/proc/cpuinfo Will No Longer Show AMD SVM When It's Been Disabled By The BIOS

The x86/cpu changes for the Linux 6.7 kernel have been merged and is highlighted by a small but useful change for propagating of the AMD SVM virtualization feature flag to /proc/cpuinfo.

On Intel systems when virtualization is enabled it can be easily checked via the CPU feature flags in /proc/cpuinfo. It's that way to for AMD SVM, but that when virtualization is disabled in the system BIOS, it's still shown the "svm" feature flag in the output. So for those looking at /proc/cpuinfo to determine the SVM state it hasn't necessarily been accurate -- same goes for programs/scripts checking on /proc/cpuinfo flags. But beginning with Linux 6.7, that has been fixed up.

Moving forward the SVM feature flag will be properly cleared when SVM virtualization is disabled from the system BIOS. The same goes as well for the Zen-based Hygon systems. It's a small but useful change/fix for being able to easily and more readily determine if AMD SVM is actually ready for use.

That was the main change of the x86/cpu pull request that was pulled overnight to mainline.