| Message ID | 53ECE9DD.80004@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On Fri, Aug 15, 2014 at 12:54:53AM +0800, Chen Gang wrote: > 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 Nak for MIPS. On MIPS Kconfig already always sets one of CPU_BIG_ENDIAN and CPU_LITTLE_ENDIAN depending on platforms and where both endianess are supported by a platform, user choice: config FOO bool "foo" select SYS_SUPPORTS_LITTLE_ENDIAN config FOO bool "foo" select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN [...] choice prompt "Endianess selection" help Some MIPS machines can be configured for either little or big endian byte order. These modes require different kernels and a different Linux distribution. In general there is one preferred byteorder for a particular system but some systems are just as commonly used in the one or the other endianness. config CPU_BIG_ENDIAN bool "Big endian" depends on SYS_SUPPORTS_BIG_ENDIAN config CPU_LITTLE_ENDIAN bool "Little endian" depends on SYS_SUPPORTS_LITTLE_ENDIAN help endchoice So I think you can just drop the MIPS segment from your patch. Ralf
On Thursday 14 August 2014 09:55 AM, Chen Gang wrote: > 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 <gang.chen.5i5j@gmail.com> > --- > 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 It is not clear what exactly are you trying to fix. What doesn't work w/o this patch ! -Vineet
I don't think it's necessary, what's the benfit? 2014-08-15 2:21 GMT+08:00 Vineet Gupta <Vineet.Gupta1@synopsys.com>: > On Thursday 14 August 2014 09:55 AM, Chen Gang wrote: > > 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 <gang.chen.5i5j@gmail.com> > > --- > > 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 > > It is not clear what exactly are you trying to fix. What doesn't work w/o > this > patch ! > > -Vineet >
On 08/15/2014 02:04 AM, Ralf Baechle wrote: > On Fri, Aug 15, 2014 at 12:54:53AM +0800, Chen Gang wrote: > >> 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 > > Nak for MIPS. On MIPS Kconfig already always sets one of CPU_BIG_ENDIAN > and CPU_LITTLE_ENDIAN depending on platforms and where both endianess are > supported by a platform, user choice: > > config FOO > bool "foo" > select SYS_SUPPORTS_LITTLE_ENDIAN > > config FOO > bool "foo" > select SYS_SUPPORTS_BIG_ENDIAN > select SYS_SUPPORTS_LITTLE_ENDIAN > [...] > choice > prompt "Endianess selection" > help > Some MIPS machines can be configured for either little or big endian > byte order. These modes require different kernels and a different > Linux distribution. In general there is one preferred byteorder for a > particular system but some systems are just as commonly used in the > one or the other endianness. > > config CPU_BIG_ENDIAN > bool "Big endian" > depends on SYS_SUPPORTS_BIG_ENDIAN > > config CPU_LITTLE_ENDIAN > bool "Little endian" > depends on SYS_SUPPORTS_LITTLE_ENDIAN > help > > endchoice > OK, thanks, I assumes when support both endian, the default choice is CPU_BIG_ENDIAN, although no default value for choice (originally, I did worry about it). > So I think you can just drop the MIPS segment from your patch. > If what I assumes is correct, what you said sounds reasonable to me. Thanks.
On 08/15/2014 02:27 AM, Lennox Wu wrote: > I don't think it's necessary, what's the benfit? > > 2014-08-15 2:21 GMT+08:00 Vineet Gupta <Vineet.Gupta1@synopsys.com>: > >> On Thursday 14 August 2014 09:55 AM, Chen Gang wrote: [...] >>> 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 >> >> It is not clear what exactly are you trying to fix. What doesn't work w/o >> this >> patch ! >> For many individual modules may need check CPU_LITTLE_ENDIAN or CPU_BIG_ENDIAN, which is an architecture's attribute. Or they have to list many architectures which they support, which they don't support. And still, it is not precise. For architecture API, endian is a main architecture's attribute which may be used by outside, so every architecture need let outside know about it, explicitly. Thanks.
On Thursday 14 August 2014 03:22 PM, Chen Gang wrote: > For many individual modules may need check CPU_LITTLE_ENDIAN or > CPU_BIG_ENDIAN, which is an architecture's attribute. > > Or they have to list many architectures which they support, which they > don't support. And still, it is not precise. > > For architecture API, endian is a main architecture's attribute which > may be used by outside, so every architecture need let outside know > about it, explicitly. I don't think that is correct. The modules need to use standard API e.g. swab which will take care of proper endian handling anyways. Why would a module do anything endian specific outside of those APIs. And again is this churn just theoretical or do you really have a issue at hand ! I would not accept a change for ARC unless you prove that something is broken (or atleast potentially broken) ! -Vineet
Hi Chen, On Thu, Aug 14, 2014 at 8:54 PM, Chen Gang <gang.chen.5i5j@gmail.com> wrote: > 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. [...] > 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 I've tested this part and it doesn't select neither CPU_BIG_ENDIAN, nor CPU_LITTLE_ENDIAN. And looking into the Kconfig/Kbuild I cound't find anything related to __BUILDING_TIME_BIG_ENDIAN__. Am I missing something?
On Fri, Aug 15, 2014 at 5:47 AM, Max Filippov <jcmvbkbc@gmail.com> wrote: > Hi Chen, > > On Thu, Aug 14, 2014 at 8:54 PM, Chen Gang <gang.chen.5i5j@gmail.com> wrote: >> 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. > > [...] > >> 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 > > I've tested this part and it doesn't select neither CPU_BIG_ENDIAN, > nor CPU_LITTLE_ENDIAN. And looking into the Kconfig/Kbuild I cound't Correction: it always selects CPU_LITTLE_ENDIAN, regardless of the compiler endianness. > find anything related to __BUILDING_TIME_BIG_ENDIAN__. Am I missing > something?
On 8/15/14 9:52, Max Filippov wrote: > On Fri, Aug 15, 2014 at 5:47 AM, Max Filippov <jcmvbkbc@gmail.com> wrote: >> Hi Chen, >> >> On Thu, Aug 14, 2014 at 8:54 PM, Chen Gang <gang.chen.5i5j@gmail.com> wrote: >>> 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. Please check this comments, thanks. >> >> [...] >> >>> 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 >> >> I've tested this part and it doesn't select neither CPU_BIG_ENDIAN, >> nor CPU_LITTLE_ENDIAN. And looking into the Kconfig/Kbuild I cound't > > Correction: it always selects CPU_LITTLE_ENDIAN, regardless of the > compiler endianness. > Yeah, at present, it always select CPU_LITTLE_ENDIAN, next, Kbuild need be improved for it, just the comments said. If this patch can be pass checking, I shall improve the Kbuild for it, also will modify some individual drivers to use CPU_*_ENDIAN. I guess, we need Cc to kbuild for getting more ideas, suggestions, or completions. THanks.
On 8/15/14 6:14, Chen Gang wrote: > On 08/15/2014 02:04 AM, Ralf Baechle wrote: >> > > OK, thanks, I assumes when support both endian, the default choice is > CPU_BIG_ENDIAN, although no default value for choice (originally, I did > worry about it). > >> So I think you can just drop the MIPS segment from your patch. >> > > If what I assumes is correct, what you said sounds reasonable to me. > > So for me, it is harmless to add CPU_*_ENDIAN explicitly, and can let other members don't need think of. By the way, for sh, it is almost the same case, except it contents the default value, for me, it is clear enough, so I skip sh architecture in this patch. Thanks
Hello Maintainers: Is this patch OK? If it pass basic checking, please let me know, and I shall try to make another related patch for KBuild (I can do nothing related with Kbuild, before get confirmation for this patch). Thanks. On 8/15/14 17:01, Chen Gang wrote: > > > On 8/15/14 6:14, Chen Gang wrote: >> On 08/15/2014 02:04 AM, Ralf Baechle wrote: >>> >> >> OK, thanks, I assumes when support both endian, the default choice is >> CPU_BIG_ENDIAN, although no default value for choice (originally, I did >> worry about it). >> >>> So I think you can just drop the MIPS segment from your patch. >>> >> >> If what I assumes is correct, what you said sounds reasonable to me. >> >> > > So for me, it is harmless to add CPU_*_ENDIAN explicitly, and can let > other members don't need think of. > > By the way, for sh, it is almost the same case, except it contents the > default value, for me, it is clear enough, so I skip sh architecture in > this patch. > > > Thanks >
Hello all: It seems no any additional rejections for it. I guess, I need split the 'big' patch into pieces, and each send to its' related mailing list, so let it not like a spam. And the schedule may like: - Firstly, send patch for "init/Kconfig" to add CPU_*_ENDIAN. If pass checking (hope it can be passed checking), then - Send each related patch to each related architectures which already knew their ENDIAN attributes in config time (24 patches, I guess), then - Make patch for Kbuild to support __BUILDING_TIME_BIG_ENDIAN__, and pass checking (hope I can finish), then - Finish left architectures which need __BUILDING_TIME_BIG_ENDIAN__ (4 patches, I guess). Welcome any ideas, suggestions, or completions. And if no additional reply, I shall not send any additional information any more to avoid spam to other members. Thanks. On 08/24/2014 04:38 PM, Chen Gang wrote: > Hello Maintainers: > > Is this patch OK? If it pass basic checking, please let me know, and I > shall try to make another related patch for KBuild (I can do nothing > related with Kbuild, before get confirmation for this patch). > > Thanks. > > On 8/15/14 17:01, Chen Gang wrote: >> >> >> On 8/15/14 6:14, Chen Gang wrote: >>> On 08/15/2014 02:04 AM, Ralf Baechle wrote: >>>> >>> >>> OK, thanks, I assumes when support both endian, the default choice is >>> CPU_BIG_ENDIAN, although no default value for choice (originally, I did >>> worry about it). >>> >>>> So I think you can just drop the MIPS segment from your patch. >>>> >>> >>> If what I assumes is correct, what you said sounds reasonable to me. >>> >>> >> >> So for me, it is harmless to add CPU_*_ENDIAN explicitly, and can let >> other members don't need think of. >> >> By the way, for sh, it is almost the same case, except it contents the >> default value, for me, it is clear enough, so I skip sh architecture in >> this patch. >> >> >> Thanks >> >
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
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 <gang.chen.5i5j@gmail.com> --- 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(-)