On 12/4/18 7:24 PM, Peter Maydell wrote: > On Tue, 4 Dec 2018 at 18:06, Eduardo Habkost <ehabk...@redhat.com> wrote: >> In either case, I'm still missing a clear description of what a >> cluster is supposed to represent, exactly (see my previous reply >> on this thread). > > Here's my attempt: > > A cluster is a group of CPUs which are all identical and have > the same view of the rest of the system. > If CPUs are not identical (for example, Cortex-A53 and > Cortex-A57 CPUs in an Arm big.LITTLE system) they should be > in different clusters. > If the CPUs do not have the same view of memory (for example > the main CPU and a management controller processor) they should > be in different clusters. Thanks, I'll use that as a start point for the documentation in cluster.h
-- Luc > > I agree that this is slightly confusing, because the concept > is on the boundary between something that's real in hardware > (eg in a big.LITTLE setup the CPUs are in separate hardware > clusters, and of coures a BMC processor and the main CPU > are definitely different things) and something that we're > defining for its effects on the GDB UI and so we can make > sure we don't share TCG translated code where we shouldn't. > > thanks > -- PMM >
