all PIPT cache and they could support highmem.
Lowmem is directly mapped by msa0 & msa1 reg, and we needn't setup
memory page table for it.
Link:https://lore.kernel.org/lkml/[email protected]/
Signed-off-by: Guo Ren <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds cache and tlb sync codes for abiv1 & abiv2.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds files related to syscall.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds exception handling code, cpuinfo and mm-fault code.
Signed-off-by: Guo Ren <[email protected]>
Reviewed-by: Arnd Bergmann <[email protected]>
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This patch adds Makefile, Kconfig for build infrastructure.
Signed-off-by: Guo Ren <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
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