diff options
| author | Paul Mackerras <paulus@samba.org> | 2009-06-17 21:52:09 +1000 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-06-18 11:11:45 +0200 |
| commit | 079b3c569c87819e7a19d9b9f51d4746fc47bf9a (patch) | |
| tree | 63dd236c582eebebb0667a3e5235b02b14c850be /arch/powerpc/include | |
| parent | 448d64f8f4c147db466c549550767cc515a4d34c (diff) | |
perf_counter: powerpc: Change how processor-specific back-ends get selected
At present, the powerpc generic (processor-independent) perf_counter
code has list of processor back-end modules, and at initialization,
it looks at the PVR (processor version register) and has a switch
statement to select a suitable processor-specific back-end.
This is going to become inconvenient as we add more processor-specific
back-ends, so this inverts the order: now each back-end checks whether
it applies to the current processor, and registers itself if so.
Furthermore, instead of looking at the PVR, back-ends now check the
cur_cpu_spec->oprofile_cpu_type string and match on that.
Lastly, each back-end now specifies a name for itself so the core can
print a nice message when a back-end registers itself.
This doesn't provide any support for unregistering back-ends, but that
wouldn't be hard to do and would allow back-ends to be modules.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linuxppc-dev@ozlabs.org
Cc: benh@kernel.crashing.org
LKML-Reference: <19000.55529.762227.518531@cargo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/perf_counter.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/perf_counter.h b/arch/powerpc/include/asm/perf_counter.h index 2ceb0fefa93..8ccd4e15576 100644 --- a/arch/powerpc/include/asm/perf_counter.h +++ b/arch/powerpc/include/asm/perf_counter.h @@ -21,6 +21,7 @@ * describe the PMU on a particular POWER-family CPU. */ struct power_pmu { + const char *name; int n_counter; int max_alternatives; unsigned long add_fields; @@ -41,8 +42,6 @@ struct power_pmu { [PERF_COUNT_HW_CACHE_RESULT_MAX]; }; -extern struct power_pmu *ppmu; - /* * Values for power_pmu.flags */ @@ -56,6 +55,8 @@ extern struct power_pmu *ppmu; #define PPMU_LIMITED_PMC_REQD 2 /* have to put this on a limited PMC */ #define PPMU_ONLY_COUNT_RUN 4 /* only counting in run state */ +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); |