linux-toradex.git/kernel/irq/Kconfig, branch v3.16-rc5

genirq: Replace dynamic_irq_init/cleanup

2014-05-16T12:05:22+00:00

Create a new interface and confine it with a config switch which makes
clear that this is just legacy support and not to be used for new code.

Signed-off-by: Thomas Gleixner 
Reviewed-by: Grant Likely 
Tested-by: Tony Luck 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20140507154340.574437049@linutronix.de
Signed-off-by: Thomas Gleixner

genirq: Provide generic hwirq allocation facility

2014-05-16T12:05:18+00:00

Not really the solution to the problem, but at least it confines the
mess in the core code and allows to get rid of the create/destroy_irq
variants from hell, i.e. 3 implementations with different semantics
plus the x86 specific variants __create_irqs and create_irq_nr
which have been invented in another circle of hell.

x86 : x86 should be converted to irq domains and I'm deliberately
      making it impossible to do the multi-vector MSI support by
      adding more crap to the current mess. It's not that hard to do
      and I'm really tired of the trainwrecks which have been invented
      by baindaid engineering so far. Any attempt to do multi-vector
      MSI or ioapic hotplug without converting to irq domains is NAKed
      hereby.

tile: Might use irq domains as well, but it has a very limited
      interrupt space, so handling it via this functionality might be
      the right thing to do even in the long run.

ia64: That's an hopeless case, as I doubt that anyone has the stomach
      to rewrite the homebrewn dynamic allocation facilities. I stared
      at it for a couple of hours and gave up. The create/destroy_irq
      mess could be made private to itanic right away if there
      wouldn't be the iommu/dmar driver being shared with x86. So to
      do that I'm going to add a separate ia64 specific implementation
      later in order not to deep-six itanic right away.

Signed-off-by: Thomas Gleixner 
Reviewed-by: Grant Likely 
Cc: Tony Luck 
Cc: Peter Zijlstra 
Cc: Chris Metcalf 
Cc: Fenghua Yu 
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/20140507154334.208629358@linutronix.de
Signed-off-by: Thomas Gleixner

genirq: Generic irq chip requires IRQ_DOMAIN

2014-02-05T09:17:32+00:00

The generic_chip.c uses interfaces from irq_domain.c which is
controlled by the IRQ_DOMAIN config option, but there is no Kconfig
dependency so the build can fail:

linux/kernel/irq/generic-chip.c:400:11: error:
'irq_domain_xlate_onetwocell' undeclared here (not in a function)

Select IRQ_DOMAIN when GENERIC_IRQ_CHIP is selected.

Signed-off-by: Nitin A Kamble 
Link: http://lkml.kernel.org/r/1391129410-54548-2-git-send-email-nitin.a.kamble@intel.com
Signed-off-by: Thomas Gleixner 
Cc: stable@vger.kernel.org # 3.11+

Remove GENERIC_HARDIRQ config option

2013-09-13T13:09:52+00:00

After the last architecture switched to generic hard irqs the config
options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code
for !CONFIG_GENERIC_HARDIRQS can be removed.

Signed-off-by: Martin Schwidefsky

irq_domain: correct the debugfs file name

2012-04-11T04:39:17+00:00

The actual name of the irq_domain mapping debugfs file is
"irq_domain_mapping" not "virq_mapping".

Signed-off-by: Mika Westerberg 
Signed-off-by: Grant Likely

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

2012-03-29T23:53:48+00:00

Pull more ARM updates from Russell King.

This got a fair number of conflicts with the  split, but
also with some other sparse-irq and header file include cleanups.  They
all looked pretty trivial, though.

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (59 commits)
  ARM: fix Kconfig warning for HAVE_BPF_JIT
  ARM: 7361/1: provide XIP_VIRT_ADDR for no-MMU builds
  ARM: 7349/1: integrator: convert to sparse irqs
  ARM: 7259/3: net: JIT compiler for packet filters
  ARM: 7334/1: add jump label support
  ARM: 7333/2: jump label: detect %c support for ARM
  ARM: 7338/1: add support for early console output via semihosting
  ARM: use set_current_blocked() and block_sigmask()
  ARM: exec: remove redundant set_fs(USER_DS)
  ARM: 7332/1: extract out code patch function from kprobes
  ARM: 7331/1: extract out insn generation code from ftrace
  ARM: 7330/1: ftrace: use canonical Thumb-2 wide instruction format
  ARM: 7351/1: ftrace: remove useless memory checks
  ARM: 7316/1: kexec: EOI active and mask all interrupts in kexec crash path
  ARM: Versatile Express: add NO_IOPORT
  ARM: get rid of asm/irq.h in asm/prom.h
  ARM: 7319/1: Print debug info for SIGBUS in user faults
  ARM: 7318/1: gic: refactor irq_start assignment
  ARM: 7317/1: irq: avoid NULL check in for_each_irq_desc loop
  ARM: 7315/1: perf: add support for the Cortex-A7 PMU
  ...

irqdomain: Remove powerpc dependency from debugfs file

2012-03-29T20:31:02+00:00

The debugfs code is really generic for all platforms.  This patch removes the
powerpc-specific directory reference and makes it available to all
architectures.

Signed-off-by: Grant Likely

irq: make SPARSE_IRQ an optionally hidden option

2012-01-26T02:37:42+00:00

On ARM, we don't want SPARSE_IRQ to be a user visible option. Make
SPARSE_IRQ visible based on MAY_HAVE_SPARSE_IRQ instead of depending
on HAVE_SPARSE_IRQ.

With this, SPARSE_IRQ is not visible on C6X and ARM.

Signed-off-by: Rob Herring 
Cc: Russell King 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Paul Mundt 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-sh@vger.kernel.org

irq: add irq_domain translation infrastructure

2011-07-28T07:32:04+00:00

This patch adds irq_domain infrastructure for translating from
hardware irq numbers to linux irqs.  This is particularly important
for architectures adding device tree support because the current
implementation (excluding PowerPC and SPARC) cannot handle
translation for more than a single interrupt controller.  irq_domain
supports device tree translation for any number of interrupt
controllers.

This patch converts x86, Microblaze, ARM and MIPS to use irq_domain
for device tree irq translation.  x86 is untested beyond compiling it,
irq_domain is enabled for MIPS and Microblaze, but the old behaviour is
preserved until the core code is modified to actually register an
irq_domain yet.  On ARM it works and is required for much of the new
ARM device tree board support.

PowerPC has /not/ been converted to use this new infrastructure.  It
is still missing some features before it can replace the virq
infrastructure already in powerpc (see documentation on
irq_domain_map/unmap for details).  Followup patches will add the
missing pieces and migrate PowerPC to use irq_domain.

SPARC has its own method of managing interrupts from the device tree
and is unaffected by this change.

Acked-by: Ralf Baechle 
Signed-off-by: Grant Likely

genirq: Make generic irq chip depend on CONFIG_GENERIC_IRQ_CHIP

2011-05-02T16:16:22+00:00

Only compile it in when there are users.

Signed-off-by: Thomas Gleixner 
Cc: linux-arm-kernel@lists.infradead.org