[PATCH v3 54/59] KVM: arm/arm64: GICv4: Enable virtual cpuif if VLPIs can be delivered
From: Marc Zyngier <hidden>
Date: 2017-07-31 17:28:49
Also in:
kvm, kvmarm, lkml
Subsystem:
kernel virtual machine (kvm), the rest · Maintainers:
Paolo Bonzini, Linus Torvalds
In order for VLPIs to be delivered to the guest, we must make sure that the cpuif is always enabled, irrespective of the presence of virtual interrupt in the LRs. Signed-off-by: Marc Zyngier <redacted> --- virt/kvm/arm/hyp/vgic-v3-sr.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index 91728faa13fd..f5c3d6d7019e 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c@@ -258,7 +258,8 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu) cpu_if->vgic_ap1r[0] = __vgic_v3_read_ap1rn(0); } } else { - if (static_branch_unlikely(&vgic_v3_cpuif_trap)) + if (static_branch_unlikely(&vgic_v3_cpuif_trap) || + cpu_if->its_vpe.its_vm) write_gicreg(0, ICH_HCR_EL2); cpu_if->vgic_elrsr = 0xffff;
@@ -337,9 +338,11 @@ void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu) /* * If we need to trap system registers, we must write * ICH_HCR_EL2 anyway, even if no interrupts are being - * injected, + * injected. Same thing if GICv4 is used, as VLPI + * delivery is gated by ICH_HCR_EL2.En. */ - if (static_branch_unlikely(&vgic_v3_cpuif_trap)) + if (static_branch_unlikely(&vgic_v3_cpuif_trap) || + cpu_if->its_vpe.its_vm) write_gicreg(cpu_if->vgic_hcr, ICH_HCR_EL2); }
--
2.11.0