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Problems with OVMF for Xen HVM
- To: pkg-xen-devel@xxxxxxxxxxxxxxxxxxxxxxx, pkg-qemu-devel@xxxxxxxxxxxxxxxxxxxxxxx
- From: Teddy Astie <teddy.astie@xxxxxxxxxx>
- Date: Tue, 18 Nov 2025 19:14:08 +0100
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- Cc: xen-users@xxxxxxxxxxxxx
- Delivery-date: Wed, 19 Nov 2025 06:56:23 +0000
- List-id: Xen user discussion <xen-users.lists.xenproject.org>
Hello,
We found that the OVMF build used in Debian (with Xen using bios="ovmf")
fails to boot a nested Xen due to problematic ACPI tables, along other
issues like 1 vCPU Linux guests and very slow boot.
It looks like Debian uses a build of OVMF that doesn't have Xen support,
which appears to cause the ACPI tables to get bogus, among some other
issues.
In OVMF source code, there is a separate OvmfXen.dsc which has
Xen-specific drivers (PV drivers) and logic that probably needs to be
built separately and be used for Xen instead.
Teddy
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