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* s390/irq: use designated initializers for irq class arrayHeiko Carstens2012-09-26
| | | | | | | | | Use designated initializers for the irq class array in irq.c so it's always guaranteed that the order of elements is equal to their corresponding parts in irq.h. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390: add support for runtime instrumentationJan Glauber2012-09-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow user-space threads to use runtime instrumentation (RI). To enable RI for a thread there is a new s390 specific system call, sys_s390_runtime_instr, that takes as parameter a realtime signal number. If the RI facility is available the system call sets up a control block for the calling thread with the appropriate permissions for the thread to modify the control block. The user-space thread can then use the store and modify RI instructions to alter the control block and start/stop the instrumentation via RION/RIOFF. If the user specified program buffer runs full RI triggers an external interrupt. The external interrupt is translated to a real-time signal that is delivered to the thread that enabled RI on that CPU. The number of the real-time signal is the number specified in the RI system call. So, user-space can select any available real-time signal number in case the application itself uses real-time signals for other purposes. The kernel saves the RI control blocks on task switch only if the running thread was enabled for RI. Therefore, the performance impact on task switch should be negligible if RI is not used. RI is only enabled for user-space mode and is disabled for the supervisor state. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/eadm_sch: add support for irq statisticsSebastian Ott2012-09-26
| | | | | | | Add support for EADM interrupt statistics in /proc/interrupts. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* s390/comments: unify copyright messages and remove file namesHeiko Carstens2012-07-20
| | | | | | | | | | | | | | Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* s390/irq: split irq stats for cpu-measurement alert facilitiesHendrik Brueckner2012-05-23
| | | | | | | | | CPU-measurement alerts are generated for different CPU-measurement facilities, for example, the sampling and counter facilities. Split the irq stats according to available facilities. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: simple coding style changeHeiko Carstens2012-04-11
| | | | | | | | | Use braces for if/else/list_for_each_entry bodies if the body consists of more than a single line. Otherwise I get confused and check if there is something broken whenever I see these code snippets. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] oprofile: Allow multiple users of the measurement alert interruptJan Glauber2012-03-23
| | | | | | | | | | | | Prepare the measurement facility which is currently only used by oprofile for multiple users. To achieve that the measurement alert interrupt control bit needs to be protected. The measurement alert definitions are moved to a header file and an interrupt mask is added so that users can discard interrupts if they are for a different measurement subsystem. Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'for-linus' of ↵Linus Torvalds2012-03-22
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 patches from Martin Schwidefsky: "The biggest patch is the rework of the smp code, something I wanted to do for some time. There are some patches for our various dump methods and one new thing: z/VM LGR detection. LGR stands for linux-guest- relocation and is the guest migration feature of z/VM. For debugging purposes we keep a log of the systems where a specific guest has lived." Fix up trivial conflict in arch/s390/kernel/smp.c due to the scheduler cleanup having removed some code next to removed s390 code. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: [S390] kernel: Pass correct stack for smp_call_ipl_cpu() [S390] Ensure that vmcore_info pointer is never accessed directly [S390] dasd: prevent validate server for offline devices [S390] Remove monolithic build option for zcrypt driver. [S390] stack dump: fix indentation in output [S390] kernel: Add OS info memory interface [S390] Use block_sigmask() [S390] kernel: Add z/VM LGR detection [S390] irq: external interrupt code passing [S390] irq: set __ARCH_IRQ_EXIT_IRQS_DISABLED [S390] zfcpdump: Implement async sdias event processing [S390] Use copy_to_absolute_zero() instead of "stura/sturg" [S390] rework idle code [S390] rework smp code [S390] rename lowcore field [S390] Fix gcc 4.6.0 compile warning
| * [S390] irq: external interrupt code passingHeiko Carstens2012-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The external interrupt handlers have a parameter called ext_int_code. Besides the name this paramter does not only contain the ext_int_code but in addition also the "cpu address" (POP) which caused the external interrupt. To make the code a bit more obvious pass a struct instead so the called function can easily distinguish between external interrupt code and cpu address. The cpu address field however is named "subcode" since some external interrupt sources do not pass a cpu address but a different parameter (or none at all). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * [S390] rework idle codeMartin Schwidefsky2012-03-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Whenever the cpu loads an enabled wait PSW it will appear as idle to the underlying host system. The code in default_idle calls vtime_stop_cpu which does the necessary voodoo to get the cpu time accounting right. The udelay code just loads an enabled wait PSW. To correct this rework the vtime_stop_cpu/vtime_start_cpu logic and move the difficult parts to entry[64].S, vtime_stop_cpu can now be called from anywhere and vtime_start_cpu is gone. The correction of the cpu time during wakeup from an enabled wait PSW is done with a critical section in entry[64].S. As vtime_start_cpu is gone, s390_idle_check can be removed as well. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | s390: Convert call_rcu() to kfree_rcu(), drop ext_int_hash_update()Paul E. McKenney2012-02-21
|/ | | | | | | | | | | | The call_rcu() in unregister_external_interrupt() invokes ext_int_hash_update(), which just does a kfree(). Convert the call_rcu() to kfree_rcu(), allowing ext_int_hash_update() to be eliminated. Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] irqstats: split IPI interrupt accountingHeiko Carstens2011-10-30
| | | | | | | | | We use both the external call and emergency call IPIs to signal remote cpus. Therefore it makes sense to account them differently withing /proc/irqstats so we actually know what happened. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] chsc_sch: add support for irq statisticsSebastian Ott2011-10-30
| | | | | | | Add support for CHSC I/O interrupt statistics in /proc/interrupts. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] fix mismatch in summation of I/O IRQ statisticsPeter Oberparleiter2011-10-30
| | | | | | | | | | | | | | | | | | | | | | | | | | Current IRQ statistics support does not show detail counts for I/O interrupts which are processed internally only. The result is a summation count which is way off such as this one: CPU0 CPU1 CPU2 I/O: 1331 710 442 [...] QAI: 15 16 16 [I/O] QDIO Adapter Interrupt QDI: 1 0 0 [I/O] QDIO Interrupt DAS: 706 645 381 [I/O] DASD C15: 26 10 0 [I/O] 3215 C70: 0 0 0 [I/O] 3270 TAP: 0 0 0 [I/O] Tape VMR: 0 0 0 [I/O] Unit Record Devices LCS: 0 0 0 [I/O] LCS CLW: 0 0 0 [I/O] CLAW CTC: 0 0 0 [I/O] CTC APB: 0 0 0 [I/O] AP Bus Fix this by moving I/O interrupt accounting into the common I/O layer. Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] race safe external interrupt registrationJan Glauber2011-07-24
| | | | | | | | | | | | | | | | | The (un-)register_external_interrupt functions are not race safe if more than one interrupt handler is added or deleted for an external interrupt concurrently. Make the registration / unregistration of external interrupts race safe by using RCU and a spinlock. RCU is used to avoid a performance penalty in the external interrupt handler, the register and unregister functions are protected by the spinlock and are not performance critical. call_rcu must be used since the SCLP driver uses the interface with IRQs disabled. Also use the generic list implementation rather than homebrewn list code. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: merge irq.c and s390_ext.cHeiko Carstens2011-05-26
| | | | | | | | Merge irq.c and s390_ext.c into irq.c. That way all external interrupt related functions are together. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] oprofile: add missing irq stats counterHeiko Carstens2011-05-23
| | | | | | Count CPU measurement external interrupts as well. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* [S390] ap bus: add support for irq statisticsHolger Dengler2011-01-05
| | | | | | | | Add support for AP Bus I/O interrupt statistics in /proc/interrupts. Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com> Signed-off-by: Felix Beck <felix.beck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] ctc: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for CTC I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] claw: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for CLAW I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] lcs: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for LCS I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmur: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for VMUR I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] tape: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for ccw based tape I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] 3270: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for 3270 I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] 3215: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for 3215 I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] dasd: add support for irq statisticsHeiko Carstens2011-01-05
| | | | | | | Add support for DASD I/O interrupt statistics in /proc/interrupts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] qdio: add qdio interrupts to interrupt statisticsJan Glauber2011-01-05
| | | | | | | | Count traditional qdio interrupts and adapter interrupts for qdio in the interrupt statistics. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] irq: have detailed statistics for interrupt typesHeiko Carstens2011-01-05
| | | | | | | | | | | | | | | | | | | | | | Up to now /proc/interrupts only has statistics for external and i/o interrupts but doesn't split up them any further. This patch adds a line for every single interrupt source so that it is possible to easier tell what the machine is/was doing. Part of the output now looks like this; CPU0 CPU2 CPU4 EXT: 3898 4232 2305 I/O: 782 315 245 CLK: 1029 1964 727 [EXT] Clock Comparator IPI: 2868 2267 1577 [EXT] Signal Processor TMR: 0 0 0 [EXT] CPU Timer TAL: 0 0 0 [EXT] Timing Alert PFL: 0 0 0 [EXT] Pseudo Page Fault [...] NMI: 0 1 1 [NMI] Machine Checks Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] Fix init irq proc build break.Sachin Sant2009-02-11
| | | | | | Embed init_irq_proc(s390) within CONFIG_PROC_FS to fix a build break. Signed-off-by : Sachin Sant <sachinp@in.ibm.com>
* [S390] show_interrupts: prevent cpu hotplug when walking cpu_online_map.Heiko Carstens2008-05-15
| | | | | | | | Surround all the code withing show_interrupts() with get/put_online_cpus() to prevent strange results wrt cpu hotplug. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* proper __do_softirq() prototypeAdrian Bunk2008-04-29
| | | | | | | | | Add a proper prototype for __do_softirq() in include/linux/interrupt.h Signed-off-by: Adrian Bunk <bunk@kernel.org> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [SOFTIRQ]: Remove do_softirq() symbol export.Robert Olsson2007-10-10
| | | | | | | | | | As noted by Christoph Hellwig, pktgen was the only user so it can now be removed. [ Add missing cases caught by Adrian Bunk. -DaveM ] Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
* [S390] Move init_irq_proc to the other irq related functions.Heiko Carstens2007-02-05
| | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [PATCH] lockdep: irqtrace subsystem, move account_system_vtime() calls into ↵Paul Mackerras2006-07-03
| | | | | | | | | | | | | | | | | | | | | | kernel/softirq.c At the moment, powerpc and s390 have their own versions of do_softirq which include local_bh_disable() and __local_bh_enable() calls. They end up calling __do_softirq (in kernel/softirq.c) which also does local_bh_disable/enable. Apparently the two levels of disable/enable trigger a warning from some validation code that Ingo is working on, and he would like to see the outer level removed. But to do that, we have to move the account_system_vtime calls that are currently in the arch do_softirq() implementations for powerpc and s390 into the generic __do_softirq() (this is a no-op for other archs because account_system_vtime is defined to be an empty inline function on all other archs). This patch does that. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] lockdep: irqtrace subsystem, s390 supportHeiko Carstens2006-07-03
| | | | | | | | | | | irqtrace support for s390. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-16
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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