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| author | Kan Liang <kan.liang@linux.intel.com> | 2021-01-29 01:40:09 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-02-01 17:31:36 +0300 |
| commit | 1ab5f235c176e93adc4f75000aae6c50fea9db00 (patch) | |
| tree | fff4b2839d7d1b30d3f577a2e1d94b2873ddcba9 /arch/x86/include/asm/perf_event.h | |
| parent | 628d923a3c464db98c1c98bb1e0cd50804caf681 (diff) | |
| download | linux-1ab5f235c176e93adc4f75000aae6c50fea9db00.tar.xz | |
perf/x86/intel: Filter unsupported Topdown metrics event
Intel Sapphire Rapids server will introduce 8 metrics events. Intel
Ice Lake only supports 4 metrics events. A perf tool user may mistakenly
use the unsupported events via RAW format on Ice Lake. The user can
still get a value from the unsupported Topdown metrics event once the
following Sapphire Rapids enabling patch is applied.
To enable the 8 metrics events on Intel Sapphire Rapids, the
INTEL_TD_METRIC_MAX has to be updated, which impacts the
is_metric_event(). The is_metric_event() is a generic function.
On Ice Lake, the newly added SPR metrics events will be mistakenly
accepted as metric events on creation. At runtime, the unsupported
Topdown metrics events will be updated.
Add a variable num_topdown_events in x86_pmu to indicate the available
number of the Topdown metrics event on the platform. Apply the number
into is_metric_event(). Only the supported Topdown metrics events
should be created as metrics events.
Apply the num_topdown_events in icl_update_topdown_event() as well. The
function can be reused by the following patch.
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1611873611-156687-4-git-send-email-kan.liang@linux.intel.com
Diffstat (limited to 'arch/x86/include/asm/perf_event.h')
| -rw-r--r-- | arch/x86/include/asm/perf_event.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h index e2a4c785e4e3..7c2c3023532a 100644 --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -280,8 +280,14 @@ struct x86_pmu_capability { #define INTEL_TD_METRIC_BAD_SPEC 0x8100 /* Bad speculation metric */ #define INTEL_TD_METRIC_FE_BOUND 0x8200 /* FE bound metric */ #define INTEL_TD_METRIC_BE_BOUND 0x8300 /* BE bound metric */ -#define INTEL_TD_METRIC_MAX INTEL_TD_METRIC_BE_BOUND -#define INTEL_TD_METRIC_NUM 4 +/* Level 2 metrics */ +#define INTEL_TD_METRIC_HEAVY_OPS 0x8400 /* Heavy Operations metric */ +#define INTEL_TD_METRIC_BR_MISPREDICT 0x8500 /* Branch Mispredict metric */ +#define INTEL_TD_METRIC_FETCH_LAT 0x8600 /* Fetch Latency metric */ +#define INTEL_TD_METRIC_MEM_BOUND 0x8700 /* Memory bound metric */ + +#define INTEL_TD_METRIC_MAX INTEL_TD_METRIC_MEM_BOUND +#define INTEL_TD_METRIC_NUM 8 static inline bool is_metric_idx(int idx) { |