Hi,

This series implements the suggestions from Markus analysis:
https://www.mail-archive.com/qemu-block@nongnu.org/msg84090.html
on the ISA bus.

There is still work to do (remove global get_system_io?) but
this is enough to convert a crash to an error message, and
the changes are simple, so posting now as RFC.

TBC...

Philippe Mathieu-Daudé (11):
  hw/isa: Explode pci_create_simple() calls
  hw/ide: Add PCIIDEState::isa_bus link
  hw/ide/piix: Set the ISA-bus QOM link
  hw/ide/via: Set the ISA-bus QOM link
  hw/isa: Extract isa_bus_get_irq() from isa_get_irq()
  hw/ide: Replace isa_get_irq() by isa_bus_get_irq()
  hw/isa: Simplify isa_get_irq()
  hw/isa: Extract bus part from isa_register_portio_list()
  hw/ide: Let ide_init_ioport() take an ISA bus argument instead of
    device
  hw/isa: Remove use of global isa bus
  hw/isa: Rename isabus singleton as 'g_isabus'

 include/hw/ide/internal.h |  3 +-
 include/hw/ide/pci.h      |  1 +
 include/hw/isa/isa.h      |  5 ++++
 hw/i386/pc_piix.c         |  7 +++--
 hw/ide/ioport.c           | 11 +++----
 hw/ide/isa.c              |  3 +-
 hw/ide/piix.c             | 22 +++++++++++---
 hw/ide/via.c              | 18 ++++++++++--
 hw/isa/isa-bus.c          | 61 +++++++++++++++++++++++++++++----------
 hw/isa/piix4.c            | 13 ++++++---
 hw/mips/fuloong2e.c       |  7 ++++-
 hw/ppc/pegasos2.c         |  7 ++++-
 12 files changed, 122 insertions(+), 36 deletions(-)

-- 
2.26.3