linux.git/arch/powerpc/Kconfig.debug, branch v2.6.29

powerpc: Allow the max stack trace depth to be configured

2008-12-03T09:46:35+00:00

On my screen, when something crashes, I only have space for maybe 16
functions of the stack trace before the information above it scrolls
off the screen.  It's easy to hack the kernel to print out only that
much, but it's harder to remember to do it.  This introduces a config
option for it so that I can keep the setting in my config.

Signed-off-by: Johannes Berg 
Signed-off-by: Paul Mackerras

powerpc: Split-out common MSI bitmap logic into msi_bitmap.c

2008-08-20T06:34:57+00:00

There are now two almost identical implementations of an MSI bitmap
allocator, one in mpic_msi.c and the other in fsl_msi.c.

Merge them together and put the result in msi_bitmap.c.  Some of the
MPIC bits will remain to provide a nicer interface for the MPIC users.

In the process we fix two buglets.  The first is that the allocation
routines, now msi_bitmap_alloc_hwirqs(), returned an unsigned result,
even though they use -1 to indicate allocation failure.  Although all
the callers were checking correctly, it is much better for the routine
to just return an int.  At least until someone wants > ~2 billion MSIs.

The second buglet is that the device tree reservation logic only
allowed power-of-two reservations.  AFAICT that didn't effect any
existing code but it's nicer if we can reserve arbitrary irqs from MSI
use.

We also add some selftests, which exposed the two buglets and now test
for them, as well as some basic sanity tests.  The tests are only built
when CONFIG_DEBUG_KERNEL=y.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

powerpc: Remove use of CONFIG_PPC_MERGE

2008-08-04T03:18:17+00:00

Now that arch/ppc is gone and CONFIG_PPC_MERGE is always set, remove
the dead code associated with !CONFIG_PPC_MERGE from arch/powerpc
and include/asm-powerpc.

Signed-off-by: Kumar Gala 
Signed-off-by: Paul Mackerras

kgdb, powerpc: arch specific powerpc kgdb support

2008-07-23T16:30:15+00:00

This patch removes the old kgdb reminants from ARCH=powerpc and
implements the new style arch specific stub for the common kgdb core
interface.

It is possible to have xmon and kgdb in the same kernel, but you
cannot use both at the same time because there is only one set of
debug hooks.

The arch specific kgdb implementation saves the previous state of the
debug hooks and restores them if you unconfigure the kgdb I/O driver.
Kgdb should have no impact on a kernel that has no kgdb I/O driver
configured.

Signed-off-by: Jason Wessel

powerpc: Add self-tests of the feature fixup code

2008-07-01T01:28:30+00:00

This commit adds tests of the feature fixup code, they are run during
boot if CONFIG_FTR_FIXUP_SELFTEST=y. Some of the tests manually invoke
the patching routines to check their behaviour, and others use the
macros and so are patched during the normal patching done during boot.

Because we have two sets of macros with different names, we use a macro
to generate the test of the macros, very niiiice.

Signed-off-by: Michael Ellerman 
Signed-off-by: Paul Mackerras

powerpc: Add tests of the code patching routines

2008-07-01T01:28:22+00:00

Add tests of the existing code patching routines, as well as the new
routines added in the last commit.  The self-tests are run late in boot
when CONFIG_CODE_PATCHING_SELFTEST=y, which depends on DEBUG_KERNEL=y.

Signed-off-by: Michael Ellerman 
Acked-by: Kumar Gala 
Signed-off-by: Paul Mackerras

[POWERPC] Add IRQSTACKS support on ppc32

2008-04-29T05:57:34+00:00

This makes it possible to use separate stacks for hard and soft IRQs
on 32-bit powerpc as well as on 64-bit.  The code for 32-bit is just
the 32-bit analog of the 64-bit code.

* Added allocation and initialization of the irq stacks.  We limit the
  stacks to be in lowmem for ppc32.
* Implemented ppc32 versions of call_do_softirq() and call_handle_irq()
  to switch the stack pointers
* Reworked how we do stack overflow detection.  We now keep around the
  limit of the stack in the thread_struct and compare against the limit
  to see if we've overflowed.  We can now use this on ppc64 if desired.

[ paulus@samba.org: Fixed bug on 6xx where we need to reload r9 with the
  thread_info pointer. ]

Signed-off-by: Kumar Gala 
Signed-off-by: Paul Mackerras

KVM: ppc: PowerPC 440 KVM implementation

2008-04-27T15:21:39+00:00

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

[POWERPC] cpm-serial: Relocate CPM buffer descriptors and SMC parameter ram.

2008-04-17T06:01:37+00:00

This patch relocates the buffer descriptors and the SMC parameter RAM at the
end of the first CPM muram chunk, as described in the device tree. This allows
device trees to stop excluding SMC parameter ram allocated by the boot loader
from the CPM muram node.

Signed-off-by: Laurent Pinchart 
Acked-by: Scott Wood 
Signed-off-by: Kumar Gala

[POWERPC] 4xx: Base support for 440GX Taishan eval board

2007-12-23T19:13:33+00:00

This patch adds base support for the AMCC Taishan 440GX evaluation
board.

Signed-off-by: Hugh Blemings 
Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Josh Boyer