QEMU not working with virt-install

[shihweili]

Hello,

I've been trying to get live migration working on my Dell EMC PowerEdge C6525 machine (with SEV support). I'm running Ubuntu 20.04 on my machine. I found that the stock software (virsh 6.0.0 + QEMU-4.2.1 + Linux v5.4) does not support live migration for my SEV-enabled VM.

I therefore tried to compile and install QEMU from the branch below to my system.
https://github.com/AMDESE/qemu/tree/sev_live_migration_v4_1

After the installation completes, when I create a new SEV-enabled VM using the new QEMU (with virt-install), I kept getting the error below:
"ERROR Host does not support any virtualization options for arch 'x86_64'""

I then tried to install the mainline v5.18 Linux to my Ubuntu 20.04 machine, but the same error still exists.

I wonder if I'm missing something here? Any comments/tips would be much appreciated!

[tlendacky]

Hello,

I've been trying to get live migration working on my Dell EMC PowerEdge C6525 machine (with SEV support). I'm running Ubuntu 20.04 on my machine. I found that the stock software (virsh 6.0.0 + QEMU-4.2.1 + Linux v5.4) does not support live migration for my SEV-enabled VM.

Live migration is not yet supported for SEV VMs.

I therefore tried to compile and install QEMU from the branch below to my system. https://github.com/AMDESE/qemu/tree/sev_live_migration_v4_1

After the installation completes, when I create a new SEV-enabled VM using the new QEMU (with virt-install), I kept getting the error below: "ERROR Host does not support any virtualization options for arch 'x86_64'""

Live migration support has not been included in all components (Qemu and OVMF do not have the support, only the Linux kernel), so you are likely not to get live migration working even with the sev_live_migration_v4_1 branch.

I then tried to install the mainline v5.18 Linux to my Ubuntu 20.04 machine, but the same error still exists.

I wonder if I'm missing something here? Any comments/tips would be much appreciated!

[shihweili]

Thanks for your reply! I wonder if there's a plan to support live migration of SEV VMs on QEMU and OVMF?

[jquanC]

Hello,
I've been trying to get live migration working on my Dell EMC PowerEdge C6525 machine (with SEV support). I'm running Ubuntu 20.04 on my machine. I found that the stock software (virsh 6.0.0 + QEMU-4.2.1 + Linux v5.4) does not support live migration for my SEV-enabled VM.

Live migration is not yet supported for SEV VMs.

I therefore tried to compile and install QEMU from the branch below to my system. https://github.com/AMDESE/qemu/tree/sev_live_migration_v4_1
After the installation completes, when I create a new SEV-enabled VM using the new QEMU (with virt-install), I kept getting the error below: "ERROR Host does not support any virtualization options for arch 'x86_64'""

Live migration support has not been included in all components (Qemu and OVMF do not have the support, only the Linux kernel), so you are likely not to get live migration working even with the sev_live_migration_v4_1 branch.

I then tried to install the mainline v5.18 Linux to my Ubuntu 20.04 machine, but the same error still exists.
I wonder if I'm missing something here? Any comments/tips would be much appreciated!

Before seeing this answer, I tried using:
https://github.com/AMDESE/qemu/tree/sev_live_migration_v4_1
and https://github.com/AMDESE/qemu/tree/sev_live_migration_v4_1/sev_live_migration_v5_11 as well as branch sev_live_migration_v5_23 to do a migration test.
Obviously, it failed..

Well, I found that I even can not launch a normal VM with "-enable-kvm" option. Is this reasonable? Got confused.. if someone could explain that..

Additionally, as you mentioned

Live migration support has not been included in all components(Qemu and OVMF do not have the support, only the Linux kernel)

I am wondering if you're aware of the current status of community support. Does the mentioned OVMF branch incorporate migration support?"