genirq: use iterators for irq_desc loops

Use for_each_irq_desc[_reverse] for all the iteration loops.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

proc: fixup irq iterator

There is no need for irq_desc here. Even for sparse_irq we can
handle this clever in for_each_irq_nr().

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

genirq: add reverse iterator for irq_desc

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

x86: move ack_bad_irq() to irq.c

Share more duplicated code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

x86: unify show_interrupts() and proc helpers

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>

x86: cleanup show_interrupts

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>

genirq: cleanup the sparseirq modifications

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

genirq: remove artifacts from sparseirq removal

Signed-off-by: Ingo Molnar <mingo@elte.hu>

genirq: revert dynarray

Revert the dynarray changes. They need more thought and polishing.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

genirq: remove irq_to_desc_alloc

Remove the leftover of sparseirqs.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

genirq: remove sparse irq code

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>

genirq: use inline function for irq_to_desc

For the non sparse irq case an inline function is perfectly fine.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

genirq: consolidate nr_irqs and for_each_irq_desc()

Move all of those to linux/irq.h where they belong.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

x86: remove sparse irq from Kconfig

This code is not ready yet.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

genirq: define nr_irqs for architectures with GENERIC_HARDIRQS=n

Revert the sparse irq changes in m68k/s390/sparc and just define
nr_irqs as NR_IRQS for those architectures.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

x86: apic - unify APIC_DIVISOR

Use APIC_DIVISOR being set to 16 for both 32/64bit
mode. To escape APIC timer underflow during calibration
set it to the maximum possible value.

Also typo error (CONFG instead of proper CONFIG) fixed.
The error was caught by Venkatesh Pallipadi, thanks a lot Venkatesh!

See details on http://lkml.org/lkml/2008/10/9/425

Reported-by: Venkatesh Pallipad <venkatesh.pallipadi@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: sparse_irq: fix typo in debug print out

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: Add sysfs entries for UV v4

Create /sys/firmware/sgi_uv sysfs entries for partition_id and coherence_id.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: Add UV partition call v4

Add a bios call to return partitioning related info.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: Add UV bios call infrastructure v4

Add the EFI callback function and associated wrapper code.
Initialize SAL system table entry info at boot time.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: Add UV EFI table entry v4

Look for a UV entry in the EFI tables.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86, UV: add uv_setup_irq() and uv_teardown_irq() functions, v3, fix

fix:

 arch/x86/kernel/uv_irq.c: In function 'uv_ack_apic':
 arch/x86/kernel/uv_irq.c:26: error: implicit declaration of function 'ack_APIC_irq'

Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86, UV: add uv_setup_irq() and uv_teardown_irq() functions, v3

Provide a means for UV interrupt MMRs to be setup with the message to be sent
when an MSI is raised.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

hpet: clean up warning

Fix the below compile warnings due to recent HPET MSI changes

arch/x86/kernel/hpet.c:48: warning: 'hpet_devs' defined but not used
arch/x86/kernel/hpet.c:50: warning: 'per_cpu__cpu_hpet_dev' defined but not used

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: print out irq nr for msi/ht, v3

v2: fix hpet compiling error
v3: Bjorn want to use dev_printk instead

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - interrupt remapping fix

Clean up obscure for() cycle with straight while() form

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: irq no should not use hex in /proc/interrupts

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>

x86: fix typo in irq_desc array

when SPARSE_IRQ is not used, should still use irq_desc->lock

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86, uv: fix ordering of calls to uv_system_init & uv_cpu_init

Fix problem caused by reordering of the calls to uv_cpu_init() &
uv_system_init. Originally, uv_cpu_init() was called AFTER uv_system_init.
This order was recently broken as a side-effect of other patches.

With this patch, initialization of cpu 0 is now done by the system_init
call.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - interrupt remapping fix

Interrupt remapping could lead to NULL dereference in case of
kzalloc failed and memory leak in other way. So fix the
both cases.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

fix warning: "x86: sparse_irq needs spin_lock in allocations"

caused by

commit a532e19680ada3b8579b81e67e76d3ebd19c340f
Author: Yinghai Lu <yhlu.kernel@gmail.com>
Date:   Wed Aug 20 20:46:25 2008 -0700

    x86: sparse_irq needs spin_lock in allocations

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

sparseirq: remove some debug print out

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

irq: fix irqpoll && sparseirq

Steven Noonan reported a boot hang when using irqpoll and
CONFIG_HAVE_SPARSE_IRQ=y.

The irqpoll loop needs to be updated to not iterate from 1 to nr_irqs
but to iterate via for_each_irq_desc(). (in the former case desc can
be NULL which crashes the box)

Reported-by: Steven Noonan <steven@uplinklabs.net>
Tested-by: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - do not use KERN_DEBUG marker too much, fix

Yinghai Lu reported:

| >  0 add_pin_to_irq: irq 15 --> apic 0 pin 15
| > IOAPIC[0]: Set routing entry (8-15 -> 0x3f -> IRQ 15 Mode:0 Active:0)
| >  8-16 8-17 8-18 8-19 8-20 8-21 8-22 8-23 (apicid-pin) not connected
| >  9-0 9-1 9-2 9-3 9-4 9-5 9-6 9-7 9-8 9-9 9-10 9-11 9-12 9-13 9-14 9-15
| > 9-16 9-17 9-18 9-19 9-20 9-21 9-22 9-23 (apicid-pin) not connected
| >
|
| only first one not connected at first, and ...

here is a quick fix for this.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - fix unused vars warning in calibrate_APIC_clock

If we don't have CONFIG_X86_PM_TIMER=y compiler warns about
unused variables. Move PM timer based calibration into a
separate function and make the code cleaner and the compiler
happy as well.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - skip writting ESR register if we dont have on

On 82489DX we don't have ESR register so we should not
write it.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - lapic_setup_esr does not handle esr_disable - fix it

lapic_setup_esr doesn't handle esr_disable inquire.
The error brought in during unification process.
Fix it.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dyn_array: use %pF instead of print_fn_descriptor_symbol

... and tidy up the printouts. Suggested by Andrew Morton.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: print out apic id in hex format

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - get rid of __DO_ACTION macro

Replace __DO_ACTION macro with io_apic_modify_irq function.
This allow us to 'grep' definitions being hided by
__DO_ACTION macro:

__unmask_IO_APIC_irq
__mask_IO_APIC_irq
__mask_and_edge_IO_APIC_irq
__unmask_and_level_IO_APIC_irq

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: fix HPET compiler error when not using CONFIG_PCI_MSI

Added dummy function for hpet_setup_msi_irq().

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: using HPET in MSI mode and setting up per CPU HPET timers, fix

On Sat, Sep 06, 2008 at 06:03:53AM -0700, Ingo Molnar wrote:
>
> it crashes two testsystems, the fault on a NULL pointer in hpet init,
> with:
>
> initcall print_all_ICs+0x0/0x520 returned 0 after 26 msecs
> calling  hpet_late_init+0x0/0x1c0
> BUG: unable to handle kernel NULL pointer dereference at 000000000000008c
> IP: [<ffffffff80d228be>] hpet_late_init+0xfe/0x1c0
> PGD 0
> Oops: 0000 [1] SMP
> CPU 0
> Modules linked in:
> Pid: 1, comm: swapper Not tainted 2.6.27-rc5 #29725
> RIP: 0010:[<ffffffff80d228be>]  [<ffffffff80d228be>] hpet_late_init+0xfe/0x1c0
> RSP: 0018:ffff88003fa07dd0  EFLAGS: 00010246
> RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
> RDX: ffffc20000000160 RSI: 0000000000000000 RDI: 0000000000000003
> RBP: ffff88003fa07e90 R08: 0000000000000000 R09: ffff88003fa07dd0
> R10: 0000000000000001 R11: 0000000000000000 R12: ffff88003fa07dd0
> R13: 0000000000000002 R14: ffffc20000000000 R15: 000000006f57e511
> FS:  0000000000000000(0000) GS:ffffffff80cf6a80(0000) knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 000000000000008c CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 1, threadinfo ffff88003fa06000, task ffff88003fa08000)
> Stack:  00000000fed00000 ffffc20000000000 0000000100000003 0000000800000002
>  0000000000000000 0000000000000000 0000000000000000 0000000000000000
>  0000000000000000 0000000000000000 0000000000000000 0000000000000000
> Call Trace:
>  [<ffffffff80d227c0>] ? hpet_late_init+0x0/0x1c0
>  [<ffffffff80209045>] do_one_initcall+0x45/0x190
>  [<ffffffff80296f39>] ? register_irq_proc+0x19/0xe0
>  [<ffffffff80d0d140>] ? early_idt_handler+0x0/0x73
>  [<ffffffff80d0dabc>] kernel_init+0x14c/0x1b0
>  [<ffffffff80942ac1>] ? trace_hardirqs_on_thunk+0x3a/0x3f
>  [<ffffffff8020dbd9>] child_rip+0xa/0x11
>  [<ffffffff8020ceee>] ? restore_args+0x0/0x30
>  [<ffffffff80d0d970>] ? kernel_init+0x0/0x1b0
>  [<ffffffff8020dbcf>] ? child_rip+0x0/0x11
> Code: 20 48 83 c1 01 48 39 f1 75 e3 44 89 e8 4c 8b 05 29 29 22 00 31 f6 48 8d 78 01 66 66 90 89 f0 48 8d 04 80 48 c1 e0 05 4a 8d 0c 00 <f6> 81 8c 00 00 00 08 74 26 8b 81 80 00 00 00 8b 91 88 00 00 00
> RIP  [<ffffffff80d228be>] hpet_late_init+0xfe/0x1c0
>  RSP <ffff88003fa07dd0>
> CR2: 000000000000008c
> Kernel panic - not syncing: Fatal exception

There was one code path, with CONFIG_PCI_MSI disabled, where we were accessing
hpet_devs without initialization. That resulted in the above crash. The change
below adds a check for hpet_devs.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - do not use KERN_DEBUG marker too much

Do not use KERN_DEBUG several times on the same line being printed.
Introduced by mine previous patch, sorry.

Reported-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: lapic address print out like io apic addr

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dyn_array: remove one panic

Andrew said, we don't need duplicated panic.
because __alloc_bootmem already have that.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - code style cleaning for setup_IO_APIC_irqs

By changing printout form we are able to shrink (and clean up) code a bit.

Former printout example:

init IO_APIC IRQs
 IO-APIC (apicid-pin) 1-1, 1-2, 1-3 not connected.
 IO-APIC (apicid-pin) 2-1, 2-2, 2-3 not connected.

New printout example:

init IO_APIC IRQs
 1-1 1-2 1-3 (apicid-pin) not connected
 2-1 2-2 2-3 (apicid-pin) not connected

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: HPET_MSI Initialise per-cpu HPET timers

Initialize a per CPU HPET MSI timer when possible. We retain the HPET
timer 0 (IRQ 0) and timer 1 (IRQ 8) as is when legacy mode is being used. We
setup the remaining HPET timers as per CPU MSI based timers. This per CPU
timer will eliminate the need for timer broadcasting with IRQ 0 when there
is non-functional LAPIC timer across CPU deep C-states.

If there are more CPUs than number of available timers, CPUs that do not
find any timer to use will continue using LAPIC and IRQ 0 broadcast.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: HPET_MSI Basic HPET_MSI setup code, cleanups

small style cleanups.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: HPET_MSI Basic HPET_MSI setup code

Basic HPET MSI setup code. Routines to perform basic MSI read write
in HPET memory map and setting up irq_chip for HPET MSI.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: HPET_MSI Refactor code in preparation for HPET_MSI

Preparatory patch before the actual HPET MSI changes. Sets up hpet_set_mode
and hpet_next_event for the MSI related changes. Just the code
refactoring and should be zero functional change.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: HPET_MSI change IRQ affinity in process context when it is disabled

Change the IRQ affinity in the process context when the IRQ is disabled.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

irq: error missed ifndef CONFIG_HAVE_SPARSE_IRQ, v2

need to change irq to int too

Signed-off-by: Ingo Molnar <mingo@elte.hu>

irq: set_irq_chip() has redundant call to irq_to_desc()

Extraneous call to irq_to_desc().

Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

irq: error missed ifndef CONFIG_HAVE_SPARSE_IRQ

An error return from create_irq_nr() is 0, but an error return from
create_irq() is -1.

Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - declare irq_cfg_lock for SPARSE_IRQ only

We use irq_cfg_lock lock in SPARSE_IRQ only context so
move it under #ifdef and compiler will be happy.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: io-apic - use ARRAY_SIZE macro

Make the code width a bit shorter with ARRAY_SIZE macro.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dyn_array: fix typo

Andrew found the typo could break some platforms.

also fix a checkpatch warning.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: print out if acpi want physical flat of all

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dyn_array: don't break compiling for !CONFIG_SMP

Impact: build failure on uniprocessor

When compiling for !CONFIG_SMP, per_cpu_alloc_dyn_array() would fail
to compile, since it uses per_cpu_offset, which is not defined for
uniprocessor builds.

Hence, do not compile per_cpu_alloc_dyn_array() for !CONFIG_SMP.
Attempting to call this function in a uniprocessor configuration would
be simply wrong in the first place.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

dmar: fix dmar_parse_dev() devices_cnt error condition check

It is possible that,
instead of PCI endpoint/sub-hierarchy structures, only IO-APIC/HPET
devices may be reported under device scope structures. Fix the devices_cnt
error check, which cares about only PCI structures and removes the
dma-remapping unit structure (dmaru) when the devices_cnt is zero
and include_all flag is not set.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dmar: use list_for_each_entry_safe() in dmar_dev_scope_init()

In dmar_dev_scope_init(), functions called under for_each_drhd_unit()/
for_each_rmrr_units() can delete the list entry under some error conditions.

So we should use list_for_each_entry_safe() for safe traversal.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dmar: initialize the return value in dmar_parse_dev()

initialize the return value in dmar_parse_dev()

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dmar: fix using early fixmap mapping for DMAR table parsing

Very early detection of the DMAR tables will setup fixmap mapping. For
parsing these tables later (while enabling dma and/or interrupt remapping),
early fixmap mapping shouldn't be used. Fix it by calling table detection
routines again, which will call generic apci_get_table() for setting up
the correct mapping.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x2apic: fix reserved APIC register accesses in print_local_APIC()

APIC_ARBPRI is a reserved register for XAPIC and beyond.
APIC_RRR is a reserved register except for 82489DX, APIC for Pentium processors.
APIC_EOI is a write only register.
APIC_DFR is reserved in x2apic mode.

Access to these registers in x2apic will result in #GP fault. Fix these
apic register accesses.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

sparseirq: export nr_irqs on m68k/sparc/s390

Stephen Rothwell reported such build failures on m68k/sparc/s390:

> ERROR: "nr_irqs" [drivers/net/hamradio/baycom_ser_fdx.ko] undefined!
> ERROR: "nr_irqs" [drivers/net/3c59x.ko] undefined!

export nr_irqs on these architectures too.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - unify smp_spurious/error_interrupt declaration

According to entry_64.S we do pass pt_regs pointer
into interrupt handlers but don't use them. So we
safely may merge the declarations.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

sparseirq: move kstat_irqs from kstat to irq_desc - fix

fix non-sparseirq architectures.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: let 64 bit to use 32 bit calibrate_apic_clock

Use the 32-bit APIC calibration code - it's more mature.

Signed-of-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: rename apic_32.c and apic_64.c to apic.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic copy apic_64.c to apic_32.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic copy calibrate_APIC_clock to each other in apic_32/64.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic unify smp_spurious/error_interrupt

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: merge header files in apic_xx.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: copy detect_init_APIC to the other

Signed-off-by: Yinghai Lu <yhlu.kernel@mgail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: merge APIC_init_uniprocessor

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: make apic_32/64.c more like

except x2apic, detec_init_APIC, and calibrating_APIC_clock

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: add hard_smp_prossor_id with MACRO in io_apic_xx.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: use HAVE_X2APIC in apic_64.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic_xx.c order variables

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - unify smp_apic_timer_interrupt

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic_32.c should use __cpuinit section

All callers are __init or __cpuinit so there is no need
to hold this code without CPU_HOTPLUG being set.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - unify setup_local_APIC

- remove useless read of APIC_LVR
- wrap with preempt_disable/enable
- check for integrated APIC just in place

v2: fix by Yinghai Lu.
fix lapic_is_integrated using
let 64-bit too have pic_mode

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic_64.c - add sanity check for spurious vector definition

Do not check for SPUTIOUS_APIC_VECTOR definition twice.
Check it once - is what we need.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - unify setup_apicpmtimer

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic - introduce get_physical_broadcast for 64bit

We don't really use it now on 64bit mode but
could reserve it for future.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: apic_64.c - setup_APIC_timer has to be __cpuinit function

There is no need to hold this code if CPU_HOTPLUG is not
defined.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: VMI, initialize IRQ vector

Initialize vector_irq for the vmi used vector, to point to correct irq.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: fix probe_nr_irqs for xen

otherwise Xen is _completely_ unusable with 5 or more VCPUs.
(when !CONFIG_HAVE_SPARSE_IRQ).

based on Alex Nixon's patch.

also add +1 offset after redir_entries

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Alex Nixon <alex.nixon@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: fix 32-bit ioapic lockup with sparseirqs

Missed two lines when copying.

Fix panic on one of Ingo's machines that need to adjust ioapic id when
acpi off/ 32bit.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: sparse_irq needs spin_lock in allocations

Suresh Siddha noticed that we should have a spinlock around it.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

sparseirq: fix intr-remap with dyn_array/nr_irqs changes]

In irq_2_iommu_alloc() and set_irte_irq(), irq_to_desc or
irq_2_iommu pointers may not be allocated. So use the routines
which will allocate them if they are not already allocated.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

warning: fix arch x86 kernel io_apic c

fix warning:

  arch/x86/kernel/io_apic.c: In function ‘print_local_APIC’:
  arch/x86/kernel/io_apic.c:1786: warning: format ‘%08x’ expects type ‘unsigned int’, but argument 2 has type ‘u64’
  arch/x86/kernel/io_apic.c:1787: warning: format ‘%08x’ expects type ‘unsigned int’, but argument 2 has type ‘u64’

By creating uniform behavior on 32-bit and 64-bit and printing out the ICR
value in two 32-bit words.

Code has changed:

   text    data     bss     dec     hex filename
  22901   19650   17040   59591    e8c7 io_apic.o.before
  22899   19650   17040   59589    e8c5 io_apic.o.after

Due to the 32-bit cast narrowing the printed out value on 64-bit.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

xen: Fix bug `do_IRQ: cannot handle IRQ -1 vector 0x6 cpu 1'

Following commit 9c3f2468d8339866d9ef6a25aae31a8909c6be0d, do_IRQ()
looks up the IRQ number in the per-cpu variable vector_irq.

This commit makes Xen initialise an identity vector_irq map for both X86_32 and X86_64.

Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

dyn_array: split dyn_array functions from init/main.c

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

xen: fix memory access violation bug when CONFIG_HAVE_SPARSE_IRQ is enabled

When sparse IRQs are enabled, it is not safe to assume an IRQ descriptor
exists for every possible IRQ.  This patch causes init_evtchn_cpu_bindings
to skip initialisation of IRQ descriptors which don't exist.

Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: probe nr_irqs even only mptable is used

for !CONFIG_HAVE_SPARSE_IRQ

fix:

 In file included from arch/x86/kernel/early-quirks.c:18:
 include/asm/io_apic.h: In function 'probe_nr_irqs':
 include/asm/io_apic.h:209: error: 'NR_IRQS' undeclared (first use in this function)
 include/asm/io_apic.h:209: error: (Each undeclared identifier is reported only once
 include/asm/io_apic.h:209: error: for each function it appears in.)

v2: fix by Ingo

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: make HAVE_SPARSE_IRQ support selectable

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>

x86: print local APIC of APs one by one

instead of print that of all APs at the time

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: remove first_free_entry/pin_map_size

no user now

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

x86: unify ack_apic_edge

use code in 64 to replace
move_native_irq(irq, desc);
in 32 bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>