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[103.229.18.19]) by smtp.googlemail.com with ESMTPSA id d2e1a72fcca58-851b6f8b189sm562883b3a.34.2026.08.17.09.02.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2026 09:02:43 -0700 (PDT) From: Mayuresh Chitale To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Guodong Xu , Andrew Morton , Deepak Gupta , Xu Lu , Pincheng Wang Cc: Mayuresh Chitale , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 1/3] dt-bindings: riscv: Add Sspesa and Ssplcofi extensions Date: Mon, 17 Aug 2026 21:32:17 +0530 Message-ID: <20260817160222.3313295-2-mayuresh.chitale@oss.qualcomm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260817160222.3313295-1-mayuresh.chitale@oss.qualcomm.com> References: <20260817160222.3313295-1-mayuresh.chitale@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: t2Z9wNbEgPM-_r8Qi14JKpDtQGZYvVb4 X-Proofpoint-ORIG-GUID: t2Z9wNbEgPM-_r8Qi14JKpDtQGZYvVb4 X-Authority-Analysis: v=2.4 cv=dLaWXuZb c=1 sm=1 tr=0 ts=6a8330a5 cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=ZpdpYltYx_vBUK5n70dp:22 a=EUspDBNiAAAA:8 a=2yNJKbwY4VjyOEKDNOIA:9 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE3MDEyMyBTYWx0ZWRfX27+YW0CWAXbq Pjpzhp33wd5HhrS6zNX0gGgfOQlWFpr4qadC35ZOVgBxdhpQ/pzVQSmC0O7F+bepOAV64eubRVO eumoNedDtW3Qb4vl4rcvyh8irt2HaVvBY7c9N2pqXnC2UE2+Orro1zE/Pmd8+uZKqElp2gpOkek F2kmQVhmZmoI/8dsCSXRis0fFHIC6E7PFhJAChvk8FxaxYCfISuqGjoXkcpF66DwF4UNTzecUSP sqNVptpAtKi5NJhbpANKflqSvxDbCGVrgcHzv5E0reS2DKcapMtTyYEZwd8GRrpvKnd3HyGkB7D UbrCXdO4O7SsAjmMrkMrPJIjjACZOVEqsNUm2mVZ3CrJ0Dmd3qVxpAuOXHfQ5RGfF7WnZWSKq9F 9ZszIyB++JF4W55VHFcL5Z0yPL8vvp/ZI3bd/dWqXSJttjJqrmtl3XYED2evt4SC2tKmNOwzVC5 /IhLHoElJMOSThB7ZFQ== X-Proofpoint-Spam-Info: AW1haW4tMjYwODE3MDEyMyBTYWx0ZWRfXw89HpMt7QMch OpkAM0FKK3XmwArOFJTucdK8CRIO/lH9qDRurdUYUPt+hLXIV3Q5L+rYVHrOkALHtOeQe/HB7Vn 0x3kirI36OxVTc1JqrQVOqcDM3z+7/c= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-17_02,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 adultscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608170123 Document the RISC-V Performance Event Sampling extensions Sspesa (Precise Event Sample Attribution) and Ssplcofi (Precise Local Counter Overflow Interrupt) in the ISA extensions binding. Add a dependency rule requiring Sspesa to be present whenever Ssplcofi is present. Signed-off-by: Mayuresh Chitale --- .../devicetree/bindings/riscv/extensions.yaml | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml index 5ffc40d599c0..f316b93754ff 100644 --- a/Documentation/devicetree/bindings/riscv/extensions.yaml +++ b/Documentation/devicetree/bindings/riscv/extensions.yaml @@ -232,6 +232,18 @@ properties: ratified at commit d70011dde6c2 ("Update to ratified state") of riscv-j-extension. + - const: sspesa + description: | + The standard Sspesa supervisor-level extension for precise event + sample attribution, as defined in the RISC-V Performance Event + Sampling specification. + + - const: ssplcofi + description: | + The standard Ssplcofi supervisor-level extension for precise local + counter overflow interrupts, as defined in the RISC-V Performance + Event Sampling specification. Ssplcofi depends on Sspesa. + - const: ssstateen description: | The standard Ssstateen extension for supervisor-mode view of the @@ -934,6 +946,13 @@ properties: const: smnpm - contains: const: ssnpm + # Ssplcofi depends on Sspesa + - if: + contains: + const: ssplcofi + then: + contains: + const: sspesa # Za64rs and Ziccrse depend on Zalrsc or A - if: contains: -- 2.43.0