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doc: Make /dev/kvm note more visible. 

Suggested by Giovanni Biscuolo <g@xelera.eu>.

* doc/guix.texi (Invoking guix system): Move note about /dev/kvm access
to the beginning of the 'vm' action description.
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Ludovic Courtès 2019-01-25 22:54:24 +01:00
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19
doc/guix.texi
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@ -23008,6 +23008,16 @@ passed.
@anchor{guix system vm} @anchor{guix system vm}
Build a virtual machine that contains the operating system declared in Build a virtual machine that contains the operating system declared in
@var{file}, and return a script to run that virtual machine (VM). @var{file}, and return a script to run that virtual machine (VM).
@quotation Note
The @code{vm} action and others below
can use KVM support in the Linux-libre kernel. Specifically, if the
machine has hardware virtualization support, the corresponding
KVM kernel module should be loaded, and the @file{/dev/kvm} device node
must exist and be readable and writable by the user and by the
build users of the daemon (@pxref{Build Environment Setup}).
@end quotation
Arguments given to the script are passed to QEMU as in the example Arguments given to the script are passed to QEMU as in the example
below, which enables networking and requests 1@tie{}GiB of RAM for the below, which enables networking and requests 1@tie{}GiB of RAM for the
emulated machine: emulated machine:
@ -23204,15 +23214,6 @@ a list of available debugging commands.
@end table @end table
@end table @end table
@quotation Note
All the actions above, except @code{build} and @code{init},
can use KVM support in the Linux-libre kernel. Specifically, if the
machine has hardware virtualization support, the corresponding
KVM kernel module should be loaded, and the @file{/dev/kvm} device node
must exist and be readable and writable by the user and by the
build users of the daemon (@pxref{Build Environment Setup}).
@end quotation
Once you have built, configured, re-configured, and re-re-configured Once you have built, configured, re-configured, and re-re-configured
your GuixSD installation, you may find it useful to list the operating your GuixSD installation, you may find it useful to list the operating
system generations available on disk---and that you can choose from the system generations available on disk---and that you can choose from the