Re: [libvirt] [PATCH v2 1/2] conf: add support for setting OEM strings SMBIOS data fields

On 01/17/2018 12:37 PM, Daniel P. Berrange wrote: > The OEM strings table in SMBIOS allows the vendor to pass arbitrary > strings into the guest OS. This can be used as a way to pass data to an > application like cloud-init, or potentially as an alternative to the > kernel command line for OS installers where you can't modify the install > ISO image to change the kernel args. > > As an example, consider if cloud-init and anaconda supported OEM strings > you could use something like > > <oemStrings> > <entry>cloud-init:ds=nocloud-net;s=http://10.10.0.1:8000/</entry> > <entry>anaconda:method=http://dl.fedoraproject.org/pub/fedora/linux/rel... > </oemStrings> > > use of a application specific prefix as illustrated above is > recommended, but not mandated, so that an app can reliably identify > which of the many OEM strings are targetted at it. > > Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; > --- > docs/formatdomain.html.in | 13 ++++++++++++ > docs/schemas/domaincommon.rng | 9 +++++++++ > src/conf/domain_conf.c | 47 +++++++++++++++++++++++++++++++++++++++++++ > src/util/virsysinfo.c | 33 ++++++++++++++++++++++++++++++ > src/util/virsysinfo.h | 10 +++++++++ > 5 files changed, 112 insertions(+) > > diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in > index d272cc1ba6..6af2d26209 100644 > --- a/docs/formatdomain.html.in > +++ b/docs/formatdomain.html.in > @@ -411,6 +411,10 @@ > &lt;entry name='version'&gt;0B98401 Pro&lt;/entry&gt; > &lt;entry name='serial'&gt;W1KS427111E&lt;/entry&gt; > &lt;/baseBoard&gt; > + &lt;oemStrings&gt; > + &lt;entry&gt;myappname:some arbitrary data&lt;/entry&gt; > + &lt;entry&gt;otherappname:more arbitrary data&lt;/entry&gt; > + &lt;/oemStrings&gt; > &lt;/sysinfo&gt; > ...</pre> > > @@ -498,6 +502,15 @@ > validation and <code>date</code> format checking, all values are > passed as strings to the hypervisor driver. > </dd> > + <dt><code>oemStrings</code></dt> > + <dd> > + This is block 11 of SMBIOS. This element should appear once and > + can have multiple <code>entry</code> child elements, each providing > + arbitrary string data. There are no restrictions on what data can > + be provided in the entries, however, if the data is intended to be s/, however/; however