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From: Michael Sturm <cyclonic2k@yahoo.com.au>
To: kvm@vger.kernel.org
Subject: Shared IRQ with PCI Passthrough?
Date: Sat, 13 Aug 2011 15:04:34 +1000	[thread overview]
Message-ID: <j250l3$u5m$1@dough.gmane.org> (raw)

Hi,

back in Dec 2010 Jan Kiszka posted a number of patches that deal with 
IRQ sharing.

[PATCH 0/5] pci-assign: Host IRQ sharing suppport + some fixes and cleanups
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/64601

[PATCH v3 0/4] KVM & genirq: Enable adaptive IRQ sharing for 
passed-through devices
http://thread.gmane.org/gmane.linux.kernel/1076440

[PATCH 0/2] Small KVM device assignment cleanups
http://thread.gmane.org/gmane.comp.emulators.kvm.devel/64515

What do I need to do to apply these patches to my system?

The server I'm working on is running Proxmox 1.8 with upgraded 
2.6.35-1-pve kernel (previously 2.6.32-4-pve) and qemu-kvm 0.14.1.

Do I need to upgrade to a newer kernel, or upgrade qemu-kvm (e.g. 
0.15.0), or both?

The problem that I'm hoping to solve is an IRQ conflict. The Intel 
DQ67SW motherboard only has 1 PCI slot and no BIOS support for assigning 
IRQs. KVM PCI passthrough only works with the nousb kernel parameter, 
otherwise the ehci_hcd:usb1 conflicts with the PCI's assigned IRQ 16. 
This is a problem because I also need to USB passthrough a dongle 
required by the software (in WinXP guest).

Thanks for any pointers,

Mick


             reply	other threads:[~2011-08-13  5:10 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-13  5:04 Michael Sturm [this message]
2011-08-18 14:02 ` Shared IRQ with PCI Passthrough? Gardziejczyk, Kamil
2011-08-23 12:52   ` Michael Sturm
2011-08-23 13:07     ` Jan Kiszka
2012-10-15  9:07       ` Marco
2012-10-15 10:27         ` Jan Kiszka
2012-10-18 20:09           ` Marco
2012-10-19  7:12             ` Veruca Salt

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