| d4dcc857a55bb7d6ac57d7a2e9ecd31d8d68f41a |
|
19-Oct-2011 |
Dima Zavin <dima@android.com> |
ARM: smp: implement arch_trigger_all_cpus_backtrace using IPI
Based on a rough patch by frank.rowand@am.sony.com
Since ARM doesn't have an NMI (fiq's are not always available),
send an IPI to all other CPUs (current cpu prints the stack directly)
to capture a backtrace.
Change-Id: I8b163c8cec05d521b433ae133795865e8a33d4e2
Signed-off-by: Dima Zavin <dima@android.com>
|
| 084bb5bc00c19ec32b45f44d11ba6a0ca2514ec3 |
|
20-Aug-2014 |
Geert Uytterhoeven <geert@linux-m68k.org> |
ARM: 8131/1: arm/smp: Absorb boot_secondary()
After becoming a mandatory function, boot_secondary() is no longer used
outside arch/arm/kernel/smp.c. Hence remove its public prototype, and,
as suggested by Arnd, let it be absorbed by its single caller.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 1146b600044de64af0ef775025731eeef1fa2189 |
|
16-Mar-2014 |
Arnd Bergmann <arnd@arndb.de> |
ARM: sunxi: fix build for THUMB2_KERNEL
Building an SMP kernel for the sunxi platform with THUMB2 instructions
fails with this error at the moment:
headsmp.S:7: Error: Thumb encoding does not support an immediate here -- `msr cpsr_fsxc,#0xd3'
Since the generic secondary_startup function already does
the same thing in a safe way, we can just drop the private
sunxi implementation and jump straight to secondary_startup.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
|
| 6c3ff8b11a16ec69199ab85b74a5fae6d9c59db7 |
|
31-Oct-2013 |
Stephen Boyd <sboyd@codeaurora.org> |
ARM: Introduce CPU_METHOD_OF_DECLARE() for cpu hotplug/smp
The goal of multi-platform kernels is to remove the need for mach
directories and machine descriptors. To further that goal,
introduce CPU_METHOD_OF_DECLARE() to allow cpu hotplug/smp
support to be separated from the machine descriptors.
Implementers should specify an enable-method property in their
cpus node and then implement a matching set of smp_ops in their
hotplug/smp code, wiring it up with the CPU_METHOD_OF_DECLARE()
macro. When the kernel is compiled we'll collect all the
enable-method smp_ops into one section for use at boot.
At boot time we'll look for an enable-method in each cpu node and
try to match that against all known CPU enable methods in the
kernel. If there are no enable-methods in the cpu nodes we
fallback to the cpus node and try to use any enable-method found
there. If that doesn't work we fall back to the old way of using
the machine descriptor.
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: <devicetree@vger.kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
|
| 5135d875e1457ef946a055003d8f80713e862135 |
|
28-Nov-2012 |
Nicolas Pitre <nicolas.pitre@linaro.org> |
ARM: SMP: basic IPI triggered completion support
We need a mechanism to let an inbound CPU signal that it is alive before
even getting into the kernel environment i.e. from early assembly code.
Using an IPI is the simplest way to achieve that.
This adds some basic infrastructure to register a struct completion
pointer to be "completed" when the dedicated IPI for this task is
received.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
|
| eb08375ea66e63c5e11dea69b43c5633d531ce81 |
|
22-Feb-2013 |
Jonathan Austin <jonathan.austin@arm.com> |
ARM: mpu: add MPU initialisation for secondary cores
The MPU initialisation on the primary core is performed in two stages, one
minimal stage to ensure the CPU can boot and a second one after
sanity_check_meminfo. As the memory configuration is known by the time we
boot secondary cores only a single step is necessary, provided the values
for DRSR are passed to secondaries.
This patch implements this arrangement. The configuration generated for the
MPU regions is made available to the secondary core, which can then use the
asm MPU intialisation code to program a complete region configuration.
This is necessary for SMP configurations without an MMU, as the MPU
initialisation is the only way to ensure that memory is specified as
'shared'.
Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
CC: Nicolas Pitre <nico@linaro.org>
|
| b62655f4c6f3e4d21934eee14ac2ac5cd479c97c |
|
06-Nov-2012 |
Shawn Guo <shawn.guo@linaro.org> |
ARM: 7571/1: SMP: add function arch_send_wakeup_ipi_mask()
Add function arch_send_wakeup_ipi_mask(), so that platform code can
use it as an easy way to wake up cores that are in WFI.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 28e8e29c616f947348cc66bea684d0035c76021a |
|
12-Jun-2012 |
Marc Zyngier <marc.zyngier@arm.com> |
ARM: consolidate pen_release instead of having per platform definitions
Almost each SMP platform defines pen_release to manage booting secondary
CPUs. This of course clashes with the single zImage effort.
Add the pen_release definition to the ARM SMP code, and remove all others.
This should only be used by platforms which lack any kind of CPU power
management...
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
|
| ac6c7998712d55bd15aa2dd5ae85f5988c0cb526 |
|
27-Sep-2011 |
Marc Zyngier <marc.zyngier@arm.com> |
ARM: smp: Make SMP operations mandatory
Now that all SMP platforms have been converted to use struct
smp_operations, remove the "weak" attribute from the hooks
in smp.c, and make the functions static wherever possible.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
|
| abcee5fb0dfbb248d883a2f6bdb4820abe3ac524 |
|
08-Sep-2011 |
Marc Zyngier <marc.zyngier@arm.com> |
ARM: SoC: add per-platform SMP operations
This adds a 'struct smp_operations' to abstract the CPU initialization
and hot plugging functions on SMP systems, which otherwise conflict
in a multiplatform kernel. This also helps shmobile and potentially
others that have more than one method to do these.
To allow the kernel to continue building, the platform hooks are
defined as weak symbols which are overrided by the platform code.
Once all platforms are converted, the "weak" attribute will be
removed and the function made static.
Unlike the original version from Marc, this new version from Arnd
does not use a generalized abstraction for per-soc data structures
but only tries to solve the problem for the SMP operations. This
way, we can collapse the previous four data structures into a
single struct, which is less systematic but also easier to follow
as a causal reader.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
|
| eb50439b92b6298bf209a982f295ba9c0f7cb30b |
|
20-Jan-2012 |
Will Deacon <will.deacon@arm.com> |
ARM: 7293/1: logical_cpu_map: decouple CPU mapping from SMP
It turns out that the logical CPU mapping is useful even when !CONFIG_SMP
for manipulation of devices like interrupt and power controllers when
running a UP kernel on a CPU other than 0. This can happen when kexecing
a UP image from an SMP kernel.
In the future, multi-cluster systems running AMP configurations will
require something similar for mapping cluster IDs, so it makes sense to
decouple this logic in preparation for this support.
Acked-by: Yang Bai <hamo.by@gmail.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Reported-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 292b293ceef2eda1f96f0c90b96e954d7bdabd1c |
|
20-Jul-2011 |
Marc Zyngier <marc.zyngier@arm.com> |
ARM: gic: consolidate PPI handling
PPI handling is a bit of an odd beast. It uses its own low level
handling code and is hardwired to the local timers (hence lacking
a registration interface).
Instead, switch the low handling to the normal SPI handling code.
PPIs are handled by the handle_percpu_devid_irq flow.
This also allows the removal of some duplicated code.
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Brown <davidb@codeaurora.org>
Tested-by: David Brown <davidb@codeaurora.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
|
| 0b5a1b95dcdfa451125132d5ce3f79a27ffb0950 |
|
06-Oct-2011 |
Shawn Guo <shawn.guo@linaro.org> |
ARM: 7123/1: smp: Add an IPI handler callable from C code
In order to be able to handle IPI directly from C code instead of
assembly code, introduce handle_IPI(), which is modeled after handle_IRQ().
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| d6257288c4052465feeff7e283e35ec0ed06ca03 |
|
23-Aug-2011 |
Will Deacon <will.deacon@arm.com> |
ARM: 7060/1: smp: populate logical CPU mapping during boot
To allow booting Linux on a CPU with physical ID != 0, we need to
provide a mapping from the logical CPU number to the physical CPU
number.
This patch adds such a mapping and populates it during boot.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| d427958a46af24f75d0017c45eadd172273bbf33 |
|
26-May-2011 |
Catalin Marinas <catalin.marinas@arm.com> |
ARM: 6942/1: mm: make TTBR1 always point to swapper_pg_dir on ARMv6/7
This patch makes TTBR1 point to swapper_pg_dir so that global, kernel
mappings can be used exclusively on v6 and v7 cores where they are
needed.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 818b667ba57f68bf1e7240fa441dda0b11e6b944 |
|
25-May-2011 |
Stephen Boyd <sboyd@codeaurora.org> |
Remove unused PROC_CHANGE_PENALTY constant
This constant hasn't been used since before the git era (2.6.12) and thus
can be dropped.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Richard Weinberger <richard@nod.at>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
| 0f7b332f9777819a39a3b325690379a7efef89d1 |
|
03-Apr-2011 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: consolidate SMP cross call implementation
Rather than having each platform class provide a mach/smp.h header for
smp_cross_call(), arrange for them to register the function with the
core ARM SMP code instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 05c74a6cbcfb416286a947668ba32f63d99fe74a |
|
03-Dec-2010 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: SMP: consolidate the common parts of smp_prepare_cpus()
There is a certain amount of smp_prepare_cpus() which doesn't belong
in the platform support code - that is, code which is invariant to the
SMP implementation. Move this code into arch/arm/kernel/smp.c, and
add a platform_ prefix to the original function.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| f13cd4170ee789f63b3c9585c1ae34e028bd549d |
|
15-Nov-2010 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: fix /proc/interrupts formatting
As per x86, align the initial column according to how many IRQs we
have. Also, provide an english explaination for the 'LOC:' and
'IPI:' lines.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| ad3b6993b9c5482e8a2ec5aed181538c921fdcbd |
|
15-Nov-2010 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: SMP: pass an ipi number to smp_cross_call()
This allows us to use smp_cross_call() to trigger a number of different
software generated interrupts, rather than combining them all on one
SGI. Recover the SGI number via do_IPI.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 8e2a43f5f5e1255879064924917fb1a6e5be7cb3 |
|
15-May-2010 |
Russell King <rmk+kernel@arm.linux.org.uk> |
ARM: rename mach_cpu_disable() to platform_cpu_disable()
Consistently name all SMP platform related functions.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 0748bd01773395003208996c4c0b3f80caf80976 |
|
24-Sep-2009 |
Rusty Russell <rusty@rustcorp.com.au> |
cpumask: remove arch_send_call_function_ipi
Now everyone is converted to arch_send_call_function_ipi_mask, remove
the shim and the #defines.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
|
| e03cdade0ca945a04e982525e50fef275190b77b |
|
28-May-2009 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] smp: use new cpumask functions
Convert cpu_*_mask bit twiddling to the new set_cpu_*() API.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| bc28248ee25e5c239cbe6afca35a100b08401de5 |
|
17-May-2009 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] smp: move core localtimer support out of platform specific files
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 826681043d7184b4d650cab5b007b9a86b628eb5 |
|
17-May-2009 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] smp: fix cpumask usage in ARM SMP code
The ARM SMP code wasn't properly updated for the cpumask changes, which
results in smp_timer_broadcast() broadcasting ticks to non-online CPUs.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| ebac6546df7e8bd17f66f029c616ea9ee3c595ae |
|
01-Dec-2008 |
Catalin Marinas <catalin.marinas@arm.com> |
RealView: Use only the shadow mapping of ARM11MPCore local timers
All the cases where the local timer for a CPU is accessed happen on the
corresponding current CPU, hence no need to access the per-CPU local
timer mappings.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
|
| a09e64fbc0094e3073dbb09c3b4bfe4ab669244b |
|
05-Aug-2008 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach
This just leaves include/asm-arm/plat-* to deal with.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|
| 4baa9922430662431231ac637adedddbb0cfb2d7 |
|
02-Aug-2008 |
Russell King <rmk@dyn-67.arm.linux.org.uk> |
[ARM] move include/asm-arm to arch/arm/include/asm
Move platform independent header files to arch/arm/include/asm, leaving
those in asm/arch* and asm/plat* alone.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
|