Hi,
I want to get the following setup, but don't know how (or if it's even
possible):
* A guest VM with two AHCI controllers, with one device each. One of the AHCI
controllers provides the VM's disk ("system"), while the other provides
another disk ("nested") and uses a different emulation driver in QEMU (ahci2):
host$ qemu-system-x86_64 -enable-kvm \
-drive id=system,file=system.img,if=none \
-device ahci,id=ahci \
-device ide-drive,drive=system,bus=ahci.0 \
-drive id=nested,file=nested.img,if=none \
-device ahci2,id=ahci2 \
-device ide-drive,drive=nested,bus=ahci2.0
* A nested guest VM using the guest's (its host) AHCI2 controller.
I've tried assigning the AHCI2 device to the nested guest using "pci-assign"
and "vfio", but without any luck.
The culprit of the problem seems to be I cannot get the nested guest to have
an IOMMU.
Is it possible to give a nested guest direct access to a device on the guest?
(more specifically, an AHCI controller).
Thanks a lot,
Lluis
--
"And it's much the same thing with knowledge, for whenever you learn
something new, the whole world becomes that much richer."
-- The Princess of Pure Reason, as told by Norton Juster in The Phantom
Tollbooth
