Re: [PATCH 2/5] xen/livepatch: search for symbols in all loaded payloads

[Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>]

On Thu, Nov 30, 2023 at 2:30 PM Roger Pau Monne <roger.pau@xxxxxxxxxx> wrote:
>
> When checking if an address belongs to a patch, or when resolving a symbol,
> take into account all loaded livepatch payloads, even if not applied.
>
> This is required in order for the pre-apply and post-revert hooks to work
> properly, or else Xen won't detect the intruction pointer belonging to those
> hooks as being part of the currently active text.
>
> Move the RCU handling to be used for payload_list instead of applied_list, as
> now the calls from trap code will iterate over the payload_list.
>
> Fixes: 8313c864fa95 ('livepatch: Implement pre-|post- apply|revert hooks')
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

Reviewed-by: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>