[PATCH v3 0/3] VT82xx PCI IRQ routing fixes

[Bernhard Beschow]

This series makes PCI interrupt routing in the VIA south bridges more compliant
to the PCI specification. It aims to help bringing audio output support to the
ppc/pegasos2 machine [1].

v3:
* Remove superfluous if statement in patch 2 (Phil)

v2:
* Remove audio patches which were included for proof of concept

Testing done with via-ac97 audio patches on top:
* `make check`
* `qemu-system-ppc -M pegasos2 -rtc base=localtime -device
  ati-vga,guest_hwcursor=true,romfile="" -cdrom morphos-3.17.iso -kernel
  morphos-3.17/boot.img`
  -> There is a nice sound when the Desktop becomes visible.
* `qemu-system-ppc -M pegasos2 -bios pegasos2.rom -rtc base=localtime -device
  ati-vga,guest_hwcursor=true,romfile="" -cdrom morphos-3.17.iso`
  -> There is a nice sound when the Desktop becomes visible.
* `qemu-system-ppc -M pegasos2 -bios pegasos2.rom -rtc base=localtime -device
  ati-vga,guest_hwcursor=true,romfile="" -cdrom morphos-3.17.iso -device
  usb-mouse -device usb-kbd`
  -> The machine hangs when audio is supposed to play while the mouse is moved.
     This behavior can also be reproduced in v1.

[1] cover.1677004414.git.balaton@eik.bme.hu/">https://patchew.org/QEMU/cover.1677004414.git.balaton@eik.bme.hu/

Bernhard Beschow (3):
  hw/ppc/pegasos2: Initialize VT8231 PCI IRQ router
  hw/isa/vt82c686: Implement PCI IRQ routing
  hw/usb/vt82c686-uhci-pci: Use PCI IRQ routing

 hw/isa/vt82c686.c          | 41 ++++++++++++++++++++++++++++++++++++++
 hw/ppc/pegasos2.c          |  6 ++++++
 hw/usb/vt82c686-uhci-pci.c | 12 -----------
 3 files changed, 47 insertions(+), 12 deletions(-)

-- 
2.39.2