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author | Rusty Russell <rusty@rustcorp.com.au> | 2014-06-24 19:49:31 +0200 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2014-06-29 19:39:43 +0300 |
commit | e0ab7fac65dc75573d3f02105c80981be4f49c2d (patch) | |
tree | 7882cd5b7aa199debd7be38d3ad77cca5088536a /hw | |
parent | 8c085dbe6d1e3fb3f18cdd05e67980a529a3ba4a (diff) | |
download | qemu-e0ab7fac65dc75573d3f02105c80981be4f49c2d.zip qemu-e0ab7fac65dc75573d3f02105c80981be4f49c2d.tar.gz qemu-e0ab7fac65dc75573d3f02105c80981be4f49c2d.tar.bz2 |
virtio-serial-bus: use virtio wrappers to access headers
We also fix max_nr_ports at reset time as the device endianness may have
changed.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
[ pass VirtIODevice * to memory accessors,
fix max_nr_ports at reset time,
Greg Kurz <gkurz@linux.vnet.ibm.com> ]
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/char/virtio-serial-bus.c | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c index b8af1b1..07bebc0 100644 --- a/hw/char/virtio-serial-bus.c +++ b/hw/char/virtio-serial-bus.c @@ -24,6 +24,7 @@ #include "hw/sysbus.h" #include "trace.h" #include "hw/virtio/virtio-serial.h" +#include "hw/virtio/virtio-access.h" static VirtIOSerialPort *find_port_by_id(VirtIOSerial *vser, uint32_t id) { @@ -183,11 +184,12 @@ static size_t send_control_msg(VirtIOSerial *vser, void *buf, size_t len) static size_t send_control_event(VirtIOSerial *vser, uint32_t port_id, uint16_t event, uint16_t value) { + VirtIODevice *vdev = VIRTIO_DEVICE(vser); struct virtio_console_control cpkt; - stl_p(&cpkt.id, port_id); - stw_p(&cpkt.event, event); - stw_p(&cpkt.value, value); + virtio_stl_p(vdev, &cpkt.id, port_id); + virtio_stw_p(vdev, &cpkt.event, event); + virtio_stw_p(vdev, &cpkt.value, value); trace_virtio_serial_send_control_event(port_id, event, value); return send_control_msg(vser, &cpkt, sizeof(cpkt)); @@ -278,6 +280,7 @@ void virtio_serial_throttle_port(VirtIOSerialPort *port, bool throttle) /* Guest wants to notify us of some event */ static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len) { + VirtIODevice *vdev = VIRTIO_DEVICE(vser); struct VirtIOSerialPort *port; VirtIOSerialPortClass *vsc; struct virtio_console_control cpkt, *gcpkt; @@ -291,8 +294,8 @@ static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len) return; } - cpkt.event = lduw_p(&gcpkt->event); - cpkt.value = lduw_p(&gcpkt->value); + cpkt.event = virtio_lduw_p(vdev, &gcpkt->event); + cpkt.value = virtio_lduw_p(vdev, &gcpkt->value); trace_virtio_serial_handle_control_message(cpkt.event, cpkt.value); @@ -312,10 +315,10 @@ static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len) return; } - port = find_port_by_id(vser, ldl_p(&gcpkt->id)); + port = find_port_by_id(vser, virtio_ldl_p(vdev, &gcpkt->id)); if (!port) { error_report("virtio-serial-bus: Unexpected port id %u for device %s", - ldl_p(&gcpkt->id), vser->bus.qbus.name); + virtio_ldl_p(vdev, &gcpkt->id), vser->bus.qbus.name); return; } @@ -342,9 +345,9 @@ static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len) } if (port->name) { - stl_p(&cpkt.id, port->id); - stw_p(&cpkt.event, VIRTIO_CONSOLE_PORT_NAME); - stw_p(&cpkt.value, 1); + virtio_stl_p(vdev, &cpkt.id, port->id); + virtio_stw_p(vdev, &cpkt.event, VIRTIO_CONSOLE_PORT_NAME); + virtio_stw_p(vdev, &cpkt.value, 1); buffer_len = sizeof(cpkt) + strlen(port->name) + 1; buffer = g_malloc(buffer_len); @@ -510,6 +513,10 @@ static void vser_reset(VirtIODevice *vdev) vser = VIRTIO_SERIAL(vdev); guest_reset(vser); + + /* In case we have switched endianness */ + vser->config.max_nr_ports = + virtio_tswap32(vdev, vser->serial.max_virtserial_ports); } static void virtio_serial_save(QEMUFile *f, void *opaque) @@ -532,7 +539,7 @@ static void virtio_serial_save_device(VirtIODevice *vdev, QEMUFile *f) qemu_put_be32s(f, &s->config.max_nr_ports); /* The ports map */ - max_nr_ports = tswap32(s->config.max_nr_ports); + max_nr_ports = virtio_tswap32(vdev, s->config.max_nr_ports); for (i = 0; i < (max_nr_ports + 31) / 32; i++) { qemu_put_be32s(f, &s->ports_map[i]); } @@ -688,6 +695,12 @@ static int virtio_serial_load_device(VirtIODevice *vdev, QEMUFile *f, qemu_get_be16s(f, (uint16_t *) &tmp); qemu_get_be32s(f, &tmp); + /* Note: this is the only location where we use tswap32() instead of + * virtio_tswap32() because: + * - virtio_tswap32() only makes sense when the device is fully restored + * - the target endianness that was used to populate s->config is + * necessarly the default one + */ max_nr_ports = tswap32(s->config.max_nr_ports); for (i = 0; i < (max_nr_ports + 31) / 32; i++) { qemu_get_be32s(f, &ports_map); @@ -751,9 +764,10 @@ static void virtser_bus_dev_print(Monitor *mon, DeviceState *qdev, int indent) /* This function is only used if a port id is not provided by the user */ static uint32_t find_free_port_id(VirtIOSerial *vser) { + VirtIODevice *vdev = VIRTIO_DEVICE(vser); unsigned int i, max_nr_ports; - max_nr_ports = tswap32(vser->config.max_nr_ports); + max_nr_ports = virtio_tswap32(vdev, vser->config.max_nr_ports); for (i = 0; i < (max_nr_ports + 31) / 32; i++) { uint32_t map, bit; @@ -806,6 +820,7 @@ static void virtser_port_device_realize(DeviceState *dev, Error **errp) VirtIOSerialPort *port = VIRTIO_SERIAL_PORT(dev); VirtIOSerialPortClass *vsc = VIRTIO_SERIAL_PORT_GET_CLASS(port); VirtIOSerialBus *bus = VIRTIO_SERIAL_BUS(qdev_get_parent_bus(dev)); + VirtIODevice *vdev = VIRTIO_DEVICE(bus->vser); int max_nr_ports; bool plugging_port0; Error *err = NULL; @@ -841,7 +856,7 @@ static void virtser_port_device_realize(DeviceState *dev, Error **errp) } } - max_nr_ports = tswap32(port->vser->config.max_nr_ports); + max_nr_ports = virtio_tswap32(vdev, port->vser->config.max_nr_ports); if (port->id >= max_nr_ports) { error_setg(errp, "virtio-serial-bus: Out-of-range port id specified, " "max. allowed: %u", max_nr_ports - 1); @@ -863,7 +878,7 @@ static void virtser_port_device_realize(DeviceState *dev, Error **errp) add_port(port->vser, port->id); /* Send an update to the guest about this new port added */ - virtio_notify_config(VIRTIO_DEVICE(port->vser)); + virtio_notify_config(vdev); } static void virtser_port_device_unrealize(DeviceState *dev, Error **errp) @@ -942,7 +957,8 @@ static void virtio_serial_device_realize(DeviceState *dev, Error **errp) vser->ovqs[i] = virtio_add_queue(vdev, 128, handle_output); } - vser->config.max_nr_ports = tswap32(vser->serial.max_virtserial_ports); + vser->config.max_nr_ports = + virtio_tswap32(vdev, vser->serial.max_virtserial_ports); vser->ports_map = g_malloc0(((vser->serial.max_virtserial_ports + 31) / 32) * sizeof(vser->ports_map[0])); /* |