So as far as I understand, if I have the latest AMD microcode on my system, at least on Linux, I don't really have to worry about this anymore?
As a sidenote, any word on Microsoft working on this?
As a sidenote, any word on Microsoft working on this?
If you're running the latest kernel, which automatically sets the chicken bit, you don't have to worry about this.
If you're running fixed microcode, which is only available for Rome, Castle Peak and Mendocino, you don't have to worry about this. Good microcode revisions are:
Rome / Castle Peak: 0x0830107a (published)
Xbox Series X: unknown
Renoir / Grey Hawk: 0x0860010b
Lucienne: 0x08608105
Matisse: 0x08701032
Van Gogh (Steam Deck): unknown
Mendocino: 0x08a00008 (published)
wrmsr -a 0xc0011029 $(($(rdmsr -c 0xc0011029) | (1<<9)))It's not easy to set chicken bit manually either.
In other words windows on AMD Zen2 is fcked.