Why does Red Hat and Fedora software not distinguish between AMD and Intel kernels?

[James Harrison]

Hello,
I remember the times when Redhat software releases (6.2, 7.3, 8, 9) had a specific kernel for AMD and Intel CPUs.

Now forward on to present day and Red Hat software has one kernel build for AMD and Intel CPUs. When was the decision to switch to an all in one encompassing kernel and is there a performance hit. What allows us to have one kernel build for two different CPUs? 

The reason I ask these questions is that Ubuntu is still distinguishing between AMD and Intel CPUs. Why, and what is the difference between what they do and what Red Hat do to their Kernel compiles.


Personally, I think that what Red Hat are doing makes maintaining kernels easier. There is a layer of abstraction that hides what the underlying technology is.


Hope someone can spread some light.

Thanks,
James Harrison