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qemu: Explain why mdevs are assumed to be PCI Express

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Signed-off-by: Andrea Bolognani <abologna@redhat.com>
This commit is contained in:
Andrea Bolognani 2017-06-12 17:57:31 +08:00
parent adf846d3c9
commit 2feb2fe251
1 changed files with 5 additions and 0 deletions
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5
src/qemu/qemu_domain_address.c
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@ -645,6 +645,11 @@ qemuDomainDeviceCalculatePCIConnectFlags(virDomainDeviceDefPtr dev,
return pcieFlags;
}
/* mdevs don't have corresponding files in /sys that we can poke to
* try and figure out whether they are legacy PCI or PCI Express, so
* the logic below would never work; instead, we just go ahead and
* assume they're PCI Express. This is a very reasonable assumption,
* as all current mdev-capable devices are indeed PCI Express */
if (hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_MDEV)
return pcieFlags;