Re: [PATCH v2] KVM: arm64: Don't WARN on SMCCC filter reserved range allocation failure

From: Marc Zyngier

Date: Mon Oct 26 2026 - 08:07:00 EST


On Tue, 13 Oct 2026 17:43:34 +0100, Fuad Tabba wrote:
> The first time userspace sets an SMCCC filter, kvm_smccc_set_filter()
> inserts the reserved architecture ranges into the maple tree and WARNs
> if that fails. The insertion allocates with GFP_KERNEL_ACCOUNT, so a
> tight memory cgroup limit is enough for userspace to hit the WARN, even
> though the -ENOMEM is also returned to it. The WARN dates back to when
> the ranges were inserted at VM creation.
>
> [...]

Applied to fixes, thanks!

[1/1] KVM: arm64: Don't WARN on SMCCC filter reserved range allocation failure
commit: 09d5e940500c2e51b697a0522c54132c1ef078ef

Cheers,

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