udevProcessPCI() seems to be the libvirt function that is meant to
collect data for a single PCI node. It calls
udevTranslatePCIIds(pci_dev->vendor,
pci_dev->product,
&pci_dev->vendor_name,
&pci_dev->product_name);
Which calls pci_get_strings() comes from the libpciaccess library.
Both with udev_device_get_property_value() from libudev and
pci_lookup_name() from libpci I was able to read the vendor name and the
product name. But I was out of luck with pci_get_strings() from
libpciaccess.
Adding debug output to the libpciaccess library yielded:
gzopen failed: /usr/share/${prefix}/share/misc/pci.ids.gz: No such file or
directory
gzopen failed: /usr/share/${prefix}/share/misc/pci.ids: No such file or
directory
The following change to libpciaccess resolved the issue in my test
program:
diff --git a/debian/rules b/debian/rules
index 47934ec..d393288 100755
--- a/debian/rules
+++ b/debian/rules
@@ -8,8 +8,7 @@ PACKAGE = libpciaccess0
override_dh_auto_configure:
dh_auto_configure -- \
-Ddefault_library=both \
- -Dpci-ids=\$${prefix}/share/misc \
- -Dzlib=enabled
+ -Dpci-ids=/usr/share/misc
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https://bugs.launchpad.net/bugs/2145797
Title:
[Ubuntu26.04] PCI device descriptions missing in virt-manager
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