linux/kernel/irq/Kconfig, branch v3.2.18

irq: add irq_domain translation infrastructure

2011-07-28T07:32:04Z

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

2011-05-02T16:16:22Z

Only compile it in when there are users. Signed-off-by: Thomas Gleixner Cc: linux-arm-kernel@lists.infradead.org

genirq: Remove the now obsolete config options and select statements

2011-03-30T12:13:23Z

Signed-off-by: Thomas Gleixner

genirq: Remove compat code

2011-03-29T12:48:19Z

Signed-off-by: Thomas Gleixner

genirq: Provide edge_eoi flow handler

2011-03-28T14:55:11Z

This is a replacment for the cell flow handler which is in the way of cleanups. Must be selected to avoid general bloat. Signed-off-by: Thomas Gleixner

genirq: Expand generic show_interrupts()

2011-03-25T16:04:20Z

Some archs want to print extra information for certain irq_chips which is per irq and not per chip. Allow them to provide a chip callback to print the chip name and the extra information. PowerPC wants to print the LEVEL/EDGE type information. Make it configurable. Signed-off-by: Thomas Gleixner

genirq: Add comments to Kconfig switches

2011-03-08T18:52:55Z

Signed-off-by: Thomas Gleixner Cc: Sam Ravnborg

genirq: Provide forced interrupt threading

2011-02-26T10:57:18Z

Add a commandline parameter "threadirqs" which forces all interrupts except those marked IRQF_NO_THREAD to run threaded. That's mostly a debug option to allow retrieving better debug data from crashing interrupt handlers. If "threadirqs" is not enabled on the kernel command line, then there is no impact in the interrupt hotpath. Architecture code needs to select CONFIG_IRQ_FORCED_THREADING after marking the interrupts which cant be threaded IRQF_NO_THREAD. All interrupts which have IRQF_TIMER set are implict marked IRQF_NO_THREAD. Also all PER_CPU interrupts are excluded. Forced threading hard interrupts also forces all soft interrupt handling into thread context. When enabled it might slow down things a bit, but for debugging problems in interrupt code it's a reasonable penalty as it does not immediately crash and burn the machine when an interrupt handler is buggy. Some test results on a Core2Duo machine: Cache cold run of: # time git grep irq_desc non-threaded threaded real 1m18.741s 1m19.061s user 0m1.874s 0m1.757s sys 0m5.843s 0m5.427s # iperf -c server non-threaded [ 3] 0.0-10.0 sec 1.09 GBytes 933 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 934 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 933 Mbits/sec threaded [ 3] 0.0-10.0 sec 1.09 GBytes 939 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 934 Mbits/sec [ 3] 0.0-10.0 sec 1.09 GBytes 937 Mbits/sec Signed-off-by: Thomas Gleixner Cc: Peter Zijlstra LKML-Reference: <20110223234956.772668648@linutronix.de>

genirq: Streamline kernel/irq/Kconfig

2011-02-22T21:33:10Z

"def_bool n" without prompt is pointless, these should be just "bool". [ tglx: Adapted to latest changes ] Signed-off-by: Jan Beulich LKML-Reference: <4D5D3309020000780003264A@vpn.id2.novell.com> Signed-off-by: Thomas Gleixner

genirq: Add preflow handler support

2011-02-19T11:58:24Z

sparc64 needs to call a preflow handler on certain interrupts befor calling the action chain. Integrate it into handle_fasteoi_irq. Must be enabled via CONFIG_IRQ_FASTEOI_PREFLOW. No impact when disabled. Signed-off-by: Thomas Gleixner Cc: David S. Miller