linux-kernel - Re: [PATCH v7 24/45] KVM: arm64: Handle Realm PSCI requests

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Message-ID: <5008db08-c153-48c0-90b3-39fa0297ba1e@redhat.com>
Date: Tue, 4 Mar 2025 15:38:27 +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>
Subject: Re: [PATCH v7 24/45] KVM: arm64: Handle Realm PSCI requests

On 2/14/25 2:14 AM, Steven Price wrote:
> The RMM needs to be informed of the target REC when a PSCI call is made
> with an MPIDR argument. Expose an ioctl to the userspace in case the PSCI
> is handled by it.
> 
> Co-developed-by: Suzuki K Poulose <suzuki.poulose@....com>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> Signed-off-by: Steven Price <steven.price@....com>
> ---
> Changes since v6:
>   * Use vcpu_is_rec() rather than kvm_is_realm(vcpu->kvm).
>   * Minor renaming/formatting fixes.
> ---
>   arch/arm64/include/asm/kvm_rme.h |  3 +++
>   arch/arm64/kvm/arm.c             | 25 +++++++++++++++++++++++++
>   arch/arm64/kvm/psci.c            | 30 ++++++++++++++++++++++++++++++
>   arch/arm64/kvm/rme.c             | 14 ++++++++++++++
>   4 files changed, 72 insertions(+)
> 

Reviewed-by: Gavin Shan <gshan@...hat.com>