linux.git/arch/mips/Makefile, branch v5.4.168

mips: Fix non-POSIX regexp

2021-08-12T11:20:57+00:00

[ Upstream commit 28bbbb9875a35975904e46f9b06fa689d051b290 ]

When cross compiling a MIPS kernel on a BSD based HOSTCC leads
to errors like

  SYNC    include/config/auto.conf.cmd - due to: .config
egrep: empty (sub)expression
  UPD     include/config/kernel.release
  HOSTCC  scripts/dtc/dtc.o - due to target missing

It turns out that egrep uses this egrep pattern:

		(|MINOR_|PATCHLEVEL_)

This is not valid syntax or gives undefined results according
to POSIX 9.5.3 ERE Grammar

	https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html

It seems to be silently accepted by the Linux egrep implementation
while a BSD host complains.

Such patterns can be replaced by a transformation like

	"(|p1|p2)" -> "(p1|p2)?"

Fixes: 48c35b2d245f ("[MIPS] There is no __GNUC_MAJOR__")
Signed-off-by: H. Nikolaus Schaller 
Signed-off-by: Masahiro Yamada 
Signed-off-by: Sasha Levin

MIPS: Truncate link address into 32bit for 32bit kernel

2020-06-22T07:31:03+00:00

[ Upstream commit ff487d41036035376e47972c7c522490b839ab37 ]

LLD failed to link vmlinux with 64bit load address for 32bit ELF
while bfd will strip 64bit address into 32bit silently.
To fix LLD build, we should truncate load address provided by platform
into 32bit for 32bit kernel.

Signed-off-by: Jiaxun Yang 
Link: https://github.com/ClangBuiltLinux/linux/issues/786
Link: https://sourceware.org/bugzilla/show_bug.cgi?id=25784
Reviewed-by: Fangrui Song 
Reviewed-by: Kees Cook 
Tested-by: Nathan Chancellor 
Cc: Maciej W. Rozycki 
Tested-by: Nick Desaulniers 
Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Sasha Levin

MIPS: Remove unused R8000 CPU support

2019-07-23T21:33:51+00:00

Our R8000 CPU support can only be included if a system selects
CONFIG_SYS_HAS_CPU_R8000. No system does, making all R8000-related CPU
support dead code. Remove it.

Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org

MIPS: Remove unused R5432 CPU support

2019-07-23T21:33:34+00:00

Our R5432 CPU support can only be included if a system selects
CONFIG_SYS_HAS_CPU_R5432. No system does, making all R5432-related CPU
support dead code. Remove it.

Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org

MIPS: Remove unused R4300 CPU support

2019-07-23T21:33:23+00:00

Our R4300 CPU support can only be included if a system selects
CONFIG_SYS_HAS_CPU_R4300. No system does, making all R4300-related CPU
support dead code. Remove it.

Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org

MIPS: have "plain" make calls build dtbs for selected platforms

2019-06-20T21:52:56+00:00

scripts/package/builddeb calls "make dtbs_install" after executing
a plain make (i.e. no build targets specified). It will fail if dtbs
were not built beforehand. Match the arm64 architecture where DTBs get
built by the "all" target.

Signed-off-by: Cedric Hombourger 
[paul.burton@mips.com: s/builddep/builddeb]
Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org
Cc: stable@vger.kernel.org # v4.1+

MIPS: Add GINVT instruction helpers

2019-02-04T18:56:35+00:00

Add a family of ginvt_* functions making it easy to emit a GINVT
instruction to globally invalidate TLB entries. We make use of the
_ASM_MACRO infrastructure to support emitting the instructions even if
the assembler isn't new enough to support them natively.

An associated STYPE_GINV definition & sync_ginv() function are added to
emit a sync instruction of type 0x14, which operates as a completion
barrier for these new GINVT (and GINVI) instructions.

Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org

mips: generate uapi header and system call table files

2018-12-14T19:19:02+00:00

System call table generation script must be run to gener-
ate unistd_(nr_)n64/n32/o32.h and syscall_table_32_o32/
64_n64/64_n32/64-o32.h files. This patch will have changes
which will invokes the script.

This patch will generate unistd_(nr_)n64/n32/o32.h and
syscall_table_32_o32/64_n64/64-n32/64-o32.h files by the
syscall table generation script invoked by parisc/Make-
file and the generated files against the removed files
must be identical.

The generated uapi header file will be included in uapi/-
asm/unistd.h and generated system call table header file
will be included by kernel/scall32-o32/64-n64/64-n32/-
64-o32.Sfile.

Signed-off-by: Firoz Khan 
Signed-off-by: Paul Burton 
Cc: linux-mips@vger.kernel.org
Cc: Ralf Baechle 
Cc: James Hogan 
Cc: Greg Kroah-Hartman 
Cc: Philippe Ombredanne 
Cc: Thomas Gleixner 
Cc: Kate Stewart 
Cc: y2038@lists.linaro.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: arnd@arndb.de
Cc: deepa.kernel@gmail.com
Cc: marcin.juszkiewicz@linaro.org

MIPS: Don't compile math-emu when CONFIG_MIPS_FP_SUPPORT=n

2018-11-09T18:23:18+00:00

When CONFIG_MIPS_FP_SUPPORT=n we don't support floating point, so
there's no point compiling in our FPU emulator. Avoid doing so,
providing stub versions of dsemul cleanup functions that are called from
signal & task handling code.

Signed-off-by: Paul Burton 
Patchwork: https://patchwork.linux-mips.org/patch/21012/
Cc: linux-mips@linux-mips.org

kbuild: replace cc-name test with CONFIG_CC_IS_CLANG

2018-11-02T13:49:00+00:00

Evaluating cc-name invokes the compiler every time even when you are
not compiling anything, like 'make help'. This is not efficient.

The compiler type has been already detected in the Kconfig stage.
Use CONFIG_CC_IS_CLANG, instead.

Signed-off-by: Masahiro Yamada 
Acked-by: Michael Ellerman  (powerpc)
Acked-by: Paul Burton  (MIPS)
Acked-by: Joel Stanley