Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 45B37C433C6
From:   Tingwei Zhang <tingwei@codeaurora.org>
To:     Steven Rostedt <rostedt@goodmis.org>,
        Ingo Molnar <mingo@redhat.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Alexandre Torgue <alexandre.torgue@st.com>
Cc:     Tingwei Zhang <tingwei@codeaurora.org>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        tsoni@codeaurora.org,
        Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>,
        Mao Jinlong <jinlmao@codeaurora.org>,
        linux-kernel@vger.kernel.org,
        linux-stm32@st-md-mailman.stormreply.com,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/6] tracing: export event trace and trace_marker
Date:   Thu,  3 Sep 2020 08:17:00 +0800
Message-Id: <20200903001706.28147-1-tingwei@codeaurora.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Ftrace has ability to export trace packets to other destination.
Currently, only function trace can be exported. This series extends the
support to event trace and trace_maker. STM is one possible destination to
export ftrace. Use separate channel for each CPU to avoid mixing up packets
from different CPUs together.

Change from v2:
Change flag definition to BIT(). (Steven)
Add comment in stm_ftrace_write() to clarify it's safe to use 
smp_processor_id() here since preempt is disabled. (Steven) 

Change from v1:
All changes are suggested by Steven Rostedt.
User separate flag to control function trace, event trace and trace mark.
Allocate channels according to num_possible_cpu() dynamically.
Move ftrace_exports routines up so all ftrace can use them.

Tingwei Zhang (6):
  stm class: ftrace: change dependency to TRACING
  tracing: add flag to control different traces
  tracing: add trace_export support for event trace
  tracing: add trace_export support for trace_marker
  stm class: ftrace: enable supported trace export flag
  stm class: ftrace: use different channel accroding to CPU

 drivers/hwtracing/stm/Kconfig  |   2 +-
 drivers/hwtracing/stm/ftrace.c |   7 +-
 include/linux/trace.h          |   7 +
 kernel/trace/trace.c           | 270 ++++++++++++++++++---------------
 4 files changed, 159 insertions(+), 127 deletions(-)

-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project