Re: [RFC PATCH 0/3] Suggestions for cache scalar controls

[Drew Fustini <fustini@kernel.org>]

On Mon, Sep 21, 2026 at 02:56:59PM +0100, Ben Horgan wrote:
> Hi Reinette,
> 
> I'm posting as a reply to your series to try and keep things together.
> These patches should just be taken as suggestions. The first two
> patches make the printing of the schema name simpler while keeping it
> out of the arch code. The last add support for scalar cache controls
> in the size file. I found these sufficient to add support for CMIN/CMAX
> on top of MPAM. I'll post these separately but if makes sense to you
> feel free to incorporate them in your PoC.

Thanks for posting as these help RISC-V too. CBQRI has minimum reserved
bandwidth and a shared bw weight but there is no throttle-based MB
control. This should fix the "Invalid MB value" for CBQRI.

I'll rebase the CBQRI support onto resctrl/controls_rfc_v2 and will try
these patches in Qemu. The CMIN/CMAX modelling on your branch is helpful
for CBQRI scalar controls.

Thanks,
Drew