linux.git/arch/mips/Makefile, branch v3.17

MIPS: SmartMIPS: Disable assembler warnings

2014-09-17T12:29:03+00:00

The kernel code overrides the default ISA as passed by the compiler
in quite a few places. This has unfortunate side effects when smartmips
is enabled leading to hundreds of warnings during build such as:

{standard input}: Assembler messages:
{standard input}:411: Warning: the `smartmips' extension requires MIPS32
revision 1 or greater
{standard input}: Assembler messages:
{standard input}:43: Warning: the 64-bit MIPS architecture does not support the
`smartmips' extension
[...]

Until the kernel code is fixed properly (if possible), disable all the
assembler warning messages to make the build logs readable again.
This has no runtime side effects but it makes it easier to spot
more critical warnings and problems during build.

Signed-off-by: Markos Chandras 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7356/
Signed-off-by: Ralf Baechle

MIPS: SB1: Check optional compilation flags one by one

2014-07-30T13:53:49+00:00

This fixes a regression caused by commit
bb6c0bd3fdb67c8a1fceea1d4700b9ee593309f9 [MIPS: SB1: Fix excessive kernel
warnings.], that makes `-march=r5000' selected for compilation flags
rather than supposed `-march=sb1' with compilers that do not support the
ASE selection flags introduced with that change.

For example GCC 4.1.2 supports `-mips3d'/`-mno-mips3d' (and obviously
`-march=sb1'), however it does not support `-mdmx'/`-mno-mdmx'.  As a
result the whole selection of flags fails and compilation resorts to using
`-march=r5000', meant for really old compilers indeed only.

It is always best to pick the flags individually unless we are absolutely
sure a set of flags was introduced to the toolchain together (`-march=sb1'
and `-mtune=sb1' would be a good example), and this change makes it happen
for CONFIG_CPU_SB1.  Consequently the flags ultimately selected with GCC
4.1.2 are `-march=sb1 -Wa,--trap -mno-mips3d'

Signed-off-by: Maciej W. Rozycki 
Cc: Richard Sandiford 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7223/
Signed-off-by: Ralf Baechle

Merge branch '3.15-fixes' into mips-for-linux-next

2014-06-04T20:53:02+00:00

MIPS: Fix MSA toolchain support detection.

2014-06-03T19:19:28+00:00

The '-mmsa' option is not supported by all current compilers. Change
the detection to instead pass the option directly to the assembler.

Signed-off-by: Steven J. Hill 
Reviewed-by: Paul Burton 
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/6835/
Signed-off-by: Ralf Baechle

MIPS: SB1: Fix excessive kernel warnings.

2014-05-28T06:42:23+00:00

A kernel build with binutils 2.24 is going to emit warnings like

  CC      kernel/sys.o
{standard input}: Assembler messages:
{standard input}:701: Warning: the 32-bit MIPS architecture does not support the `mdmx' extension
{standard input}:701: Warning: the `mdmx' extension requires 64-bit FPRs
{standard input}:701: Warning: the `mips3d' extension requires MIPS32 revision 2 or greater
{standard input}:701: Warning: the `mips3d' extension requires 64-bit FPRs

for almost every file.  This is caused by changes to gas' interpretation
of .set semantics.  Fixed by explicitly disabling MIPS3D and MDMX for
Sibyte builds.

Signed-off-by: Ralf Baechle

MIPS: math-emu: Move various objects into an ar library.

2014-05-23T13:11:14+00:00

ieee754d.o contains only debug code and dp_sqrt.o and sp_sqrt.o contain
code which for MIPS I/II/III systems we don't want to link.  Again the
savings can be considerable for some systems:

$ mips-linux-size --totals ieee754d.o dp_sqrt.o sp_sqrt.o
   text	   data	    bss	    dec	    hex	filename
   1624	      0	      0	   1624	    658	ieee754d.o
   2016	      0	      0	   2016	    7e0	dp_sqrt.o
    736	      0	      0	    736	    2e0	sp_sqrt.o
   4376	      0	      0	   4376	   1118	(TOTALS)

Signed-off-by: Ralf Baechle

MIPS: Add MSA register definitions & access

2014-03-26T22:09:10+00:00

This patch introduces definitions for the MSA control registers and
functions which allow access to both the control & vector registers. If
the toolchain being used to build the kernel includes support for MSA
then this patch will make use of that support & use MSA instructions
directly. However toolchain support for MSA is very new & far from a
point where it can be reasonably expected that everyone building the
kernel uses a toolchain with support. Thus fallbacks using .word
assembler directives are also provided for now as a temporary measure.

Signed-off-by: Paul Burton 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6429/
Patchwork: https://patchwork.linux-mips.org/patch/6607/
Signed-off-by: Ralf Baechle

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2014-01-31T01:20:32+00:00

Pull MIPS updates from Ralf Baechle:
 "The most notable new addition inside this pull request is the support
  for MIPS's latest and greatest core called "inter/proAptiv".  The
  patch series describes this core as follows.

    "The interAptiv is a power-efficient multi-core microprocessor
     for use in system-on-chip (SoC) applications. The interAptiv combines
     a multi-threading pipeline with a coherence manager to deliver improved
     computational throughput and power efficiency. The interAptiv can
     contain one to four MIPS32R3 interAptiv cores, system level
     coherence manager with L2 cache, optional coherent I/O port,
     and optional floating point unit."

  The platform specific patches touch all 3 Broadcom families.  It adds
  support for the new Broadcom/Netlogix XLP9xx Soc, building a common
  BCM63XX SMP kernel for all BCM63XX SoCs regardless of core type/count
  and full gpio button/led descriptions for BCM47xx.

  The rest of the series are cleanups and bug fixes that are MIPS
  generic and consist largely of changes that Imgtec/MIPS had published
  in their linux-mti-3.10.git stable tree.  Random other cleanups and
  patches preparing code to be merged in 3.15"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (139 commits)
  mips: select ARCH_MIGHT_HAVE_PC_SERIO
  mips: delete non-required instances of include 
  MIPS: KVM: remove shadow_tlb code
  MIPS: KVM: use common EHINV aware UNIQUE_ENTRYHI
  mips/ide: flush dcache also if icache does not snoop dcache
  MIPS: BCM47XX: fix position of cpu_wait disabling
  MIPS: BCM63XX: select correct MIPS_L1_CACHE_SHIFT value
  MIPS: update MIPS_L1_CACHE_SHIFT based on MIPS_L1_CACHE_SHIFT_
  MIPS: introduce MIPS_L1_CACHE_SHIFT_
  MIPS: ZBOOT: gather string functions into string.c
  arch/mips/pci: don't check resource with devm_ioremap_resource
  arch/mips/lantiq/xway: don't check resource with devm_ioremap_resource
  bcma: gpio: don't cast u32 to unsigned long
  ssb: gpio: add own IRQ domain
  MIPS: BCM47XX: fix sparse warnings in board.c
  MIPS: BCM47XX: add board detection for Linksys WRT54GS V1
  MIPS: BCM47XX: fix detection for some boards
  MIPS: BCM47XX: Enable buttons support on SSB
  MIPS: BCM47XX: Convert WNDR4500 to new syntax
  MIPS: BCM47XX: Use "timer" trigger for status LEDs
  ...

MIPS: microMIPS: Remove unsupported compiler flag.

2014-01-23T12:02:35+00:00

Remove usage of -mno-jals compiler flag when building a pure
microMIPS kernel. The -mno-jals flag only ever existed within
Mentor toolchains. Dropping this flag allows all FSF toolchains
to work.

Signed-off-by: Steven J. Hill 
Reviewed-by: Markos Chandras 
Signed-off-by: John Crispin 
Patchwork: http://patchwork.linux-mips.org/patch/6200/

stackprotector: Unify the HAVE_CC_STACKPROTECTOR logic between architectures

2013-12-20T08:38:40+00:00

Instead of duplicating the CC_STACKPROTECTOR Kconfig and
Makefile logic in each architecture, switch to using
HAVE_CC_STACKPROTECTOR and keep everything in one place. This
retains the x86-specific bug verification scripts.

Signed-off-by: Kees Cook 
Cc: Arjan van de Ven 
Cc: Michal Marek 
Cc: Russell King 
Cc: Ralf Baechle 
Cc: Paul Mundt 
Cc: James Hogan 
Cc: Stephen Rothwell 
Cc: Shawn Guo 
Cc: Linus Torvalds 
Cc: Andrew Morton 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mips@linux-mips.org
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/1387481759-14535-2-git-send-email-keescook@chromium.org
Signed-off-by: Ingo Molnar