Using host CPU definition with hypervisor-cpu-baseline is possible, but it provide incorrect results and thus it should not be documented the same way we describe the correct usage. Also using host-model CPU from domain capabilities was not described clearly enough. Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx> --- docs/manpages/virsh.rst | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/docs/manpages/virsh.rst b/docs/manpages/virsh.rst index 63ad619eab..06c2802b3f 100644 --- a/docs/manpages/virsh.rst +++ b/docs/manpages/virsh.rst @@ -1000,15 +1000,19 @@ As an alternative for *FILE* in case the XML would only contain a CPU model with no additional features the CPU model name itself can be passed as *model*. Exactly one of *FILE* and *model* must be used. -The XML *FILE* may contain either host or guest CPU definitions describing the -host CPU model. The host CPU definition is the <cpu> element and its contents -as printed by ``capabilities`` command. The guest CPU definition may be created -from the host CPU model found in domain capabilities XML (printed by -``domcapabilities`` command). In addition to the <cpu> elements, this command -accepts full capabilities XMLs, or domain capabilities XMLs containing the CPU -definitions. It is recommended to use only the CPU definitions from domain -capabilities, as on some architectures using the host CPU definition may either -fail or provide unexpected results. +The XML *FILE* should contain guest CPU definitions created from the host CPU +model found in the ``<mode name="host-model">`` element domain capabilities +XMLs (printed by the ``domcapabilities`` command on each host). The +``<mode name="host-model">`` elements themselves or even their ``<cpu>`` +parent elements found in domain capabilities XMLs are not accepted. The +elements have to be transformed into actual CPU definitions. + +Alternatively this command will automatically extract the CPU definitions when +provided with domain capabilities XMLs. + +For historical reasons the XML *FILE* may also contain host CPU definitions, +but such usage is strongly discouraged as it will most likely provide incorrect +results. When *FILE* contains only a single CPU definition, the command will print the same CPU with restrictions imposed by the capabilities of the hypervisor. -- 2.48.1
