On 04/03/2020 03:11, jasper.low...@bt.com wrote: >> cmd646_update_irq() only seems to raise PCI interrupt, should it also >> have >> an option to use INT 14 and 15 in legacy mode similar to what my >> patch >> does for via-ide? > > Looking through /qemu/hw/ide/cmd646.c it doesn't look like QEMU has > support for legacy mode. At the very least, it looks like we default to > PCI native mode: > > static void pci_cmd646_ide_realize(PCIDevice *dev, Error **errp) > ... > pci_conf[PCI_CLASS_PROG] = 0x8f; > ... > > To add support for legacy mode it would require changing > cmd646_update_irq() and maybe cmd646_set_irq() so that interrupts are > conditionally raised on IRQ14 and/or IRQ15 when the ports are in legacy > mode.
Yes, that's correct. However I'm quite confident from booting other non-Solaris OSs under qemu-system-sparc64 that PCI native mode is being used, particularly as it is possible to see the related PCI sabre IRQ routing configuration changes. ATB, Mark.
