diff options
| -rw-r--r-- | hw/char/virtio-serial-bus.c | 12 | ||||
| -rw-r--r-- | include/hw/compat.h | 4 | ||||
| -rw-r--r-- | include/hw/virtio/virtio-serial.h | 2 |
3 files changed, 15 insertions, 3 deletions
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c index 57419b2b6a..db2a9f19bc 100644 --- a/hw/char/virtio-serial-bus.c +++ b/hw/char/virtio-serial-bus.c @@ -541,6 +541,7 @@ static uint64_t get_features(VirtIODevice *vdev, uint64_t features, vser = VIRTIO_SERIAL(vdev); + features |= vser->host_features; if (vser->bus.max_nr_ports > 1) { virtio_add_feature(&features, VIRTIO_CONSOLE_F_MULTIPORT); } @@ -1003,6 +1004,7 @@ static void virtio_serial_device_realize(DeviceState *dev, Error **errp) VirtIODevice *vdev = VIRTIO_DEVICE(dev); VirtIOSerial *vser = VIRTIO_SERIAL(dev); uint32_t i, max_supported_ports; + size_t config_size = sizeof(struct virtio_console_config); if (!vser->serial.max_virtserial_ports) { error_setg(errp, "Maximum number of serial ports not specified"); @@ -1017,10 +1019,12 @@ static void virtio_serial_device_realize(DeviceState *dev, Error **errp) return; } - /* We don't support emergency write, skip it for now. */ - /* TODO: cleaner fix, depending on host features. */ + if (!virtio_has_feature(vser->host_features, + VIRTIO_CONSOLE_F_EMERG_WRITE)) { + config_size = offsetof(struct virtio_console_config, emerg_wr); + } virtio_init(vdev, "virtio-serial", VIRTIO_ID_CONSOLE, - offsetof(struct virtio_console_config, emerg_wr)); + config_size); /* Spawn a new virtio-serial bus on which the ports will ride as devices */ qbus_create_inplace(&vser->bus, sizeof(vser->bus), TYPE_VIRTIO_SERIAL_BUS, @@ -1116,6 +1120,8 @@ VMSTATE_VIRTIO_DEVICE(console, 3, virtio_serial_load, virtio_vmstate_save); static Property virtio_serial_properties[] = { DEFINE_PROP_UINT32("max_ports", VirtIOSerial, serial.max_virtserial_ports, 31), + DEFINE_PROP_BIT64("emergency-write", VirtIOSerial, host_features, + VIRTIO_CONSOLE_F_EMERG_WRITE, true), DEFINE_PROP_END_OF_LIST(), }; diff --git a/include/hw/compat.h b/include/hw/compat.h index 46412b229a..ef3fae3e1b 100644 --- a/include/hw/compat.h +++ b/include/hw/compat.h @@ -7,6 +7,10 @@ .property = "page-per-vq",\ .value = "on",\ },{\ + .driver = "virtio-serial-device",\ + .property = "emergency-write",\ + .value = "off",\ + },{\ .driver = "ioapic",\ .property = "version",\ .value = "0x11",\ diff --git a/include/hw/virtio/virtio-serial.h b/include/hw/virtio/virtio-serial.h index 730c88d2a7..b19c44727f 100644 --- a/include/hw/virtio/virtio-serial.h +++ b/include/hw/virtio/virtio-serial.h @@ -184,6 +184,8 @@ struct VirtIOSerial { struct VirtIOSerialPostLoad *post_load; virtio_serial_conf serial; + + uint64_t host_features; }; /* Interface to the virtio-serial bus */ |