[PATCH 0/1] hw/arm/aspeed: Allow machine to set serial_hd(0)

[<pdel@fb.com>]

From: Peter Delevoryas <pdel@fb.com>

This is a follow-up to a discussion in a previous series I sent:

https://lore.kernel.org/qemu-devel/20210827210417.4022054-1-pdel@fb.com/

I tried to add a new machine type called Fuji that required the ability
to specify the UART connected to the first serial device on the command
line (serial_hd(0)).

After some discussion, we concluded that we could add a serial_dev
option to the machine class and the SoC to support this:

https://lore.kernel.org/qemu-devel/a802ecb1-aa49-fd4c-5bd2-2bb19af56ac9@kaod.org/

I didn't follow Cedric's advice _exactly_, so let me know if you have
suggestions. I used "uint32_t serial_hd0", because I think it more
clearly indicates that this is the device to connect to the first serial
device, serial_hd(0).

Also, I didn't know how to transfer data from the machine class to the
device state, so I just added the attribute to the machine class and
used 'qdev_get_machine' to within aspeed_soc_realize() based on some
code I found in hw/ppc/spapr_cpu_core.c. I expect that I'm missing
something, I've just been having some trouble figuring out the QEMU
object model.

If this patch is accepted, I can follow-up with another patch adding the
fuji machine type with "serial_hd0 = ASPEED_DEV_UART1".

Thanks,
Peter

Peter Delevoryas (1):
  hw/arm/aspeed: Allow machine to set serial_hd(0)

 hw/arm/aspeed.c         |  1 +
 hw/arm/aspeed_ast2600.c | 11 +++++++----
 hw/arm/aspeed_soc.c     |  9 ++++++---
 include/hw/arm/aspeed.h |  1 +
 4 files changed, 15 insertions(+), 7 deletions(-)

-- 
2.30.2