Intel Skylake/Kaby Lake processors: broken hyper-threading

Henrique de Moraes Holschuh has posted an advisory about a processor/microcodedefect recently identified on Intel Skylake and Intel Kaby Lake processorswith hyper-threading enabled. "TL;DR: unfixed Skylake and Kaby Lakeprocessors could, in some situations, dangerously misbehave whenhyper-threading is enabled. Disable hyper-threading immediately inBIOS/UEFI to work around the problem. Read this advisory for instructionsabout an Intel-provided fix."