[RFC PATCH-for-8.0 06/10] hw/virtio: Cache access_is_big_endian value in VirtIODevice state

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

The device endianness doesn't change during runtime.
Cache it in the VirtIODevice state.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
RFC: I'm not sure virtio_init() is the correct place to add this
     check. We want to initialize this field once the features are
     negociated.
---
 hw/virtio/virtio.c         | 1 +
 include/hw/virtio/virtio.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 09b1a0e3d9..dbb1fe33f7 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3193,6 +3193,7 @@ void virtio_init(VirtIODevice *vdev, uint16_t device_id, size_t config_size)
     vdev->vmstate = qdev_add_vm_change_state_handler(DEVICE(vdev),
             virtio_vmstate_change, vdev);
     vdev->device_endian = virtio_default_endian();
+    vdev->access_is_big_endian = virtio_access_is_big_endian(vdev);
     vdev->use_guest_notifier_mask = true;
 }
 
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index acfd4df125..5f28e51e93 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -130,6 +130,7 @@ struct VirtIODevice
     bool vhost_started;
     VMChangeStateEntry *vmstate;
     char *bus_name;
+    bool access_is_big_endian;
     uint8_t device_endian;
     bool use_guest_notifier_mask;
     AddressSpace *dma_as;
-- 
2.38.1