Commit Graph

92 Commits

Author SHA1 Message Date
Peter Zijlstra 58dfe883d3 lockdep: annotate kprobes irq fiddling
kprobes disables irqs for jprobes, but does not tell lockdep about it.

This resolves this warning during an allyesconfig bzImage bootup test:

 [  423.670337] WARNING: at kernel/lockdep.c:2658 check_flags()
 [  423.670341]  [<c0107f01>] show_trace_log_lvl+0x19/0x2e
 [  423.670348]  [<c0107ffa>] show_trace+0x12/0x14
 [  423.670350]  [<c0108010>] dump_stack+0x14/0x16
 [  423.670353]  [<c015249d>] check_flags+0x95/0x142
 [  423.670357]  [<c0155576>] lock_acquire+0x52/0xb8
 [  423.670360]  [<c1313c90>] _spin_lock+0x2e/0x58
 [  423.670365]  [<c11b72f9>] jtcp_rcv_established+0x6e/0x189
 [  423.670369]  [<c11810da>] tcp_v4_do_rcv+0x30b/0x620
 [  423.670373]  [<c1181c8c>] tcp_v4_rcv+0x89d/0x8fa
 [  423.670376]  [<c1167dba>] ip_local_deliver+0x17d/0x225
 [  423.670380]  [<c11682f5>] ip_rcv+0x493/0x4ce
 [  423.670383]  [<c11177ef>] netif_receive_skb+0x347/0x365
 [  423.670388]  [<c07b6e7b>] nv_napi_poll+0x501/0x6c3
 [  423.670393]  [<c1115b1a>] net_rx_action+0xa3/0x1b6
 [  423.670396]  [<c013bdee>] __do_softirq+0x76/0xfb
 [  423.670400]  [<c0109189>] do_softirq+0x75/0xf3

[ akpm: checkpatch.pl cleanups ]

Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2007-10-11 22:25:25 +02:00
Peter Zijlstra 10cd706d18 lockdep: x86_64: connect the sysexit hook
Run the lockdep_sys_exit hook after all other C code on the syscall
return path.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-11 22:11:12 +02:00
Peter Zijlstra c7e872e7da lockdep: i386: connect the sysexit hook
Run the lockdep_sys_exit hook after all other C code on the syscall
return path.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2007-10-11 22:11:12 +02:00
Thomas Gleixner 89039b37be x86: force timer broadcast on late AMD C1E detection
The 64bit SMP bootup is slightly different to the 32bit one. It enables
the boot CPU local APIC timer before all CPUs are brought up. Some AMD C1E
systems have the C1E feature flag only set in the secondary CPU. Due to
the early enable of the boot CPU local APIC timer the APIC timer is
registered as a fully functional device. When we detect the wreckage during
the bringup of the secondary CPU, we need to force the boot CPU into
broadcast mode. 

Check the C1E caused APIC timer disable, when the secondary APIC timer is
initialized. If the boot CPU APIC timer was registered as a functional
clock event device, then fix this up and utilize the
CLOCK_EVT_NOTIFY_BROADCAST_FORCE mechanism to force the already
registered boot CPU APIC timer into broadcast mode.

Tested by force injecting the failure mode.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-14 22:57:45 +02:00
Thomas Gleixner 3ac508be76 x86: move local APIC timer init to the end of start_secondary()
Preparatory patch for the AMD C1E wreckage fixup.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-14 22:57:45 +02:00
Dave Jones b097976e8d x86: fix missing include for vsyscall
> Maybe I just picked a bad time to try, but...
 > 
 > arch/x86/kernel/alternative.c: In function 'apply_alternatives':
 > arch/x86/kernel/alternative.c:191: error: 'VSYSCALL_START' undeclared (first use in this function)
 > arch/x86/kernel/alternative.c:191: error: (Each undeclared identifier is reported only once
 > arch/x86/kernel/alternative.c:191: error: for each function it appears in.)
 > arch/x86/kernel/alternative.c:191: error: 'VSYSCALL_END' undeclared (first use in this function)
 > make[1]: *** [arch/x86/kernel/alternative.o] Error 1
 > make: *** [arch/x86/kernel] Error 2

Try this.

Include missing header for vsyscall.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-14 22:57:45 +02:00
Al Viro 64b33619a3 long vs. unsigned long - low-hanging fruits in drivers
deal with signedness of the stuff passed to set_bit() et.al.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-14 12:41:51 -07:00
Dave Jones 835c34a168 Delete filenames in comments.
Since the x86 merge, lots of files that referenced their own filenames
are no longer correct.  Rather than keep them up to date, just delete
them, as they add no real value.

Additionally:
- fix up comment formatting in scx200_32.c
- Remove a credit from myself in setup_64.c from a time when we had no SCM
- remove longwinded history from tsc_32.c which can be figured out from
  git.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-13 10:01:23 -07:00
Jeff Garzik 752097cec5 x86/pci/acpi: fix DMI const-ification fallout
Fix DMI const-ification fallout that appeared when merging subsystem
trees.

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-12 20:41:44 -07:00
Nick Piggin df1bdc0667 x86: fence oostores on 64-bit
movnt* instructions are not strongly ordered with respect to other stores,
so if we are to assume stores are strongly ordered in the rest of the 64
bit code, we must fence these off (see similar examples in 32 bit code).

[ The AMD memory ordering document seems to say that nontemporal stores can
  also pass earlier regular stores, so maybe we need sfences _before_
  movnt* everywhere too? ]

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-12 18:41:21 -07:00
Linus Torvalds 6a84258e5f Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (37 commits)
  PCI: merge almost all of pci_32.h and pci_64.h together
  PCI: X86: Introduce and enable PCI domain support
  PCI: Add 'nodomains' boot option, and pci_domains_supported global
  PCI: modify PCI bridge control ISA flag for clarity
  PCI: use _CRS for PCI resource allocation
  PCI: avoid P2P prefetch window for expansion ROMs
  PCI: skip ISA ioresource alignment on some systems
  PCI: remove transparent bridge sizing
  pci: write file size to inode on proc bus file write
  pci: use size stored in proc_dir_entry for proc bus files
  pci: implement "pci=noaer"
  PCI: fix IDE legacy mode resources
  MSI: Use correct data offset for 32-bit MSI in read_msi_msg()
  PCI: Fix incorrect argument order to list_add_tail() in PCI dynamic ID code
  PCI: i386: Compaq EVO N800c needs PCI bus renumbering
  PCI: Remove no longer correct documentation regarding MSI vector assignment
  PCI: re-enable onboard sound on "MSI K8T Neo2-FIR"
  PCI: quirk_vt82c586_acpi: Omit reading PCI revision ID
  PCI: quirk amd_8131_mmrbc: Omit reading pci revision ID
  cpqphp: Use PCI_CLASS_REVISION instead of PCI_REVISION_ID for read
  ...
2007-10-12 15:50:23 -07:00
Linus Torvalds 4d5709a7b7 Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Don't take semaphore in cpufreq_quick_get()
  [CPUFREQ] Support different families in fid/did to frequency conversion
  [CPUFREQ] cpufreq_stats: misc cpuinit section annotations
  [CPUFREQ] implement !CONFIG_CPU_FREQ stub for  cpufreq_unregister_notifier()
  [CPUFREQ] mark hotplug notifier callback as __cpuinit
  [CPUFREQ] Only check for transition latency on problematic governors (kconfig fix)
  [CPUFREQ] allow ondemand and conservative cpufreq governors to be used as default
  [CPUFREQ] move policy's governor initialisation out of low-level drivers into cpufreq core
  [CPUFREQ] Longhaul - Add support for PM133 northbridge
  [CPUFREQ] x86: use num_online_nodes to get physical cpus numbers for
2007-10-12 15:42:01 -07:00
Jeff Garzik a79e4198d1 PCI: X86: Introduce and enable PCI domain support
* fix bug in pci_read() and pci_write() which prevented PCI domain
  support from working (hardcoded domain 0).

* unconditionally enable CONFIG_PCI_DOMAINS

* implement pci_domain_nr() and pci_proc_domain(), as required of
  all arches when CONFIG_PCI_DOMAINS is enabled.

* store domain in struct pci_sysdata, as assigned by ACPI

* support "pci=nodomains"

Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:19 -07:00
Gary Hade 11949255d9 PCI: modify PCI bridge control ISA flag for clarity
Modify PCI Bridge Control ISA flag for clarity

This patch changes PCI_BRIDGE_CTL_NO_ISA to PCI_BRIDGE_CTL_ISA
and modifies it's clarifying comment and locations where used.
The change reduces the chance of future confusion since it makes
the set/unset meaning of the bit the same in both the bridge
control register and bridge_ctl field of the pci_bus struct.

Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Acked-by: Linas Vepstas <linas@austin.ibm.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:18 -07:00
Gary Hade 62f420f828 PCI: use _CRS for PCI resource allocation
Use _CRS for PCI resource allocation

This patch resolves an issue where incorrect PCI memory and i/o ranges
are being assigned to hotplugged PCI devices on some IBM systems.  The
resource mis-allocation not only makes the PCI device unuseable but
often makes the entire system unuseable due to resulting machine checks.

The hotplug capable PCI slots on the affected systems are not located
under a standard P2P bridge but are instead located under PCI root
bridges or subtractive decode P2P bridges.  For example, the IBM x3850
contains 2 hotplug capable PCI-X slots and 4 hotplug capable PCIe slots
with the PCI-X slots each located under a PCI root bridge and the PCIe
slots each located under a subtractive decode P2P bridge.

The current i386/x86_64 PCI resource allocation code does not use _CRS
returned resource information.  No other resource information source is
available for slots that are not below a standard P2P bridge so
incorrect ranges are being allocated from e820 hole causing the bad
result.

This patch causes the kernel to use _CRS returned resource info.  It is
roughly based on a change provided by Matthew Wilcox for the ia64 kernel
in 2005.  Due to possible buggy BIOS factor and possible yet to be
discovered kernel issues the function is disabled by default and can be
enabled with pci=use_crs.

Signed-off-by: Gary Hade <gary.hade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:18 -07:00
Gary Hade 036fff4cf7 PCI: skip ISA ioresource alignment on some systems
Skip ISA ioresource alignment on some systems

To conserve limited PCI i/o resource on some IBM multi-node systems, the
BIOS allocates (via _CRS) and expects the kernel to use addresses in
ranges currently excluded by pcibios_align_resource() [i386/pci/i386.c].
This change allows the kernel to use the currently excluded address
ranges on the IBM x3800, x3850, and x3950.

Signed-off-by: Gary Hade <gary.hade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:18 -07:00
Juha Laiho 5b1ea82fa2 PCI: i386: Compaq EVO N800c needs PCI bus renumbering
Force PCI bus renumbering for Compaq EVO N800c laptop, in order to get
the cardbus slot recognised.

Signed-off-by: Juha Laiho <Juha.Laiho@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:16 -07:00
Johannes Goecke 346ca04d05 PCI: re-enable onboard sound on "MSI K8T Neo2-FIR"
On the "MSI K8T Neo2-FIR" board the BIOS disables the onboard
soundcard, if a second PCI soundcard is present.

This patch sets the korrect register bit to enable the onboard sound.

Removed old code in /drivers/pci/quirks.c that only checks for the
PCI-ID and fires on any Board with VIA 8237.

New code in /arch/i386/pci/fixup.c checks the DMI-tables and only runs
on the specific board.


Signed-off-by: Johannes Goecke <goecke@upb.de>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:16 -07:00
Thomas Backlund b205f6b267 i386: add support for picopower irq router
Add support for PicoPower PT86C523 IRQ router to be used with the in-kernel
yenta driver for CardBus.  With this patch cardbus works on e.g.  Dell
Latitude XPi P150CD.

Initial patch for kernel 2.4 series by Sune Mølgaard
http://molgaard.org/code/linux-2.4.31-picopower.patch

Ported to 2.6.20 by Chmouel Boudjnah (http://www.chmouel.com)

Testing and confirmation that it works by Austin Acton

Cleaned up a little for inclusion in a 2.6.21-rc7 based kernel.

Added some more cleanups according to CodingStyle, as noted by
Randy Dunlap on LKML.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: Thomas Backlund <tmb@mandriva.org>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:15 -07:00
Denis V. Lunev 3d034aecd8 PCI: pci_get_device call from interrupt in reboot fixups
The following calltrace is possible now:
 handle_sysrq
   machine_emergency_restart
     mach_reboot_fixups
       pci_get_device
         pci_get_subsys
	   down_read
The patch skips reboot fixup if called from sysrq-B code.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:15 -07:00
David Brownell aa24886e37 dma_free_coherent() needs irqs enabled (sigh)
On at least ARM (and I'm told MIPS too) dma_free_coherent() has a newish
call context requirement: unlike its dma_alloc_coherent() sibling, it may
not be called with IRQs disabled.  (This was new behavior on ARM as of late
2005, caused by ARM SMP updates.) This little surprise can be annoyingly
driver-visible.

Since it looks like that restriction won't be removed, this patch changes
the definition of the API to include that requirement.  Also, to help catch
nonportable drivers, it updates the x86 and swiotlb versions to include the
relevant warnings.  (I already observed that it trips on the
bus_reset_tasklet of the new firewire_ohci driver.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: David Miller <davem@davemloft.net>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-10-12 15:03:15 -07:00
Venki Pallipadi ed6fb174ee x86: HPET add another ICH7 PCI id
Add another PCI ID for ICH7 force hpet.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:24 +02:00
Venki Pallipadi 32a2da64c2 x86: HPET force enable ICH5 suspend/resume fix
A bugfix in ich5 hpet force detect which caused resumes to fail.  Thanks to
Udo A Steinberg for reporting the problem.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:24 +02:00
Venki Pallipadi bfe0c1cc64 x86: HPET force enable for ICH5
force_enable hpet for ICH5.

[ Build fixes from Andrew Morton ]

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:24 +02:00
Venki Pallipadi 59c69f2a51 x86: HPET try to activate force detected hpet
Enable HPET later during boot, after the force detect in PCI quirks.  Also add
a call to repeat the force enabling at resume time.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:23 +02:00
Venki Pallipadi d54bd57d65 x86: HPET force enable o ICH7 and later
Force detect and/or enable HPET on ICH chipsets.  This patch just handles the
detection part and following patches use this information.  Adds a function to
repeat the force enabling during resume time.

Using HPET this way, instead of PIT increases the time CPUs can reside in
C-state when system is totally idle.  On my test system with Core 2 Duo,
average C-state residency goes up from ~20mS to ~80mS.

[ Build fixed from Andrew Morton ]

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:23 +02:00
Venki Pallipadi 610bf2f143 x86: HPET restructure hpet code for hpet force enable
Restructure and rename legacy replacement mode HPET timer support.  Just the
code structural changes and should be zero functionality change.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:23 +02:00
Chris Wright 31c435d75e i386/x8664: cleanup the shared hpet code
Remove hpet_readl/writel from vsyscall.h, where it does not belong
anyway. Use the hpet code itself.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:23 +02:00
Chris Wright bc1d99c1de x86_64: cleanup apic.c after clock events switch
Make variables static.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:23 +02:00
Thomas Gleixner 9f75e9b74a x86_64: remove now unused code
Remove the unused code after the switch to clock events.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:23 +02:00
Thomas Gleixner 2f0798a3b1 x86: unify timex.h variants
Combine the timex.h variants and move the TSC related code into tsc.h.
Move the set_cyc2ns_scale() call into the tsc calibraction code, where
it belongs.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:23 +02:00
Thomas Gleixner 5d5a2989b7 x86: kill 8253pit.h
Useless header file with 32 bit and 64 bit variants. Move the
single useful line to the place where it is used.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:23 +02:00
Thomas Gleixner fb79d22e1d x86: disable apic timer for AMD C1E enabled CPUs
AMDs C1E enabled CPUs stop the local apic timer, when both cores are
idle. This is a hardware feature which breaks highres/dynticks.
Add the same quirk as we have for 32 bit already.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Thomas Gleixner 4e77ae3e10 x86: Fix irq0 / local apic timer accounting
The clock events merge introduced a change to the nmi watchdog code to
handle the not longer increasing local apic timer count in the
broadcast mode. This is fine for UP, but on SMP it pampers over a
stuck CPU which is not handling the broadcast interrupt due to the
unconditional sum up of local apic timer count and irq0 count.

To cover all cases we need to keep track on which CPU irq0 is
handled. In theory this is CPU#0 due to the explicit disabling of irq
balancing for irq0, but there are systems which ignore this on the
hardware level. The per cpu irq0 accounting allows us to remove the
irq0 to CPU0 binding as well.

Add a per cpu counter for irq0 and evaluate this instead of the global
irq0 count in the nmi watchdog code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Thomas Gleixner b8ce335906 x86_64: convert to clock events
Finally switch to the clockevents code. Share code with i386 for
hpet and PIT.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Thomas Gleixner ba7eda4c60 x86_64: Add (not yet used) clock event functions
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Chris Wright 0229068334 x86_64: prepare idle loop for dynamic ticks
Add tick_nohz_{stop,restart}_sched_tick to idle loop in prepartion for turning
on dynticks.  These are just noops until NO_HZ is enabled.

Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Thomas Gleixner c4d58cbd15 x86_64: remove nested irq disables
setup_APIC_timer disables interrupts anyway. So no need to do the same
in setup_boot_APIC_clock and setup_secondary_APIC_clock. Disable
interrupts explicit in the calibration code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Thomas Gleixner abc63fcd3c x86_64: apic change setup_APIC_timer calling convention
setup_APIC_timer takes the file global calibration result as an argument.
Remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:07 +02:00
Thomas Gleixner b58eb00df7 x86_64: Remove APIC_DIVISOR
APIC_DIVISOR is rather useless. It makes the calibration result more
accurate in the first place, but we discard this later when we write
the value to the APIC timer by dividing the calibration value by
APIC_DIVISOR.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner d03030e917 x86_64: Move apic calibration code around
Let the calibration code fill in calibration_result directly and
move the variable on top of the file.

Fixup a printk w/o log level while at it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner 500ff08b76 x86_64: remove pit synchronization
The APIC timer setup code synchronizes the local APIC timer to the
PIT/HPET. This is pointless as the PIT and the local APIC timer
frequency are not correlated and the APIC timer calibration can never
be accurate enough to avoid that the local APIC timer and the PIT/HPET
drift apart.

Simply remove it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner 801740971a x86_64: prepare apic code for clock events
Change __setup_APIC_LVTT so it takes the arguments which are necessary
for the later clock events switch.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Yinghai Lu 7ffeeb1e03 x86: remove never used apic_mapped
[ tglx: arch/x86 adaptation ]

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:06 +02:00
Thomas Gleixner 0190dae54d i386: prepare sharing the PIT code
PIT clock events work already and the PIT handling is the same for
i386 and x86_64. x86_64 does not support PIT as a clock source, so
disable the PIT clocksource for x86_64.

Use the i386 i8253.h include file for x86_64 as well to share the
exports and the PIT constants.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner f5e0e93faf i386: prepare sharing the PIT code
PIT clock events work already and the PIT handling is the same for
i386 and x86_64. x86_64 does not support PIT as a clock source, so
disable the PIT clocksource for x86_64.

Prepare i8253.h to be shared with x8664

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner 28769149c2 i386: prepare sharing the hpet code with x86_64
Add the x8664 specific bits (mapping) to share the hpet code later.

Move the reserve_platform_timer call to late init. This is necessary
for x86_64, as hpet enable() is called before memory is setup. i386
calls it in late_time_init, but it does not hurt to do it later for
both.

Pull in the x8664 hpet disable command line option as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner 06a24dec10 i386: prepare sharing the hpet code with x86_64
The hpet implementations of i386 and x8664 has been mostly the same
before the clock events conversion of i386. The clock events
conversion of i386 hpet is already done. So it makes sense to share
the code for the x86_64 clock events conversion.

Abstract out the mapping functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Thomas Gleixner d371698efd x86_64: Consolidate tsc calibration
Move the TSC calibration code to tsc.c. Reimplement it so the
pm timer can be used as a reference as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
2007-10-12 23:04:06 +02:00
Andres Salomon 8f36881b3c x86: Geode MFGPT clock event device support
Add support for an MFGPT clock event device; this allows us to use MFGPTs as
the basis for high-resolution timers.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Andres Salomon <dilinger@debian.org>
Cc: Andi Kleen <ak@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: john stultz <johnstul@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-12 23:04:06 +02:00