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Re: Xen as a guest under KVM on QEMU for Arm64
- To: xen-users@xxxxxxxxxxxxxxxxxxxx
- From: Paul Leiber <paul@xxxxxxxxxxxxxxxx>
- Date: Thu, 12 Jun 2025 20:00:21 +0200
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- Delivery-date: Thu, 12 Jun 2025 18:01:06 +0000
- List-id: Xen user discussion <xen-users.lists.xenproject.org>
Am 12.06.2025 um 16:50 schrieb Fahad Arslan:
Hi,
Has anyone successfully run Xen as a guest on KVM/QEMU for AArch64 with
MMU and EL2 working?
Hi Fahad,
sorry, I can't help here. The only thing that could potentially be
interesting to you is that I am succesfully running Xen on a bare metal
Raspberry Pi. Perhaps it is possible to run nested virtualization using
Xen as the L0 hypervisor? But not knowing your objectives, my comment
might also be totally off target.
Paul
I’d really appreciate any thoughts or input.
Thanks,
Fahad
On Fri, May 30, 2025 at 12:54 PM Fahad Arslan <fahad.arslan@xxxxxxxxx
<mailto:fahad.arslan@xxxxxxxxx>> wrote:
Hi,
We’re attempting to use nested virtualization (NV2) on an Arm64
platform with ARM’s Virtualization Extensions, using the Linux
kernel 6.15-rc7 and Xen. In this setup, Xen is running as a level-1
(L1) guest hypervisor inside a QEMU “virt” machine, which has been
modified to support KVM as the host hypervisor (L0).
The issue arises when Xen enables the MMU: its identity-mapped
memory region, including the address in TTBR0_EL2, becomes
inaccessible. This results in a translation fault when attempting to
execute the next instruction, halting further progress.
Has anyone successfully run Xen as a guest under KVM on QEMU for
Arm64 with MMU and EL2 functioning correctly?
Thanks,
Fahad
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