linux-kernel - Re: [PATCH 00/33] arm_mpam: Add basic mpam driver

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Message-ID: <753f4d26-efa9-4ffd-a820-7c2a53c0bc5f@arm.com>
Date: Tue, 18 Nov 2025 14:11:31 +0000
From: Ben Horgan <ben.horgan@....com>
To: Drew Fustini <fustini@...nel.org>
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Subject: Re: [PATCH 00/33] arm_mpam: Add basic mpam driver

Hi Drew,

On 11/16/25 17:16, Drew Fustini wrote:
> On Fri, Nov 07, 2025 at 12:34:17PM +0000, Ben Horgan wrote:
>> Hi all,
> [snip]
>> The rest of the driver can be found here: (no updated version - based on v3)
>> https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/snapshot/v6.18-rc1
> 
> Does anyone know of a hosting platform that offers ARM machines that
> have MPAM?

As far as I know there aren't any.

There is some MPAM support in the Orion Radxa board which is likely the
cheapest option. The MPAM acpi table isn't in the firmware though so
you'd need to load a custom table. James has this working.

> 
> I see there are Ampere systems on Oracle but I wasn't sure if those have
> MPAM.
> 
> I'm getting a RISC-V QoS patch series ready (Ssqosid ext and CBQRI spec)
> and I'd like to get a better understanding of how resctrl works on MPAM
> in practice.
> 
> Thanks,
> Drew


Thanks,

Ben