20 Dec, 2011
1 commit
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The following patch implements the dynamic relocation processing for
PPC32 kernel. relocate() accepts the target virtual address and relocates
the kernel image to the same.Currently the following relocation types are handled :
R_PPC_RELATIVE
R_PPC_ADDR16_LO
R_PPC_ADDR16_HI
R_PPC_ADDR16_HAThe last 3 relocations in the above list depends on value of Symbol indexed
whose index is encoded in the Relocation entry. Hence we need the Symbol
Table for processing such relocations.Note: The GNU ld for ppc32 produces buggy relocations for relocation types
that depend on symbols. The value of the symbols with STB_LOCAL scope
should be assumed to be zero. - Alan ModraSigned-off-by: Suzuki K. Poulose
Signed-off-by: Josh Poimboeuf
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Alan Modra
Cc: Kumar Gala
Cc: linuxppc-dev
Signed-off-by: Josh Boyer
08 Dec, 2011
1 commit
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So I've had one of these for a while and it looks like the vendor never
bothered submitting the support upstream.This adds it using ppc40x_simple and provides a device-tree.
There are some changes to the boot wrapper because the way u-boot works
on this thing, it seems to expect a multipart image with the kernel,
initrd and dtb in it.The USB support is missing as it needs the yet unmerged driver for
the DWC OTG part and the GPIOs may need further definition in the dts.Signed-off-by: Benjamin Herrenschmidt
28 Nov, 2011
1 commit
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In lieu of having multiple similiar lines, we can just have one
generic cpu-as line for CONFIG_ALTIVECSigned-off-by: Benjamin Herrenschmidt
17 Nov, 2011
1 commit
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Recent binutils refuses to assemble AltiVec opcodes when in e500/SPE
mode, as some of those opcodes alias the "SPE" instructions. This
triggers an ancient binutils version check even when building a kernel
with CONFIG_ALTIVEC disabled.In theory, the check could be conditionalized on CONFIG_ALTIVEC, but in
practice it has long outlived its utility. It is virtually impossible
to find binutils older than 2.12.1 (released 2002) in the wild anymore.
Even ancient RedHat Enterprise Linux 4 has binutils-2.14.To fix the kernel build when done natively on e500 systems with this new
binutils, the test is simply removed.Signed-off-by: Kyle Moffett
Signed-off-by: Benjamin Herrenschmidt
26 Jul, 2011
1 commit
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* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (99 commits)
drivers/virt: add missing linux/interrupt.h to fsl_hypervisor.c
powerpc/85xx: fix mpic configuration in CAMP mode
powerpc: Copy back TIF flags on return from softirq stack
powerpc/64: Make server perfmon only built on ppc64 server devices
powerpc/pseries: Fix hvc_vio.c build due to recent changes
powerpc: Exporting boot_cpuid_phys
powerpc: Add CFAR to oops output
hvc_console: Add kdb support
powerpc/pseries: Fix hvterm_raw_get_chars to accept < 16 chars, fixing xmon
powerpc/irq: Quieten irq mapping printks
powerpc: Enable lockup and hung task detectors in pseries and ppc64 defeconfigs
powerpc: Add mpt2sas driver to pseries and ppc64 defconfig
powerpc: Disable IRQs off tracer in ppc64 defconfig
powerpc: Sync pseries and ppc64 defconfigs
powerpc/pseries/hvconsole: Fix dropped console output
hvc_console: Improve tty/console put_chars handling
powerpc/kdump: Fix timeout in crash_kexec_wait_realmode
powerpc/mm: Fix output of total_ram.
powerpc/cpufreq: Add cpufreq driver for Momentum Maple boards
powerpc: Correct annotations of pmu registration functions
...Fix up trivial Kconfig/Makefile conflicts in arch/powerpc, drivers, and
drivers/cpufreq
22 Jul, 2011
1 commit
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An implementation of a code generator for BPF programs to speed up packet
filtering on PPC64, inspired by Eric Dumazet's x86-64 version.Filter code is generated as an ABI-compliant function in module_alloc()'d mem
with stackframe & prologue/epilogue generated if required (simple filters don't
need anything more than an li/blr). The filter's local variables, M[], live in
registers. Supports all BPF opcodes, although "complicated" loads from negative
packet offsets (e.g. SKF_LL_OFF) are not yet supported.There are a couple of further optimisations left for future work; many-pass
assembly with branch-reach reduction and a register allocator to push M[]
variables into volatile registers would improve the code quality further.This currently supports big-endian 64-bit PowerPC only (but is fairly simple
to port to PPC32 or LE!).Enabled in the same way as x86-64:
echo 1 > /proc/sys/net/core/bpf_jit_enable
Or, enabled with extra debug output:
echo 2 > /proc/sys/net/core/bpf_jit_enable
Signed-off-by: Matt Evans
Acked-by: Eric Dumazet
Signed-off-by: David S. Miller
01 Jul, 2011
1 commit
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gcc 4.7 will be more strict about parsing the -mtraceback option:
gcc: error: unrecognized argument in option '-mtraceback=none'
gcc: note: valid arguments to '-mtraceback=' are: full no partgcc used to do a 2 char compare so both "no" and "none" would
match. Switch to using -mtraceback=no should work everywhere.Signed-off-by: Anton Blanchard
Signed-off-by: Benjamin Herrenschmidt
24 Aug, 2010
1 commit
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Commit e32e78c5ee8aadef020fbaecbe6fb741ed9029fd
(powerpc: fix build with make 3.82) introduced a
typo in uImage target and broke building uImage:make: *** No rule to make target `uImage'. Stop.
Signed-off-by: Anatolij Gustschin
Cc: stable
Signed-off-by: Benjamin Herrenschmidt
09 Aug, 2010
1 commit
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Thomas Backlund reported that the powerpc build broke with make 3.82.
It failed with the following message:arch/powerpc/Makefile:183: *** mixed implicit and normal rules. Stop.
The fix is to avoid mixing non-wildcard and wildcard targets.
Reported-by: Thomas Backlund
Tested-by: Thomas Backlund
Cc: Michal Marek
Cc: stable
Signed-off-by: Sam Ravnborg
Signed-off-by: Benjamin Herrenschmidt
04 Aug, 2010
1 commit
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Conflicts:
arch/powerpc/Makefile
03 Aug, 2010
1 commit
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It is now possible to assign options to AS, CC and LD
on the command line - which is only used when building modules.{A,C,LD}FLAGS_MODULE was all used both in the top-level Makefile
in the arch makefiles, thus users had no way to specify
additional options to AS, CC, LD when building modules
without overriding the original value.Introduce a new set of variables KBUILD_{A,C,LD}FLAGS_MODULE
that is used by arch specific files and free up
{A,C,LD}FLAGS_MODULE so they can be assigned on
the command line.All arch Makefiles that used the old variables has been updated.
Note: Previously we had a MODFLAGS variable for both
AS and CC. But in favour of consistency this was dropped.
So in some cases arch Makefile has one assignmnet replaced by
two assignmnets.Note2: MODFLAGS was not documented and is dropped
without any notice. I do not expect much/any breakage
from this.Signed-off-by: Sam Ravnborg
Cc: Denys Vlasenko
Cc: Haavard Skinnemoen
Cc: Mike Frysinger
Cc: Tony Luck
Cc: Geert Uytterhoeven
Cc: Ralf Baechle
Cc: Benjamin Herrenschmidt
Cc: Martin Schwidefsky
Cc: Chen Liqin
Acked-by: Mike Frysinger [blackfin]
Acked-by: Haavard Skinnemoen [avr32]
Signed-off-by: Michal Marek
08 Jul, 2010
1 commit
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Gcc 4.5 is now generating out of line register save and restore
in the function prefix and postfix when we use -Os.Signed-off-by: Stephen Rothwell
Signed-off-by: Benjamin Herrenschmidt
06 Feb, 2010
1 commit
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Better dwarf2 unwind information is a good thing, it allows better
debugging with kgdb and crash and helps systemtap.Commit 003086497f07f7f1e67c0c295e261740f822b377 ("Build with
-fno-dwarf2-cfi-asm") disabled some CFI information globally to work
around a module loader bug on powerpc.But this disables the better unwind tables for all architectures, not just
powerpc. Move the workaround to powerpc and also add a suitable comment
that's it really a workaround.This improves dwarf2 unwind tables on x86 at least.
Signed-off-by: Andi Kleen
Cc: Kyle McMartin
Signed-off-by: Andrew Morton
Acked-by: Benjamin Herrenschmidt
Signed-off-by: Michal Marek
24 Sep, 2009
1 commit
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When using CONFIG_RELOCATABLE, we build the kernel as a position
independent executable. The kernel then uses a little bit of relocation
code to relocate itself. That code only deals with R_PPC64_RELATIVE
relocations though. If for some reason you use assembly constructs
such as LOAD_REG_IMMEDIATE() to load the address of a symbol, you'll
generate different kinds of relocations that won't be processed properly
and bad things will happen. (We have 2 such bugs today).The perl script tries to filter out "known" bad ones. It's possible
that we are missing some in the case of a weak function that nobody
implements, we'll see if we get false positive and fix it.Signed-off-by: Tony Breeds
Signed-off-by: Benjamin Herrenschmidt
20 Sep, 2009
2 commits
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Albin Tonnerre reported:
Bash 4 filters out variables which contain a dot in them.
This happends to be the case of CPPFLAGS_vmlinux.lds.
This is rather unfortunate, as it now causes
build failures when using SHELL=/bin/bash to compile,
or when bash happens to be used by make (eg when it's /bin/sh)Remove the common definition of CPPFLAGS_vmlinux.lds by
pushing relevant stuff to either Makefile.build or the
arch specific kernel/Makefile where we build the linker script.This is also nice cleanup as we move the information out where
it is used.Notes for the different architectures touched:
arm - we use an already exported symbol
cris - we use a config symbol aleady available
[Not build tested]
mips - the jiffies complexity has moved to vmlinux.lds.S where we need it.
Added a few variables to CPPFLAGS - they are only used by
the linker script.
[Not build tested]
powerpc - removed assignment that is not needed
[not build tested]
sparc - simplified it using $(BITS)
um - introduced a few new exported variables to deal with this
xtensa - added options to CPP invocation
[not build tested]Cc: Albin Tonnerre
Cc: Russell King
Cc: Mikael Starvik
Cc: Jesper Nilsson
Cc: Benjamin Herrenschmidt
Cc: Paul Mackerras
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Chris Zankel
Signed-off-by: Sam Ravnborg -
Replace the use of CROSS_COMPILE to select a customized
installkernel script with the possibility to set INSTALLKERNEL
to select a custom installkernel script when running make:make INSTALLKERNEL=arm-installkernel install
With this patch we are now more consistent across
different architectures - they did not all support use
of CROSS_COMPILE.The use of CROSS_COMPILE was a hack as this really belongs
to gcc/binutils and the installkernel script does not change
just because we change toolchain.The use of CROSS_COMPILE caused troubles with an upcoming patch
that saves CROSS_COMPILE when a kernel is built - it would no
longer be installable.
[Thanks to Peter Z. for this hint]This patch undos what Ian did in commit:
0f8e2d62fa04441cd12c08ce521e84e5bd3f8a46
("use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh")The patch has been lightly tested on x86 only - but all changes
looks obvious.Acked-by: Peter Zijlstra
Acked-by: Mike Frysinger [blackfin]
Acked-by: Russell King [arm]
Acked-by: Paul Mundt [sh]
Acked-by: "H. Peter Anvin" [x86]
Cc: Ian Campbell
Cc: Tony Luck [ia64]
Cc: Fenghua Yu [ia64]
Cc: Hirokazu Takata [m32r]
Cc: Geert Uytterhoeven [m68k]
Cc: Kyle McMartin [parisc]
Cc: Benjamin Herrenschmidt [powerpc]
Cc: Martin Schwidefsky [s390]
Cc: Thomas Gleixner [x86]
Cc: Ingo Molnar [x86]
Signed-off-by: Sam Ravnborg
20 Aug, 2009
1 commit
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Signed-off-by: Frans Pop
Acked-by: Sam Ravnborg
Signed-off-by: Benjamin Herrenschmidt
09 Jun, 2009
1 commit
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Currently, load_up_altivec and give_up_altivec are duplicated
in 32-bit and 64-bit. This creates a common implementation that
is moved away from head_32.S, head_64.S and misc_64.S and into
vector.S, using the same macros we already use for our common
implementation of load_up_fpu.I also moved the VSX code over to vector.S though in that case
I didn't make it build on 32-bit (yet).Signed-off-by: Benjamin Herrenschmidt
11 Mar, 2009
1 commit
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There is no dependece between efp and math-emu. But when disable math-emu
the efp code cannot be built.Signed-off-by: Liu Yu
Signed-off-by: Kumar Gala
03 Dec, 2008
1 commit
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After testing of various compiler flag combinations by Nate Case it was
determined that -mabi=no-spe has no impact on the compiler generating
SPE instructions. Only -mno-spe and -mspe=no do.Signed-off-by: Kumar Gala
21 Oct, 2008
1 commit
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Due to confusion between the ftrace infrastructure and the gcc profiling
tracer "ftrace", this patch renames the config options from FTRACE to
FUNCTION_TRACER. The other two names that are offspring from FTRACE
DYNAMIC_FTRACE and FTRACE_MCOUNT_RECORD will stay the same.This patch was generated mostly by script, and partially by hand.
Signed-off-by: Steven Rostedt
Signed-off-by: Ingo Molnar
16 Sep, 2008
2 commits
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Those two are required on my fresh gcc 4.3.1.
Signed-off-by: Thiemo Seufer
Signed-off-by: Sebastian Siewior
Signed-off-by: Paul Mackerras -
This implements CONFIG_RELOCATABLE for 64-bit by making the kernel as
a position-independent executable (PIE) when it is set. This involves
processing the dynamic relocations in the image in the early stages of
booting, even if the kernel is being run at the address it is linked at,
since the linker does not necessarily fill in words in the image for
which there are dynamic relocations. (In fact the linker does fill in
such words for 64-bit executables, though not for 32-bit executables,
so in principle we could avoid calling relocate() entirely when we're
running a 64-bit kernel at the linked address.)The dynamic relocations are processed by a new function relocate(addr),
where the addr parameter is the virtual address where the image will be
run. In fact we call it twice; once before calling prom_init, and again
when starting the main kernel. This means that reloc_offset() returns
0 in prom_init (since it has been relocated to the address it is running
at), which necessitated a few adjustments.This also changes __va and __pa to use an equivalent definition that is
simpler. With the relocatable kernel, PAGE_OFFSET and MEMORY_START are
constants (for 64-bit) whereas PHYSICAL_START is a variable (and
KERNELBASE ideally should be too, but isn't yet).With this, relocatable kernels still copy themselves down to physical
address 0 and run there.Signed-off-by: Paul Mackerras
03 Sep, 2008
1 commit
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This bug is causing random crashes
(http://bugzilla.kernel.org/show_bug.cgi?id=11414).-fno-omit-frame-pointer is only needed on powerpc when -pg is also
supplied, and there is a gcc bug that causes incorrect code generation
on 32-bit powerpc when -fno-omit-frame-pointer is used---it uses stack
locations below the stack pointer, which is not allowed by the ABI
because those locations can and sometimes do get corrupted by an
interrupt.This ensures that CONFIG_FRAME_POINTER is only selected by ftrace.
When CONFIG_FTRACE is enabled we also pass -mno-sched-epilog to work
around the gcc codegen bug.Patch based on work by:
Andreas Schwab
Segher BoessenkoolSigned-off-by: Tony Breeds
Signed-off-by: Paul Mackerras
04 Jul, 2008
1 commit
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There have been many questions on and off the mailing list about how
exactly the bootwrapper is used for embedded targets. Add some
documentation and help text to try and clarify the system.Signed-off-by: Grant Likely
30 Jun, 2008
1 commit
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CROSS32AS and CROSS32LD are never used (instead, CROSS32CC is used
with proper command line options).CROSS32OBJCOPY isn't used anymore either, since the "wrapper" stuff
was added.Remove these unused variables.
Signed-off-by: Segher Boessenkool
Signed-off-by: Paul Mackerras
16 Jun, 2008
1 commit
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GCC 4.4.x looks to be adding support for generating out-of-line register
saves/restores based on:http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html
This breaks the kernel if we enable CONFIG_CC_OPTIMIZE_FOR_SIZE. To fix
this we add the use the save/restore code from gcc and simplified it down
for our needs (integer only).Additionally, we have to link this code into each module. The other
solution was to add EXPORT_SYMBOL() which meant going through the
trampoline which seemed nonsensical for these out-of-line routines.Finally, we add some checks to prom_init_check.sh to ignore the
out-of-line save/restore functions.Signed-off-by: Kumar Gala
Signed-off-by: Paul Mackerras
11 Jun, 2008
1 commit
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Without simpleImage% in the BOOT_TARGETS list, it is impossible to
build any of the simpleImages.Signed-off-by: Grant Likely
Signed-off-by: Josh Boyer
27 Apr, 2008
1 commit
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This functionality is definitely experimental, but is capable of running
unmodified PowerPC 440 Linux kernels as guests on a PowerPC 440 host. (Only
tested with 440EP "Bamboo" guests so far, but with appropriate userspace
support other SoC/board combinations should work.)See Documentation/powerpc/kvm_440.txt for technical details.
[stephen: build fix]
Signed-off-by: Hollis Blanchard
Acked-by: Paul Mackerras
Signed-off-by: Stephen Rothwell
Signed-off-by: Avi Kivity
17 Apr, 2008
1 commit
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There does not appear to be any reason that we shouldn't just have
-Iarch/$(ARCH) on both ppc32 and ppc64 builds.Signed-off-by: Kumar Gala
Signed-off-by: Paul Mackerras
03 Apr, 2008
1 commit
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Call dtc from the Makefile instead of the wrapper script so that the dt
blobs can be generated with a simple make invocation.Using this patch allows board ports to trigger automatic building of .dtb
files by adding them to the image-y target list.Signed-off-by: Grant Likely
Signed-off-by: Josh Boyer
13 Mar, 2008
1 commit
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The pattern substitution rules were failing when used with zImage-dtb
targets. If zImage-dtb.initrd was selected, the pattern substitution
would generate "zImage.initrd-dtb" instead of "zImage-dtb.initrd" which
caused the build to fail.This renames zImage-dtb to dtbImage to avoid the problem entirely.
By not using the zImage prefix then is no potential for namespace
collisions.Signed-off-by: Grant Likely
Acked-by: Geoff Levand
Signed-off-by: Paul Mackerras
19 Feb, 2008
1 commit
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I suggest to make the vdso_install step independent as
in following patch.This solves the issue at ahnd and still gives us the posibility
to install the files should they be needed.Signed-off-by: Sam Ravnborg
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
07 Feb, 2008
1 commit
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Currently, the kernel uses CONFIG_DEVICE_TREE to wrap a kernel image
with a fdt blob which means for any given configuration only one dts
file can be selected and so support for only one board can be builtThis moves the selection of the default .dts file out of the kernel
config and into the bootwrapper makefile. The makefile chooses which
images to build based on the kernel config and the dts source file
name is taken directly from the image name. For example "cuImage.ebony"
will use "ebony.dts" as the device tree source file.In addition, this patch allows a specific image to be requested from the
command line by adding "cuImage.%" and "treeImage.%" targets to the list
of valid built targets in arch/powerpc/Makefile. This allows the default
dts selection to be overridden.Another advantage to this change is it allows a single defconfig to be
supplied for all boards using the same chip family and only differing in
the device tree.Important note: This patch adds two new zImage targets; zImage.dtb.% and
zImage.dtb.initrd.% for zImages with embedded dtb files. Currently
there are 5 platforms which require this: ps3, ep405, mpc885ads, ep88xc,
adder875-redboot and ep8248e. This patch *changes the zImage filenames*
for those platforms. ie. 'zImage.ps3' is now 'zImage.dtb.ps3'.This new zImage.dtb targets were added so that the .dts file could be
part of the dependancies list for building them.Signed-off-by: Grant Likely
Signed-off-by: Paul Mackerras
06 Dec, 2007
1 commit
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This adds a 'bootwrapper_install' make target for the powerpc
architecture, which installs the wrapper script, intermediate object
files and device-tree sources for later use.This will then allow bootable zImages to be created other than in the
context of a kernel build.Signed-off-by: David Woodhouse
Signed-off-by: Paul Mackerras
09 Nov, 2007
1 commit
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Newer GCC's are capable of autovectorization for ISA extensions like
AltiVec and SPE. If we happen to build with one of those compilers we
will get SPE instructions in random kernel code. Today we only allow
basic interger code in the kernel and FP, AltiVec, or SPE in special
explicit locations that have handled the proper saving and restoring of
the register state (since on uniprocessor we lazy context switch the
register state for FP, AltiVec, and SPE).-mno-spe disables the compiler for automatically generating SPE
instructions without our knowledge.Signed-off-by: Kumar Gala
16 Oct, 2007
2 commits
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The variable CPPFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.This patch replace use of CPPFLAGS with KBUILD_CPPFLAGS all over the
tree and enabling one to use:
make CPPFLAGS=...
to specify additional CPP commandline options.Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390Signed-off-by: Sam Ravnborg
-
The variable AFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.This patch replace use of AFLAGS with KBUILD_AFLAGS all over
the tree.Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68k, s390Signed-off-by: Sam Ravnborg
15 Oct, 2007
1 commit
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The variable CFLAGS is a wellknown variable and the usage by
kbuild may result in unexpected behaviour.
On top of that several people over time has asked for a way to
pass in additional flags to gcc.This patch replace use of CFLAGS with KBUILD_CFLAGS all over the
tree and enabling one to use:
make CFLAGS=...
to specify additional gcc commandline options.One usecase is when trying to find gcc bugs but other
use cases has been requested too.Patch was tested on following architectures:
alpha, arm, i386, x86_64, mips, sparc, sparc64, ia64, m68kTest was simple to do a defconfig build, apply the patch and check
that nothing got rebuild.Signed-off-by: Sam Ravnborg
03 Oct, 2007
1 commit
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The trick for finding the right defconfig is neat, but you forgot to
provide an i686_defconfig. ;-)More seriously, cross compiling the defconfig is often useful, e.g. for
testing the compilation of patches that touch multiple architectures,
and this patch therefore chooses g5_defconfig if $(CROSS_COMPILE) is
non-empty.Signed-off-by: Adrian Bunk
Acked-by: Sam Ravnborg
Cc: Benjamin Herrenschmidt
Cc: Olof Johansson
Signed-off-by: Andrew Morton
Signed-off-by: Paul Mackerras
