Re: [PATCH v7 4/4] xen/riscv: rework the A/D bits comment in p2m_set_pte_flags()

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

On 10/16/26 5:34 PM, Baptiste Le Duc wrote:
> The comment in p2m_set_pte_flags() quotes the spec at length to describe
> the two A/D bits schemes, and its TODO mixes two things: why A/D are preset
> today (OpenSBI delegates the resulting page faults to a lower privilege
> mode, so Xen would take them with no handler) and what remains to be done.
>
> Summarize the two schemes as a short list. The reason for presetting A/D is
> not future work, so move it out of the TODO, next to the schemes. The TODO
> now keeps only the later work, handling these page faults instead of
> presetting A/D, which only concerns Svade as A/D page faults cannot happen
> otherwise.
>
> Also note that presetting the A/D bits is harmless when the device
> tree advertises both Svade and Svadu and the platform uses hardware
> A/D updating.
>
> No functional change.
>
> Assisted-by: Claude:claude-opus-5-5
> Signed-off-by: Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>
LGTM:
 Reviewed-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>

Thanks!

~ Oleksii