Perhaps not exactly what you are looking for, but there are Smart NIC PCIe cards running Linux (usually for data center applications), see e.g. these links: ht

Perhaps not exactly what you are looking for, but there are Smart NIC PCIe cards running Linux (usually for data center applications), see e.g. these links: https://datatracker.ietf.org/meeting/105/materials/slides-105-tdd-deep-dive-slides https://datatracker.ietf.org/meeting/105/materials/slides-10... https://legacy.netdevconf.info/0x14/pub/slides/39/Netdev%200x14%20--%20Taking%20Control%20of%20your%20SmartNIC%20v1.pdf https://legacy.netdevconf.info/0x14/pub/slides/39/Netdev%200... https://smartnicssummit.com/proceeding_files/a0q5f000000lcIn/20220427_A-101_Zagorianakos.PDF https://smartnicssummit.com/proceeding_files/a0q5f000000lcIn...