On 25/07/18 14:03, Paolo Bonzini wrote:
It's possible as long as you don't add any members. You can add a new
const char* argument to ide_bus_new, and call it from cmd646.
However, another possibility is to implement the FWPathProvider
interface in the sun4u machine type. See hw/ppc/spapr.c for an example.
The FWPathProvider approach seems to be working much better, however I'm
still a bit stuck trying to set the bootindex for the in-built IDE
interface. Normally I would use -hda for the internal IDE hd and -cdrom
for the CDROM, but to support bootindex then I need to use -drive.
On PPC macio has 2 IDE interfaces at 0x20000 and 0x21000 and from
reading the manual I can see that the following works as expected for
index between 0 and 2:
$ ./qemu-system-ppc -drive
id=cd,file=MacOS921-macsbug.iso,if=ide,index=0 -nographic -prom-env
'auto-boot?=false'
Setting index=3 does something a little more strange compared to using
plain -cdrom:
$ ./qemu-system-ppc -drive
id=cd,file=MacOS921-macsbug.iso,if=ide,media=cdrom,index=3 -nographic
-prom-env 'auto-boot?=false'
0 > show-devs
fff8990c /pci@80000000/mac-io@3/ata-3@20000 (ata)
fff89c98 /pci@80000000/mac-io@3/ata-3@21000 (ata)
fff8a024 /pci@80000000/mac-io@3/ata-3@21000/cdrom@0 (block)
fff8a4fc /pci@80000000/mac-io@3/ata-3@21000/cdrom@0/disk@1 (block)
The issue here seems to be that according to "info qtree" there is
*always* an ide-cd device plugged into the location equivalent to that
of -cdrom, and so with the above command QEMU ends up adding a second
ide-cd device to the ide.1 bus which confuses OpenBIOS. Is this
deliberate behaviour?
Finally it seems I can't set bootindex with if=ide:
$ ./qemu-system-ppc -drive
id=cd,file=MacOS921-macsbug.iso,if=ide,index=0 -device
ide-cd,drive=cd,bootindex=0 -nographic -prom-env 'auto-boot?=false'
qemu-system-ppc: -device ide-cd,drive=cd,bootindex=0: Drive 'cd' is
already in use because it has been automatically connected to another
device (did you need 'if=none' in the drive options?)
And if I try if=none as suggested then according to "info qtree" the
drive never gets attached to the in-built ide.0 bus in the first place:
$ ./qemu-system-ppc -drive
id=cd,file=MacOS921-macsbug.iso,if=none,index=0 -device
ide-cd,drive=cd,bootindex=0 -nographic -prom-env 'auto-boot?=false'
I'm sure that I'm missing something really obvious here related to
in-built devices but I can't quite see it at the moment...
ATB,
Mark.
