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hw/vhost-user-i2c: Add support for VIRTIO_I2C_F_ZERO_LENGTH_REQUEST

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VIRTIO_I2C_F_ZERO_LENGTH_REQUEST is a mandatory feature, that must be
implemented by everyone. Add its support.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Message-Id: <fc47ab63b1cd414319c9201e8d6c7705b5ec3bd9.1644490993.git.viresh.kumar@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Viresh Kumar 2022-02-10 16:34:02 +05:30 committed by Michael S. Tsirkin
parent e65902a913
commit 0a24dd1fd5
2 changed files with 12 additions and 2 deletions
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11
hw/virtio/vhost-user-i2c.c
View File

@ -19,6 +19,11 @@
#define VIRTIO_ID_I2C_ADAPTER 34
#endif
static const int feature_bits[] = {
VIRTIO_I2C_F_ZERO_LENGTH_REQUEST,
VHOST_INVALID_FEATURE_BIT
};
static void vu_i2c_start(VirtIODevice *vdev)
{
BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
@ -113,8 +118,10 @@ static void vu_i2c_set_status(VirtIODevice *vdev, uint8_t status)
static uint64_t vu_i2c_get_features(VirtIODevice *vdev,
uint64_t requested_features, Error **errp)
{
/* No feature bits used yet */
return requested_features;
VHostUserI2C *i2c = VHOST_USER_I2C(vdev);
virtio_add_feature(&requested_features, VIRTIO_I2C_F_ZERO_LENGTH_REQUEST);
return vhost_get_features(&i2c->vhost_dev, feature_bits, requested_features);
}
static void vu_i2c_handle_output(VirtIODevice *vdev, VirtQueue *vq)

3
include/hw/virtio/vhost-user-i2c.h
View File

@ -25,4 +25,7 @@ struct VHostUserI2C {
bool connected;
};
/* Virtio Feature bits */
#define VIRTIO_I2C_F_ZERO_LENGTH_REQUEST 0
#endif /* _QEMU_VHOST_USER_I2C_H */