linux-kernel - Re: [PATCH 0/5] KVM: arm64: GICv5 legacy (GCIE

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Message-Id: <175812733344.1632579.17001899303582807634.b4-ty@kernel.org>
Date: Wed, 17 Sep 2025 17:42:21 +0100
From: Marc Zyngier <maz@...nel.org>
To: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org,
	Sascha Bischoff <Sascha.Bischoff@....com>
Cc: nd <nd@....com>,
	oliver.upton@...ux.dev,
	Joey Gouly <Joey.Gouly@....com>,
	Suzuki Poulose <Suzuki.Poulose@....com>,
	yuzenghui@...wei.com,
	will@...nel.org,
	tglx@...utronix.de,
	lpieralisi@...nel.org,
	Timothy Hayes <Timothy.Hayes@....com>
Subject: Re: [PATCH 0/5] KVM: arm64: GICv5 legacy (GCIE_LEGACY) NV enablement and cleanup

On Thu, 28 Aug 2025 10:59:41 +0000, Sascha Bischoff wrote:
> This series enables nested virtualization for GICv3-based VMs on GICv5
> hosts (w/ FEAT_GCIE_LEGACY) in KVM/arm64. In addition, it adds a CPU
> capability to track support for FEAT_GCIE_LEGACY across all CPUs.
> 
> The series fixes ICC_SRE_EL2 access handling for GICv5 hosts (to match
> the updated bet1+ specification [1]), and extends nested
> virtualization support to vGICv3 guests running on compatible GICv5
> systems. With these changes, it becomes possible to run with
> kvm-arm.mode=nested, and these changes have been tested with three
> levels of nesting on simulated hardware (Arm FVP).
> 
> [...]

Applied to next, thanks!

[1/5] KVM: arm64: Allow ICC_SRE_EL2 accesses on a GICv5 host
      (no commit info)
[2/5] KVM: arm64: Enable nested for GICv5 host with FEAT_GCIE_LEGACY
      commit: d5a012af348d4d84287267547eb8637b937545af
[3/5] arm64: cpucaps: Add GICv5 Legacy vCPU interface (GCIE_LEGACY) capability
      commit: 7847f51189343b29a24ca7edafb60a9032d5acf8
[4/5] KVM: arm64: Use ARM64_HAS_GICV5_LEGACY for GICv5 probing
      commit: 754e43b09561f59dd04e0b8aafe4f5c9a71a4d1f
[5/5] irqchip/gic-v5: Drop has_gcie_v3_compat from gic_kvm_info
      commit: 5c5db9efe323dd0b0d7917dbe5b9c0999c95e79e

Cheers,

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