[PATCH 0/3] VIA PM Improvements

[Bernhard Beschow]

This series is part of my work to bring the VIA south bridges to the PC machine
[1]. First it resolves a fixme in the device model by using the dedicated ACPI
interrupt register for SCI routing. It then enables the device model to switch
to ACPI. Finally, ACPI shutdown is implemented which guests can take advantage
of after switching to ACPI mode.

Testing done:
- `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`
- `qemu-system-ppc -M pegasos2 \
                   -device ati-vga,romfile="" \
                   -cdrom morphos-3.17.iso \
                   -bios pegasos2.rom`
- `qemu-system-x86_64 -M pc -m 2G -accel kvm -cpu host -cdrom
   manjaro-kde-21.3.2-220704-linux515.iso` on my pc-via branch seems to work
   without any noticable differences to piix3 except that hotplugging isn't
   implemented.

[1] https://github.com/shentok/qemu/tree/pc-via

Bernhard Beschow (3):
  hw/isa/vt82c686: Fix SCI routing
  hw/isa/vt82c686: Allow PM controller to switch to ACPI mode
  hw/isa/vt82c686: Implement ACPI powerdown

 hw/isa/vt82c686.c | 75 +++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 62 insertions(+), 13 deletions(-)

-- 
2.39.1