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2011-03-18x86: Fix common misspellingsLucas De Marchi
They were generated by 'codespell' and then manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi> Cc: trivial@kernel.org LKML-Reference: <1300389856-1099-3-git-send-email-lucas.demarchi@profusion.mobi> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-01-18Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: Clear irqstack thread_info x86: Make relocatable kernel work with new binutils
2011-01-18x86: Clear irqstack thread_infoBrian Gerst
Mathias Merz reported that v2.6.37 failed to boot on his system. Make sure that the thread_info part of the irqstack is initialized to zeroes. Reported-and-Tested-by: Matthias Merz <linux@merz-ka.de> Signed-off-by: Brian Gerst <brgerst@gmail.com> Acked-by: Pekka Enberg <penberg@kernel.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <AANLkTimyKXfJ1x8tgwrr1hYnNLrPfgE1NTe4z7L6tUDm@mail.gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-12-30x86: Use this_cpu_ops to optimize codeTejun Heo
Go through x86 code and replace __get_cpu_var and get_cpu_var instances that refer to a scalar and are not used for address determinations. Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Acked-by: Tejun Heo <tj@kernel.org> Acked-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2010-10-29x86-32: Restore irq stacks NUMA-aware allocationsEric Dumazet
Commit 22d4cd4c4d ("Allocate irq stacks seperate from percpu area") removed NUMA affinity of IRQ stacks as side-effect of the fix. Using alloc_pages_node() instead of __get_free_pages() is safe, even if the target node has no available LOWMEM pages : alloc_pages_node() fallbacks to another node. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Brian Gerst <brgerst@gmail.com> Cc: tj@kernel.org Cc: torvalds@linux-foundation.org Cc: Peter Zijlstra <peterz@infradead.org> LKML-Reference: <1288276854.2649.607.camel@edumazet-laptop> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-27x86-32: Allocate irq stacks seperate from percpu areaBrian Gerst
The percpu allocator cannot handle alignments larger than one page. Allocate the irq stacks seperately, and only keep the pointers as percpu data. Signed-off-by: Brian Gerst <brgerst@gmail.com> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: tj@kernel.org LKML-Reference: <1288158182-1753-1-git-send-email-brgerst@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-09-07x86, 32-bit: Align percpu area and irq stacks to THREAD_SIZEAlexander van Heukelum
The irq stacks, located in the percpu-area, need to be THREAD_SIZE aligned. Add the infrastucture to align percpu variables to larger-than-pagesize amounts within the percpu area, and use it to specify the alignment for the irq stacks. Also align the percpu area itself to THREAD_SIZE. This should make irq stacks work with 8K THREAD_SIZE. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Cc: Tejun Heo <tj@kernel.org> Cc: hch@lst.de LKML-Reference: <1283799222.15941.1393621887@webmail.messagingengine.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-07-27x86-32: Align IRQ stacks properlyChristoph Hellwig
As suggested by Steven Rostedt we need to align the IRQ stacks to the stack size, not just the page size to make them work for stack traces and other things that depend on finding the stack slot itself with 8k stacks. Signed-off-by: Christoph Hellwig <hch@lst.de> LKML-Reference: <20100727121313.GA19976@lst.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2010-06-29x86: Always use irq stacksChristoph Hellwig
IRQ stacks provide much better safety against unexpected stack use from interrupts, at the minimal downside of slightly higher memory usage. Enable irq stacks also for the default 8k stack on 32-bit kernels to minimize the problem of stack overflows through interrupt activity. This is what the 64-bit kernel and various other architectures already do. Signed-off-by: Christoph Hellwig <hch@lst.de> LKML-Reference: <20100628121554.GA6605@lst.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2009-11-02x86: Unify fixup_irqs() for 32-bit and 64-bit kernelsSuresh Siddha
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>
2009-08-09x86: Use printk_once()Marcin Slusarz
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com> Cc: "H. Peter Anvin" <hpa@zytor.com> LKML-Reference: <1249847649-11631-6-git-send-email-marcin.slusarz@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-24Merge branch 'tj-percpu' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc into core/percpu Conflicts: arch/x86/include/asm/pgtable.h
2009-02-20x86: use percpu data for 4k hardirq and softirq stacksLai Jiangshan
Impact: economize memory for large NR_CPUS percpu data is setup earlier than irq, we can use percpu data to economize memory. Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Tejun Heo <tj@kernel.org>
2009-02-17x86, apic: remove duplicate asm/apic.h inclusionsIngo Molnar
Impact: cleanup Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-17x86, apic: remove genapic.hIngo Molnar
Impact: cleanup Remove genapic.h and remove all references to it. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-09x86: unify do_IRQ()Jeremy Fitzhardinge
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>
2009-02-09x86: add handle_irq() to allow interrupt injectionJeremy Fitzhardinge
Xen uses a different interrupt path, so introduce handle_irq() to allow interrupts to be inserted into the normal interrupt path. This is handled slightly differently on 32 and 64-bit. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-29x86: remove mach_apic.hIngo Molnar
Spread mach_apic.h definitions into genapic.h. (with some knock-on effects on smp.h and apic.h.) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-11cpumask: update irq_desc to use cpumask_var_tMike Travis
Impact: reduce memory usage, use new cpumask API. Replace the affinity and pending_masks with cpumask_var_t's. This adds to the significant size reduction done with the SPARSE_IRQS changes. The added functions (init_alloc_desc_masks & init_copy_desc_masks) are in the include file so they can be inlined (and optimized out for the !CONFIG_CPUMASKS_OFFSTACK case.) [Naming chosen to be consistent with the other init*irq functions, as well as the backwards arg declaration of "from, to" instead of the more common "to, from" standard.] Includes a slight change to the declaration of struct irq_desc to embed the pending_mask within ifdef(CONFIG_SMP) to be consistent with other references, and some small changes to Xen. Tested: sparse/non-sparse/cpumask_offstack/non-cpumask_offstack/nonuma/nosmp on x86_64 Signed-off-by: Mike Travis <travis@sgi.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Cc: virtualization@lists.osdl.org Cc: xen-devel@lists.xensource.com Cc: Yinghai Lu <yhlu.kernel@gmail.com>
2009-01-04x86: irq_32.c fix style problemsJaswinder Singh Rajput
Impact: cleanup Fix: WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h> ERROR: "(foo*)" should be "(foo *)" ERROR: space required after that ',' (ctx:VxV) total: 5 errors, 1 warnings Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-16x86: fixup_irqs() doesnt need an argument.Mike Travis
Impact: cleanup, remove on-stack cpumask. The "map" arg is always cpu_online_mask. Importantly, set_affinity always ands the argument with cpu_online_mask anyway, so we don't need to do it in fixup_irqs(), avoiding a temporary. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com>
2008-12-13Merge ../linux-2.6-x86Rusty Russell
Conflicts: arch/x86/kernel/io_apic.c kernel/sched.c kernel/sched_stats.h
2008-12-13cpumask: make irq_set_affinity() take a const struct cpumaskRusty Russell
Impact: change existing irq_chip API Not much point with gentle transition here: the struct irq_chip's setaffinity method signature needs to change. Fortunately, not widely used code, but hits a few architectures. Note: In irq_select_affinity() I save a temporary in by mangling irq_desc[irq].affinity directly. Ingo, does this break anything? (Folded in fix from KOSAKI Motohiro) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Grant Grundler <grundler@parisc-linux.org> Acked-by: Ingo Molnar <mingo@redhat.com> Cc: ralf@linux-mips.org Cc: grundler@parisc-linux.org Cc: jeremy@xensource.com Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
2008-12-08sparse irq_desc[] array: core kernel and x86 changesYinghai Lu
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>
2008-10-16x86: move ack_bad_irq() to irq.cThomas Gleixner
Share more duplicated code. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-10-16x86: unify show_interrupts() and proc helpersThomas Gleixner
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>
2008-10-16x86: cleanup show_interruptsThomas Gleixner
The sparseirq patches introduced some more ugliness in show_interrupts(). Clean it up all together and make the code easier to read by splitting out the "tail" function which prints the special interrupts. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-10-16genirq: remove sparse irq codeThomas Gleixner
This code is not ready, but we need to rip it out instead of rebasing as we would lose the APIC/IO_APIC unification otherwise. Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-10-16x86: irq no should not use hex in /proc/interruptsYinghai Lu
Arjan van de Ven noticed that we changed IRQ numbers from decimal to hex in /proc/interrupts - that can break user-space utilities like irqbalanced. Reported-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16x86: make HAVE_SPARSE_IRQ support selectableYinghai Lu
Ingo said sparse_irq is some intrusive. need to make it selectable to make it simple, remove irq_desc as parameter in some functions. (ack, eoi, set_affinity). may need to make member if irq_chip to take irq_desc, or struct irq later. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16x86: add debug info for 32bit sparse_irqYinghai Lu
so could figure out bugs where we get an interrupt, but vector_irq is not initialized yet. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16x86: make 32bit support per_cpu vectorYinghai Lu
so we can merge io_apic_32.c and io_apic_64.c v2: Use cpu_online_map as target cpus for bigsmp, just like 64-bit is doing. Also remove some unused TARGET_CPUS macro. v3: need to check if desc is null in smp_irq_move_cleanup also migration needs to reset vector too, so copy __target_IO_APIC_irq from 64bit. (the duplication will go away once the two files are unified.) Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16x86: make 32 bit to use sparse_irqYinghai Lu
but actually irq still needs to be less than NR_IRQS, because interrupt[NR_IRQS] in entry.S. need to enable per_cpu vector... Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16x86: move kstat_irqs from kstat to irq_descYinghai Lu
based on Eric's patch ... together mold it with dyn_array for irq_desc, will allcate kstat_irqs for nr_irq_desc alltogether if needed. -- at that point nr_cpus is known already. v2: make sure system without generic_hardirqs works they don't have irq_desc v3: fix merging v4: [mingo@elte.hu] fix typo [ mingo@elte.hu ] irq: build fix fix: arch/x86/xen/spinlock.c: In function 'xen_spin_lock_slow': arch/x86/xen/spinlock.c:90: error: 'struct kernel_stat' has no member named 'irqs' Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16generic: sparse irqs: use irq_desc() together with dyn_array, instead of ↵Yinghai Lu
irq_desc[] add CONFIG_HAVE_SPARSE_IRQ to for use condensed array. Get rid of irq_desc[] array assumptions. Preallocate 32 irq_desc, and irq_desc() will try to get more. ( No change in functionality is expected anywhere, except the odd build failure where we missed a code site or where a crossing commit itroduces new irq_desc[] usage. ) v2: according to Eric, change get_irq_desc() to irq_desc() Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-16x86: use nr_irqsYinghai Lu
also add first_free_entry and pin_map_size, which were NR_IRQS derived constants. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-04x86: capitalize function call interrupts consistentlyAndi Kleen
Impact: aestetic Capitalize function call interrupts consistently. All other descriptions in /proc/interrupts are capitalized except for "function call interrupts". Capitalize it too for consistency. While that's technically a published ABI I think the risk of anyone relying on that text to stay the same is negligible. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-07-16x86: use __page_aligned_data/bssJeremy Fitzhardinge
Update arch/x86's use of page-aligned variables. The change to arch/x86/xen/mmu.c fixes an actual bug, but the rest are cleanups and to set a precedent. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08Merge branch 'x86/irq' into x86/develIngo Molnar
Conflicts: arch/x86/kernel/i8259.c arch/x86/kernel/irqinit_64.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-25x86: make /proc/stat account for all interruptsJan Beulich
LAPIC interrupts, which don't go through the generic interrupt handling code, aren't accounted for in /proc/stat. Hence this patch adds a mechanism architectures can use to accordingly adjust the statistics. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-05-12x86: irq_32 move 4kstacks code to one placeThomas Gleixner
Move the 4KSTACKS related code to one place. This allows to un#ifdef do_IRQ() and share the executed on stack for the stack overflow printk and the softirq call. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-12x86: janitor stack overflow warning patchThomas Gleixner
Add KERN_WARNING to the printk as this could not be done in the original patch, which allegedly only moves code around. Un#ifdef do_IRQ. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-12i386: Execute stack overflow warning on interrupt stack v2Andi Kleen
Previously the reporting printk would run on the process stack, which risks overflow an already low stack. Instead execute it on the interrupt stack. This makes it more likely for the printk to make it actually out. It adds one not taken test/branch more to the interrupt path when stack overflow checking is enabled. We could avoid that by duplicating more code, but that seemed not worth it. Based on an observation by Eric Sandeen. v2: Fix warnings in some configs Signed-off-by: Andi Kleen <andi@firstfloor.org> Cc: mingo@elte.hu Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-29proper __do_softirq() prototypeAdrian Bunk
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>
2008-04-26i386: fix asm constraint in do_IRQ()Jan Beulich
Two prior changes resulted in the "ecx" clobber being lost. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-17x86: replace remaining __FUNCTION__ occurancesHarvey Harrison
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-01-30x86: remove all definitions with fastcallHarvey Harrison
fastcall is always defined to be empty, remove it from arch/x86 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30x86: rename the struct pt_regs members for 32/64-bit consistencyH. Peter Anvin
We have a lot of code which differs only by the naming of specific members of structures that contain registers. In order to enable additional unifications, this patch drops the e- or r- size prefix from the register names in struct pt_regs, and drops the x- prefixes for segment registers on the 32-bit side. This patch also performs the equivalent renames in some additional places that might be candidates for unification in the future. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-17x86: also show non-zero IRQ counts for vectors that currently don't have a ↵Jan Beulich
handler It doesn't seem to make sense to hide these, even if their counts can't change at the point in time they're being displayed. [ tglx: arch/x86 adaptation ] Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2007-10-17x86: expand /proc/interrupts to include missing vectors, v2Joe Korty
Add missing IRQs and IRQ descriptions to /proc/interrupts. /proc/interrupts is most useful when it displays every IRQ vector in use by the system, not just those somebody thought would be interesting. This patch inserts the following vector displays to the i386 and x86_64 platforms, as appropriate: rescheduling interrupts TLB flush interrupts function call interrupts thermal event interrupts threshold interrupts spurious interrupts A threshold interrupt occurs when ECC memory correction is occuring at too high a frequency. Thresholds are used by the ECC hardware as occasional ECC failures are part of normal operation, but long sequences of ECC failures usually indicate a memory chip that is about to fail. Thermal event interrupts occur when a temperature threshold has been exceeded for some CPU chip. IIRC, a thermal interrupt is also generated when the temperature drops back to a normal level. A spurious interrupt is an interrupt that was raised then lowered by the device before it could be fully processed by the APIC. Hence the apic sees the interrupt but does not know what device it came from. For this case the APIC hardware will assume a vector of 0xff. Rescheduling, call, and TLB flush interrupts are sent from one CPU to another per the needs of the OS. Typically, their statistics would be used to discover if an interrupt flood of the given type has been occuring. AK: merged v2 and v4 which had some more tweaks AK: replace Local interrupts with Local timer interrupts AK: Fixed description of interrupt types. [ tglx: arch/x86 adaptation ] [ mingo: small cleanup ] Signed-off-by: Joe Korty <joe.korty@ccur.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Tim Hockin <thockin@hockin.org> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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