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Date: Tue, 10 Jun 2014 13:47:09 -0700
From: Stephen Hemminger <stephen@networkplumber.org>
To: "Carew, Alan" <alan.carew@intel.com>
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Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH 00/10] igb_uio patches
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On Tue, 10 Jun 2014 19:26:08 +0000
"Carew, Alan" <alan.carew@intel.com> wrote:

> One alternative for us is then to take Neil Horman's idea of scanning /sys/bus/pci/devices/<D:B:D.F>/msi_irqs/
> This gives us at least (MSI | MSI-X) | INT-X, however the Virtio specification mentions MSI-X explicitly for determining the correct offset and might not address the underlying problem my patch set was addressing, I have not tried Virtio with MSI.

MSI doesn't work with virtio. pci_enable_msi() returns error. The device
does not report MSI capability.