Hello all,
After checking character device option for qemu invocation, https://www.qemu.org/docs/master/system/invocation.html#hxtool-6 I tried to add another uart for a modified arm64 virt machine (named ab21q). So I added second uart like this (in hw/arm/ab21q.c which is modified from hw/arm/virt.c, using qemu-6.2.0) create_uart(vms, AB21Q_UART, sysmem, serial_hd(0)); create_uart(vms, AB21Q_UART1, sysmem, serial_hd(1)); // second uart // AB21Q_UART and AB21Q_UART1 have their own address space and irq number I added the command option -chardev stdio,mux=on,id=char0 -serial chardev:char0 -serial chardev:char0 But qemu gives this error : qemu-system-aarch64: cannot use stdio by multiple character devices (BTW, I'm running from u-boot program for starting linux) How can I add second uart and make the second uart output to appear in the stdio also? Any comment or help will be much appreciated. Thank you! Chan Kim
