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| author |   Christoffer Dall <christoffer.dall@linaro.org> | 2017-10-10 13:25:21 +0200 |
|---|---|---|
| committer |   Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 10:53:13 +0000 |
| commit | 34f8cdf1dfc218ba36b95bcc4e0d85ea42bba9fc (patch) | |
| tree | 9921854c41aea634736ef43f07d86ec1acb56ac2 /arch/arm64/kvm | |
| parent | KVM: arm64: Remove kern_hyp_va() use in VHE switch function (diff) | |
| download | linux-dev-34f8cdf1dfc218ba36b95bcc4e0d85ea42bba9fc.tar.xz linux-dev-34f8cdf1dfc218ba36b95bcc4e0d85ea42bba9fc.zip | |
KVM: arm64: Don't deactivate VM on VHE systems
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>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/hyp/switch.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 1e26a81c0a16..9ffd802e775d 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -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); |