From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.linux.dev
Cc: Marc Zyngier <maz@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Jinqian Yang <yangjinqian1@huawei.com>,
Oliver Upton <oliver.upton@linux.dev>
Subject: [PATCH 09/11] KVM: arm64: nv: Advertise FEAT_SpecSEI to NV-enabled VMs
Date: Fri, 12 Sep 2025 14:22:56 -0700 [thread overview]
Message-ID: <20250912212258.407350-10-oliver.upton@linux.dev> (raw)
In-Reply-To: <20250912212258.407350-1-oliver.upton@linux.dev>
FEAT_SpecSEI is an informational feature describing whether speculative
loads may generate SErrors. Since there are already cases where KVM
reinjects an SError into the VM it is already possible this may happen
due to a speculative load within the VM.
Stop hiding the feature from NV-enabled VMs.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
arch/arm64/kvm/nested.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index a5e1a3de2742..d3186f656d83 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -1529,7 +1529,6 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val)
ID_AA64MMFR1_EL1_nTLBPA |
ID_AA64MMFR1_EL1_ETS |
ID_AA64MMFR1_EL1_XNX |
- ID_AA64MMFR1_EL1_SpecSEI |
ID_AA64MMFR1_EL1_HAFDBS);
/* FEAT_E2H0 implies no VHE */
if (test_bit(KVM_ARM_VCPU_HAS_EL2_E2H0, kvm->arch.vcpu_features))
--
2.39.5
next prev parent reply other threads:[~2025-09-12 21:23 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-12 21:22 [PATCH 00/11] KVM: arm64: nv: Align feature limitations with current state of support Oliver Upton
2025-09-12 21:22 ` [PATCH 01/11] KVM: arm64: nv: Convert masks to denylists in limit_nv_id_reg() Oliver Upton
2025-09-12 21:22 ` [PATCH 02/11] KVM: arm64: nv: Don't erroneously claim FEAT_DoubleLock for NV VMs Oliver Upton
2025-09-12 21:22 ` [PATCH 03/11] KVM: arm64: nv: Expose FEAT_DF2 to NV-enabled VMs Oliver Upton
2025-09-12 21:22 ` [PATCH 04/11] KVM: arm64: nv: Expose FEAT_RASv1p1 via RAS_frac Oliver Upton
2025-09-12 21:22 ` [PATCH 05/11] KVM: arm64: nv: Expose FEAT_ECBHB to NV-enabled VMs Oliver Upton
2025-09-12 21:22 ` [PATCH 06/11] KVM: arm64: nv: Expose FEAT_AFP " Oliver Upton
2025-09-12 21:22 ` [PATCH 07/11] KVM: arm64: nv: Exclude guest's TWED configuration when TWE isn't set Oliver Upton
2025-09-12 21:22 ` [PATCH 08/11] KVM: arm64: nv: Expose FEAT_TWED to NV-enabled VMs Oliver Upton
2025-09-12 21:22 ` Oliver Upton [this message]
2025-09-12 21:22 ` [PATCH 10/11] KVM: arm64: nv: Advertise FEAT_TIDCP1 " Oliver Upton
2025-09-12 21:22 ` [PATCH 11/11] KVM: arm64: nv: Expose up to FEAT_Debugv8p8 " Oliver Upton
2025-09-12 21:43 ` [PATCH 00/11] KVM: arm64: nv: Align feature limitations with current state of support Marc Zyngier
2025-09-12 21:48 ` Oliver Upton
2025-09-19 13:15 ` Marc Zyngier
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