lkml.org 
[lkml]   [2021]   [Apr]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V6 08/25] perf/x86: Hybrid PMU support for hardware cache event
Date
From: Kan Liang <kan.liang@linux.intel.com>

The hardware cache events are different among hybrid PMUs. Each hybrid
PMU should have its own hw cache event table.

Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
---
arch/x86/events/core.c | 5 ++---
arch/x86/events/perf_event.h | 9 +++++++++
2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 3b99864..a5f8a5e 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -376,8 +376,7 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event *event)
return -EINVAL;
cache_result = array_index_nospec(cache_result, PERF_COUNT_HW_CACHE_RESULT_MAX);

- val = hw_cache_event_ids[cache_type][cache_op][cache_result];
-
+ val = hybrid_var(event->pmu, hw_cache_event_ids)[cache_type][cache_op][cache_result];
if (val == 0)
return -ENOENT;

@@ -385,7 +384,7 @@ set_ext_hw_attr(struct hw_perf_event *hwc, struct perf_event *event)
return -EINVAL;

hwc->config |= val;
- attr->config1 = hw_cache_extra_regs[cache_type][cache_op][cache_result];
+ attr->config1 = hybrid_var(event->pmu, hw_cache_extra_regs)[cache_type][cache_op][cache_result];
return x86_pmu_extra_regs(val, event);
}

diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h
index 93d6479..10ef244 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -640,6 +640,15 @@ struct x86_hybrid_pmu {
int num_counters;
int num_counters_fixed;
struct event_constraint unconstrained;
+
+ u64 hw_cache_event_ids
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
+ u64 hw_cache_extra_regs
+ [PERF_COUNT_HW_CACHE_MAX]
+ [PERF_COUNT_HW_CACHE_OP_MAX]
+ [PERF_COUNT_HW_CACHE_RESULT_MAX];
};

static __always_inline struct x86_hybrid_pmu *hybrid_pmu(struct pmu *pmu)
--
2.7.4
\
 
 \ /
  Last update: 2021-04-12 16:42    [W:0.145 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site