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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2010-06-30 23:03:51 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2010-08-19 01:30:59 +0200 |
| commit | 56962b4449af34070bb1994621ef4f0265eed4d8 (patch) | |
| tree | b4c5dfee35d272c71cba80e75a51cb3e7070e430 /include/linux/perf_event.h | |
| parent | 70791ce9ba68a5921c9905ef05d23f62a90bc10c (diff) | |
| download | linux-56962b4449af34070bb1994621ef4f0265eed4d8.tar.gz linux-56962b4449af34070bb1994621ef4f0265eed4d8.tar.bz2 linux-56962b4449af34070bb1994621ef4f0265eed4d8.zip | |
perf: Generalize some arch callchain code
- Most archs use one callchain buffer per cpu, except x86 that needs
to deal with NMIs. Provide a default perf_callchain_buffer()
implementation that x86 overrides.
- Centralize all the kernel/user regs handling and invoke new arch
handlers from there: perf_callchain_user() / perf_callchain_kernel()
That avoid all the user_mode(), current->mm checks and so...
- Invert some parameters in perf_callchain_*() helpers: entry to the
left, regs to the right, following the traditional (dst, src).
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Tested-by: Will Deacon <will.deacon@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: David Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Borislav Petkov <bp@amd64.org>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 358880404b42..4db61dded388 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -976,7 +976,15 @@ extern int perf_unregister_guest_info_callbacks(struct perf_guest_info_callbacks extern void perf_event_comm(struct task_struct *tsk); extern void perf_event_fork(struct task_struct *tsk); -extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs); +/* Callchains */ +DECLARE_PER_CPU(struct perf_callchain_entry, perf_callchain_entry); + +extern void perf_callchain_user(struct perf_callchain_entry *entry, + struct pt_regs *regs); +extern void perf_callchain_kernel(struct perf_callchain_entry *entry, + struct pt_regs *regs); +extern struct perf_callchain_entry *perf_callchain_buffer(void); + static inline void perf_callchain_store(struct perf_callchain_entry *entry, u64 ip) |