hw/intc/arm_gicv3_its: Don't abort on table save failure

The ITS is not fully properly reset at the moment. Caches are
not emptied.

After a reset, in case we attempt to save the state before
the bound devices have registered their MSIs and after the
1st level table has been allocated by the ITS driver
(device BASER is valid), the first level entries are still
invalid. If the device cache is not empty (devices registered
before the reset), vgic_its_save_device_tables fails with -EINVAL.
This causes a QEMU abort().

Cc: qemu-stable@nongnu.org
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reported-by: wanghaibin <wanghaibin.wang@huawei.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c
index 9b00ce50e576efc20d3143543d63b63144299c32..6fb45dffd70628819440ddf8d6a59ec231358f79 100644 (file)
--- a/hw/intc/arm_gicv3_its_kvm.c
+++ b/hw/intc/arm_gicv3_its_kvm.c
@@ -64,20 +64,16 @@ static void vm_change_state_handler(void *opaque, int running,
 {
     GICv3ITSState *s = (GICv3ITSState *)opaque;
     Error *err = NULL;
-    int ret;
 
     if (running) {
         return;
     }
 
-    ret = kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
-                            KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
+    kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
+                      KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
     if (err) {
         error_report_err(err);
     }
-    if (ret < 0 && ret != -EFAULT) {
-        abort();
-    }
 }
 
 static void kvm_arm_its_realize(DeviceState *dev, Error **errp)