[libvirt] [PATCH] qemu: Explain why mdevs are assumed to be PCI Express
Signed-off-by: Andrea Bolognani <abologna(a)redhat.com>
---
src/qemu/qemu_domain_address.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 2106b34..b5b863f 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -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;
--
2.7.5