From: Marc Zyngier <maz@kernel.org>
To: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
Cc: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
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 08:26:57 +0000 [thread overview]
Message-ID: <86o6yrrbn2.wl-maz@kernel.org> (raw)
In-Reply-To: <yq5a7c5fhjs1.fsf@kernel.org>
On Mon, 24 Feb 2025 07:41:18 +0000,
Aneesh Kumar K.V <aneesh.kumar@kernel.org> wrote:
>
> 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.
Already reported by Joey on v2 of this series.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2025-02-24 8:44 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
2025-02-24 8:26 ` Marc Zyngier [this message]
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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