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Thu, 10 Jul 2025 05:53:05 -0700 (PDT) From: Himanshu Chauhan To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Himanshu Chauhan Subject: [PATCH v1 1/2] riscv: Add SBI debug trigger extension and function ids Date: Thu, 10 Jul 2025 18:22:30 +0530 Message-ID: <20250710125231.653967-2-hchauhan@ventanamicro.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250710125231.653967-1-hchauhan@ventanamicro.com> References: <20250710125231.653967-1-hchauhan@ventanamicro.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Debug trigger extension is an SBI extension to support native debugging in S-mode and VS-mode. This patch adds the extension and the function IDs defined by the extension. Signed-off-by: Himanshu Chauhan --- arch/riscv/include/asm/sbi.h | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 341e74238aa0..d1d906bc5365 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -36,6 +36,7 @@ enum sbi_ext_id { SBI_EXT_STA =3D 0x535441, SBI_EXT_NACL =3D 0x4E41434C, SBI_EXT_FWFT =3D 0x46574654, + SBI_EXT_DBTR =3D 0x44425452, =20 /* Experimentals extensions must lie within this range */ SBI_EXT_EXPERIMENTAL_START =3D 0x08000000, @@ -430,6 +431,34 @@ enum sbi_fwft_feature_t { =20 #define SBI_FWFT_SET_FLAG_LOCK BIT(0) =20 +/* SBI debug triggers function IDs */ +enum sbi_ext_dbtr_fid { + SBI_EXT_DBTR_NUM_TRIGGERS =3D 0, + SBI_EXT_DBTR_SETUP_SHMEM, + SBI_EXT_DBTR_TRIG_READ, + SBI_EXT_DBTR_TRIG_INSTALL, + SBI_EXT_DBTR_TRIG_UPDATE, + SBI_EXT_DBTR_TRIG_UNINSTALL, + SBI_EXT_DBTR_TRIG_ENABLE, + SBI_EXT_DBTR_TRIG_DISABLE, +}; + +struct sbi_dbtr_data_msg { + unsigned long tstate; + unsigned long tdata1; + unsigned long tdata2; + unsigned long tdata3; +}; + +struct sbi_dbtr_id_msg { + unsigned long idx; +}; + +union sbi_dbtr_shmem_entry { + struct sbi_dbtr_data_msg data; + struct sbi_dbtr_id_msg id; +}; + /* SBI spec version fields */ #define SBI_SPEC_VERSION_DEFAULT 0x1 #define SBI_SPEC_VERSION_MAJOR_SHIFT 24 --=20 2.45.2