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* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend()Ingo Molnar2006-06-291-0/+9
| | | | | | | | | | | | Add ->retrigger() irq op to consolidate hw_irq_resend() implementations. (Most architectures had it defined to NOP anyway.) NOTE: ia64 needs testing. i386 and x86_64 tested. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: cleanup: merge pending_irq_cpumask[] into irq_desc[]Ingo Molnar2006-06-291-1/+1
| | | | | | | | | | Consolidation: remove the pending_irq_cpumask[NR_IRQS] array and move it into the irq_desc[NR_IRQS].pending_mask field. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] genirq: rename desc->handler to desc->chipIngo Molnar2006-06-291-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch-queue improves the generic IRQ layer to be truly generic, by adding various abstractions and features to it, without impacting existing functionality. While the queue can be best described as "fix and improve everything in the generic IRQ layer that we could think of", and thus it consists of many smaller features and lots of cleanups, the one feature that stands out most is the new 'irq chip' abstraction. The irq-chip abstraction is about describing and coding and IRQ controller driver by mapping its raw hardware capabilities [and quirks, if needed] in a straightforward way, without having to think about "IRQ flow" (level/edge/etc.) type of details. This stands in contrast with the current 'irq-type' model of genirq architectures, which 'mixes' raw hardware capabilities with 'flow' details. The patchset supports both types of irq controller designs at once, and converts i386 and x86_64 to the new irq-chip design. As a bonus side-effect of the irq-chip approach, chained interrupt controllers (master/slave PIC constructs, etc.) are now supported by design as well. The end result of this patchset intends to be simpler architecture-level code and more consolidation between architectures. We reused many bits of code and many concepts from Russell King's ARM IRQ layer, the merging of which was one of the motivations for this patchset. This patch: rename desc->handler to desc->chip. Originally i did not want to do this, because it's a big patch. But having both "desc->handler", "desc->handle_irq" and "action->handler" caused a large degree of confusion and made the code appear alot less clean than it truly is. I have also attempted a dual approach as well by introducing a desc->chip alias - but that just wasnt robust enough and broke frequently. So lets get over with this quickly. The conversion was done automatically via scripts and converts all the code in the kernel. This renaming patch is the first one amongst the patches, so that the remaining patches can stay flexible and can be merged and split up without having some big monolithic patch act as a merge barrier. [akpm@osdl.org: build fix] [akpm@osdl.org: another build fix] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: fix vector_lock deadlock in io_apic.cIngo Molnar2006-06-261-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix a potential deadlock scenario introduced by io_apic.c's new vector_lock on i386 and x86_64. Found by the locking correctness validator. The patch was boot-tested on x86. For details of the deadlock scenario, see the validator output: ====================================================== [ BUG: hard-safe -> hard-unsafe lock order detected! ] ------------------------------------------------------ idle/1 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire: (msi_lock){....}, at: [<c04ff8d2>] startup_msi_irq_wo_maskbit+0x10/0x35 and this task is already holding: (&irq_desc[i].lock){++..}, at: [<c015b924>] probe_irq_on+0x36/0x107 which would create a new lock dependency: (&irq_desc[i].lock){++..} -> (msi_lock){....} but this new dependency connects a hard-irq-safe lock: (&irq_desc[i].lock){++..} ... which became hard-irq-safe at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c015aff5>] __do_IRQ+0x3d/0x113 [<c01062d3>] do_IRQ+0x8c/0xad to a hard-irq-unsafe lock: (vector_lock){--..} ... which became hard-irq-unsafe at: ... [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c011b5e8>] assign_irq_vector+0x34/0xc8 [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa [<c010033f>] init+0x32/0x2cb [<c0102005>] kernel_thread_helper+0x5/0xb which could potentially lead to deadlocks! other info that might help us debug this: 3 locks held by idle/1: #0: (port_mutex){--..}, at: [<c067070d>] uart_add_one_port+0x61/0x289 #1: (&state->mutex){--..}, at: [<c067071f>] uart_add_one_port+0x73/0x289 #2: (&irq_desc[i].lock){++..}, at: [<c015b924>] probe_irq_on+0x36/0x107 the hard-irq-safe lock's dependencies: -> (&irq_desc[i].lock){++..} ops: 9861 { initial-use at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c015b415>] setup_irq+0x9b/0x14d [<c1aaa4c4>] time_init_hook+0xf/0x11 [<c1a9f320>] time_init+0x44/0x46 [<c1a9955f>] start_kernel+0x191/0x38f [<c0100210>] 0xc0100210 in-hardirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c015aff5>] __do_IRQ+0x3d/0x113 [<c01062d3>] do_IRQ+0x8c/0xad in-softirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c015aff5>] __do_IRQ+0x3d/0x113 [<c01062d3>] do_IRQ+0x8c/0xad } ... key at: [<c1ea31e0>] irq_desc_lock_type+0x0/0x20 -> (i8259A_lock){++..} ops: 5149 { initial-use at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0108090>] init_8259A+0x11/0x8f [<c1aa0d22>] init_ISA_irqs+0x12/0x4d [<c1aaa4f0>] pre_intr_init_hook+0x8/0xa [<c1aa0cb9>] init_IRQ+0xe/0x65 [<c1a99546>] start_kernel+0x178/0x38f [<c0100210>] 0xc0100210 in-hardirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc [<c015b007>] __do_IRQ+0x4f/0x113 [<c01062d3>] do_IRQ+0x8c/0xad in-softirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc [<c015b007>] __do_IRQ+0x4f/0x113 [<c01062d3>] do_IRQ+0x8c/0xad } ... key at: [<c142f174>] i8259A_lock+0x14/0x40 ... acquired at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0107eb2>] enable_8259A_irq+0x10/0x47 [<c0107f12>] startup_8259A_irq+0x8/0xc [<c015b45e>] setup_irq+0xe4/0x14d [<c1aaa4c4>] time_init_hook+0xf/0x11 [<c1a9f320>] time_init+0x44/0x46 [<c1a9955f>] start_kernel+0x191/0x38f [<c0100210>] 0xc0100210 -> (ioapic_lock){+...} ops: 122 { initial-use at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c1aa71db>] io_apic_get_version+0x16/0x55 [<c1aa5c73>] mp_register_ioapic+0xc6/0x127 [<c1aa382e>] acpi_parse_ioapic+0x2d/0x39 [<c1abe031>] acpi_table_parse_madt_family+0xb4/0x100 [<c1abe093>] acpi_table_parse_madt+0x16/0x18 [<c1aa3c8a>] acpi_boot_init+0x132/0x251 [<c1aa08ea>] setup_arch+0xd36/0xe37 [<c1a99434>] start_kernel+0x66/0x38f [<c0100210>] 0xc0100210 in-hardirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c011bce1>] mask_IO_APIC_irq+0x11/0x31 [<c011c5cc>] ack_edge_ioapic_vector+0x31/0x41 [<c015b007>] __do_IRQ+0x4f/0x113 [<c01062d3>] do_IRQ+0x8c/0xad } ... key at: [<c1432514>] ioapic_lock+0x14/0x3c -> (i8259A_lock){++..} ops: 5149 { initial-use at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0108090>] init_8259A+0x11/0x8f [<c1aa0d22>] init_ISA_irqs+0x12/0x4d [<c1aaa4f0>] pre_intr_init_hook+0x8/0xa [<c1aa0cb9>] init_IRQ+0xe/0x65 [<c1a99546>] start_kernel+0x178/0x38f [<c0100210>] 0xc0100210 in-hardirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc [<c015b007>] __do_IRQ+0x4f/0x113 [<c01062d3>] do_IRQ+0x8c/0xad in-softirq-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0107fb0>] mask_and_ack_8259A+0x1b/0xcc [<c015b007>] __do_IRQ+0x4f/0x113 [<c01062d3>] do_IRQ+0x8c/0xad } ... key at: [<c142f174>] i8259A_lock+0x14/0x40 ... acquired at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c0107e6b>] disable_8259A_irq+0x10/0x47 [<c011bdbd>] startup_edge_ioapic_vector+0x31/0x58 [<c015b45e>] setup_irq+0xe4/0x14d [<c015b5a1>] request_irq+0xda/0xf9 [<c1ac983a>] rtc_init+0x6a/0x1a7 [<c0100457>] init+0x14a/0x2cb [<c0102005>] kernel_thread_helper+0x5/0xb ... acquired at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c011bce1>] mask_IO_APIC_irq+0x11/0x31 [<c011c5cc>] ack_edge_ioapic_vector+0x31/0x41 [<c015b007>] __do_IRQ+0x4f/0x113 [<c01062d3>] do_IRQ+0x8c/0xad the hard-irq-unsafe lock's dependencies: -> (vector_lock){--..} ops: 31 { initial-use at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c011b5e8>] assign_irq_vector+0x34/0xc8 [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa [<c010033f>] init+0x32/0x2cb [<c0102005>] kernel_thread_helper+0x5/0xb softirq-on-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c011b5e8>] assign_irq_vector+0x34/0xc8 [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa [<c010033f>] init+0x32/0x2cb [<c0102005>] kernel_thread_helper+0x5/0xb hardirq-on-W at: [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10485e9>] _spin_lock+0x21/0x2f [<c011b5e8>] assign_irq_vector+0x34/0xc8 [<c1aa82fa>] setup_IO_APIC+0x45a/0xcff [<c1aa56e3>] smp_prepare_cpus+0x5ea/0x8aa [<c010033f>] init+0x32/0x2cb [<c0102005>] kernel_thread_helper+0x5/0xb } ... key at: [<c1432574>] vector_lock+0x14/0x3c stack backtrace: [<c0104f36>] show_trace+0xd/0xf [<c010543e>] dump_stack+0x17/0x19 [<c0144e34>] check_usage+0x1f6/0x203 [<c0146395>] __lockdep_acquire+0x8c2/0xaa5 [<c01468c4>] lockdep_acquire+0x68/0x84 [<c10487f4>] _spin_lock_irqsave+0x2a/0x3a [<c04ff8d2>] startup_msi_irq_wo_maskbit+0x10/0x35 [<c015b932>] probe_irq_on+0x44/0x107 [<c0673d58>] serial8250_config_port+0x84b/0x986 [<c06707b1>] uart_add_one_port+0x105/0x289 [<c1ace54b>] serial8250_init+0xc3/0x10a [<c0100457>] init+0x14a/0x2cb [<c0102005>] kernel_thread_helper+0x5/0xb Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: nmi watchdog header cleanupDon Zickus2006-06-261-0/+1
| | | | | | | | Misc header cleanup for nmi watchdog. Signed-off-by: Don Zickus <dzickus@redhat.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386/x86-64: simplify ioapic_register_intr()Jan Beulich2006-06-261-15/+8
| | | | | | | | Simplify (remove duplication of) code in ioapic_register_intr(). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: serialize assign_irq_vector() use of static variablesJan Beulich2006-06-261-6/+18
| | | | | | | | | Since assign_irq_vector() can be called at runtime, its access of static variables should be protected by a lock. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: kernel irq balance doesn't workZhang Yanmin2006-06-231-11/+20
| | | | | | | | | | | | | | | | | | | | | | | | On i386, kernel irq balance doesn't work. 1) In function do_irq_balance, after kernel finds the min_loaded cpu but before calling set_pending_irq to really pin the selected_irq to the target cpu, kernel does a cpus_and with irq_affinity[selected_irq]. Later on, when the irq is acked, kernel would calls move_native_irq=>desc->handler->set_affinity to change the irq affinity. However, every function pointed by hw_interrupt_type->set_affinity(unsigned int irq, cpumask_t cpumask) always changes irq_affinity[irq] to cpumask. Next time when recalling do_irq_balance, it has to do cpu_ands again with irq_affinity[selected_irq], but irq_affinity[selected_irq] already becomes one cpu selected by the first irq balance. 2) Function balance_irq in file arch/i386/kernel/io_apic.c has the same issue. [akpm@osdl.org: cleanups] Signed-off-by: Zhang Yanmin <yanmin.zhang@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: avoid IRQ0 ioapic pin collisionKimball Murray2006-05-081-0/+5
| | | | | | | | | | | | | | | | | | The patch addresses a problem with ACPI SCI interrupt entry, which gets re-used, and the IRQ is assigned to another unrelated device. The patch corrects the code such that SCI IRQ is skipped and duplicate entry is avoided. Second issue came up with VIA chipset, the problem was caused by original patch assigning IRQs starting 16 and up. The VIA chipset uses 4-bit IRQ register for internal interrupt routing, and therefore cannot handle IRQ numbers assigned to its devices. The patch corrects this problem by allowing PCI IRQs below 16. Cc: len.brown@intel.com Signed-off by: Natalie Protasevich <Natalie.Protasevich@unisys.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Don't pass boot parameters to argv_init[]OGAWA Hirofumi2006-03-311-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | The boot cmdline is parsed in parse_early_param() and parse_args(,unknown_bootoption). And __setup() is used in obsolete_checksetup(). start_kernel() -> parse_args() -> unknown_bootoption() -> obsolete_checksetup() If __setup()'s callback (->setup_func()) returns 1 in obsolete_checksetup(), obsolete_checksetup() thinks a parameter was handled. If ->setup_func() returns 0, obsolete_checksetup() tries other ->setup_func(). If all ->setup_func() that matched a parameter returns 0, a parameter is seted to argv_init[]. Then, when runing /sbin/init or init=app, argv_init[] is passed to the app. If the app doesn't ignore those arguments, it will warning and exit. This patch fixes a wrong usage of it, however fixes obvious one only. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] for_each_possible_cpu: i386KAMEZAWA Hiroyuki2006-03-281-2/+2
| | | | | | | | | | This patch replaces for_each_cpu with for_each_possible_cpu. under arch/i386. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] more for_each_cpu() conversionsAndrew Morton2006-03-231-13/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we stop allocating percpu memory for not-possible CPUs we must not touch the percpu data for not-possible CPUs at all. The correct way of doing this is to test cpu_possible() or to use for_each_cpu(). This patch is a kernel-wide sweep of all instances of NR_CPUS. I found very few instances of this bug, if any. But the patch converts lots of open-coded test to use the preferred helper macros. Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Acked-by: Kyle McMartin <kyle@parisc-linux.org> Cc: Anton Blanchard <anton@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: Andi Kleen <ak@muc.de> Cc: Christian Zankel <chris@zankel.net> Cc: Philippe Elie <phil.el@wanadoo.fr> Cc: Nathan Scott <nathans@sgi.com> Cc: Jens Axboe <axboe@suse.de> Cc: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86: deterine xapic using apic versionShaohua Li2006-03-231-1/+2
| | | | | | | | | | | | Checking APIC version instead of CPU family to determine XAPIC. Family 6 CPU could have xapic as well. Signed-off-by: Shaohua Li<shaohua.li@intel.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: "Seth, Rohit" <rohit.seth@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: port ATI timer fix from x86_64 to i386 IIAndi Kleen2006-03-081-1/+18
| | | | | | | | | | | | | | | | | | | | | | | | | | ATI chipsets tend to generate double timer interrupts for the local APIC timer when both the 8254 and the IO-APIC timer pins are enabled. This is because they route it to both and the result is anded together and the CPU ends up processing it twice. This patch changes check_timer to disable the 8254 routing for interrupt 0. I think it would be safe on all chipsets actually (i tested it on a couple and it worked everywhere) and Windows seems to do it in a similar way, but to be conservative this patch only enables this mode on ATI (and adds options to enable/disable too) Ported over from a similar x86-64 change. I reused the ACPI earlyquirk infrastructure for the ATI bridge check, but tweaked it a bit to work even without ACPI. Inspired by a patch from Chuck Ebbert, but redone. Cc: Chuck Ebbert <76306.1226@compuserve.com> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: Handle non existing APICs without panicingAndreas Deresch2006-02-261-2/+4
| | | | | | | | | | | | [description from AK] This fixes booting in APIC mode on some ACER laptops. x86-64 did a similar change some time ago. See http://bugzilla.kernel.org/show_bug.cgi?id=4700 for details Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86_64: Memorize location of i8259 for reboots.Eric W. Biederman2006-01-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we attempt to restore virtual wire mode on reboot, which only works if we can figure out where the i8259 is connected. This is very useful when we are kexec another kernel and likely helpful to an peculiar BIOS that make assumptions about how the system is setup. Since the acpi MADT table does not provide the location where the i8259 is connected we have to look at the hardware to figure it out. Most systems have the i8259 connected the local apic of the cpu so won't be affected but people running Opteron and some serverworks chipsets should be able to use kexec now. In addition this patch removes the hard coded assumption that the io_apic that delivers isa interrups is always known to the kernel as io_apic 0. There does not appear to be anything to guarantee that assumption is true. And From: Vivek Goyal <vgoyal@in.ibm.com> A minor fix to the patch which remembers the location of where i8259 is connected. Now counter i has been replaced by apic. counter i is having some junk value which was leading to non-detection of i8259 connected to IOAPIC. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: ioapic virtual wire mode fixVivek Goyal2006-01-061-2/+2
| | | | | | | | | | | | | | | | | | | | | o Currently, during kexec reboot, IOAPIC is re-programmed back to virtual wire mode if there was an i8259 connected to it. This enables getting timer interrupts in second kernel in legacy mode. o After putting into virtual wire mode, IOAPIC delivers the i8259 interrupts to CPU0. This works well for kexec but not for kdump as we might crash on a different CPU and second kernel will not see timer interrupts. o This patch modifies the redirection table entry to deliver the timer interrupts to the cpu we are rebooting (instead of hardcoding to zero). This ensures that second kernel receives timer interrupts even on a non-boot cpu. Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com> Cc: Andi Kleen <ak@muc.de> Cc: "Seth, Rohit" <rohit.seth@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] setting irq affinity is broken in ia32 with MSI enabledShaohua Li2005-11-291-2/+2
| | | | | | | | | | Setting irq affinity stops working when MSI is enabled. With MSI, move_irq is empty, so we can't change irq affinity. It appears a typo in Ashok's original commit for this issue. X86_64 actually is using move_native_irq. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Revert "i386: move apic init in init_IRQs"Linus Torvalds2005-10-311-5/+1
| | | | | | | | Commit f2b36db692b7ff6972320ad9839ae656a3b0ee3e causes a bootup hang on at least one machine. Revert for now until we understand why. The old code may be ugly, but it works. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: move apic init in init_IRQsEric W. Biederman2005-10-301-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | All kinds of ugliness exists because we don't initialize the apics during init_IRQs. - We calibrate jiffies in non apic mode even when we are using apics. - We have to have special code to initialize the apics when non-smp. - The legacy i8259 must exist and be setup correctly, even when we won't use it past initialization. - The kexec on panic code must restore the state of the io_apics. - init/main.c needs a special case for !smp smp_init on x86 In addition to pure code movement I needed a couple of non-obvious changes: - Move setup_boot_APIC_clock into APIC_late_time_init for simplicity. - Use cpu_khz to generate a better approximation of loops_per_jiffies so I can verify the timer interrupt is working. - Call setup_apic_nmi_watchdog again after cpu_khz is initialized on the boot cpu. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386 io_apic.c: Memorize at bootup where the i8259 is connectedEric W. Biederman2005-10-301-35/+112
| | | | | | | | | | | | | | | | | | | | | | Currently we attempt to restore virtual wire mode on reboot, which only works if we can figure out where the i8259 is connected. This is very useful when we kexec another kernel and likely helpful when dealing with a BIOS that make assumptions about how the system is setup. Since the acpi MADT table does not provide the location where the i8259 is connected we have to look at the hardware to figure it out. Most systems have the i8259 connected the local apic of the cpu so won't be affected but people running Opteron and some serverworks chipsets should be able to use kexec now. In addition this patch removes the hard coded assumption that the io_apic that delivers isa interrups is always known to the kernel as io_apic 0. As there does not appear to be anything to guarantee that assumption is true. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] useless includes of linux/irq.h in arch/i386Al Viro2005-09-261-1/+0
| | | | | | | | | | Most of these guys are simply not needed (pulled by other stuff via asm-i386/hardirq.h). One that is not entirely useless is hilarious - arch/i386/oprofile/nmi_timer_int.c includes linux/irq.h... as a way to get linux/errno.h Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] x86-64: i386/x86-64: Fix time going twice as fast problem on ATI ↵Chuck Ebbert2005-09-121-0/+4
| | | | | | | | | | | Xpress chipsets Original patch from Bertro Simul This is probably still not quite correct, but seems to be the best solution so far. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] i386: fix-up schedule_timeout() usageNishanth Aravamudan2005-09-101-2/+1
| | | | | | | | | Use schedule_timeout_interruptible() instead of set_current_state()/schedule_timeout() to reduce kernel size. Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Fix misspelled i8259 typo in io_apic.cKarsten Wiese2005-09-091-2/+2
| | | | | | | | The legacy PIC's name is "i8259". Signed-off-by: Karsten Wiese <annabellesgarden@yahoo.de> Signed-off-by: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge linux-2.6 with linux-acpi-2.6Len Brown2005-09-081-31/+34
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| * [PATCH] Additions to .data.read_mostly sectionRavikiran G Thirumalai2005-09-071-5/+5
| | | | | | | | | | | | | | | | | | | | Mark variables which are usually accessed for reads with __readmostly. Signed-off-by: Alok N Kataria <alokk@calsoftinc.com> Signed-off-by: Shai Fultheim <shai@scalex86.org> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| * [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinityAshok Raj2005-09-071-26/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When handling writes to /proc/irq, current code is re-programming rte entries directly. This is not recommended and could potentially cause chipset's to lockup, or cause missing interrupts. CONFIG_IRQ_BALANCE does this correctly, where it re-programs only when the interrupt is pending. The same needs to be done for /proc/irq handling as well. Otherwise user space irq balancers are really not doing the right thing. - Changed pending_irq_balance_cpumask to pending_irq_migrate_cpumask for lack of a generic name. - added move_irq out of IRQ_BALANCE, and added this same to X86_64 - Added new proc handler for write, so we can do deferred write at irq handling time. - Display of /proc/irq/XX/smp_affinity used to display CPU_MASKALL, instead it now shows only active cpu masks, or exactly what was set. - Provided a common move_irq implementation, instead of duplicating when using generic irq framework. Tested on i386/x86_64 and ia64 with CONFIG_PCI_MSI turned on and off. Tested UP builds as well. MSI testing: tbd: I have cards, need to look for a x-over cable, although I did test an earlier version of this patch. Will test in a couple days. Signed-off-by: Ashok Raj <ashok.raj@intel.com> Acked-by: Zwane Mwaikambo <zwane@holomorphy.com> Grudgingly-acked-by: Andi Kleen <ak@muc.de> Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org> Signed-off-by: Ashok Raj <ashok.raj@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [ACPI] delete CONFIG_ACPI_BOOTLen Brown2005-08-241-2/+2
|/ | | | | | it has been a synonym for CONFIG_ACPI since 2.6.12 Signed-off-by: Len Brown <len.brown@intel.com>
* [PATCH] x86: i8253/i8259A lock cleanupIngo Molnar2005-06-301-1/+1
| | | | | | | | Introduce proper declarations for i8253_lock and i8259A_lock. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge Christoph's freeze cleanup patchLinus Torvalds2005-06-251-1/+1
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| * [PATCH] Cleanup patch for process freezingChristoph Lameter2005-06-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Establish a simple API for process freezing defined in linux/include/sched.h: frozen(process) Check for frozen process freezing(process) Check if a process is being frozen freeze(process) Tell a process to freeze (go to refrigerator) thaw_process(process) Restart process frozen_process(process) Process is frozen now 2. Remove all references to PF_FREEZE and PF_FROZEN from all kernel sources except sched.h 3. Fix numerous locations where try_to_freeze is manually done by a driver 4. Remove the argument that is no longer necessary from two function calls. 5. Some whitespace cleanup 6. Clear potential race in refrigerator (provides an open window of PF_FREEZE cleared before setting PF_FROZEN, recalc_sigpending does not check PF_FROZEN). This patch does not address the problem of freeze_processes() violating the rule that a task may only modify its own flags by setting PF_FREEZE. This is not clean in an SMP environment. freeze(process) is therefore not SMP safe! Signed-off-by: Christoph Lameter <christoph@lameter.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] get rid of redundant NULL checks before kfree() in arch/i386/Jesper Juhl2005-06-251-4/+2
| | | | | | | | | | | | Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] kexec: x86: resture apic virtual wire mode on shutdownEric W. Biederman2005-06-251-1/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When coming out of apic mode attempt to set the appropriate apic back into virtual wire mode. This improves on previous versions of this patch by by never setting bot the local apic and the ioapic into veritual wire mode. This code looks at data from the mptable to see if an ioapic has an ExtInt input to make this decision. A future improvement is to figure out which apic or ioapic was in virtual wire mode at boot time and to remember it. That is potentially a more accurate method, of selecting which apic to place in virutal wire mode. Signed-off-by: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] i386 CPU hotplugZwane Mwaikambo2005-06-251-0/+2
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (The i386 CPU hotplug patch provides infrastructure for some work which Pavel is doing as well as for ACPI S3 (suspend-to-RAM) work which Li Shaohua <shaohua.li@intel.com> is doing) The following provides i386 architecture support for safely unregistering and registering processors during runtime, updated for the current -mm tree. In order to avoid dumping cpu hotplug code into kernel/irq/* i dropped the cpu_online check in do_IRQ() by modifying fixup_irqs(). The difference being that on cpu offline, fixup_irqs() is called before we clear the cpu from cpu_online_map and a long delay in order to ensure that we never have any queued external interrupts on the APICs. There are additional changes to s390 and ppc64 to account for this change. 1) Add CONFIG_HOTPLUG_CPU 2) disable local APIC timer on dead cpus. 3) Disable preempt around irq balancing to prevent CPUs going down. 4) Print irq stats for all possible cpus. 5) Debugging check for interrupts on offline cpus. 6) Hacky fixup_irqs() to redirect irqs when cpus go off/online. 7) play_dead() for offline cpus to spin inside. 8) Handle offline cpus set in flush_tlb_others(). 9) Grab lock earlier in smp_call_function() to prevent CPUs going down. 10) Implement __cpu_disable() and __cpu_die(). 11) Enable local interrupts in cpu_enable() after fixup_irqs() 12) Don't fiddle with NMI on dead cpu, but leave intact on other cpus. 13) Program IRQ affinity whilst cpu is still in cpu_online_map on offline. Signed-off-by: Zwane Mwaikambo <zwane@linuxpower.ca> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Remove i386_ksyms.c, almost.Alexey Dobriyan2005-06-231-1/+2
| | | | | | | | | | | | | | | | | | | | * EXPORT_SYMBOL's moved to other files * #include <linux/config.h>, <linux/module.h> where needed * #include's in i386_ksyms.c cleaned up * After copy-paste, redundant due to Makefiles rules preprocessor directives removed: #ifdef CONFIG_FOO EXPORT_SYMBOL(foo); #endif obj-$(CONFIG_FOO) += foo.o * Tiny reformat to fit in 80 columns Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] Do not enforce unique IO_APIC_ID check for xAPIC systems (i386)Natalie Protasevich2005-06-231-4/+6
| | | | | | | | | | | | | This patch is per Andi's request to remove NO_IOAPIC_CHECK from genapic and use heuristics to prevent unique I/O APIC ID check for systems that don't need it. The patch disables unique I/O APIC ID check for Xeon-based and other platforms that don't use serial APIC bus for interrupt delivery. Andi stated that AMD systems don't need unique IO_APIC_IDs either. Signed-off-by: Natalie Protasevich <Natalie.Protasevich@unisys.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] check nmi watchdog is brokenJack F Vogel2005-05-011-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | A bug against an xSeries system showed up recently noting that the check_nmi_watchdog() test was failing. I have been investigating it and discovered in both i386 and x86_64 the recent change to the routine to use the cpu_callin_map has uncovered a problem. Prior to that change, on an SMP box, the test was trivally passing because all cpu's were found to not yet be online, but now with the callin_map they are discovered, it goes on to test the counter and they have not yet begun to increment, so it announces a CPU is stuck and bails out. On all the systems I have access to test, the announcement of failure is also bougs... by the time you can login and check /proc/interrupts, the NMI count is happily incrementing on all CPUs. Its just that the test is being done too early. I have tried moving the call to the test around a bit, and it was always too early. I finally hit on this proposed solution, it delays the routine via a late_initcall(), seems like the right solution to me. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] pm_message_t: more fixes in common and i386Pavel Machek2005-04-161-1/+1
| | | | | | | | | | I thought I'm done with fixing u32 vs. pm_message_t ... unfortunately that turned out not to be the case as Russel King pointed out. Here are fixes for Documentation and common code (mainly system devices). Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+2545
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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