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KVM: arm64: nv: Expose hardware access flag management to NV guests

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Everything is in place to update the access flag at S1 and S2. Expose
support for the access flag flavor of FEAT_HAFDBS to NV guests.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Tested-by: Marc Zyngier <maz@kernel.org>
Link: https://msgid.link/20251124190158.177318-15-oupton@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
This commit is contained in:
Oliver Upton 2025-11-24 11:01:56 -08:00
parent e4c7dfac2f
commit d5bbb76f44
1 changed files with 4 additions and 2 deletions
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6
arch/arm64/kvm/nested.c
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@ -1599,11 +1599,13 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val)
case SYS_ID_AA64MMFR1_EL1:
val &= ~(ID_AA64MMFR1_EL1_CMOW |
ID_AA64MMFR1_EL1_nTLBPA |
ID_AA64MMFR1_EL1_ETS |
ID_AA64MMFR1_EL1_HAFDBS);
ID_AA64MMFR1_EL1_ETS);
/* FEAT_E2H0 implies no VHE */
if (test_bit(KVM_ARM_VCPU_HAS_EL2_E2H0, kvm->arch.vcpu_features))
val &= ~ID_AA64MMFR1_EL1_VH;
val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64MMFR1_EL1, HAFDBS, AF);
break;
case SYS_ID_AA64MMFR2_EL1: