From: Leo Yan <leo.yan@linaro.org> To: Jonathan Corbet <corbet@lwn.net>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Wei Xu <xuwei5@hisilicon.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Andy Gross <andy.gross@linaro.org>, David Brown <david.brown@linaro.org>, Michael Turquette <mturquette@baylibre.com>, Stephen Boyd <sboyd@codeaurora.org>, Mathieu Poirier <mathieu.poirier@linaro.org>, Guodong Xu <guodong.xu@linaro.org>, John Stultz <john.stultz@linaro.org>, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-clk@vger.kernel.org, mike.leach@linaro.org, Suzuki.Poulose@arm.com, sudeep.holla@arm.com Cc: Leo Yan <leo.yan@linaro.org> Subject: [PATCH v5 2/9] doc: Add documentation for Coresight CPU debug Date: Sun, 26 Mar 2017 02:23:10 +0800 [thread overview] Message-ID: <1490466197-29163-3-git-send-email-leo.yan@linaro.org> (raw) In-Reply-To: <1490466197-29163-1-git-send-email-leo.yan@linaro.org> Update kernel-parameters.txt to add two new parameters: - coresight_cpu_debug.enable is a knob to enable debugging at boot time. - coresight_cpu_debug.idle_constraint is used to constrain idle states to ensure Coresight CPU debug component can be accessible. Signed-off-by: Leo Yan <leo.yan@linaro.org> --- Documentation/admin-guide/kernel-parameters.txt | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 2ba45ca..6ed57d9 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -650,6 +650,27 @@ /proc/<pid>/coredump_filter. See also Documentation/filesystems/proc.txt. + coresight_cpu_debug.enable + [ARM,ARM64] + Format: <bool> + Enable/disable the CPU sampling based debugging. + 0: default value, disable debugging + 1: enable debugging at boot time + + coresight_cpu_debug.idle_constraint + [ARM,ARM64] + Format: <int> + Some platforms have designed the idle states to disable + CPU power domain and need manually set constraint so + can access coresight CPU debug component safely. Setting + this parameter for latency requirement in + microseconds, finally we can constraint all or partial + idle states to ensure the CPU power domain is enabled. + Default is -1, which means no limiation to CPU idle + states; if set to 0, this means disabling all idle + states; user can choose other platform dependent values + so can disable specific idle states for the platform. + cpuidle.off=1 [CPU_IDLE] disable the cpuidle sub-system -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: leo.yan@linaro.org (Leo Yan) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 2/9] doc: Add documentation for Coresight CPU debug Date: Sun, 26 Mar 2017 02:23:10 +0800 [thread overview] Message-ID: <1490466197-29163-3-git-send-email-leo.yan@linaro.org> (raw) In-Reply-To: <1490466197-29163-1-git-send-email-leo.yan@linaro.org> Update kernel-parameters.txt to add two new parameters: - coresight_cpu_debug.enable is a knob to enable debugging at boot time. - coresight_cpu_debug.idle_constraint is used to constrain idle states to ensure Coresight CPU debug component can be accessible. Signed-off-by: Leo Yan <leo.yan@linaro.org> --- Documentation/admin-guide/kernel-parameters.txt | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 2ba45ca..6ed57d9 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -650,6 +650,27 @@ /proc/<pid>/coredump_filter. See also Documentation/filesystems/proc.txt. + coresight_cpu_debug.enable + [ARM,ARM64] + Format: <bool> + Enable/disable the CPU sampling based debugging. + 0: default value, disable debugging + 1: enable debugging at boot time + + coresight_cpu_debug.idle_constraint + [ARM,ARM64] + Format: <int> + Some platforms have designed the idle states to disable + CPU power domain and need manually set constraint so + can access coresight CPU debug component safely. Setting + this parameter for latency requirement in + microseconds, finally we can constraint all or partial + idle states to ensure the CPU power domain is enabled. + Default is -1, which means no limiation to CPU idle + states; if set to 0, this means disabling all idle + states; user can choose other platform dependent values + so can disable specific idle states for the platform. + cpuidle.off=1 [CPU_IDLE] disable the cpuidle sub-system -- 2.7.4
next prev parent reply other threads:[~2017-03-25 18:23 UTC|newest] Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top 2017-03-25 18:23 [PATCH v5 0/9] coresight: enable debug module Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-25 18:23 ` [PATCH v5 1/9] coresight: bindings for CPU " Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-30 22:49 ` Rob Herring 2017-03-30 22:49 ` Rob Herring 2017-03-31 9:04 ` Suzuki K Poulose 2017-03-31 9:04 ` Suzuki K Poulose 2017-03-31 9:04 ` Suzuki K Poulose 2017-03-25 18:23 ` Leo Yan [this message] 2017-03-25 18:23 ` [PATCH v5 2/9] doc: Add documentation for Coresight CPU debug Leo Yan 2017-03-25 18:23 ` [PATCH v5 3/9] coresight: of_get_coresight_platform_data: Add missing of_node_put Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-25 18:23 ` [PATCH v5 4/9] coresight: refactor with function of_coresight_get_cpu Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-31 9:05 ` Suzuki K Poulose 2017-03-31 9:05 ` Suzuki K Poulose 2017-03-31 9:05 ` Suzuki K Poulose 2017-03-25 18:23 ` [PATCH v5 6/9] coresight: add support for CPU debug module Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-27 16:34 ` Suzuki K Poulose 2017-03-27 16:34 ` Suzuki K Poulose 2017-03-27 16:34 ` Suzuki K Poulose 2017-03-29 3:07 ` Leo Yan 2017-03-29 3:07 ` Leo Yan 2017-03-29 9:07 ` Suzuki K Poulose 2017-03-29 9:07 ` Suzuki K Poulose 2017-03-29 9:07 ` Suzuki K Poulose 2017-03-29 10:27 ` Leo Yan 2017-03-29 10:27 ` Leo Yan 2017-03-29 10:31 ` Suzuki K Poulose 2017-03-29 10:31 ` Suzuki K Poulose [not found] ` <89b6c6c7-0da0-6891-312a-c9221851c20a-5wv7dgnIgG8@public.gmane.org> 2017-03-29 10:37 ` Leo Yan 2017-03-29 10:37 ` Leo Yan 2017-03-29 10:37 ` Leo Yan 2017-03-29 15:50 ` Suzuki K Poulose 2017-03-29 15:50 ` Suzuki K Poulose 2017-03-29 15:50 ` Suzuki K Poulose 2017-03-29 15:17 ` Mike Leach 2017-03-29 15:17 ` Mike Leach 2017-03-29 15:17 ` Mike Leach 2017-03-30 1:18 ` Leo Yan 2017-03-30 1:18 ` Leo Yan 2017-03-30 1:18 ` Leo Yan 2017-03-29 15:41 ` Mathieu Poirier 2017-03-29 15:41 ` Mathieu Poirier 2017-03-29 15:41 ` Mathieu Poirier 2017-03-28 16:50 ` Mathieu Poirier 2017-03-28 16:50 ` Mathieu Poirier 2017-03-29 1:54 ` Leo Yan 2017-03-29 1:54 ` Leo Yan 2017-03-29 14:56 ` Mike Leach 2017-03-29 14:56 ` Mike Leach 2017-03-29 14:56 ` Mike Leach 2017-03-30 1:03 ` Leo Yan 2017-03-30 1:03 ` Leo Yan 2017-03-30 1:03 ` Leo Yan 2017-03-30 9:00 ` Suzuki K Poulose 2017-03-30 9:00 ` Suzuki K Poulose 2017-03-30 9:00 ` Suzuki K Poulose 2017-03-30 13:51 ` Leo Yan 2017-03-30 13:51 ` Leo Yan 2017-03-30 13:51 ` Leo Yan 2017-03-30 15:47 ` Sudeep Holla 2017-03-30 15:47 ` Sudeep Holla 2017-03-30 15:47 ` Sudeep Holla 2017-03-29 16:55 ` Mathieu Poirier 2017-03-29 16:55 ` Mathieu Poirier [not found] ` <20170329165535.GB24889-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2017-03-30 1:59 ` Leo Yan 2017-03-30 1:59 ` Leo Yan 2017-03-30 1:59 ` Leo Yan 2017-03-30 15:46 ` Mathieu Poirier 2017-03-30 15:46 ` Mathieu Poirier 2017-03-30 15:46 ` Mathieu Poirier 2017-03-30 15:46 ` Mathieu Poirier [not found] ` <CANLsYkwPYSvy2xjf8uuvx1WGWpGdMFy7kF=30VbvgW+jDvnFuw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2017-03-30 16:04 ` Sudeep Holla 2017-03-30 16:04 ` Sudeep Holla 2017-03-30 16:04 ` Sudeep Holla 2017-03-30 16:04 ` Sudeep Holla [not found] ` <1490466197-29163-7-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2017-03-30 15:56 ` Sudeep Holla 2017-03-30 15:56 ` Sudeep Holla 2017-03-30 15:56 ` Sudeep Holla 2017-03-31 0:54 ` Leo Yan 2017-03-31 0:54 ` Leo Yan 2017-03-25 18:23 ` [PATCH v5 7/9] clk: hi6220: add debug APB clock Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-04-04 21:51 ` Stephen Boyd 2017-04-04 21:51 ` Stephen Boyd [not found] ` <20170404215109.GH18246-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2017-04-06 13:59 ` Leo Yan 2017-04-06 13:59 ` Leo Yan 2017-04-06 13:59 ` Leo Yan 2017-03-25 18:23 ` [PATCH v5 8/9] arm64: dts: hi6220: register debug module Leo Yan 2017-03-25 18:23 ` Leo Yan [not found] ` <1490466197-29163-1-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2017-03-25 18:23 ` [PATCH v5 5/9] coresight: use const for device_node structures Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-25 18:23 ` Leo Yan [not found] ` <1490466197-29163-6-git-send-email-leo.yan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> 2017-04-04 21:48 ` Stephen Boyd 2017-04-04 21:48 ` Stephen Boyd 2017-04-04 21:48 ` Stephen Boyd 2017-03-25 18:23 ` [PATCH v5 9/9] arm64: dts: qcom: msm8916: Add debug unit Leo Yan 2017-03-25 18:23 ` Leo Yan 2017-03-25 18:23 ` Leo Yan
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