linux-toradex.git/arch/x86/include/asm/irq_remapping.h, branch v3.12.2

iommu: Fix compile warnings with forward declarations

2013-04-19T18:34:55+00:00

The irq_remapping.h file for x86 does not include all
necessary forward declarations for the data structures used.
This causes compile warnings, so fix it.

Signed-off-by: Joerg Roedel

iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets

2013-04-18T15:00:47+00:00

A few years back intel published a spec update:
http://www.intel.com/content/dam/doc/specification-update/5520-and-5500-chipset-ioh-specification-update.pdf

For the 5520 and 5500 chipsets which contained an errata (specificially errata
53), which noted that these chipsets can't properly do interrupt remapping, and
as a result the recommend that interrupt remapping be disabled in bios.  While
many vendors have a bios update to do exactly that, not all do, and of course
not all users update their bios to a level that corrects the problem.  As a
result, occasionally interrupts can arrive at a cpu even after affinity for that
interrupt has be moved, leading to lost or spurrious interrupts (usually
characterized by the message:
kernel: do_IRQ: 7.71 No irq handler for vector (irq -1)

There have been several incidents recently of people seeing this error, and
investigation has shown that they have system for which their BIOS level is such
that this feature was not properly turned off.  As such, it would be good to
give them a reminder that their systems are vulnurable to this problem.  For
details of those that reported the problem, please see:
https://bugzilla.redhat.com/show_bug.cgi?id=887006

[ Joerg: Removed CONFIG_IRQ_REMAP ifdef from early-quirks.c ]

Signed-off-by: Neil Horman 
CC: Prarit Bhargava 
CC: Don Zickus 
CC: Don Dutile 
CC: Bjorn Helgaas 
CC: Asit Mallick 
CC: David Woodhouse 
CC: linux-pci@vger.kernel.org
CC: Joerg Roedel 
CC: Konrad Rzeszutek Wilk 
CC: Arkadiusz Miśkiewicz 
Signed-off-by: Joerg Roedel

x86, irq: Move irq_remapped out of x86 core code

2013-01-28T11:51:52+00:00

The irq_remapped function is only used in IOMMU code after
the last patch. So move its definition there too.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

x86, irq: Introduce setup_remapped_irq()

2013-01-28T11:17:28+00:00

This function does irq-remapping specific interrupt setup
like modifying the chip defaults.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

x86, io-apic: Move CONFIG_IRQ_REMAP code out of x86 core

2013-01-28T11:17:27+00:00

Move all the code to either to the header file
asm/irq_remapping.h or to drivers/iommu/.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

x86, irq: Move irq_remapping_enabled declaration to iommu code

2013-01-28T11:17:26+00:00

Remove the last left-over from this flag from x86 code.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

x86, io_apic: Move irq_remapping_enabled checks out of check_timer()

2013-01-28T11:17:26+00:00

Move these checks to IRQ remapping code by introducing the
panic_on_irq_remap() function.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

x86, io_apic: Introduce set_affinity function pointer

2013-01-28T11:17:26+00:00

With interrupt remapping a special function is used to
change the affinity of an IO-APIC interrupt. Abstract this
with a function pointer.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

x86, msi: Use IRQ remapping specific setup_msi_irqs routine

2013-01-28T11:17:25+00:00

Use seperate routines to setup MSI IRQs for both
irq_remapping_enabled cases.

Signed-off-by: Joerg Roedel 
Acked-by: Sebastian Andrzej Siewior 
Reviewed-by: Konrad Rzeszutek Wilk

irq_remap: Fix compiler warning with CONFIG_IRQ_REMAP=y

2012-05-08T09:17:29+00:00

Fix the below compiler warning:

arch/x86/include/asm/irq_remapping.h:72:19: warning: ‘struct IO_APIC_route_entry’ declared inside parameter list [enabled by default]

Signed-off-by: Suresh Siddha 
Cc: joro@8bytes.org
Cc: iommu@lists.linux-foundation.org
Cc: Joerg Roedel 
Link: http://lkml.kernel.org/r/1336460934-23592-1-git-send-email-suresh.b.siddha@intel.com
Signed-off-by: Ingo Molnar