GitHub/LineageOS/G12/android_kernel_amlogic_linux-4.9.git
16 years agopowerpc: Remove CHRP and PMAC support from FSL defconfigs
Timur Tabi [Fri, 26 Sep 2008 07:19:46 +0000 (07:19 +0000)]
powerpc: Remove CHRP and PMAC support from FSL defconfigs

Fix various defconfigs for Freescale chip based boards to remove
CONFIG_PPC_PMAC or CONFIG_PPC_CHRP which crept in due to those
being default y

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Enforce sane MAX_ORDER
Johannes Berg [Wed, 24 Sep 2008 04:29:08 +0000 (04:29 +0000)]
powerpc: Enforce sane MAX_ORDER

powerpc uses CONFIG_FORCE_MAX_ZONEORDER, and some things depend on it
being at least 10 when 64k pages are not configured (notably the dart
iommu code with CONFIG_PM). The defaults are fine, but when going from a
64K pages config to one without 64K pages, MAX_ORDER stays at 9 which is
too low for 4K pages.

This patch makes the Kconfig enforce at least the defaults.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Fix 64-bit hibernation with 64k pages
Johannes Berg [Wed, 24 Sep 2008 04:01:09 +0000 (04:01 +0000)]
powerpc: Fix 64-bit hibernation with 64k pages

A bug in my initial 64-bit hibernation code breaks it when using
page sizes that aren't 4K.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc/iseries: Remove unused variable in viodasd.c
Johann Felix Soden [Sun, 21 Sep 2008 09:02:36 +0000 (09:02 +0000)]
powerpc/iseries: Remove unused variable in viodasd.c

The variable statindex in send_request is never read, so remove it.

Signed-off-by: Johann Felix Soden <johfel@users.sourceforge.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Remove outdated Documentation/powerpc/smp.txt
Geert Uytterhoeven [Mon, 15 Sep 2008 23:10:54 +0000 (23:10 +0000)]
powerpc: Remove outdated Documentation/powerpc/smp.txt

Documentation/powerpc/smp.txt is so outdated that it makes sense to just
remove it.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Remove remains of /proc/ppc_htab
Geert Uytterhoeven [Mon, 15 Sep 2008 23:09:08 +0000 (23:09 +0000)]
powerpc: Remove remains of /proc/ppc_htab

commit 14cf11af6cf608eb8c23e989ddb17a715ddce109 ("powerpc: Merge enough to
start building in arch/powerpc.") unwired /proc/ppc_htab, and commit
917f0af9e5a9ceecf9e72537fabb501254ba321d ("powerpc: Remove arch/ppc and
include/asm-ppc") removed the rest of the /proc/ppc_htab support, but there are
still a few references left. Kill them for good.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Avoid integer overflow in page_is_ram()
Roland Dreier [Mon, 15 Sep 2008 10:43:35 +0000 (10:43 +0000)]
powerpc: Avoid integer overflow in page_is_ram()

Commit 8b150478 ("ppc: make phys_mem_access_prot() work with pfns
instead of addresses") fixed page_is_ram() in arch/ppc to avoid overflow
for addresses above 4G on 32-bit kernels.  However arch/powerpc's
page_is_ram() is missing the same fix -- it computes a physical address
by doing pfn << PAGE_SHIFT, which overflows if pfn corresponds to a page
above 4G.

In particular this causes pages above 4G to be mapped with the wrong
caching attribute; for example many ppc440-based SoCs have PCI space
above 4G, and mmap()ing MMIO space may end up with a mapping that has
caching enabled.

Fix this by working with the pfn and avoiding the conversion to
physical address that causes the overflow.  This patch compares the
pfn to max_pfn, which is a semantic change from the old code -- that
code compared the physical address to high_memory, which corresponds
to max_low_pfn.  However, I think that was is another bug, since
highmem pages are still RAM.

Reported-by: vb <vb@vsbe.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Ignore generated vmlinux.lds in git
Sebastien Dugue [Sun, 14 Sep 2008 21:50:18 +0000 (21:50 +0000)]
powerpc: Ignore generated vmlinux.lds in git

Add a .gitignore in arch/powerpc/kernel to ignore the generated
vmlinux.lds.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agoMerge commit 'jwb/jwb-next'
Benjamin Herrenschmidt [Tue, 7 Oct 2008 00:15:07 +0000 (11:15 +1100)]
Merge commit 'jwb/jwb-next'

16 years agopowerpc/44x: Add AMCC Arches defconfig file
Victor Gallardo [Thu, 2 Oct 2008 06:29:26 +0000 (23:29 -0700)]
powerpc/44x: Add AMCC Arches defconfig file

Add a defconfig for the AMCC Arches evaluation board

Signed-off-by: Victor Gallardo <vgallardo@amcc.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agopowerpc/44x: Add AMCC Arches DTS
Victor Gallardo [Thu, 2 Oct 2008 06:29:16 +0000 (23:29 -0700)]
powerpc/44x: Add AMCC Arches DTS

Basic functionality for the AMCC Arches eval Board.

Signed-off-by: Victor Gallardo <vgallardo@amcc.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agopowerpc/44x: Add AMCC Arches eval board support
Victor Gallardo [Thu, 2 Oct 2008 06:29:06 +0000 (23:29 -0700)]
powerpc/44x: Add AMCC Arches eval board support

The Arches Evaluation board is based on the AMCC 460GT SoC chip.
This board is a dual processor board with each processor providing
independent resources for Rapid IO, Gigabit Ethernet, and serial
communications.  Each 460GT has it's own 512MB DDR2 memory, 32MB NOR FLASH,
UART, EEPROM and temperature sensor, along with a shared debug port.
The two 460GT's will communicate with each other via shared memory,
Gigabit Ethernet and x1 PCI-Express.

Signed-off-by: Victor Gallardo <vgallardo@amcc.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agoibm_newemac: Add support for GPCS, SGMII and M88E1112 PHY
Victor Gallardo [Thu, 2 Oct 2008 06:37:57 +0000 (23:37 -0700)]
ibm_newemac: Add support for GPCS, SGMII and M88E1112 PHY

Add support for the phy types found on the Arches and other
PowerPC 460 based boards.

Signed-off-by: Victor Gallardo <vgallardo@amcc.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agopowerpc/4xx: Allow 4xx PCI bridge to be disabled via device tree
Matthias Fuchs [Wed, 10 Sep 2008 05:55:46 +0000 (05:55 +0000)]
powerpc/4xx: Allow 4xx PCI bridge to be disabled via device tree

This patch allows the 4xx (conventional) PCI bridge to be disabled
via the device tree. This is needed for 4xx PCI adapter hardware.

Use the PCI node's status property to disable the PCI bridge.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agoMerge commit 'kumar/kumar-mmu'
Benjamin Herrenschmidt [Thu, 2 Oct 2008 06:11:49 +0000 (16:11 +1000)]
Merge commit 'kumar/kumar-mmu'

16 years agoMerge commit 'kumar/kumar-dma'
Benjamin Herrenschmidt [Thu, 2 Oct 2008 06:11:44 +0000 (16:11 +1000)]
Merge commit 'kumar/kumar-dma'

16 years agopowerpc/math-emu: Use kernel generic math-emu code
Kumar Gala [Wed, 4 Jun 2008 07:59:29 +0000 (02:59 -0500)]
powerpc/math-emu: Use kernel generic math-emu code

The math emulation code is centered around a set of generic macros that
provide the core of the emulation that are shared by the various
architectures and other projects (like glibc).  Each arch implements its
own sfp-machine.h to specific various arch specific details.

For historic reasons that are now lost the powerpc math-emu code had
its own version of the common headers.  This moves us to using the
kernel generic version and thus getting fixes when those are updated.

Also cleaned up exception/error reporting from the FP emulation functions.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agoibm_newemac: MAL support for PowerPC 405EZ
Josh Boyer [Thu, 4 Sep 2008 04:08:20 +0000 (04:08 +0000)]
ibm_newemac: MAL support for PowerPC 405EZ

The PowerPC 405EZ SoC has some differences in the interrupt layout and
handling for the MAL.  The SERR, TXDE, and RXDE interrupts are OR'd into
a single interrupt.  Also, due to the possibility for interrupt coalescing,
the TXEOB and RXEOB interrupts require an interrupt bit to be cleared in
the ICINTSTAT SDR.

This sets the proper MAL feature bits for 405EZ boards, and adds a common
shared handler for SERR, TXDE, and RXDE.  The defines for the ICINTSTAT DCR
are added to the proper header file as well.

This has been adapted from code originally written by Stefan Roese.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agoibm_newemac: Introduce mal_has_feature
Josh Boyer [Thu, 4 Sep 2008 04:03:45 +0000 (04:03 +0000)]
ibm_newemac: Introduce mal_has_feature

There are some PowerPC SoCs that do odd things with the MAL handling.  In
order to accommodate them, we need to introduce a feature mechanism that is
similar to the existing emac_has_feature function.

This adds a feature variable to the mal_instance structure, and adds a
mal_has_feature function.  Two features are defined and are guarded
by Kconfig options that are selected by the affected platforms.

MAL_FTR_CLEAR_ICINSTAT is used for platforms that need to clear the
interrupt bits in the ICINTSTAT SDR for txeob/rxeob.  This is common
on MAL implementations that have interrupt coalescing.

MAL_FTR_COMMON_ERR_INT is used for platforms that have SERR, TXDE,
and RXDE OR'd into a single interrupt bit.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agoibm_newemac: Allow the "no flow control" EMAC feature to work
Josh Boyer [Thu, 4 Sep 2008 02:57:57 +0000 (02:57 +0000)]
ibm_newemac: Allow the "no flow control" EMAC feature to work

Some PowerPC 40x chips have errata that force us not to use the integrated
flow control.  We have the feature defined, but it currently can't be used
because it is never added to EMAC_FTRS_POSSIBLE.

This adds a Kconfig option for affected platforms to select and puts the
feature in the EMAC_FTRS_POSSIBLE list.  This is set for PowerPC 405EZ
platforms as well.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years agopowerpc: Correct USB support for GE Fanuc SBC610
Martyn Welch [Mon, 29 Sep 2008 12:35:15 +0000 (13:35 +0100)]
powerpc: Correct USB support for GE Fanuc SBC610

Support for the SBC610 VPX Single Board Computer from GE Fanuc (PowerPC
MPC8641D).

Fixup to correctly reconfigure USB, provided by an NEC uPD720101, after
device is reset. This requires a set of chip specific registers in the
devices configuration space to be correctly written, enabling all ports
and switching the device to use an external 48-MHz Oscillator.

Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Drop redundant machine type print in show_cpuinfo
Becky Bruce [Wed, 24 Sep 2008 21:53:34 +0000 (16:53 -0500)]
powerpc: Drop redundant machine type print in show_cpuinfo

For many of the embedded boards, "model" and "Machine" are printing
the same thing; remove the redundant code and allow the generic
show_cpuinfo to print the model information.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Acked-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/fsl_soc: remove mpc83xx_wdt code
Anton Vorontsov [Mon, 29 Sep 2008 13:56:03 +0000 (17:56 +0400)]
powerpc/fsl_soc: remove mpc83xx_wdt code

mpc83xx_wdt is the OF driver now, so we don't need fsl_soc constructor.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agoserial/mpc52xx_uart: remove code associated with !CONFIG_PPC_MERGE
Kumar Gala [Fri, 1 Aug 2008 16:09:34 +0000 (11:09 -0500)]
serial/mpc52xx_uart: remove code associated with !CONFIG_PPC_MERGE

Now that arch/ppc is gone we don't need CONFIG_PPC_MERGE anymore
remove the dead code associated with !CONFIG_PPC_MERGE.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agoPOWERPC: Allow 32-bit hashed pgtable code to support 36-bit physical
Becky Bruce [Wed, 24 Sep 2008 16:01:24 +0000 (11:01 -0500)]
POWERPC: Allow 32-bit hashed pgtable code to support 36-bit physical

This rearranges a bit of code, and adds support for
36-bit physical addressing for configs that use a
hashed page table.  The 36b physical support is not
enabled by default on any config - it must be
explicitly enabled via the config system.

This patch *only* expands the page table code to accomodate
large physical addresses on 32-bit systems and enables the
PHYS_64BIT config option for 86xx.  It does *not*
allow you to boot a board with more than about 3.5GB of
RAM - for that, SWIOTLB support is also required (and
coming soon).

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/mm: Implement _PAGE_SPECIAL & pte_special() for 32-bit
Kumar Gala [Thu, 31 Jul 2008 13:41:10 +0000 (08:41 -0500)]
powerpc/mm: Implement _PAGE_SPECIAL & pte_special() for 32-bit

Implement _PAGE_SPECIAL and pte_special() for 32-bit powerpc. This bit will
be used by the fast get_user_pages() to differenciate PTEs that correspond
to a valid struct page from special mappings that don't such as IO mappings
obtained via io_remap_pfn_ranges().

We currently only implement this on sub-arch that support SMP or will so
in the future (6xx, 44x, FSL-BookE) and not (8xx, 40x).

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
16 years agopowerpc: Fixes for CONFIG_PTE_64BIT for SMP support
Kumar Gala [Wed, 16 Jul 2008 20:54:21 +0000 (15:54 -0500)]
powerpc: Fixes for CONFIG_PTE_64BIT for SMP support

There are some minor issues with support 64-bit PTEs on a 32-bit processor
when dealing with SMP.

* We need to order the stores in set_pte_at to make sure the flag word
  is set second.
* Change pte_clear to use pte_update so only the flag word is cleared
* Added a WARN_ON to set_pte_at to ensure the pte isn't present for
  the 64-bit pte/SMP case (to ensure our assumption of this fact).

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Becky Bruce <becky.bruce@freescale.com>
16 years agopowerpc: Introduce local (non-broadcast) forms of tlb invalidates
Kumar Gala [Tue, 15 Jul 2008 21:12:25 +0000 (16:12 -0500)]
powerpc: Introduce local (non-broadcast) forms of tlb invalidates

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: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Make dma_addr_t a u64 if CONFIG_PHYS_64BIT is set
Becky Bruce [Fri, 12 Sep 2008 10:53:43 +0000 (10:53 +0000)]
powerpc: Make dma_addr_t a u64 if CONFIG_PHYS_64BIT is set

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Merge 32 and 64-bit dma code
Becky Bruce [Fri, 12 Sep 2008 10:34:46 +0000 (10:34 +0000)]
powerpc: Merge 32 and 64-bit dma code

We essentially adopt the 64-bit dma code, with some changes to support
32-bit systems, including HIGHMEM.  dma functions on 32-bit are now
invoked via accessor functions which call the correct op for a device based
on archdata dma_ops.  If there is no archdata dma_ops, this defaults
to dma_direct_ops.

In addition, the dma_map/unmap_page functions are added to dma_ops
because we can't just fall back on map/unmap_single when HIGHMEM is
enabled. In the case of dma_direct_*, we stop using map/unmap_single
and just use the page version - this saves a lot of ugly
ifdeffing.  We leave map/unmap_single in the dma_ops definition,
though, because they are needed by the iommu code, which does not
implement map/unmap_page.  Ideally, going forward, we will completely
eliminate map/unmap_single and just have map/unmap_page, if it's
workable for 64-bit.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Drop archdata numa_node
Becky Bruce [Mon, 8 Sep 2008 09:09:54 +0000 (09:09 +0000)]
powerpc: Drop archdata numa_node

Use the struct device's numa_node instead; use accessor functions
to get/set numa_node.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Move iommu dma ops from dma.c to dma-iommu.c
Becky Bruce [Mon, 8 Sep 2008 09:09:53 +0000 (09:09 +0000)]
powerpc: Move iommu dma ops from dma.c to dma-iommu.c

32-bit platforms are about to start using dma.c; move the iommu
dma ops into their own file to make this a bit cleaner.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Rename dma_64.c to dma.c
Becky Bruce [Mon, 8 Sep 2008 09:09:52 +0000 (09:09 +0000)]
powerpc: Rename dma_64.c to dma.c

This is in preparation for the merge of the 32 and 64-bit
dma code in arch/powerpc.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Move 8xxx GPIO Kconfig under the platform menu
Kumar Gala [Wed, 24 Sep 2008 04:36:32 +0000 (23:36 -0500)]
powerpc: Move 8xxx GPIO Kconfig under the platform menu

The initial patch had the option at the top level which wasn't
quite right.  Moving under the platform options is a bit better.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/86xx: Introduce a generic mpc86xx_defconfig
Kumar Gala [Wed, 24 Sep 2008 04:32:32 +0000 (23:32 -0500)]
powerpc/86xx: Introduce a generic mpc86xx_defconfig

Introduced a mpc86xx_defconfig that enables all 86xx boards and moved
all other 86xx related defconfigs under configs/86xx to match 83xx
and 85xx.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/83xx: Add missing cell-index to dma-channel device nodes
Kumar Gala [Wed, 24 Sep 2008 03:05:10 +0000 (22:05 -0500)]
powerpc/83xx: Add missing cell-index to dma-channel device nodes

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: convert CONFIG_PPC_MERGE to CONFIG_PPC for legacy io checks
Kumar Gala [Mon, 22 Sep 2008 21:41:31 +0000 (14:41 -0700)]
powerpc: convert CONFIG_PPC_MERGE to CONFIG_PPC for legacy io checks

Now that arch/ppc is dead CONFIG_PPC_MERGE is always defined for all
powerpc platforms and we want to get rid of CONFIG_PPC_MERGE use
CONFIG_PPC instead.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: gpio driver for mpc8349/8572/8610 and compatible
Peter Korsgaard [Tue, 23 Sep 2008 15:35:38 +0000 (17:35 +0200)]
powerpc: gpio driver for mpc8349/8572/8610 and compatible

Structured similar to the existing QE GPIO support.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agoMerge branch 'powerpc-next' of master.kernel.org:/pub/scm/linux/kernel/git/galak...
Paul Mackerras [Sun, 21 Sep 2008 23:18:21 +0000 (18:18 -0500)]
Merge branch 'powerpc-next' of /linux/kernel/git/galak/powerpc

16 years agoMerge branch 'next' of ssh://master.kernel.org/pub/scm/linux/kernel/git/jwboyer/power...
Paul Mackerras [Sun, 21 Sep 2008 23:17:25 +0000 (18:17 -0500)]
Merge branch 'next' of ssh:///linux/kernel/git/jwboyer/powerpc-4xx

16 years agocpm_uart: Pass actual dev ptr to dma_* in ucc and cpm_uart serial
Becky Bruce [Fri, 12 Sep 2008 15:42:56 +0000 (10:42 -0500)]
cpm_uart: Pass actual dev ptr to dma_* in ucc and cpm_uart serial

We're currently passing NULL, and really shouldn't be.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Acked-By: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/fsl-booke: Fixup 64-bit PTE reading for SMP support
Kumar Gala [Wed, 16 Jul 2008 21:17:08 +0000 (16:17 -0500)]
powerpc/fsl-booke: Fixup 64-bit PTE reading for SMP support

We need to create a false data dependency to ensure the loads of
the pte are done in the right order.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Fix build warnings introduced by PMC support on 32-bit
Kumar Gala [Thu, 18 Sep 2008 22:50:42 +0000 (17:50 -0500)]
powerpc: Fix build warnings introduced by PMC support on 32-bit

arch/powerpc/kernel/sysfs.c:197:7: warning: "CONFIG_6xx" is not defined
arch/powerpc/kernel/sysfs.c:141: warning: 'run_on_cpu' defined but not used

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: add SSI-to-DMA properties to Freescale MPC8610 HPCD device tree
Timur Tabi [Wed, 6 Aug 2008 16:48:25 +0000 (11:48 -0500)]
powerpc: add SSI-to-DMA properties to Freescale MPC8610 HPCD device tree

Add the fsl,playback-dma and fsl,capture-dma properties to the Freescale
MPC8610 HPCD device tree.  These properties connect the SSI nodes to the
DMA nodes for the DMA channels that the SSI should use.  Also update the
ssi.txt documentation.

These properties will be needed when the ASoC V2 version of the Freescale
MPC8610 device drivers are merged into the mainline.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/cpm1: Fix race condition in CPM1 GPIO library.
Jochen Friedrich [Wed, 27 Aug 2008 10:32:25 +0000 (12:32 +0200)]
powerpc/cpm1: Fix race condition in CPM1 GPIO library.

The CPM1 GPIO library code uses the non thread-safe clrbits32/setbits32
macros. This patch protects them with a spinlock.

Based on the CPM2 patch from Laurent Pinchart <laurentp@cse-semaphore.com>,
commit 639d64456e20cbfc866b18dc03cf9f9babc9c7cd.

Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Default configuration for GE Fanuc SBC610
Martyn Welch [Tue, 16 Sep 2008 09:57:52 +0000 (10:57 +0100)]
powerpc: Default configuration for GE Fanuc SBC610

Support for the SBC610 VPX Single Board Computer from GE Fanuc (PowerPC
MPC8641D).

This is the default config file for GE Fanuc's SBC610, a 6U single board
computer, based on Freescale's MPC8641D.

Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Board support for GE Fanuc SBC610
Martyn Welch [Tue, 16 Sep 2008 09:57:47 +0000 (10:57 +0100)]
powerpc: Board support for GE Fanuc SBC610

Support for the SBC610 VPX Single Board Computer from GE Fanuc (PowerPC
MPC8641D).

This is the basic board support for GE Fanuc's SBC610, a 6U single board
computer, based on Freescale's MPC8641D.

Signed-off-by: Martyn Welch <martyn.welch@gefanuc.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/sbc8560: fix compile warning on CPM pin array
Paul Gortmaker [Wed, 3 Sep 2008 20:02:25 +0000 (16:02 -0400)]
powerpc/sbc8560: fix compile warning on CPM pin array

This is just a parallel of a5dc66e2ab2e2cf641346b056a69a67cfcf9458c
applied to the sbc8560 board.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agomath-emu: Add support for reporting exact invalid exception
Kumar Gala [Fri, 27 Jun 2008 14:39:00 +0000 (09:39 -0500)]
math-emu: Add support for reporting exact invalid exception

Some architectures (like powerpc) provide status information on the exact
type of invalid exception.  This is pretty straight forward as we already
report invalid exceptions via FP_SET_EXCEPTION.

We add new flags (FP_EX_INVALID_*) the architecture code can define if it
wants the exact invalid exception reported.

We had to split out the INF/INF and 0/0 cases for divide to allow reporting
the two invalid forms properly.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: David S. Miller <davem@davemloft.net>
16 years agomath-emu: Fix compiler warnings
Kumar Gala [Fri, 27 Jun 2008 14:33:59 +0000 (09:33 -0500)]
math-emu: Fix compiler warnings

Fix warnings of the form:
arch/powerpc/math-emu/fsubs.c:15: warning: 'R_f1' may be used uninitialized in this function
arch/powerpc/math-emu/fsubs.c:15: warning: 'R_f0' may be used uninitialized in this function

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/85xx: fix build warning, remove silly cast
Becky Bruce [Thu, 21 Aug 2008 18:50:22 +0000 (13:50 -0500)]
powerpc/85xx: fix build warning, remove silly cast

This fixes a build warning when PHYS_64BIT is enabled, and removes an
unnecessary cast to phys_addr_t (the variable being cast is already
a phys_addr_t)

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc/83xx: mpc836x_mds: add support for the nor flash
Anton Vorontsov [Thu, 14 Aug 2008 17:13:42 +0000 (21:13 +0400)]
powerpc/83xx: mpc836x_mds: add support for the nor flash

This patch adds the localbus node, moves the bcsr node into the
localbus node, and adds the flash node.

Also enable MTD support in the defconfig.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agoserial/cpm_uart: Remove dead Kconfig options
Kumar Gala [Mon, 4 Aug 2008 13:27:52 +0000 (08:27 -0500)]
serial/cpm_uart: Remove dead Kconfig options

With the change to device tree based setup we no longer need the explicit
Kconfig options for each SCC{1,4} or SMC{1,2} port.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Add support for mpc8247 based board MGCOGE from keymile.
Heiko Schocher [Wed, 18 Jun 2008 08:38:32 +0000 (10:38 +0200)]
powerpc: Add support for mpc8247 based board MGCOGE from keymile.

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Add support for the MPC852 based mgsuvd board from keymile.
Heiko Schocher [Sat, 14 Jun 2008 19:02:04 +0000 (21:02 +0200)]
powerpc: Add support for the MPC852 based mgsuvd board from keymile.

Supported SMC1 (serial console), SCC3 Ethernet (10Mbps hdx).

Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years agopowerpc: Fix major revision number for Freescale cores
Martin Langer [Sun, 7 Sep 2008 07:51:32 +0000 (17:51 +1000)]
powerpc: Fix major revision number for Freescale cores

Some 74xx cores by Freescale are using the configuration field instead
of the major revision field for their revision number.  This corrects
the wrong behaviour for those ppc cores including my one.

There is a reference document at Freecale.  It describes the PVR
register.  This is based on that pdf.  You can find the document at:

http://www.freescale.com/files/archives/doc/support_info/PPCPVR.pdf

Signed-off-by: Martin Langer <martin-langer@gmx.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Clean up hugepage pagetable allocation for powerpc with 16G pages
David Gibson [Fri, 5 Sep 2008 01:49:54 +0000 (11:49 +1000)]
powerpc: Clean up hugepage pagetable allocation for powerpc with 16G pages

There is a small bug in the handling of 16G hugepages recently added
to the kernel.  This doesn't cause a crash or other user-visible
problems, but it does mean that more levels of pagetable are allocated
than makes sense for 16G pages.  The hugepage pagetables for the 16G
pages are allocated much lower in the pagetable tree than they should
be, with the intervening levels allocated with full pmd and pud pages
which will only ever have one entry filled in.

This corrects this problem, at the same time cleaning up the handling
of which level 64k versus 16M hugepage pagetables are allocated at.
The new way of formatting the tests should be more robust against
changes in pagetable structure, or any newly added hugepage sizes.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Make the irq reverse mapping radix tree lockless
Sebastien Dugue [Thu, 4 Sep 2008 12:37:08 +0000 (22:37 +1000)]
powerpc: Make the irq reverse mapping radix tree lockless

The radix trees used by interrupt controllers for their irq reverse
mapping (currently only the XICS found on pSeries) have a complex
locking scheme dating back to before the advent of the lockless radix
tree.

This takes advantage of the lockless radix tree and of the fact that
the items of the tree are pointers to a static array (irq_map)
elements which can never go under us to simplify the locking.

Concurrency between readers and writers is handled by the intrinsic
properties of the lockless radix tree.  Concurrency between writers is
handled with a global mutex.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Separate the irq radix tree insertion and lookup
Sebastien Dugue [Thu, 4 Sep 2008 12:37:07 +0000 (22:37 +1000)]
powerpc: Separate the irq radix tree insertion and lookup

irq_radix_revmap() currently serves 2 purposes, irq mapping lookup
and insertion which happen in interrupt and process context respectively.

Separate the function into its 2 components, one for lookup only and one
for insertion only.

Fix the only user of the revmap tree (XICS) to use the new functions.

Also, move the insertion into the radix tree of those irqs that were
requested before it was initialized at said tree initialization.

Mutual exclusion between the tree initialization and readers/writers is
handled via a state variable (revmap_trees_allocated) set to 1 when the tree
has been initialized and set to 2 after the already requested irqs have been
inserted in the tree by the init path. This state is checked before any reader
or writer access just like we used to check for tree.gfp_mask != 0 before.

Finally, now that we're not any longer inserting nodes into the radix-tree
in interrupt context, turn the GFP_ATOMIC allocations into GFP_KERNEL ones.

Signed-off-by: Sebastien Dugue <sebastien.dugue@bull.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Rename PTE_SIZE to HPTE_SIZE
Becky Bruce [Wed, 3 Sep 2008 15:37:53 +0000 (01:37 +1000)]
powerpc: Rename PTE_SIZE to HPTE_SIZE

It's the size of the hardware PTE; make that clear in the name.

Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Enforce a non-spe kernel build even on broken compilers
Thiemo Seufer [Mon, 1 Sep 2008 14:23:02 +0000 (00:23 +1000)]
powerpc: Enforce a non-spe kernel build even on broken compilers

Those two are required on my fresh gcc 4.3.1.

Signed-off-by: Thiemo Seufer <ths@linutronix.de>
Signed-off-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Use sys_pause for 32-bit pause entry point
Christoph Hellwig [Mon, 1 Sep 2008 01:23:30 +0000 (11:23 +1000)]
powerpc: Use sys_pause for 32-bit pause entry point

sys32_pause is a useless copy of the generic sys_pause.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Make the 64-bit kernel as a position-independent executable
Paul Mackerras [Sat, 30 Aug 2008 01:43:47 +0000 (11:43 +1000)]
powerpc: Make the 64-bit kernel as a position-independent executable

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 <paulus@samba.org>
16 years agopowerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit
Paul Mackerras [Sat, 30 Aug 2008 01:41:12 +0000 (11:41 +1000)]
powerpc: Use LOAD_REG_IMMEDIATE only for constants on 64-bit

Using LOAD_REG_IMMEDIATE to get the address of kernel symbols
generates 5 instructions where LOAD_REG_ADDR can do it in one,
and will generate R_PPC64_ADDR16_* relocations in the output when
we get to making the kernel as a position-independent executable,
which we'd rather not have to handle.  This changes various bits
of assembly code to use LOAD_REG_ADDR when we need to get the
address of a symbol, or to use suitable position-independent code
for cases where we can't access the TOC for various reasons, or
if we're not running at the address we were linked at.

It also cleans up a few minor things; there's no reason to save and
restore SRR0/1 around RTAS calls, __mmu_off can get the return
address from LR more conveniently than the caller can supply it in
R4 (and we already assume elsewhere that EA == RA if the MMU is on
in early boot), and enable_64b_mode was using 5 instructions where
2 would do.

Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Make it possible to move the interrupt handlers away from the kernel
Paul Mackerras [Sat, 30 Aug 2008 01:40:24 +0000 (11:40 +1000)]
powerpc: Make it possible to move the interrupt handlers away from the kernel

This changes the way that the exception prologs transfer control to
the handlers in 64-bit kernels with the aim of making it possible to
have the prologs separate from the main body of the kernel.  Now,
instead of computing the address of the handler by taking the top
32 bits of the paca address (to get the 0xc0000000........ part) and
ORing in something in the bottom 16 bits, we get the base address of
the kernel by doing a load from the paca and add an offset.

This also replaces an mfmsr and an ori to compute the MSR value for
the handler with a load from the paca.  That makes it unnecessary to
have a separate version of EXCEPTION_PROLOG_PSERIES that forces 64-bit
mode.

We can no longer use a direct branches in the exception prolog code,
which means that the SLB miss handlers can't branch directly to
.slb_miss_realmode any more.  Instead we have to compute the address
and do an indirect branch.  This is conditional on CONFIG_RELOCATABLE;
for non-relocatable kernels we use a direct branch as before.  (A later
change will allow CONFIG_RELOCATABLE to be set on 64-bit powerpc.)

Since the secondary CPUs on pSeries start execution in the first 0x100
bytes of real memory and then have to get to wherever the kernel is,
we can't use a direct branch to get there.  Instead this changes
__secondary_hold_spinloop from a flag to a function pointer.  When it
is set to a non-NULL value, the secondary CPUs jump to the function
pointed to by that value.

Finally this eliminates one code difference between 32-bit and 64-bit
by making __secondary_hold be the text address of the secondary CPU
spinloop rather than a function descriptor for it.

Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Rearrange head_64.S to move interrupt handler code to the beginning
Paul Mackerras [Sat, 30 Aug 2008 01:39:26 +0000 (11:39 +1000)]
powerpc: Rearrange head_64.S to move interrupt handler code to the beginning

This rearranges head_64.S so that we have all the first-level exception
prologs together starting at 0x100, followed by all the second-level
handlers that are invoked from the first-level prologs, followed by
other code.  This doesn't make any functional change but will make
following changes for relocatable kernel support easier.

Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Add support for dynamic reconfiguration memory in kexec/kdump kernels
Chandru [Fri, 29 Aug 2008 14:28:16 +0000 (00:28 +1000)]
powerpc: Add support for dynamic reconfiguration memory in kexec/kdump kernels

Kdump kernel needs to use only those memory regions that it is allowed
to use (crashkernel, rtas, tce, etc.).  Each of these regions have
their own sizes and are currently added under 'linux,usable-memory'
property under each memory@xxx node of the device tree.

The ibm,dynamic-memory property of ibm,dynamic-reconfiguration-memory
node (on POWER6) now stores in it the representation for most of the
logical memory blocks with the size of each memory block being a
constant (lmb_size).  If one or more or part of the above mentioned
regions lie under one of the lmb from ibm,dynamic-memory property,
there is a need to identify those regions within the given lmb.

This makes the kernel recognize a new 'linux,drconf-usable-memory'
property added by kexec-tools.  Each entry in this property is of the
form of a count followed by that many (base, size) pairs for the above
mentioned regions.  The number of cells in the count value is given by
the #size-cells property of the root node.

Signed-off-by: Chandru Siddalingappa <chandru@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Check rc of notifier chain for memory remove
Nathan Fontenot [Mon, 25 Aug 2008 19:33:34 +0000 (05:33 +1000)]
powerpc: Check rc of notifier chain for memory remove

The return code from invocation of the notifier for
pSeries_reconfig_chain during update of the device tree is not
checked.  This causes writes to /proc/ppc64/ofdt to update memory
properties (i.e. ibm,dyamic-reconfiguration-memory) to always
return success, instead of the result of the notifier chain.

This happens specifically when we remove/add memory from the
device tree on machines using memory specified in the
ibm,dynamic-reconfiguration-memory property of the device tree.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: New copy_4K_page()
Mark Nelson [Fri, 22 Aug 2008 04:39:00 +0000 (14:39 +1000)]
powerpc: New copy_4K_page()

This new copy_4K_page() function was originally tuned for the best
performance on the Cell processor, but after testing on more 64bit
powerpc chips it was found that with a small modification it either
matched the performance offered by the current mainline version or
bettered it by a small amount.

It was found that on a Cell-based QS22 blade the amount of system
time measured when compiling a 2.6.26 pseries_defconfig decreased
by 4%. Using the same test, a 4-way 970MP machine saw a decrease of
2% in system time. No noticeable change was seen on Power4, Power5
or Power6.

The 4096 byte page is copied in thirty-two 128 byte strides. An
initial setup loop executes dcbt instructions for the whole source
page and dcbz instructions for the whole destination page. To do
this, the cache line size is retrieved from ppc64_caches.

A new CPU feature bit, CPU_FTR_CP_USE_DCBTZ, (introduced in the
previous patch) is used to make the modification to this new copy
routine - on Power4, 970 and Cell the feature bit is set so the
setup loop is executed, but on all other 64bit chips the setup
loop is nop'ed out.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Add new CPU feature: CPU_FTR_CP_USE_DCBTZ
Mark Nelson [Fri, 22 Aug 2008 04:36:19 +0000 (14:36 +1000)]
powerpc: Add new CPU feature: CPU_FTR_CP_USE_DCBTZ

Add a new CPU feature bit, CPU_FTR_CP_USE_DCBTZ, to be added to the
64bit powerpc chips that benefit from having dcbt and dcbz
instructions used in their memory copy routines.

This will be used in a subsequent patch that updates copy_4K_page().
The new bit is added to Cell, PPC970 and Power4 because they show
better performance with the new copy_4K_page() when dcbt and dcbz
instructions are used.

Signed-off-by: Mark Nelson <markn@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agopowerpc: Fix duplicate test of MACIO_FLAG_SCCB_ON
roel kluin [Mon, 18 Aug 2008 22:34:17 +0000 (08:34 +1000)]
powerpc: Fix duplicate test of MACIO_FLAG_SCCB_ON

Evidently MACIO_FLAG_SCCA_ON was meant.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
16 years agoMerge branch 'linux-2.6'
Paul Mackerras [Wed, 10 Sep 2008 01:36:13 +0000 (11:36 +1000)]
Merge branch 'linux-2.6'

16 years agoMerge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 9 Sep 2008 19:23:41 +0000 (12:23 -0700)]
Merge branch 'x86-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: fix memmap=exactmap boot argument
  x86: disable static NOPLs on 32 bits
  xen: fix 2.6.27-rc5 xen balloon driver warnings

16 years agox86: fix memmap=exactmap boot argument
Prarit Bhargava [Tue, 9 Sep 2008 13:56:08 +0000 (09:56 -0400)]
x86: fix memmap=exactmap boot argument

When using kdump modifying the e820 map is yielding strange results.

For example starting with

 BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000100 - 0000000000093400 (usable)
 BIOS-e820: 0000000000093400 - 00000000000a0000 (reserved)
 BIOS-e820: 0000000000100000 - 000000003fee0000 (usable)
 BIOS-e820: 000000003fee0000 - 000000003fef3000 (ACPI data)
 BIOS-e820: 000000003fef3000 - 000000003ff80000 (ACPI NVS)
 BIOS-e820: 000000003ff80000 - 0000000040000000 (reserved)
 BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
 BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
 BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
 BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved)

and booting with args

memmap=exactmap memmap=640K@0K memmap=5228K@16384K memmap=125188K@22252K memmap=76K#1047424K memmap=564K#1047500K

resulted in:

 user-defined physical RAM map:
 user: 0000000000000000 - 0000000000093400 (usable)
 user: 0000000000093400 - 00000000000a0000 (reserved)
 user: 0000000000100000 - 000000003fee0000 (usable)
 user: 000000003fee0000 - 000000003fef3000 (ACPI data)
 user: 000000003fef3000 - 000000003ff80000 (ACPI NVS)
 user: 000000003ff80000 - 0000000040000000 (reserved)
 user: 00000000e0000000 - 00000000f0000000 (reserved)
 user: 00000000fec00000 - 00000000fec10000 (reserved)
 user: 00000000fee00000 - 00000000fee01000 (reserved)
 user: 00000000ff000000 - 0000000100000000 (reserved)

But should have resulted in:

 user-defined physical RAM map:
 user: 0000000000000000 - 00000000000a0000 (usable)
 user: 0000000001000000 - 000000000151b000 (usable)
 user: 00000000015bb000 - 0000000008ffc000 (usable)
 user: 000000003fee0000 - 000000003ff80000 (ACPI data)

This is happening because of an improper usage of strcmp() in the
e820 parsing code.  The strcmp() always returns !0 and never resets the
value for e820.nr_map and returns an incorrect user-defined map.

This patch fixes the problem.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
16 years agoMerge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6
Linus Torvalds [Tue, 9 Sep 2008 18:53:05 +0000 (11:53 -0700)]
Merge branch 'for-linus' of git://git390.osdl.marist.edu/linux-2.6

* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6:
  [S390] cio: allow offline processing for disconnected devices
  [S390] cio: handle ssch() return codes correctly.
  [S390] cio: Correct cleanup on error.
  [S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode

16 years agoMerge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
Linus Torvalds [Tue, 9 Sep 2008 18:52:34 +0000 (11:52 -0700)]
Merge branch 'upstream' of git://ftp.linux-mips.org/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  [MIPS] IP22: Fix detection of second HPC3 on Challenge S

16 years agoMerge branch 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6
Linus Torvalds [Tue, 9 Sep 2008 18:52:12 +0000 (11:52 -0700)]
Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6

* 'linux-next' of git://git.infradead.org/~dedekind/ubifs-2.6:
  UBIFS: make minimum fanout 3
  UBIFS: fix division by zero
  UBIFS: amend f_fsid
  UBIFS: fill f_fsid
  UBIFS: improve statfs reporting even more
  UBIFS: introduce LEB overhead
  UBIFS: add forgotten gc_idx_lebs component
  UBIFS: fix assertion
  UBIFS: improve statfs reporting
  UBIFS: remove incorrect index space check
  UBIFS: push empty flash hack down
  UBIFS: do not update min_idx_lebs in stafs
  UBIFS: allow for racing between GC and TNC
  UBIFS: always read hashed-key nodes under TNC mutex
  UBIFS: fix zero-length truncations

16 years agolib: Correct printk %pF to work on all architectures
James Bottomley [Thu, 4 Sep 2008 01:43:36 +0000 (20:43 -0500)]
lib: Correct printk %pF to work on all architectures

It was introduced by "vsprintf: add support for '%pS' and '%pF' pointer
formats" in commit 0fe1ef24f7bd0020f29ffe287dfdb9ead33ca0b2.  However,
the current way its coded doesn't work on parisc64.  For two reasons: 1)
parisc isn't in the #ifdef and 2) parisc has a different format for
function descriptors

Make dereference_function_descriptor() more accommodating by allowing
architecture overrides.  I put the three overrides (for parisc64, ppc64
and ia64) in arch/kernel/module.c because that's where the kernel
internal linker which knows how to deal with function descriptors sits.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMAINTAINERS: add Atheros maintainer for atlx
Chris Snook [Tue, 9 Sep 2008 07:26:57 +0000 (03:26 -0400)]
MAINTAINERS: add Atheros maintainer for atlx

Jie Yang at Atheros is getting more directly involved with upstream work
on the atl* drivers.  This patch changes the ATL1 entry to ATLX (atl2
support posted to netdev today) and adds him as a maintainer.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoupdate Documentation/filesystems/Locking for 2.6.27 changes
Christoph Hellwig [Tue, 9 Sep 2008 18:02:01 +0000 (20:02 +0200)]
update Documentation/filesystems/Locking for 2.6.27 changes

In the 2.6.27 circle ->fasync lost the BKL, and the last remaining
->open variant that takes the BKL is also gone.  ->get_sb and ->kill_sb
didn't have BKL forever, so updated the entries while we're at that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agopowerpc/44x: Add hwmon support to Sequoia device tree
Matthias Fuchs [Sun, 7 Sep 2008 21:57:21 +0000 (21:57 +0000)]
powerpc/44x: Add hwmon support to Sequoia device tree

This patch adds support for the AD7414 temperature sensor
on Sequoia PPC440EPx board.

Signed-off-by: Matthias Fuchs <matthias.fuchs@esd-electronics.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
16 years ago[S390] cio: allow offline processing for disconnected devices
Peter Oberparleiter [Tue, 9 Sep 2008 10:38:59 +0000 (12:38 +0200)]
[S390] cio: allow offline processing for disconnected devices

When disconnected ccw devices are removed, the device has to be set
offline, otherwise there will be side effects including a reference
count imbalance. This patch modifies ccw_device_offline to work for
devices in disconnecte/not operational state. ccw_device_offline is
called by cio for devices which are online during device removal.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
16 years ago[S390] cio: handle ssch() return codes correctly.
Cornelia Huck [Tue, 9 Sep 2008 10:38:58 +0000 (12:38 +0200)]
[S390] cio: handle ssch() return codes correctly.

ssch() has two classes of return codes:
- condition codes (0-3) which need to be translated to Linux
  error codes
- Linux error codes (-EIO on exceptions) which should be passed
  to the caller (instead of erronously being handled like
  condition code 3)

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
16 years ago[S390] cio: Correct cleanup on error.
Cornelia Huck [Tue, 9 Sep 2008 10:38:57 +0000 (12:38 +0200)]
[S390] cio: Correct cleanup on error.

Fix cleanup on error in chp_new() and init_channel_subsystem()
(must not call kfree() on structures that had been registered).

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
16 years ago[S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode
Jarod Wilson [Tue, 9 Sep 2008 10:38:56 +0000 (12:38 +0200)]
[S390] CVE-2008-1514: prevent ptrace padding area read/write in 31-bit mode

When running a 31-bit ptrace, on either an s390 or s390x kernel,
reads and writes into a padding area in struct user_regs_struct32
will result in a kernel panic.

This is also known as CVE-2008-1514.

Test case available here:
http://sources.redhat.com/cgi-bin/cvsweb.cgi/~checkout~/tests/ptrace-tests/tests/user-area-padding.c?cvsroot=systemtap

Steps to reproduce:
1) wget the above
2) gcc -o user-area-padding-31bit user-area-padding.c -Wall -ggdb2 -D_GNU_SOURCE -m31
3) ./user-area-padding-31bit
<panic>

Test status
-----------
Without patch, both s390 and s390x kernels panic. With patch, the test case,
as well as the gdb testsuite, pass without incident, padding area reads
returning zero, writes ignored.

Nb: original version returned -EINVAL on write attempts, which broke the
gdb test and made the test case slightly unhappy, Jan Kratochvil suggested
the change to return 0 on write attempts.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Tested-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
16 years agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen...
Linus Torvalds [Mon, 8 Sep 2008 22:55:18 +0000 (15:55 -0700)]
Merge branch 'master' of git://git./linux/kernel/git/hskinnemoen/avr32-2.6

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
  avr32: pm_standby low-power ram bug fix
  avr32: Fix lockup after Java stack underflow in user mode

16 years agoMerge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
Linus Torvalds [Mon, 8 Sep 2008 22:54:32 +0000 (15:54 -0700)]
Merge branch 'merge' of git://git./linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  powerpc: Fix rare boot build breakage
  powerpc/spufs: Fix possible scheduling of a context to multiple SPEs
  powerpc/spufs: Fix race for a free SPU
  powerpc/spufs: Fix multiple get_spu_context()

16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Mon, 8 Sep 2008 22:51:12 +0000 (15:51 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  Revert "crypto: camellia - Use kernel-provided bitops, unaligned access helpers"

16 years agoMerge master.kernel.org:/home/rmk/linux-2.6-arm
Linus Torvalds [Mon, 8 Sep 2008 22:50:19 +0000 (15:50 -0700)]
Merge master.kernel.org:/home/rmk/linux-2.6-arm

* master.kernel.org:/home/rmk/linux-2.6-arm:
  [ARM] 5241/1: provide ioremap_wc()
  [ARM] omap: fix virtual vs physical address space confusions
  [ARM] remove unused #include <version.h>
  [ARM] omap: fix build error in ohci-omap.c
  [ARM] omap: fix gpio.c build error

16 years agoMerge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 8 Sep 2008 22:47:21 +0000 (15:47 -0700)]
Merge branch 'sched-fixes-for-linus' of git://git./linux/kernel/git/tip/linux-2.6-tip

* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sched: arch_reinit_sched_domains() must destroy domains to force rebuild
  sched, cpuset: rework sched domains and CPU hotplug handling (v4)

16 years agoMerge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzi...
Linus Torvalds [Mon, 8 Sep 2008 22:46:56 +0000 (15:46 -0700)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  ahci: RAID mode SATA patch for Intel Ibex Peak DeviceIDs
  pata_sil680: remove duplicate pcim_enable_device
  libata-sff: kill spurious WARN_ON() in ata_hsm_move()
  sata_nv: disable hardreset for generic
  ahci: disable PMP for marvell ahcis
  sata_mv: add RocketRaid 1720 PCI ID to driver
  ahci, pata_marvell: play nicely together

16 years agoFix format of MAINTAINERS
Uwe Kleine-König [Mon, 8 Sep 2008 22:11:39 +0000 (00:11 +0200)]
Fix format of MAINTAINERS

... one entry lacked a colon which broke one of my scripts.

Signed-off-by: Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
Linus Torvalds [Mon, 8 Sep 2008 22:43:44 +0000 (15:43 -0700)]
Merge git://git./linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  bridge: don't allow setting hello time to zero
  netns : fix kernel panic in timewait socket destruction
  pkt_sched: Fix qdisc state in net_tx_action()
  netfilter: nf_conntrack_irc: make sure string is terminated before calling simple_strtoul
  netfilter: nf_conntrack_gre: nf_ct_gre_keymap_flush() fixlet
  netfilter: nf_conntrack_gre: more locking around keymap list
  netfilter: nf_conntrack_sip: de-static helper pointers

16 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
Linus Torvalds [Mon, 8 Sep 2008 22:43:02 +0000 (15:43 -0700)]
Merge git://git./linux/kernel/git/davem/sparc-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
  sparc64: Prevent sparc64 from invoking irq handlers on offline CPUs
  sparc64: Fix IPI call locking.

16 years agousb: fix null deferences in low level usb serial
Jason Wessel [Mon, 8 Sep 2008 13:53:37 +0000 (14:53 +0100)]
usb: fix null deferences in low level usb serial

The hw interface drivers for the usb serial devices deference the tty
structure to set up the parameters for the initial console.  The tty
structure should be passed as a parameter to the set_termios() call.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agoNFS: Restore missing hunk in NFS mount option parser
Chuck Lever [Mon, 8 Sep 2008 15:58:13 +0000 (11:58 -0400)]
NFS: Restore missing hunk in NFS mount option parser

Automounter maps can contain mount options valid for other NFS
implementations but not for Linux.  The Linux automounter uses the
mount command's "-s" command line option ("s" for "sloppy") so that
mount requests containing such options are not rejected.

Commit f45663ce5fb30f76a3414ab3ac69f4dd320e760a attempted to address a
known regression with text-based NFS mount option parsing.  Unrecognized
mount options would cause mount requests to fail, even if the "-s"
option was used on the mount command line.

Unfortunately, this commit was not complete as submitted.  It adds a
new mount option, "sloppy".  But it is missing a hunk, so it now allows
NFS mounts with unrecognized mount options, even if the "sloppy" option
is not present.  This could be a problem if a required critical mount
option such as "sync" is misspelled, for example, and is considered a
regression from 2.6.26.

This patch restores the missing hunk.  Now, the default behavior of
text-based NFS mount options is as before: any unrecognized mount option
will cause the mount to fail.

Please include this in 2.6.27-rc.

Thanks to Neil Brown for reporting this.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Acked-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
16 years agobridge: don't allow setting hello time to zero
Stephen Hemminger [Mon, 8 Sep 2008 20:44:40 +0000 (13:44 -0700)]
bridge: don't allow setting hello time to zero

Dushan Tcholich reports that on his system ksoftirqd can consume
between %6 to %10 of cpu time, and cause ~200 context switches per
second.

He then correlated this with a report by bdupree@techfinesse.com:

http://marc.info/?l=linux-kernel&m=119613299024398&w=2

and the culprit cause seems to be starting the bridge interface.
In particular, when starting the bridge interface, his scripts
are specifying a hello timer interval of "0".

The bridge hello time can't be safely set to values less than 1
second, otherwise it is possible to end up with a runaway timer.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agonetns : fix kernel panic in timewait socket destruction
Daniel Lezcano [Mon, 8 Sep 2008 20:17:27 +0000 (13:17 -0700)]
netns : fix kernel panic in timewait socket destruction

How to reproduce ?
 - create a network namespace
 - use tcp protocol and get timewait socket
 - exit the network namespace
 - after a moment (when the timewait socket is destroyed), the kernel
   panics.

# BUG: unable to handle kernel NULL pointer dereference at
0000000000000007
IP: [<ffffffff821e394d>] inet_twdr_do_twkill_work+0x6e/0xb8
PGD 119985067 PUD 11c5c0067 PMD 0
Oops: 0000 [1] SMP
CPU 1
Modules linked in: ipv6 button battery ac loop dm_mod tg3 libphy ext3 jbd
edd fan thermal processor thermal_sys sg sata_svw libata dock serverworks
sd_mod scsi_mod ide_disk ide_core [last unloaded: freq_table]
Pid: 0, comm: swapper Not tainted 2.6.27-rc2 #3
RIP: 0010:[<ffffffff821e394d>] [<ffffffff821e394d>]
inet_twdr_do_twkill_work+0x6e/0xb8
RSP: 0018:ffff88011ff7fed0 EFLAGS: 00010246
RAX: ffffffffffffffff RBX: ffffffff82339420 RCX: ffff88011ff7ff30
RDX: 0000000000000001 RSI: ffff88011a4d03c0 RDI: ffff88011ac2fc00
RBP: ffffffff823392e0 R08: 0000000000000000 R09: ffff88002802a200
R10: ffff8800a5c4b000 R11: ffffffff823e4080 R12: ffff88011ac2fc00
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
FS: 0000000041cbd940(0000) GS:ffff8800bff839c0(0000)
knlGS:0000000000000000
CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000007 CR3: 00000000bd87c000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffff8800bff9e000, task
ffff88011ff76690)
Stack: ffffffff823392e0 0000000000000100 ffffffff821e3a3a
0000000000000008
0000000000000000 ffffffff821e3a61 ffff8800bff7c000 ffffffff8203c7e7
ffff88011ff7ff10 ffff88011ff7ff10 0000000000000021 ffffffff82351108
Call Trace:
<IRQ> [<ffffffff821e3a3a>] ? inet_twdr_hangman+0x0/0x9e
[<ffffffff821e3a61>] ? inet_twdr_hangman+0x27/0x9e
[<ffffffff8203c7e7>] ? run_timer_softirq+0x12c/0x193
[<ffffffff820390d1>] ? __do_softirq+0x5e/0xcd
[<ffffffff8200d08c>] ? call_softirq+0x1c/0x28
[<ffffffff8200e611>] ? do_softirq+0x2c/0x68
[<ffffffff8201a055>] ? smp_apic_timer_interrupt+0x8e/0xa9
[<ffffffff8200cad6>] ? apic_timer_interrupt+0x66/0x70
<EOI> [<ffffffff82011f4c>] ? default_idle+0x27/0x3b
[<ffffffff8200abbd>] ? cpu_idle+0x5f/0x7d

Code: e8 01 00 00 4c 89 e7 41 ff c5 e8 8d fd ff ff 49 8b 44 24 38 4c 89 e7
65 8b 14 25 24 00 00 00 89 d2 48 8b 80 e8 00 00 00 48 f7 d0 <48> 8b 04 d0
48 ff 40 58 e8 fc fc ff ff 48 89 df e8 c0 5f 04 00
RIP [<ffffffff821e394d>] inet_twdr_do_twkill_work+0x6e/0xb8
RSP <ffff88011ff7fed0>
CR2: 0000000000000007

This patch provides a function to purge all timewait sockets related
to a network namespace. The timewait sockets life cycle is not tied with
the network namespace, that means the timewait sockets stay alive while
the network namespace dies. The timewait sockets are for avoiding to
receive a duplicate packet from the network, if the network namespace is
freed, the network stack is removed, so no chance to receive any packets
from the outside world. Furthermore, having a pending destruction timer
on these sockets with a network namespace freed is not safe and will lead
to an oops if the timer callback which try to access data belonging to
the namespace like for example in:
inet_twdr_do_twkill_work
-> NET_INC_STATS_BH(twsk_net(tw), LINUX_MIB_TIMEWAITED);

Purging the timewait sockets at the network namespace destruction will:
 1) speed up memory freeing for the namespace
 2) fix kernel panic on asynchronous timewait destruction

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Acked-by: Denis V. Lunev <den@openvz.org>
Acked-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
16 years agox86: disable static NOPLs on 32 bits
Linus Torvalds [Fri, 5 Sep 2008 16:30:14 +0000 (09:30 -0700)]
x86: disable static NOPLs on 32 bits

On 32-bit, at least the generic nops are fairly reasonable, but the
default nops for 64-bit really look pretty sad, and the P6 nops really do
look better.

So I would suggest perhaps moving the static P6 nop selection into the
CONFIG_X86_64 thing.

The alternative is to just get rid of that static nop selection, and just
have two cases: 32-bit and 64-bit, and just pick obviously safe cases for
them.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
16 years agoxen: fix 2.6.27-rc5 xen balloon driver warnings
Jeremy Fitzhardinge [Mon, 8 Sep 2008 16:54:49 +0000 (09:54 -0700)]
xen: fix 2.6.27-rc5 xen balloon driver warnings

Set the class so it doesn't clash with the normal memory class.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
===================================================================