HP Gen9 做万兆网卡直通时报错：Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor.

1、vi /etc/grub2.cnf

在内核那一行添加”intel_iommu=on“

重启后检查：cat /proc/cmdline | grep iommu

2、dmesg|grep -e DMAR -e IOMMU

报错：vfio-pci 0000:04:00.3: Device is ineligible for IOMMU domain attach due to platform RMRR requirement.  Contact your platform vendor.

3、根据报错在hp论坛查找到该错误信息

https://support.hpe.com/hpsc/doc/public/display?sp4ts.oid=7271259&docId=emr_na-c04781229&docLocale=en_US

https://community.hpe.com/t5/ProLiant-Servers-ML-DL-SL/Device-is-ineligible-for-IOMMU-domain-attach-due-to-platform/td-p/6751904

通过lspci -vvv | grep Ethernet可以查看到网卡的具体型号

解决方案：

4、发现没有Disable HP Shared Memory features这一项，经询问惠普后知道要更新bios固件和ixgbe固件

https://support.hpe.com/hpsc/swd/public/detail?sp4ts.oid=5283363&swItemId=MTX_bde4ae8828c94863924ce295fd&swEnvOid=4184#tab3

https://support.hpe.com/hpesc/public/home/driverHome?pmasr=0&sp4ts.oid=5283363

下载的驱动程序：kmod-hp-ixgbe-5.3.5.1-5.rhel7u4.x86_64.rpm/firmware-nic-intel-1.15.9-1.1.x86_64.rpm

查看网卡类型：ethtool -i ens3f0

查看网卡驱动信息：modinfo ixgbe

也可以自己在intel官网下载ixgbe驱动更新。参考：https://www.cnblogs.com/mulinux/p/9354478.html