On 19 January 2017 at 17:50, Daniel P. Berrange <berra...@redhat.com> wrote: > On Mon, Jan 16, 2017 at 05:54:52PM -0200, Eduardo Habkost wrote: >> Change the meaning of "-cpu host" to "enable all features >> supported by the accelerator in the current host", so that it can >> be used to enable/query all features supported by TCG. >> >> To make sure "host" is still at the end of the list in "-cpu >> help", add a "ordering" field that will be used when sorting the >> CPU model list. > > To be clear, "-cpu host" for TCG is not talking about the actual > host OS feature support, right ? x86_64 TCG can be run on a ppc host, > so presumably "-cpu host" just means "all features that this TCG binary > is able to emulate" ? > > This feels like it is introducing scope for confusion vs KVM -cpu host, > so I wonder if different naming is better for this.
The idea is that you do want an option that works whatever the accelerator is, though, so as a user you don't need to worry about messing with the command line for KVM vs TCG vs "try KVM and fall back to TCG". (I think "-cpu best" has been thrown about as a suggestion for this before.) thanks -- PMM
