Re: [PATCH v3 26/47] arm_mpam: resctrl: Wait for cacheinfo to be ready

Ben Horgan
2026-01-13T15:15:50Z

Hi Jonathan,

On 1/13/26 15:01, Jonathan Cameron wrote:
> On Mon, 12 Jan 2026 16:58:53 +0000
> Ben Horgan <ben.horgan@arm.com> wrote:
>
>> In order to calculate the rmid realloc threshold the size of the cache
>> needs to be known. Cache domains will also be named after the cache id. So
>> that this information can be extracted from cacheinfo we need to wait for
>> it to be ready. The cacheinfo information is populated in device_initcall()
>> so we wait for that.
>>
>> Signed-off-by: James Morse <james.morse@arm.com>
>> [horgan: split out from another patch]
>> Signed-off-by: Ben Horgan <ben.horgan@arm.com>
>> ---
>> This is moved into it's own patch to allow all uses of cacheinfo to be
>> valid when they are introduced.
>
> I don't mind the patch but I'm not entirely following this comment. Is
> the point that previously there was a sneaky user before this was added in
> the series?

Yes, arm_mpam: resctrl: Add support for 'MB' resource, accesses
cacheinfo so wanted to order this patch before that.

>
> Anyhow, that's not in the patch itself so
> Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>

Thanks,

Ben