Difference between pages "KVM" and "Widget:NewsDisplay"

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m (tt 2 code, /etc/kvm to /dev/kvm, add gpasswd, fancy to not so much, a bunch of nit picking)
 
 
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== Introduction ==
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KVM is a hardware-accelerated full-machine hypervisor and virtualization solution included as part of kernel 2.6.20 and later. It allows you to create and start hardware-accelerated virtual machines under Linux using the QEMU tools.
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== Kernel Setup ==
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<span style="color: #888; font-size: 10px;"><!--{$date|escape:'html'}--> by <a href="<!--{$user|escape:'html'}-->"><!--{$user|escape:'html'}--></a></span>
To enable KVM, the following kernel config parameters should be enabled (this is based on a 3.x kernel):
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Under <code>Processor type and features</code>, enable <code>Linux guest support</code>, and enable the following options:
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{{kernelop|title=Processor type and features,Linux guest support|desc=
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--- Linux guest support
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[*]  Enable paravirtualization code
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[ ]    paravirt-ops debugging (NEW)
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[*]    Paravirtualization layer for spinlocks
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[ ]    Xen guest support (NEW)
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[*]  KVM Guest support (including kvmclock) (NEW)
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[ ]    Enable debug information for KVM Guests in debugfs (NEW)
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[ ]  Paravirtual steal time accounting (NEW)
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}}
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Under the <code>Virtualization</code> category from the main kernel config menu, enable <code>Kernel-based Virtual Machine (KVM) support</code>, and enable at least one type of KVM, either for Intel or AMD processors. It is also recommended to enable <code>Host kernel acceleration for virtio net</code>.
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{{kernelop|title=Virtualization|desc=
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--- Virtualization
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<M>   Kernel-based Virtual Machine (KVM) support
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<M>     KVM for Intel processors support
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<M>     KVM for AMD processors support
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[*]    KVM legacy PCI device assignment support
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<M>  Host kernel accelerator for virtio net
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}}
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You can use modules or build these parts directly into the kernel. Build your new kernel and modules, and reboot.
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== User-space tools ==
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If you are using QEMU on your desktop, add the following USE flag to <code>/etc/portage/make.conf</code>:
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<pre>
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USE="$USE usbredir"
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</pre>
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This will enable good mouse support for QEMU on your desktop.
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Now, emerge qemu:
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<console>
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# ##i## emerge qemu
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</console>
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==Initial Setup==
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Prior to using KVM, modprobe the appropriate accelerated driver for Intel or AMD:
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<console>
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# ##i##modprobe kvm_intel
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</console>
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== Next Steps ==
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{{important|Before using KVM, be sure that your user account is in the <code>kvm</code> group. You will need to use a command such as <code>vigr</code> or <code>gpasswd -a $USER kvm</code> as root to do this, and then log out and log back in for this to take effect.}}
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{{important|Atm the group <code>kvm</code> has no access to /dev/kvm. Change this with
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chown root:kvm /dev/kvm
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chmod g+rw /dev/kvm
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and kvm will start like expected [https://bugs.funtoo.org/browse/FL-1626 (see bug FL-1626)] }}
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For information on how to use KVM with various operating systems, see:
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* [[Windows 7 Virtualization with KVM]]
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* [[Linux on KVM]]
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[[Category:Virtualization]]
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[[Category:KVM]]
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Revision as of 03:18, October 20, 2014

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