[PATCH] [POWERPC] Make Book-E debug handling SMP safe

[Paul Mackerras]

Kumar Gala writes:

> global_dbcr0 needs to be a per cpu set of save areas instead of a single
> global on all processors.

Looks reasonable.  At some point you might want to use a per-cpu
variable instead of an array in order to reduce cacheline bouncing.

> Also, we switch to using DBCR0_IDM to determine if the user space app is
> being debugged as its a more consistent way.  In the future we should
> support features like hardware breakpoint and watchpoints which will
> have DBCR0_IDM set but not necessarily DBCR0_IC (single step).

That should be OK.

Paul.