Commit Graph

12813 Commits

Author SHA1 Message Date
Thomas Gleixner
a906fdaacc x86: dt: Cleanup local apic setup
Up to now we force enable the local apic in the devicetree setup
uncoditionally and set smp_found_config unconditionally to 1 when a
devicetree blob is available. This breaks, when local apic is disabled
in the Kconfig.

Make it consistent by initializing device tree explicitely before
smp_get_config() so a non lapic configuration could be used as well.
To be functional that would require to implement PIT as an interrupt
host, but the only user of this code until now is ce4100 which
requires apics to be available. So we leave this up to those who need
it.

Tested-by: Sebastian Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-25 16:18:52 +01:00
David Rientjes
1f565a896e x86-64, NUMA: Fix size of numa_distance array
numa_distance should be sized like the SLIT, an NxN matrix where N is
the highest node id + 1.  This patch fixes the calculation to avoid
overflowing the array on the subsequent iteration.

-tj: The original patch used last index to calculate size.  Yinghai
     pointed out it should be incremented so it is the number of
     elements instead of the last index to calculate the size of the
     table.  Updated accordingly.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-25 10:10:54 +01:00
Linus Torvalds
86e2fe9ff3 Merge branch 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SVM: Advance instruction pointer in dr_intercept
2011-02-24 12:22:14 -08:00
Andreas Herrmann
7f74f8f28a x86 quirk: Fix polarity for IRQ0 pin2 override on SB800 systems
On some SB800 systems polarity for IOAPIC pin2 is wrongly
specified as low active by BIOS. This caused system hangs after
resume from S3 when HPET was used in one-shot mode on such
systems because a timer interrupt was missed (HPET signal is
high active).

For more details see:

  http://marc.info/?l=linux-kernel&m=129623757413868

Tested-by: Manoj Iyer <manoj.iyer@canonical.com>
Tested-by: Andre Przywara <andre.przywara@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: stable@kernel.org # 37.x, 32.x
LKML-Reference: <20110224145346.GD3658@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-24 20:30:21 +01:00
Yinghai Lu
d1b19426b0 x86: Rename e820_table_* to pgt_buf_*
e820_table_{start|end|top}, which are used to buffer page table
allocation during early boot, are now derived from memblock and don't
have much to do with e820.  Change the names so that they reflect what
they're used for.

This patch doesn't introduce any behavior change.

-v2: Ingo found that earlier patch "x86: Use early pre-allocated page
     table buffer top-down" caused crash on 32bit and needed to be
     dropped.  This patch was updated to reflect the change.

-tj: Updated commit description.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-24 14:52:18 +01:00
Sebastian Andrzej Siewior
4a66b1d95a x86: dt: Fix OLPC=y/INTEL_CE=n build
Both OLPC and CE4100 activate CONFIG_OF. OLPC uses PROMTREE while CE
uses FLATTREE. Compiling for OLPC only breaks due to missing flat tree
functions and variables.

Use proper wrappers and provide an empty x86_flattree_get_config()
inline so OF=y FLATTREE=n builds and works.

[ tglx: Make it work with HPET_TIMER=n and make a function static ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-24 13:01:59 +01:00
Jacob Pan
7b62dbec90 x86/mrst: Fix apb timer rating when lapic timer is used
Need to adjust the clockevent device rating for the structure
that will be registered with clockevent system instead of the
temporary structure.

Without this fix, APB timer rating will be higher than LAPIC
timer such that it can not be released later to be used as the
broadcast timer.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
LKML-Reference: <1298506046-439-1-git-send-email-jacob.jun.pan@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-24 08:22:43 +01:00
Sebastian Andrzej Siewior
3bcbaf6e08 rtc: cmos: Add OF bindings
This allows to load the OF driver based informations from the device
tree. Systems without BIOS may need to perform some initialization.
PowerPC creates a PNP device from the OF information and performs this
kind of initialization in their private PCI quirk. This looks more
generic.

This patch also avoids registering the platform RTC driver on X86 if
we have a device tree blob. Otherwise we would setup the device based
on the hardcoded information in arch/x86 rather than the device tree
based one.

[ tglx: Changed "int of_have_populated_dt()" to bool as recommended by
        Grant ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
Cc: rtc-linux@googlegroups.com
Cc: Alessandro Zummo <a.zummo@towertech.it>
LKML-Reference: <1298405266-1624-12-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:55 +01:00
Sebastian Andrzej Siewior
1fa4163bdc x86: ce4100: Use OF to setup devices
Use device tree information to setup IO_APIC configuration, interrupt
routing, HPET and everything else which cannot be enumerated by other
means.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-11-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:54 +01:00
Sebastian Andrzej Siewior
bcc7c1244f x86: ioapic: Add OF bindings for IO_APIC
ioapic_xlate provides a translation from the information in device tree
to ioapic related informations. This includes
- obtaining hw irq which is the vector number "=> pin number + gsi"
- obtaining type (level/edge/..)
- programming this information into ioapic

ioapic_add_ofnode adds an irq_domain based on informations from the device
tree. This information (irq_domain) is required in order to map a device to
its proper interrupt controller.

[ tglx: Adapted to the io_apic changes, which let us move that whole code
  	to devicetree.c ]

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-10-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:54 +01:00
Sebastian Andrzej Siewior
9079b35364 x86: dtb: Add generic bus probe
For now we probe these busses and we change this to board dependent
probes once we have to.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-9-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:54 +01:00
Sebastian Andrzej Siewior
96e0a0797e x86: dtb: Add support for PCI devices backed by dtb nodes
x86_of_pci_init() does two things:

- it provides a generic irq enable and disable function. enable queries
  the device tree for the interrupt information, calls ->xlate on the
  irq host and updates the pci->irq information for the device.

- it walks through PCI bus(es) in the device tree and adds its children
  (device) nodes to appropriate pci_dev nodes in kernel. So the dtb
  node information is available at probe time of the PCI device.

Adding a PCI bus based on the information in the device tree is
currently not supported. Right now direct access via ioports is used.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-8-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:53 +01:00
Sebastian Andrzej Siewior
ffb9fc68df x86: dtb: Add device tree support for HPET
Set hpet_address based on information provied form DTB

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Dirk Brandewie <dirk.brandewie@gmail.com>
LKML-Reference: <1298405266-1624-7-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:53 +01:00
Sebastian Andrzej Siewior
3879a6f329 x86: dtb: Add early parsing of IO_APIC
APIC and IO_APIC have to be added to the system early because
native_init_IRQ() requires it.

In order to obtain the address of the ioapic the device tree has to be
unflattened so of_address_to_resource() works.

The device tree is relocated to ensure it is always covered by the
kernel mapping. That way the boot loader does not have to make
any assumptions about kernel's memory layout.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Dirk Brandewie <dirk.brandewie@gmail.com>
LKML-Reference: <1298405266-1624-6-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:53 +01:00
Sebastian Andrzej Siewior
19c4f5f7f7 x86: dtb: Add irq domain abstraction
The here introduced irq_domain abstraction represents a generic irq
controller. It is a subset of powerpc's irq_host which is going to be
renamed to irq_domain and then become generic. This implementation will
be removed once it is generic.

The xlate callback is resposible to parse irq informations like irq type
and number and returns the hardware irq number which is reported by the
hardware as active.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-5-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:53 +01:00
Sebastian Andrzej Siewior
df2634f43f x86: dtb: Add a device tree for CE4100
History:
v1..v2:
- dropped device_type except for cpu & pci. I have the compatible string
  for pci so I can drop the device_type once it is possible
- I lowercased all compatible types. I will need to resend some patches
  which have upper case intel
- The cpu had the same compatible string as the soc node. So I added to
  the soc node -immr for internel memory mapped registers.
- I added generic names for all parts.
- I reworked the i2c bars matching the way you suggested. I added a
  compatible node for the PCI device which only the PCI ids in its
  compatible string. The bars (each represents a complete i2c
  controller) have a "intel,ce4100-i2c-controller" compatible node. It
  is not used by the driver.
  The driver is probed via PCI ids (by the pci subsystem not OF) and
  matches the bar address against the ressource in the child node. Once
  there is a hit the node is attached.
- The SPI driver is also probed via pci. However I also attached a
  compatible property based on PCI ids

v2..v3:
- intel,ce4100-immr become intel,ce4100-cp. cp stands for core
  peripherals. The Atom data sheet talks here about ACPI devices. Since
  we don't have ACPI this does not apply here.
- The interrupt map is gone. There are now plenty of device nodes.
- The "unit address string" got fixed, it uses not DD,V format.

v3..v4:
- added descriptions for compatible nodes introduced here:
  - intel,ce4100-ioapic
  - intel,ce4100-lapic
  - intel,ce4100-hpet
  - intel,ce4100
  - intel,ce4100-cp
  - intel,ce4100-pci
- added a description about I2C controller magic.
- Added gpio-controller and gpio-cells property to gpio devices. Those
  properties are not (yet) used.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-4-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:52 +01:00
Sebastian Andrzej Siewior
da6b737b9a x86: Add device tree support
This patch adds minimal support for device tree on x86. The device
tree blob is passed to the kernel via setup_data which requires at
least boot protocol 2.09.

Memory size, restricted memory regions, boot arguments are gathered
the traditional way so things like cmd_line are just here to let the
code compile.

The current plan is use the device tree as an extension and to gather
information which can not be enumerated and would have to be hardcoded
otherwise. This includes things like 
   - which devices are on this I2C/SPI bus?
   - how are the interrupts wired to IO APIC?
   - where could my hpet be?

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-3-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:52 +01:00
Sebastian Andrzej Siewior
f1c2b35714 x86: e820: Remove conditional early mapping in parse_e820_ext
This patch ensures that the memory passed from parse_setup_data() is
large enough to cover the complete data structure. That means that the
conditional mapping in parse_e820_ext() can go.

While here, I also attempt not to map two pages if the address is not
aligned to a page boundary.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Cc: sodaville@linutronix.de
Cc: devicetree-discuss@lists.ozlabs.org
LKML-Reference: <1298405266-1624-2-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 22:27:52 +01:00
Thomas Gleixner
cb4cfd568c Merge branch 'x86/apic' into x86/platform
Reason: Devicetree based ioapic setup depends on the apic changes.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 20:01:01 +01:00
Thomas Gleixner
abb0052289 x86: ioapic: Move trigger defines to io_apic.h
Required for devicetree based io_apic configuration.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 19:58:09 +01:00
Thomas Gleixner
710dcda643 x86: ioapic: Implement and use io_apic_setup_irq_pin_once()
io_apic_set_pci_routing() and mp_save_irq() check the pin_programmed
bit before calling io_apic_setup_irq_pin() and set the bit when the
pin was setup.

Move that duplicated code into a separate function and use it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 18:58:09 +01:00
Thomas Gleixner
b77cf6a860 x86: ioapic: Remove useless inlines
There is no point to have irq_trigger() and irq_polarity() as wrappers
around the MPBIOS_* camel case functions. Get rid of both the inlines
and the ugly camel case.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:38:23 +01:00
Thomas Gleixner
41098ffe05 x86: ioapic: Make a few functions static
No users outside of io_apic.c. Mark bad_ioapic() __init while at it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:51 +01:00
Thomas Gleixner
da1ad9d7b2 x86: ioapic: Use setup function in setup_IO_APIC_irq_extra()
Another version of the same thing. Only set the pin programmed, when
the setup function succeeds.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:50 +01:00
Thomas Gleixner
2d57e37dbf x86: ioapic: Use setup function in __io_apic_setup_irqs()
Replace the duplicated code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:50 +01:00
Thomas Gleixner
e0799c04b2 x86: ioapic: Use setup function in __io_apic_set_pci_routing()
The only difference here is that we did not call
__add_pin_to_irq_node() for the legacy irqs, but that's not worth 30
lines of extra code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:49 +01:00
Thomas Gleixner
f880ec78fa x86: ioapic: Use new setup function in pre_init_apic_IRQ0()
Remove the duplicated code and call the function. It does not matter
whether we allocated the cfg before calling setup_local_APIC() and we
can set the irq chip and handler after that as well.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:49 +01:00
Thomas Gleixner
ff973d041e x86: ioapic: Add io_apic_setup_irq_pin()
There are about four places in the ioapic code which do exactly the
same setup sequence. Also the OF based ioapic setup needs that
function to avoid putting the OF specific code into ioapic.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:49 +01:00
Thomas Gleixner
ed972ccf43 x86: ioapic: Split out the nested loop in setup_IO_APIC_irqs()
Two consecutive

    for(...)
    for(...)

lines to avoid an extra indentation are just horrible to read. I had
to look more than once to figure out what the code is doing.

Split out the inner loop into a separate function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:49 +01:00
Thomas Gleixner
c8d6b8fe72 x86: ioapic: Remove silly debug bloat in setup_IOAPIC_irqs()
This is debug code and it does not matter at all whether we print each
not connected pin in an extra line or try to be extra clever.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 17:26:48 +01:00
Thomas Gleixner
939d578ecc x86: OLPC: Make OLPC=n build again
Stupid me missed the functions called from setup.c. Add the stubs back
for OLPC=n

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 11:54:02 +01:00
Henrik Kretzschmar
1444e0c9da x86: Fix deps of X86_UP_IOAPIC
Since commit 7cd92366a5
lAPIC enabled accidently the IOAPIC, which now gets fixed.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
LKML-Reference: <1298385487-4708-5-git-send-email-henne@nachtwindheim.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23 11:38:46 +01:00
Henrik Kretzschmar
7d0f192613 x86: Add dummy functions for compiling without IOAPIC
This patch adds IOAPIC dummy functions for compilation
with local APIC, but without IOAPIC.

The local variable ioapic_entries in enable_IR_x2apic()
does not need initialization anymore, since the dummy
returns NULL.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
LKML-Reference: <1298385487-4708-4-git-send-email-henne@nachtwindheim.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23 11:38:46 +01:00
Henrik Kretzschmar
7167d08e78 x86: Rework arch_disable_smp_support() for x86
Currently arch_disable_smp_support() on x86 disables only the
support for the IOAPIC and is also compiled in if SMP-support is
not.

Therefore this function is renamed to disable_ioapic_support(),
which meets its purpose and is only compiled in the kernel
when IOAPIC support is also.

A new arch_disable_smp_support() is created in smpboot.c,
which calls disable_ioapic_support() and gets only compiled
in the kernel when SMP support is also.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
LKML-Reference: <1298385487-4708-3-git-send-email-henne@nachtwindheim.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23 11:38:45 +01:00
Henrik Kretzschmar
b6a1432da8 x86: Add dummy mp_save_irq()
This is a dummy function, used when no IOAPIC is compiled in.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
LKML-Reference: <1298385487-4708-2-git-send-email-henne@nachtwindheim.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23 11:38:45 +01:00
Henrik Kretzschmar
4e034b2451 x86: Move ioapic_irq_destination_types to apicdef.h
This enum is used by non IOAPIC code, so apicdef.h is
the best place for it.

Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de>
LKML-Reference: <1298385487-4708-1-git-send-email-henne@nachtwindheim.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-23 11:38:44 +01:00
Thomas Gleixner
c2a941fadb x86: OLPC: Remove extra OLPC_OPENFIRMWARE_DT indirection
OLPC_OPENFIRMWARE_DT is just there to be selected by OLPC and selects
OF_PROMTREE. So let OLPC select OF_PROMTREE and remove that extra
config indirection. Fixup code and Makefile and use CONFIG_OF_PROMTREE
instead.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andres Salomon <dilinger@queued.net>
2011-02-23 10:40:45 +01:00
Thomas Gleixner
dc3119e700 x86: OLPC: Cleanup config maze completely
Neither CONFIG_OLPC_OPENFIRMWARE nor CONFIG_OLPC_OPENFIRMWARE_DT are
really necessary.

OLPC selects OLPC_OPENFIRMWARE unconditionally, so move the "select
OF" part under OLPC config option and fixup the dependencies in
Makefiles and code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andres Salomon <dilinger@queued.net>
2011-02-23 10:40:45 +01:00
Thomas Gleixner
fe239545a1 x86: OLPC: Hide OLPC_OPENFIRMWARE config switch
OLPC selects OLPC_OPENFIRMWARE unconditionally. If OLPC=n then
the OLPC_OPENFIRMWARE functionality is pointless.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andres Salomon <dilinger@queued.net>
2011-02-23 10:40:45 +01:00
Thomas Gleixner
540089798d x86: OLPC: Remove redundant !X64_64 config dependency
OLPC is under if X86_32 already.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andres Salomon <dilinger@queued.net>
2011-02-23 10:40:45 +01:00
Thomas Gleixner
7acdbb3f35 Merge branch 'linus' into x86/platform
Reason: Import mainline device tree changes on which further patches
        depend on or conflict.

Trivial conflict in: drivers/spi/pxa2xx_spi_pci.c

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-23 09:21:41 +01:00
Zhang, Fengzhe
2f14ddc3a7 xen/setup: Inhibit resource API from using System RAM E820 gaps as PCI mem gaps.
With the hypervisor argument of dom0_mem=X we iterate over the physical
(only for the initial domain) E820 and subtract the the size from each
E820_RAM region the delta so that the cumulative size of all E820_RAM regions
is equal to 'X'. This sometimes ends up with E820_RAM regions with zero size
(which are removed by e820_sanitize) and E820_RAM that are smaller
than physically.

Later on the PCI API looks at the E820 and attempts to set up an
resource region for the "PCI mem". The E820 (assume dom0_mem=1GB is
set) compared to the physical looks as so:

 [    0.000000] BIOS-provided physical RAM map:
 [    0.000000]  Xen: 0000000000000000 - 0000000000097c00 (usable)
 [    0.000000]  Xen: 0000000000097c00 - 0000000000100000 (reserved)
-[    0.000000]  Xen: 0000000000100000 - 00000000defafe00 (usable)
+[    0.000000]  Xen: 0000000000100000 - 0000000040000000 (usable)
 [    0.000000]  Xen: 00000000defafe00 - 00000000defb1ea0 (ACPI NVS)
 [    0.000000]  Xen: 00000000defb1ea0 - 00000000e0000000 (reserved)
 [    0.000000]  Xen: 00000000f4000000 - 00000000f8000000 (reserved)
..
And we get
[    0.000000] Allocating PCI resources starting at 40000000 (gap: 40000000:9efafe00)

while it should have started at e0000000 (a nice big gap up to
f4000000 exists). The "Allocating PCI" is part of the resource API.

The users that end up using those PCI I/O regions usually supply their
own BARs when calling the resource API (request_resource, or allocate_resource),
but there are exceptions which provide an empty 'struct resource' and
expect the API to provide the 'struct resource' to be populated with valid values.
The one that triggered this bug was the intel AGP driver that requested
a region for the flush page (intel_i9xx_setup_flush).

Before this patch, when running under Xen hypervisor, the 'struct resource'
returned could have (depending on the dom0_mem size) physical ranges of a 'System RAM'
instead of 'I/O' regions. This ended up with the Hypervisor failing a request
to populate PTE's with those PFNs as the domain did not have access to those
'System RAM' regions (rightly so).

After this patch, the left-over E820_RAM region from the truncation, will be
labeled as E820_UNUSABLE. The E820 will look as so:

 [    0.000000] BIOS-provided physical RAM map:
 [    0.000000]  Xen: 0000000000000000 - 0000000000097c00 (usable)
 [    0.000000]  Xen: 0000000000097c00 - 0000000000100000 (reserved)
-[    0.000000]  Xen: 0000000000100000 - 00000000defafe00 (usable)
+[    0.000000]  Xen: 0000000000100000 - 0000000040000000 (usable)
+[    0.000000]  Xen: 0000000040000000 - 00000000defafe00 (unusable)
 [    0.000000]  Xen: 00000000defafe00 - 00000000defb1ea0 (ACPI NVS)
 [    0.000000]  Xen: 00000000defb1ea0 - 00000000e0000000 (reserved)
 [    0.000000]  Xen: 00000000f4000000 - 00000000f8000000 (reserved)

For more information:
http://mid.gmane.org/1A42CE6F5F474C41B63392A5F80372B2335E978C@shsmsx501.ccr.corp.intel.com

BugLink: http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1726

Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-22 12:48:50 -05:00
Thomas Gleixner
695884fb8a Merge branch 'devicetree/for-x86' of git://git.secretlab.ca/git/linux-2.6 into x86/platform
Reason: x86 devicetree support for ce4100 depends on those device tree
	changes scheduled for .39.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-22 18:41:48 +01:00
Joerg Roedel
2c46d2aec0 KVM: SVM: Advance instruction pointer in dr_intercept
In the dr_intercept function a new cpu-feature called
decode-assists is implemented and used when available. This
code-path does not advance the guest-rip causing the guest
to dead-loop over mov-dr instructions. This is fixed by this
patch.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-02-22 16:01:44 +02:00
Yinghai Lu
2bf50555b0 x86-64, NUMA: Seperate out numa_alloc_distance() from numa_set_distance()
Alloc code is much bigger the distance setting.  Separate it out into
numa_alloc_distance() for readability.

-v2: Let alloc_numa_distance to return -ENOMEM on failing path,
     requested by tj.

-tj: Description update.  Minor tweaks including function name,
     location and return value check.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-22 11:18:49 +01:00
Tejun Heo
90e6b677b4 x86-64, NUMA: Add proper function comments to global functions
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
2011-02-22 11:10:08 +01:00
Tejun Heo
b8ef9172b2 x86-64, NUMA: Move NUMA emulation into numa_emulation.c
Create numa_emulation.c and move all NUMA emulation code there.  The
definitions of struct numa_memblk and numa_meminfo are moved to
numa_64.h.  Also, numa_remove_memblk_from(), numa_cleanup_meminfo(),
numa_reset_distance() along with numa_emulation() are made global.

- v2: Internal declarations moved to numa_internal.h as suggested by
      Yinghai.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
2011-02-22 11:10:08 +01:00
Tejun Heo
fbe99959d1 x86-64, NUMA: Prepare numa_emulation() for moving NUMA emulation into a separate file
Update numa_emulation() such that, it

- takes @numa_meminfo and @numa_dist_cnt instead of directly
  referencing the global variables.

- copies the distance table by iterating each distance with
  node_distance() instead of memcpy'ing the distance table.

- tests emu_cmdline to determine whether emulation is requested and
  fills emu_nid_to_phys[] with identity mapping if emulation is not
  used.  This allows the caller to call numa_emulation()
  unconditionally and makes return value unncessary.

- defines dummy version if CONFIG_NUMA_EMU is disabled.

This patch doesn't introduce any behavior change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
2011-02-22 11:10:08 +01:00
Yinghai Lu
69efcc6d90 x86-64, NUMA: Do not scan two times for setup_node_bootmem()
By the time setup_node_bootmem() is called, all the memblocks are
already registered.  As node_data is allocated from these memblocks,
calling it more than once doesn't make any difference.  Drop the loop.

tj: Dropped comment referencing to the old behavior as suggested by
    David and rephrased the description.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-21 11:23:31 +01:00
Kushal Koolwal
e19e074b15 x86: Fix reboot problem on VersaLogic Menlow boards
VersaLogic Menlow based boards hang on reboot unless reboot=bios
is used. Add quirk to reboot through the BIOS.

Tested on at least four boards.

Signed-off-by: Kushal Koolwal <kushalkoolwal@gmail.com>
LKML-Reference: <1298152563-21594-1-git-send-email-kushalkoolwal@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-21 08:41:26 +01:00
Dan Carpenter
1396fa9cd2 x86, microcode, AMD: Fix signedness bug in generic_load_microcode()
install_equiv_cpu_table() returns type int.  It uses negative
error codes so using an unsigned type breaks the error handling.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: open list:AMD MICROCODE UPD... <amd64-microcode@amd64.org>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20110218091716.GA4384@bicker>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-20 14:01:32 +01:00
Borislav Petkov
2b15cd96e5 x86, system.h: Drop unused __SAVE/__RESTORE macros
Those are unused since at least the beginning of git history.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1298044056-31104-1-git-send-email-bp@amd64.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-20 13:38:47 +01:00
H. Peter Anvin
1c4badbdea x86-64, trampoline: Remove unused variable
Removed unused variable left over from development.

Reported-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <AANLkTik6UJ680mWJcu_W+jerLcqPjwjvaXyxB1jAMaG0@mail.gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
2011-02-18 15:50:36 -08:00
H. Peter Anvin
ee1b06ea6a x86, reboot: Fix the use of passed arguments in 32-bit BIOS reboot
The initial version of this patch had %eax being a segment and %ecx
being the mode.  I had changed the interfaces, but not the actual
implementation!

Reported-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <AANLkTikxqk=HEw9R-Du=v-1ti1HDGAY9vaNUep2XARaz@mail.gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
2011-02-18 15:47:42 -08:00
jacob.jun.pan@linux.intel.com
5df91509d3 x86: mrst: Remove apb timer read workaround
APB timer current count was unreliable in the earlier silicon, which
could result in time going backwards. This problem has been fixed in
the current silicon stepping. This patch removes the workaround which
was used to check and prevent timer rolling back when APB timer is
used as clocksource device.

The workaround code was also flawed by potential race condition
around the cached read value last_read. Though a fix can be done
by assigning last_read to a local variable at the beginning of
apbt_read_clocksource(), but this is not necessary anymore.

[ tglx: A sane timer on an Intel chip - I can't believe it ]

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Alan Cox <alan@linux.intel.com>
LKML-Reference: <1298065374-25532-1-git-send-email-jacob.jun.pan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-18 23:14:54 +01:00
Konrad Rzeszutek Wilk
3d74a539ae pci/xen: When free-ing MSI-X/MSI irq->desc also use generic code.
This code path is only run when an MSI/MSI-X PCI device is passed
in to PV DomU.

In 2.6.37 time-frame we over-wrote the default cleanup handler for
MSI/MSI-X irq->desc to be "xen_teardown_msi_irqs". That function
calls the the xen-pcifront driver which can tell the backend to
cleanup/take back the MSI/MSI-X device.

However, we forgot to continue the process of free-ing the MSI/MSI-X
device resources (irq->desc) in the PV domU side. Which is what
the default cleanup handler: default_teardown_msi_irqs did.

Hence we would leak IRQ descriptors.

Without this patch, doing "rmmod igbvf;modprobe igbvf" multiple
times ends with abandoned IRQ descriptors:

 28:          5  xen-pirq-pcifront-msi-x
 29:          8  xen-pirq-pcifront-msi-x
...
130:         10  xen-pirq-pcifront-msi-x

with the end result of running out of IRQ descriptors.

Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-18 12:41:53 -05:00
Konrad Rzeszutek Wilk
cc0f89c4a4 pci/xen: Cleanup: convert int** to int[]
Cleanup code. Cosmetic change to make the code look easier
to read.

Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-18 12:41:49 -05:00
Sebastian Andrzej Siewior
13884c6680 x86/pci: Remove unused variable
|arch/x86/pci/ce4100.c: In function `ce4100_conf_read':
|arch/x86/pci/ce4100.c:257:9: warning: unused variable `retval'

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: dirk.brandewie@gmail.com
LKML-Reference: <1292600033-12271-16-git-send-email-bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-18 16:57:18 +01:00
Konrad Rzeszutek Wilk
55cb8cd45e pci/xen: Use xen_allocate_pirq_msi instead of xen_allocate_pirq
xen_allocate_pirq -> xen_map_pirq_gsi -> PHYSDEVOP_alloc_irq_vector IFF
xen_initial_domain() in addition to the kernel side book-keeping side of
things (set chip and handler, update irq_info etc) whereas
xen_allocate_pirq_msi just does the kernel book keeping.

Also xen_allocate_pirq allocates an IRQ in the 1-1 GSI space whereas
xen_allocate_pirq_msi allocates a dynamic one in the >GSI IRQ space.

All of this is uneccessary as this code path is only executed
when we run as a domU PV guest with an MSI/MSI-X PCI card passed in.
Hence we can jump straight to allocating an dynamic IRQ (and
binding it to the proper PIRQ) and skip the rest.

In short: this change is a cosmetic one.

Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-18 09:26:37 -05:00
Jan Beulich
58bff947e2 x86: Eliminate pointless adjustment attempts in fixup_irqs()
Not only when an IRQ's affinity equals cpu_online_mask is there
no need to actually try to adjust the affinity, but also when
it's a subset thereof. This particularly avoids adjustment
attempts during system shutdown to any IRQs bound to CPU#0.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Gary Hade <garyhade@us.ibm.com>
LKML-Reference: <4D5D52C2020000780003272C@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-18 08:58:00 +01:00
Jan Beulich
02ca752e41 x86: Remove die_nmi()
With no caller left, the function and the DIE_NMIWATCHDOG
enumerator can both go away.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Don Zickus <dzickus@redhat.com>
LKML-Reference: <4D5D521C0200007800032702@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-18 08:54:05 +01:00
Jan Beulich
fd8fa4d3dd x86: Combine printk()s in show_regs_common()
Printing a single character alone when there's an immediately
following printk() is pretty pointless (and wasteful).

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4D5D535A0200007800032730@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-18 08:52:30 +01:00
Jan Beulich
bb3e6251a6 x86: Don't call dump_stack() from arch_trigger_all_cpu_backtrace_handler()
show_regs() already prints two(!) stack traces, no need for a third one.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4D5D512902000078000326EE@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-18 08:52:29 +01:00
H. Peter Anvin
3d35ac346e x86, reboot: Move the real-mode reboot code to an assembly file
Move the real-mode reboot code out to an assembly file (reboot_32.S)
which is allocated using the common lowmem trampoline allocator.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
2011-02-17 21:05:34 -08:00
H. Peter Anvin
014eea518a x86: Make the GDT_ENTRY() macro in <asm/segment.h> safe for assembly
Make the GDT_ENTRY() macro in  <asm/segment.h> safe for use in
assembly code by guarding the ULL suffixes with _AC() macros.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
2011-02-17 21:05:13 -08:00
H. Peter Anvin
d1ee433539 x86, trampoline: Use the unified trampoline setup for ACPI wakeup
Use the unified trampoline allocation setup to allocate and install
the ACPI wakeup code in low memory.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
2011-02-17 21:05:06 -08:00
H. Peter Anvin
4822b7fc6d x86, trampoline: Common infrastructure for low memory trampolines
Common infrastructure for low memory trampolines.  This code installs
the trampolines permanently in low memory very early.  It also permits
multiple pieces of code to be used for this purpose.

This code also introduces a standard infrastructure for computing
symbol addresses in the trampoline code.

The only change to the actual SMP trampolines themselves is that the
64-bit trampoline has been made reusable -- the previous version would
overwrite the code with a status variable; this moves the status
variable to a separate location.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4D5DFBE4.7090104@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Matthieu Castet <castet.matthieu@free.fr>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
2011-02-17 21:02:43 -08:00
Len Brown
bfb53ccf1c intel_idle: disable Atom/Lincroft HW C-state auto-demotion
Just as we had to disable auto-demotion for NHM/WSM,
we need to do the same for Atom (Lincroft version).

In particular, auto-demotion will prevent Lincroft
from entering the S0i3 idle power saving state.

https://bugzilla.kernel.org/show_bug.cgi?id=25252

Signed-off-by: Len Brown <len.brown@intel.com>
2011-02-17 17:08:48 -05:00
Len Brown
14796fca2b intel_idle: disable NHM/WSM HW C-state auto-demotion
Hardware C-state auto-demotion is a mechanism where the HW overrides
the OS C-state request, instead demoting to a shallower state,
which is less expensive, but saves less power.

Modern Linux should generally get exactly the states it requests.
In particular, when a CPU is taken off-line, it must not be demoted, else
it can prevent the entire package from reaching deep C-states.

https://bugzilla.kernel.org/show_bug.cgi?id=25252

Signed-off-by: Len Brown <len.brown@intel.com>
2011-02-17 17:08:46 -05:00
Yinghai Lu
6d496f9f23 x86-64, NUMA: Put dummy_numa_init() in the init section
dummy_numa_init() is used only during system boot.  Put it in .init
like other NUMA init functions.

- tj: Description update.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
2011-02-17 15:04:20 +01:00
Yinghai Lu
2ca230baeb x86-64, NUMA: Don't call __pa() with invalid address in numa_reset_distance()
Do not call __pa(numa_distance) if it was not allocated before.
Calling with invalid address triggers VIRTUAL_BUG_ON() in
__phys_addr() if CONFIG_DEBUG_VIRTUAL.

Also reported by Ingo.

 http://thread.gmane.org/gmane.linux.kernel/1101306/focus=1101785

- v2: Change to check existing path as tj requested.
- tj: Description update.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>
2011-02-17 15:03:43 +01:00
Akinobu Mita
da1016df85 x86: Use bitmap library functions
Use bitmap_set()/bitmap_clear() to fill/zero a region of a
bitmap instead of doing set_bit()/clear_bit() each bit.

This change has been tested with ioperm() and there's no
change in behavior.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <1297867715-20394-1-git-send-email-akinobu.mita@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-17 14:59:22 +01:00
Tejun Heo
e23bba6044 x86-64, NUMA: Unify emulated distance mapping
NUMA emulation needs to update node distance information.  It did it
by remapping apicid to PXM mapping, even when amdtopology is being
used.  There is no reason to go through such convolution.  The generic
code has all the information necessary to transform the distance table
to the emulated nid space.

Implement generic distance table transformation in numa_emulation()
and drop private implementations in srat_64 and amdtopology_64.  This
makes find_node_by_addr() and fake_physnodes() and related functions
unnecessary, drop them.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
6b78cb549b x86-64, NUMA: Unify emulated apicid -> node mapping transformation
NUMA emulation changes node mappings and thus apicid -> node mapping
needs to be updated accordingly.  srat_64 and amdtopology_64 did this
separately; however, all the necessary information is the mapping from
emulated nodes to physical nodes which is available in
emu_nid_to_phys[].

Implement common __apicid_to_node[] transformation in numa_emulation()
and drop duplicate implementations.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
1cca534073 x86-64, NUMA: Emulate directly from numa_meminfo
NUMA emulation built physnodes[] array which could only represent
configurations from the physical meminfo and emulated nodes using the
information.  There's no reason to take this extra level of
indirection.  Update emulation functions so that they operate directly
on numa_meminfo.  This simplifies the code and makes emulation layout
behave better with interleaved physical nodes.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
775ee85d7b x86-64, NUMA: Wrap node ID during emulation
Both emulation layout functions - split_nodes[_size]_interleave() -
didn't wrap emulated nid while laying out the fake nodes and tried to
avoid interating over the specified number of nodes, which is fragile.

Now that the emulation code generates numa_meminfo, the node memblks
don't need to be consecutive and emulated node IDs can simply wrap.
This makes the code more robust and is necessary for updates to better
handle the cases where the physical nodes are interleaved.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
c88aea7a70 x86-64, NUMA: Make emulation code build numa_meminfo and share the registration path
NUMA emulation code built nodes[] array and had its own registration
path to set up the emulated nodes.  Update it such that it generates
emulated numa_meminfo and returns control to initmem_init() and shares
the same registration path with non-emulated cases.

Because {acpi|amd}_fake_nodes() expect nodes[] parameter,
fake_physnodes() now generates nodes[] from numa_meminfo.  This will
go away with further updates.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
9d073caeb3 x86-64, NUMA: Build and use direct emulated nid -> phys nid mapping
NUMA emulation copied physical NUMA configuration into physnodes[] and
used it to reverse-map emulated nodes to physical nodes, which is
unnecessarily convoluted.  Build emu_nid_to_phys[] array to map
emulated nids directly to the matching physical nids and use it in
numa_add_cpu().

physnodes[] will be removed with further patches.

- v2: Build failure when CONFIG_DEBUG_PER_CPU_MAPS due to missing
  local variable definition fixed.  Reported by Ingo.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
d9c515eacb x86-64, NUMA: Trivial changes to prepare for emulation updates
* Separate out numa_add_memblk_to() from numa_add_memblk() so that
  different numa_meminfo can be used.

* Rename cmdline to emu_cmdline.

* Drop @start/last_pfn from numa_emulation() and use max_pfn directly.

This patch doesn't introduce any behavior change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:10 +01:00
Tejun Heo
ac7136b611 x86-64, NUMA: Implement generic node distance handling
Node distance either used direct node comparison, ACPI PXM comparison
or ACPI SLIT table lookup.  This patch implements generic node
distance handling.  NUMA init methods can call numa_set_distance() to
set distance between nodes and the common __node_distance()
implementation will report the set distance.

Due to the way NUMA emulation is implemented, the generic node
distance handling is used only when emulation is not used.  Later
patches will update NUMA emulation to use the generic distance
mechanism.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
4697bdcc94 x86-64, NUMA: Kill mem_nodes_parsed
With all memory configuration information now carried in numa_meminfo,
there's no need to keep mem_nodes_parsed separate.  Drop it and use
numa_nodes_parsed for CPU / memory-less nodes.

A new helper numa_nodemask_from_meminfo() is added to calculate
memnode mask on the fly which is currently used to set
node_possible_map.

This simplifies NUMA init methods a bit and removes a source of
possible inconsistencies.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
92d4a4371e x86-64, NUMA: Rename cpu_nodes_parsed to numa_nodes_parsed
It's no longer necessary to keep both cpu_nodes_parsed and
mem_nodes_parsed.  In preparation for merge, rename cpu_nodes_parsed
to numa_nodes_parsed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
91556237ec x86-64, NUMA: Kill numa_nodes[]
numa_nodes[] doesn't carry any information which isn't present in
numa_meminfo.  Each entry is simply min/max range of all the memblks
for the node.  This is not only redundant but also inaccurate when
memblks for different nodes interleave - for example,
find_node_by_addr() can return the wrong nodeid.

Kill numa_nodes[] and always use numa_meminfo instead.

* nodes_cover_memory() is renamed to numa_meminfo_cover_memory() and
  now operations on numa_meminfo and returns bool.

* setup_node_bootmem() needs min/max range.  Compute the range on the
  fly.  setup_node_bootmem() invocation is restructured to use outer
  loop instead of hardcoding the double invocations.

* find_node_by_addr() now operates on numa_meminfo.

* setup_physnodes() builds physnodes[] from memblks.  This will go
  away when emulation code is updated to use struct numa_meminfo.

This patch also makes the following misc changes.

* Clearing of nodes_add[] clearing is converted to memset().

* numa_add_memblk() in amd_numa_init() is moved down a bit for
  consistency.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
a844ef46fa x86-64, NUMA: Add common find_node_by_addr()
srat_64.c and amdtopology_64.c had their own versions of
find_node_by_addr() which were basically the same.  Add common one in
numa_64.c and remove the duplicates.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
56e827fbde x86-64, NUMA: consolidate and improve memblk sanity checks
memblk sanity check was scattered around and incomplete.  Consolidate
and improve.

* Confliction detection and cutoff_node() logic are moved to
  numa_cleanup_meminfo().

* numa_cleanup_meminfo() clears the unused memblks before returning.

* Check and warn about invalid input parameters in numa_add_memblk().

* Check the maximum number of memblk isn't exceeded in
  numa_add_memblk().

* numa_cleanup_meminfo() is now called before numa_emulation() so that
  the emulation code also uses the cleaned up version.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
2e756be447 x86-64, NUMA: make numa_cleanup_meminfo() prettier
* Factor out numa_remove_memblk_from().

* Hole detection doesn't need separate start/end.  Calculate start/end
  once.

* Relocate comment.

* Define iterators at the top and remove unnecessary prefix
  increments.

This prepares for further improvements to the function.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
f9c60251c3 x86-64, NUMA: Separate out numa_cleanup_meminfo()
Separate out numa_cleanup_meminfo() from numa_register_memblks().
node_possible_map initialization is moved to the top of the split
numa_register_memblks().

This patch doesn't cause behavior change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:09 +01:00
Tejun Heo
97e7b78d06 x86-64, NUMA: Introduce struct numa_meminfo
Arrays for memblks and nodeids and their length lived in separate
variables making things unnecessarily cumbersome.  Introduce struct
numa_meminfo which contains all memory configuration info.  This patch
doesn't cause any behavior change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:08 +01:00
Tejun Heo
8968dab8ad x86-64, NUMA: Remove %NULL @nodeids handling from compute_hash_shift()
numa_emulation() called compute_hash_shift() with %NULL @nodeids which
meant identity mapping between index and nodeid.  Make
numa_emulation() build identity array and drop %NULL @nodeids handling
from populate_memnodemap() and thus from compute_hash_shift().  This
is to prepare for transition to using memblks instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:08 +01:00
Tejun Heo
5d371b08fe x86-64, NUMA: Kill {acpi|amd|dummy}_scan_nodes()
They are empty now.  Kill them.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:08 +01:00
Tejun Heo
fd0435d8fb x86-64, NUMA: Unify the rest of memblk registration
Move the remaining memblk registration logic from acpi_scan_nodes() to
numa_register_memblks() and initmem_init().

This applies nodes_cover_memory() sanity check, memory node sorting
and node_online() checking, which were only applied to acpi, to all
init methods.

As all memblk registration is moved to common code, active range
clearing is moved to initmem_init() too and removed from bad_srat().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:08 +01:00
Tejun Heo
43a662f04f x86-64, NUMA: Unify use of memblk in all init methods
Make both amd and dummy use numa_add_memblk() to describe the detected
memory blocks.  This allows initmem_init() to call
numa_register_memblk() regardless of init method in use.  Drop custom
memory registration codes from amd and dummy.

After this change, memblk merge/cleanup in numa_register_memblks() is
applied to all init methods.

As this makes compute_hash_shift() and numa_register_memblks() used
only inside numa_64.c, make them static.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:08 +01:00
Tejun Heo
ef396ec96c x86-64, NUMA: Factor out memblk handling into numa_{add|register}_memblk()
Factor out memblk handling from srat_64.c into two functions in
numa_64.c.  This patch doesn't introduce any behavior change.  The
next patch will make all init methods use these functions.

- v2: Fixed build failure on 32bit due to misplaced NR_NODE_MEMBLKS.
      Reported by Ingo.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 17:11:07 +01:00
Ingo Molnar
a3ec4a603f Merge commit 'v2.6.38-rc5' into core/locking
Merge reason: pick up upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:33:41 +01:00
Robert Richter
4979d2729a perf, x86: Add support for AMD family 15h core counters
This patch adds support for AMD family 15h core counters. There are
major changes compared to family 10h. First, there is a new perfctr
msr range for up to 6 counters. Northbridge counters are separate
now. This patch only adds support for core counters. Second, certain
events may only be scheduled on certain counters. For this we need to
extend the event scheduling and constraints.

We use cpu feature flags to calculate family 15h msr address offsets.
This way we later can implement a faster ALTERNATIVE() version for
this.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20110215135210.GB5874@erda.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:30:53 +01:00
Robert Richter
73d6e52206 perf, x86: Store perfctr msr addresses in config_base/event_base
Instead of storing the base addresses we can store the counter's msr
addresses directly in config_base/event_base of struct hw_perf_event.
This avoids recalculating the address with each msr access. The
addresses are configured one time. We also need this change to later
modify the address calculation.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1296664860-10886-5-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:30:52 +01:00
Robert Richter
69d8e1e8ac perf, x86: Add new AMD family 15h msrs to perfctr reservation code
This patch allows the reservation of perfctrs with new msr addresses
introduced for AMD cpu family 15h (0xc0010200/0xc0010201, etc).

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1296664860-10886-4-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:30:50 +01:00
Robert Richter
41bf498949 perf, x86: Calculate perfctr msr addresses in helper functions
This patch adds helper functions to calculate perfctr msr addresses.
We need this to later add support for AMD family 15h cpus. For this we
have to change the algorithms to generate the perfctr's msr addresses.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1296664860-10886-3-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:30:50 +01:00
Robert Richter
d45dd923fc perf, x86: Use helper function in x86_pmu_enable_all()
Use helper function in x86_pmu_enable_all() to minimize access to
x86_pmu.eventsel in the fast path. The counter's msr address is now
calculated using struct hw_perf_event. Later we add code that
calculates the msr addresses with a table lookup which shouldn't be
done in the fast path.

Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1296664860-10886-2-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:30:49 +01:00
Ingo Molnar
b00560f2d4 Merge branch 'perf/urgent' into perf/core
Merge reason: we need to queue up dependent patch

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 13:27:23 +01:00
Cyrill Gorcunov
7d44ec193d perf, x86: P4 PMU: Fix spurious NMI messages
Several people have reported spurious unknown NMI
messages on some P4 CPUs.

This patch fixes it by checking for an overflow (negative
counter values) directly, instead of relying on the
P4_CCCR_OVF bit.

Reported-by: George Spelvin <linux@horizon.com>
Reported-by: Meelis Roos <mroos@linux.ee>
Reported-by: Don Zickus <dzickus@redhat.com>
Reported-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Lin Ming <ming.m.lin@intel.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <AANLkTinfuTfCck_FfaOHrDqQZZehtRzkBum4SpFoO=KJ@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 12:26:12 +01:00
Tejun Heo
1909554870 x86-64, NUMA: Kill {acpi|amd}_get_nodes()
With common numa_nodes[], common code in numa_64.c can access it
directly.  Copy directly and kill {acpi|amd}_get_nodes().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:07 +01:00
Tejun Heo
206e42087a x86-64, NUMA: Use common numa_nodes[]
ACPI and amd are using separate nodes[] array.  Add numa_nodes[] and
use them in all NUMA init methods.  cutoff_node() cleanup is moved
from srat_64.c to numa_64.c and applied in initmem_init() regardless
of init methods.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:07 +01:00
Tejun Heo
45fe6c78c4 x86-64, NUMA: Move apicid to numa mapping initialization from amd_scan_nodes() to amd_numa_init()
This brings amd initialization behavior closer to that of acpi.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:07 +01:00
Tejun Heo
99df738cd2 x86-64, NUMA: Remove local variable found from amd_numa_init()
Use weight count on mem_nodes_parsed instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:07 +01:00
Tejun Heo
ec8cf29b1d x86-64, NUMA: Use common {cpu|mem}_nodes_parsed
ACPI and amd are using separate nodes_parsed masks.  Add
{cpu|mem}_nodes_parsed and use them in all NUMA init methods.
Initialization of the masks and building node_possible_map are now
handled commonly by initmem_init().

dummy_numa_init() is updated to set node 0 on both masks.  While at
it, move the info messages from scan to init.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:07 +01:00
Tejun Heo
ffe77a4605 x86-64, NUMA: Restructure initmem_init()
Reorganize initmem_init() such that,

* Different NUMA init methods are iterated in a consistent way.

* Each iteration re-initializes all the parameters and different
  method can be tried after a failure.

* Dummy init is handled the same as other methods.

Apart from how retry after failure, this patch doesn't change the
behavior.  The call sequences are kept equivalent across the
conversion.

After the change, bad_srat() doesn't need to clear apic to node
mapping or worry about numa_off.  Simplified accordingly.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Tejun Heo
d8fc3afc49 x86, NUMA: Move *_numa_init() invocations into initmem_init()
There's no reason for these to live in setup_arch().  Move them inside
initmem_init().

- v2: x86-32 initmem_init() weren't updated breaking 32bit builds.
  Fixed.  Found by Ankita.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ankita Garg <ankita@in.ibm.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Tejun Heo
a9aec56afa x86-64, NUMA: Wrap acpi_numa_init() so that failure can be indicated by return value
Because of the way ACPI tables are parsed, the generic
acpi_numa_init() couldn't return failure when error was detected by
arch hooks.  Instead, the failure state was recorded and later arch
dependent init hook - acpi_scan_nodes() - would fail.

Wrap acpi_numa_init() with x86_acpi_numa_init() so that failure can be
indicated as return value immediately.  This is in preparation for
further NUMA init cleanups.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Tejun Heo
940fed2e79 x86-64, NUMA: Unify {acpi|amd}_{numa_init|scan_nodes}() arguments and return values
The functions used during NUMA initialization - *_numa_init() and
*_scan_nodes() - have different arguments and return values.  Unify
them such that they all take no argument and return 0 on success and
-errno on failure.  This is in preparation for further NUMA init
cleanups.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Tejun Heo
86ef4dbf1f x86, NUMA: Drop @start/last_pfn from initmem_init()
initmem_init() extensively accesses and modifies global data
structures and the parameters aren't even followed depending on which
path is being used.  Drop @start/last_pfn and let it deal with
@max_pfn directly.  This is in preparation for further NUMA init
cleanups.

- v2: x86-32 initmem_init() weren't updated breaking 32bit builds.
  Fixed.  Found by Yinghai.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Tejun Heo
13081df5dd x86-64, NUMA: Simplify hotplug node handling in acpi_numa_memory_affinity_init()
Hotplug node handling in acpi_numa_memory_affinity_init() was
unnecessarily complicated with storing the original nodes[] entry and
restoring it afterwards.  Simplify it by not modifying the nodes[]
entry for hotplug nodes from the beginning.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Tejun Heo
7d36b7bc90 x86-64, NUMA: Make dummy node initialization path similar to non-dummy ones
Dummy node initialization in initmem_init() didn't initialize apicid
to node mapping and set cpu to node mapping directly by caling
numa_set_node(), which is different from non-dummy init paths.

Update it such that they behave similarly.  Initialize apicid to node
mapping and call numa_init_array().  The actual cpu to node mapping is
handled by init_cpu_to_node() later.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
2011-02-16 12:13:06 +01:00
Ingo Molnar
275a88d3cf Merge branch 'x86/amd-nb' into x86/mm
Merge reason: consolidate it into the more generic x86/mm tree to prevent conflicts
              with ongoing NUMA work.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 09:45:47 +01:00
Ingo Molnar
52b8b8d725 Merge branch 'x86/numa' into x86/mm
Merge reason: consolidate it into the more generic x86/mm tree to prevent conflicts.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 09:44:15 +01:00
Ingo Molnar
02ac81a812 Merge branch 'x86/bootmem' into x86/mm
Merge reason: the topic is ready - consolidate it into the more generic x86/mm tree
              and prevent conflicts.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-16 09:43:54 +01:00
Jesper Juhl
fc9044e2db crypto: aesni-intel - Fix remaining leak in rfc4106_set_hash_key
Fix up previous patch that failed to properly fix mem leak in 
rfc4106_set_hash_subkey(). This add-on patch; fixes the leak. moves 
kfree() out of the error path, returns -ENOMEM rather than -EINVAL when 
ablkcipher_request_alloc() fails.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2011-02-16 13:04:09 +11:00
Linus Torvalds
1cecd791f2 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Fix text_poke_smp_batch() deadlock
  perf tools: Fix thread_map event synthesizing in top and record
  watchdog, nmi: Lower the severity of error messages
  ARM: oprofile: Fix backtraces in timer mode
  oprofile: Fix usage of CONFIG_HW_PERF_EVENTS for oprofile_perf_init and friends
2011-02-15 10:18:48 -08:00
Linus Torvalds
fef86db8fe Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/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, dmi, debug: Log board name (when present) in dmesg/oops output
  x86, ioapic: Don't warn about non-existing IOAPICs if we have none
  x86: Fix mwait_usable section mismatch
  x86: Readd missing irq_to_desc() in fixup_irq()
  x86: Fix section mismatch in LAPIC initialization
2011-02-15 10:18:29 -08:00
Jiri Kosina
0a9d59a246 Merge branch 'master' into for-next 2011-02-15 10:24:31 +01:00
Naga Chumbalkar
84e383b322 x86, dmi, debug: Log board name (when present) in dmesg/oops output
The "Type 2" SMBIOS record that contains Board Name is not
strictly required and may be absent in the SMBIOS on some
platforms.

( Please note that Type 2 is not listed in Table 3 in Sec 6.2
  ("Required Structures and Data") of the SMBIOS v2.7
  Specification. )

Use the Manufacturer Name (aka System Vendor) name.
Print Board Name only when it is present.

Before the fix:
  (i) dmesg output: DMI: /ProLiant DL380 G6, BIOS P62 01/29/2011
 (ii) oops output:  Pid: 2170, comm: bash Not tainted 2.6.38-rc4+  /ProLiant DL380 G6

After the fix:
  (i) dmesg output: DMI: HP ProLiant DL380 G6, BIOS P62 01/29/2011
 (ii) oops output:  Pid: 2278, comm: bash Not tainted 2.6.38-rc4+  HP ProLiant DL380 G6

Signed-off-by: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Reviewed-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: <stable@kernel.org> # .3x - good for debugging, please apply as far back as it applies cleanly
LKML-Reference: <20110214224423.2182.13929.sendpatchset@nchumbalkar.americas.hpqcorp.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-15 04:20:57 +01:00
Paul Bolle
678301ecad x86, ioapic: Don't warn about non-existing IOAPICs if we have none
mp_find_ioapic() prints errors like:

    ERROR: Unable to locate IOAPIC for GSI 13

if it can't find the IOAPIC that manages that specific GSI. I
see errors like that at every boot of a laptop that apparently
doesn't have any IOAPICs.

But if there are no IOAPICs it doesn't seem to be an error that
none can be found. A solution that gets rid of this message is
to directly return if nr_ioapics (still) is zero. (But keep
returning -1 in that case, so nothing breaks from this change.)

The call chain that generates this error is:

pnpacpi_allocated_resource()
    case ACPI_RESOURCE_TYPE_IRQ:
        pnpacpi_parse_allocated_irqresource()
            acpi_get_override_irq()
                 mp_find_ioapic()

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-15 04:15:04 +01:00
Borislav Petkov
9e81509efc x86, amd: Initialize variable properly
Commit d518573de6 ("x86, amd: Normalize compute unit IDs on
multi-node processors") introduced compute unit normalization
but causes a compiler warning:

 arch/x86/kernel/cpu/amd.c: In function 'amd_detect_cmp':
 arch/x86/kernel/cpu/amd.c:268: warning: 'cores_per_cu' may be used uninitialized in this function
 arch/x86/kernel/cpu/amd.c:268: note: 'cores_per_cu' was declared here

The compiler is right - initialize it with a proper value.

Also, fix up a comment while at it.

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <20110214171451.GB10076@kryptos.osrc.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-15 03:03:19 +01:00
Feng Tang
168202c7bf mrst/vrtc: Avoid using cmos rtc ops
If we don't assign Moorestown specific wallclock init and ops function
the rtc/persisent clock code will use cmos rtc for access, this will
crash Moorestown in that the ioports are not present.

Also in vrtc driver, should avoid using cmos access to check UIP status.

[feng.tang@intel.com: use set_fixmap_offset_nocache() to simplify code]
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-14 18:20:43 +01:00
Feng Tang
6b617e224d x86/platform: Add a wallclock_init func to x86_init.timers ops
Some wall clock devices use MMIO based HW register, this new
function will give them a chance to do some initialization work
before their get/set_time service get called, which is usually
in early kernel boot phase.

Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-14 18:20:43 +01:00
David Rientjes
14392fd329 x86, numa: Add error handling for bad cpu-to-node mappings
CONFIG_DEBUG_PER_CPU_MAPS may return NUMA_NO_NODE when an
early_cpu_to_node() mapping hasn't been initialized.  In such a
case, it emits a warning and continues without an issue but
callers may try to use the return value to index into an array.

We can catch those errors and fail silently since a warning has
already been emitted.  No current user of numa_add_cpu()
requires this error checking to avoid a crash, but it's better
to be proactive in case a future user happens to have a bug and
a user tries to diagnose it with CONFIG_DEBUG_PER_CPU_MAPS.

Reported-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Tejun Heo <tj@kernel.org>
LKML-Reference: <alpine.DEB.2.00.1102071407250.7812@chino.kir.corp.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:29:27 +01:00
Ingo Molnar
b366801c95 Merge commit 'v2.6.38-rc4' into x86/numa
Merge reason: Merge latest fixes before applying new patch.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:28:31 +01:00
Yinghai Lu
e5fea868e6 x86: Fix and clean up generic_processor_info()
One of the error printouts in generic_processor_info() prints out
the APIC version instead of the cpu index the warning text describes.

Move version validation down, after we get the right cpu index.

-v2: add comments about reason why we can have cpu=0 there.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4D5240A9.4080703@kernel.org>
[ Cleaned up and made the BIOS bug printouts more consistent ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:23:51 +01:00
Ingo Molnar
91e04ec058 Merge commit 'v2.6.38-rc4' into x86/cpu
Merge reason: pick up the latest fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:18:56 +01:00
Kamal Mostafa
9a6d44b9ad x86: Emit "mem=nopentium ignored" warning when not supported
Emit warning when "mem=nopentium" is specified on any arch other
than x86_32 (the only that arch supports it).

Signed-off-by: Kamal Mostafa <kamal@canonical.com>
BugLink: http://bugs.launchpad.net/bugs/553464
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
LKML-Reference: <1296783486-23033-2-git-send-email-kamal@canonical.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
2011-02-14 13:15:43 +01:00
Kamal Mostafa
77eed821ac x86: Fix panic when handling "mem={invalid}" param
Avoid removing all of memory and panicing when "mem={invalid}"
is specified, e.g. mem=blahblah, mem=0, or mem=nopentium (on
platforms other than x86_32).

Signed-off-by: Kamal Mostafa <kamal@canonical.com>
BugLink: http://bugs.launchpad.net/bugs/553464
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: <stable@kernel.org> # .3x: as far back as it applies
LKML-Reference: <1296783486-23033-1-git-send-email-kamal@canonical.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:15:43 +01:00
Shaohua Li
7064d865af x86: Avoid tlbstate lock if not enough cpus
This one isn't related to previous patch. If online cpus are
below NUM_INVALIDATE_TLB_VECTORS, we don't need the lock. The
comments in the code declares we don't need the check, but a hot
lock still needs an atomic operation and expensive, so add the
check here.

Uses nr_cpu_ids here as suggested by Eric Dumazet.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andi Kleen <andi@firstfloor.org>
LKML-Reference: <1295232730.1949.710.camel@sli10-conroe>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:03:08 +01:00
Shaohua Li
70e4a36973 x86: Scale up the number of TLB invalidate vectors with NR_CPUs, up to 32
Make the maxium TLB invalidate vectors depend on NR_CPUS linearly,
with a maximum of 32 vectors.

We currently only have 8 vectors for TLB invalidation and that is clearly
inadequate. If we have a lot of CPUs, the CPUs need share the 8 vectors and
tlbstate_lock is used to protect them. flush_tlb_page() is
heavily used in page reclaim, which will cause a lot of lock
contention for tlbstate_lock.

Andi Kleen suggested increasing the vectors number to 32, which should be
good for current typical systems to reduce the tlbstate_lock contention.

My test system has 4 sockets and 64G memory, and 64 CPUs. My
workload creates 64 processes. Each process mmap reads a big
empty sparse file. The total size of the files are 2*total_mem,
so this will cause a lot of page reclaim.

Below is the result I get from perf call-graph profiling:

 without the patch:
 ------------------

    24.25%           usemem  [kernel]                                   [k] _raw_spin_lock
                     |
                     --- _raw_spin_lock
                        |
                        |--42.15%-- native_flush_tlb_others

 with the patch:
 ------------------

    14.96%           usemem  [kernel]                                   [k] _raw_spin_lock
                     |
                     --- _raw_spin_lock
                        |--13.89%-- native_flush_tlb_others

So this heavily reduces the tlbstate_lock contention.

Suggested-by: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1295232727.1949.709.camel@sli10-conroe>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:03:08 +01:00
Shaohua Li
3a09fb4570 x86: Allocate 32 tlb_invalidate_interrupt handler stubs
Add up to 32 invalidate_interrupt handlers. How many handlers are
added depends on NUM_INVALIDATE_TLB_VECTORS. So if
NUM_INVALIDATE_TLB_VECTORS is smaller than 32, we reduce code
size.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
LKML-Reference: <1295232725.1949.708.camel@sli10-conroe>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:03:08 +01:00
Shaohua Li
60f6e65d78 x86: Cleanup vector usage
Cleanup the vector usage and make them continuous if possible.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
LKML-Reference: <1295232722.1949.707.camel@sli10-conroe>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 13:03:07 +01:00
Borislav Petkov
1c9d16e359 x86: Fix mwait_usable section mismatch
We use it in non __cpuinit code now too so drop marker.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <20110211171754.GA21047@aftab>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 12:08:28 +01:00
Ingo Molnar
d2137d5af4 Merge branch 'linus' into x86/bootmem
Conflicts:
	arch/x86/mm/numa_64.c

Merge reason: fix the conflict, update to latest -rc and pick up this
              dependent fix from Yinghai:

  e6d2e2b2b1: memblock: don't adjust size in memblock_find_base()

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-14 11:55:18 +01:00
Thomas Gleixner
5117348dea x86: Readd missing irq_to_desc() in fixup_irq()
commit a3c08e5d(x86: Convert irq_chip access to new functions)
accidentally zapped desc = irq_to_desc(irq); in the vector loop.
So we lock some random irq descriptor.

Add it back.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@kernel.org> # .37
2011-02-12 11:56:22 +01:00
Peter Zijlstra
d91309f69b x86: Fix text_poke_smp_batch() deadlock
Fix this deadlock - we are already holding the mutex:

=======================================================
[ INFO: possible circular locking dependency detected ] 2.6.38-rc4-test+ 
-------------------------------------------------------
bash/1850 is trying to acquire lock:
 (text_mutex){+.+.+.}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f

but task is already holding lock:
 (smp_alt){+.+...}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

->  (smp_alt){+.+...}:
       [<ffffffff81082d02>] lock_acquire+0xcd/0xf8
       [<ffffffff8192e119>] __mutex_lock_common+0x4c/0x339
       [<ffffffff8192e4ca>] mutex_lock_nested+0x3e/0x43
       [<ffffffff8101050f>] alternatives_smp_switch+0x77/0x1d8
       [<ffffffff81926a6f>] do_boot_cpu+0xd7/0x762
       [<ffffffff819277dd>] native_cpu_up+0xe6/0x16a
       [<ffffffff81928e28>] _cpu_up+0x9d/0xee
       [<ffffffff81928f4c>] cpu_up+0xd3/0xe7
       [<ffffffff82268d4b>] kernel_init+0xe8/0x20a
       [<ffffffff8100ba24>] kernel_thread_helper+0x4/0x10

->  (cpu_hotplug.lock){+.+.+.}:
       [<ffffffff81082d02>] lock_acquire+0xcd/0xf8
       [<ffffffff8192e119>] __mutex_lock_common+0x4c/0x339
       [<ffffffff8192e4ca>] mutex_lock_nested+0x3e/0x43
       [<ffffffff810568cc>] get_online_cpus+0x41/0x55
       [<ffffffff810a1348>] stop_machine+0x1e/0x3e
       [<ffffffff819314c1>] text_poke_smp_batch+0x3a/0x3c
       [<ffffffff81932b6c>] arch_optimize_kprobes+0x10d/0x11c
       [<ffffffff81933a51>] kprobe_optimizer+0x152/0x222
       [<ffffffff8106bb71>] process_one_work+0x1d3/0x335
       [<ffffffff8106cfae>] worker_thread+0x104/0x1a4
       [<ffffffff810707c4>] kthread+0x9d/0xa5
       [<ffffffff8100ba24>] kernel_thread_helper+0x4/0x10

->  (text_mutex){+.+.+.}:

other info that might help us debug this:

6 locks held by bash/1850:
 :  (&buffer->mutex){+.+.+.}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f
 :  (s_active#75){.+.+.+}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f
 :  (x86_cpu_hotplug_driver_mutex){+.+.+.}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f
 :  (cpu_add_remove_lock){+.+.+.}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f
 :  (cpu_hotplug.lock){+.+.+.}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f
 :  (smp_alt){+.+...}, at: [<ffffffff8100a9c1>] return_to_handler+0x0/0x2f

stack backtrace:
Pid: 1850, comm: bash Not tainted 2.6.38-rc4-test+ 
Call Trace:

 [<ffffffff81080eb2>] print_circular_bug+0xa8/0xb7
 [<ffffffff8192e4ca>] mutex_lock_nested+0x3e/0x43
 [<ffffffff81010302>] alternatives_smp_unlock+0x3d/0x93
 [<ffffffff81010630>] alternatives_smp_switch+0x198/0x1d8
 [<ffffffff8102568a>] native_cpu_die+0x65/0x95
 [<ffffffff818cc4ec>] _cpu_down+0x13e/0x202
 [<ffffffff8117a619>] sysfs_write_file+0x108/0x144
 [<ffffffff8111f5a2>] vfs_write+0xac/0xff
 [<ffffffff8111f7a9>] sys_write+0x4a/0x6e

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: mathieu.desnoyers@efficios.com
Cc: rusty@rustcorp.com.au
Cc: ananth@in.ibm.com
Cc: masami.hiramatsu.pt@hitachi.com
Cc: fweisbec@gmail.com
Cc: jbeulich@novell.com
Cc: jbaron@redhat.com
Cc: mhiramat@redhat.com
LKML-Reference: <1297458466.5226.93.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-12 02:34:34 +01:00
Ingo Molnar
3e86858133 Merge commit 'v2.6.38-rc4' into perf/core
Merge reason: pick up the latest fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-12 02:24:25 +01:00
Linus Torvalds
3c6c0d6ca3 Merge branch 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.38' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: SVM: Make sure KERNEL_GS_BASE is valid when loading gs_index
2011-02-11 16:30:09 -08:00
Ian Campbell
44b46c3ef8 xen: annotate functions which only call into __init at start of day
Both xen_hvm_init_shared_info and xen_build_mfn_list_list can be
called at resume time as well as at start of day but only reference
__init functions (extend_brk) at start of day. Hence annotate with
__ref.

    WARNING: arch/x86/built-in.o(.text+0x4f1): Section mismatch in reference
        from the function xen_hvm_init_shared_info() to the function
        .init.text:extend_brk()
    The function xen_hvm_init_shared_info() references
    the function __init extend_brk().
    This is often because xen_hvm_init_shared_info lacks a __init
    annotation or the annotation of extend_brk is wrong.

xen_hvm_init_shared_info calls extend_brk() iff !shared_info_page and
initialises shared_info_page with the result. This happens at start of
day only.

    WARNING: arch/x86/built-in.o(.text+0x599b): Section mismatch in reference
        from the function xen_build_mfn_list_list() to the function
        .init.text:extend_brk()
    The function xen_build_mfn_list_list() references
    the function __init extend_brk().
    This is often because xen_build_mfn_list_list lacks a __init
    annotation or the annotation of extend_brk is wrong.

(this warning occurs multiple times)

xen_build_mfn_list_list only calls extend_brk() at boot time, while
building the initial mfn list list

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-11 14:46:34 -05:00
Ian Campbell
6b08cfebd3 xen p2m: annotate variable which appears unused
CC      arch/x86/xen/p2m.o
arch/x86/xen/p2m.c: In function 'm2p_remove_override':
arch/x86/xen/p2m.c:460: warning: 'address' may be used uninitialized in this function
arch/x86/xen/p2m.c: In function 'm2p_add_override':
arch/x86/xen/p2m.c:426: warning: 'address' may be used uninitialized in this function

In actual fact address is inialised in one "if (!PageHighMem(page))"
statement and used in a second and so is always initialised before
use.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-02-11 14:46:25 -05:00
Paul Bolle
45e8234cad x86: Fix printk typo WARING
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-02-11 15:17:24 +01:00
Jan Beulich
691269f0d9 x86: Adjust section placement in AMD northbridge related code
amd_nb_misc_ids[] can live in .rodata, and enable_pci_io_ecs()
can be moved into .cpuinit.text.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: Andreas Herrmann <Andreas.Herrmann3@amd.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <4D525DDD0200007800030F07@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-10 13:32:52 +01:00
Jan Beulich
b82fef82d5 x86: Partly unify asm-offsets_{32,64}.c
Just consolidating the common parts. Full unification would seem
straight forward, but it's not clear the necessary #ifdef-s would
be acceptable.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4D525D520200007800030EE9@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-10 13:31:37 +01:00
Jan Beulich
94d1ac8b55 x86: Reduce back the alignment of the per-CPU data section
This complements commit:

  47f19a0814: percpu: Remove the multi-page alignment facility

reverting one leftover of:

  fe8e0c25ca: x86, 32-bit: Align percpu area and irq stacks to THREAD_SIZE

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Alexander van Heukelum <heukelum@fastmail.fm>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4D525CE60200007800030EE5@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Alexander van Heukelum <heukelum@fastmail.fm>
2011-02-10 13:31:36 +01:00
Jan Beulich
2fb270f321 x86: Fix section mismatch in LAPIC initialization
Additionally doing things conditionally upon smp_processor_id()
being zero is generally a bad idea, as this means CPU 0 cannot
be offlined and brought back online later again.

While there may be other places where this is done, I think adding
more of those should be avoided so that some day SMP can really
become "symmetrical".

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
LKML-Reference: <4D525C7E0200007800030EE1@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-10 13:26:53 +01:00
Borislav Petkov
44d60c0f5c x86, microcode, AMD: Extend ucode size verification
The different families have a different max size for the ucode patch,
adjust size checking to the family we're running on. Also, do not
vzalloc the max size of the ucode but only the actual size that is
passed on from the firmware loader.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
2011-02-10 12:24:03 +01:00
Joerg Roedel
893a5ab6ee KVM: SVM: Make sure KERNEL_GS_BASE is valid when loading gs_index
The gs_index loading code uses the swapgs instruction to
switch to the user gs_base temporarily. This is unsave in an
lightweight exit-path in KVM on AMD because the
KERNEL_GS_BASE MSR is switches lazily. An NMI happening in
the critical path of load_gs_index may use the wrong GS_BASE
value then leading to unpredictable behavior, e.g. a
triple-fault.

This patch fixes the issue by making sure that load_gs_index
is called only with a valid KERNEL_GS_BASE value loaded in
KVM.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-02-09 18:31:36 +02:00
Borislav Petkov
258721ef34 x86, microcode, AMD: Cleanup dmesg output
Unify pr_* to use pr_fmt, shorten messages, correct type formatting.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>
2011-02-09 16:05:36 +01:00
Borislav Petkov
05ff02e4c0 x86, microcode, AMD: Remove unneeded memset call
collect_cpu_info_amd() clears its csig arg but this is done in the
microcode_core's collect_cpu_info() by clearing the embedding struct
ucode_cpu_info. Drop it.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>
2011-02-09 16:05:35 +01:00
Borislav Petkov
7cc27349cb x86, microcode, AMD: Simplify get_next_ucode
Do not copy the section header but look at it directly through the
pointer. Also, make it return a ptr to a ucode header directly
thus dropping a bunch of unneeded casts. Finally, simplify
generic_load_microcode(), while at it.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>
2011-02-09 16:05:34 +01:00
Borislav Petkov
10de52d665 x86, microcode, AMD: Simplify install_equiv_cpu_table
There's no need to memcpy the ucode header in order to look at it only
in this function - use the original buffer instead. Also, fix return
type semantics by returning a negative value on error and a positive
otherwise.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>
2011-02-09 16:05:33 +01:00
Borislav Petkov
ffc7e8ac82 x86, microcode, AMD: Release firmware on error
When the ucode magic is wrong, for whatever reason, we don't release the
loaded firmware binary and its related resources. Make sure we do. Also,
fix function naming to fit this driver's convention and shorten variable
names.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>
2011-02-09 16:05:32 +01:00
Borislav Petkov
6c53cbfced x86, microcode: Correct sysdev_add error path
When we encounter an error while initting the microcode driver on a CPU,
we must undo the previously added sysfs group.

Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Andreas Herrmann <Andreas.Herrmann3@amd.com>
2011-02-09 16:05:31 +01:00
Seth Heasley
c13ff2ff3a PCI/lpc: irq and pci_ids patch for Intel DH89xxCC DeviceIDs
This patch adds the LPC Controller DeviceIDs for the Intel DH89xxCC PCH.

The code for capturing ranges of LPC Controller DeviceIDs has also been updated.

Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Seth Heasley <seth.heasley@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-02-08 13:08:05 -08:00
Hans Rosenfeld
cabb5bd7ff x86, amd: Support L3 Cache Partitioning on AMD family 0x15 CPUs
L3 Cache Partitioning allows selecting which of the 4 L3 subcaches can be used
for evictions by the L2 cache of each compute unit. By writing a 4-bit
hexadecimal mask into the the sysfs file
/sys/devices/system/cpu/cpuX/cache/index3/subcaches, the user can set the
enabled subcaches for a CPU.

The settings are directly read from and written to the hardware, so there is no
way to have contradicting settings for two CPUs belonging to the same compute
unit. Writing will always overwrite any previous setting for a compute unit.

Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: <Andreas.Herrmann3@amd.com>
LKML-Reference: <1297098639-431383-1-git-send-email-hans.rosenfeld@amd.com>
[ -v3: minor style fixes ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-07 19:16:22 +01:00
H. Peter Anvin
d344e38b2c x86, nx: Mark the ACPI resume trampoline code as +x
We reserve lowmem for the things that need it, like the ACPI
wakeup code, way early to guarantee availability.  This happens
before we set up the proper pagetables, so set_memory_x() has no
effect.

Until we have a better solution, use an initcall to mark the
wakeup code executable.

Originally-by: Matthieu Castet <castet.matthieu@free.fr>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Matthias Hopf <mhopf@suse.de>
Cc: rjw@sisk.pl
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <4D4F8019.2090104@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-07 09:07:13 +01:00
Ingo Molnar
c7f9a6f377 Merge branch 'linus' into perf/core
Merge reason: Pick up perf fixes that are now upstream

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-07 08:44:26 +01:00
Linus Torvalds
07675f484b Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/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:
  x86-32: Make sure the stack is set up before we use it
  x86, mtrr: Avoid MTRR reprogramming on BP during boot on UP platforms
  x86, nx: Don't force pages RW when setting NX bits
2011-02-06 12:03:10 -08:00
H. Peter Anvin
11d4c3f9b6 x86-32: Make sure the stack is set up before we use it
Since checkin ebba638ae7 we call
verify_cpu even in 32-bit mode.  Unfortunately, calling a function
means using the stack, and the stack pointer was not initialized in
the 32-bit setup code!  This code initializes the stack pointer, and
simplifies the interface slightly since it is easier to rely on just a
pointer value rather than a descriptor; we need to have different
values for the segment register anyway.

This retains start_stack as a virtual address, even though a physical
address would be more convenient for 32 bits; the 64-bit code wants
the other way around...

Reported-by: Matthieu Castet <castet.matthieu@free.fr>
LKML-Reference: <4D41E86D.8060205@free.fr>
Tested-by: Kees Cook <kees.cook@canonical.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-02-04 22:27:28 -08:00
Nathan Fontenot
1dc41aa6d6 memory hotplug: Define memory_block_size_bytes for x86_64 with CONFIG_X86_UV
Define a version of memory_block_size_bytes for x86_64 when CONFIG_X86_UV is
set.

Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-03 16:08:58 -08:00
Suresh Siddha
831d52bc15 x86, mm: avoid possible bogus tlb entries by clearing prev mm_cpumask after switching mm
Clearing the cpu in prev's mm_cpumask early will avoid the flush tlb
IPI's while the cr3 is still pointing to the prev mm.  And this window
can lead to the possibility of bogus TLB fills resulting in strange
failures.  One such problematic scenario is mentioned below.

 T1. CPU-1 is context switching from mm1 to mm2 context and got a NMI
     etc between the point of clearing the cpu from the mm_cpumask(mm1)
     and before reloading the cr3 with the new mm2.

 T2. CPU-2 is tearing down a specific vma for mm1 and will proceed with
     flushing the TLB for mm1.  It doesn't send the flush TLB to CPU-1
     as it doesn't see that cpu listed in the mm_cpumask(mm1).

 T3. After the TLB flush is complete, CPU-2 goes ahead and frees the
     page-table pages associated with the removed vma mapping.

 T4. CPU-2 now allocates those freed page-table pages for something
     else.

 T5. As the CR3 and TLB caches for mm1 is still active on CPU-1, CPU-1
     can potentially speculate and walk through the page-table caches
     and can insert new TLB entries.  As the page-table pages are
     already freed and being used on CPU-2, this page walk can
     potentially insert a bogus global TLB entry depending on the
     (random) contents of the page that is being used on CPU-2.

 T6. This bogus TLB entry being global will be active across future CR3
     changes and can result in weird memory corruption etc.

To avoid this issue, for the prev mm that is handing over the cpu to
another mm, clear the cpu from the mm_cpumask(prev) after the cr3 is
changed.

Marking it for -stable, though we haven't seen any reported failure that
can be attributed to this.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: stable@kernel.org	[v2.6.32+]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-02-03 13:32:39 -08:00
Linus Torvalds
eb487ab4d5 Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf: Fix reading in perf_event_read()
  watchdog: Don't change watchdog state on read of sysctl
  watchdog: Fix sysctl consistency
  watchdog: Fix broken nowatchdog logic
  perf: Fix Pentium4 raw event validation
  perf: Fix alloc_callchain_buffers()
2011-02-03 08:52:05 -08:00
Suresh Siddha
f7448548a9 x86, mtrr: Avoid MTRR reprogramming on BP during boot on UP platforms
Markus Kohn ran into a hard hang regression on an acer aspire
1310, when acpi is enabled. git bisect showed the following
commit as the bad one that introduced the boot regression.

	commit d0af9eed5a
	Author: Suresh Siddha <suresh.b.siddha@intel.com>
	Date:   Wed Aug 19 18:05:36 2009 -0700

	    x86, pat/mtrr: Rendezvous all the cpus for MTRR/PAT init

Because of the UP configuration of that platform,
native_smp_prepare_cpus() bailed out (in smp_sanity_check())
before doing the set_mtrr_aps_delayed_init()

Further down the boot path, native_smp_cpus_done() will call the
delayed MTRR initialization for the AP's (mtrr_aps_init()) with
mtrr_aps_delayed_init not set. This resulted in the boot
processor reprogramming its MTRR's to the values seen during the
start of the OS boot. While this is not needed ideally, this
shouldn't have caused any side-effects. This is because the
reprogramming of MTRR's (set_mtrr_state() that gets called via
set_mtrr()) will check if the live register contents are
different from what is being asked to write and will do the actual
write only if they are different.

BP's mtrr state is read during the start of the OS boot and
typically nothing would have changed when we ask to reprogram it
on BP again because of the above scenario on an UP platform. So
on a normal UP platform no reprogramming of BP MTRR MSR's
happens and all is well.

However, on this platform, bios seems to be modifying the fixed
mtrr range registers between the start of OS boot and when we
double check the live registers for reprogramming BP MTRR
registers. And as the live registers are modified, we end up
reprogramming the MTRR's to the state seen during the start of
the OS boot.

During ACPI initialization, something in the bios (probably smi
handler?) don't like this fact and results in a hard lockup.

We didn't see this boot hang issue on this platform before the
commit d0af9eed5a, because only
the AP's (if any) will program its MTRR's to the value that BP
had at the start of the OS boot.

Fix this issue by checking mtrr_aps_delayed_init before
continuing further in the mtrr_aps_init(). Now, only AP's (if
any) will program its MTRR's to the BP values during boot.

Addresses https://bugzilla.novell.com/show_bug.cgi?id=623393

  [ By the way, this behavior of the bios modifying MTRR's after the start
    of the OS boot is not common and the kernel is not prepared to
    handle this situation well. Irrespective of this issue, during
    suspend/resume, linux kernel will try to reprogram the BP's MTRR values
    to the values seen during the start of the OS boot. So suspend/resume might
    be already broken on this platform for all linux kernel versions. ]

Reported-and-bisected-by: Markus Kohn <jabber@gmx.org>
Tested-by: Markus Kohn <jabber@gmx.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Thomas Renninger <trenn@novell.com>
Cc: Rafael Wysocki <rjw@novell.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: stable@kernel.org # [v2.6.32+]
LKML-Reference: <1296694975.4418.402.camel@sbsiddha-MOBL3.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-03 12:10:38 +01:00
Matthieu CASTET
f12d3d04e8 x86, nx: Don't force pages RW when setting NX bits
Xen want page table pages read only.

But the initial page table (from head_*.S) live in .data or .bss.

That was broken by 64edc8ed5f.  There is
absolutely no reason to force these pages RW after they have already
been marked RO.

Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-02-02 16:02:36 -08:00
Richard Cochran
ce26efdefa x86: Add clock_adjtime for x86
This patch adds the clock_adjtime system call to the x86 architecture.

Signed-off-by: Richard Cochran <richard.cochran@omicron.at>
Acked-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <20110201134419.968905083@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-02-02 15:28:19 +01:00
Ingo Molnar
8104a4775a Merge commit 'v2.6.38-rc3' into perf/core
Merge reason: Pick up latest fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-02-02 07:10:06 +01:00
Tejun Heo
eff9073790 x86: Rename incorrectly named parameter of numa_cpu_node()
numa_cpu_node() prototype in numa_32.h has wrongly named
parameter @apicid when it actually takes the CPU number.

Change it to @cpu.

Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
LKML-Reference: <20110131155905.GM7459@htj.dyndns.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-31 18:22:25 +01:00
Thomas Gleixner
51563cd53c Merge branch 'tip/rtmutex' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into core/locking
*git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace tip/rtmutex:
   rtmutex: Simplify PI algorithm and make highest prio task get lock
2011-01-31 15:09:14 +01:00
Tejun Heo
4e62445b90 x86: Fix build failure on X86_UP_APIC
Commit 4c321ff8 (x86: Replace cpu_2_logical_apicid[] with early
percpu variable) and following changes introduced and used
x86_cpu_to_logical_apicid percpu variable.  It was declared and
defined inside CONFIG_SMP && CONFIG_X86_32 but if
CONFIG_X86_UP_APIC is set UP configuration makes use of it and
build fails.

Fix it by declaring and defining it inside CONFIG_X86_LOCAL_APIC
&& CONFIG_X86_32.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <20110128162248.GA25746@htj.dyndns.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 17:24:49 +01:00
Tejun Heo
8db78cc4b4 x86: Unify NUMA initialization between 32 and 64bit
Now that everything else is unified, NUMA initialization can be
unified too.

* numa_init_array() and init_cpu_to_node() are moved from
  numa_64 to numa.

* numa_32::initmem_init() is updated to call numa_init_array()
  and setup_arch() to call init_cpu_to_node() on 32bit too.

* x86_cpu_to_node_map is now initialized to NUMA_NO_NODE on
  32bit too. This is safe now as numa_init_array() will initialize
  it early during boot.

This makes NUMA mapping fully initialized before
setup_per_cpu_areas() on 32bit too and thus makes the first
percpu chunk which contains all the static variables and some of
dynamic area allocated with NUMA affinity correctly considered.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-17-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
2011-01-28 14:54:10 +01:00
Tejun Heo
de2d9445f1 x86: Unify node_to_cpumask_map handling between 32 and 64bit
x86_32 has been managing node_to_cpumask_map explicitly from
map_cpu_to_node() and friends in a rather ugly way.  With
previous changes, it's now possible to share the code with
64bit.

* When CONFIG_NUMA_EMU is disabled, numa_add/remove_cpu() are
  implemented in numa.c and shared by 32 and 64bit.  CONFIG_NUMA_EMU
  versions still live in numa_64.c.

  NUMA_EMU's dependency on 64bit is planned to be removed and the
  above should go away together.

* identify_cpu() now calls numa_add_cpu() for 32bit too.  This
  makes the explicit mask management from map_cpu_to_node() unnecessary.

* The whole x86_32 specific map_cpu_to_node() chunk is no longer
  necessary.  Dropped.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-16-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: David Rientjes <rientjes@google.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
2011-01-28 14:54:10 +01:00
Tejun Heo
645a79195f x86: Unify CPU -> NUMA node mapping between 32 and 64bit
Unlike 64bit, 32bit has been using its own cpu_to_node_map[] for
CPU -> NUMA node mapping.  Replace it with early_percpu variable
x86_cpu_to_node_map and share the mapping code with 64bit.

* USE_PERCPU_NUMA_NODE_ID is now enabled for 32bit too.

* x86_cpu_to_node_map and numa_set/clear_node() are moved from
  numa_64 to numa.  For now, on 32bit, x86_cpu_to_node_map is initialized
  with 0 instead of NUMA_NO_NODE.  This is to avoid introducing unexpected
  behavior change and will be updated once init path is unified.

* srat_detect_node() is now enabled for x86_32 too.  It calls
  numa_set_node() and initializes the mapping making explicit
  cpu_to_node_map[] updates from map/unmap_cpu_to_node() unnecessary.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-15-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: David Rientjes <rientjes@google.com>
2011-01-28 14:54:09 +01:00
Tejun Heo
bbc9e2f452 x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit
The mapping between cpu/apicid and node is done via
apicid_to_node[] on 64bit and apicid_2_node[] +
apic->x86_32_numa_cpu_node() on 32bit. This difference makes it
difficult to further unify 32 and 64bit NUMA handling.

This patch unifies it by replacing both apicid_to_node[] and
apicid_2_node[] with __apicid_to_node[] array, which is accessed
by two accessors - set_apicid_to_node() and numa_cpu_node().  On
64bit, numa_cpu_node() always consults __apicid_to_node[]
directly while 32bit goes through apic->numa_cpu_node() method
to allow apic implementations to override it.

srat_detect_node() for amd cpus contains workaround for broken
NUMA configuration which assumes relationship between APIC ID,
HT node ID and NUMA topology.  Leave it to access
__apicid_to_node[] directly as mapping through CPU might result
in undesirable behavior change.  The comment is reformatted and
updated to note the ugliness.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-14-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: David Rientjes <rientjes@google.com>
2011-01-28 14:54:09 +01:00
Tejun Heo
89e5dc218e x86: Replace apic->apicid_to_node() with ->x86_32_numa_cpu_node()
apic->apicid_to_node() is 32bit specific apic operation which
determines NUMA node for a CPU.  Depending on the APIC
implementation, it can be easier to determine NUMA node from
either physical or logical apicid.  Currently,
->apicid_to_node() takes @logical_apicid and calls
hard_smp_processor_id() if the physical apicid is needed.

This prevents NUMA mapping from being queried from a different
CPU, which in turn makes it impossible to initialize NUMA
mapping before SMP bringup.

This patch replaces apic->apicid_to_node() with
->x86_32_numa_cpu_node() which takes @cpu, from which both
logical and physical apicids can easily be determined.  While at
it, drop duplicate implementations from bigsmp_32 and summit_32,
and use the default one.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-13-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:08 +01:00
Tejun Heo
df04cf011b x86: Implement x86_32_early_logical_apicid() for numaq_32
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-12-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:08 +01:00
Tejun Heo
3b39d93784 x86: Implement x86_32_early_logical_apicid() for summit_32
Factor out logical apic id calculation from
summit_init_apic_ldr() and use it for the
x86_32_early_logical_apicid() callback.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-11-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:07 +01:00
Tejun Heo
12bf24a47c x86: Implement x86_32_early_logical_apicid() for bigsmp_32
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-10-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:07 +01:00
Tejun Heo
3f6f679888 x86: Implement the default x86_32_early_logical_apicid()
Implement x86_32_early_logical_apicid() for the default apic
flat routing.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-9-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:07 +01:00
Tejun Heo
acb8bc09c6 x86: Add apic->x86_32_early_logical_apicid()
On x86_32, the mapping between cpu and logical apic ID differs
depending on the specific apic implementation in use.  The
mapping is initialized while bringing up CPUs; however, this
makes early inits ignore memory topology.

Add a x86_32 specific apic->x86_32_early_logical_apicid() which
is called early during boot to query the mapping.  The mapping
is later verified against the result of init_apic_ldr().  The
method is allowed to return BAD_APICID if it can't be determined
early.

noop variant which always returns BAD_APICID is implemented and
added to all x86_32 apic implementations.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-8-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:06 +01:00
Tejun Heo
7632611f53 x86: Kill apic->cpu_to_logical_apicid()
After the previous patch, apic->cpu_to_logical_apicid() is no
longer used.  Kill it.

For apic types with custom cpu_to_logical_apicid() which is also
used for other purposes, remove the function and modify its
users to do the mapping directly.

#ifdef's on CONFIG_SMP in es7000_32 and summit_32 are ignored
during conversion as they are not used for UP kernels.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-7-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:06 +01:00
Tejun Heo
6f802c4bfa x86: Always use x86_cpu_to_logical_apicid for cpu -> logical apic id
Currently, cpu -> logical apic id translation is done by
apic->cpu_to_logical_apicid() callback which may or may not use
x86_cpu_to_logical_apicid.  This is unnecessary as it should
always equal logical_smp_processor_id() which is known early
during CPU bring up.

Initialize x86_cpu_to_logical_apicid after apic->init_apic_ldr()
in setup_local_APIC() and always use x86_cpu_to_logical_apicid
for cpu -> logical apic id mapping.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-6-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:05 +01:00
Tejun Heo
4c321ff8a0 x86: Replace cpu_2_logical_apicid[] with early percpu variable
Unlike x86_64, on x86_32, the mapping from cpu to logical apicid
may vary depending on apic in use.  cpu_2_logical_apicid[] array
is used for this mapping.  Replace it with early percpu variable
x86_cpu_to_logical_apicid to make it better aligned with other
mappings.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-5-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:05 +01:00
Tejun Heo
1245e1668c x86: Make default_send_IPI_mask_sequence/allbutself_logical() 32bit only
Both functions are used only in 32bit.  Put them inside
CONFIG_X86_32. This is to prepare for logical apicid handling
update.

- Cyrill Gorcunov spotted that I forgot to move declarations in
ipi.h   under CONFIG_X86_32.  Fixed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: brgerst@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-4-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:05 +01:00
Tejun Heo
b78aa66b1f x86: Drop x86_32 MAX_APICID
Commit 56d91f13 (x86, acpi: Add MAX_LOCAL_APIC for 32bit) added
MAX_LOCAL_APIC for x86_32 but didn't replace MAX_APICID users
with it. Convert MAX_APICID users to MAX_LOCAL_APIC and drop
MAX_APICID.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-3-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:04 +01:00
Tejun Heo
bd22a2f198 x86: Kill unused static boot_cpu_logical_apicid in smpboot.c
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-2-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-28 14:54:04 +01:00
Linus Torvalds
1f0324caef Merge branch 'stable/bug-fixes-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug-fixes-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/setup: Route halt operations to safe_halt pvop.
  xen/e820: Guard against E820_RAM not having page-aligned size or start.
  xen/p2m: Mark INVALID_P2M_ENTRY the mfn_list past max_pfn.
2011-01-28 12:24:34 +10:00
Linus Torvalds
f7b548fa3d Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/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:
  percpu, x86: Fix percpu_xchg_op()
  x86: Remove left over system_64.h
  x86-64: Don't use pointer to out-of-scope variable in dump_trace()
2011-01-28 06:43:41 +10:00
Yinghai Lu
dda9911696 x86, perf: Change two init functions to static
init_hw_perf_events() is called via early_initcall now.
x86_pmu_event_init is x86_pmu member function.

So we can change them to static.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
LKML-Reference: <4D3A16F9.109@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-27 19:23:07 +01:00
Stephane Eranian
d038b12c6d perf: Fix Pentium4 raw event validation
This patch fixes some issues with raw event validation on
Pentium 4 (Netburst) based processors.

As I was testing libpfm4 Netburst support, I ran into two
problems in the p4_validate_raw_event() function:

   - the shared field must be checked ONLY when HT is on
   - the binding to ESCR register was missing

The second item was causing raw events to not be encoded
correctly compared to generic PMU events.

With this patch, I can now pass Netburst events to libpfm4
examples and get meaningful results:

  $ task -e global_power_events🏃u  noploop 1
  noploop for 1 seconds
  3,206,304,898 global_power_events:running

Signed-off-by: Stephane Eranian <eranian@google.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: peterz@infradead.org
Cc: paulus@samba.org
Cc: davem@davemloft.net
Cc: fweisbec@gmail.com
Cc: perfmon2-devel@lists.sf.net
Cc: eranian@gmail.com
Cc: robert.richter@amd.com
Cc: acme@redhat.com
Cc: gorcunov@gmail.com
Cc: ming.m.lin@intel.com
LKML-Reference: <4d3efb2f.1252d80a.1a80.ffffc83f@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-27 19:21:53 +01:00
Stefano Stabellini
23febeddbe xen/setup: Route halt operations to safe_halt pvop.
With this patch, the cpuidle driver does not load and
does not issue the mwait operations. Instead the hypervisor
is doing them (b/c we call the safe_halt pvops call).

This fixes quite a lot of bootup issues wherein the user had
to force interrupts for the continuation of the bootup.

Details are discussed in:

http://lists.xensource.com/archives/html/xen-devel/2011-01/msg00535.html

[v2: Wrote the commit description]

Reported-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Tested-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-01-27 12:00:24 -05:00
Stefano Stabellini
7cb31b752c xen/e820: Guard against E820_RAM not having page-aligned size or start.
Under Dell Inspiron 1525, and Intel SandyBridge SDP's the
BIOS e820 RAM is not page-aligned:

[   0.000000]  Xen: 0000000000100000 - 00000000df66d800 (usable)

We were not handling that and ended up setting up a pagetable
that included up to df66e000 with the disastrous effect that when

        memset(NODE_DATA(nodeid), 0, sizeof(pg_data_t));

tried to clear the page it would crash at the 2K mark.

Initially reported by Michael Young @
http://lists.xensource.com/archives/html/xen-devel/2011-01/msg00108.html

The fix is to page-align the size and also take into consideration
the start of the E820 (in case that is not page-aligned either). This
fixes the bootup failure on those affected machines.

This patch is a rework of the Micheal A Young initial patch and
considers the case if the start is not page-aligned.

Reported-by: Michael A Young <m.a.young@durham.ac.uk>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Michael A Young <m.a.young@durham.ac.uk>
2011-01-27 10:49:35 -05:00
Stefan Bader
cf04d120d9 xen/p2m: Mark INVALID_P2M_ENTRY the mfn_list past max_pfn.
In case the mfn_list does not have enough entries to fill
a p2m page we do not want the entries from max_pfn up to
the boundary to be filled with unknown values. Hence
set them to INVALID_P2M_ENTRY.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-01-27 10:49:34 -05:00
Thomas Gleixner
aac72277fd rwsem: Move duplicate function prototypes to linux/rwsem.h
All architecture specific rwsem headers carry the same function
prototypes. Just x86 adds asmregparm, which is an empty define on all
other architectures. S390 has a stale rwsem_downgrade_write()
prototype.

Remove the duplicates and add the prototypes to linux/rwsem.h

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Richard Henderson <rth@twiddle.net>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Miller <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
LKML-Reference: <20110126195833.970840140@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-27 12:30:39 +01:00
Thomas Gleixner
41e5887fa3 rwsem: Unify the duplicate rwsem_is_locked() inlines
Instead of having the same implementation in each architecture, move
it to linux/rwsem.h and remove the duplicates. It's unlikely that an
arch will ever implement something different, but we can deal with
that when it happens.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matt Turner <mattst88@gmail.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Miller <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
LKML-Reference: <20110126195833.876773757@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-27 12:30:39 +01:00
Thomas Gleixner
12249b3441 rwsem: Move duplicate init macros and functions to linux/rwsem.h
The rwsem initializers and related macros and functions are mostly the
same. Some of them lack the lockdep initializer, but having it in
place does not matter for architectures which do not support lockdep.

powerpc, sparc, x86: No functional change

sh, s390: Removes the duplicate init_rwsem (inline and #define)

alpha, ia64, xtensa: Use the lockdep capable init function in
       	     	     lib/rwsem.c which is just uninlining the init
       	     	     function for the LOCKDEP=n case

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matt Turner <mattst88@gmail.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Miller <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
LKML-Reference: <20110126195833.771812729@linutronix.de>
2011-01-27 12:30:39 +01:00
Thomas Gleixner
1c8ed640d9 rwsem: Move duplicate struct rwsem declaration to linux/rwsem.h
The difference between these declarations is the data type of the
count member and the lack of lockdep in some architectures/

long is equivivalent to signed long and the #ifdef guarded dep_map
member does not hurt anyone.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matt Turner <mattst88@gmail.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Miller <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
LKML-Reference: <20110126195833.679641914@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-27 12:30:39 +01:00
Thomas Gleixner
bde11efbc2 x86: Cleanup rwsem_count_t typedef
Remove the typedef which has no real reason to be there.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: David Miller <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
LKML-Reference: <20110126195833.580335506@linutronix.de>
2011-01-27 12:30:38 +01:00
Thomas Gleixner
c16a87ce06 rwsem: Cleanup includes
All rwsem implementations include the same headers. Include them from
include/linux/rwsem.h

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Matt Turner <mattst88@gmail.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: David Miller <davem@davemloft.net>
Cc: Chris Zankel <chris@zankel.net>
LKML-Reference: <20110126195833.483520950@linutronix.de>
2011-01-27 12:30:38 +01:00
Yinghai Lu
792363d2be x86: Don't copy per_cpu cpuinfo for BSP two times
smp_store_cpu_info(0) will do that.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
LKML-Reference: <4D3A16F2.5090902@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:44:50 +01:00
Yinghai Lu
b3d7336db5 x86: Move llc_shared_map out of cpu_info
cpu_info is already with per_cpu, We can take llc_shared_map out
of cpu_info, and declare it as per_cpu variable directly.

So later referencing could be simple and directly instead of
diving to find cpu_info at first.

Also could make smp_store_cpu_info() much simple to avoid to do
save and restore trick.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: Alok N Kataria <akataria@vmware.com>
Cc: Stephen Hemminger <shemminger@vyatta.com>
Cc: Hans J. Koch <hjk@linutronix.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <4D3A16E8.5020608@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:44:49 +01:00
Hans Rosenfeld
41b2610c34 x86, amd: Extend AMD northbridge caching code to support "Link Control" devices
"Link Control" devices (NB function 4) will be used by L3 cache
partitioning on family 0x15.

Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: <andreas.herrmann3@amd.com>
LKML-Reference: <1295881543-572552-4-git-send-email-hans.rosenfeld@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:28:23 +01:00
Hans Rosenfeld
b453de02b7 x86, amd: Enable L3 cache index disable on family 0x15
AMD family 0x15 CPUs support L3 cache index disable, so enable
it on them.

Signed-off-by: Hans Rosenfeld <hans.rosenfeld@amd.com>
Cc: <andreas.herrmann3@amd.com>
LKML-Reference: <1295881543-572552-3-git-send-email-hans.rosenfeld@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:28:23 +01:00
Andreas Herrmann
d518573de6 x86, amd: Normalize compute unit IDs on multi-node processors
On multi-node CPUs we don't need the socket wide compute unit ID
but the node-wide compute unit ID. Thus we need to normalize the
value. This is similar to what we do with cpu_core_id.

A compute unit is then identified by physical_package_id,
node_id, and compute_unit_id.

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
LKML-Reference: <1295881543-572552-2-git-send-email-hans.rosenfeld@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:28:22 +01:00
Eric Dumazet
889a7a6a5d percpu, x86: Fix percpu_xchg_op()
These recent percpu commits:

  2485b6464c: x86,percpu: Move out of place 64 bit ops into X86_64 section
  8270137a0d: cpuops: Use cmpxchg for xchg to avoid lock semantics

Caused this 'perf top' crash:

 Kernel panic - not syncing: Fatal exception in interrupt
 Pid: 0, comm: swapper Tainted: G     D
 2.6.38-rc2-00181-gef71723  Call Trace: <IRQ> [<ffffffff810465b5>]
    ? panic
    ? kmsg_dump
    ? kmsg_dump
    ? oops_end
    ? no_context
    ? __bad_area_nosemaphore
    ? perf_output_begin
    ? bad_area_nosemaphore
    ? do_page_fault
    ? __task_pid_nr_ns
    ? perf_event_tid
    ? __perf_event_header__init_id
    ? validate_chain
    ? perf_output_sample
    ? trace_hardirqs_off
    ? page_fault
    ? irq_work_run
    ? update_process_times
    ? tick_sched_timer
    ? tick_sched_timer
    ? __run_hrtimer
    ? hrtimer_interrupt
    ? account_system_vtime
    ? smp_apic_timer_interrupt
    ? apic_timer_interrupt
 ...

Looking at assembly code, I found:

list = this_cpu_xchg(irq_work_list, NULL);

gives this wrong code : (gcc-4.1.2 cross compiler)

ffffffff810bc45e:
	mov    %gs:0xead0,%rax
	cmpxchg %rax,%gs:0xead0
	jne    ffffffff810bc45e <irq_work_run+0x3e>
	test   %rax,%rax
	je     ffffffff810bc4aa <irq_work_run+0x8a>

Tell gcc we dirty eax/rax register in percpu_xchg_op()

Compiler must use another register to store pxo_new__

We also dont need to reload percpu value after a jump,
since a 'failed' cmpxchg already updated eax/rax

Wrong generated code was :
	xor     %rax,%rax   /* load 0 into %rax */
1:	mov     %gs:0xead0,%rax
	cmpxchg %rax,%gs:0xead0
	jne     1b
	test    %rax,%rax

After patch :

	xor     %rdx,%rdx   /* load 0 into %rdx */
	mov     %gs:0xead0,%rax
1:	cmpxchg %rdx,%gs:0xead0
	jne     1b:
	test    %rax,%rax

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Tejun Heo <tj@kernel.org>
LKML-Reference: <1295973114.3588.312.camel@edumazet-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:10:49 +01:00
Yinghai Lu
9a57c3e487 x86: Remove left over system_64.h
Left-over from the x86 merge ...

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <4D3E23D1.7010405@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-26 08:05:58 +01:00
Fenghua Yu
9599ec0471 x86-64, mem: Convert memmove() to assembly file and fix return value bug
memmove_64.c only implements memmove() function which is completely written in
inline assembly code. Therefore it doesn't make sense to keep the assembly code
in .c file.

Currently memmove() doesn't store return value to rax. This may cause issue if
caller uses the return value. The patch fixes this issue.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
LKML-Reference: <1295314755-6625-1-git-send-email-fenghua.yu@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-01-25 16:58:39 -08:00
Andrea Arcangeli
cacf061c5e thp: fix PARAVIRT x86 32bit noPAE
This fixes TRANSPARENT_HUGEPAGE=y with PARAVIRT=y and HIGHMEM64=n.

The #ifdef that this patch removes was erratically introduced to fix a
build error for noPAE (where pmd.pmd doesn't exist).  So then the kernel
built but it failed at runtime because set_pmd_at was a noop.  This will
correct it by enabling set_pmd_at for noPAE mode too.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: werner <w.landgraf@ru.ru>
Reported-by: Minchan Kim <minchan.kim@gmail.com>
Tested-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-26 10:49:57 +10:00
Tejun Heo
19df0c2fef percpu: align percpu readmostly subsection to cacheline
Currently percpu readmostly subsection may share cachelines with other
percpu subsections which may result in unnecessary cacheline bounce
and performance degradation.

This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR()
linker macros, makes each arch linker scripts specify its cacheline
size and use it to align percpu subsections.

This is based on Shaohua's x86 only patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Shaohua Li <shaohua.li@intel.com>
2011-01-25 14:26:50 +01:00
Jesper Juhl
2e5aa6824d x86-64: Don't use pointer to out-of-scope variable in dump_trace()
In arch/x86/kernel/dumpstack_64.c::dump_trace() we have this code:

...
  		if (!stack) {
  			unsigned long dummy;
  			stack = &dummy;
  			if (task && task != current)
  				stack = (unsigned long *)task->thread.sp;
  		}

  		bp = stack_frame(task, regs);
  		/*
  		 * Print function call entries in all stacks, starting at the
  		 * current stack address. If the stacks consist of nested
  		 * exceptions
  		 */
  		tinfo = task_thread_info(task);

  		for (;;) {
  			char *id;
  			unsigned long *estack_end;
  			estack_end = in_exception_stack(cpu, (unsigned long)stack,
  							&used, &id);
...

You'll notice that we assign to 'stack' the address of the variable
'dummy' which is only in-scope inside the 'if (!stack)'. So when we later
access stack (at the end of the above, and assuming we did not take the
'if (task && task != current)' branch) we'll be using the address of a
variable that is no longer in scope. I believe this patch is the proper
fix, but I freely admit that I'm not 100% certain.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
LKML-Reference: <alpine.LNX.2.00.1101242232590.10252@swampdragon.chaosbits.net>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-01-24 13:46:15 -08:00
Linus Torvalds
4398f31ca7 Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/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 jump label with RO/NX module protection crash
  x86, hotplug: Fix powersavings with offlined cores on AMD
  x86, mcheck, therm_throt.c: Export symbol platform_thermal_notify to allow coretemp to handler intr
  x86: Use asm-generic/cacheflush.h
  x86: Update CPU cache attributes table descriptors
2011-01-25 05:24:12 +10:00
matthieu castet
8969691343 x86: Fix jump label with RO/NX module protection crash
If we use jump table in module init, there are marked
as removed in __jump_table section after init is done.

But we already applied ro permissions on the module, so
we can't modify a read only section (crash in
remove_jump_label_module_init).

Make the __jump_table section rw.

Signed-off-by: Matthieu CASTET <castet.matthieu@free.fr>
Cc: Xiaotian Feng <xtfeng@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Siarhei Liakh <sliakh.lkml@gmail.com>
Cc: Xuxian Jiang <jiang@cs.ncsu.edu>
Cc: James Morris <jmorris@namei.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Dave Jones <davej@redhat.com>
Cc: Kees Cook <kees.cook@canonical.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <4D3C3F20.7030203@free.fr>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-23 16:12:45 +01:00
Jesper Juhl
7efd95f627 crypto: aesni-intel - Don't leak memory in rfc4106_set_hash_subkey
There's a small memory leak in 
arch/x86/crypto/aesni-intel_glue.c::rfc4106_set_hash_subkey(). If the call 
to kmalloc() fails and returns NULL then the memory allocated previously 
by ablkcipher_request_alloc() is not freed when we leave the function.

I could have just added a call to ablkcipher_request_free() before we 
return -ENOMEM, but that started to look too much like the code we 
already had at the end of the function, so I chose instead to rework the 
code a bit so that there are now a few labels at the end that we goto when 
various allocations fail, so we don't have to repeat the same blocks of 
code (this also reduces the object code size slightly).

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2011-01-23 18:59:17 +11:00
Borislav Petkov
93789b32db x86, hotplug: Fix powersavings with offlined cores on AMD
ea53069231 made a CPU use monitor/mwait
when offline. This is not the optimal choice for AMD wrt to powersavings
and we'd prefer our cores to halt (i.e. enter C1) instead. For this, the
same selection whether to use monitor/mwait has to be used as when we
select the idle routine for the machine.

With this patch, offlining cores 1-5 on a X6 machine allows core0 to
boost again.

[ hpa: putting this in urgent since it is a (power) regression fix ]

Reported-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: stable@kernel.org # 37.x
Cc: H. Peter Anvin <hpa@linux.intel.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Len Brown <lenb@kernel.org>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.hl>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1295534572-10730-1-git-send-email-bp@amd64.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-01-21 18:14:54 -08:00
Linus Torvalds
ebe0d80507 Merge branch 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
* 'fixes-2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
  x86,percpu: Move out of place 64 bit ops into X86_64 section
2011-01-21 13:43:21 -08:00
Linus Torvalds
cfd74486ea Merge branch 'stable/bug-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/bug-fixes-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: p2m: correctly initialize partial p2m leaf
  xen: fix non-ANSI function warning in irq.c
2011-01-21 13:35:10 -08:00
Stefan Bader
8e1b4cf210 xen: p2m: correctly initialize partial p2m leaf
After changing the p2m mapping to a tree by

  commit 58e05027b5
    xen: convert p2m to a 3 level tree

and trying to boot a DomU with 615MB of memory, the following crash was
observed in the dump:

kernel direct mapping tables up to 26f00000 @ 1ec4000-1fff000
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<c0107397>] xen_set_pte+0x27/0x60
*pdpt = 0000000000000000 *pde = 0000000000000000

Adding further debug statements showed that when trying to set up
pfn=0x26700 the returned mapping was invalid.

pfn=0x266ff calling set_pte(0xc1fe77f8, 0x6b3003)
pfn=0x26700 calling set_pte(0xc1fe7800, 0x3)

Although the last_pfn obtained from the startup info is 0x26700, which
should in turn not be hit, the additional 8MB which are added as extra
memory normally seem to be ok. This lead to looking into the initial
p2m tree construction, which uses the smaller value and assuming that
there is other code handling the extra memory.

When the p2m tree is set up, the leaves are directly pointed to the
array which the domain builder set up. But if the mapping is not on a
boundary that fits into one p2m page, this will result in the last leaf
being only partially valid. And as the invalid entries are not
initialized in that case, things go badly wrong.

I am trying to fix that by checking whether the current leaf is a
complete map and if not, allocate a completely new page and copy only
the valid pointers there. This may not be the most efficient or elegant
solution, but at least it seems to allow me booting DomUs with memory
assignments all over the range.

BugLink: http://bugs.launchpad.net/bugs/686692
[v2: Redid a bit of commit wording and fixed a compile warning]

Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-01-21 11:24:14 -05:00
Fenghua Yu
f21bbec9ff x86, mcheck, therm_throt.c: Export symbol platform_thermal_notify to allow coretemp to handler intr
In therm_throt.c, commit
9e76a97efd patch doesn't export
the symbol platform_thermal_notify.

Other drivers (e.g. drivers/hwmon/coretemp.c) can not find the
symbol platform_thermal_notify when defining threshould
interrupt handler.

Please apply this patch to allow threshold interrupt handler in
coretemp.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Cc: R Durgadoss <durgadoss.r@intel.com>
Cc: khali@linux-fr.org <khali@linux-fr.org>
Cc: lm-sensors@lm-sensors.org <lm-sensors@lm-sensors.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
LKML-Reference: <20110121041239.GB26954@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-21 14:11:12 +01:00
Akinobu Mita
cc67ba6352 x86: Use asm-generic/cacheflush.h
The implementation of the cache flushing interfaces on the x86
is identical with the default implementation in asm-generic.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: arnd@arndb.de
LKML-Reference: <1295523136-4277-2-git-send-email-akinobu.mita@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-21 14:11:12 +01:00
Linus Torvalds
2b1caf6ed7 Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  smp: Allow on_each_cpu() to be called while early_boot_irqs_disabled status to init/main.c
  lockdep: Move early boot local IRQ enable/disable status to init/main.c
2011-01-20 18:30:37 -08:00
Linus Torvalds
8d99641f6c Merge branch 'akpm'
* akpm:
  kernel/smp.c: consolidate writes in smp_call_function_interrupt()
  kernel/smp.c: fix smp_call_function_many() SMP race
  memcg: correctly order reading PCG_USED and pc->mem_cgroup
  backlight: fix 88pm860x_bl macro collision
  drivers/leds/ledtrig-gpio.c: make output match input, tighten input checking
  MAINTAINERS: update Atmel AT91 entry
  mm: fix truncate_setsize() comment
  memcg: fix rmdir, force_empty with THP
  memcg: fix LRU accounting with THP
  memcg: fix USED bit handling at uncharge in THP
  memcg: modify accounting function for supporting THP better
  fs/direct-io.c: don't try to allocate more than BIO_MAX_PAGES in a bio
  mm: compaction: prevent division-by-zero during user-requested compaction
  mm/vmscan.c: remove duplicate include of compaction.h
  memblock: fix memblock_is_region_memory()
  thp: keep highpte mapped until it is no longer needed
  kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT
2011-01-20 17:02:14 -08:00
David Rientjes
6a108a14fa kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT
The meaning of CONFIG_EMBEDDED has long since been obsoleted; the option
is used to configure any non-standard kernel with a much larger scope than
only small devices.

This patch renames the option to CONFIG_EXPERT in init/Kconfig and fixes
references to the option throughout the kernel.  A new CONFIG_EMBEDDED
option is added that automatically selects CONFIG_EXPERT when enabled and
can be used in the future to isolate options that should only be
considered for embedded systems (RISC architectures, SLOB, etc).

Calling the option "EXPERT" more accurately represents its intention: only
expert users who understand the impact of the configuration changes they
are making should enable it.

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: David Woodhouse <david.woodhouse@intel.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Greg KH <gregkh@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Robin Holt <holt@sgi.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-20 17:02:05 -08:00
Linus Torvalds
e55fdbd741 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  virtio: remove virtio-pci root device
  LGUEST_GUEST: fix unmet direct dependencies (VIRTUALIZATION && VIRTIO)
  lguest: compile fixes
  lguest: Use this_cpu_ops
  lguest: document --rng in example Launcher
  lguest: example launcher to use guard pages, drop PROT_EXEC, fix limit logic
  lguest: --username and --chroot options
2011-01-20 16:31:20 -08:00
Randy Dunlap
7d81c3b9e2 xen: fix non-ANSI function warning in irq.c
Fix sparse warning for non-ANSI function declaration:

arch/x86/xen/irq.c:129:30: warning: non-ANSI function declaration of function 'xen_init_irq_ops'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc:	Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2011-01-20 14:52:13 -05:00
Tejun Heo
2ce802f62b lockdep: Move early boot local IRQ enable/disable status to init/main.c
During early boot, local IRQ is disabled until IRQ subsystem is
properly initialized.  During this time, no one should enable
local IRQ and some operations which usually are not allowed with
IRQ disabled, e.g. operations which might sleep or require
communications with other processors, are allowed.

lockdep tracked this with early_boot_irqs_off/on() callbacks.
As other subsystems need this information too, move it to
init/main.c and make it generally available.  While at it,
toggle the boolean to early_boot_irqs_disabled instead of
enabled so that it can be initialized with %false and %true
indicates the exceptional condition.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <20110120110635.GB6036@htj.dyndns.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-20 13:32:33 +01:00
Dave Jones
fb87ec382f x86: Update CPU cache attributes table descriptors
Update to latest definitions in:

   http://www.intel.com/Assets/PDF/appnote/241618.pdf

[ Note, this update of the doc has removed some old values which
  we have listed.  I think until we have clarification that they
  were never used in production, they should be left there. ]

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
LKML-Reference: <20110120012055.GA15985@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-20 12:13:20 +01:00
Randy Dunlap
2b8216e635 LGUEST_GUEST: fix unmet direct dependencies (VIRTUALIZATION && VIRTIO)
Honor the kconfig menu hierarchy to remove kconfig dependency warnings:
VIRTIO and VIRTIO_RING are subordinate to VIRTUALIZATION.

warning: (LGUEST_GUEST) selects VIRTIO which has unmet direct dependencies (VIRTUALIZATION)
warning: (LGUEST_GUEST && VIRTIO_PCI && VIRTIO_BALLOON) selects VIRTIO_RING which has unmet direct dependencies (VIRTUALIZATION && VIRTIO)

Reported-by: Toralf F_rster <toralf.foerster@gmx.de>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-01-20 21:37:30 +10:30
Rusty Russell
ced05dd741 lguest: compile fixes
arch/x86/lguest/boot.c: In function ‘lguest_init_IRQ’:
arch/x86/lguest/boot.c:824: error: macro "__this_cpu_write" requires 2 arguments, but only 1 given
arch/x86/lguest/boot.c:824: error: ‘__this_cpu_write’ undeclared (first use in this function)
arch/x86/lguest/boot.c:824: error: (Each undeclared identifier is reported only once
arch/x86/lguest/boot.c:824: error: for each function it appears in.)

drivers/lguest/x86/core.c: In function ‘copy_in_guest_info’:
drivers/lguest/x86/core.c:94: error: lvalue required as left operand of assignment

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-01-20 21:37:29 +10:30
Christoph Lameter
c9f2954964 lguest: Use this_cpu_ops
Use this_cpu_ops in a couple of places in lguest.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2011-01-20 21:37:29 +10:30
Jesper Juhl
42b16b3fbb Kill off warning: ‘inline’ is not at beginning of declaration
Fix a bunch of
	warning: ‘inline’ is not at beginning of declaration
messages when building a 'make allyesconfig' kernel with -Wextra.

These warnings are trivial to kill, yet rather annoying when building with
-Wextra.
The more we can cut down on pointless crap like this the better (IMHO).

A previous patch to do this for a 'allnoconfig' build has already been
merged. This just takes the cleanup a little further.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-01-19 15:43:08 +01:00
Jan Beulich
9032160275 x86: Unify "numa=" command line option handling
In order to be able to suppress the use of SRAT tables that
32-bit Linux can't deal with (in one case known to lead to a
non-bootable system, unless disabling ACPI altogether), move the
"numa=" option handling to common code.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Reviewed-by: Thomas Renninger <trenn@suse.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Renninger <trenn@suse.de>
LKML-Reference: <4D36B581020000780002D0FF@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-19 10:25:18 +01:00
Ingo Molnar
6b35eb9ddc Revert "x86: Make relocatable kernel work with new binutils"
This reverts commit 86b1e8dd83 ("x86: Make relocatable kernel work with
new binutils").

Markus Trippelsdorf reported a boot failure caused by this patch.

The real solution to the original patch will likely involve an
arch-generic solution to define an overlaid jiffies_64 and jiffies
variables.

Until that's done and tested on all architectures revert this commit to
solve the regression.

Reported-and-bisected-by: Markus Trippelsdorf <markus@trippelsdorf.de>
Acked-by: "H. Peter Anvin" <hpa@zytor.com>
Cc: Shaohua Li <shaohua.li@intel.com>
Cc: "Lu, Hongjiu" <hongjiu.lu@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Cc: Sam Ravnborg <sam@ravnborg.org>
LKML-Reference: <4D36A759.60704@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-19 10:09:42 +01:00
Linus Torvalds
404cbbd52f Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/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: Clear irqstack thread_info
  x86: Make relocatable kernel work with new binutils
2011-01-18 14:29:21 -08:00
Brian Gerst
7b698ea377 x86: Clear irqstack thread_info
Mathias Merz reported that v2.6.37 failed to boot on his
system.

Make sure that the thread_info part of the irqstack is
initialized to zeroes.

Reported-and-Tested-by: Matthias Merz <linux@merz-ka.de>
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <AANLkTimyKXfJ1x8tgwrr1hYnNLrPfgE1NTe4z7L6tUDm@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-18 14:58:37 +01:00
Shaohua Li
86b1e8dd83 x86: Make relocatable kernel work with new binutils
The CONFIG_RELOCATABLE=y option is broken with new binutils, which will make
boot panic.

According to Lu Hongjiu, the affected binutils are from 2.20.51.0.12 to
2.21.51.0.3, which are release since Oct 22 this year. At least ubuntu 10.10 is
using such binutils. See:

    http://sourceware.org/bugzilla/show_bug.cgi?id=12327

The reason of the boot panic is that we have 'jiffies = jiffies_64;' in
vmlinux.lds.S. The jiffies isn't in any section. In kernel build, there is
warning saying jiffies is an absolute address and can't be relocatable. At
runtime, jiffies will have virtual address 0.

Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Cc: Lu Hongjiu<hongjiu.lu@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
LKML-Reference: <1295312269.1949.725.camel@sli10-conroe>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-18 09:05:33 +01:00
Linus Torvalds
f9ee7f60d6 Merge branches 'core-fixes-for-linus', 'x86-fixes-for-linus', 'timers-fixes-for-linus' and 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  rcu: avoid pointless blocked-task warnings
  rcu: demote SRCU_SYNCHRONIZE_DELAY from kernel-parameter status
  rtmutex: Fix comment about why new_owner can be NULL in wake_futex_pi()

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, olpc: Add missing Kconfig dependencies
  x86, mrst: Set correct APB timer IRQ affinity for secondary cpu
  x86: tsc: Fix calibration refinement conditionals to avoid divide by zero
  x86, ia64, acpi: Clean up x86-ism in drivers/acpi/numa.c

* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  timekeeping: Make local variables static
  time: Rename misnamed minsec argument of clocks_calc_mult_shift()

* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  tracing: Remove syscall_exit_fields
  tracing: Only process module tracepoints once
  perf record: Add "nodelay" mode, disabled by default
  perf sched: Fix list of events, dropping unsupported ':r' modifier
  Revert "perf tools: Emit clearer message for sys_perf_event_open ENOENT return"
  perf top: Fix annotate segv
  perf evsel: Fix order of event list deletion
2011-01-15 12:45:00 -08:00
Stephen Rothwell
de23be5f35 xen: export arbitrary_virt_to_machine
Fixes this build error:

 ERROR: "arbitrary_virt_to_machine" [drivers/xen/xen-gntdev.ko] undefined!

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-14 16:11:12 -08:00
H. Peter Anvin
76d1f7bfcd x86, olpc: Add missing Kconfig dependencies
OLPC uses select for OLPC_OPENFIRMWARE, which means OLPC has to
enforce the dependencies for OLPC_OPENFIRMWARE.  Make sure it does so.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Daniel Drake <dsd@laptop.org>
Cc: Andres Salomon <dilinger@queued.net>
Cc: Grant Likely <grant.likely@secretlab.ca>
LKML-Reference: <20100923162846.D8D409D401B@zog.reactivated.net>
Cc: <stable@kernel.org> 2.6.37
2011-01-14 11:57:06 -08:00
Jacob Pan
6550904ddb x86, mrst: Set correct APB timer IRQ affinity for secondary cpu
Offlining the secondary CPU causes the timer irq affinity to be set to
CPU 0. When the secondary CPU is back online again, the wrong irq
affinity will be used.

This patch ensures secondary per CPU timer always has the correct
IRQ affinity when enabled.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
LKML-Reference: <1294963604-18111-1-git-send-email-jacob.jun.pan@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@kernel.org> 2.6.37
2011-01-14 11:53:44 -08:00
Linus Torvalds
d73b388459 Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6:
  PCI/PM: Report wakeup events before resuming devices
  PCI/PM: Use pm_wakeup_event() directly for reporting wakeup events
  PCI: sysfs: Update ROM to include default owner write access
  x86/PCI: make Broadcom CNB20LE driver EMBEDDED and EXPERIMENTAL
  x86/PCI: don't use native Broadcom CNB20LE driver when ACPI is available
  PCI/ACPI: Request _OSC control once for each root bridge (v3)
  PCI: enable pci=bfsort by default on future Dell systems
  PCI/PCIe: Clear Root PME Status bits early during system resume
  PCI: pci-stub: ignore zero-length id parameters
  x86/PCI: irq and pci_ids patch for Intel Patsburg
  PCI: Skip id checking if no id is passed
  PCI: fix __pci_device_probe kernel-doc warning
  PCI: make pci_restore_state return void
  PCI: Disable ASPM if BIOS asks us to
  PCI: Add mask bit definition for MSI-X table
  PCI: MSI: Move MSI-X entry definition to pci_regs.h

Fix up trivial conflicts in drivers/net/{skge.c,sky2.c} that had in the
meantime been converted to not use legacy PCI power management, and thus
no longer use pci_restore_state() at all (and that caused trivial
conflicts with the "make pci_restore_state return void" patch)
2011-01-14 09:29:05 -08:00
John Stultz
62627bec8a x86: tsc: Fix calibration refinement conditionals to avoid divide by zero
Konrad Wilk reported that the new delayed calibration crashes with a
divide by zero on Xen. The reason is that Xen sets the pmtimer
address, but reading from it returns 0xffffff. That results in the
ref_start and ref_stop value being the same, so the delta is zero
which causes the divide by zero later in the calculation.

The conditional (!hpet && !ref_start && !ref_stop) which sanity checks
the calibration reference values doesn't really make sense. If the
refs are null, but hpet is on, we still want to break out.

The div by zero would be possible to trigger by chance if both reads
from the hardware provided the exact same value (due to hardware
wrapping).

So checking if both the ref values are the same should handle if we
don't have hardware (both null) or if they are the same value (either by
invalid hardware, or by chance), avoiding the div by zero issue.

[ tglx: Applied the same fix to native_calibrate_tsc() where this
  	check was copied from ]

Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: John Stultz <johnstul@us.ibm.com>
LKML-Reference: <1295024788-15619-1-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-01-14 18:28:01 +01:00
Bjorn Helgaas
64a5fed666 x86/PCI: make Broadcom CNB20LE driver EMBEDDED and EXPERIMENTAL
This functionality is known to be incomplete, so discourage its use in
general-purpose kernels.

The only reason to use this driver is to support PCI hotplug on CNB20LE-
based machines that don't have ACPI, and there are very few such
systems.

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=665109
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-01-14 08:55:42 -08:00
Bjorn Helgaas
30e664afb5 x86/PCI: don't use native Broadcom CNB20LE driver when ACPI is available
The broadcom_bus.c quirk was written (without benefit of documentation)
to support PCI hotplug on an old system that doesn't have ACPI.  As
such, we should only use it when the system doesn't have ACPI.

If the system does have ACPI and we need the host bridge description, we
should get it from the ACPI _CRS method.  On machines older than 2008,
we currently ignore _CRS, but that doesn't mean we should use
broadcom_bus.c.  It means we should either (a) do what we've done in the
past and assume everything in the PCI gap is routed to bus 0 (so hotplug
may not work), or (b) arrange to use _CRS.  This patch does (a).

Reference: https://bugzilla.redhat.com/show_bug.cgi?id=665109
Acked-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-01-14 08:55:41 -08:00
Narendra_K@Dell.com
6e8af08dfa PCI: enable pci=bfsort by default on future Dell systems
This patch enables pci=bfsort by default on future Dell systems.
It reads SMBIOS type 0xB1 vendor specific record and sets pci=bfsort
accordingly.

Offset  Name    Length  Value   Description

04      Flags0  Word    Varies  Bits 9-10
                                - 10:9 = 00  Unknown
                                - 10:9 = 01  Breadth First
                                - 10:9 = 10  Depth First
                                - 10:9 = 11  Reserved

1. Any time pci=bfsort has to be enabled on a system, we need to add the
   model number of the system to the white list. With this patch, that
   is not required.

2. Typically, model number has to be added to the white list when the
   system is under development. With this change, that is not required.

Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com>
Signed-off-by: Narendra K <narendra_k@dell.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2011-01-14 08:55:41 -08:00
Andres Salomon
419cdc54ea x86: OLPC: convert olpc-xo1 driver from pci device to platform device
The cs5535-mfd driver now takes care of the PCI BAR handling; this
means the olpc-xo1 driver shouldn't be touching the PCI device at all.

This patch uses both cs5535-acpi and cs5535-pms platform devices rather
than a single platform device because the cs5535-mfd driver may be used
by other CS5535 platform-specific drivers; OLPC doesn't get to dictate
that ACPI and PMS will always be used together.

Signed-off-by: Andres Salomon <dilinger@queued.net>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-01-14 12:38:15 +01:00
Linus Torvalds
52cfd503ad Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6: (59 commits)
  ACPI / PM: Fix build problems for !CONFIG_ACPI related to NVS rework
  ACPI: fix resource check message
  ACPI / Battery: Update information on info notification and resume
  ACPI: Drop device flag wake_capable
  ACPI: Always check if _PRW is present before trying to evaluate it
  ACPI / PM: Check status of power resources under mutexes
  ACPI / PM: Rename acpi_power_off_device()
  ACPI / PM: Drop acpi_power_nocheck
  ACPI / PM: Drop acpi_bus_get_power()
  Platform / x86: Make fujitsu_laptop use acpi_bus_update_power()
  ACPI / Fan: Rework the handling of power resources
  ACPI / PM: Register power resource devices as soon as they are needed
  ACPI / PM: Register acpi_power_driver early
  ACPI / PM: Add function for updating device power state consistently
  ACPI / PM: Add function for device power state initialization
  ACPI / PM: Introduce __acpi_bus_get_power()
  ACPI / PM: Introduce function for refcounting device power resources
  ACPI / PM: Add functions for manipulating lists of power resources
  ACPI / PM: Prevent acpi_power_get_inferred_state() from making changes
  ACPICA: Update version to 20101209
  ...
2011-01-13 20:15:35 -08:00
Linus Torvalds
dc8e7e3ec6 Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6
* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
  cpuidle/x86/perf: fix power:cpu_idle double end events and throw cpu_idle events from the cpuidle layer
  intel_idle: open broadcast clock event
  cpuidle: CPUIDLE_FLAG_CHECK_BM is omap3_idle specific
  cpuidle: CPUIDLE_FLAG_TLB_FLUSHED is specific to intel_idle
  cpuidle: delete unused CPUIDLE_FLAG_SHALLOW, BALANCED, DEEP definitions
  SH, cpuidle: delete use of NOP CPUIDLE_FLAGS_SHALLOW
  cpuidle: delete NOP CPUIDLE_FLAG_POLL
  ACPI: processor_idle: delete use of NOP CPUIDLE_FLAGs
  cpuidle: Rename X86 specific idle poll state[0] from C0 to POLL
  ACPI, intel_idle: Cleanup idle= internal variables
  cpuidle: Make cpuidle_enable_device() call poll_idle_init()
  intel_idle: update Sandy Bridge core C-state residency targets
2011-01-13 20:15:18 -08:00
Linus Torvalds
9c4bc1c2be Merge branch 'stable/gntdev' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen
* 'stable/gntdev' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/p2m: Fix module linking error.
  xen p2m: clear the old pte when adding a page to m2p_override
  xen gntdev: use gnttab_map_refs and gnttab_unmap_refs
  xen: introduce gnttab_map_refs and gnttab_unmap_refs
  xen p2m: transparently change the p2m mappings in the m2p override
  xen/gntdev: Fix circular locking dependency
  xen/gntdev: stop using "token" argument
  xen: gntdev: move use of GNTMAP_contains_pte next to the map_op
  xen: add m2p override mechanism
  xen: move p2m handling to separate file
  xen/gntdev: add VM_PFNMAP to vma
  xen/gntdev: allow usermode to map granted pages
  xen: define gnttab_set_map_op/unmap_op

Fix up trivial conflict in drivers/xen/Kconfig
2011-01-13 18:46:48 -08:00