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authorAnshuman Khandual <khandual@linux.vnet.ibm.com>2013-04-22 19:42:44 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-04-26 16:13:02 +1000
commit3925f46bb5902ba9f227591584e27acb6a32c9b0 (patch)
tree8bffe0b3b134660b8afcd3e535328884187f52fc /arch/powerpc/include
parentb1113557fb5f4d47d888572a7ffeac91fc692743 (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.h1
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