What is the purpose of MTRR's ioctls from userspace?

[dipto181]

does anyone know what is the purpose of MTRR's ioctl's in the userspace? https://www.kernel.org/doc/html/latest/x86/mtrr.html#creating-mtrrs-from-a-c-programme-using-ioctl-s shows the example shows how to create a specific memory range of a specific memory type. Any Idea if I can bind a virtual address to that specific physical address?