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| author | Robert Richter <robert.richter@amd.com> | 2011-12-15 20:56:39 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2012-03-08 14:35:22 +0400 |
| commit | db98c5faf8cb350212ea3af786cb3ba0d4e7a01e (patch) | |
| tree | dedbbe76714b416b5e6d62d30b8488a9c0f6c1c2 /arch/x86/include/asm/perf_event.h | |
| parent | 4db2e8e6500d9ba6406f2714fa3968b39a325274 (diff) | |
| download | linux-db98c5faf8cb350212ea3af786cb3ba0d4e7a01e.tar.xz | |
perf/x86: Implement 64-bit counter support for IBS
This patch implements 64 bit counter support for IBS. The
sampling period is no longer limited to the hw counter width.
The functions perf_event_set_period() and
perf_event_try_update() can be used as generic functions. They
can replace similar code that is duplicate across architectures.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323968199-9326-5-git-send-email-robert.richter@amd.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/perf_event.h')
| -rw-r--r-- | arch/x86/include/asm/perf_event.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index e8fb2c7a5f4f..9cf66965141d 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -177,6 +177,8 @@ struct x86_pmu_capability { #define IBS_FETCH_MAX_CNT 0x0000FFFFULL /* IbsOpCtl bits */ +/* lower 4 bits of the current count are ignored: */ +#define IBS_OP_CUR_CNT (0xFFFF0ULL<<32) #define IBS_OP_CNT_CTL (1ULL<<19) #define IBS_OP_VAL (1ULL<<18) #define IBS_OP_ENABLE (1ULL<<17) |