[PULL 30/36] hw/arm/arm_gicv3_kvm: Add a migration blocker with kvm nested virt

Maintainers: Peter Maydell <peter.maydell@linaro.org>, "Michael S. Tsirkin" <mst@redhat.com>, Igor Mammedov <imammedo@redhat.com>, Ani Sinha <anisinha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Bernhard Beschow <shentey@gmail.com>, Shannon Zhao <shannon.zhaosl@gmail.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, Jonathan Cameron <jonathan.cameron@huawei.com>, Fan Ni <fan.ni@samsung.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, "Daniel P. Berrangé" <berrange@redhat.com>, Fabiano Rosas <farosas@suse.de>, Laurent Vivier <lvivier@redhat.com>
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[PULL 30/36] hw/arm/arm_gicv3_kvm: Add a migration blocker with kvm nested virt
Posted by Peter Maydell 5 months, 1 week ago
From: Eric Auger <eric.auger@redhat.com>

We may be miss some NV related GIC register save/restore. Until
we complete the study, let's add a migration blocker when the
maintenance IRQ is set.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-id: 20250707164129.1167837-5-eric.auger@redhat.com
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 hw/intc/arm_gicv3_kvm.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/hw/intc/arm_gicv3_kvm.c b/hw/intc/arm_gicv3_kvm.c
index b30aac7aee1..8ed88e74299 100644
--- a/hw/intc/arm_gicv3_kvm.c
+++ b/hw/intc/arm_gicv3_kvm.c
@@ -827,8 +827,16 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
     }
 
     if (s->maint_irq) {
+        Error *kvm_nv_migration_blocker = NULL;
         int ret;
 
+        error_setg(&kvm_nv_migration_blocker,
+                   "Live migration disabled because KVM nested virt is enabled");
+        if (migrate_add_blocker(&kvm_nv_migration_blocker, errp)) {
+            error_free(kvm_nv_migration_blocker);
+            return;
+        }
+
         ret = kvm_device_check_attr(s->dev_fd,
                                     KVM_DEV_ARM_VGIC_GRP_MAINT_IRQ, 0);
         if (!ret) {
-- 
2.43.0