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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-37520608b52sm8943607eec.13.2026.11.10.14.56.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 10 Nov 2026 14:56:11 -0800 (PST) Date: Tue, 10 Nov 2026 14:55:48 -0800 From: Jonathan Cameron To: Cristian Marussi Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, arm-scmi@vger.kernel.org, linux-doc@vger.kernel.org, sudeep.holla@kernel.org, james.quinlan@broadcom.com, f.fainelli@gmail.com, vincent.guittot@linaro.org, etienne.carriere@st.com, peng.fan@oss.nxp.com, michal.simek@amd.com, d-gole@ti.com, elif.topuz@arm.com, lukasz.luba@arm.com, philip.radford@arm.com, david@kernel.org, souvik.chakravarty@arm.com, leitao@kernel.org, kas@kernel.org, puranjay@kernel.org, usama.arif@linux.dev, kernel-team@meta.com Subject: Re: [PATCH v15 26/35] firmware: arm_scmi: Add Telemetry debugfs ABI documentation Message-ID: <20261110145548.0000663b@oss.qualcomm.com> In-Reply-To: <20261109091221.2532706-27-cristian.marussi@arm.com> References: <20261109091221.2532706-1-cristian.marussi@arm.com> <20261109091221.2532706-27-cristian.marussi@arm.com> Organization: Qualcomm X-Mailer: Claws Mail 4.4.0 (GTK 3.24.51; x86_64-w64-mingw32) 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-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=GKGdgeNK c=1 sm=1 tr=0 ts=6af3a10d cx=c_pps a=PfFC4Oe2JQzmKTvty2cRDw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=kj9zAlcOel0A:10 a=zJRp6_cAMcgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=7CQSdrXTAAAA:8 a=Z4ki0kIUKxbu2UUS7qYA:9 a=CjuIK1q_8ugA:10 a=6Ab_bkdmUrQuMsNx7PHu:22 a=a-qgeE7W1pNrGK8U0ZQC:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTEwMDA5MSBTYWx0ZWRfX+IKkuVRmIiE+ mxEWmJgV47eUyxzlc0p4Oyd2Lp9fie3Yp0WK0blhrGB5QFAcPeFH2APwSL6HZkaKPQ+H36t469g +xFos3KA7Gxi7w3nh7QT2u163FQwvmiAHijCOuNFrUg1BdHxqVsUko59qcVwjoX0lP3SewNz7UP 0rYG7sH/rPwTQ3x1WA5+b9BztKx/FMPMZzjb+wHbq0UVzAE+U2R1EOIchpKCUNdLYAUKB+eHod1 0MvltKlq9kE/mXiUq2wYP5gNK+ZMvLozMejx6+v8TFM36fP3advTEJOG4J4SQ9bmbtv22iYaPvW 3SRvvwwqd+AQMtWHRVwLQLXbz58Zkx9Ao6q/ETtLNNKLNs3lPzloKgdcW5YVVxutgxsubyKDdLj Pme7k/bKUOy2OMGkM3Q3zEvoIxJuGg7z+ZjBWUkJSLS8aA0+kvuIJa8ZrGSuxef46Zx8+xfBl0M Y9GdwmY1wq2k2QjkmjQ== X-Proofpoint-GUID: QpaYPF1g3G1THBBjzSN6DfApK5ASCfG- X-Proofpoint-ORIG-GUID: QpaYPF1g3G1THBBjzSN6DfApK5ASCfG- X-Proofpoint-Spam-Info: AW1haW4tMjYxMTEwMDA5MSBTYWx0ZWRfX8TWI1YENlLBb g9XDH9rreii23xvPYAitZRvnS5hHq9jHFhB8HBP0MKpmTphMLaJF3iqfU9v6y713d9a3EqJYn1Q ZcX9Il7GnTIL5td6ruj+UmMkk7ozuHQ= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-10_07,2026-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 phishscore=0 spamscore=0 bulkscore=0 suspectscore=0 impostorscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2611040001 definitions=main-2611100091 On Mon, 9 Nov 2026 09:12:12 +0000 Cristian Marussi wrote: > Add description of the debugfs SCMI Telemetry protocol ABI. > > Signed-off-by: Cristian Marussi > --- > v5 --> v6 > - fixed typos > --- > Documentation/ABI/testing/debugfs-scmi | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/Documentation/ABI/testing/debugfs-scmi b/Documentation/ABI/testing/debugfs-scmi > index ee7179ab2edf..edbbe360321d 100644 > --- a/Documentation/ABI/testing/debugfs-scmi > +++ b/Documentation/ABI/testing/debugfs-scmi > @@ -68,3 +68,25 @@ Description: Max number of concurrently allowed in-flight SCMI messages for > the currently configured SCMI transport for instance on the > RX channels. > Users: Debugging, any userspace test suite > + > +What: /sys/kernel/debug/scmi//protocols/0x/ > +Date: Nov 2026 > +KernelVersion: 7.3 Overly optimistic use of time travel. > +Contact: cristian.marussi@arm.com > +Description: A subdirectory grouping debug entries related to protocol > + for instance . Each protocol owns and defines the subtree > + of entries rooted under this directory. > +Users: Debugging, any userspace test suite > + > +What: /sys/kernel/debug/scmi//protocols/0x1B/shmtis/ > +Date: Nov 2026 > +KernelVersion: 7.3 > +Contact: cristian.marussi@arm.com > +Description: A set of RO files exposed by the Telemetry protocol (0x1B) in > + order to dump the latest snapshot of each SHMTI memory area in > + binary format: each file is named by its SHMTI id. > + File is seekable and a seek to position zero on an open file > + causes the SHMTI snapshot to be refreshed; file timestamps are > + updated after each snapshot. > + This directory reports SHMTIs for instance . > +Users: Debugging, any userspace test suite