linux-kernel - [tip: perf/core] perf/x86: Hybrid PMU support for hardware cache event

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 20 Apr 2021 10:46:47 -0000
From:   "tip-bot2 for Kan Liang" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Kan Liang <kan.liang@...ux.intel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] perf/x86: Hybrid PMU support for hardware cache event

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     0d18f2dfead8dd63bf1186c9ef38528d6a615a55
Gitweb:        https://git.kernel.org/tip/0d18f2dfead8dd63bf1186c9ef38528d6a615a55
Author:        Kan Liang <kan.liang@...ux.intel.com>
AuthorDate:    Mon, 12 Apr 2021 07:30:48 -07:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 19 Apr 2021 20:03:25 +02:00

perf/x86: Hybrid PMU support for hardware cache event

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@...radead.org>
Signed-off-by: Kan Liang <kan.liang@...ux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/1618237865-33448-9-git-send-email-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 1aeb31c..e8cb892 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 2688e45..b65cf46 100644
--- a/arch/x86/events/perf_event.h
+++ b/arch/x86/events/perf_event.h
@@ -639,6 +639,15 @@ 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)