[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] Direct guest device access from nested guest
From: |
Lluís Vilanova |
Subject: |
[Qemu-devel] Direct guest device access from nested guest |
Date: |
Wed, 28 Aug 2013 17:28:24 +0300 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) |
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
- [Qemu-devel] Direct guest device access from nested guest,
Lluís Vilanova <=
- Re: [Qemu-devel] Direct guest device access from nested guest, Jan Kiszka, 2013/08/28
- Re: [Qemu-devel] Direct guest device access from nested guest, Lluís Vilanova, 2013/08/28
- Re: [Qemu-devel] Direct guest device access from nested guest, Jan Kiszka, 2013/08/28
- Re: [Qemu-devel] Direct guest device access from nested guest, Lluís Vilanova, 2013/08/28
- Re: [Qemu-devel] Direct guest device access from nested guest, Aaron Fabbri, 2013/08/29
- [Qemu-devel] Fwd: Direct guest device access from nested guest, Aaron Fabbri, 2013/08/29
- Re: [Qemu-devel] Direct guest device access from nested guest, Muli Ben-Yehuda, 2013/08/30