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.
Acked-by: Christoffer Dall <cdall@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
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);
}
--
2.14.1
