linux-kernel - PCI Interrupt

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 18 Sep 2007 14:17:32 +0100
From:	Duncan.Perrett@...kta.com
To:	linux-kernel@...r.kernel.org
Subject: PCI Interrupt

I have a CAN PCI card installed on my Ubuntu box.
I understand that PCI interrupts should be level rather than edge
triggered.

The output of cat /proc/interrupts is :-

           CPU0
  0:    1614601    IO-APIC-edge  timer
  1:        164    IO-APIC-edge  i8042
  8:          3    IO-APIC-edge  rtc
  9:          1   IO-APIC-level  acpi
 12:          0    IO-APIC-edge  CAN-ACx-PCI_01
 14:      65786    IO-APIC-edge  ide0
169:       3220   IO-APIC-level  eth0, i915@pci:0000:00:02.0
177:      46459   IO-APIC-level  eth1
209:          0   IO-APIC-level  uhci_hcd:usb3, eth2
217:          2   IO-APIC-level  uhci_hcd:usb1, ehci_hcd:usb4
225:        697   IO-APIC-level  uhci_hcd:usb2
NMI:          0
LOC:    1614399
ERR:          0
MIS:          0

You see that irq 12 CAN-ACx-PCI_01 is edge triggered.
Is there any way of forcing the BIOS to see the interrupt as a
level-triggered one?

*******************Internet Email Confidentiality Footer*******************
The contents of this e-mail message (including any attachments hereto) are
confidential to and are intended to be conveyed for the use of the
recipient to whom it is addressed only. If you receive this transmission in
error, please notify the sender of this immediately and delete the message
from your system. Any distribution, reproduction or use of this message by
someone other than recipient is not authorized and may be unlawful.
Elekta Limited is a company registered in England and Wales whose
registered number is 3244454 and whose registered address is Linac House,
Fleming Way, Crawley, West Sussex, RH10 9RR

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/