linux-stable.git/arch/nds32/include/uapi, branch linux-5.0.y

arch: remove redundant UAPI generic-y defines

2019-01-06T01:22:15+00:00

Now that Kbuild automatically creates asm-generic wrappers for missing
mandatory headers, it is redundant to list the same headers in
generic-y and mandatory-y.

Suggested-by: Sam Ravnborg 
Signed-off-by: Masahiro Yamada 
Acked-by: Sam Ravnborg

arch: remove stale comments "UAPI Header export list"

2019-01-06T00:46:51+00:00

These comments are leftovers of commit fcc8487d477a ("uapi: export all
headers under uapi directories").

Prior to that commit, exported headers must be explicitly added to
header-y. Now, all headers under the uapi/ directories are exported.

Signed-off-by: Masahiro Yamada

nds32: support denormalized result through FP emulator

2018-11-22T10:13:27+00:00

Currently, the nds32 FPU dose not support the arithmetic of denormalized
number. When the nds32 FPU finds the result of the instruction is a
denormlized number, the nds32 FPU considers it to be an underflow condition
and rounds the result to an appropriate number. It may causes some loss
of precision. This commit proposes a solution to re-execute the
instruction by the FPU emulator to enhance the precision. To transfer
calculations from user space to kernel space, this feature will enable
the underflow exception trap by default. Enabling this feature may cause
some side effects:
  1. Performance loss due to extra FPU exception
  2. Need another scheme to control real underflow trap
       A new parameter, UDF_trap, which is belong to FPU context is used
     to control underflow trap.

User can configure this feature via CONFIG_SUPPORT_DENORMAL_ARITHMETIC

Signed-off-by: Vincent Chen 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu

nds32: nds32 FPU port

2018-11-22T10:13:13+00:00

This patch set contains basic components for supporting the nds32 FPU,
such as exception handlers and context switch for FPU registers. By
default, the lazy FPU scheme is supported and the user can configure it via
CONFIG_LZAY_FPU.

Signed-off-by: Vincent Chen 
Acked-by: Greentime Hu 
Signed-off-by: Greentime Hu

y2038: Remove stat64 family from default syscall set

2018-08-29T13:42:20+00:00

New architectures should no longer need stat64, which is not y2038
safe and has been replaced by statx(). This removes the 'select
__ARCH_WANT_STAT64' statement from asm-generic/unistd.h and instead
moves it into the respective asm/unistd.h UAPI header files for each
architecture that uses it today.

In the generic file, the system call number and entry points are now
made conditional, so newly added architectures (e.g. riscv32 or csky)
will never need to carry backwards compatiblity for it.

arm64 is the only 64-bit architecture using the asm-generic/unistd.h
file, and it already sets __ARCH_WANT_NEW_STAT in its headers, and I
use the same #ifdef here: future 64-bit architectures therefore won't
see newstat or stat64 any more. They don't suffer from the y2038 time_t
overflow, but for consistency it seems best to also let them use statx().

Signed-off-by: Arnd Bergmann

nds32: Build infrastructure

2018-02-22T02:44:35+00:00

This patch adds Makefile, Kconfig and vmlinux.lds.S files required for building
an nds32 kernel.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: Miscellaneous header files

2018-02-22T02:44:34+00:00

This patch introduces some miscellaneous header files.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: Debugging support

2018-02-22T02:44:34+00:00

This patch adds ptrace support.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Acked-by: Arnd Bergmann

nds32: Signal handling support

2018-02-22T02:44:33+00:00

This patch adds support for signal handling.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu

nds32: System calls handling

2018-02-22T02:44:33+00:00

This patch adds support for system calls.

Signed-off-by: Vincent Chen 
Signed-off-by: Greentime Hu 
Reviewed-by: Arnd Bergmann