• If IOMMU is disabled in BIOS, this isn't needed
• iommu=off should not be used (source)

sudo grubby --update-kernel='ALL' --args='iommu=pt'

iommu=pt

• This may need adjusted for different CPU core counts
• Using 8 when SMT is disabled with a 2700X does not work as-expected ¹⁾

sudo grubby --args='nvme.poll_queues=16' --update-kernel='ALL'

nvme.poll_queues=16

dmesg | grep 'nvme'

cat '/proc/interrupts'

• TODO: Find information about this

sudo grubby --update-kernel='ALL' --args='nvidia.NVreg_UsePageAttributeTable=1'

nvidia.NVreg_UsePageAttributeTable=1

• https://us.download.nvidia.com/XFree86/Linux-x86_64/515.65.01/README/gsp.html
• Allows loading of GSP firmware
• This doesn't appear necessary for the open kernel module
• 2022/07/20 515.57: this causes AoE2:DE to crash GNOME on-startup
• 2022/07/20 515.57: This doesn't appear beneficial

sudo grubby --update-kernel='ALL' --args='nvidia.NVreg_EnableGpuFirmware=1'

nvidia.NVreg_EnableGpuFirmware=1'

nvidia-smi -q | grep 'GSP'

• Allows use of Overdrive options for overclocking and increasing the Power Limit

sudo grubby --args='amdgpu.ppfeaturemask=0xffffffff' --update-kernel='ALL'

amdgpu.ppfeaturemask=0xffffffff

cat '/sys/module/amdgpu/parameters/ppfeaturemask' | grep '0xffffffff'

• This is needed to relax permissions for Coreboot firmware to be flashed internally
• This should be removed after flashing

sudo grubby --update-kernel='ALL' --args='iomem=relaxed'

iomem=relaxed