Comments (4)
QEMU does emulate all the gems may be mdio connection might be missing. Have a look at here how gem3 is connected with phy
https://github.com/Xilinx/qemu-devicetrees/blob/master/board-zynqmp-zcu102.dts#L441
You need to also enable those in linux dts to access those in vm.
from qemu.
Thanks for the response. I'm not using a linux image (it's qnx). The boot stall after cpu 1, when I use the machine type arm-generic-fdt. So I used the hard-coded machine xlnx-zcu102 which boots successfully. qemu ignore when I pass the option hw-dtb board-zynqmp-zcu102.dtb. The machine xlnx-zcu102 is not dts based.. since dumpdtb return nothing. I'm still looking, but not successful on which part of the code to update to get the second GEM functional for xlnx-zcu102
from qemu.
For mainline version of zcu102 always have 4 gem's emulated.
https://github.com/Xilinx/qemu/blob/master/hw/arm/xlnx-zynqmp.c#L606
the phy address here seems constant, i'm not sure how it goes. Can you change it a different address and set the same expectations from guest.
from qemu.
Thanks!! for your help saipava... this issue can be closed. I had to update the QNX Driver for XZYNQ UltraScale+ MPSoC Ethernet GEM. This driver reads GEM interface information from the hwinfo section of the syspage.
The hwinfo section is populated in the board-specific Startup code.
If there is no GEM interface specified in the hwinfo section, the driver will default to using GEM3.
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