Re: [PATCH v1 02/31] x86/resctrl: Add a helper to avoid reaching into the arch code resource list

Reinette Chatre
2024-04-09T03:14:04Z

Hi James,

On 3/21/2024 9:50 AM, James Morse wrote:
> Resctrl occasionally wants to know something about a specific resource,
> in these cases it reaches into the arch code's rdt_resources_all[]
> array.
>
> Once the filesystem parts of resctrl are moved to /fs/, this means it
> will need visibility of the architecture specific struct
> resctrl_hw_resource definition, and the array of all resources.

rdt_hw_resource?

> All architectures would also need a r_resctrl member in this struct.
>
> Instead, abstract this via a helper to allow architectures to do
> different things here. Move the level enum to the resctrl header and
> add a helper to retrieve the struct rdt_resource by 'rid'.
>
> resctrl_arch_get_resource() should not return NULL for any value in
> the enum, it may instead return a dummy resource that is
> !alloc_enabled && !mon_enabled.
>
> Signed-off-by: James Morse <james.morse@arm.com>
> ---

Patch looks good to me.

Reinette