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2012-11-19ARM: kernel: add logical mappings look-upLorenzo Pieralisi
In ARM SMP systems the MPIDR register ([23:0] bits) is used to uniquely identify CPUs. In order to retrieve the logical CPU index corresponding to a given MPIDR value and guarantee a consistent translation throughout the kernel, this patch adds a look-up based on the MPIDR[23:0] so that kernel subsystems can use it whenever the logical cpu index corresponding to a given MPIDR value is needed. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19ARM: kernel: add cpu logical map DT init in setup_archLorenzo Pieralisi
As soon as the device tree is unflattened the cpu logical to physical mapping is carried out in setup_arch to build a proper array of MPIDR and corresponding logical indexes. The mapping could have been carried out using the flattened DT blob and related primitives, but since the mapping is not needed by early boot code it can safely be executed when the device tree has been uncompressed to its tree data structure. This patch adds the arm_dt_init_cpu maps() function call in setup_arch(). If the kernel is not compiled with DT support the function is empty and no logical mapping takes place through it; the mapping carried out in smp_setup_processor_id() is left unchanged. If DT is supported the mapping created in smp_setup_processor_id() is overriden. The DT mapping also sets the possible cpus mask, hence platform code need not set it again in the respective smp_init_cpus() functions. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19ARM: kernel: add device tree init map functionLorenzo Pieralisi
When booting through a device tree, the kernel cpu logical id map can be initialized using device tree data passed by FW or through an embedded blob. This patch adds a function that parses device tree "cpu" nodes and retrieves the corresponding CPUs hardware identifiers (MPIDR). It sets the possible cpus and the cpu logical map values according to the number of CPUs defined in the device tree and respective properties. The device tree HW identifiers are considered valid if all CPU nodes contain a "reg" property, there are no duplicate "reg" entries and the DT defines a CPU node whose "reg" property matches the MPIDR[23:0] of the boot CPU. The primary CPU is assigned cpu logical number 0 to keep the current convention valid. Current bindings documentation is included in the patch: Documentation/devicetree/bindings/arm/cpus.txt Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19ARM: kernel: smp_setup_processor_id() updatesLorenzo Pieralisi
This patch applies some basic changes to the smp_setup_processor_id() ARM implementation to make the code that builds cpu_logical_map more uniform across the kernel. The function now prints the full extent of the boot CPU MPIDR[23:0] and initializes the cpu_logical_map for CPUs up to nr_cpu_ids. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com>
2012-11-19ARM: kernel: update topology to use new MPIDR macrosLorenzo Pieralisi
This patch updates the topology initialization code to use the newly defined accessors to retrieve the MPIDR affinity levels. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19ARM: kernel: enhance MPIDR macro definitionsLorenzo Pieralisi
Kernel subsystems other than the topology layer need the MPIDR mask definitions to access the MPIDR without relying on hardcoded masks. This patch moves the MPIDR register masks definition to a header file and defines a macro to simplify access to MPIDR bit fields representing affinity levels. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19vtime: Consolidate a bit the ctx switch codeFrederic Weisbecker
On ia64 and powerpc, vtime context switch only consists in flushing system and user pending time, plus a few arch housekeeping. Consolidate that into a generic implementation. s390 is a special case because pending user and system time accounting there is hard to dissociate. So it's keeping its own implementation. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-11-19vtime: Explicitly account pending user time on process tickFrederic Weisbecker
All vtime implementations just flush the user time on process tick. Consolidate that in generic code by calling a user time accounting helper. This avoids an indirect call in ia64 and prepare to also consolidate vtime context switch code. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-11-19vtime: Remove the underscore prefix invasionFrederic Weisbecker
Prepending irq-unsafe vtime APIs with underscores was actually a bad idea as the result is a big mess in the API namespace that is even waiting to be further extended. Also these helpers are always called from irq safe callers except kvm. Just provide a vtime_account_system_irqsafe() for this specific case so that we can remove the underscore prefix on other vtime functions. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-11-19ARM: kernel: update cpuinfo to print all online CPUs featuresLorenzo Pieralisi
Currently, reading /proc/cpuinfo provides userspace with CPU ID of the CPU carrying out the read from the file. This is fine as long as all CPUs in the system are the same. With the advent of big.LITTLE and heterogenous ARM systems this approach provides user space with incorrect bits of information since CPU ids in the system might differ from the one provided by the CPU reading the file. This patch updates the cpuinfo show function so that a read from /proc/cpuinfo prints HW information for all online CPUs at once, mirroring x86 behaviour. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19ARM: kernel: add MIDR to per-CPU information dataLorenzo Pieralisi
The advent of big.LITTLE ARM platforms requires the kernel to be able to identify the MIDRs of all online CPUs upon request. MIDRs are stashed at boot time so that kernel subsystems can detect the MIDR of online CPUs by simply retrieving per-CPU data updated by all booted CPUs. Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Nicolas Pitre <nico@linaro.org>
2012-11-19ARM: 7580/1: arch/select HAVE_ARCH_SECCOMP_FILTERWill Drewry
Reflect architectural support for seccomp filter. Signed-off-by: Will Drewry <wad@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-11-19ARM: 7579/1: arch/allow a scno of -1 to not cause a SIGILLKees Cook
On tracehook-friendly platforms, a system call number of -1 falls through without running much code or taking much action. ARM is different. This adds a short-circuit check in the trace path to avoid any additional work, as suggested by Russell King, to make sure that ARM behaves the same way as other platforms. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Will Drewry <wad@chromium.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-11-19ARM: 7578/1: arch/move secure_computing into traceKees Cook
There is very little difference in the TIF_SECCOMP and TIF_SYSCALL_WORK path in entry-common.S, so merge TIF_SECCOMP into TIF_SYSCALL_WORK and move seccomp into the syscall_trace_enter() handler. Expanded some of the tracehook logic into the callers to make this code more readable. Since tracehook needs to do register changing, this portion is best left in its own function instead of copy/pasting into the callers. Additionally, the return value for secure_computing() is now checked and a -1 value will result in the system call being skipped. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Will Drewry <wad@chromium.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-11-19ARM: 7577/1: arch/add syscall_get_archWill Drewry
Provide an ARM implementation of syscall_get_arch. This is a pre-requisite for CONFIG_HAVE_ARCH_SECCOMP_FILTER. Signed-off-by: Will Drewry <wad@chromium.org> Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2012-11-19pidns: Use task_active_pid_ns where appropriateEric W. Biederman
The expressions tsk->nsproxy->pid_ns and task_active_pid_ns aka ns_of_pid(task_pid(tsk)) should have the same number of cache line misses with the practical difference that ns_of_pid(task_pid(tsk)) is released later in a processes life. Furthermore by using task_active_pid_ns it becomes trivial to write an unshare implementation for the the pid namespace. So I have used task_active_pid_ns everywhere I can. In fork since the pid has not yet been attached to the process I use ns_of_pid, to achieve the same effect. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
2012-11-19Fix misspellings of "whether" in comments.Adam Buchbinder
"Whether" is misspelled in various comments across the tree; this fixes them. No code changes. Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19various: Fix spelling of "registered" in comments.Adam Buchbinder
Some comments misspell "registered"; this fixes them. No code changes. Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19treewide: fix typo of "suport" in various comments and KconfigMasanari Iida
Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19treewide: fix typo of "suppport" in various commentsMasanari Iida
Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19x86: remove offsets.h from .gitignore and dontdiffPaul Bolle
Commit 77d1a4999502c260df0eb2de437d320bf8c64b36 ("x86, boot: make symbols from the main vmlinux available") removed all traces of offsets.h from the tree. Remove its entries in dontdiff and x86/boot's .gitignore file too. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19Merge branch 'execve' into upstreamCatalin Marinas
* execve: arm64: get rid of fork/vfork/clone wrappers
2012-11-19Merge remote-tracking branch 'viro/arch-arm64' into execveCatalin Marinas
* viro/arch-arm64: arm64: get rid of fork/vfork/clone wrappers
2012-11-19Merge branch 'asid-allocation' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2012-11-19Merge branch 'for-rmk/prot-none' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2012-11-19Merge branch 'hw-breakpoint' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2012-11-19Merge branch 'perf/updates' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2012-11-19userns: On mips modify check_same_owner to use uid_eqEric W. Biederman
The kbuild test robot <fengguang.wu@intel.com> report the following error when building mips with user namespace support enabled. All error/warnings: arch/mips/kernel/mips-mt-fpaff.c: In function 'check_same_owner': arch/mips/kernel/mips-mt-fpaff.c:53:22: error: invalid operands to binary == (have 'kuid_t' and 'kuid_t') arch/mips/kernel/mips-mt-fpaff.c:54:15: error: invalid operands to binary == (have 'kuid_t' and 'kuid_t') Replace "a == b" with uid_eq(a, b) removes this error and allows the code to work with user namespaces enabled. Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
2012-11-19x86_32: Return actual stack when requesting sp from regsSteven Rostedt
As x86_32 traps do not save sp when taken in kernel mode, we need to accommodate the sp when requesting to get the register. This affects kprobes. Before: # echo 'p:ftrace sys_read+4 s=%sp' > /debug/tracing/kprobe_events # echo 1 > /debug/tracing/events/kprobes/enable # cat trace sshd-1345 [000] d... 489.117168: ftrace: (sys_read+0x4/0x70) s=b7e96768 sshd-1345 [000] d... 489.117191: ftrace: (sys_read+0x4/0x70) s=b7e96768 cat-1447 [000] d... 489.117392: ftrace: (sys_read+0x4/0x70) s=5a7 cat-1447 [001] d... 489.118023: ftrace: (sys_read+0x4/0x70) s=b77ad05f less-1448 [000] d... 489.118079: ftrace: (sys_read+0x4/0x70) s=b7762e06 less-1448 [000] d... 489.118117: ftrace: (sys_read+0x4/0x70) s=b7764970 After: sshd-1352 [000] d... 362.348016: ftrace: (sys_read+0x4/0x70) s=f3febfa8 sshd-1352 [000] d... 362.348048: ftrace: (sys_read+0x4/0x70) s=f3febfa8 bash-1355 [001] d... 362.348081: ftrace: (sys_read+0x4/0x70) s=f5075fa8 sshd-1352 [000] d... 362.348082: ftrace: (sys_read+0x4/0x70) s=f3febfa8 sshd-1352 [000] d... 362.690950: ftrace: (sys_read+0x4/0x70) s=f3febfa8 bash-1355 [001] d... 362.691033: ftrace: (sys_read+0x4/0x70) s=f5075fa8 Link: http://lkml.kernel.org/r/1342208654.30075.22.camel@gandalf.stny.rr.com Reviewed-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2012-11-19treewide: fix printk typo in multiple driversMasanari Iida
Correct spelling typo in multiple drivers. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2012-11-19i2c: i2c-cbus-gpio: introduce driverAaro Koskinen
Add i2c driver to enable access to devices behind CBUS on Nokia Internet Tablets. The patch also adds CBUS I2C configuration for N8x0 which is one of the users of this driver. Acked-by: Felipe Balbi <balbi@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2012-11-19ARM: davinci: dm644x: fix out range signal for EDLad, Prabhakar
Fix the video clock setting when custom timings are used with pclock <= 27MHz. Existing video clock selection uses PLL2 mode which results in a 54MHz clock whereas using the MXI mode results in a 27MHz clock (which is the one actually desired). This bug affects the Enhanced Definition (ED) support on DM644x. Without this patch, out-range signals errors are were observed on the TV when viewing ED. An out-of-range signal is often caused when the field rate is above the rate that the television will handle. Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com> Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com> Cc: Sekhar Nori <nsekhar@ti.com> [nsekhar@ti.com: reword commit message based on on-list discussion] Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2012-11-19ARM: EXYNOS: Remove i2c0 resource information and setting of device namesThomas Abraham
All EXYNOS5 based platforms support only device tree based boot and so the unused non-dt code that sets i2c0 resource information and device names for sdhci and i2c platform devices are removed. Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-11-19Merge branch 'next/dt-exynos4x12' into next/dt-samsungKukjin Kim
Conflicts: arch/arm/boot/dts/exynos4210.dtsi
2012-11-19ARM: Kirkwood: checkpatch cleanupsAndrew Lunn
Mostly printk to pr_{err|info} changes and a few strings split over multiple lines are combined. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2012-11-19ARM: Kirkwood: Fix sparse warnings.Andrew Lunn
Mostly missing statics, but also missing include files and void parameters. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2012-11-19ARM: Kirkwood: Remove unused includesAndrew Lunn
With the gradual conversion of C code to DT, there are a number of include files which are no longer needed. Remove them. Signed-off-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2012-11-19ARM: kirkwood: cleanup lsxl board includesMichael Walle
Remove unneeded includes. These are leftovers from platform device registrations. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2012-11-18ab8500: Add devicetree support for chargalgRajanikanth H.V
This patch adds device tree support for charging algorithm driver Signed-off-by: Rajanikanth H.V <rajanikanth.hv@stericsson.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-11-18ab8500: Add devicetree support for chargerRajanikanth H.V
This patch adds device tree support for ab8500-charger driver Signed-off-by: Rajanikanth H.V <rajanikanth.hv@stericsson.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-11-18ab8500: Add devicetree support for btempRajanikanth H.V
This patch adds device tree support for battery-temperature-monitor driver Signed-off-by: Rajanikanth H.V <rajanikanth.hv@stericsson.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-11-18ab8500: Add devicetree support for fuelgaugeRajanikanth H.V
- This patch adds device tree support for fuelgauge driver - optimize bm devices platform_data usage and of_probe(...) Note: of_probe() routine for battery managed devices is made common across all bm drivers. - test status: - interrupt numbers assigned differs between legacy and FDT mode. Signed-off-by: Rajanikanth H.V <rajanikanth.hv@stericsson.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-11-18sparc64: not any error from do_sigaltstack() should fail rt_sigreturn()Al Viro
If a signal handler is executed on altstack and another signal comes, we will end up with rt_sigreturn() on return from the second handler getting -EPERM from do_sigaltstack(). It's perfectly OK, since we are not asking to change the settings; in fact, they couldn't have been changed during the second handler execution exactly because we'd been on altstack all along. 64bit sigreturn on sparc treats any error from do_sigaltstack() as "SIGSEGV now"; we need to switch to the same semantics we are using on other architectures. Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-19ARM: dts: Add nodes for pin controllers for exynos4x12Tomasz Figa
This patch adds nodes for pin controllers available on EXYNOS4X12 SoCs supported by pinctrl-samsung driver. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Acked-by: Thomas Abraham <thomas.abraham@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2012-11-19Merge branch 'next/pinctrl-samsung' into next/dt-exynos4x12Kukjin Kim
2012-11-19Merge remote-tracking branch 'pinctrl/samsung' into next/pinctrl-samsungKukjin Kim
2012-11-19ARM: at91: add Somfy Animeo IP board supportJean-Christophe PLAGNIOL-VILLARD
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2012-11-19ARM: AT91: Add AT91RM9200EK board device treeJoachim Eastwood
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2012-11-19ARM: AT91: Add AT91RM9200 device treeJoachim Eastwood
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
2012-11-19ARM: AT91: Add AT91RM9200 DT boardJoachim Eastwood
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>