Constraints

Application Constraints

The hardware server must be equipped with the Kunpeng 950 processor.

SMT

Enabling CPU simultaneous multi-threading (SMT) may introduce side-channel attacks and other risks affecting confidential computing workloads. It is therefore recommended to deploy confidential computing workloads on systems with SMT disabled. To disable SMT, see Disabling SMT.

Overcommitment

CPU or memory overcommitment is not supported.

Commands Supported by libvirt

Commands Supported by libvirt lists the libvirt commands for cVMs:

**Table 1** libvirt commands
virsh Subcommand	Description	Option	Supported on cVMs	Supported on Other VMs
define	Defines a VM domain from a specified XML file.	--validate	√	√
undefine	Destroys a VM domain.	--managed-save	x	√
		--storage	√	√
		--remove-all-storage	√	√
		--delete-storage-volume-snapshots	x	√
		--wipe-storage	√	√
		--snapshots-metadata	x	√
		--checkpoints-metadata	x	√
		--nvram	x	√
		--keep-nvram	x	√
		--tpm	x	√
		--keep-tpm	x	√
start	Starts a defined VM.	--console	√	√
		--paused	x	√
		--autodestroy	√	√
		--bypass-cache	√	√
		--force-boot	x	√
		--pass-fds	x	√
		--reset-nvram	x	√
destroy	Destroys a running VM.	--graceful	√	√
destroy	Destroys a running VM.	--remove-logs	√	√
console	Logs in to a VM through the serial port.	--devname	√	√
		--force	√	√
		--resume	x	√
		--safe	√	√
create	Creates and starts a VM from a specified XML file.	--console	√	√
		--paused	x	√
		--autodestroy	√	√
		--pass-fds	x	√
		--validate	√	√
		--reset-nvram	x	√
√: Supported by cVMs or common VMs. x: Not supported by cVMs or common VMs.

Parent topic: Feature Description