Unable to add more than 2 volumes or networks to a vm deployed from a UEFI image

### problem

Unable to add more than 2 volume or network to a vm deployed from a UEFI image

### versions

ACS 4.20.1

### The steps to reproduce the bug

1. Register a UEFI image Template

https://cloud-images.ubuntu.com/noble/current/noble-server-cloudimg-amd64.img

2. Deploy the vm by enabling UEFI secure mode in advanced settings

3. Once the vm is in running state , attach multiple volumes , Exception observed

Logs

```
2025-07-16 04:28:28,947 DEBUG [kvm.storage.KVMStorageProcessor] (AgentRequest-Handler-3:[]) (logid:) Attaching device:

c6ef61d1300f442a86e5

2025-07-16 04:28:28,953 WARN [kvm.storage.KVMStorageProcessor] (AgentRequest-Handler-3:[]) (logid:) Failed to attach device to i-2-653-VM: internal error: No more available PCI slots
2025-07-16 04:28:28,953 DEBUG [kvm.storage.KVMStorageProcessor] (AgentRequest-Handler-3:[]) (logid:) Failed to attach volume [id: 394, uuid: c6ef61d1-300f-442a-86e5-e31f482b64ab, name: test2, path: c6ef61d1-300f-442a-86e5-e31f482b64ab], due to org.libvirt.LibvirtException: internal error: No more available PCI slots

```

4. Try to attach multiple networks, Exception observed

```

2025-07-16 04:36:02,019 DEBUG [kvm.resource.BridgeVifDriver] (AgentRequest-Handler-1:[]) (logid:) Successfully executed process [2045246] for command [/usr/share/cloudstack-common/scripts/vm/network/vnet/modifyvlan.sh -v 2144 -p eth1 -b breth1-2144 -o add ].
2025-07-16 04:36:02,021 WARN [resource.wrapper.LibvirtPlugNicCommandWrapper] (AgentRequest-Handler-1:[]) (logid:) Plug Nic failed due to org.libvirt.LibvirtException: internal error: No more available PCI slots org.libvirt.LibvirtException: internal error: No more available PCI slots
at org.libvirt.ErrorHandler.processError(Unknown Source)
at org.libvirt.ErrorHandler.processError(Unknown Source)

```

Workaround

Change the following settings on the vm after stopping

nicAdapter to e1000 or rtl813

rootDiskController to scsi or sata

https://prnt.sc/9wSS5uX0tVYX

### What to do about it?

If the Template is a UEFI enabled , Cloudstack should check if the template is UEFI enabled or not and populated the necessary settings for root disk and nic adapter

yum install libguestfs-tools

virt-inspector --format=raw -a noble-server-cloudimg-amd64.img 2>/dev/null | grep -i 'true'

virt-inspector -a AlmaLinux-8-GenericCloud-UEFI-latest.x86_64.qcow2 2>/dev/null | grep -i 'true'

Beginne mit den in den Logs gezeigten Pfaden von KVMStorageProcessor und LibvirtPlugNicCommandWrapper und prüfe anschließend, wie die Einstellungen für UEFI-VM-Root-Datenträger und NICs ausgewählt werden. Reproduziere das Problem mit dem Noble-UEFI-Image und verifiziere, dass mehrere Volumes und Netzwerke angehängt werden, ohne die Controller- oder Adaptereinstellungen zu ändern.

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