Re: arm64: MPAM2_EL2 and MPAMHCR_EL2 are left UNKNOWN under arm64.nompam

From: Xi Ruoyao

Date: Wed Sep 02 2026 - 11:41:52 EST


On Thu, 2026-08-27 at 09:41 +0100, Ben Horgan wrote:
> > not, could the caveat go the other way round: arm64.nompam is for
> > systems where firmware ignores MPAM, and should only be set on a
> > machine that does not boot without it?
>
> Yes, seems fine.

Sorry for the late reply. This is indeed the original purpose for
arm64.nompam, a dirty hack when we have no other ways to make the system
boot. If you think it causes an inconsistent state I'd not complain
against adding a loud warning or something.

--
Xi Ruoyao <xry111@xxxxxxxxxxx>