Commit Graph

766 Commits

Author SHA1 Message Date
Andrew Morton
394e3902c5 [PATCH] more for_each_cpu() conversions
When we stop allocating percpu memory for not-possible CPUs we must not touch
the percpu data for not-possible CPUs at all.  The correct way of doing this
is to test cpu_possible() or to use for_each_cpu().

This patch is a kernel-wide sweep of all instances of NR_CPUS.  I found very
few instances of this bug, if any.  But the patch converts lots of open-coded
test to use the preferred helper macros.

Cc: Mikael Starvik <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Kyle McMartin <kyle@parisc-linux.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Christian Zankel <chris@zankel.net>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Jens Axboe <axboe@suse.de>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23 07:38:17 -08:00
Ingo Molnar
7a7d1cf954 [PATCH] sem2mutex: kprobes
Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23 07:38:12 -08:00
Linus Torvalds
2e6e33bab6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (78 commits)
  [PATCH] powerpc: Add FSL SEC node to documentation
  [PATCH] macintosh: tidy-up driver_register() return values
  [PATCH] powerpc: tidy-up of_register_driver()/driver_register() return values
  [PATCH] powerpc: via-pmu warning fix
  [PATCH] macintosh: cleanup the use of i2c headers
  [PATCH] powerpc: dont allow old RTC to be selected
  [PATCH] powerpc: make powerbook_sleep_grackle static
  [PATCH] powerpc: Fix warning in add_memory
  [PATCH] powerpc: update mailing list addresses
  [PATCH] powerpc: Remove calculation of io hole
  [PATCH] powerpc: iseries: Add bootargs to /chosen
  [PATCH] powerpc: iseries: Add /system-id, /model and /compatible
  [PATCH] powerpc: Add strne2a() to convert a string from EBCDIC to ASCII
  [PATCH] powerpc: iseries: Make more stuff static in platforms/iseries/mf.c
  [PATCH] powerpc: iseries: Remove pointless iSeries_(restart|power_off|halt)
  [PATCH] powerpc: iseries: mf related cleanups
  [PATCH] powerpc: Replace platform_is_lpar() with a firmware feature
  [PATCH] powerpc: trivial: Cleanup whitespace in cputable.h
  [PATCH] powerpc: Remove unused iommu_off logic from pSeries_init_early()
  [PATCH] powerpc: Unconfuse htab_bolt_mapping() callers
  ...
2006-03-22 22:20:46 -08:00
Bjorn Helgaas
6ea671a12f [PATCH] powerpc: tidy-up of_register_driver()/driver_register() return values
Remove the assumption that driver_register() returns the number of devices
bound to the driver.  In fact, it returns zero for success or a negative
error value.

Nobody uses the return value of of_register_driver() anyway.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-23 14:40:54 +11:00
Andrew Morton
2d0eee14b2 [PATCH] powerpc: Fix warning in add_memory
arch/powerpc/mm/mem.c: In function `add_memory':
arch/powerpc/mm/mem.c:128: warning: assignment makes integer from pointer without a cast

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-23 14:39:51 +11:00
David Gibson
42b88befd6 [PATCH] hugepage: is_aligned_hugepage_range() cleanup
Quite a long time back, prepare_hugepage_range() replaced
is_aligned_hugepage_range() as the callback from mm/mmap.c to arch code to
verify if an address range is suitable for a hugepage mapping.
is_aligned_hugepage_range() stuck around, but only to implement
prepare_hugepage_range() on archs which didn't implement their own.

Most archs (everything except ia64 and powerpc) used the same
implementation of is_aligned_hugepage_range().  On powerpc, which
implements its own prepare_hugepage_range(), the custom version was never
used.

In addition, "is_aligned_hugepage_range()" was a bad name, because it
suggests it returns true iff the given range is a good hugepage range,
whereas in fact it returns 0-or-error (so the sense is reversed).

This patch cleans up by abolishing is_aligned_hugepage_range().  Instead
prepare_hugepage_range() is defined directly.  Most archs use the default
version, which simply checks the given region is aligned to the size of a
hugepage.  ia64 and powerpc define custom versions.  The ia64 one simply
checks that the range is in the correct address space region in addition to
being suitably aligned.  The powerpc version (just as previously) checks
for suitable addresses, and if necessary performs low-level MMU frobbing to
set up new areas for use by hugepages.

No libhugetlbfs testsuite regressions on ppc64 (POWER5 LPAR).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: William Lee Irwin III <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-22 07:54:04 -08:00
Nick Piggin
7835e98b2e [PATCH] remove set_page_count() outside mm/
set_page_count usage outside mm/ is limited to setting the refcount to 1.
Remove set_page_count from outside mm/, and replace those users with
init_page_count() and set_page_refcounted().

This allows more debug checking, and tighter control on how code is allowed
to play around with page->_count.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-22 07:54:02 -08:00
Nick Piggin
70dc991d66 [PATCH] remove set_page_count(page, 0) users (outside mm)
A couple of places set_page_count(page, 1) that don't need to.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-22 07:54:01 -08:00
Michael Ellerman
f8642ebee8 [PATCH] powerpc: Remove calculation of io hole
In mm_init_ppc64() we calculate the location of the "IO hole", but then
no one ever looks at the value. So don't bother.

That's actually all mm_init_ppc64() does, so get rid of it too.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:30 +11:00
Michael Ellerman
6c600ad8da [PATCH] powerpc: iseries: Add bootargs to /chosen
Add the command line args to the device tree as /chosen/bootargs.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:27 +11:00
Michael Ellerman
289f1c74a9 [PATCH] powerpc: iseries: Add /system-id, /model and /compatible
Add /system-id, /model and /compatible to the iSeries device tree.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:26 +11:00
Michael Ellerman
584fc6d111 [PATCH] powerpc: Add strne2a() to convert a string from EBCDIC to ASCII
Add strne2a() which converts a string from EBCDIC to ASCII.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:25 +11:00
Michael Ellerman
00611c5cfc [PATCH] powerpc: iseries: Make more stuff static in platforms/iseries/mf.c
Make mf_get_rtc(), mf_get_boot_rtc() and mf_set_rtc() static, cause they can
be. We need to move mf_set_rtc() to avoid a forward declaration.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:23 +11:00
Michael Ellerman
a9ea2101aa [PATCH] powerpc: iseries: Remove pointless iSeries_(restart|power_off|halt)
These routines just call through to the mf routines, so point ppc_md straight
at the mf routines. We need to pass the cmd through to mf_reboot to make it
work, but that seems reasonable.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:22 +11:00
Michael Ellerman
260de22faa [PATCH] powerpc: iseries: mf related cleanups
Some cleanups in the iSeries code.
 - Make mf_display_progress() check mf_initialized rather than the caller.
 - Set mf_initialized in mf_init() rather than in setup.c
 - Then move mf_initialized into mf.c, the only place it's used.
 - Move the mf related logic from iSeries_progress() to mf_display_progress()
 - Use a #define to size the pending_event_prealloc array
 - Use that define in the initialsation loop rather than sizeof jiggery pokery
 - Remove stupid comment(s)
 - Mark stuff static and/or __init

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:20 +11:00
Michael Ellerman
57cfb814f6 [PATCH] powerpc: Replace platform_is_lpar() with a firmware feature
It has been decreed that platform numbers are evil, so as a step in that
direction, replace platform_is_lpar() with a FW_FEATURE_LPAR bit.

Currently FW_FEATURE_LPAR really means i/pSeries LPAR, in the future we might
have to clean that up if we need to be more specific about what LPAR actually
means. But that's another patch ...

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:17 +11:00
Michael Ellerman
415202447d [PATCH] powerpc: Remove unused iommu_off logic from pSeries_init_early()
When iommu_init_early_pSeries() was added, ages ago, we forgot to remove
the code that checks /chosen/linux,iommu-off in pSeries_init_early(). We
do it now in iommu_init_early_pSeries().

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:12 +11:00
Michael Ellerman
caf80e579b [PATCH] powerpc: Unconfuse htab_bolt_mapping() callers
htab_bolt_mapping() takes a vstart and pstart parameter, but all but one of
its callers actually pass it vstart and vstart. Luckily before it passes
paddr (calculated from paddr) to the hpte_insert routines it calls
virt_to_abs() (aka. __pa()) on the address, so there isn't actually a bug.

map_io_page() however does pass pstart properly, so currently it's broken
AFAICT because we're calling __pa(paddr) which will get us something very
large. Presumably no one's calling map_io_page() in the right context.

Anyway, change htab_bolt_mapping() callers to properly pass pstart, and then
use it properly in htab_bolt_mapping(), ie. don't call __pa() on it again.

Booted on p5 LPAR, iSeries and Power3.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:09 +11:00
Nathan Lynch
2b2612272c [PATCH] powerpc numa: Consolidate assignment of cpus to nodes
We can plug the boot cpu into its node independently of whether numa
topology is detected.  And numa_setup_cpu does the right thing for all
cases now, so remove special-casing for non-numa from the cpu hotplug
callback.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:03 +11:00
Nathan Lynch
482ec7c403 [PATCH] powerpc numa: Support sparse online node map
The powerpc numa code unconditionally onlines all nodes from 0 to the
highest node id found, regardless of whether cpus or memory are
present in the nodes.  This wastes 8K per node and complicates some
cpu and memory hotplug situations, such as adding a resource that
doesn't map to one of the nodes discovered at boot.

Set nodes online as resources are scanned.  Fall back to node 0 only
when we're sure this isn't a NUMA machine.

Instead of defaulting to node 0 for cases of hot-adding a resource
which doesn't belong to any initialized node, assign it to the first
online node.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:04:01 +11:00
Nathan Lynch
bc16a75926 [PATCH] powerpc numa: Consolidate handling of Power4 special case
Code to handle Power4's invalid node id (0xffff) is duplicated for cpu
and memory.  Better to handle this case in one place --
of_node_to_nid.  Overall behavior should be unchanged.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:03:57 +11:00
Nathan Lynch
cf950b7af0 [PATCH] powerpc numa: Get rid of "numa domain" terminology
Since we effectively treat the domain ids given to us by firmare as
logical node ids, make this explicit (basically s/numa_domain/nid/).

No functional changes, only variable and function names are modified.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:03:52 +11:00
Nathan Lynch
2e5ce39d67 [PATCH] powerpc numa: Minor cpu hotplug-related cleanups
map_cpu_to_node does not need to be inline, it is never called in a
hot path.

map_cpu_to_node, numa_setup_cpu, and find_cpu_node can be marked
__cpuinit, as they are never used after boot if CONFIG_HOTPLUG_CPU=n.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:03:48 +11:00
Nathan Lynch
bf4b85b0e4 [PATCH] powerpc numa: Minor debugging code changes
Add debug statement for map_cpu_to_node; it's useful for cpu hotplug.

Clarify debug statement about not finding the numa reference points
property.

Don't print a meaningless associativity depth (-1) on non-numa systems.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:03:45 +11:00
Nathan Lynch
c08888cf3c [PATCH] powerpc numa: fix boot_cpuid always assigned to node 0
At boot, the numa code is assigning boot_cpuid to node 0
unconditionally.  Basically, numa_setup_cpu is being stupid about it,
but this is the minimal fix -- just call numa_setup_cpu(boot_cpuid)
later, after all nodes have been set online.

Signed-off-by: Nathan Lynch <nathanl@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-22 15:03:40 +11:00
Paul Mackerras
1d7aac5b3b Merge branch '85xx' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc 2006-03-22 13:46:53 +11:00
Kumar Gala
1a02e59a29 Merge branch 'master' 2006-03-20 11:58:02 -06:00
Kumar Gala
61c5504a0e Merge branch 'master' 2006-03-20 10:53:56 -06:00
Michael Ellerman
2c276603c3 [PATCH] powerpc: Fix bug in bug fix for bug in lmb_alloc()
My patch (d7a5b2ffa1) to always panic if
lmb_alloc() fails is broken because it checks alloc < 0, but should be
checking alloc == 0.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-17 13:28:24 +11:00
Olaf Hering
7e5b59384e [PATCH] powerpc: add a raw dump command to xmon
Dump a stream of rawbytes with a new 'dr' command.
Produces less output and it is simpler to feed the output to scripts.
Also, dr has no dumpsize limits.

Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-17 13:22:33 +11:00
Paul Mackerras
23dd640112 Merge ../linux-2.6 2006-03-17 12:01:19 +11:00
Paul Mackerras
1ae5db3742 powerpc: update defconfigs
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:55:08 +11:00
John Rose
92eb4602eb [PATCH] powerpc: properly configure DDR/P5IOC children devs
The dynamic add path for PCI Host Bridges can fail to configure children
adapters under P5IOC controllers.  It fails to properly fixup bus/device
resources, and it fails to properly enable EEH.  Both of these steps
need to occur before any children devices are enabled in
pci_bus_add_devices().

Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:55:07 +11:00
Olaf Hering
920573bd03 [PATCH] powerpc: remove duplicate EXPORT_SYMBOLS
remove warnings when building a 64bit kernel.
smp_call_function triggers also with 32bit kernel.

WARNING: vmlinux: duplicate symbol 'smp_call_function' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:164:EXPORT_SYMBOL(smp_call_function);
arch/powerpc/kernel/smp.c:300:EXPORT_SYMBOL(smp_call_function);

WARNING: vmlinux: duplicate symbol 'ioremap' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:113:EXPORT_SYMBOL(ioremap);
arch/powerpc/mm/pgtable_64.c:321:EXPORT_SYMBOL(ioremap);

WARNING: vmlinux: duplicate symbol '__ioremap' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:117:EXPORT_SYMBOL(__ioremap);
arch/powerpc/mm/pgtable_64.c:322:EXPORT_SYMBOL(__ioremap);

WARNING: vmlinux: duplicate symbol 'iounmap' previous definition was in vmlinux
arch/powerpc/kernel/ppc_ksyms.c:118:EXPORT_SYMBOL(iounmap);
arch/powerpc/mm/pgtable_64.c:323:EXPORT_SYMBOL(iounmap);

Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:55:05 +11:00
Michael Neuling
0e8ed47912 [PATCH] powerpc: RTC memory corruption
We should be memset'ing the data we are pointing to, not the pointer
itself.  This is in an error path so we probably don't hit it much.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:55:03 +11:00
Benjamin Herrenschmidt
c6cb3b5f36 [PATCH] powerpc: enable NAP only on cpus who support it to avoid memory corruption
This patch fixes incorrect setting of powersave_nap to 1 on all
PowerMacs, potentially causing memory corruption on some models. This
bug was introuced by me during the 32/64 bits merge.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:55:02 +11:00
Michael Ellerman
cd9c99d7e5 [PATCH] powerpc: Clarify wording for CRASH_DUMP Kconfig option
The wording of the CRASH_DUMP Kconfig option is not very clear. It gives you a
kernel that can be used _as_ the kdump kernel, not a kernel that can boot into
a kdump kernel.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:55:00 +11:00
Olaf Hering
e2c552cc89 [PATCH] powerpc/64: enable CONFIG_BLK_DEV_SL82C105
Enable the onboard IDE driver for p610, p615 and p630.
They have the CD connected to this card. All other RS/6000 systems with this
controller have no connectors and dont need this option.

Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:54:59 +11:00
Olaf Hering
eacb1962d4 [PATCH] powerpc: correct cacheflush loop in zImage
Correct the loop for cacheflush. No idea where I copied the code from,
but the original does not work correct. Maybe the flush is not needed.

Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:54:57 +11:00
Paul Mackerras
0a45d4491d powerpc: Fix problem with time going backwards
The recent changes to keep gettimeofday in sync with xtime had the side
effect that it was occasionally possible for the time reported by
gettimeofday to go back by a microsecond.  There were two reasons:
(1) when we recalculated the offsets used by gettimeofday every 2^31
timebase ticks, we lost an accumulated fractional microsecond, and
(2) because the update is done some time after the notional start of
jiffy, if ntp is slowing the clock, it is possible to see time go backwards
when the timebase factor gets reduced.

This fixes it by (a) slowing the gettimeofday clock by about 1us in
2^31 timebase ticks (a factor of less than 1 in 3.7 million), and (b)
adjusting the timebase offsets in the rare case that the gettimeofday
result could possibly go backwards (i.e. when ntp is slowing the clock
and the timer interrupt is late).  In this case the adjustment will
reduce to zero eventually because of (a).

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-16 16:54:55 +11:00
Paul Mackerras
82dfdcae0d powerpc: Disallow lparcfg being a module
The lparcfg code needs several things which are pretty arcane internal
details and which we don't want to export, which means that lparcfg
doesn't work when built as a module.  This makes it a bool instead of
a tristate in the Kconfig so that users can't try to build it as a
module.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-14 11:35:37 +11:00
Paul Mackerras
5164501794 Merge ../linux-2.6 2006-03-09 14:32:05 +11:00
Linus Torvalds
0d514f040a Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge
* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-merge:
  powerpc: Fix various syscall/signal/swapcontext bugs
  [PATCH] powerpc: incorrect rmo_top handling in prom_init
  [PATCH] powerpc: Fix incorrect pud_ERROR() message
  [PATCH] powerpc: Expose SMT and L1 icache snoop userland features
  [PATCH] powerpc: Fix windfarm_pm112 not starting all control loops
  [PATCH] powerpc: Fix old g5 issues with windfarm
  powerpc32: Fix timebase synchronization on 32-bit powermacs
  powerpc: Turn off verbose debug output in powermac platform functions
  powerpc: Fix might-sleep warning in program check exception handler
2006-03-08 18:11:00 -08:00
Paul Mackerras
1bd79336a4 powerpc: Fix various syscall/signal/swapcontext bugs
A careful reading of the recent changes to the system call entry/exit
paths revealed several problems, plus some things that could be
simplified and improved:

* 32-bit wasn't testing the _TIF_NOERROR bit in the syscall fast exit
  path, so it was only doing anything with it once it saw some other
  bit being set.  In other words, the noerror behaviour would apply to
  the next system call where we had to reschedule or deliver a signal,
  which is not necessarily the current system call.

* 32-bit wasn't doing the call to ptrace_notify in the syscall exit
  path when the _TIF_SINGLESTEP bit was set.

* _TIF_RESTOREALL was in both _TIF_USER_WORK_MASK and
  _TIF_PERSYSCALL_MASK, which is odd since _TIF_RESTOREALL is only set
  by system calls.  I took it out of _TIF_USER_WORK_MASK.

* On 64-bit, _TIF_RESTOREALL wasn't causing the non-volatile registers
  to be restored (unless perhaps a signal was delivered or the syscall
  was traced or single-stepped).  Thus the non-volatile registers
  weren't restored on exit from a signal handler.  We probably got
  away with it mostly because signal handlers written in C wouldn't
  alter the non-volatile registers.

* On 32-bit I simplified the code and made it more like 64-bit by
  making the syscall exit path jump to ret_from_except to handle
  preemption and signal delivery.

* 32-bit was calling do_signal unnecessarily when _TIF_RESTOREALL was
  set - but I think because of that 32-bit was actually restoring the
  non-volatile registers on exit from a signal handler.

* I changed the order of enabling interrupts and saving the
  non-volatile registers before calling do_syscall_trace_leave; now we
  enable interrupts first.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-08 13:24:22 +11:00
Linus Torvalds
c05b477045 ppc64: make sure to align stack pointer to 16 bytes at boot
yaboot is scrogged and calls us with an invalid stack alignment,
it seems.

Thanks to David Woodhouse to pointing me to the problem.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-04 15:00:45 -08:00
Benjamin Herrenschmidt
ab1b55e21f [PATCH] powerpc: incorrect rmo_top handling in prom_init
On Thu, 2006-03-02 at 19:55 +0100, Olaf Hering wrote:

> My iBook1 has 2 memory regions in reg. Depending on how I boot it
> (vmlinux+initrd) or zImage.initrd, it will not boot with current Linus
> tree.
> rmo_top should be 160MB instead of 32MB.

On logically-partitioned machines the first element of the reg
property in the memory node is defined to be the "RMO" region,
i.e. the memory that the processor can access in real mode.  On other
machines the first element has no special meaning, so only take it to
be the RMO region on LPAR machines.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-03 22:01:05 +11:00
Benjamin Herrenschmidt
aa5cb02143 [PATCH] powerpc: Expose SMT and L1 icache snoop userland features
This patch makes userland aware of the icache snoop capability of the
POWER5 (and possibly others in the future) and of SMT capabilities.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-03 22:00:23 +11:00
Paul Mackerras
0c2aca88bd powerpc32: Fix timebase synchronization on 32-bit powermacs
The variable `timebase' used to transfer the current timebase value
from one cpu to the other in smp_core99_give/take_timebase was only
an unsigned long, i.e. 32 bits on 32-bit machines.  It needs to be
64 bits.  This makes it a u64, and fixes the issue reported by Kyle
Moffett, that the two cpus see wildly different values for the time
of day.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-03 21:31:25 +11:00
Paul Mackerras
76a0ee3d16 powerpc: Turn off verbose debug output in powermac platform functions
This is along the lines suggested by Chris Lumens but goes further
in that it leaves the DEBUG symbol undefined, making the DBG macro
empty.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-03 20:50:29 +11:00
Paul Mackerras
cd8a5673e9 powerpc: Fix might-sleep warning in program check exception handler
On 32-bit, the exception prolog for the program check exception doesn't
enable interrupts early on.  If it is an illegal instruction exception,
we read the instruction in order to emulate certain instructions, and
the get_user of the instruction triggers a WARN_ON since interrupts
are still disabled.  This adds a local_irq_enable() to enable
interrupts before reading the instruction.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-03-03 17:11:40 +11:00