IBM z13s, Technical Manual

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IBM z13s Technical Guide
The KVM for IBM z Systems kernel provides the core virtualized infrastructure. It can
schedule virtual machines on real CPUs and manage their access to real memory. QEMU
runs in a user space and implements virtual machines using KVM module functions. QEMU
virtualizes real storage and network resources for a virtual machine, which in turn uses
virtio
drivers to access these virtualized resources as shown in Figure F-2.
Figure F-2 Open source virtualization (KVM for IBM z Systems)
The network interface in Linux on z Systems is a virtual Ethernet interface. The interface
name is
eth
. Multiple Ethernet interfaces can be defined to Linux and are handled by the
virtio_net
device driver module. This module must either be compiled into the Linux kernel or
loaded automatically during the boot process.
In Linux, a generic virtual block device is used instead of specific devices, such as ECKD or
SCSI devices. The virtual block devices are handled by the
virtio_blk
device driver module.
This module must either be compiled into the Linux kernel or loaded automatically during the
boot process.
For more information about KVM on IBM z Systems, see:
http://www.ibm.com/systems/z/solutions/virtualization/kvm/
F.2.5 What comes with KVM for IBM z Systems
KVM for IBM z Systems provides standard Linux and KVM interfaces for operational control of
the environment, such as standard drivers and application programming interfaces (APIs), as
well as system emulation support and virtualization management. Shipped as part of KVM for
IBM z Systems are the following functions:
򐂰 The command-line interface (CLI) is a common, familiar Linux interface environment that
is used to issue commands and interact with the KVM hypervisor. The users issues a
series of successive lines of commands to change or control the environment.