Qubes 4.0 qemu device controller mptsas1068 not seen by ReactOS

[Steve Coleman]

I saw that a while back a Qubes discussion on qemu's disk controller vs
Windows support, which if I recall correctly required a modification to
the qemu device being passed to the HVM. It appears that Qubes HVM is
currently passing "-device mptsas1068 -id=scsi0" which appears to not be
seen by ReactOS. I know that ReactOS used to work under Q3.2, but my
current Q4.0 system doesn't present any drive at all to ReactOS, other
than the cdrom from which to boot from.

How is windows being handled right now? The mptsas is working there I
assume?

Is there any kind of user level qvm-prefs setting to change this device
presentation based on the OS requirements? If not, is there any kind of
configuration file for this kind of mod within QEMU itself?

thanks,

Steve.

[awokd]

For reference, the related issue is
https://github.com/QubesOS/qubes-issues/issues/2809. Looks like that
controller is specified in vmm-xen/patch-stubdom-linux-0005.patch, which
patches tools/libxl/libxl_dm.c. I don't see a user level way to change it,
but possibly one could:

1. Change that patch to use a different controller and rebuild and
reinstall Qubes. This would impact every HVM.
2. Add a user level setting somehow and another patch to libxl_dm.c to
specify the controller differently.
3. Possibly build a config with custom controller for the HVM like in
https://groups.google.com/forum/?_escaped_fragment_=topic/qubes-users/jZnKHg1a4Gs#!topic/qubes-users/jZnKHg1a4Gs
?