Modifying The Grub Configuration File - Huawei IN200 User Manual

Huawei IN200 NIC
User Guide
Figure 3-9 Intel(R) TV for Directed I/O (TV-d) screen
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3.1.2 Modifying the GRUB Configuration File

Depending on the Linux distributions, the system Grand Unified Boot Loader (GRUB)
configuration file may be grub.conf or grub.cfg.
This section describes how to configure the iommu and intel_iommu parameters in the SR-
IOV pass-through mode.
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Procedure
This section uses RHEL 7.4 as an example to describe how to modify the system GRUB
configuration file.
Step 1 Run the following command to check whether SR-IOV is enabled:
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Step 2 In the system, run the find command to search for the GRUB file.
Issue 06 (2019-07-27)
To enable SR-IOV in the kernel, add intel_iommu=on to the GRUB file.
To avoid memory mapping and performance problems on the host, add iommu=pt to the
GRUB file when SR-IOV is enabled.
If yes, no further action is required.
If no, go to Step 2.
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