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Re: [PATCH 2/3] x86/spec-ctrl: Make svm_vmexit_spec_ctrl conditional
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 19 Jul 2022 08:16:34 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Tue, 19 Jul 2022 06:16:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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" here?
> This removes one WRMSR from the VMExit path by default on Zen2 systems.
>
> Fixes: 614cec7d79d7 ("x86/svm: VMEntry/Exit logic for MSR_SPEC_CTRL")
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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