Intel VMD creates secondary PCIe domain, where child devices in this domain are aggregated behind a single end point. Linux exposes these as special 32-bit domains, and devices in them are not individually assignable. This patch ignores devices in such domains as desired, and prevents logging excessive errors, like: internal error: dev->name buffer overflow: 10000:00:00.0 Cc: Jonathan Derrick <jonathan.derrick(a)intel.com&gt; Signed-off-by: Keith Busch <keith.busch(a)intel.com&gt; --- src/util/virpci.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/util/virpci.c b/src/util/virpci.c index 55e4c3e49..53a6f2e51 100644 --- a/src/util/virpci.c +++ b/src/util/virpci.c @@ -1762,6 +1762,13 @@ virPCIDeviceNew(unsigned int domain, char *vendor = NULL; char *product = NULL; + + /* Devices in a 32-bit domain are special. Currently applicable to Intel + * VMD PCIe, where individual devices are not individually assignable. + */ + if (domain > USHRT_MAX) + return NULL; + if (VIR_ALLOC(dev) < 0) return NULL; -- 2.14.3