Re: [dpdk-dev] [PATCH v6 2/3] security: add option for faster udata or mdata access

[Thomas Monjalon <thomas@monjalon.net>]

15/09/2021 18:30, Nithin Dabilpuram:
> Currently rte_security_set_pkt_metadata() and rte_security_get_userdata()
> methods to set pkt metadata on Inline outbound and get userdata
> after Inline inbound processing is always driver specific callbacks.
> 
> For drivers that do not have much to do in the callbacks but just
> to update metadata in rte_security dynamic field and get userdata
> from rte_security dynamic field, having to just to PMD specific
> callback is costly per packet operation. This patch provides
> a mechanism to do the same in inline function and avoid function
> pointer jump if a driver supports the same.
> 
> Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
> Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
> Acked-by: Akhil Goyal <gakhil@marvell.com>
[...]
> --- a/doc/guides/rel_notes/release_21_08.rst
> +++ b/doc/guides/rel_notes/release_21_08.rst
> @@ -223,6 +223,12 @@ ABI Changes
>  
>  * No ABI change that would break compatibility with 20.11.
>  
> +* security: ``rte_security_set_pkt_metadata`` and ``rte_security_get_userdata``
> +  routines used by Inline outbound and Inline inbound security processing are
> +  made inline and enhanced to do simple 64-bit set/get for PMD's that do not
> +  have much processing in PMD specific callbacks but just 64-bit set/get.
> +  This avoids a per pkt function pointer jump overhead for such PMD's.

Please pay attention it is not the right release notes.