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* Merge branch 'x86-uv-for-linus' of ↵Linus Torvalds2009-12-081-10/+10
|\ | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: UV RTC: Always enable RTC clocksource x86: UV RTC: Rename generic_interrupt to x86_platform_ipi x86: UV RTC: Clean up error handling x86: UV RTC: Add clocksource only boot option x86: UV RTC: Fix early expiry handling
| * x86: UV RTC: Rename generic_interrupt to x86_platform_ipiDimitri Sivanich2009-10-141-10/+10
| | | | | | | | | | | | Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> LKML-Reference: <20091014142257.GE11048@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'x86-apic-for-linus' of ↵Linus Torvalds2009-12-051-0/+90
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (30 commits) x86, apic: Enable lapic nmi watchdog on AMD Family 11h x86: Remove unnecessary mdelay() from cpu_disable_common() x86, ioapic: Document another case when level irq is seen as an edge x86, ioapic: Fix the EOI register detection mechanism x86, io-apic: Move the effort of clearing remoteIRR explicitly before migrating the irq x86: SGI UV: Map low MMR ranges x86: apic: Print out SRAT table APIC id in hex x86: Re-get cfg_new in case reuse/move irq_desc x86: apic: Remove not needed #ifdef x86: io-apic: IO-APIC MMIO should not fail on resource insertion x86: Remove asm/apicnum.h x86: apic: Do not use stacked physid_mask_t x86, apic: Get rid of apicid_to_cpu_present assign on 64-bit x86, ioapic: Use snrpintf while set names for IO-APIC resourses x86, apic: Use PAGE_SIZE instead of numbers x86: Remove local_irq_enable()/local_irq_disable() in fixup_irqs() x86: Use EOI register in io-apic on intel platforms x86: Force irq complete move during cpu offline x86: Remove move_cleanup_count from irq_cfg x86, intr-remap: Avoid irq_chip mask/unmask in fixup_irqs() for intr-remapping ...
| * | x86: Remove local_irq_enable()/local_irq_disable() in fixup_irqs()Suresh Siddha2009-11-021-4/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To ensure that we handle all the pending interrupts (destined for this cpu that is going down) in the interrupt subsystem before the cpu goes offline, fixup_irqs() does: local_irq_enable(); mdelay(1); local_irq_disable(); Enabling interrupts is not a good thing as this cpu is already offline. So this patch replaces that logic with, mdelay(1); check APIC_IRR bits Retrigger the irq at the new destination if any interrupt has arrived via IPI. For IO-APIC level triggered interrupts, this retrigger IPI will appear as an edge interrupt. ack_apic_level() will detect this condition and IO-APIC RTE's remoteIRR is cleared using directed EOI(using IO-APIC EOI register) on Intel platforms and for others it uses the existing mask+edge logic followed by unmask+level. We can also remove mdelay() and then send spuriuous interrupts to new cpu targets for all the irqs that were handled previously by this cpu that is going offline. While it works, I have seen spurious interrupt messages (nothing wrong but still annoying messages during cpu offline, which can be seen during suspend/resume etc) Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Gary Hade <garyhade@us.ibm.com> Cc: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <20091026230002.043281924@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: Force irq complete move during cpu offlineSuresh Siddha2009-11-021-0/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a cpu goes offline, fixup_irqs() try to move irq's currently destined to the offline cpu to a new cpu. But this attempt will fail if the irq is recently moved to this cpu and the irq still hasn't arrived at this cpu (for non intr-remapping platforms this is when we free the vector allocation at the previous destination) that is about to go offline. This will endup with the interrupt subsystem still pointing the irq to the offline cpu, causing that irq to not work any more. Fix this by forcing the irq to complete its move (its been a long time we moved the irq to this cpu which we are offlining now) and then move this irq to a new cpu before this cpu goes offline. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Gary Hade <garyhade@us.ibm.com> Cc: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <20091026230001.848830905@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86, intr-remap: Avoid irq_chip mask/unmask in fixup_irqs() for intr-remappingSuresh Siddha2009-11-021-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the presence of interrupt-remapping, irqs will be migrated in the process context and we don't do (and there is no need to) irq_chip mask/unmask while migrating the interrupt. Similarly fix the fixup_irqs() that get called during cpu offline and avoid calling irq_chip mask/unmask for irqs that are ok to be migrated in the process context. While we didn't observe any race condition with the existing code, this change takes complete advantage of interrupt-remapping in the newer generation platforms and avoids any potential HW lockup's (that often worry Eric :) Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Eric W. Biederman <ebiederm@xmission.com> Cc: garyhade@us.ibm.com LKML-Reference: <20091026230001.661423939@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: Unify fixup_irqs() for 32-bit and 64-bit kernelsSuresh Siddha2009-11-021-0/+59
| |/ | | | | | | | | | | | | | | | | | | | | | | There is no reason to have different fixup_irqs() for 32-bit and 64-bit kernels. Unify by using the superior 64-bit version for both the kernels. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Gary Hade <garyhade@us.ibm.com> Cc: Eric W. Biederman <ebiederm@xmission.com> LKML-Reference: <20091026230001.562512739@sbs-t61.sc.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86: Tighten conditionals on MCE related statisticsJan Beulich2009-11-231-6/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | irq_thermal_count is only being maintained when X86_THERMAL_VECTOR, and both X86_THERMAL_VECTOR and X86_MCE_THRESHOLD don't need extra wrapping in X86_MCE conditionals. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Yong Wang <yong.y.wang@intel.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: Arjan van de Ven <arjan@infradead.org> LKML-Reference: <4B06AFA902000078000211F8@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | Merge branch 'linus' into x86/urgentIngo Molnar2009-10-151-2/+0
|\ \ | | | | | | | | | | | | | | | Merge reason: pull in latest, to be able to revert a patch there. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | Revert "x86, timers: Check for pending timers after (device) interrupts"Ingo Molnar2009-10-091-2/+0
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 9bcbdd9c58617f1301dd4f17c738bb9bc73aca70. The real bug producing LatencyTop latencies has been fixed in: f5dc375: sched: Update the clock of runqueue select_task_rq() selected And the commit being reverted here triggers local timer processing from every device IRQ. If device IRQs come in at a high frequency, this could cause a performance regression. The commit being reverted here purely 'fixed' the reported latency as a side effect, because CPUs were being moved out of idle more often. Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Frans Pop <elendil@planet.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <20091008064041.67219b13@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* / x86, perf_event: Rename 'performance counter interrupt'Li Hong2009-10-141-2/+2
|/ | | | | | | | | | | | | | | | In 'cdd6c482c9ff9c55475ee7392ec8f672eddb7be6', we renamed Performance Counters -> Performance Events. The name showed up in /proc/interrupts also needs a change. I use PMI (Performance monitoring interrupt) here, since it is the official name used in Intel's documents. Signed-off-by: Li Hong <lihong.hi@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <20091014105039.GA22670@uhli> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86, timers: Check for pending timers after (device) interruptsArjan van de Ven2009-10-081-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that range timers and deferred timers are common, I found a problem with these using the "perf timechart" tool. Frans Pop also reported high scheduler latencies via LatencyTop, when using iwlagn. It turns out that on x86, these two 'opportunistic' timers only get checked when another "real" timer happens. These opportunistic timers have the objective to save power by hitchhiking on other wakeups, as to avoid CPU wakeups by themselves as much as possible. The change in this patch runs this check not only at timer interrupts, but at all (device) interrupts. The effect is that: 1) the deferred timers/range timers get delayed less 2) the range timers cause less wakeups by themselves because the percentage of hitchhiking on existing wakeup events goes up. I've verified the working of the patch using "perf timechart", the original exposed bug is gone with this patch. Frans also reported success - the latencies are now down in the expected ~10 msec range. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Tested-by: Frans Pop <elendil@planet.nl> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mike Galbraith <efault@gmx.de> LKML-Reference: <20091008064041.67219b13@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: mce: Rename CONFIG_X86_NEW_MCE to CONFIG_X86_MCEAndi Kleen2009-07-091-2/+2
| | | | | | | | | | Drop the CONFIG_X86_NEW_MCE symbol and change all references to it to check for CONFIG_X86_MCE directly. No code changes Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* Merge branch 'linus' into x86/mce3Ingo Molnar2009-06-111-0/+11
|\ | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/cpu/mcheck/mce_64.c arch/x86/kernel/irq.c Merge reason: Resolve the conflicts above. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * Merge branch 'linus' into perfcounters/coreIngo Molnar2009-06-111-12/+8
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/kernel/irqinit.c arch/x86/kernel/irqinit_64.c arch/x86/kernel/traps.c arch/x86/mm/fault.c include/linux/sched.h kernel/exit.c
| | * Merge branch 'x86-cleanups-for-linus' of ↵Linus Torvalds2009-06-101-0/+1
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, nmi: Use predefined numbers instead of hardcoded one x86: asm/processor.h: remove double declaration x86, mtrr: replace MTRRdefType_MSR with msr-index's MSR_MTRRdefType x86, mtrr: replace MTRRfix4K_C0000_MSR with msr-index's MSR_MTRRfix4K_C0000 x86, mtrr: remove mtrr MSRs double declaration x86, mtrr: replace MTRRfix16K_80000_MSR with msr-index's MSR_MTRRfix16K_80000 x86, mtrr: replace MTRRfix64K_00000_MSR with msr-index's MSR_MTRRfix64K_00000 x86, mtrr: replace MTRRcap_MSR with msr-index's MSR_MTRRcap x86: mce: remove duplicated #include x86: msr-index.h remove duplicate MSR C001_0015 declaration x86: clean up arch/x86/kernel/tsc_sync.c a bit x86: use symbolic name for VM86_SIGNAL when used as vm86 default return x86: added 'ifndef _ASM_X86_IOMAP_H' to iomap.h x86: avoid multiple declaration of kstack_depth_to_print x86: vdso/vma.c declare vdso_enabled and arch_setup_additional_pages before they get used x86: clean up declarations and variables x86: apic/x2apic_cluster.c x86_cpu_to_logical_apicid should be static x86 early quirks: eliminate unused function
| | | * x86: clean up declarations and variablesJaswinder Singh Rajput2009-04-121-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup, no code changed - syscalls.h update declarations due to unifications - irq.c declare smp_generic_interrupt() before it gets used - process.c declare sys_fork() and sys_vfork() before they get used - tsc.c rename tsc_khz shadowed variable - apic/probe_32.c declare apic_default before it gets used - apic/nmi.c prev_nmi_count should be unsigned - apic/io_apic.c declare smp_irq_move_cleanup_interrupt() before it gets used - mm/init.c declare direct_gbpages and free_initrd_mem before they get used Signed-off-by: Jaswinder Singh Rajput <jaswinder@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | Merge branch 'linus' into perfcounters/coreIngo Molnar2009-04-291-1/+1
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf_counter: fix alignment in /proc/interruptsLuis Henriques2009-04-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Trivial fix on columns alignment in /proc/interrupts file. Signed-off-by: Luis Henriques <henrix@sapo.pt> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20090413192449.GA3920@hades.domain.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86: smarten /proc/interrupts output for new countersHidetoshi Seto2009-04-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now /proc/interrupts of tip tree has new counters: CNT: Performance counter interrupts Format change of output, as like that by commit: commit 7a81d9a7da03d2f27840d659f97ef140d032f609 x86: smarten /proc/interrupts output should be applied to these new counters too. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Jan Beulich <jbeulich@novell.com> LKML-Reference: <49C98DEA.8060208@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | perf_counter: x86: self-IPI for pending workPeter Zijlstra2009-04-071-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement set_perf_counter_pending() with a self-IPI so that it will run ASAP in a usable context. For now use a second IRQ vector, because the primary vector pokes the apic in funny ways that seem to confuse things. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> LKML-Reference: <20090406094517.724626696@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | Merge branch 'linus' into perfcounters/core-v2Ingo Molnar2009-04-061-31/+57
| |\ \ \ \ | | | |_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: we have gathered quite a few conflicts, need to merge upstream Conflicts: arch/powerpc/kernel/Makefile arch/x86/ia32/ia32entry.S arch/x86/include/asm/hardirq.h arch/x86/include/asm/unistd_32.h arch/x86/include/asm/unistd_64.h arch/x86/kernel/cpu/common.c arch/x86/kernel/irq.c arch/x86/kernel/syscall_table_32.S arch/x86/mm/iomap_32.c include/linux/sched.h kernel/Makefile Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | Merge branch 'x86/core' into perfcounters/coreIngo Molnar2009-02-131-0/+38
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/Kconfig arch/x86/kernel/apic.c arch/x86/kernel/setup_percpu.c
| * \ \ \ \ Merge branch 'core/percpu' into perfcounters/coreIngo Molnar2009-01-181-5/+1
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/x86/include/asm/pda.h We merge tip/core/percpu into tip/perfcounters/core because of a semantic and contextual conflict: the former eliminates the PDA, while the latter extends it with apic_perf_irqs field. Resolve the conflict by moving the new field to the irq_cpustat structure on 64-bit too. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * \ \ \ \ \ Merge commit 'v2.6.29-rc1' into perfcounters/coreIngo Molnar2009-01-111-1/+7
| |\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: include/linux/kernel_stat.h
| * | | | | | | performance counters: x86 supportIngo Molnar2008-12-081-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implement performance counters for x86 Intel CPUs. It's simplified right now: the PERFMON CPU feature is assumed, which is available in Core2 and later Intel CPUs. The design is flexible to be extended to more CPU types as well. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | | x86, mce: fix for mce countersHidetoshi Seto2009-06-031-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the MCE counters work on 32bit and add poll count in arch_irq_stat_cpu. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | | | | x86, mce: add MCE poll count to /proc/interruptsAndi Kleen2009-06-031-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Keep a count of the machine check polls (or CMCI events) in /proc/interrupts. Andi needs this for debugging, but it's also useful in general to see what's going in by the kernel. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | | | | x86, mce: add machine check exception count in /proc/interruptsAndi Kleen2009-06-031-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Useful for debugging, but it's also good general policy to have a counter for all special interrupts there. This makes it easier to diagnose where a CPU is spending its time. [ Impact: feature, debugging tool ] Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | | | | Merge branch 'irq/numa' into x86/mce3H. Peter Anvin2009-06-011-12/+7
|\ \ \ \ \ \ \ \ | | |_|_|_|_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: arch/x86/kernel/irqinit_{32,64}.c unified in irq/numa and modified in x86/mce3; this merge resolves the conflict. Conflicts: arch/x86/kernel/irqinit.c Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | | | | | Merge branch 'linus' into x86/apicIngo Molnar2009-04-171-1/+1
| |\ \ \ \ \ \ \ | | | |_|_|_|_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: new intr-remap patches depend on the s2ram iommu fixes from upstream Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | | x86: apic - introduce dummy apic operationsCyrill Gorcunov2009-04-121-8/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: refactor, speed up and robustize code In case if apic was disabled by kernel option or by hardware limits we can use dummy operations in apic->write to simplify the ack_APIC_irq() code. At the lame time the patch fixes the missed EOI in do_IRQ function (which has place if kernel is compiled as X86-32 and interrupt without handler happens where apic was not asked to be disabled via kernel option). Note that native_apic_write_dummy() consists of WARN_ON_ONCE to catch any buggy writes on enabled APICs. Could be removed after some time of testing. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> LKML-Reference: <20090412165058.724788431@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | | | x86: irq.c - tiny cleanupCyrill Gorcunov2009-04-121-4/+5
| | |_|_|_|_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup, robustization 1) guard ack_bad_irq with printk_ratelimit since there is no guarantee we will not be flooded one day 2) use pr_emerg() helper Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> LKML-Reference: <20090412165058.277579847@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | | | x86, mce: use 64bit machine check code on 32bitAndi Kleen2009-05-281-2/+2
| |/ / / / / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 64bit machine check code is in many ways much better than the 32bit machine check code: it is more specification compliant, is cleaner, only has a single code base versus one per CPU, has better infrastructure for recovery, has a cleaner way to communicate with user space etc. etc. Use the 64bit code for 32bit too. This is the second attempt to do this. There was one a couple of years ago to unify this code for 32bit and 64bit. Back then this ran into some trouble with K7s and was reverted. I believe this time the K7 problems (and some others) are addressed. I went over the old handlers and was very careful to retain all quirks. But of course this needs a lot of testing on old systems. On newer 64bit capable systems I don't expect much problems because they have been already tested with the 64bit kernel. I made this a CONFIG for now that still allows to select the old machine check code. This is mostly to make testing easier, if someone runs into a problem we can ask them to try with the CONFIG switched. The new code is default y for more coverage. Once there is confidence the 64bit code works well on older hardware too the CONFIG_X86_OLD_MCE and the associated code can be easily removed. This causes a behaviour change for 32bit installations. They now have to install the mcelog package to be able to log corrected machine checks. The 64bit machine check code only handles CPUs which support the standard Intel machine check architecture described in the IA32 SDM. The 32bit code has special support for some older CPUs which have non standard machine check architectures, in particular WinChip C3 and Intel P5. I made those a separate CONFIG option and kept them for now. The WinChip variant could be probably removed without too much pain, it doesn't really do anything interesting. P5 is also disabled by default (like it was before) because many motherboards have it miswired, but according to Alan Cox a few embedded setups use that one. Forward ported/heavily changed version of old patch, original patch included review/fixes from Thomas Gleixner, Bert Wesarg. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* | | | | | x86: smarten /proc/interrupts output for new countersHidetoshi Seto2009-04-081-1/+1
|/ / / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now /proc/interrupts of tip tree has new counters: PLT: Platform interrupts Format change of output, as like that by commit: commit 7a81d9a7da03d2f27840d659f97ef140d032f609 x86: smarten /proc/interrupts output should be applied to these new counters too. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: Jan Beulich <jbeulich@novell.com> LKML-Reference: <49C98DEA.8060208@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | x86: irq.c keep CONFIG_X86_LOCAL_APIC interrupts togetherJaswinder Singh Rajput2009-03-231-9/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup keep CONFIG_X86_LOCAL_APIC interrupts together to avoid extra ifdef Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
* | | | | x86: irq.c use same path for show_interruptsJaswinder Singh Rajput2009-03-231-8/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup SMP and !SMP will use same path for show_interrupts Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
* | | | | x86: smarten /proc/interrupts outputJan Beulich2009-03-131-15/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: change /proc/interrupts output ABI With the number of interrupts on large systems growing, assumptions on the width an interrupt number requires when converted to a decimal string turn invalid. Therefore, calculate the maximum number of digits dynamically. Signed-off-by: Jan Beulich <jbeulich@novell.com> LKML-Reference: <49B911EB.76E4.0078.0@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | x86: UV, SGI RTC: add generic system vectorDimitri Sivanich2009-03-041-0/+34
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch allocates a system interrupt vector for various platform specific uses. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: john stultz <johnstul@us.ibm.com> LKML-Reference: <20090304185605.GA24419@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | x86, apic: remove genapic.hIngo Molnar2009-02-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Remove genapic.h and remove all references to it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | | x86: fold apic_ops into genapicYinghai Lu2009-02-171-1/+1
| |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup make it simpler, don't need have one extra struct. v2: fix the sgi_uv build Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | | x86: unify do_IRQ()Jeremy Fitzhardinge2009-02-091-0/+38
| |_|/ |/| | | | | | | | | | | | | | | | | | | | With the differences in interrupt handling hoisted into handle_irq(), do_IRQ is more or less identical between 32 and 64 bit, so unify it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | x86-64: Move irq stats from PDA to per-cpu and consolidate with 32-bit.Brian Gerst2009-01-191-5/+1
| |/ |/| | | | | | | Signed-off-by: Brian Gerst <brgerst@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
* | x86: irq.c fix style problemsJaswinder Singh Rajput2009-01-041-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Fix: WARNING: Use #include <linux/smp.h> instead of <asm/smp.h> total: 0 errors, 1 warnings Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | x86: export vector_used_by_percpu_irqIngo Molnar2008-12-231-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | Impact: build fix lguest can be built as a module and makes use of this new symbol: ERROR: "vector_used_by_percpu_irq" [drivers/lguest/lg.ko] undefined! export it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | sparse irq_desc[] array: core kernel and x86 changesYinghai Lu2008-12-081-0/+3
|/ | | | | | | | | | | | | | | | | | | | | Impact: new feature Problem on distro kernels: irq_desc[NR_IRQS] takes megabytes of RAM with NR_CPUS set to large values. The goal is to be able to scale up to much larger NR_IRQS value without impacting the (important) common case. To solve this, we generalize irq_desc[NR_IRQS] to an (optional) array of irq_desc pointers. When CONFIG_SPARSE_IRQ=y is used, we use kzalloc_node to get irq_desc, this also makes the IRQ descriptors NUMA-local (to the site that calls request_irq()). This gets rid of the irq_cfg[] static array on x86 as well: irq_cfg now uses desc->chip_data for x86 to store irq_cfg. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* genirq: fix off by one and coding styleIngo Molnar2008-10-211-2/+2
| | | | | | | | | | Fix off-by-one in for_each_irq_desc_reverse(). Impact is near zero in practice, because nothing substantial wants to iterate down to IRQ#0 - but fix it nevertheless. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: move ack_bad_irq() to irq.cThomas Gleixner2008-10-161-0/+23
| | | | | | Share more duplicated code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: unify show_interrupts() and proc helpersThomas Gleixner2008-10-161-0/+166
show_interrupts() and proc helpers are basically the same for 32 and 64 bit. Move them to a shared source file. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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