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authorChristoffer Dall <cdall@linaro.org>2017-01-04 16:10:28 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2017-11-06 16:23:13 +0100
commit688c50aa72f64ca21767486e5eef876ec23e418c (patch)
treee5e2b86ee875d005308f7540692d5373eba7605f /arch/arm64/include/asm/kvm_hyp.h
parentf2a2129e0ac8d8fa79c3f85425c36f6e3368f022 (diff)
KVM: arm/arm64: Move timer save/restore out of the hyp code
As we are about to be lazy with saving and restoring the timer registers, we prepare by moving all possible timer configuration logic out of the hyp code. All virtual timer registers can be programmed from EL1 and since the arch timer is always a level triggered interrupt we can safely do this with interrupts disabled in the host kernel on the way to the guest without taking vtimer interrupts in the host kernel (yet). The downside is that the cntvoff register can only be programmed from hyp mode, so we jump into hyp mode and back to program it. This is also safe, because the host kernel doesn't use the virtual timer in the KVM code. It may add a little performance performance penalty, but only until following commits where we move this operation to vcpu load/put. Signed-off-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_hyp.h')
-rw-r--r--arch/arm64/include/asm/kvm_hyp.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 4572a9b560fa..08d3bb66c8b7 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -129,8 +129,8 @@ void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);
-void __timer_save_state(struct kvm_vcpu *vcpu);
-void __timer_restore_state(struct kvm_vcpu *vcpu);
+void __timer_enable_traps(struct kvm_vcpu *vcpu);
+void __timer_disable_traps(struct kvm_vcpu *vcpu);
void __sysreg_save_host_state(struct kvm_cpu_context *ctxt);
void __sysreg_restore_host_state(struct kvm_cpu_context *ctxt);