[PATCH v2 15/36] KVM: arm64: gic-v5: Implement GICv5 load/put and save/restore

[Jonathan Cameron]

On Fri, 19 Dec 2025 15:52:41 +0000
Sascha Bischoff <Sascha.Bischoff at arm.com> wrote:

> This change introduces GICv5 load/put. Additionally, it plumbs in
> save/restore for:
> 
> * PPIs (ICH_PPI_x_EL2 regs)
> * ICH_VMCR_EL2
> * ICH_APR_EL2
> * ICC_ICSR_EL1
> 
> A GICv5-specific enable bit is added to struct vgic_vmcr as this
> differs from previous GICs. On GICv5-native systems, the VMCR only
> contains the enable bit (driven by the guest via ICC_CR0_EL1.EN) and
> the priority mask (PCR).
> 
> A struct gicv5_vpe is also introduced. This currently only contains a
> single field - bool resident - which is used to track if a VPE is
> currently running or not, and is used to avoid a case of double load
> or double put on the WFI path for a vCPU. This struct will be extended
> as additional GICv5 support is merged, specifically for VPE doorbells.
> 
> Co-authored-by: Timothy Hayes <timothy.hayes at arm.com>
> Signed-off-by: Timothy Hayes <timothy.hayes at arm.com>
> Signed-off-by: Sascha Bischoff <sascha.bischoff at arm.com>


> diff --git a/arch/arm64/kvm/vgic/vgic-v5.c b/arch/arm64/kvm/vgic/vgic-v5.c
> index 1fe1790f1f874..168447ee3fbed 100644
> --- a/arch/arm64/kvm/vgic/vgic-v5.c
> +++ b/arch/arm64/kvm/vgic/vgic-v5.c
> @@ -1,4 +1,7 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Copyright (C) 2025 Arm Ltd.
> + */

Why in this patch?  It's trivial enough that maybe it doesn't need to be
on it's own, but the first patch touching this file seems like a more
logical place to find it.