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  1. 22 4月, 2019 11 次提交
    • G
      csky: Support dynamic start physical address · f62e3162
      由 Guo Ren 提交于 
      Before this patch csky-linux need CONFIG_RAM_BASE to determine start
physical address. Now we use phys_offset variable to replace the macro
of PHYS_OFFSET and we setup phys_offset with real physical address which
is determined during startup in head.S.

With this patch we needn't re-compile kernel for different start
physical address. ie: 0x0 / 0xc0000000 start physical address could use
the same vmlinux, be care different start address must be 512MB aligned.
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
      f62e3162
    • G
      csky: Reconstruct signal processing · bf241682
      由 Guo Ren 提交于 
      Linux kernel has provided some apis for arch signal's implementation.
For example:
	restore_saved_sigmask()
	set_current_blocked()
	restore_altstack()

But in last version of csky signal.c didn't use them and some codes are
confusing, so reconstruct signal.c with reference to riscv's code.

Now csky signal.c implementation are very close to riscv and we can
get the following benefits:
 - Clear code structure
 - The signal code of riscv and csky can be reviewed together
 - Promoting the unification of arch's signal implementation

Also modified the related code in entry.S
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
      bf241682
    • G
      csky: Use in_syscall & forget_syscall instead of r11_sig · f4625ee0
      由 Guo Ren 提交于 
      We could use regs->sr 16-24 bits to detect syscall: VEC_TRAP0 and
r11_sig is no necessary for current implementation.

In this patch, we implement the in_syscall and forget_syscall which are
inspired from arm & nds32, but csky pt_regs has no syscall_num element
and we just set zero to regs->sr's vector-bits-field instead.

For ret_from_fork, current task was forked from parent which is in syscall
progress and its regs->sr has been already setted with VEC_TRAP0. See:
arch/csky/kernel/process.c: copy_thread()
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
      f4625ee0
    • G
      csky: Add non-uapi asm/ptrace.h namespace · f335b10f
      由 Guo Ren 提交于 
      Move #ifdef __KERNEL__ code in the uapi namespace to non-uapi
include/asm/ptrace.h namespace and remove #ifdef __KERNEL__ in
include/asm/ptrace.h. Seperate ptrace.h in uapi and non-uapi is more
common and clear.
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
Cc: Dmitry V. Levin <ldv@altlinux.org>
      f335b10f
    • J
      csky: mm/fault.c: Remove duplicate header · ce63cd5b
      由 Jagadeesh Pagadala 提交于 
      Remove duplicate header which is included twice.
Signed-off-by: NJagadeesh Pagadala <jagdsh.linux@gmail.com>
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
      ce63cd5b
    • M
      csky: remove redundant generic-y · 1b2707fb
      由 Masahiro Yamada 提交于 
      Since commit 7cbbbb8b ("kbuild: warn redundant generic-y"),
redundant generic-y is reported. I missed to delete this one.

scripts/Makefile.asm-generic:25: redundant generic-y found in arch/csky/include/asm/Kbuild: ftrace.h

In this case, csky-specific implementation exists in
arch/csky/include/asm/ftrace.h
Signed-off-by: NMasahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
      1b2707fb
    • G
      csky: Update syscall_trace_enter/exit implementation · 2f7932b0
      由 Guo Ren 提交于 
      Previous syscall_trace implementation couldn't support AUDITSYSCALL and
SYSCALL_TRACEPOINTS. Now we redesign it to support audit_syscall
and syscall_tracepoints just like other archs'.
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
Cc: Dmitry V. Levin <ldv@altlinux.org>
Cc: Arnd Bergmann <arnd@arndb.de>
      2f7932b0
    • M
      csky: Add perf callchain support · cfa4d93b
      由 Mao Han 提交于 
      This patch add support for perf callchain sampling on csky platform.
As fp is used to unwind the stack, the program being sampled and the
C library need to be compiled with -mbacktrace for user callchains,
kernel callchains require CONFIG_STACKTRACE = y.

Changelog:
 - Coding convention with Christoph's advice for riscv's.
Signed-off-by: NMao Han <han_mao@c-sky.com>
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
Cc: Christoph Hellwig <hch@infradead.org>
      cfa4d93b
    • G
      csky/ftrace: Add dynamic function tracer (include graph tracer) · 28bb030f
      由 Guo Ren 提交于 
      Support dynamic ftrace including dynamic graph tracer. Gcc-csky with -pg
will produce call site in every function prologue and we can use these
call site to hook trace function.

gcc with -pg origin call site:
	push	lr
	jbsr	_mcount
	nop32
	nop32

If the (callee - caller)'s offset is in range of bsr instruction, we'll
modify code with:
	push	lr
	bsr	_mcount
	nop32
	nop32
Else if the (callee - caller)'s offset is out of bsr instrunction, we'll
modify code with:
	push	lr
	movih	r26, ...
	ori	r26, ...
	jsr	r26

(r26 is reserved for jsr link reg in csky abiv2 spec.)
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
      28bb030f
    • G
      csky: Fixup vdsp&fpu issues in kernel · 3dfc242f
      由 Guo Ren 提交于 
      This fixup is continue to commit 35ff802a (csky: fixup remove
vdsp implement for kernel.) and in that patch I didn't finish the
job. We must forbid gcc to generate any vdsp & fpu instructions
and remove vdsp asm in memmove.S.

eg: For GCC it's -mcpu=ck860 and For AS it's -Wa,-mcpu=ck860fv
Signed-off-by: NGuo Ren <ren_guo@c-sky.com>
      3dfc242f
    • L
      Linux 5.1-rc6 · 085b7755
      由 Linus Torvalds 提交于
      085b7755
  3. 21 4月, 2019 10 次提交
  5. 20 4月, 2019 19 次提交