[PATCH v3 2/4] KVM: arm64: Initialize HCRX_EL2 traps in pKVM

[Fuad Tabba]

Initialize and set the traps controlled by the HCRX_EL2 in pKVM.

Reviewed-by: Marc Zyngier <maz at kernel.org>
Signed-off-by: Fuad Tabba <tabba at google.com>
---
 arch/arm64/kvm/hyp/nvhe/pkvm.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c
index 3927fe52a3dd..6efb9bf56180 100644
--- a/arch/arm64/kvm/hyp/nvhe/pkvm.c
+++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c
@@ -166,8 +166,13 @@ static int pkvm_vcpu_init_traps(struct pkvm_hyp_vcpu *hyp_vcpu)
 
 	pkvm_vcpu_reset_hcr(vcpu);
 
-	if ((!pkvm_hyp_vcpu_is_protected(hyp_vcpu)))
+	if ((!pkvm_hyp_vcpu_is_protected(hyp_vcpu))) {
+		struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu;
+
+		/* Trust the host for non-protected vcpu features. */
+		vcpu->arch.hcrx_el2 = host_vcpu->arch.hcrx_el2;
 		return 0;
+	}
 
 	ret = pkvm_check_pvm_cpu_features(vcpu);
 	if (ret)
@@ -175,6 +180,7 @@ static int pkvm_vcpu_init_traps(struct pkvm_hyp_vcpu *hyp_vcpu)
 
 	pvm_init_traps_hcr(vcpu);
 	pvm_init_traps_mdcr(vcpu);
+	vcpu_set_hcrx(vcpu);
 
 	return 0;
 }
-- 
2.49.0.rc1.451.g8f38331e32-goog