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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id cv17-20020a17090afd1100b002a02f8d350fsm2628830pjb.53.2024.03.29.02.27.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Mar 2024 02:27:47 -0700 (PDT) From: Max Hsu Date: Fri, 29 Mar 2024 17:26:18 +0800 Subject: [PATCH RFC 02/11] dt-bindings: riscv: Add Sdtrig optional CSRs existence on DT Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240329-dev-maxh-lin-452-6-9-v1-2-1534f93b94a7@sifive.com> References: <20240329-dev-maxh-lin-452-6-9-v1-0-1534f93b94a7@sifive.com> In-Reply-To: <20240329-dev-maxh-lin-452-6-9-v1-0-1534f93b94a7@sifive.com> To: Conor Dooley , Rob Herring , Krzysztof Kozlowski , Paul Walmsley , Palmer Dabbelt , Albert Ou , "Rafael J. Wysocki" , Pavel Machek , Anup Patel , Atish Patra , Paolo Bonzini , Shuah Khan Cc: Palmer Dabbelt , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kselftest@vger.kernel.org, Max Hsu X-Mailer: b4 0.13.0 The mcontext/hcontext/scontext CSRs are optional in the Sdtrig extension, to prevent RW operations to the missing CSRs, which will cause illegal instructions. As a solution, we have proposed the dt format for these CSRs. Signed-off-by: Max Hsu --- Documentation/devicetree/bindings/riscv/cpus.yaml | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml index d87dd50f1a4b..c713a48c5025 100644 --- a/Documentation/devicetree/bindings/riscv/cpus.yaml +++ b/Documentation/devicetree/bindings/riscv/cpus.yaml @@ -137,6 +137,24 @@ properties: DMIPS/MHz, relative to highest capacity-dmips-mhz in the system. + debug: + type: object + properties: + compatible: + const: riscv,debug-v1.0.0 + trigger-module: + type: object + description: | + An indication set of optional CSR existence from + riscv-debug-spec Sdtrig extension + properties: + mcontext-present: + type: boolean + hcontext-present: + type: boolean + scontext-present: + type: boolean + anyOf: - required: - riscv,isa