VIRTIO_MMIO_DRIVER_FEATURES_SEL 136 drivers/virtio/virtio_mmio.c writel(1, vm_dev->base + VIRTIO_MMIO_DRIVER_FEATURES_SEL); VIRTIO_MMIO_DRIVER_FEATURES_SEL 140 drivers/virtio/virtio_mmio.c writel(0, vm_dev->base + VIRTIO_MMIO_DRIVER_FEATURES_SEL);