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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-doc@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-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTEwMDA5MSBTYWx0ZWRfXwPpWzUktzL3R 1U3z9QNH/cDb5Ms+eLr7+bqjC6Cv0tmh7JxsmgYH+oean5mM8z/SjCOAuDzMGMRA8VfnrWiuUad PErsQ4bkZWusMJ7lTBPvvPXrEcE8VYPm5VC2qPm79ZZVaj8uLYpa4sw5omRJv7kRDrr3nhPB4gW Va8bRHWxTpqkYtoLdSCm2XvyzAeJDbQIRRZTVAQXkYXByQYGwyhxZ+oKEak1M3WX5ntizz7FSiP V57nfxchMqvT9zDLRVz7Ynf6dYOLskQqB6BVegTfezmuqfzbEbHo3FqYtGk5gNNea2d5ysIpelj nBssV4BcB4FDOzzEs7p7Ng+Rcm7y+ac+ZPd4s049gcFv+N2sTK1FXa8R9JiL1rhR2QcFvTKD15o iTY6Qw2mVOVWwMgF/9bRgGWv5oUPRzOYt95i6e0D1g+PO4I2TEhypYGqguVFm43w6Z4Y+zggsOR sYKWJKlc6qTDUcsOa+A== X-Proofpoint-GUID: bF1BBVgbdmwmOkmHr4dz0tK8sj_l8t-i X-Proofpoint-Spam-Info: AW1haW4tMjYxMTEwMDA5MSBTYWx0ZWRfX4kBCX+/Ot5Tt h2GCNjuSqZS+a8VKRYLbs8gs9vu7QcwBBEpXBKBZpswcOv5ZMKDDh4VkmE1sp/XJpGJV5pgh4C1 uTXng4H0kW19kzW1f5ZbpTB/0wP3CrI= X-Proofpoint-ORIG-GUID: bF1BBVgbdmwmOkmHr4dz0tK8sj_l8t-i X-Authority-Analysis: v=2.4 cv=JNSuIMKb 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=ZpdpYltYx_vBUK5n70dp:22 a=7CQSdrXTAAAA:8 a=Z4ki0kIUKxbu2UUS7qYA:9 a=CjuIK1q_8ugA:10 a=6Ab_bkdmUrQuMsNx7PHu:22 a=a-qgeE7W1pNrGK8U0ZQC:22 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 malwarescore=0 suspectscore=0 phishscore=0 clxscore=1015 adultscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 spamscore=0 priorityscore=1501 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