Re: EDK2 ArmVirtQemu behaviour with multiple UARTs

2023-09-21 Thread Gerd Hoffmann
On Thu, Sep 21, 2023 at 04:34:27PM +0100, Peter Maydell wrote: > As long as EDK2 does something sensible when the DTB says "two > UARTs here and here" and it also finds a virtio-serial PCI > device, I don't mind what exactly it does. The problem here is > more that EDK2 currently does strange thing

Re: EDK2 ArmVirtQemu behaviour with multiple UARTs

2023-09-21 Thread Peter Maydell
On Thu, 21 Sept 2023 at 16:26, Gerd Hoffmann wrote: > > On Thu, Sep 21, 2023 at 11:50:20AM +0100, Peter Maydell wrote: > > Hi; I've been looking again at a very long standing missing feature in > > the QEMU virt board, which is that we only have one UART. One of the > > things that has stalled thi

Re: EDK2 ArmVirtQemu behaviour with multiple UARTs

2023-09-21 Thread Gerd Hoffmann
On Thu, Sep 21, 2023 at 11:50:20AM +0100, Peter Maydell wrote: > Hi; I've been looking again at a very long standing missing feature in > the QEMU virt board, which is that we only have one UART. One of the > things that has stalled this in the past has been the odd behaviour of > EDK2 if the DTB t

EDK2 ArmVirtQemu behaviour with multiple UARTs

2023-09-21 Thread Peter Maydell
Hi; I've been looking again at a very long standing missing feature in the QEMU virt board, which is that we only have one UART. One of the things that has stalled this in the past has been the odd behaviour of EDK2 if the DTB that QEMU passes it describes two UARTs. I'm going to describe the beha

Re: EDK2 ArmVirtQemu behaviour with multiple UARTs

2023-09-21 Thread Ard Biesheuvel
On Thu, 21 Sept 2023 at 10:50, Peter Maydell wrote: > > Hi; I've been looking again at a very long standing missing feature in > the QEMU virt board, which is that we only have one UART. One of the > things that has stalled this in the past has been the odd behaviour of > EDK2 if the DTB that QEMU