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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2011-11-20 23:36:02 +0400
committerIngo Molnar <mingo@elte.hu>2011-12-21 14:01:07 +0400
commit35edc2a5095efb189e60dc32bbb9d2663aec6d24 (patch)
tree3296a0dc54c4eb9d9ae5e0715d7521ecbb6d6f7e /kernel/events/hw_breakpoint.c
parent9a0f05cb36888550d1509d60aa55788615abea44 (diff)
downloadlinux-35edc2a5095efb189e60dc32bbb9d2663aec6d24.tar.xz
perf, arch: Rework perf_event_index()
Put the logic to compute the event index into a per pmu method. This is required because the x86 rules are weird and wonderful and don't match the capabilities of the current scheme. AFAIK only powerpc actually has a usable userspace read of the PMCs but I'm not at all sure anybody actually used that. ARM is restored to the default since it currently does not support userspace access at all. And all software events are provided with a method that reports their index as 0 (disabled). Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Michael Cree <mcree@orcon.net.nz> Cc: Will Deacon <will.deacon@arm.com> Cc: Deng-Cheng Zhu <dengcheng.zhu@gmail.com> Cc: Anton Blanchard <anton@samba.org> Cc: Eric B Munson <emunson@mgebm.net> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: David S. Miller <davem@davemloft.net> Cc: Richard Kuo <rkuo@codeaurora.org> Cc: Stephane Eranian <eranian@google.com> Cc: Arun Sharma <asharma@fb.com> Link: http://lkml.kernel.org/n/tip-dfydxodki16lylkt3gl2j7cw@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/events/hw_breakpoint.c')
-rw-r--r--kernel/events/hw_breakpoint.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index b7971d6f38bf..b0309f76d777 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -613,6 +613,11 @@ static void hw_breakpoint_stop(struct perf_event *bp, int flags)
bp->hw.state = PERF_HES_STOPPED;
}
+static int hw_breakpoint_event_idx(struct perf_event *bp)
+{
+ return 0;
+}
+
static struct pmu perf_breakpoint = {
.task_ctx_nr = perf_sw_context, /* could eventually get its own */
@@ -622,6 +627,8 @@ static struct pmu perf_breakpoint = {
.start = hw_breakpoint_start,
.stop = hw_breakpoint_stop,
.read = hw_breakpoint_pmu_read,
+
+ .event_idx = hw_breakpoint_event_idx,
};
int __init init_hw_breakpoint(void)