My CPU is Intel(R) Xeon(R) Gold 6438N, and I wish to use Intel® Knowledge Streaming Accelerator (DSA).

I set my configuration by Person Information. One of many steps requires setting  CONFIG_INTEL_IOMMU_DEFAULT_ON or the CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON.

I take advantage of command “cat /boot/config-$(uname -r) | grep CONFIG_INTEL_IOMMU “, which reveals:

 so I checked the knowledge and did the next operations：

1. sudo vim /and many others/default/grub

and I added intel_iommu=on,sm_on into the top of line GRUB_CMDLINE_LINUX_DEFAULT

2. sudo update-grub

3. now I take advantage of command:  cat /proc/cmdline

it reveals:
BOOT_IMAGE=/boot/vmlinuz-6.5.0-27-generic root=UUID=4fa8d2bb-7f5b-4d02-90d6-1a40cfed0e84 ro quiet splash intel_iommu=on,sm_on vt.handoff=7

4. I reboot the machine
Now the issue is: the results of cat /boot/config-$(uname -r) | grep CONFIG_INTEL_IOMMU does not change, it is nonetheless the identical.
What can I do to set the CONFIG_INTEL_IOMMU_DEFAULT_ON and CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON equal y because the Person Information mentioned.

I hope to get a reply as quickly as attainable, I can be grateful !