Re: [PATCH 2/3] x86/spec-ctrl: Make svm_vmexit_spec_ctrl conditional

2022-07-18 Thread Jan Beulich
On 18.07.2022 22:50, Andrew Cooper wrote: > The logic was written this way out of an abundance of caution, but the reality > is that AMD parts don't currently have the RAS-flushing side effect, and nor > do they intend to gain it. Nit: Looks like there's a stray (leftover from a re-write) "and" he

[PATCH 2/3] x86/spec-ctrl: Make svm_vmexit_spec_ctrl conditional

2022-07-18 Thread Andrew Cooper
The logic was written this way out of an abundance of caution, but the reality is that AMD parts don't currently have the RAS-flushing side effect, and nor do they intend to gain it. This removes one WRMSR from the VMExit path by default on Zen2 systems. Fixes: 614cec7d79d7 ("x86/svm: VMEntry/Exi