mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-04 17:44:14 +08:00
197165d449
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>
16 lines
364 B
C
16 lines
364 B
C
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License, version 2, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Copyright (C) 2015 Naveen N. Rao, IBM Corporation
|
|
*/
|
|
|
|
#include <asm/trace_clock.h>
|
|
#include <asm/time.h>
|
|
|
|
u64 notrace trace_clock_ppc_tb(void)
|
|
{
|
|
return get_tb();
|
|
}
|