[PATCH v3] arch: Kconfig: Let all architectures set endian explicitly

From: Chen Gang <hidden>
Date: 2014-08-14 16:55:23
Also in: linux-alpha, linux-mips, linux-um
Subsystem: alpha port, arm port, arm64 port (aarch64 architecture), linux for powerpc (32-bit and 64-bit), m68k architecture, microblaze architecture, mips, openrisc architecture, parisc architecture, qualcomm hexagon architecture, s390 architecture, sparc + ultrasparc (sparc/sparc64), synopsys arc architecture, tensilica xtensa port (xtensa), the rest, user-mode linux (uml), x86 architecture (32-bit and 64-bit) · Maintainers: Richard Henderson, Matt Turner, Magnus Lindholm, Russell King, Catalin Marinas, Will Deacon, Madhavan Srinivasan, Michael Ellerman, Geert Uytterhoeven, Michal Simek, Thomas Bogendoerfer, Jonas Bonn, Stefan Kristiansson, Stafford Horne, "James E.J. Bottomley", Helge Deller, Brian Cain, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, "David S. Miller", Andreas Larsson, Vineet Gupta, Chris Zankel, Max Filippov, Linus Torvalds, Richard Weinberger, Anton Ivanov, Johannes Berg, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen

Normal architectures:

 - Big endian: avr32, frv, m68k, openrisc, parisc, s390, sparc

 - Little endian: alpha, blackfin, cris, hexagon, ia64, metag, mn10300,
                  score, unicore32, x86

 - Choose in config time: arc, arm, arm64, c6x, m32r, mips, powerpc, sh

Special architectures:

 - Deside by compiler: microblaze, tile, xtensa.

 - Deside by building host: um

 - Next, need improve Kbuild to probe endian to deside whether need mark
   __BUILDING_TIME_BIG_ENDIAN__ before real config.

Another improvements:

 - score: use '\t' instead of ' '.

 - s390: sort the select value in alpha order.

Signed-off-by: Chen Gang <redacted>
---
 arch/alpha/Kconfig      |  1 +
 arch/arc/Kconfig        |  1 +
 arch/arm/Kconfig        |  1 +
 arch/arm64/Kconfig      |  1 +
 arch/avr32/Kconfig      |  1 +
 arch/blackfin/Kconfig   |  1 +
 arch/c6x/Kconfig        |  1 +
 arch/cris/Kconfig       |  1 +
 arch/frv/Kconfig        |  1 +
 arch/hexagon/Kconfig    |  1 +
 arch/ia64/Kconfig       |  1 +
 arch/m32r/Kconfig       |  1 +
 arch/m68k/Kconfig       |  1 +
 arch/metag/Kconfig      |  1 +
 arch/microblaze/Kconfig |  2 ++
 arch/mips/Kconfig       |  1 +
 arch/mn10300/Kconfig    |  1 +
 arch/openrisc/Kconfig   |  1 +
 arch/parisc/Kconfig     |  1 +
 arch/powerpc/Kconfig    |  1 +
 arch/s390/Kconfig       |  3 ++-
 arch/score/Kconfig      | 21 +++++++++++----------
 arch/sparc/Kconfig      |  1 +
 arch/tile/Kconfig       |  2 ++
 arch/um/Kconfig.common  |  2 ++
 arch/unicore32/Kconfig  |  1 +
 arch/x86/Kconfig        |  1 +
 arch/xtensa/Kconfig     |  2 ++
 init/Kconfig            |  6 ++++++
 29 files changed, 49 insertions(+), 11 deletions(-)

diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
index b7ff9a3..1cb7426 100644
--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig

@@ -27,6 +27,7 @@ config ALPHA
 	select MODULES_USE_ELF_RELA
 	select ODD_RT_SIGACTION
 	select OLD_SIGSUSPEND
+	select CPU_LITTLE_ENDIAN
 	help
 	  The Alpha is a 64-bit general-purpose processor designed and
 	  marketed by the Digital Equipment Corporation of blessed memory,

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 9596b0a..e939abd 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig

@@ -35,6 +35,7 @@ config ARC
 	select OF_EARLY_FLATTREE
 	select PERF_USE_VMALLOC
 	select HAVE_DEBUG_STACKOVERFLOW
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 
 config TRACE_IRQFLAGS_SUPPORT
 	def_bool y

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 32cbbd5..3a806b3 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig

@@ -12,6 +12,7 @@ config ARM
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select BUILDTIME_EXTABLE_SORT if MMU
 	select CLONE_BACKWARDS
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 	select CPU_PM if (SUSPEND || CPU_IDLE)
 	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
 	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 62b4ae1..c5a91de 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig

@@ -17,6 +17,7 @@ config ARM64
 	select BUILDTIME_EXTABLE_SORT
 	select CLONE_BACKWARDS
 	select COMMON_CLK
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 	select CPU_PM if (SUSPEND || CPU_IDLE)
 	select DCACHE_WORD_ACCESS
 	select GENERIC_CLOCKEVENTS

diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index b6878eb..fab44ee 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig

@@ -17,6 +17,7 @@ config AVR32
 	select GENERIC_CLOCKEVENTS
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
+	select CPU_BIG_ENDIAN
 	help
 	  AVR32 is a high-performance 32-bit RISC microprocessor core,
 	  designed for cost-sensitive embedded applications, with particular

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index ed30699..348f16d 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig

@@ -40,6 +40,7 @@ config BLACKFIN
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
 	select HAVE_DEBUG_STACKOVERFLOW
+	select CPU_LITTLE_ENDIAN
 
 config GENERIC_CSUM
 	def_bool y

diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index 77ea09b..7e74d14 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig

@@ -17,6 +17,7 @@ config C6X
 	select OF_EARLY_FLATTREE
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 
 config MMU
 	def_bool n

diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
index 52731e2..405a097 100644
--- a/arch/cris/Kconfig
+++ b/arch/cris/Kconfig

@@ -52,6 +52,7 @@ config CRIS
 	select CLONE_BACKWARDS2
 	select OLD_SIGSUSPEND
 	select OLD_SIGACTION
+	select CPU_LITTLE_ENDIAN
 
 config HZ
 	int

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 34aa193..aa21ccc 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig

@@ -14,6 +14,7 @@ config FRV
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
 	select HAVE_DEBUG_STACKOVERFLOW
+	select CPU_BIG_ENDIAN
 
 config ZONE_DMA
 	bool

diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index 4dc89d1..ee91285 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig

@@ -28,6 +28,7 @@ config HEXAGON
 	select MODULES_USE_ELF_RELA
 	select GENERIC_CPU_DEVICES
 	select HAVE_DMA_ATTRS
+	select CPU_LITTLE_ENDIAN
 	---help---
 	  Qualcomm Hexagon is a processor architecture designed for high
 	  performance and low power across a wide variety of applications.

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index c84c88b..54f32c7 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig

@@ -49,6 +49,7 @@ config IA64
 	select MODULES_USE_ELF_RELA
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select HAVE_ARCH_AUDITSYSCALL
+	select CPU_LITTLE_ENDIAN
 	default y
 	help
 	  The Itanium Processor Family is Intel's 64-bit successor to

diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index 9e44bbd..1932483 100644
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig

@@ -16,6 +16,7 @@ config M32R
 	select ARCH_USES_GETTIMEOFFSET
 	select MODULES_USE_ELF_RELA
 	select HAVE_DEBUG_STACKOVERFLOW
+	select CPU_BIG_ENDIAN if !CPU_LITTLE_ENDIAN
 
 config SBUS
 	bool

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 87b7c75..7a7fe25 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig

@@ -23,6 +23,7 @@ config M68K
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
+	select CPU_BIG_ENDIAN
 
 config RWSEM_GENERIC_SPINLOCK
 	bool

diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index 0b389a8..e57c6a0 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig

@@ -29,6 +29,7 @@ config METAG
 	select OF
 	select OF_EARLY_FLATTREE
 	select SPARSE_IRQ
+	select CPU_LITTLE_ENDIAN
 
 config STACKTRACE_SUPPORT
 	def_bool y

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 40e1c1d..d80ae78 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig

@@ -7,6 +7,8 @@ config MICROBLAZE
 	select CLKSRC_OF
 	select CLONE_BACKWARDS3
 	select COMMON_CLK
+	select CPU_BIG_ENDIAN if __BUILDING_TIME_BIG_ENDIAN__
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CPU_DEVICES

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 900c7e5..671d822 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig

@@ -52,6 +52,7 @@ config MIPS
 	select HAVE_CC_STACKPROTECTOR
 	select CPU_PM if CPU_IDLE
 	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 
 menu "Machine selection"

diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
index a648de1..60fb249 100644
--- a/arch/mn10300/Kconfig
+++ b/arch/mn10300/Kconfig

@@ -13,6 +13,7 @@ config MN10300
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
 	select HAVE_DEBUG_STACKOVERFLOW
+	select CPU_LITTLE_ENDIAN
 
 config AM33_2
 	def_bool n

diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 88e8336..4757b7d 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig

@@ -23,6 +23,7 @@ config OPENRISC
 	select MODULES_USE_ELF_RELA
 	select HAVE_DEBUG_STACKOVERFLOW
 	select OR1K_PIC
+	select CPU_BIG_ENDIAN
 
 config MMU
 	def_bool y

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 6e75e20..dc82137 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig

@@ -29,6 +29,7 @@ config PARISC
 	select TTY # Needed for pdc_cons.c
 	select HAVE_DEBUG_STACKOVERFLOW
 	select HAVE_ARCH_AUDITSYSCALL
+	select CPU_BIG_ENDIAN
 
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 4bc7b62..644c6d4 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig

@@ -147,6 +147,7 @@ config PPC
 	select ARCH_USE_CMPXCHG_LOCKREF if PPC64
 	select HAVE_ARCH_AUDITSYSCALL
 	select ARCH_SUPPORTS_ATOMIC_RMW
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 
 config GENERIC_CSUM
 	def_bool CPU_LITTLE_ENDIAN

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 05c78bb..8691c6f 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig

@@ -62,6 +62,7 @@ config S390
 	def_bool y
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
+	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select ARCH_INLINE_READ_LOCK
 	select ARCH_INLINE_READ_LOCK_BH

@@ -97,6 +98,7 @@ config S390
 	select ARCH_WANT_IPC_PARSE_VERSION
 	select BUILDTIME_EXTABLE_SORT
 	select CLONE_BACKWARDS2
+	select CPU_BIG_ENDIAN
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CPU_DEVICES if !SMP
 	select GENERIC_FIND_FIRST_BIT

@@ -145,7 +147,6 @@ config S390
 	select TTY
 	select VIRT_CPU_ACCOUNTING
 	select VIRT_TO_BUS
-	select ARCH_HAS_SG_CHAIN
 
 config SCHED_OMIT_FRAME_POINTER
 	def_bool y

diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 4ac8cae..713b290 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig

@@ -1,19 +1,20 @@
 menu "Machine selection"
 
 config SCORE
-       def_bool y
-       select GENERIC_IRQ_SHOW
-       select GENERIC_IOMAP
-       select GENERIC_ATOMIC64
-       select HAVE_MEMBLOCK
-       select HAVE_MEMBLOCK_NODE_MAP
-       select ARCH_DISCARD_MEMBLOCK
-       select GENERIC_CPU_DEVICES
-       select GENERIC_CLOCKEVENTS
-       select HAVE_MOD_ARCH_SPECIFIC
+	def_bool y
+	select GENERIC_IRQ_SHOW
+	select GENERIC_IOMAP
+	select GENERIC_ATOMIC64
+	select HAVE_MEMBLOCK
+	select HAVE_MEMBLOCK_NODE_MAP
+	select ARCH_DISCARD_MEMBLOCK
+	select GENERIC_CPU_DEVICES
+	select GENERIC_CLOCKEVENTS
+	select HAVE_MOD_ARCH_SPECIFIC
 	select VIRT_TO_BUS
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
+	select CPU_LITTLE_ENDIAN
 
 choice
 	prompt "System type"

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index a537816..9de09e6 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig

@@ -43,6 +43,7 @@ config SPARC
 	select ODD_RT_SIGACTION
 	select OLD_SIGSUSPEND
 	select ARCH_HAS_SG_CHAIN
+	select CPU_BIG_ENDIAN
 
 config SPARC32
 	def_bool !64BIT

diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 7fcd492..e042479 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig

@@ -27,6 +27,8 @@ config TILE
 	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 	select HAVE_DEBUG_STACKOVERFLOW
 	select ARCH_WANT_FRAME_POINTERS
+	select CPU_BIG_ENDIAN if __BUILDING_TIME_BIG_ENDIAN__
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 
 # FIXME: investigate whether we need/want these options.
 #	select HAVE_IOREMAP_PROT

diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
index 6915d28..f696ec2 100644
--- a/arch/um/Kconfig.common
+++ b/arch/um/Kconfig.common

@@ -8,6 +8,8 @@ config UML
 	select GENERIC_IO
 	select GENERIC_CLOCKEVENTS
 	select TTY # Needed for line.c
+	select CPU_BIG_ENDIAN if __BUILDING_TIME_BIG_ENDIAN__
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 
 config MMU
 	bool

diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 928237a..02be244 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig

@@ -18,6 +18,7 @@ config UNICORE32
 	select ARCH_WANT_FRAME_POINTERS
 	select GENERIC_IOMAP
 	select MODULES_USE_ELF_REL
+	select CPU_LITTLE_ENDIAN
 	help
 	  UniCore-32 is 32-bit Instruction Set Architecture,
 	  including a series of low-power-consumption RISC chip

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 1164b7d..9b83e33 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig

@@ -136,6 +136,7 @@ config X86
 	select HAVE_ACPI_APEI if ACPI
 	select HAVE_ACPI_APEI_NMI if ACPI
 	select ACPI_LEGACY_TABLES_LOOKUP if ACPI
+	select CPU_LITTLE_ENDIAN
 
 config INSTRUCTION_DECODER
 	def_bool y

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 3a617af..a3e8f7e 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig

@@ -22,6 +22,8 @@ config XTENSA
 	select HAVE_IRQ_TIME_ACCOUNTING
 	select HAVE_PERF_EVENTS
 	select COMMON_CLK
+	select CPU_BIG_ENDIAN if __BUILDING_TIME_BIG_ENDIAN__
+	select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
 	help
 	  Xtensa processors are 32-bit RISC machines designed by Tensilica
 	  primarily for embedded systems.  These processors are both

diff --git a/init/Kconfig b/init/Kconfig
index 9565224..6dd3b20 100644
--- a/init/Kconfig
+++ b/init/Kconfig

@@ -23,6 +23,12 @@ config CONSTRUCTORS
 config IRQ_WORK
 	bool
 
+config CPU_LITTLE_ENDIAN
+	bool
+
+config CPU_BIG_ENDIAN
+	bool
+
 config BUILDTIME_EXTABLE_SORT
 	bool

-- 
1.7.11.7

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