linux-kernel - Re: [PATCH v9 13/43] arm64: RME: Support for the VGIC in realms

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Message-ID: <5930a931-b809-497d-8eb2-076570738ef7@redhat.com>
Date: Tue, 1 Jul 2025 16:41:30 +1000
From: Gavin Shan <gshan@...hat.com>
To: Steven Price <steven.price@....com>, kvm@...r.kernel.org,
 kvmarm@...ts.linux.dev
Cc: Catalin Marinas <catalin.marinas@....com>, Marc Zyngier <maz@...nel.org>,
 Will Deacon <will@...nel.org>, James Morse <james.morse@....com>,
 Oliver Upton <oliver.upton@...ux.dev>,
 Suzuki K Poulose <suzuki.poulose@....com>, Zenghui Yu
 <yuzenghui@...wei.com>, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, Joey Gouly <joey.gouly@....com>,
 Alexandru Elisei <alexandru.elisei@....com>,
 Christoffer Dall <christoffer.dall@....com>, Fuad Tabba <tabba@...gle.com>,
 linux-coco@...ts.linux.dev,
 Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
 Shanker Donthineni <sdonthineni@...dia.com>, Alper Gun
 <alpergun@...gle.com>, "Aneesh Kumar K . V" <aneesh.kumar@...nel.org>,
 Emi Kisanuki <fj0570is@...itsu.com>
Subject: Re: [PATCH v9 13/43] arm64: RME: Support for the VGIC in realms

On 6/11/25 8:48 PM, Steven Price wrote:
> The RMM provides emulation of a VGIC to the realm guest but delegates
> much of the handling to the host. Implement support in KVM for
> saving/restoring state to/from the REC structure.
> 
> Signed-off-by: Steven Price <steven.price@....com>
> ---
> Changes from v8:
>   * Propagate gicv3_hcr to from the RMM.
> Changes from v5:
>   * Handle RMM providing fewer GIC LRs than the hardware supports.
> ---
>   arch/arm64/include/asm/kvm_rme.h |  1 +
>   arch/arm64/kvm/arm.c             | 16 +++++++++--
>   arch/arm64/kvm/rme.c             |  5 ++++
>   arch/arm64/kvm/vgic/vgic-init.c  |  2 +-
>   arch/arm64/kvm/vgic/vgic-v3.c    |  6 +++-
>   arch/arm64/kvm/vgic/vgic.c       | 49 ++++++++++++++++++++++++++++++--
>   6 files changed, 72 insertions(+), 7 deletions(-)
> 
Reviewed-by: Gavin Shan <gshan@...hat.com>