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( [120.237.158.181]) by bizesmtp.qq.com (ESMTP) with id ; Fri, 23 Oct 2026 11:15:30 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 0 X-BIZMAIL-ID: 12303599440400516652 EX-QQ-RecipientCnt: 26 From: Zane Leung To: gregkh@linuxfoundation.org, palmer@dabbelt.com, pjw@kernel.org, alexander.shishkin@linux.intel.com, suzuki.poulose@arm.com, mchitale@gmail.com, anup@brainfault.org, irogers@google.com Cc: mike.leach@arm.com, james.clark@linaro.org, leo.yan@arm.com, peterz@infradead.org, mingo@redhat.com, namhyung@kernel.org, mark.rutland@arm.com, jolsa@kernel.org, adrian.hunter@intel.com, alex@ghiti.fr, atish.patra@linux.dev, andrew.jones@oss.qualcomm.com, sunilvl@oss.qualcomm.com, liangzhen@linux.spacemit.com, zhuangqiubin@linux.spacemit.com, coresight@lists.linaro.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 06/24] gtrace: Replace owner PID with perf_event pointer in gtrace_path Date: Fri, 23 Oct 2026 11:14:47 +0800 Message-Id: <20261023031505.2020925-7-liangzhen@linux.spacemit.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261023031505.2020925-1-liangzhen@linux.spacemit.com> References: <20261023031505.2020925-1-liangzhen@linux.spacemit.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: esmtpsz:linux.spacemit.com:qybglogicsvrgz:qybglogicsvrgz6b-0 X-QQ-XMAILINFO: NDgMZBR9sMmaBCRONdrM3P746ARtphw2NnsOCyjNE1VwQ3l0UDoptDZu wR/b7mE1YKaq/9fdIUx6ukCey2WfctVxT+0B5I5SQdjKDr0kGPeeHhSwHG6Y0r/FlObUDEF sOmY9Q+twkv/BiG7BxzQxtsEQlDtRl4FlomlXvwFsSKaFAe5AmY8I/FRTW8X2EFqRrdPgnU T7m4tmHIw4vPonLJFFVB8BDgBCGdOe92NUFe1x8RIsf1UhMyW4wdAWHo2Dk7YGp+QvwDl8I KDJXMRx3kUdROjPGTEX4A484ljG0TipVfxmNkx2ZBQ4TGmElmqGbBB1EfJOLv5iRQoqnQbS fXabKCNi5nDwaVD6gOR1RSDNIf0r9F3z4MJAeeQB6ZmA60lLZT2mWF0u7nmSRVTo77yQq03 w6ExpAU52iEgn2aHB5CEQQ1ZVNPyior4OGNXFHAwCK/aO/RLU0g7Uj/s1VGLlZ+FAJpIWK2 wpyHt55WAwE0a8lgdIh+bQcmt87T/b4Mnelj3WZ7P+axrzaw9NHwG1ZO4SoXJfQjsmpKnkN +yomScN9Kzj429Rqbde4kzQbMCw6aqcXkU4QMrhLQJUmwbBz8MbcDDZB5U0c0CTWnQ5LUSi TUU0LTM1wjXcO/417PlzShYHqlKMf8a9cxqDKX0xdrvYv2p701PVTBNdvCFO/3YGzKNvMqD SdGZvqkseSjJ4hzK9Tbal1451PJVgAm+BEOAoGEbX8qELwOl3TbxopYUggggnZ4TyAeNvi9 8Cq6MX8uXCM2k01BKp9ZvVfoZeJ3O0RoqbpGO20JC8LjuhRFvR8wA4dFFXtGN0+Rhv+Vmu8 bnGsw0GepSTwkHrdtIi7/KY2Hl251pTGGb3c37ZkC+LpoJV7xzEcKPl3CX5yQSerpMjAeHa MnXzb3jsvA5I0N6Ww+hHDZohU4prFP7a/RgpZ+ynL6jvZJhLh9vUQN7EBwDf7v4LgfV9yZt YxYEushH82Aqcz08WQnzBxI/Bs90ufHMvGQtSEaNTG2mXXfi6ntPfyA26Yz7GYDZqv6PMDH MjFmIEIOa/9PUwEoDN7UfK6fqiA794+TLvZlPGwKmiRJ5wn1qp4MicinQA5TbbRZxlNbY1z CSyve3yVs59 X-QQ-XMRINFO: NI4Ajvh11aEjEMj13RCX7UuhPEoou2bs1g== X-QQ-RECHKSPAM: 0 Replace 'pid_t owner' with 'struct perf_event *event' in struct gtrace_path. This allows component drivers to directly access the perf_event for PMU configuration. Signed-off-by: Zane Leung --- drivers/hwtracing/gtrace/gtrace-core.c | 12 ++++++++++-- drivers/hwtracing/gtrace/gtrace-perf.c | 2 +- include/linux/gtrace.h | 2 +- 3 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/hwtracing/gtrace/gtrace-core.c b/drivers/hwtracing/gtrace/gtrace-core.c index cae0a7fa820f..3f55d8b7302d 100644 --- a/drivers/hwtracing/gtrace/gtrace-core.c +++ b/drivers/hwtracing/gtrace/gtrace-core.c @@ -13,6 +13,7 @@ #include #include #include +#include #define GTRACE_POLL_TIMEOUT_US_DEFAULT 10 @@ -665,10 +666,16 @@ static int __gtrace_comp_start(struct gtrace_component *comp, raw_spin_lock_irqsave(&cpriv->lock, flags); if (cpriv->start_count) { - if (cpriv->owner != path->owner || cpriv->mode != path->mode) { + if (cpriv->mode != path->mode) { ret = -EBUSY; goto out; } + if (cpriv->mode == GTRACE_COMPONENT_MODE_PERF) { + if (cpriv->owner != task_pid_nr(path->event->owner)) { + ret = -EBUSY; + goto out; + } + } } else { if (gtdrv->start) { comp->path = path; @@ -678,8 +685,9 @@ static int __gtrace_comp_start(struct gtrace_component *comp, goto out; } } - cpriv->owner = path->owner; cpriv->mode = path->mode; + if (cpriv->mode == GTRACE_COMPONENT_MODE_PERF) + cpriv->owner = task_pid_nr(path->event->owner); } cpriv->start_count++; diff --git a/drivers/hwtracing/gtrace/gtrace-perf.c b/drivers/hwtracing/gtrace/gtrace-perf.c index 703c12b95665..2fcfbae9acf6 100644 --- a/drivers/hwtracing/gtrace/gtrace-perf.c +++ b/drivers/hwtracing/gtrace/gtrace-perf.c @@ -137,7 +137,7 @@ static void *gtrace_setup_aux(struct perf_event *event, void **pages, continue; } - path->owner = task_pid_nr(event->owner); + path->event = event; *gtrace_event_cpu_path_ptr(event_data, cpu) = path; } diff --git a/include/linux/gtrace.h b/include/linux/gtrace.h index 76b1aa9cfe79..3d769b405030 100644 --- a/include/linux/gtrace.h +++ b/include/linux/gtrace.h @@ -325,7 +325,7 @@ struct gtrace_path { enum gtrace_component_mode mode; u32 trace_id; #define GTRACE_INVALID_TRACE_ID 0 - pid_t owner; + struct perf_event *event; }; struct gtrace_component *gtrace_path_source(struct gtrace_path *path); -- 2.34.1