[PATCH v4 07/15] KVM: arm64: Keep mdcr_el2's value as set by __init_el2_debug

[Fuad Tabba]

__init_el2_debug configures mdcr_el2 at initialization based on,
among other things, available hardware support. Trap deactivation
doesn't check that, so keep the initial value.

No functional change intended. However, the value of mdcr_el2
might be different after deactivating traps than it was before
this patch.

Signed-off-by: Fuad Tabba <tabba at google.com>
---
 arch/arm64/kvm/hyp/nvhe/switch.c | 4 ----
 arch/arm64/kvm/hyp/vhe/switch.c  | 4 ----
 2 files changed, 8 deletions(-)

diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 2ea764a48958..1778593a08a9 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -90,10 +90,6 @@ static void __deactivate_traps(struct kvm_vcpu *vcpu)
 		isb();
 	}
 
-	vcpu->arch.mdcr_el2_host &= MDCR_EL2_HPMN_MASK |
-				    MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT |
-				    MDCR_EL2_E2TB_MASK << MDCR_EL2_E2TB_SHIFT;
-
 	__deactivate_traps_common(vcpu);
 
 	write_sysreg(this_cpu_ptr(&kvm_init_params)->hcr_el2, hcr_el2);
diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c
index ec158fa41ae6..0d0c9550fb08 100644
--- a/arch/arm64/kvm/hyp/vhe/switch.c
+++ b/arch/arm64/kvm/hyp/vhe/switch.c
@@ -93,10 +93,6 @@ void activate_traps_vhe_load(struct kvm_vcpu *vcpu)
 
 void deactivate_traps_vhe_put(struct kvm_vcpu *vcpu)
 {
-	vcpu->arch.mdcr_el2_host &= MDCR_EL2_HPMN_MASK |
-				    MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT |
-				    MDCR_EL2_TPMS;
-
 	__deactivate_traps_common(vcpu);
 }
 
-- 
2.33.0.rc1.237.g0d66db33f3-goog