Re: [PATCH v2 0/3] KVM: arm64: Fix handling of ID_PFR1_EL1.GIC

[Marc Zyngier <maz@kernel.org>]

On Fri, 07 Nov 2025 10:06:23 +0000,
Suzuki K Poulose <suzuki.poulose@arm.com> wrote:
> 
> Hi Marc
> 
> On 30/10/2025 12:27, Marc Zyngier wrote:
> > Peter reported[0] that restoring a GICv2 VM fails badly, and correctly
> > points out that ID_PFR1_EL1.GIC isn't writable, while its 64bit
> > equivalent is. I broke that in 6.12.
> > 
> > The other thing is that fixing the ID regs at runtime isn't great.
> > specially when we could adjust them at the point where the GIC gets
> > created.
> > 
> > This small series aims at fixing these issues. I've only tagged the
> > first one as a stable candidate. 
> 
> But, all 3 patches have the same Fixes tag, was that intentional ?

Yes. Fixes don't necessarily need backporting, and the latter ones,
while making things less awful, are not absolutely necessary to fix
6.12.

However, I have no doubt that the Artificial Idiots that automatically
backport stuff to stable will pick whatever seems to apply without any
discrimination.

I've stopped fighting that battle.

	M.

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