Issue

Description of problem: Device is a Curtiss-Wright VPX6-196 SBC: https://www.curtisswrightds.com/products/computing/processors/6u-vpx/vpx6-1961 Datasheet: https://www.curtisswrightds.com/sites/default/files/2022-02/VPX6-1961-Intel-Xeon-W-Single-Board-Computer-product-sheet.pdf The BIOS only supports MMIO-based serial ports. Attempts to install in text mode over a serial port fail. It is still possible to install using a monitor an a keyboard. After that, ttyS5 works as expected. Version-Release number of selected component (if applicable): RHEL 8.7 (rhel-8.7-x86_64-dvd.iso dumped to a USB stick) How reproducible: Always Steps to Reproduce: 1. Boot from the RHEL 8.7 installation media using a serial terminal attaced to the second serial port. 2. At the GRUB prompt, edit the kernel command line to force it to start an early console on the required I/O address and to use ttyS1 later: linuxefi /images/pxeboot/vmlinuz inst.stage2=hd:LABEL=RHEL-8-7-0-BaseOS-x86_64 console=uart,mmio32,0x6006353000,115200n8 console=ttyS1,115200 inst.text 3. Type Ctrl-X to start Actual results: Kernel messages stop being shown after this: [ 0.000000] random: crng done (trusting CPU's manufacturer) [ 0.001000] Console: colour dummy device 80x25 Expected results: The serial port should become the system console and be used by Anaconda to perform the installation. Additional info: At the installation, the srial ports are mapped to ttyS[0-3], according to the anaconda log /var/log/anaconda/journal.log: Jan 01 00:00:43 localhost kernel: dw-apb-uart.1: ttyS0 at MMIO 0x6006354000 (irq = 33, base_baud = 114825) is a 16550A Jan 01 00:00:43 localhost kernel: dw-apb-uart.2: ttyS1 at MMIO 0x6006353000 (irq = 16, base_baud = 114825) is a 16550A Jan 01 00:00:43 localhost kernel: dw-apb-uart.3: ttyS2 at MMIO 0x6006352000 (irq = 17, base_baud = 114825) is a 16550A After the installation, they are mapped to ttyS[4-6] Dec 31 19:54:33 localhost kernel: dw-apb-uart.1: ttyS4 at MMIO 0x6006354000 (irq = 33, base_baud = 114825) is a 16550A Dec 31 19:54:33 localhost kernel: dw-apb-uart.2: ttyS5 at MMIO 0x6006353000 (irq = 16, base_baud = 114825) is a 16550A Dec 31 19:54:33 localhost kernel: dw-apb-uart.3: ttyS6 at MMIO 0x6006352000 (irq = 17, base_baud = 114825) is a 16550A Using ttyS5 at the installation does not make any difference. Attaching a transcript of the serial console during the attempt to install over the serial port. Attaching an sosreport generated after installing the system using minitor and keyboard. --------Unable to render embedded object: File (---------) not found.-------Unable to render embedded object: File (---------) not found.-------Unable to render embedded object: File (---------) not found.--------Unable to render embedded object: File (---------) not found.

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