On 09.01.2012, at 01:02, Peter Maydell wrote: > On 8 January 2012 23:52, Alexander Graf <ag...@suse.de> wrote: >> During discussions on whether to make -cpu host the default in SLE, I found >> myself disagreeing to the thought, because it potentially opens a big can >> of worms for potential bugs. But if I already am so opposed to it for SLE, >> how >> can it possibly be reasonable to default to -cpu host in upstream QEMU? And >> what would a sane default look like? >> >> So I had this idea of looping through all available CPU definitions. We can >> pretty well tell if our host is able to execute any of them by checking the >> respective flags and seeing if our host has all features the CPU definition >> requires. With that, we can create a -cpu type that would fall back to the >> "best known CPU definition" that our host can fulfill. On my Phenom II >> system for example, that would be -cpu phenom. > > ...shouldn't this be supported on at least all hosts with KVM support, > not just x86?
I don't think it makes sense on any other platform. For PPC -cpu host is good enough, since it's basically doing the same as -cpu best. We only have a single 32 bit number as identifier for -cpu host there. > Also I don't see any documentation updates in this patchset :-) Do we have documentation for -cpu host? Alex
