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KVM: arm64: Don't deactivate VM on VHE systems

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There is no need to reset the VTTBR to zero when exiting the guest on
VHE systems.  VHE systems don't use stage 2 translations for the EL2&0
translation regime used by the host.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Christoffer Dall 2017-10-10 13:25:21 +02:00 committed by Marc Zyngier
parent 86d05682b4
commit 34f8cdf1df
1 changed files with 3 additions and 5 deletions
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8
arch/arm64/kvm/hyp/switch.c
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@ -156,9 +156,8 @@ static void __hyp_text __deactivate_traps(struct kvm_vcpu *vcpu)
write_sysreg(0, pmuserenr_el0);
}
static void __hyp_text __activate_vm(struct kvm_vcpu *vcpu)
static void __hyp_text __activate_vm(struct kvm *kvm)
{
struct kvm *kvm = kern_hyp_va(vcpu->kvm);
write_sysreg(kvm->arch.vttbr, vttbr_el2);
}
@ -377,7 +376,7 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu)
__sysreg_save_host_state(host_ctxt);
__activate_traps(vcpu);
__activate_vm(vcpu);
__activate_vm(vcpu->kvm);
__vgic_restore_state(vcpu);
__timer_enable_traps(vcpu);
@ -405,7 +404,6 @@ int kvm_vcpu_run_vhe(struct kvm_vcpu *vcpu)
__vgic_save_state(vcpu);
__deactivate_traps(vcpu);
__deactivate_vm(vcpu);
__sysreg_restore_host_state(host_ctxt);
@ -440,7 +438,7 @@ int __hyp_text __kvm_vcpu_run_nvhe(struct kvm_vcpu *vcpu)
__sysreg_save_host_state(host_ctxt);
__activate_traps(vcpu);
__activate_vm(vcpu);
__activate_vm(kern_hyp_va(vcpu->kvm));
__vgic_restore_state(vcpu);
__timer_enable_traps(vcpu);