From: Sheng Yang <sheng@linux.intel.com>
To: kvm@vger.kernel.org
Cc: Jason Kwon <jkwon@redback.com>, Chris Wright <chrisw@sous-sol.org>
Subject: Re: KVM PCI passthrough IRQ limitations
Date: Wed, 4 Mar 2009 10:35:21 +0800 [thread overview]
Message-ID: <200903041035.21916.sheng@linux.intel.com> (raw)
In-Reply-To: <49ADD64D.4000200@redback.com>
On Wednesday 04 March 2009 09:15:57 Jason Kwon wrote:
> Chris Wright wrote:
> > * Jason Kwon (jkwon@redback.com) wrote:
> >> pci 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> >> IRQ handler type mismatch for IRQ 16
> >> current handler: uhci_hcd:usb3
> >
> > This is a shared interrupt (and pci device assignment will request a
> > non-shared interrupt). Are you using that usb host controller? Can you
> > unbind it?
>
> I attempted unbinding the usb host driver, but the IRQ was/is also
> shared by the SATA drive controller, so I'm stuck. I tried moving the
> card to a different slot but the IRQ assignments were the same.
>
> Does it make any difference whether the device is MSI-capable or not?
If the device support MSI, msi2intx=1(default value) would resolve the sharing
interrupt issue. So seems the device didn't support MSI...
--
regards
Yang, Sheng
prev parent reply other threads:[~2009-03-04 2:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-03 22:15 KVM PCI passthrough IRQ limitations Jason Kwon
2009-03-03 22:36 ` Chris Wright
2009-03-03 23:26 ` Jason Kwon
2009-03-03 23:33 ` Chris Wright
2009-03-04 1:15 ` Jason Kwon
2009-03-04 1:58 ` Chris Wright
2009-03-04 2:35 ` Sheng Yang [this message]
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