From: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
To: Marc Zyngier <maz@kernel.org>,
kvmarm@lists.linux.dev, kvm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Cc: Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Zenghui Yu <yuzenghui@huawei.com>,
Eric Auger <eric.auger@redhat.com>
Subject: Re: [PATCH 01/14] arm64: cpufeature: Handle NV_frac as a synonym of NV2
Date: Mon, 24 Feb 2025 13:11:18 +0530 [thread overview]
Message-ID: <yq5a7c5fhjs1.fsf@kernel.org> (raw)
In-Reply-To: <20250215173816.3767330-2-maz@kernel.org>
Marc Zyngier <maz@kernel.org> writes:
> With ARMv9.5, an implementation supporting Nested Virtualization
> is allowed to only support NV2, and to avoid supporting the old
> (and useless) ARMv8.3 variant.
>
> This is indicated by ID_AA64MMFR2_EL1.NV being 0 (as if NV wasn't
> implemented) and ID_AA64MMDR4_EL1.NV_frac being 1 (indicating that
^ F
The register name is wrong there.
> NV2 is actually supported).
>
-aneesh
next prev parent reply other threads:[~2025-02-24 7:44 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-15 17:38 [PATCH 00/14] KVM: arm64: NV userspace ABI Marc Zyngier
2025-02-15 17:38 ` [PATCH 01/14] arm64: cpufeature: Handle NV_frac as a synonym of NV2 Marc Zyngier
2025-02-24 7:41 ` Aneesh Kumar K.V [this message]
2025-02-24 8:26 ` Marc Zyngier
2025-02-15 17:38 ` [PATCH 02/14] KVM: arm64: Hide ID_AA64MMFR2_EL1.NV from guest and userspace Marc Zyngier
2025-02-15 17:38 ` [PATCH 03/14] KVM: arm64: Mark HCR.EL2.E2H RES0 when ID_AA64MMFR1_EL1.VH is zero Marc Zyngier
2025-02-24 7:39 ` Aneesh Kumar K.V
2025-02-24 8:32 ` Marc Zyngier
2025-02-15 17:38 ` [PATCH 04/14] KVM: arm64: Mark HCR.EL2.{NV*,AT} RES0 when ID_AA64MMFR4_EL1.NV_frac is 0 Marc Zyngier
2025-02-15 17:38 ` [PATCH 05/14] KVM: arm64: Advertise NV2 in the boot messages Marc Zyngier
2025-02-15 17:38 ` [PATCH 06/14] KVM: arm64: Consolidate idreg reset method Marc Zyngier
2025-02-15 17:38 ` [PATCH 07/14] KVM: arm64: Make ID_REG_LIMIT_FIELD_ENUM() more widely available Marc Zyngier
2025-02-15 17:38 ` [PATCH 08/14] KVM: arm64: Enforce NV limits on a per-idregs basis Marc Zyngier
2025-02-15 17:38 ` [PATCH 09/14] KVM: arm64: Move NV-specific capping to idreg sanitisation Marc Zyngier
2025-02-15 17:38 ` [PATCH 10/14] KVM: arm64: Allow userspace to limit NV support to nVHE Marc Zyngier
2025-02-15 17:38 ` [PATCH 11/14] KVM: arm64: Make ID_AA64MMFR4_EL1.NV_frac writable Marc Zyngier
2025-02-15 17:38 ` [PATCH 12/14] KVM: arm64: Advertise FEAT_ECV when possible Marc Zyngier
2025-02-15 17:38 ` [PATCH 13/14] KVM: arm64: Allow userspace to request KVM_ARM_VCPU_EL2* Marc Zyngier
2025-02-19 23:19 ` Oliver Upton
2025-02-15 17:38 ` [PATCH 14/14] KVM: arm64: Document NV caps and vcpu flags Marc Zyngier
2025-02-19 23:19 ` Oliver Upton
2025-02-19 23:17 ` [PATCH 00/14] KVM: arm64: NV userspace ABI Oliver Upton
2025-02-20 13:07 ` Marc Zyngier
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