We need to explicitly only giveup VSX in KVM, so let's export that
specific function to module space.
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Since they are static inline functions.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

Defining CONFIG_SPARSE_IRQ enables generic code that gets rid of the
static irq_desc array, and replaces it with an array of pointers to
irq_descs.

It also allows node local allocation of irq_descs, however we
currently don't have the information available to do that, so we just
allocate them on all on node 0.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

The Freescale PowerPC specific gianfar driver (gig-e) uses
cacheable_memzero for performance reasons we need to export
the symbol to allow the driver to be built as a module.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>

This commit moves the whole no-hash TLB handling out of line into a
new tlb_nohash.c file, and implements some basic SMP support using
IPIs and/or broadcast tlbivax instructions.

Note that I'm using local invalidations for D->I cache coherency.

At worst, if another processor is trying to execute the same and
has the old entry in its TLB, it will just take a fault and re-do
the TLB flush locally (it won't re-do the cache flush in any case).
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This splits the mmu_context handling between 32-bit hash based
processors, 64-bit hash based processors and everybody else.  This is
preliminary work for adding SMP support for BookE processors.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

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: NSteven Rostedt <srostedt@redhat.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Introduced a new set of low level tlb invalidate functions that do not
broadcast invalidates on the bus:

_tlbil_all - invalidate all
_tlbil_pid - invalidate based on process id (or mm context)
_tlbil_va  - invalidate based on virtual address (ea + pid)

On non-SMP configs _tlbil_all should be functionally equivalent to _tlbia and
_tlbil_va should be functionally equivalent to _tlbie.

The intent of this change is to handle SMP based invalidates via IPIs instead
of broadcasts as the mechanism scales better for larger number of cores.

On e500 (fsl-booke mmu) based cores move to using MMUCSR for invalidate alls
and tlbsx/tlbwe for invalidate virtual address.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

This patch extends the floating point save and restore code to use the
VSX load/stores when VSX is available.  This will make FP context
save/restore marginally slower on FP only code, when VSX is available,
as it has to load/store 128bits rather than just 64bits.

Mixing FP, VMX and VSX code will get constant architected state.

The signals interface is extended to enable access to VSR 0-31
doubleword 1 after discussions with tool chain maintainers.  Backward
compatibility is maintained.

The ptrace interface is also extended to allow access to VSR 0-31 full
registers.
Signed-off-by: NMichael Neuling <mikey@neuling.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

There are no in-tree uses of the export any more and in linux-next there
is a change that exports it globally which causes warnings:

WARNING: vmlinux: 'console_drivers' exported twice. Previous export was in vmlinux

and in one case (mpc85xx_defconfig) a build error:

kernel/built-in.o: In function `__crc_console_drivers':
(*ABS*+0x1eb0e6f5): multiple definition of `__crc_console_drivers'

So remove the export now.  Also, there is no longer any need to include
linux/console.h.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This patch cleans up the ftrace code in PowerPC based on the comments from
Michael Ellerman.
Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: proski@gnu.org
Cc: a.p.zijlstra@chello.nl
Cc: Pekka Paalanen <pq@iki.fi>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: linuxppc-dev@ozlabs.org
Cc: Soeren Sandmann Pedersen <sandmann@redhat.com>
Cc: paulus@samba.org
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

This adds a minimalistic braille screen reader support.  This is meant to
be used by blind people e.g.  on boot failures or when / cannot be mounted
etc and thus the userland screen readers can not work.

[akpm@linux-foundation.org: fix exports]
Signed-off-by: NSamuel Thibault <samuel.thibault@ens-lyon.org>
Cc: Jiri Kosina <jikos@jikos.cz>
Cc: Dmitry Torokhov <dtor@mail.ru>
Acked-by: NAlan Cox <alan@redhat.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This adds the low level irq tracing hooks to the powerpc architecture
needed to enable full lockdep functionality.

This is partly based on Johannes Berg's initial version.  I removed
the asm trampoline that isn't needed (thus improving performance) and
modified all sorts of bits and pieces, reworking most of the assembly,
etc...
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Semaphores are no longer performance-critical, so a generic C
implementation is better for maintainability, debuggability and
extensibility.  Thanks to Peter Zijlstra for fixing the lockdep
warning.  Thanks to Harvey Harrison for pointing out that the
unlikely() was unnecessary.
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
Acked-by: NIngo Molnar <mingo@elte.hu>

We have an assembly version of strncmp for the bootwrapper, but not
for the kernel, so we end up using the C version in the kernel.  This
takes the strncmp code from the bootup and copies it to the kernel
proper, adding two instructions so it copes correctly with len==0.
Signed-off-by: NSteven Rostedt <srostedt@redhat.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

It was being protected by CONFIG_PPC32, but we want to export it on
64-bit also.  This moves it out of the ifdef.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Once again, this time with feeling....

						- Ted

>From c91cfaabc17f8a53807a2f31f067a732e34a1550 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Wed, 12 Mar 2008 11:50:39 -0400
Subject: Export empty_zero_page

The empty_zero_page symbol is exported by most other architectures
(s390, ia64, x86, um), and an upcoming ext4 patch needs it because
ZERO_PAGE() references empty_zero_page, and we need it to zero out an
unitialized extents in ext4 files.
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Some drivers (such as V4L2) have code that causes gcc to generate
calls to __ucmpdi2 when compiling for 32-bit powerpc, which results
in either a link-time error or a module that can't be loaded, as
we don't currently have a __ucmpdi2.  This adds one so these drivers
can be used.
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Export copy_page() on 32-bit powerpc; unionfs needs it.

Unionfs already builds as a module on 64bit powerpc, so the export is
placed within an existing CONFIG_PPC32 #ifdef.
Signed-off-by: NJoseph Fannin <jfannin@gmail.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Remove exports of __res and cpm_install_handler/cpm_free_handler.  Remove
cpm_install_handler/cpm_free_handler from the commproc.h as well.  Both
were used for ARCH=ppc and aren't defined for ARCH=powerpc.

CC      arch/powerpc/kernel/ppc_ksyms.o
arch/powerpc/kernel/ppc_ksyms.c:180: error: '__res' undeclared here (not in a function)
arch/powerpc/kernel/ppc_ksyms.c:180: warning: type defaults to 'int' in declaration of '__res'
make[1]: *** [arch/powerpc/kernel/ppc_ksyms.o] Error 1
make: *** [arch/powerpc/kernel] Error 2

LD      .tmp_vmlinux1
arch/powerpc/kernel/built-in.o:(__ksymtab+0x198): undefined reference to `cpm_free_handler'
arch/powerpc/kernel/built-in.o:(__ksymtab+0x1a0): undefined reference to `cpm_install_handler'
make: *** [.tmp_vmlinux1] Error 1
Signed-off-by: NJochen Friedrich <jochen@scram.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NVitaly Bordug <vitb@kernel.crashing.org>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

These are the symptom error messages:

  CC      arch/powerpc/kernel/setup_32.o
In file included from include/linux/blkdev.h:17,
                 from include/linux/ide.h:13,
                 from arch/powerpc/kernel/setup_32.c:13:
include/linux/bsg.h:67: warning: 'struct request_queue' declared inside parameter list
include/linux/bsg.h:67: warning: its scope is only this definition or declaration, which is probably not what you want
include/linux/bsg.h:71: warning: 'struct request_queue' declared inside parameter list
In file included from arch/powerpc/kernel/setup_32.c:13:
include/linux/ide.h:857: error: field 'wrq' has incomplete type

  CC      arch/powerpc/kernel/ppc_ksyms.o
In file included from include/linux/blkdev.h:17,
                 from include/linux/ide.h:13,
                 from arch/powerpc/kernel/ppc_ksyms.c:15:
include/linux/bsg.h:67: warning: 'struct request_queue' declared inside parameter list
include/linux/bsg.h:67: warning: its scope is only this definition or declaration, which is probably not what you want
include/linux/bsg.h:71: warning: 'struct request_queue' declared inside parameter list
In file included from arch/powerpc/kernel/ppc_ksyms.c:15:
include/linux/ide.h:857: error: field 'wrq' has incomplete type

The fix tries to use the smallest scope CONFIG_* symbols that will fix
the build problem.  In this case <linux/ide.h> needs to be included
only if IDE=y or IDE=m were selected.  Also, ppc_ide_md is needed only
if BLK_DEV_IDE=y or BLK_DEV_IDE=m

Moved the EXPORT_SYMBOL(ppc_ide_md) from ppc_ksysms.c next to its
declaration in setup_32.c which made <linux/ide.h> not needed. With
<linux/ide.h> gone from ppc_ksyms.c, <asm/cacheflush.h> is needed to
address the following warnings and errors:

  CC      arch/powerpc/kernel/ppc_ksyms.o
arch/powerpc/kernel/ppc_ksyms.c:122: error: '__flush_icache_range' undeclared here (not in a function)
arch/powerpc/kernel/ppc_ksyms.c:122: warning: type defaults to 'int' in declaration of '__flush_icache_range'
arch/powerpc/kernel/ppc_ksyms.c:123: error: 'flush_dcache_range' undeclared here (not in a function)
arch/powerpc/kernel/ppc_ksyms.c:123: warning: type defaults to 'int' in declaration of 'flush_dcache_range'
Signed-off-by: NEmil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Remove inclusion of __res on 40x.  We don't need it in arch/powerpc
Signed-off-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>

do_signal is never used in modular code (obviously), and no other
architecture exports it either.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

In the places we can move to using pci_bus_to_host, this allows us
to make pci_bus_to_host static and remove its export.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

There are no in kernel users of any off these functions and some of
them were not even EXPORT_SYMBOL:

- pci_bus_io_base()
- pci_bus_io_base_phys()
- pci_bus_mem_base_phys()
- pci_resource_to_bus()
- phys_to_bus()
- pci_phys_to_bus()
- pci_bus_to_phys()
- pci_init_resource()
- resource_fixup()
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

Change 3927f2e8 moved lib/lib64.c from
lib-y to obj-y, preventing the export in ppc_ksyms.c from overriding
the one in lib, and thus causing a duplicate-export warning.
Signed-off-by: NScott Wood <scottwood@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

We have several platforms using local copies of identical
code.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove unneeded inclusion of linux/ide.h
It does not compile with CONFIG_BLOCK=n.

Remove asm/ide.h from ksyms file, it gets included earlier via
linux/ide.h.

Compile tested with all defconfig files.
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The new dcr code does not currently compile when configured for native
DCR access on ARCH=powerpc.  This patch fixes the problems.
Signed-off-by: NDavid Gibson <dwg@au1.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

On 85xx we don't build in dcr support because the core doesn't implement the
instructions.  This caused problems when building an 85xx kernel.  Additionally
made it so we only build __mtdcr/__mfdcr if we are CONFIG_PPC_DCR_NATIVE.

The 85xx build issue wasPointed out by Dai Haruki.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

This implements a lazy strategy for disabling interrupts.  This means
that local_irq_disable() et al. just clear the 'interrupts are
enabled' flag in the paca.  If an interrupt comes along, the interrupt
entry code notices that interrupts are supposed to be disabled, and
clears the EE bit in SRR1, clears the 'interrupts are hard-enabled'
flag in the paca, and returns.  This means that interrupts only
actually get disabled in the processor when an interrupt comes along.

When interrupts are enabled by local_irq_enable() et al., the code
sets the interrupts-enabled flag in the paca, and then checks whether
interrupts got hard-disabled.  If so, it also sets the EE bit in the
MSR to hard-enable the interrupts.

This has the potential to improve performance, and also makes it
easier to make a kernel that can boot on iSeries and on other 64-bit
machines, since this lazy-disable strategy is very similar to the
soft-disable strategy that iSeries already uses.

This version renames paca->proc_enabled to paca->soft_enabled, and
changes a couple of soft-disables in the kexec code to hard-disables,
which should fix the crash that Michael Ellerman saw.  This doesn't
yet use a reserved CR field for the soft_enabled and hard_enabled
flags.  This applies on top of Stephen Rothwell's patches to make it
possible to build a combined iSeries/other kernel.
Signed-off-by: NPaul Mackerras <paulus@samba.org>

This produces essentially the same code and will make the iSeries i/o
consolidation easier.

The count parameter is changed to long since that will produce the same
(better) code on 32 and 64 bit builds.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>

_insw, _outsw, _insl amd _outsl are all unused, so remove them.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>

Export copy_4K_page() for use by modules via copy_page() (such as
CacheFiles).
Signed-Off-By: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Removes the flush_dcache_all export for non coherent platforms.
We removed the last in-kernel user of this years ago in arch/ppc
so it no longer serves a purpose. Plus, it breaks the build
at the moment.
Signed-off-by: NMatt Porter <mporter@embeddedalley.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Removes the flush_dcache_all export for non coherent platforms.
We removed the last in-kernel user of this years ago in arch/ppc
so it no longer serves a purpose. Plus, it breaks the build
at the moment.
Signed-off-by: NMatt Porter <mporter@embeddedalley.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

screen_info.h doesn't have anything to do with the tty layer and shouldn't be
included by tty.h.  This patches removes the include and modifies all users to
directly include screen_info.h.  struct screen_info is mainly used to
communicate with the console drivers in drivers/video/console.  Note that this
patch touches every arch and I have no way of testing it.  If there is a
mistake the worst thing that will happen is a compile error.

[akpm@osdl.org: fix arm build]
[akpm@osdl.org: fix alpha build]
Signed-off-by: NJon Smirl <jonsmir@gmail.com>
Signed-off-by: NAntonino Daplas <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Signed-off-by: NJörn Engel <joern@wohnheim.fh-wedel.de>
Signed-off-by: NAdrian Bunk <bunk@stusta.de>

We have a strncasecmp so we might as well export it
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>