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On some smp sysfs store attributes get_online_cpus() may block on
cpu_hotplug.lock, but we hold already smp_cpu_state_mutex. Since the
locking order on cpu hotplug via arch_update_cpu_topology is inverse
this might lead to deadlocks.
So make sure locking order is always the same.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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This is where it should be and we can get rid of some externs
and a static inline function.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Commit edd8ce67436851a62f99f1d9707b40ea6a8e5323 (Use extended crashkernel
command line on ppc64), changed the logic in reserve_crashkernel()
which deals with the crashkernel= command line option.
This introduced a bug in the case when there is no crashkernel= option,
or it is incorrect. We would fall through and calculate the crash_size
based on the existing values in crashk_res. If both start and end are 0,
the default, we calculate the crash_size as 1 byte - which is wrong.
Rework the logic so that we use crashk_res, regardless of whether it's
set by the command line or via the device tree (see prom.c). Then check
if we have an empty range (end == start), and if so make sure to set
both end and start to zero (this is checked in machine_kexec_64.c). Then
we calculate the crash_size once we know we have a non-zero range.
Finally we always want to warn the user if they specify a base != 32MB,
so remove the special case for that in the command line parsing case.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The current_thread_info() macro, used by preempt_count(), assumes the
base address and size of the stack are THREAD_SIZE aligned.
The emergency stack currently isn't either of these things, which
could potentially cause problems anytime we're running on the
emergency stack. That includes when we detect a bad kernel stack
pointer, and also during early_setup_secondary().
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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The sputrace module contained a trace entry for spu_acquire_saved, but
this marker was not placed anywhere. Fix this by adding a marker to the
routine.
Signed-off-by: Julio M. Merino Vidal <jmerino@ac.upc.edu>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Fix a typo in the marker for the find_victim function, which prevented
it from being traced. It previously read find_vitim.
Signed-off-by: Julio M. Merino Vidal <jmerino@ac.upc.edu>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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The sputrace module contained a reference to a marker for
destroy_spu_context, but this marker did not appear in the code. Fix
this by adding a marker in the function.
Signed-off-by: Julio M. Merino Vidal <jmerino@ac.upc.edu>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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The markers facility defines the marker parameters to be of the form
'name %format'. Add parameter names to sputrace, to specify the context
and %spu paramerters, instead of just specifying the '%format' part.
Signed-off-by: Julio M. Merino Vidal <jmerino@ac.upc.edu>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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There are userspace instrumentation tools that need to monitor spu
context switches. This patch adds a new file called 'switch_log' to
each spufs context directory that can be used to monitor the context
switches.
Context switch in/out and exit from spu_run are monitored after the
file was first opened and can be read from it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Board-specific defconfigs based on current mpc5200_defconfig, archival
lite5200_defconfig, and [cm5200|motionpro|tqm5200]_defconfig from the
linux-2.6-denx tree. Kernels build using these defconfigs were verified
to boot with root filesystem mounted over NFS on Motion-PRO, TQM5200
and Lite5200B boards. CM5200 target was not tested due to hardware
unavailability.
Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Add board support for the Phytec pcm030 mpc5200b based board. It
does not need any platform specific fixups and as such is handled
as a mpc5200 simple platform.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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This patch adds gpiolib support for mpc5200 SOCs.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Add a set_type function for external (GPIO) interrupts.
Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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Remove dulicated include file <asm/timer.h> in arch/sparc64/kernel/smp.c.
Signed-off-by: Huang Weiyi <hwy@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Change RapidIO doorbell source and target ID field to 16-bit for
support large system size, which max rio devid is 65535.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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connections
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This adds properties describing the RapidIO controller to the
device-tree source for the MPC8641HPCN board.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The RapidIO system size will auto probe in RIO setup. The route table
and rionet_active in rionet.c are changed to be allocated dynamically
according to the size of the system.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This initializes the RapidIO controller driver using addresses and
interrupt numbers obtained from the firmware device tree, rather than
using hardcoded constants.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The original RapidIO driver suppose there is only one mpc85xx RIO controller
in system. So, some data structures are defined as mpc85xx_rio global, such
as 'regs_win', 'dbell_ring', 'msg_tx_ring'. Now, I changed them to mport's
private members. And you can define multi RIO OF-nodes in dts file for multi
RapidIO controller in one processor, such as PCI/PCI-Ex host controllers in
Freescale's silicon. And the mport operation function declaration should be
changed to know which RapidIO controller is target.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The driver is suitable for the Freescale MPC8641 processor as well as
85xx processors, so this changes the mpc85xx prefix to fsl.
Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Current limitations:
1) On SMP single stepping has some fundamental issues,
shared with other sw single-step architectures such
as mips and arm.
2) On 32-bit sparc we don't support SMP kgdb yet. That
requires some reworking of the IPI mechanisms and
infrastructure on that platform.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Completely unused, and it just makes the SMP message
passing code on 32-bit sparc look more complex than
it is.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Provide walk_memory_resource() for 64-bit powerpc. PowerPC maintains
logical memory region mapping in the lmb.memory structure. Walk
through these structures and do the callbacks for the contiguous
chunks.
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The powerpc kernel maintains information about logical memory blocks
in the lmb.memory structure, which is initialized and updated at boot
time, but not when memory is added or removed while the kernel is
running.
This adds a hotplug memory notifier which updates lmb.memory when
memory is added or removed. This information is useful for eHEA
driver to find out the memory layout and holes.
NOTE: No special locking is needed for lmb_add() and lmb_remove().
Calls to these are serialized by caller. (pSeries_reconfig_chain).
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Hotplug memory remove notifier for 64-bit powerpc. This gets invoked
by writing to /proc/ppc64/ofdt the string "remove_node " followed by
the firmware device tree pathname of the node that needs to be removed.
In response, this adjusts the sections and removes sysfs entries by
calling __remove_pages(). Then it calls arch-specific code to get rid
of the hardware MMU mappings for the section of memory.
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Reviewed-by: Michael Ellerman <michael@ellerman.id.au>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This implements a new driver named windfarm_pm121, which drives the
fans on PowerMac 12,1 machines : iMac G5 iSight (rev C) 17" and
20". It's based on the windfarm_pm81 driver from Benjamin
Herrenschmidt.
This includes fixes from David Woodhouse correcting the names of some
of the sensors.
Signed-off-by: Étienne Bersac <bersace@gmail.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Kamalesh Babulal (kamalesh@linux.vnet.ibm.com) reports that CONFIG_NVRAM=m
is valid in terms of Kconfig but fails to build with:
Building modules, stage 2.
MODPOST 1401 modules
ERROR: "pmac_newworld" [arch/powerpc/platforms/powermac/nvram.ko] undefined!
ERROR: "__alloc_bootmem" [arch/powerpc/platforms/powermac/nvram.ko] undefined!
make[1]: *** [__modpost] Error
The arch/powerpc/platforms/powermac/nvram.c code really needs to be
builtin, but as its compilation is dependent on a generic Kconfig
symbol we force nvram.c to be builtin if CONFIG_NVRAM is 'y' or 'm'.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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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 <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This adds a system call on 64-bit platforms for switching between
little-endian and big-endian modes that is much faster than doing a
prctl call. This system call is handled as a special case right at
the start of the system call entry code, and because it is a special
case, it uses a system call number which is out of the range of
normal system calls, namely 0x1ebe.
Measurements with lmbench on a 4.2GHz POWER6 showed no measurable
change in the speed of normal system calls with this patch.
Switching endianness with this new system call takes around 60ns on a
4.2GHz POWER6, compared with around 300ns to switch endian mode with a
prctl. This can provide a significant performance advantage for
emulators for little-endian architectures that want to switch between
big-endian and little-endian mode frequently, e.g. because they are
generating instructions sequences on the fly and they want to run
those sequences in little-endian mode.
The other thing about this system call is that it doesn't clobber as
many registers as a normal system call. It only clobbers r12.
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Adds a driver for built-in IXP4xx Ethernet ports.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6: (35 commits)
siimage: coding style cleanup (take 2)
ide-cd: clean up cdrom_analyze_sense_data()
ide-cd: fix test unsigned var < 0
ide: add TSSTcorp CDDVDW SH-S202H to ivb_list[]
piix: add Asus Eee 701 controller to short cable list
ARM: always select HAVE_IDE
remove the broken ETRAX_IDE driver
ide: remove ->dma_prdtable field from ide_hwif_t
ide: remove ->dma_vendor{1,3} fields from ide_hwif_t
scc_pata: add ->dma_host_set and ->dma_start methods
ide: skip "VLB sync" if host uses MMIO
ide: add ide_pad_transfer() helper
ide: remove ->INW and ->OUTW methods
ide: use IDE I/O helpers directly in ide_tf_{load,read}()
ns87415: add ->tf_read method
scc_pata: add ->tf_{load,read} methods
ide-h8300: add ->tf_{load,read} methods
ide-cris: add ->tf_{load,read} methods
ide: add ->tf_load and ->tf_read methods
ide: move ide_tf_{load,read} to ide-iops.c
...
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It's plain wrong for PCMCIA to select HAVE_IDE that implies e.g. the
availability of an asm/ide.h
It turns out this was done for ARM, and we can simply always select
HAVE_IDE on ARM instead of manually tracking which platforms might
possible have an IDE controller directly or indirectly.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Cc: Russell King <rmk+lkml@arm.linux.org.uk>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
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The 64-bit vDSO image is in a special ".vdso" section for no reason
I can determine. Furthermore, the location of the vdso_end symbol
includes some wrongly-calculated padding space in the image, which
is then (correctly) rounded to page size, resulting in an extra page
of zeros in the image mapped in to user processes.
This changes it to put the vdso.so image into normal initdata as we
have always done for the 32-bit vDSO images. The extra padding is
gone, so the user VMA is one page instead of two. The image that
was already copied around at boot time is now in initdata, so we
recover that wasted space after boot.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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back.
We checked the hardware freq with OS cached freq value in get_cur_freqon_cpu().
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dave Jones <davej@redhat.com>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (45 commits)
[MIPS] Pb1200/DBAu1200: move platform code to its proper place
[MIPS] Fix handling of trap and breakpoint instructions
[MIPS] Pb1200: do register SMC 91C111
[MIPS] DBAu1200: fix bad SMC 91C111 resource size
[NET] Kconfig: Rename MIKROTIK_RB500 -> MIKROTIK_RB532
[MIPS] IP27: Fix build bug due to missing include
[MIPS] Fix some sparse warnings on traps.c and irq-msc01.c
[MIPS] cevt-gt641xx: Kill unnecessary include
[MIPS] DS1287: Add clockevent driver
[MIPS] add DECstation I/O ASIC clocksource
[MIPS] rbtx4938: minor cleanup
[MIPS] Alchemy: kill unused PCI_IRQ_TABLE_LOOKUP macro
[MIPS] rbtx4938: misc cleanups
[MIPS] jmr3927: use generic txx9 gpio
[MIPS] rbhma4500: use generic txx9 gpio
[MIPS] generic txx9 gpio support
[MIPS] make fallback gpio.h gpiolib-friendly
[MIPS] unexport null_perf_irq() and make it static
[MIPS] unexport rtc_mips_set_time()
[MIPS] unexport copy_from_user_page()
...
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This bug was introduced in the 2.6.24 i386/x86_64 tree merge, where
MSI-X vector allocation will eventually fail. The cause is the new
bit array tracking used vectors is not getting cleared properly on
IRQ destruction on the 32-bit APIC code.
This can be seen easily using the ixgbe 10 GbE driver on multi-core
systems by simply loading and unloading the driver a few times.
Depending on the number of available vectors on the host system, the
MSI-X allocation will eventually fail, and the driver will only be
able to use legacy interrupts.
I am generating the same patch for both stable trees for 2.6.24 and
2.6.25.
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* EXTRA_CFLAGS do not apply for *.S
* don't bother with symlinks to ../lib/mem*.S, just add ../lib/mem*.o
to object list
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc: video drivers: add facility level
sparc: tcx.c make tcx_init and tcx_exit static
sparc: ffb.c make ffb_init and ffb_exit static
sparc: cg14.c make cg14_init and cg15_exit static
sparc: bw2.c fix bw2_exit
sparc64: Fix accidental syscall restart on child return from clone/fork/vfork.
sparc64: Clean up handling of pt_regs trap type encoding.
sparc: Remove old style signal frame support.
sparc64: Kill bogus RT_ALIGNEDSZ macro from signal.c
sparc: sunzilog.c remove unused argument
sparc: fix drivers/video/tcx.c warning
sparc64: Kill unused local ISA bus layer.
input: Rewrite sparcspkr device probing.
sparc64: Do not ignore 'pmu' device ranges.
sparc64: Kill ISA_FLOPPY_WORKS code.
sparc64: Kill CONFIG_SPARC32_COMPAT
sparc64: Cleanups and corrections for arch/sparc64/Kconfig
sparc64: Fix wedged irq regression.
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Since both the IDE interface and SMC 91C111 Ethernet chip are on-board
devices, not SOC devices, move the platform device registration form the
common to the board specific code.
While at it, remove semicolon (which didn't break compilation only by
chance) from the AU1XXX_ATA_DDMA_REQ macro and do some renaming:
- change 'au1200_ide0_' variable name prefix to the mere 'ide_';
- change 'smc91x_' variable name prefix to 'smc91c111_' since that's the
name of the chip used on the boards;
- drop 'AU1XXX_' prefix from the names of macros describing IDE and Ethernet
on-board devices;
- change 'SMC91111_' to 'SMC91C111_', change 'IRQ' to 'INT' in the names of
the macros describing the Ethernet chip for consistency with the IDE
macros;
- change 'ATA_' to 'IDE_' and 'OFFSET' to 'SHIFT' (since this value is
indeed a shift count) in the names of the macros describing the IDE
interface.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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With fixes and cleanups from Atsushi Nemoto (anemo@mba.ocn.ne.jp).
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Pb1200 does have SMC 91C111 Ethernet chip on board but the platform code
did not register it, so one couldn't mount NFS...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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