diff options
| author | Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2013-04-22 19:42:44 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-04-26 16:13:02 +1000 |
| commit | 3925f46bb5902ba9f227591584e27acb6a32c9b0 (patch) | |
| tree | 8bffe0b3b134660b8afcd3e535328884187f52fc /arch/powerpc/include | |
| parent | b1113557fb5f4d47d888572a7ffeac91fc692743 (diff) | |
powerpc/perf: Enable branch stack sampling framework
Provides basic enablement for perf branch stack sampling framework on
POWER8 processor based platforms. Adds new BHRB related elements into
cpu_hw_event structure to represent current BHRB config, BHRB filter
configuration, manage context and to hold output BHRB buffer during
PMU interrupt before passing to the user space. This also enables
processing of BHRB data and converts them into generic perf branch
stack data format.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/perf_event_server.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h index 3f0c15c6f06..f265049dd7d 100644 --- a/arch/powerpc/include/asm/perf_event_server.h +++ b/arch/powerpc/include/asm/perf_event_server.h @@ -73,6 +73,7 @@ extern int register_power_pmu(struct power_pmu *); struct pt_regs; extern unsigned long perf_misc_flags(struct pt_regs *regs); extern unsigned long perf_instruction_pointer(struct pt_regs *regs); +extern unsigned long int read_bhrb(int n); /* * Only override the default definitions in include/linux/perf_event.h |