Can this function be realized?

C5 configure as EP,X8 configure as two x4,

C0 configure as RC

A’s C5(x4) connect to B’s C0,B’s C5(x4) connect to A’s C0, meanwhile another two x4(C5) connect to RC(switch or other devices)

looking forward to your reply.thank you

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x8 can’t be configured to two x4, one controller for one port only.

thank you for your reply

I have another question,C5 configure to x4,which 4 lanes can work?

thank you for your reply

I have another question,C5 configure to x4,which 4 lanes can work?

Only one lane mapping as you can see in OEM DG, no other x4 except C0 and C5.