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authorChristoffer Dall <christoffer.dall@linaro.org>2017-10-05 00:18:07 +0200
committerMarc Zyngier <marc.zyngier@arm.com>2018-03-19 10:53:21 +0000
commit923a2e30e5745a8f94f953f7aacaafd3d551e12d (patch)
tree93d52068d4114a54cc5fe92c6eaca3b0be5d9223 /arch/arm64/include/asm/kvm_hyp.h
parent771621b0e2f80629948e0dc627d18b6730778c52 (diff)
downloadlinux-923a2e30e5745a8f94f953f7aacaafd3d551e12d.tar.bz2
KVM: arm/arm64: Move VGIC APR save/restore to vgic put/load
The APRs can only have bits set when the guest acknowledges an interrupt in the LR and can only have a bit cleared when the guest EOIs an interrupt in the LR. Therefore, if we have no LRs with any pending/active interrupts, the APR cannot change value and there is no need to clear it on every exit from the VM (hint: it will have already been cleared when we exited the guest the last time with the LRs all EOIed). The only case we need to take care of is when we migrate the VCPU away from a CPU or migrate a new VCPU onto a CPU, or when we return to userspace to capture the state of the VCPU for migration. To make sure this works, factor out the APR save/restore functionality into separate functions called from the VCPU (and by extension VGIC) put/load hooks. Reviewed-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/include/asm/kvm_hyp.h')
-rw-r--r--arch/arm64/include/asm/kvm_hyp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index febe417b8b4e..6f3929b2fcf7 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -124,6 +124,8 @@ int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu);
void __vgic_v3_save_state(struct kvm_vcpu *vcpu);
void __vgic_v3_restore_state(struct kvm_vcpu *vcpu);
+void __vgic_v3_save_aprs(struct kvm_vcpu *vcpu);
+void __vgic_v3_restore_aprs(struct kvm_vcpu *vcpu);
int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu);
void __timer_enable_traps(struct kvm_vcpu *vcpu);