Commit graph

280112 commits

Author SHA1 Message Date
Linus Walleij
6efab15307 ARM: 7239/1: integrator: explicitly select the serial drivers
The defconfig for the Integrator only include the serial drivers
for the PL010 as found in the Integrator/AP, to make sure we
don't loose the serial console we simply select both PL010 and
PL011 drivers from the Integrator Kconfig entries so they are
always included when applicable.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:58:10 +00:00
Linus Walleij
ee35887e4a ARM: 7238/1: integrator: only hardcode AP PrimeCell IDs
We don't need to hardcode the peripheral IDs for the Integrator/CP,
the numbers found in the hardware are correct anyway.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:58:09 +00:00
Linus Torvalds
155d4551bd Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  netfilter: xt_connbytes: handle negation correctly
  net: relax rcvbuf limits
  rps: fix insufficient bounds checking in store_rps_dev_flow_table_cnt()
  net: introduce DST_NOPEER dst flag
  mqprio: Avoid panic if no options are provided
  bridge: provide a mtu() method for fake_dst_ops
2011-12-23 14:57:55 -08:00
Javi Merino
abb959f8a3 ARM: 7237/1: PL330: Fix driver freeze
Add a req_running field to the pl330_thread to track which request (if
any) has been submitted to the DMA.  This mechanism replaces the old
one in which we tried to guess the same by looking at the PC of the
DMA, which could prevent the driver from sending more requests if it
didn't guess correctly.

Reference: <1323631637-9610-1-git-send-email-javi.merino@arm.com>

Signed-off-by: Javi Merino <javi.merino@arm.com>
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Tested-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:57:26 +00:00
Peter De Schrijver (NVIDIA)
4f3f25821c ARM: 7241/1: mach-ux500 Use CONFIG_ARCH_NR_GPIO
Add default value for CONFIG_ARCH_NR_GPIO to Kconfig and remove the
definition in gpio.h. We can't remove gpio.h yet as asm/gpio.h still
includes it.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:51 +00:00
Peter De Schrijver (NVIDIA)
3dea19e826 ARM: 7244/1: mach-shmobile: Use CONFIG_ARCH_NR_GPIO
Add default value for CONFIG_ARCH_NR_GPIO to Kconfig and remove the
definition in gpio.h.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:51 +00:00
Peter De Schrijver (NVIDIA)
44986ab056 ARM: 7240/1: Make ARCH_NR_GPIO a Kconfig variable
Change ARCH_NR_GPIO into a Kconfig variable as suggested by Russel King.
This makes ARCH_NR_GPIO single zImage friendly. The default value for
tegra is defined as well.

Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:50 +00:00
Linus Walleij
7c324d837f ARM: 7243/1: sp804: modernize clock event registration
This removes the hardcoded shift value and lets the clockevent core
come up with suitable mult and div factors. Tested on the
Integrator/CP.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:50 +00:00
Linus Walleij
4fd7f9b128 ARM: 7212/1: smp_twd: reconfigure clockevents after cpufreq change
This break-out from Colin Cross' cpufreq-aware TWD patch
will handle the case when our localtimer's clock changes with
the cpu clock. A cpufreq transtion notifier will be registered
only if the platform has supplied a specified clock to the TWD.

After a cpufreq transition, update the clockevent's frequency
by fetching the new clock rate from the clock framework and
reprogram the next clock event.

The necessary changes in the clockevents framework was done by
Thomas Gleixner in kernel v3.0.

ChangeLog v1->v2:
- Replace IS_ERR_OR_NULL() with IS_ERR() in twd_clk check.
- Update code to use the already existing per-cpu array of TWD
  clockevents instead of adding cruft.

[Broke out, ifdef:ed CPUfreq stuff for non-cpufreq configs]
[Rebased to newer TWD base with per-CPU clock array]

Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:50 +00:00
Linus Walleij
5def51b0f8 ARM: 7211/1: smp_twd: get the rate from a clock
This break-out from Colin Cross' cpufreq-aware TWD patch will
optionally retrieve the clock rate of the TWD from an external
clock. A variant of this patch has been proposed by Rob Herring
as well.

The basic idea is to avoid recalibrating the rate of the clock
at boot if the platform already know what rate the clock to the
TWD block has.

ChangeLog v1->v2: added clk_[prepare|unprepare] calls.

[Broke out of larger SMP TWD patch]

Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:50 +00:00
Linus Walleij
54d15b1d7a ARM: 7210/1: smp_twd: modernize clock event registration
This break-out from Colin Cross' cpufreq-aware TWD patch will
just modernize the clock event registration code to use
clockevents_config_and_register().

[Broke out of larger SMP TWD patch]

Signed-off-by: Colin Cross <ccross@android.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:54:50 +00:00
Christoph Hellwig
be4f1ac828 xfs: log all dirty inodes in xfs_fs_sync_fs
Since Linux 2.6.36 the writeback code has introduces various measures for
live lock prevention during sync().  Unfortunately some of these are
actively harmful for the XFS model, where the inode gets marked dirty for
metadata from the data I/O handler.

The older_than_this checks that are now more strictly enforced since

    writeback: avoid livelocking WB_SYNC_ALL writeback

by only calling into __writeback_inodes_sb and thus only sampling the
current cut off time once.  But on a slow enough devices the previous
asynchronous sync pass might not have fully completed yet, and thus XFS
might mark metadata dirty only after that sampling of the cut off time for
the blocking pass already happened.  I have not myself reproduced this
myself on a real system, but by introducing artificial delay into the
XFS I/O completion workqueues it can be reproduced easily.

Fix this by iterating over all XFS inodes in ->sync_fs and log all that
are dirty.  This might log inode that only got redirtied after the
previous pass, but given how cheap delayed logging of inodes is it
isn't a major concern for performance.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2011-12-23 16:41:47 -06:00
Christoph Hellwig
0b8fd3033c xfs: log the inode in ->write_inode calls for kupdate
If the writeback code writes back an inode because it has expired we currently
use the non-blockin ->write_inode path.  This means any inode that is pinned
is skipped.  With delayed logging and a workload that has very little log
traffic otherwise it is very likely that an inode that gets constantly
written to is always pinned, and thus we keep refusing to write it.  The VM
writeback code at that point redirties it and doesn't try to write it again
for another 30 seconds.  This means under certain scenarious time based
metadata writeback never happens.

Fix this by calling into xfs_log_inode for kupdate in addition to data
integrity syncs, and thus transfer the inode to the log ASAP.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
2011-12-23 16:41:47 -06:00
Dave Martin
ba90c516ba ARM: 7197/1: errata: Remove SMP dependency for erratum 751472
Activation conditions for a workaround should not be encoded in the
workaround's direct dependencies if this makes otherwise reasonable
configuration choices impossible.

This patches uses the SMP/UP patching facilities instead to compile
out the workaround if the configuration means that it is definitely
not needed.

This means that configs for buggy silicon can simply select
ARM_ERRATA_751472, without preventing a UP kernel from being built
or duplicatiing knowledge about when to activate the workaround.
This seems the correct way to do things, because the erratum is a
property of the silicon, irrespective of what the kernel config
happens to be.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:34:48 +00:00
Dave Martin
e66dc7452a ARM: 7196/1: errata: Remove SMP dependency for erratum 720789
Activation conditions for a workaround should not be encoded in the
workaround's direct dependencies if this makes otherwise reasonable
configuration choices impossible.

The workaround for erratum 720789 only affects a code path which is
not active in UP kernels; hence it should be safe to turn on in UP
kernels, without penalty.

This patch simply removes the extra dependency on SMP from Kconfig.

This means that configs for buggy silicon can simply select
ARM_ERRATA_720789, without preventing a UP kernel from being built
or duplicatiing knowledge about when to activate the workaround.

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:34:47 +00:00
Jamie Iles
c87fb57346 ARM: 7235/1: irqdomain: export irq_domain_simple_ops for !CONFIG_OF
irqdomain support is used in interrupt controller drivers that may not
have device tree support but only need the basic HW->Linux irq
translation.  Rather than having each of these implement their own IRQ
domain, allow them to use the simple ops.

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rob Herring <robherring2@gmail.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 22:33:58 +00:00
David S. Miller
035c4c16be netlink: Undo const marker in netlink_is_kernel().
We can't do this without propagating the const to nlk_sk()
too, otherwise:

net/netlink/af_netlink.c: In function ‘netlink_is_kernel’:
net/netlink/af_netlink.c:103:2: warning: passing argument 1 of ‘nlk_sk’ discards ‘const’ qualifier from pointer target type [enabled by default]
net/netlink/af_netlink.c:96:36: note: expected ‘struct sock *’ but argument is of type ‘const struct sock *’

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 17:33:03 -05:00
David S. Miller
abb434cb05 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	net/bluetooth/l2cap_core.c

Just two overlapping changes, one added an initialization of
a local variable, and another change added a new local variable.

Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 17:13:56 -05:00
stephen hemminger
2494654d48 netem: loss model API sizes
The new netem loss model is configured with nested netlink messages.
This code is being overly strict about sizes, and is easily confused
by padding (or possible future expansion). Also message
for gemodel is incorrect.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:51:18 -05:00
Eric Dumazet
f5a59b7332 sch_hfsc: report backlog information
Add backlog (byte count) information in hfsc classes and qdisc, so that
"tc -s" can report it to user, instead of 0 values :

qdisc hfsc 1: root refcnt 6 default 20
 Sent 45141660 bytes 30545 pkt (dropped 0, overlimits 91751 requeues 0)
 rate 1492Kbit 126pps backlog 103226b 74p requeues 0
...
class hfsc 1:20 parent 1:1 leaf 1201: rt m1 0bit d 0us m2 400000bit ls m1 0bit d 0us m2 200000bit
 Sent 49534912 bytes 33519 pkt (dropped 0, overlimits 0 requeues 0)
 backlog 81822b 56p requeues 0
 period 23 work 49451576 bytes rtwork 13277552 bytes level 0
...

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: John A. Sullivan III <jsullivan@opensourcedevel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:51:18 -05:00
Dan Carpenter
681f16232c usb: pegasus: cleanup a couple conditions
We recently made loopback a bool type instead of an int, so the bitwise
AND is redundent.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:51:18 -05:00
Ian Campbell
9d4dde5215 net: only use a single page of slop in MAX_SKB_FRAGS
In order to accommodate a 64K buffer we need 64K/PAGE_SIZE plus one more page
in order to allow for a buffer which does not start on a page boundary.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:51:18 -05:00
allan
f87ce5b254 drivers/net/usb/asix: fixed asix_get_wol reported wrong wol status issue
Fixed the asix_get_wol() routine reported wrong wol status issue.

Signed-off-by: Allan Chou <allan@asix.com.tw>
Tested-by: Eugene <elubarsky@gmail.com>; Allan Chou <allan@asix.com.tw>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:51:18 -05:00
Wei Yongjun
30e7dfe76e packet: fix typo in packet_mmap.txt
Just fixed typo of sample code in packet_mmap.txt

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:50:58 -05:00
Krishna Gudipati
7afc5dbde0 bna: Add debugfs interface.
Change details:
	- Add debugfs support to obtain firmware trace, saved firmware trace on
	  an IOC crash, driver info and read/write to registers.

	- debugfs hierarchy:
	  bna/pci_dev:<pci_name>
	  where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna

	- Following are the new debugfs entries added:
	  fwtrc: collect current firmware trace.
	  fwsave: collect last saved fw trace as a result of firmware crash.
	  regwr: write one word to chip register
	  regrd: read one or more words from chip register.
	  drvinfo: collect the driver information.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:50:58 -05:00
Krishna Gudipati
72a9730b3f bna: Added flash sub-module and ethtool eeprom entry points.
Change details:
	- The patch adds flash sub-module to the bna driver.
	- Added ethtool set_eeprom() and get_eeprom() entry points to
	  support flash partition read/write operations.

Signed-off-by: Krishna Gudipati <kgudipat@brocade.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 16:50:58 -05:00
Gustavo F. Padovan
cad44c2bf6 Revert "Bluetooth: Increase HCI reset timeout in hci_dev_do_close"
This reverts commit e1b6eb3ccb.

This was causing a delay of 10 seconds in the resume process of a Thinkpad
laptop. I'm afraid this could affect more devices once 3.2 is released.

Reported-by: Tomáš Janoušek <tomi@nomi.cz>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-23 19:00:02 -02:00
David S. Miller
6350323ad8 Merge branch 'nf' of git://1984.lsi.us.es/net 2011-12-23 14:29:20 -05:00
Giuseppe Cavallaro
6fc0d0f2e3 stmmac: fix missing module license in the main.
This patch fixes the following warning raised
when compile:

WARNING: modpost: missing MODULE_LICENSE()
in drivers/net/ethernet/stmicro/stmmac/stmmac.o

Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-23 14:21:20 -05:00
Kukjin Kim
3fa754c298 ARM: 7248/1: S5PV210: introduce arch/arm/mach-s5pv210/common.[ch]
This patch introduces common.[ch] which are used only in the
arch/arm/mach-s5pv210/ directory. The common.c file merges
the cpu.c and init.c which are used commonly on S5PCV210/S5PC100
SoC and the common.h local header file replaces with plat/s5pv210.h
file.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 19:11:28 +00:00
Kukjin Kim
dd4153d9af ARM: 7247/1: S5PC100: introduce arch/arm/mach-s5pc100/common.[ch]
This patch introduces common.[ch] which are used only in the
arch/arm/mach-s5pc100/ directory. The common.c file merges
the cpu.c and init.c which are used commonly on S5PC100 SoC
and the common.h local header file replaces with plat/s5pc100.h
file.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 19:11:19 +00:00
Kukjin Kim
95af214bec ARM: 7246/1: S5P64X0: introduce arch/arm/mach-s5p64x0/common.[ch]
This patch introduces common.[ch] which are used only in the
arch/arm/mach-s5p64x0/ directory. The common.c file merges
the cpu.c, init.c and irq-eint.c files which are used commonly
on S5P64X0 SoCs and the common.h local header file replaces
with plat/s5p6440.h and plat/s5p6450.h files.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 19:11:05 +00:00
Kukjin Kim
b024043b6d ARM: 7245/1: S3C64XX: introduce arch/arm/mach-s3c64xx/common.[ch]
This patch introduces common.[ch] which are used only in the
arch/arm/mach-s3c64xx/ directory. The common.c file merges
the cpu.c, irq.c and irq-eint.c which are used commonly on
S3C64XX SoCs and the common.h file replaces with plat/s3c6400.h
and plat/s3c6410.h files.

Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-12-23 19:07:55 +00:00
Robert Richter
37a058ea00 perf script: Add generic perl handler to process events
The current perf scripting facility only supports tracepoints. This
patch implements a generic perl handler to support other events than
tracepoints too.

This patch introduces a function process_event() that is called by perf
for each sample. The function is called with byte streams as arguments
containing information about the event, its attributes, the sample and
raw data. Perl's unpack() function can easily be used for byte decoding.
The following is the default implementation for process_event() that can
also be generated with perf script:

 # Packed byte string args of process_event():
 #
 # $event:       union perf_event        util/event.h
 # $attr:        struct perf_event_attr  linux/perf_event.h
 # $sample:      struct perf_sample      util/event.h
 # $raw_data:    perf_sample->raw_data   util/event.h

 sub process_event
 {
         my ($event, $attr, $sample, $raw_data) = @_;

         my @event       = unpack("LSS", $event);
         my @attr        = unpack("LLQQQQQLLQQ", $attr);
         my @sample      = unpack("QLLQQQQQLL", $sample);
         my @raw_data    = unpack("C*", $raw_data);

         use Data::Dumper;
         print Dumper \@event, \@attr, \@sample, \@raw_data;
 }

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323969824-9711-4-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 17:05:48 -02:00
Robert Richter
b1e5a9bee3 perf tools: Use for_each_set_bit() to iterate over feature flags
This patch introduces the for_each_set_bit() macro and modifies feature
implementation to use it.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-8-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 17:03:36 -02:00
Robert Richter
e20960c027 perf tools: Unify handling of features when writing feature section
The features HEADER_TRACE_INFO and HEADER_BUILD_ID are handled
different when writing the feature section. All other features are
simply disabled on failure and writing the section goes on without
returning an error. There is no reason for these special cases. This
patch unifies handling of the features.

This should be ok since all features can be parsed independently.
Offset and size of a feature's block is stored in struct perf_file_
section right after the data block of perf.data (see perf_session__
write_header()). Thus, if a feature does not exist then other features
can be processed anyway.

Also moving special code for HEADER_BUILD_ID out to write_build_id().

v2:
* perf record throws an error now if buildids may not be generated,
  which can be disabled with the --no-buildid option.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-6-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 17:02:22 -02:00
Suresh Siddha
c284b42aba x86: Skip cpus with apic-ids >= 255 in !x2apic_mode
If the x2apic mode is disabled for reasons like interrupt-remapping
not available etc, then we need to skip the logical cpu bringup of
apic-id's >= 255. Otherwise as the platform is in xapic mode, init/startup
IPI's will consider only the low 8-bits and there is a possibility of
re-sending init/startup IPI's to the logical cpu that is already online.

This will avoid potential reboots/unpredictable behavior etc.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/r/20111222014632.702932458@sbsiddha-desk.sc.intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-12-23 11:01:49 -08:00
Yinghai Lu
a31bc32760 x86, x2apic: Allow "nox2apic" to disable x2apic mode setup by BIOS
Currently "nox2apic" boot parameter was not enabling x2apic mode if the cpu,
kernel are all capable of enabling x2apic mode and the OS handover
happened in xapic mode.

However If the bios enabled x2apic prior to OS handover, using "nox2apic"
boot parameter had no effect.

If the boot cpu's apicid is < 255, enable "nox2apic" boot parameter to
disable the x2apic mode setup by the bios. This will enable the kernel to
fallback to xapic mode and bringup only the cpu's which has apic-id < 255.

-v2: fix patch error and two compiling warning
	make disable_x2apic to be __init

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Link: http://lkml.kernel.org/r/CAE9FiQUeB-3uxJAMiHsz=uPWoFv5Hg1pVepz7aU6YtqOxMC-=Q@mail.gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-12-23 11:01:43 -08:00
Robert Richter
efad14150a perf report: Accept fifos as input file
The default input file for perf report is not handled the same way as
perf record does it for its output file. This leads to unexpected
behavior of perf report, etc. E.g.:

 # perf record -a -e cpu-cycles sleep 2 | perf report | cat
 failed to open perf.data: No such file or directory  (try 'perf record' first)

While perf record writes to a fifo, perf report expects perf.data to be
read. This patch changes this to accept fifos as input file.

Applies to the following commands:

 perf annotate
 perf buildid-list
 perf evlist
 perf kmem
 perf lock
 perf report
 perf sched
 perf script
 perf timechart

Also fixes char const* -> const char* type declaration for filename
strings.

v2:
* Prevent potential null pointer access to input_name in
  builtin-report.c. Needed due to removal of patch "perf report: Setup
  browser if stdout is a pipe"

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-5-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 17:01:03 -02:00
Yinghai Lu
fb209bd891 x86, x2apic: Fallback to xapic when BIOS doesn't setup interrupt-remapping
On some of the recent Intel SNB platforms, by default bios is pre-enabling
x2apic mode in the cpu with out setting up interrupt-remapping.
This case was resulting in the kernel to panic as the cpu is already in
x2apic mode but the OS was not able to enable interrupt-remapping (which
is a pre-req for using x2apic capability).

On these platforms all the apic-ids are < 255 and the kernel can fallback to
xapic mode if the bios has not enabled interrupt-remapping (which is
mostly the case if the bios has not exported interrupt-remapping tables to the
OS).

Reported-by: Berck E. Nash <flyboy@gmail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20111222014632.600418637@sbsiddha-desk.sc.intel.com
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-12-23 11:01:01 -08:00
Yinghai Lu
a35fd28256 x86, acpi: Skip acpi x2apic entries if the x2apic feature is not present
If the x2apic feature is not present (either the cpu is not capable of it
or the user has disabled the feature using boot-parameter etc), ignore the
x2apic MADT and SRAT entries provided by the ACPI tables.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20111222014632.540896503@sbsiddha-desk.sc.intel.com
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-12-23 11:00:50 -08:00
Yinghai Lu
e8524b2f43 x86, apic: Add probe() for apic_flat
Currently we start with the default apic_flat mode and switch to some other
apic model depending on the apic drivers acpi_madt_oem_check() routines and
later followed by the apic drivers probe() routines.

Once we selected non flat mode there was no case where we fall back to
flat mode again.

Upcoming changes allow bios-enabled x2apic mode to be disabled by the OS
if interrupt-remapping etc is not setup properly by the bios.

We now has a case for the apic to fall back to legacy flat mode during
apic driver probe() seqeuence. Add a simple flat_probe() which allows
the apic_flat mode to be the last fallback option.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/20111222014632.484984298@sbsiddha-desk.sc.intel.com
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2011-12-23 11:00:45 -08:00
Robert Richter
1b5495043d perf tools: Moving code in some files
Needed for later changes. No modified functionality.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-4-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:58:22 -02:00
Robert Richter
002c4fd92d perf tools: Fix out-of-bound access to struct perf_session
If filename is NULL there is an out-of-bound access to struct
perf_session if it would be used with perf_session__open(). Shouldn't
actually happen in current implementation as filename is always !NULL.
Fixing this by always null-terminating filename.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-3-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:57:41 -02:00
Robert Richter
f7a8a13364 perf tools: Continue processing header on unknown features
A feature may be unknown if perf.data is created and parsed on different
perf tool versions. This should not stop the header to be processed,
instead continue processing it.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-2-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:57:09 -02:00
Robert Richter
8cdfa78a88 perf tools: Improve macros for struct feature_ops
Reducing duplication and line size by extending function names for
print and write from a single name.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-7-git-send-email-robert.richter@amd.com
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:56:27 -02:00
Hemant Gupta
3573b80c42 Bluetooth: Incorrect address while storing LTK.
This patch fixes incorrect address storage while storing
Long Term Key for LE Devices using SMP (Security Manager Protocol).
The address stored should be of remote device and not of source device.

Signed-off-by: Hemant Gupta <hemant.gupta@stericsson.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2011-12-23 16:55:06 -02:00
Nelson Elhage
41d0d93349 perf: builtin-record: Document and check that mmap_pages must be a power of two.
Now that we automatically point users at it, let's provide them some
guidance so that they hopefully don't just get mysterious EINVAL's
from the kernel.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1324301972-22740-4-git-send-email-nelhage@nelhage.com
Signed-off-by: Nelson Elhage <nelhage@nelhage.com>
[ committer note: Made it work after 50a682c ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:53:58 -02:00
Nelson Elhage
18e6093904 perf: builtin-record: Provide advice if mmap'ing fails with EPERM.
This failure is most likely due to running up against the
kernel.perf_event_mlock_kb sysctl, so we can tell the user what to do to
fix the issue.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1324301972-22740-3-git-send-email-nelhage@nelhage.com
Signed-off-by: Nelson Elhage <nelhage@nelhage.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:44:34 -02:00
Ingo Molnar
f41612f43b perf tools: Fix truncated annotation
I get such truncated annotation results in 'perf top':

         :        Disassembly of section .text:                                                   ▒
         :                                                                                        ▒
         :        ffffffff810966a8 <nr_iowait_cpu>:                                               ▒
    4.94 :        ffffffff810966a8:       movslq %edi,%rdi                                        ▒
    3.70 :        ffffffff810966ab:       mov    $0x13700,%rax                                    ▒
    0.00 :        ffffffff810966b2:       add    -0x7e32cb00(,%rdi,8),%rax                        ▒
    8.64 :        ffffffff810966ba:       mov    0x7e0(%rax),%eax                                 ▒
   82.72 :        ffffffff810966c0:       cltq                                                    ▒

Note the missing 'retq' which is there in the original function:

ffffffff810966a8 <nr_iowait_cpu>:
ffffffff810966a8:       48 63 ff                movslq %edi,%rdi
ffffffff810966ab:       48 c7 c0 00 37 01 00    mov    $0x13700,%rax
ffffffff810966b2:       48 03 04 fd 00 35 cd    add    -0x7e32cb00(,%rdi,8),%rax
ffffffff810966b9:       81
ffffffff810966ba:       8b 80 e0 07 00 00       mov    0x7e0(%rax),%eax
ffffffff810966c0:       48 98                   cltq
ffffffff810966c2:       c3                      retq

ffffffff810966c3 <this_cpu_load>:

I'm using a fairly recent binutils:

  GNU objdump version 2.21.51.0.6-2.fc16 20110118

AFAICS the bug is simply that sym->end points to the last byte
of the symbol in question - while objdump's --stop-address
expects the last byte plus 1 to disassemble the full range.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20111223130804.GA24305@elte.hu
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23 16:39:19 -02:00