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Re: [PATCH] x86/mm: Remove unnecessary mfn_valid() call from get_page_from_l1e()
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 27 Apr 2022 16:07:32 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 27 Apr 2022 14:07:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 27.04.2022 16:04, Andrew Cooper wrote:
> mfn_valid() is not a trivially simple, and contains an evaluate_nospec() for
> speculative defence. Avoid calling it redundantly, and just store the result
> of the first call.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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