Re: [PATCH v16 22/45] KVM: arm64: CCA: Handle RMI_EXIT_RIPAS_CHANGE

From: Marc Zyngier

Date: Mon Sep 07 2026 - 06:18:49 EST


On Mon, 07 Sep 2026 06:05:29 +0100,
Kohei Enju <enju.kohei@xxxxxxxxxxx> wrote:

[...]

> Although the root cause is an RMM bug, should we also guard RIPAS_SET
> against this no-progress case?

No. We really should *prevent* the kernel from using a known broken
RMM. Which brings me to one of my long standing request: how to we
enforce the minimum version of RMM that KVM is willing to work with?

We absolutely need to have a hard deprecation mechanism in place
before day-1.

M.

--
Without deviation from the norm, progress is not possible.