Virtualized link states of multiple protocol layer package interconnects

A method performed by physical layer circuitry (PHY), the method comprising:

• receiving an indication to change a first virtual link state for a multilane link, the first virtual link state associated with a first interconnect protocol;
• determining that the first interconnect protocol is ready to change a physical link state associated with the first virtual link state;
• changing the first virtual link state while maintaining a second virtual link state associated with a second interconnect protocol;
• and
• sending a message across the multilane link to indicate the change to the first virtual link state.

A system comprising:

• a first die comprising:
• first physical layer circuitry (PHY),
• a first protocol stack associated with a first interconnect protocol, and
• a second protocol stack associated with a second interconnect protocol;
• a second die comprising a second PHY;
• and
• a multilane link connecting the first die to the second die;
• the second PHY to send to the first PHY a request to change a first virtual link state associated with the first protocol stack;
• the first PHY to:
• receive, from across the multilane link, the request from the second die to change the first virtual link state;
• determine that the first interconnect protocol is ready to change a physical link state;
• and
• change the first virtual link state according to the received request while maintaining a second virtual link state.