Can beagleboard ubuntu work as I2C-slave in userspace?

Dear experts,

I am using Ubuntu on beagleboard. Using i2c-tools, it seems that i2c
can be made to work in userspace apps. However, I get the impression
that only I2C master can work. May I know if i2C-slave can be made to
work in userspace on a beagleboard running Ubuntu?

Thank you.