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KVM: arm64: Fix resetting SVE trap values on reset for hVHE

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Ensure that SVE traps are disabled for hVHE, if the FPSIMD state
isn't owned by the guest, when getting the reset value for the
architectural feature control register.

Fixes: 75c76ab5a6 ("KVM: arm64: Rework CPTR_EL2 programming for HVHE configuration")
Signed-off-by: Fuad Tabba <tabba@google.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230724123829.2929609-8-tabba@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Fuad Tabba 2023-07-24 13:38:28 +01:00 • committed by Oliver Upton
parent a9626099a5
commit 7af0d5e500
1 changed files with 4 additions and 0 deletions
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4
arch/arm64/include/asm/kvm_emulate.h
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@ -588,6 +588,10 @@ static __always_inline u64 kvm_get_reset_cptr_el2(struct kvm_vcpu *vcpu)
CPACR_EL1_ZEN_EL1EN);
} else if (has_hvhe()) {
val = (CPACR_EL1_FPEN_EL0EN | CPACR_EL1_FPEN_EL1EN);
if (!vcpu_has_sve(vcpu) ||
(vcpu->arch.fp_state != FP_STATE_GUEST_OWNED))
val |= CPACR_EL1_ZEN_EL1EN | CPACR_EL1_ZEN_EL0EN;
} else {
val = CPTR_NVHE_EL2_RES1;