user/sven/linux.git/arch/powerpc/kernel/trace_clock.c, branch v4.9.296Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v4.9.2962015-08-06T06:36:23Zpowerpc/ftrace: add powerpc timebase as a trace clock source2015-08-06T06:36:23ZNaveen N. Raonaveen.n.rao@linux.vnet.ibm.com2015-04-24T08:54:44Zurn:sha1:197165d44925bd0fa892990851dee4d312a44b39
Add a new powerpc-specific trace clock using the timebase register,
similar to x86-tsc. This gives us
- a fast, monotonic, hardware clock source for trace entries, and
- a clock that can be used to correlate events across cpus as well as across
hypervisor and guests.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>